1 13b2bc37 2022-10-23 stsp /*
   2 13b2bc37 2022-10-23 stsp  * Copyright (c) 2022 Stefan Sperling <stsp@openbsd.org>
   3 13b2bc37 2022-10-23 stsp  *
   4 13b2bc37 2022-10-23 stsp  * Permission to use, copy, modify, and distribute this software for any
   5 13b2bc37 2022-10-23 stsp  * purpose with or without fee is hereby granted, provided that the above
   6 13b2bc37 2022-10-23 stsp  * copyright notice and this permission notice appear in all copies.
   7 13b2bc37 2022-10-23 stsp  *
   8 13b2bc37 2022-10-23 stsp  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9 13b2bc37 2022-10-23 stsp  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10 13b2bc37 2022-10-23 stsp  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11 13b2bc37 2022-10-23 stsp  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12 13b2bc37 2022-10-23 stsp  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13 13b2bc37 2022-10-23 stsp  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14 13b2bc37 2022-10-23 stsp  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15 13b2bc37 2022-10-23 stsp  */
  16 13b2bc37 2022-10-23 stsp 
  17 13b2bc37 2022-10-23 stsp #include <sys/queue.h>
  18 13b2bc37 2022-10-23 stsp #include <sys/tree.h>
  19 13b2bc37 2022-10-23 stsp #include <sys/time.h>
  20 13b2bc37 2022-10-23 stsp #include <sys/types.h>
  21 13b2bc37 2022-10-23 stsp #include <sys/stat.h>
  22 13b2bc37 2022-10-23 stsp #include <sys/socket.h>
  23 13b2bc37 2022-10-23 stsp #include <sys/un.h>
  24 13b2bc37 2022-10-23 stsp #include <sys/wait.h>
  25 13b2bc37 2022-10-23 stsp 
  26 13b2bc37 2022-10-23 stsp #include <fcntl.h>
  27 13b2bc37 2022-10-23 stsp #include <err.h>
  28 13b2bc37 2022-10-23 stsp #include <errno.h>
  29 13b2bc37 2022-10-23 stsp #include <event.h>
  30 13b2bc37 2022-10-23 stsp #include <limits.h>
  31 13b2bc37 2022-10-23 stsp #include <pwd.h>
  32 13b2bc37 2022-10-23 stsp #include <grp.h>
  33 13b2bc37 2022-10-23 stsp #include <imsg.h>
  34 13b2bc37 2022-10-23 stsp #include <sha1.h>
  35 13b2bc37 2022-10-23 stsp #include <signal.h>
  36 13b2bc37 2022-10-23 stsp #include <siphash.h>
  37 13b2bc37 2022-10-23 stsp #include <stdarg.h>
  38 13b2bc37 2022-10-23 stsp #include <stdio.h>
  39 13b2bc37 2022-10-23 stsp #include <stdlib.h>
  40 13b2bc37 2022-10-23 stsp #include <string.h>
  41 13b2bc37 2022-10-23 stsp #include <syslog.h>
  42 13b2bc37 2022-10-23 stsp #include <unistd.h>
  43 13b2bc37 2022-10-23 stsp 
  44 13b2bc37 2022-10-23 stsp #include "got_error.h"
  45 13b2bc37 2022-10-23 stsp #include "got_opentemp.h"
  46 13b2bc37 2022-10-23 stsp #include "got_path.h"
  47 13b2bc37 2022-10-23 stsp #include "got_repository.h"
  48 13b2bc37 2022-10-23 stsp #include "got_object.h"
  49 13b2bc37 2022-10-23 stsp #include "got_reference.h"
  50 13b2bc37 2022-10-23 stsp 
  51 13b2bc37 2022-10-23 stsp #include "got_lib_delta.h"
  52 13b2bc37 2022-10-23 stsp #include "got_lib_object.h"
  53 13b2bc37 2022-10-23 stsp #include "got_lib_object_cache.h"
  54 13b2bc37 2022-10-23 stsp #include "got_lib_sha1.h"
  55 13b2bc37 2022-10-23 stsp #include "got_lib_gitproto.h"
  56 13b2bc37 2022-10-23 stsp #include "got_lib_pack.h"
  57 13b2bc37 2022-10-23 stsp #include "got_lib_repository.h"
  58 13b2bc37 2022-10-23 stsp 
  59 13b2bc37 2022-10-23 stsp #include "gotd.h"
  60 13b2bc37 2022-10-23 stsp #include "log.h"
  61 d93ecf7d 2022-12-14 stsp #include "listen.h"
  62 0ccf3acb 2022-11-16 stsp #include "auth.h"
  63 13b2bc37 2022-10-23 stsp #include "repo_read.h"
  64 13b2bc37 2022-10-23 stsp #include "repo_write.h"
  65 13b2bc37 2022-10-23 stsp 
  66 13b2bc37 2022-10-23 stsp #ifndef nitems
  67 13b2bc37 2022-10-23 stsp #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
  68 13b2bc37 2022-10-23 stsp #endif
  69 13b2bc37 2022-10-23 stsp 
  70 13b2bc37 2022-10-23 stsp struct gotd_client {
  71 13b2bc37 2022-10-23 stsp 	STAILQ_ENTRY(gotd_client)	 entry;
  72 13b2bc37 2022-10-23 stsp 	enum gotd_client_state		 state;
  73 13b2bc37 2022-10-23 stsp 	struct gotd_client_capability	*capabilities;
  74 13b2bc37 2022-10-23 stsp 	size_t				 ncapa_alloc;
  75 13b2bc37 2022-10-23 stsp 	size_t				 ncapabilities;
  76 13b2bc37 2022-10-23 stsp 	uint32_t			 id;
  77 13b2bc37 2022-10-23 stsp 	int				 fd;
  78 13b2bc37 2022-10-23 stsp 	int				 delta_cache_fd;
  79 13b2bc37 2022-10-23 stsp 	struct gotd_imsgev		 iev;
  80 13b2bc37 2022-10-23 stsp 	struct event			 tmo;
  81 13b2bc37 2022-10-23 stsp 	uid_t				 euid;
  82 13b2bc37 2022-10-23 stsp 	gid_t				 egid;
  83 13b2bc37 2022-10-23 stsp 	struct gotd_child_proc		*repo_read;
  84 13b2bc37 2022-10-23 stsp 	struct gotd_child_proc		*repo_write;
  85 5e25db14 2022-12-29 stsp 	struct gotd_child_proc		*auth;
  86 5e25db14 2022-12-29 stsp 	int				 required_auth;
  87 13b2bc37 2022-10-23 stsp 	char				*packfile_path;
  88 13b2bc37 2022-10-23 stsp 	char				*packidx_path;
  89 13b2bc37 2022-10-23 stsp 	int				 nref_updates;
  90 13b2bc37 2022-10-23 stsp };
  91 13b2bc37 2022-10-23 stsp STAILQ_HEAD(gotd_clients, gotd_client);
  92 13b2bc37 2022-10-23 stsp 
  93 13b2bc37 2022-10-23 stsp static struct gotd_clients gotd_clients[GOTD_CLIENT_TABLE_SIZE];
  94 13b2bc37 2022-10-23 stsp static SIPHASH_KEY clients_hash_key;
  95 13b2bc37 2022-10-23 stsp volatile int client_cnt;
  96 13b2bc37 2022-10-23 stsp static struct timeval timeout = { 3600, 0 };
  97 ef4e2f01 2022-12-29 stsp static struct timeval auth_timeout = { 5, 0 };
  98 13b2bc37 2022-10-23 stsp static struct gotd gotd;
  99 13b2bc37 2022-10-23 stsp 
 100 13b2bc37 2022-10-23 stsp void gotd_sighdlr(int sig, short event, void *arg);
 101 f1752522 2022-10-29 stsp static void gotd_shutdown(void);
 102 b50a2b46 2022-12-29 stsp static const struct got_error *start_repo_child(struct gotd_client *,
 103 b50a2b46 2022-12-29 stsp     enum gotd_procid, struct gotd_repo *, char *, const char *, int, int);
 104 5e25db14 2022-12-29 stsp static const struct got_error *start_auth_child(struct gotd_client *, int,
 105 5e25db14 2022-12-29 stsp     struct gotd_repo *, char *, const char *, int, int);
 106 b50a2b46 2022-12-29 stsp static void kill_proc(struct gotd_child_proc *, int);
 107 13b2bc37 2022-10-23 stsp 
 108 13b2bc37 2022-10-23 stsp __dead static void
 109 13b2bc37 2022-10-23 stsp usage()
 110 13b2bc37 2022-10-23 stsp {
 111 88dec179 2022-10-24 stsp 	fprintf(stderr, "usage: %s [-dv] [-f config-file]\n", getprogname());
 112 88dec179 2022-10-24 stsp 	exit(1);
 113 13b2bc37 2022-10-23 stsp }
 114 13b2bc37 2022-10-23 stsp 
 115 13b2bc37 2022-10-23 stsp static int
 116 13b2bc37 2022-10-23 stsp unix_socket_listen(const char *unix_socket_path, uid_t uid, gid_t gid)
 117 13b2bc37 2022-10-23 stsp {
 118 13b2bc37 2022-10-23 stsp 	struct sockaddr_un sun;
 119 13b2bc37 2022-10-23 stsp 	int fd = -1;
 120 13b2bc37 2022-10-23 stsp 	mode_t old_umask, mode;
 121 13b2bc37 2022-10-23 stsp 
 122 13b2bc37 2022-10-23 stsp 	fd = socket(AF_UNIX, SOCK_STREAM | SOCK_NONBLOCK| SOCK_CLOEXEC, 0);
 123 13b2bc37 2022-10-23 stsp 	if (fd == -1) {
 124 13b2bc37 2022-10-23 stsp 		log_warn("socket");
 125 13b2bc37 2022-10-23 stsp 		return -1;
 126 13b2bc37 2022-10-23 stsp 	}
 127 13b2bc37 2022-10-23 stsp 
 128 13b2bc37 2022-10-23 stsp 	sun.sun_family = AF_UNIX;
 129 13b2bc37 2022-10-23 stsp 	if (strlcpy(sun.sun_path, unix_socket_path,
 130 13b2bc37 2022-10-23 stsp 	    sizeof(sun.sun_path)) >= sizeof(sun.sun_path)) {
 131 13b2bc37 2022-10-23 stsp 		log_warnx("%s: name too long", unix_socket_path);
 132 13b2bc37 2022-10-23 stsp 		close(fd);
 133 13b2bc37 2022-10-23 stsp 		return -1;
 134 13b2bc37 2022-10-23 stsp 	}
 135 13b2bc37 2022-10-23 stsp 
 136 13b2bc37 2022-10-23 stsp 	if (unlink(unix_socket_path) == -1) {
 137 13b2bc37 2022-10-23 stsp 		if (errno != ENOENT) {
 138 13b2bc37 2022-10-23 stsp 			log_warn("unlink %s", unix_socket_path);
 139 13b2bc37 2022-10-23 stsp 			close(fd);
 140 13b2bc37 2022-10-23 stsp 			return -1;
 141 13b2bc37 2022-10-23 stsp 		}
 142 13b2bc37 2022-10-23 stsp 	}
 143 13b2bc37 2022-10-23 stsp 
 144 13b2bc37 2022-10-23 stsp 	old_umask = umask(S_IXUSR|S_IXGRP|S_IWOTH|S_IROTH|S_IXOTH);
 145 13b2bc37 2022-10-23 stsp 	mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP;
 146 13b2bc37 2022-10-23 stsp 
 147 13b2bc37 2022-10-23 stsp 	if (bind(fd, (struct sockaddr *)&sun, sizeof(sun)) == -1) {
 148 13b2bc37 2022-10-23 stsp 		log_warn("bind: %s", unix_socket_path);
 149 13b2bc37 2022-10-23 stsp 		close(fd);
 150 13b2bc37 2022-10-23 stsp 		umask(old_umask);
 151 13b2bc37 2022-10-23 stsp 		return -1;
 152 13b2bc37 2022-10-23 stsp 	}
 153 13b2bc37 2022-10-23 stsp 
 154 13b2bc37 2022-10-23 stsp 	umask(old_umask);
 155 13b2bc37 2022-10-23 stsp 
 156 13b2bc37 2022-10-23 stsp 	if (chmod(unix_socket_path, mode) == -1) {
 157 13b2bc37 2022-10-23 stsp 		log_warn("chmod %o %s", mode, unix_socket_path);
 158 13b2bc37 2022-10-23 stsp 		close(fd);
 159 13b2bc37 2022-10-23 stsp 		unlink(unix_socket_path);
 160 13b2bc37 2022-10-23 stsp 		return -1;
 161 13b2bc37 2022-10-23 stsp 	}
 162 13b2bc37 2022-10-23 stsp 
 163 13b2bc37 2022-10-23 stsp 	if (chown(unix_socket_path, uid, gid) == -1) {
 164 13b2bc37 2022-10-23 stsp 		log_warn("chown %s uid=%d gid=%d", unix_socket_path, uid, gid);
 165 13b2bc37 2022-10-23 stsp 		close(fd);
 166 13b2bc37 2022-10-23 stsp 		unlink(unix_socket_path);
 167 13b2bc37 2022-10-23 stsp 		return -1;
 168 13b2bc37 2022-10-23 stsp 	}
 169 13b2bc37 2022-10-23 stsp 
 170 13b2bc37 2022-10-23 stsp 	if (listen(fd, GOTD_UNIX_SOCKET_BACKLOG) == -1) {
 171 13b2bc37 2022-10-23 stsp 		log_warn("listen");
 172 13b2bc37 2022-10-23 stsp 		close(fd);
 173 13b2bc37 2022-10-23 stsp 		unlink(unix_socket_path);
 174 13b2bc37 2022-10-23 stsp 		return -1;
 175 13b2bc37 2022-10-23 stsp 	}
 176 13b2bc37 2022-10-23 stsp 
 177 13b2bc37 2022-10-23 stsp 	return fd;
 178 13b2bc37 2022-10-23 stsp }
 179 13b2bc37 2022-10-23 stsp 
 180 13b2bc37 2022-10-23 stsp static struct group *
 181 13b2bc37 2022-10-23 stsp match_group(gid_t *groups, int ngroups, const char *unix_group_name)
 182 13b2bc37 2022-10-23 stsp {
 183 13b2bc37 2022-10-23 stsp 	struct group *gr;
 184 13b2bc37 2022-10-23 stsp 	int i;
 185 13b2bc37 2022-10-23 stsp 
 186 13b2bc37 2022-10-23 stsp 	for (i = 0; i < ngroups; i++) {
 187 13b2bc37 2022-10-23 stsp 		gr = getgrgid(groups[i]);
 188 13b2bc37 2022-10-23 stsp 		if (gr == NULL) {
 189 13b2bc37 2022-10-23 stsp 			log_warn("getgrgid %d", groups[i]);
 190 13b2bc37 2022-10-23 stsp 			continue;
 191 13b2bc37 2022-10-23 stsp 		}
 192 13b2bc37 2022-10-23 stsp 		if (strcmp(gr->gr_name, unix_group_name) == 0)
 193 13b2bc37 2022-10-23 stsp 			return gr;
 194 13b2bc37 2022-10-23 stsp 	}
 195 13b2bc37 2022-10-23 stsp 
 196 13b2bc37 2022-10-23 stsp 	return NULL;
 197 13b2bc37 2022-10-23 stsp }
 198 13b2bc37 2022-10-23 stsp 
 199 13b2bc37 2022-10-23 stsp static uint64_t
 200 13b2bc37 2022-10-23 stsp client_hash(uint32_t client_id)
 201 13b2bc37 2022-10-23 stsp {
 202 13b2bc37 2022-10-23 stsp 	return SipHash24(&clients_hash_key, &client_id, sizeof(client_id));
 203 13b2bc37 2022-10-23 stsp }
 204 13b2bc37 2022-10-23 stsp 
 205 13b2bc37 2022-10-23 stsp static void
 206 13b2bc37 2022-10-23 stsp add_client(struct gotd_client *client)
 207 13b2bc37 2022-10-23 stsp {
 208 13b2bc37 2022-10-23 stsp 	uint64_t slot = client_hash(client->id) % nitems(gotd_clients);
 209 13b2bc37 2022-10-23 stsp 	STAILQ_INSERT_HEAD(&gotd_clients[slot], client, entry);
 210 13b2bc37 2022-10-23 stsp 	client_cnt++;
 211 13b2bc37 2022-10-23 stsp }
 212 13b2bc37 2022-10-23 stsp 
 213 13b2bc37 2022-10-23 stsp static struct gotd_client *
 214 13b2bc37 2022-10-23 stsp find_client(uint32_t client_id)
 215 13b2bc37 2022-10-23 stsp {
 216 13b2bc37 2022-10-23 stsp 	uint64_t slot;
 217 13b2bc37 2022-10-23 stsp 	struct gotd_client *c;
 218 13b2bc37 2022-10-23 stsp 
 219 13b2bc37 2022-10-23 stsp 	slot = client_hash(client_id) % nitems(gotd_clients);
 220 13b2bc37 2022-10-23 stsp 	STAILQ_FOREACH(c, &gotd_clients[slot], entry) {
 221 13b2bc37 2022-10-23 stsp 		if (c->id == client_id)
 222 13b2bc37 2022-10-23 stsp 			return c;
 223 13b2bc37 2022-10-23 stsp 	}
 224 13b2bc37 2022-10-23 stsp 
 225 13b2bc37 2022-10-23 stsp 	return NULL;
 226 13b2bc37 2022-10-23 stsp }
 227 13b2bc37 2022-10-23 stsp 
 228 13b2bc37 2022-10-23 stsp static struct gotd_child_proc *
 229 13b2bc37 2022-10-23 stsp get_client_proc(struct gotd_client *client)
 230 13b2bc37 2022-10-23 stsp {
 231 13b2bc37 2022-10-23 stsp 	if (client->repo_read && client->repo_write) {
 232 13b2bc37 2022-10-23 stsp 		fatalx("uid %d is reading and writing in the same session",
 233 13b2bc37 2022-10-23 stsp 		    client->euid);
 234 13b2bc37 2022-10-23 stsp 		/* NOTREACHED */
 235 13b2bc37 2022-10-23 stsp 	}
 236 13b2bc37 2022-10-23 stsp 
 237 13b2bc37 2022-10-23 stsp 	if (client->repo_read)
 238 13b2bc37 2022-10-23 stsp 		return client->repo_read;
 239 13b2bc37 2022-10-23 stsp 	else if (client->repo_write)
 240 13b2bc37 2022-10-23 stsp 		return client->repo_write;
 241 b50a2b46 2022-12-29 stsp 
 242 b50a2b46 2022-12-29 stsp 	return NULL;
 243 b50a2b46 2022-12-29 stsp }
 244 b50a2b46 2022-12-29 stsp 
 245 b50a2b46 2022-12-29 stsp static struct gotd_client *
 246 b50a2b46 2022-12-29 stsp find_client_by_proc_fd(int fd)
 247 b50a2b46 2022-12-29 stsp {
 248 b50a2b46 2022-12-29 stsp 	uint64_t slot;
 249 b50a2b46 2022-12-29 stsp 
 250 b50a2b46 2022-12-29 stsp 	for (slot = 0; slot < nitems(gotd_clients); slot++) {
 251 b50a2b46 2022-12-29 stsp 		struct gotd_client *c;
 252 b50a2b46 2022-12-29 stsp 
 253 b50a2b46 2022-12-29 stsp 		STAILQ_FOREACH(c, &gotd_clients[slot], entry) {
 254 b50a2b46 2022-12-29 stsp 			struct gotd_child_proc *proc = get_client_proc(c);
 255 b50a2b46 2022-12-29 stsp 			if (proc && proc->iev.ibuf.fd == fd)
 256 b50a2b46 2022-12-29 stsp 				return c;
 257 5e25db14 2022-12-29 stsp 			if (c->auth && c->auth->iev.ibuf.fd == fd)
 258 5e25db14 2022-12-29 stsp 				return c;
 259 b50a2b46 2022-12-29 stsp 		}
 260 b50a2b46 2022-12-29 stsp 	}
 261 f1752522 2022-10-29 stsp 
 262 13b2bc37 2022-10-23 stsp 	return NULL;
 263 13b2bc37 2022-10-23 stsp }
 264 13b2bc37 2022-10-23 stsp 
 265 13b2bc37 2022-10-23 stsp static int
 266 13b2bc37 2022-10-23 stsp client_is_reading(struct gotd_client *client)
 267 13b2bc37 2022-10-23 stsp {
 268 13b2bc37 2022-10-23 stsp 	return client->repo_read != NULL;
 269 13b2bc37 2022-10-23 stsp }
 270 13b2bc37 2022-10-23 stsp 
 271 13b2bc37 2022-10-23 stsp static int
 272 13b2bc37 2022-10-23 stsp client_is_writing(struct gotd_client *client)
 273 13b2bc37 2022-10-23 stsp {
 274 13b2bc37 2022-10-23 stsp 	return client->repo_write != NULL;
 275 13b2bc37 2022-10-23 stsp }
 276 13b2bc37 2022-10-23 stsp 
 277 13b2bc37 2022-10-23 stsp static const struct got_error *
 278 13b2bc37 2022-10-23 stsp ensure_client_is_reading(struct gotd_client *client)
 279 13b2bc37 2022-10-23 stsp {
 280 13b2bc37 2022-10-23 stsp 	if (!client_is_reading(client)) {
 281 13b2bc37 2022-10-23 stsp 		return got_error_fmt(GOT_ERR_BAD_PACKET,
 282 13b2bc37 2022-10-23 stsp 		    "uid %d made a read-request but is not reading from "
 283 13b2bc37 2022-10-23 stsp 		    "a repository", client->euid);
 284 13b2bc37 2022-10-23 stsp 	}
 285 13b2bc37 2022-10-23 stsp 
 286 13b2bc37 2022-10-23 stsp 	return NULL;
 287 13b2bc37 2022-10-23 stsp }
 288 13b2bc37 2022-10-23 stsp 
 289 13b2bc37 2022-10-23 stsp static const struct got_error *
 290 13b2bc37 2022-10-23 stsp ensure_client_is_writing(struct gotd_client *client)
 291 13b2bc37 2022-10-23 stsp {
 292 13b2bc37 2022-10-23 stsp 	if (!client_is_writing(client)) {
 293 13b2bc37 2022-10-23 stsp 		return got_error_fmt(GOT_ERR_BAD_PACKET,
 294 13b2bc37 2022-10-23 stsp 		    "uid %d made a write-request but is not writing to "
 295 13b2bc37 2022-10-23 stsp 		    "a repository", client->euid);
 296 13b2bc37 2022-10-23 stsp 	}
 297 13b2bc37 2022-10-23 stsp 
 298 13b2bc37 2022-10-23 stsp 	return NULL;
 299 13b2bc37 2022-10-23 stsp }
 300 13b2bc37 2022-10-23 stsp 
 301 13b2bc37 2022-10-23 stsp static const struct got_error *
 302 13b2bc37 2022-10-23 stsp ensure_client_is_not_writing(struct gotd_client *client)
 303 13b2bc37 2022-10-23 stsp {
 304 13b2bc37 2022-10-23 stsp 	if (client_is_writing(client)) {
 305 13b2bc37 2022-10-23 stsp 		return got_error_fmt(GOT_ERR_BAD_PACKET,
 306 13b2bc37 2022-10-23 stsp 		    "uid %d made a read-request but is writing to "
 307 13b2bc37 2022-10-23 stsp 		    "a repository", client->euid);
 308 13b2bc37 2022-10-23 stsp 	}
 309 13b2bc37 2022-10-23 stsp 
 310 13b2bc37 2022-10-23 stsp 	return NULL;
 311 13b2bc37 2022-10-23 stsp }
 312 13b2bc37 2022-10-23 stsp 
 313 13b2bc37 2022-10-23 stsp static const struct got_error *
 314 13b2bc37 2022-10-23 stsp ensure_client_is_not_reading(struct gotd_client *client)
 315 13b2bc37 2022-10-23 stsp {
 316 13b2bc37 2022-10-23 stsp 	if (client_is_reading(client)) {
 317 13b2bc37 2022-10-23 stsp 		return got_error_fmt(GOT_ERR_BAD_PACKET,
 318 13b2bc37 2022-10-23 stsp 		    "uid %d made a write-request but is reading from "
 319 13b2bc37 2022-10-23 stsp 		    "a repository", client->euid);
 320 13b2bc37 2022-10-23 stsp 	}
 321 13b2bc37 2022-10-23 stsp 
 322 13b2bc37 2022-10-23 stsp 	return NULL;
 323 b50a2b46 2022-12-29 stsp }
 324 b50a2b46 2022-12-29 stsp 
 325 b50a2b46 2022-12-29 stsp static void
 326 5e25db14 2022-12-29 stsp wait_for_child(pid_t child_pid)
 327 b50a2b46 2022-12-29 stsp {
 328 b50a2b46 2022-12-29 stsp 	pid_t pid;
 329 b50a2b46 2022-12-29 stsp 	int status;
 330 b50a2b46 2022-12-29 stsp 
 331 5e25db14 2022-12-29 stsp 	log_debug("waiting for child PID %ld to terminate",
 332 5e25db14 2022-12-29 stsp 	    (long)child_pid);
 333 b50a2b46 2022-12-29 stsp 
 334 b50a2b46 2022-12-29 stsp 	do {
 335 5e25db14 2022-12-29 stsp 		pid = waitpid(child_pid, &status, WNOHANG);
 336 b50a2b46 2022-12-29 stsp 		if (pid == -1) {
 337 b50a2b46 2022-12-29 stsp 			if (errno != EINTR && errno != ECHILD)
 338 b50a2b46 2022-12-29 stsp 				fatal("wait");
 339 b50a2b46 2022-12-29 stsp 		} else if (WIFSIGNALED(status)) {
 340 b50a2b46 2022-12-29 stsp 			log_warnx("child PID %ld terminated; signal %d",
 341 b50a2b46 2022-12-29 stsp 			    (long)pid, WTERMSIG(status));
 342 7fdc3e58 2022-12-30 mark 		}
 343 b50a2b46 2022-12-29 stsp 	} while (pid != -1 || (pid == -1 && errno == EINTR));
 344 13b2bc37 2022-10-23 stsp }
 345 13b2bc37 2022-10-23 stsp 
 346 13b2bc37 2022-10-23 stsp static void
 347 5e25db14 2022-12-29 stsp kill_auth_proc(struct gotd_client *client)
 348 5e25db14 2022-12-29 stsp {
 349 5e25db14 2022-12-29 stsp 	struct gotd_child_proc *proc;
 350 5e25db14 2022-12-29 stsp 
 351 5e25db14 2022-12-29 stsp 	if (client->auth == NULL)
 352 5e25db14 2022-12-29 stsp 		return;
 353 5e25db14 2022-12-29 stsp 
 354 5e25db14 2022-12-29 stsp 	proc = client->auth;
 355 5e25db14 2022-12-29 stsp 	client->auth = NULL;
 356 5e25db14 2022-12-29 stsp 
 357 5e25db14 2022-12-29 stsp 	event_del(&proc->iev.ev);
 358 5e25db14 2022-12-29 stsp 	msgbuf_clear(&proc->iev.ibuf.w);
 359 5e25db14 2022-12-29 stsp 	close(proc->iev.ibuf.fd);
 360 5e25db14 2022-12-29 stsp 	kill_proc(proc, 0);
 361 5e25db14 2022-12-29 stsp 	wait_for_child(proc->pid);
 362 5e25db14 2022-12-29 stsp 	free(proc);
 363 5e25db14 2022-12-29 stsp }
 364 5e25db14 2022-12-29 stsp 
 365 5e25db14 2022-12-29 stsp static void
 366 13b2bc37 2022-10-23 stsp disconnect(struct gotd_client *client)
 367 13b2bc37 2022-10-23 stsp {
 368 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_disconnect idisconnect;
 369 13b2bc37 2022-10-23 stsp 	struct gotd_child_proc *proc = get_client_proc(client);
 370 b50a2b46 2022-12-29 stsp 	struct gotd_child_proc *listen_proc = &gotd.listen_proc;
 371 13b2bc37 2022-10-23 stsp 	uint64_t slot;
 372 13b2bc37 2022-10-23 stsp 
 373 13b2bc37 2022-10-23 stsp 	log_debug("uid %d: disconnecting", client->euid);
 374 5e25db14 2022-12-29 stsp 
 375 5e25db14 2022-12-29 stsp 	kill_auth_proc(client);
 376 13b2bc37 2022-10-23 stsp 
 377 13b2bc37 2022-10-23 stsp 	idisconnect.client_id = client->id;
 378 f1752522 2022-10-29 stsp 	if (proc) {
 379 f1752522 2022-10-29 stsp 		if (gotd_imsg_compose_event(&proc->iev,
 380 f1752522 2022-10-29 stsp 		    GOTD_IMSG_DISCONNECT, PROC_GOTD, -1,
 381 f1752522 2022-10-29 stsp 		    &idisconnect, sizeof(idisconnect)) == -1)
 382 f1752522 2022-10-29 stsp 			log_warn("imsg compose DISCONNECT");
 383 b50a2b46 2022-12-29 stsp 
 384 b50a2b46 2022-12-29 stsp 		msgbuf_clear(&proc->iev.ibuf.w);
 385 b50a2b46 2022-12-29 stsp 		close(proc->iev.ibuf.fd);
 386 b50a2b46 2022-12-29 stsp 		kill_proc(proc, 0);
 387 5e25db14 2022-12-29 stsp 		wait_for_child(proc->pid);
 388 b50a2b46 2022-12-29 stsp 		free(proc);
 389 b50a2b46 2022-12-29 stsp 		proc = NULL;
 390 f1752522 2022-10-29 stsp 	}
 391 d93ecf7d 2022-12-14 stsp 
 392 d93ecf7d 2022-12-14 stsp 	if (gotd_imsg_compose_event(&listen_proc->iev,
 393 d93ecf7d 2022-12-14 stsp 	    GOTD_IMSG_DISCONNECT, PROC_GOTD, -1,
 394 d93ecf7d 2022-12-14 stsp 	    &idisconnect, sizeof(idisconnect)) == -1)
 395 d93ecf7d 2022-12-14 stsp 		log_warn("imsg compose DISCONNECT");
 396 d93ecf7d 2022-12-14 stsp 
 397 13b2bc37 2022-10-23 stsp 	slot = client_hash(client->id) % nitems(gotd_clients);
 398 13b2bc37 2022-10-23 stsp 	STAILQ_REMOVE(&gotd_clients[slot], client, gotd_client, entry);
 399 13b2bc37 2022-10-23 stsp 	imsg_clear(&client->iev.ibuf);
 400 13b2bc37 2022-10-23 stsp 	event_del(&client->iev.ev);
 401 13b2bc37 2022-10-23 stsp 	evtimer_del(&client->tmo);
 402 13b2bc37 2022-10-23 stsp 	close(client->fd);
 403 13b2bc37 2022-10-23 stsp 	if (client->delta_cache_fd != -1)
 404 13b2bc37 2022-10-23 stsp 		close(client->delta_cache_fd);
 405 13b2bc37 2022-10-23 stsp 	if (client->packfile_path) {
 406 13b2bc37 2022-10-23 stsp 		if (unlink(client->packfile_path) == -1 && errno != ENOENT)
 407 13b2bc37 2022-10-23 stsp 			log_warn("unlink %s: ", client->packfile_path);
 408 13b2bc37 2022-10-23 stsp 		free(client->packfile_path);
 409 13b2bc37 2022-10-23 stsp 	}
 410 13b2bc37 2022-10-23 stsp 	if (client->packidx_path) {
 411 13b2bc37 2022-10-23 stsp 		if (unlink(client->packidx_path) == -1 && errno != ENOENT)
 412 13b2bc37 2022-10-23 stsp 			log_warn("unlink %s: ", client->packidx_path);
 413 13b2bc37 2022-10-23 stsp 		free(client->packidx_path);
 414 13b2bc37 2022-10-23 stsp 	}
 415 13b2bc37 2022-10-23 stsp 	free(client->capabilities);
 416 13b2bc37 2022-10-23 stsp 	free(client);
 417 13b2bc37 2022-10-23 stsp 	client_cnt--;
 418 13b2bc37 2022-10-23 stsp }
 419 13b2bc37 2022-10-23 stsp 
 420 13b2bc37 2022-10-23 stsp static void
 421 13b2bc37 2022-10-23 stsp disconnect_on_error(struct gotd_client *client, const struct got_error *err)
 422 13b2bc37 2022-10-23 stsp {
 423 13b2bc37 2022-10-23 stsp 	struct imsgbuf ibuf;
 424 13b2bc37 2022-10-23 stsp 
 425 13b2bc37 2022-10-23 stsp 	log_warnx("uid %d: %s", client->euid, err->msg);
 426 13b2bc37 2022-10-23 stsp 	if (err->code != GOT_ERR_EOF) {
 427 13b2bc37 2022-10-23 stsp 		imsg_init(&ibuf, client->fd);
 428 13b2bc37 2022-10-23 stsp 		gotd_imsg_send_error(&ibuf, 0, PROC_GOTD, err);
 429 13b2bc37 2022-10-23 stsp 		imsg_clear(&ibuf);
 430 13b2bc37 2022-10-23 stsp 	}
 431 13b2bc37 2022-10-23 stsp 	disconnect(client);
 432 f1752522 2022-10-29 stsp }
 433 f1752522 2022-10-29 stsp 
 434 f1752522 2022-10-29 stsp static const struct got_error *
 435 f1752522 2022-10-29 stsp send_repo_info(struct gotd_imsgev *iev, struct gotd_repo *repo)
 436 f1752522 2022-10-29 stsp {
 437 f1752522 2022-10-29 stsp 	const struct got_error *err = NULL;
 438 f1752522 2022-10-29 stsp 	struct gotd_imsg_info_repo irepo;
 439 f1752522 2022-10-29 stsp 
 440 f1752522 2022-10-29 stsp 	memset(&irepo, 0, sizeof(irepo));
 441 f1752522 2022-10-29 stsp 
 442 f1752522 2022-10-29 stsp 	if (strlcpy(irepo.repo_name, repo->name, sizeof(irepo.repo_name))
 443 f1752522 2022-10-29 stsp 	    >= sizeof(irepo.repo_name))
 444 f1752522 2022-10-29 stsp 		return got_error_msg(GOT_ERR_NO_SPACE, "repo name too long");
 445 f1752522 2022-10-29 stsp 	if (strlcpy(irepo.repo_path, repo->path, sizeof(irepo.repo_path))
 446 f1752522 2022-10-29 stsp 	    >= sizeof(irepo.repo_path))
 447 f1752522 2022-10-29 stsp 		return got_error_msg(GOT_ERR_NO_SPACE, "repo path too long");
 448 f1752522 2022-10-29 stsp 
 449 f1752522 2022-10-29 stsp 	if (gotd_imsg_compose_event(iev, GOTD_IMSG_INFO_REPO, PROC_GOTD, -1,
 450 f1752522 2022-10-29 stsp 	    &irepo, sizeof(irepo)) == -1) {
 451 f1752522 2022-10-29 stsp 		err = got_error_from_errno("imsg compose INFO_REPO");
 452 f1752522 2022-10-29 stsp 		if (err)
 453 f1752522 2022-10-29 stsp 			return err;
 454 f1752522 2022-10-29 stsp 	}
 455 f1752522 2022-10-29 stsp 
 456 f1752522 2022-10-29 stsp 	return NULL;
 457 13b2bc37 2022-10-23 stsp }
 458 13b2bc37 2022-10-23 stsp 
 459 f1752522 2022-10-29 stsp static const struct got_error *
 460 f1752522 2022-10-29 stsp send_capability(struct gotd_client_capability *capa, struct gotd_imsgev* iev)
 461 f1752522 2022-10-29 stsp {
 462 f1752522 2022-10-29 stsp 	const struct got_error *err = NULL;
 463 f1752522 2022-10-29 stsp 	struct gotd_imsg_capability icapa;
 464 f1752522 2022-10-29 stsp 	size_t len;
 465 f1752522 2022-10-29 stsp 	struct ibuf *wbuf;
 466 f1752522 2022-10-29 stsp 
 467 f1752522 2022-10-29 stsp 	memset(&icapa, 0, sizeof(icapa));
 468 f1752522 2022-10-29 stsp 
 469 f1752522 2022-10-29 stsp 	icapa.key_len = strlen(capa->key);
 470 f1752522 2022-10-29 stsp 	len = sizeof(icapa) + icapa.key_len;
 471 f1752522 2022-10-29 stsp 	if (capa->value) {
 472 f1752522 2022-10-29 stsp 		icapa.value_len = strlen(capa->value);
 473 f1752522 2022-10-29 stsp 		len += icapa.value_len;
 474 f1752522 2022-10-29 stsp 	}
 475 f1752522 2022-10-29 stsp 
 476 f1752522 2022-10-29 stsp 	wbuf = imsg_create(&iev->ibuf, GOTD_IMSG_CAPABILITY, 0, 0, len);
 477 f1752522 2022-10-29 stsp 	if (wbuf == NULL) {
 478 f1752522 2022-10-29 stsp 		err = got_error_from_errno("imsg_create CAPABILITY");
 479 f1752522 2022-10-29 stsp 		return err;
 480 f1752522 2022-10-29 stsp 	}
 481 f1752522 2022-10-29 stsp 
 482 f1752522 2022-10-29 stsp 	if (imsg_add(wbuf, &icapa, sizeof(icapa)) == -1)
 483 f1752522 2022-10-29 stsp 		return got_error_from_errno("imsg_add CAPABILITY");
 484 f1752522 2022-10-29 stsp 	if (imsg_add(wbuf, capa->key, icapa.key_len) == -1)
 485 f1752522 2022-10-29 stsp 		return got_error_from_errno("imsg_add CAPABILITY");
 486 f1752522 2022-10-29 stsp 	if (capa->value) {
 487 f1752522 2022-10-29 stsp 		if (imsg_add(wbuf, capa->value, icapa.value_len) == -1)
 488 f1752522 2022-10-29 stsp 			return got_error_from_errno("imsg_add CAPABILITY");
 489 f1752522 2022-10-29 stsp 	}
 490 f1752522 2022-10-29 stsp 
 491 f1752522 2022-10-29 stsp 	wbuf->fd = -1;
 492 f1752522 2022-10-29 stsp 	imsg_close(&iev->ibuf, wbuf);
 493 f1752522 2022-10-29 stsp 
 494 f1752522 2022-10-29 stsp 	gotd_imsg_event_add(iev);
 495 f1752522 2022-10-29 stsp 
 496 f1752522 2022-10-29 stsp 	return NULL;
 497 f1752522 2022-10-29 stsp }
 498 f1752522 2022-10-29 stsp 
 499 f1752522 2022-10-29 stsp static const struct got_error *
 500 f1752522 2022-10-29 stsp send_client_info(struct gotd_imsgev *iev, struct gotd_client *client)
 501 f1752522 2022-10-29 stsp {
 502 f1752522 2022-10-29 stsp 	const struct got_error *err = NULL;
 503 f1752522 2022-10-29 stsp 	struct gotd_imsg_info_client iclient;
 504 f1752522 2022-10-29 stsp 	struct gotd_child_proc *proc;
 505 f1752522 2022-10-29 stsp 	size_t i;
 506 f1752522 2022-10-29 stsp 
 507 f1752522 2022-10-29 stsp 	memset(&iclient, 0, sizeof(iclient));
 508 f1752522 2022-10-29 stsp 	iclient.euid = client->euid;
 509 f1752522 2022-10-29 stsp 	iclient.egid = client->egid;
 510 f1752522 2022-10-29 stsp 
 511 f1752522 2022-10-29 stsp 	proc = get_client_proc(client);
 512 f1752522 2022-10-29 stsp 	if (proc) {
 513 eec68231 2022-12-14 stsp 		if (strlcpy(iclient.repo_name, proc->repo_path,
 514 f1752522 2022-10-29 stsp 		    sizeof(iclient.repo_name)) >= sizeof(iclient.repo_name)) {
 515 f1752522 2022-10-29 stsp 			return got_error_msg(GOT_ERR_NO_SPACE,
 516 f1752522 2022-10-29 stsp 			    "repo name too long");
 517 f1752522 2022-10-29 stsp 		}
 518 f1752522 2022-10-29 stsp 		if (client_is_writing(client))
 519 f1752522 2022-10-29 stsp 			iclient.is_writing = 1;
 520 f1752522 2022-10-29 stsp 	}
 521 f1752522 2022-10-29 stsp 
 522 f1752522 2022-10-29 stsp 	iclient.state = client->state;
 523 f1752522 2022-10-29 stsp 	iclient.ncapabilities = client->ncapabilities;
 524 f1752522 2022-10-29 stsp 
 525 f1752522 2022-10-29 stsp 	if (gotd_imsg_compose_event(iev, GOTD_IMSG_INFO_CLIENT, PROC_GOTD, -1,
 526 f1752522 2022-10-29 stsp 	    &iclient, sizeof(iclient)) == -1) {
 527 f1752522 2022-10-29 stsp 		err = got_error_from_errno("imsg compose INFO_CLIENT");
 528 f1752522 2022-10-29 stsp 		if (err)
 529 f1752522 2022-10-29 stsp 			return err;
 530 f1752522 2022-10-29 stsp 	}
 531 f1752522 2022-10-29 stsp 
 532 f1752522 2022-10-29 stsp 	for (i = 0; i < client->ncapabilities; i++) {
 533 f1752522 2022-10-29 stsp 		struct gotd_client_capability *capa;
 534 f1752522 2022-10-29 stsp 		capa = &client->capabilities[i];
 535 f1752522 2022-10-29 stsp 		err = send_capability(capa, iev);
 536 f1752522 2022-10-29 stsp 		if (err)
 537 f1752522 2022-10-29 stsp 			return err;
 538 f1752522 2022-10-29 stsp 	}
 539 f1752522 2022-10-29 stsp 
 540 f1752522 2022-10-29 stsp 	return NULL;
 541 f1752522 2022-10-29 stsp }
 542 f1752522 2022-10-29 stsp 
 543 f1752522 2022-10-29 stsp static const struct got_error *
 544 f1752522 2022-10-29 stsp send_info(struct gotd_client *client)
 545 f1752522 2022-10-29 stsp {
 546 f1752522 2022-10-29 stsp 	const struct got_error *err = NULL;
 547 f1752522 2022-10-29 stsp 	struct gotd_imsg_info info;
 548 f1752522 2022-10-29 stsp 	uint64_t slot;
 549 f1752522 2022-10-29 stsp 	struct gotd_repo *repo;
 550 f1752522 2022-10-29 stsp 
 551 f1752522 2022-10-29 stsp 	info.pid = gotd.pid;
 552 f1752522 2022-10-29 stsp 	info.verbosity = gotd.verbosity;
 553 f1752522 2022-10-29 stsp 	info.nrepos = gotd.nrepos;
 554 f1752522 2022-10-29 stsp 	info.nclients = client_cnt - 1;
 555 f1752522 2022-10-29 stsp 
 556 f1752522 2022-10-29 stsp 	if (gotd_imsg_compose_event(&client->iev, GOTD_IMSG_INFO, PROC_GOTD, -1,
 557 f1752522 2022-10-29 stsp 	    &info, sizeof(info)) == -1) {
 558 f1752522 2022-10-29 stsp 		err = got_error_from_errno("imsg compose INFO");
 559 f1752522 2022-10-29 stsp 		if (err)
 560 f1752522 2022-10-29 stsp 			return err;
 561 f1752522 2022-10-29 stsp 	}
 562 f1752522 2022-10-29 stsp 
 563 f1752522 2022-10-29 stsp 	TAILQ_FOREACH(repo, &gotd.repos, entry) {
 564 f1752522 2022-10-29 stsp 		err = send_repo_info(&client->iev, repo);
 565 f1752522 2022-10-29 stsp 		if (err)
 566 f1752522 2022-10-29 stsp 			return err;
 567 f1752522 2022-10-29 stsp 	}
 568 f1752522 2022-10-29 stsp 
 569 f1752522 2022-10-29 stsp 	for (slot = 0; slot < nitems(gotd_clients); slot++) {
 570 f1752522 2022-10-29 stsp 		struct gotd_client *c;
 571 f1752522 2022-10-29 stsp 		STAILQ_FOREACH(c, &gotd_clients[slot], entry) {
 572 f1752522 2022-10-29 stsp 			if (c->id == client->id)
 573 f1752522 2022-10-29 stsp 				continue;
 574 f1752522 2022-10-29 stsp 			err = send_client_info(&client->iev, c);
 575 f1752522 2022-10-29 stsp 			if (err)
 576 f1752522 2022-10-29 stsp 				return err;
 577 f1752522 2022-10-29 stsp 		}
 578 f1752522 2022-10-29 stsp 	}
 579 f1752522 2022-10-29 stsp 
 580 f1752522 2022-10-29 stsp 	return NULL;
 581 f1752522 2022-10-29 stsp }
 582 f1752522 2022-10-29 stsp 
 583 f1752522 2022-10-29 stsp static const struct got_error *
 584 f1752522 2022-10-29 stsp stop_gotd(struct gotd_client *client)
 585 f1752522 2022-10-29 stsp {
 586 f1752522 2022-10-29 stsp 
 587 f1752522 2022-10-29 stsp 	if (client->euid != 0)
 588 f1752522 2022-10-29 stsp 		return got_error_set_errno(EPERM, "stop");
 589 f1752522 2022-10-29 stsp 
 590 f1752522 2022-10-29 stsp 	gotd_shutdown();
 591 f1752522 2022-10-29 stsp 	/* NOTREACHED */
 592 0ccf3acb 2022-11-16 stsp 	return NULL;
 593 0ccf3acb 2022-11-16 stsp }
 594 0ccf3acb 2022-11-16 stsp 
 595 0ccf3acb 2022-11-16 stsp static struct gotd_repo *
 596 0ccf3acb 2022-11-16 stsp find_repo_by_name(const char *repo_name)
 597 0ccf3acb 2022-11-16 stsp {
 598 0ccf3acb 2022-11-16 stsp 	struct gotd_repo *repo;
 599 0ccf3acb 2022-11-16 stsp 	size_t namelen;
 600 0ccf3acb 2022-11-16 stsp 
 601 0ccf3acb 2022-11-16 stsp 	TAILQ_FOREACH(repo, &gotd.repos, entry) {
 602 0ccf3acb 2022-11-16 stsp 		namelen = strlen(repo->name);
 603 0ccf3acb 2022-11-16 stsp 		if (strncmp(repo->name, repo_name, namelen) != 0)
 604 0ccf3acb 2022-11-16 stsp 			continue;
 605 0ccf3acb 2022-11-16 stsp 		if (repo_name[namelen] == '\0' ||
 606 0ccf3acb 2022-11-16 stsp 		    strcmp(&repo_name[namelen], ".git") == 0)
 607 0ccf3acb 2022-11-16 stsp 			return repo;
 608 13b2bc37 2022-10-23 stsp 	}
 609 13b2bc37 2022-10-23 stsp 
 610 13b2bc37 2022-10-23 stsp 	return NULL;
 611 13b2bc37 2022-10-23 stsp }
 612 13b2bc37 2022-10-23 stsp 
 613 13b2bc37 2022-10-23 stsp static const struct got_error *
 614 b50a2b46 2022-12-29 stsp start_client_session(struct gotd_client *client, struct imsg *imsg)
 615 13b2bc37 2022-10-23 stsp {
 616 13b2bc37 2022-10-23 stsp 	const struct got_error *err;
 617 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_list_refs ireq;
 618 0ccf3acb 2022-11-16 stsp 	struct gotd_repo *repo = NULL;
 619 13b2bc37 2022-10-23 stsp 	size_t datalen;
 620 13b2bc37 2022-10-23 stsp 
 621 13b2bc37 2022-10-23 stsp 	log_debug("list-refs request from uid %d", client->euid);
 622 13b2bc37 2022-10-23 stsp 
 623 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 624 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(ireq))
 625 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 626 13b2bc37 2022-10-23 stsp 
 627 13b2bc37 2022-10-23 stsp 	memcpy(&ireq, imsg->data, datalen);
 628 13b2bc37 2022-10-23 stsp 
 629 13b2bc37 2022-10-23 stsp 	if (ireq.client_is_reading) {
 630 13b2bc37 2022-10-23 stsp 		err = ensure_client_is_not_writing(client);
 631 13b2bc37 2022-10-23 stsp 		if (err)
 632 13b2bc37 2022-10-23 stsp 			return err;
 633 0ccf3acb 2022-11-16 stsp 		repo = find_repo_by_name(ireq.repo_name);
 634 0ccf3acb 2022-11-16 stsp 		if (repo == NULL)
 635 0ccf3acb 2022-11-16 stsp 			return got_error(GOT_ERR_NOT_GIT_REPO);
 636 5e25db14 2022-12-29 stsp 		err = start_auth_child(client, GOTD_AUTH_READ, repo,
 637 b50a2b46 2022-12-29 stsp 		    gotd.argv0, gotd.confpath, gotd.daemonize,
 638 b50a2b46 2022-12-29 stsp 		    gotd.verbosity);
 639 b50a2b46 2022-12-29 stsp 		if (err)
 640 b50a2b46 2022-12-29 stsp 			return err;
 641 13b2bc37 2022-10-23 stsp 	} else {
 642 13b2bc37 2022-10-23 stsp 		err = ensure_client_is_not_reading(client);
 643 0ccf3acb 2022-11-16 stsp 		if (err)
 644 0ccf3acb 2022-11-16 stsp 			return err;
 645 0ccf3acb 2022-11-16 stsp 		repo = find_repo_by_name(ireq.repo_name);
 646 0ccf3acb 2022-11-16 stsp 		if (repo == NULL)
 647 0ccf3acb 2022-11-16 stsp 			return got_error(GOT_ERR_NOT_GIT_REPO);
 648 5e25db14 2022-12-29 stsp 		err = start_auth_child(client,
 649 5e25db14 2022-12-29 stsp 		    GOTD_AUTH_READ | GOTD_AUTH_WRITE,
 650 5e25db14 2022-12-29 stsp 		    repo, gotd.argv0, gotd.confpath, gotd.daemonize,
 651 b50a2b46 2022-12-29 stsp 		    gotd.verbosity);
 652 b50a2b46 2022-12-29 stsp 		if (err)
 653 b50a2b46 2022-12-29 stsp 			return err;
 654 13b2bc37 2022-10-23 stsp 	}
 655 13b2bc37 2022-10-23 stsp 
 656 5e25db14 2022-12-29 stsp 	/* Flow continues upon authentication successs/failure or timeout. */
 657 13b2bc37 2022-10-23 stsp 	return NULL;
 658 13b2bc37 2022-10-23 stsp }
 659 13b2bc37 2022-10-23 stsp 
 660 13b2bc37 2022-10-23 stsp static const struct got_error *
 661 13b2bc37 2022-10-23 stsp forward_want(struct gotd_client *client, struct imsg *imsg)
 662 13b2bc37 2022-10-23 stsp {
 663 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_want ireq;
 664 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_want iwant;
 665 13b2bc37 2022-10-23 stsp 	size_t datalen;
 666 13b2bc37 2022-10-23 stsp 
 667 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 668 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(ireq))
 669 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 670 13b2bc37 2022-10-23 stsp 
 671 13b2bc37 2022-10-23 stsp 	memcpy(&ireq, imsg->data, datalen);
 672 13b2bc37 2022-10-23 stsp 
 673 13b2bc37 2022-10-23 stsp 	memset(&iwant, 0, sizeof(iwant));
 674 13b2bc37 2022-10-23 stsp 	memcpy(iwant.object_id, ireq.object_id, SHA1_DIGEST_LENGTH);
 675 13b2bc37 2022-10-23 stsp 	iwant.client_id = client->id;
 676 13b2bc37 2022-10-23 stsp 
 677 13b2bc37 2022-10-23 stsp 	if (gotd_imsg_compose_event(&client->repo_read->iev, GOTD_IMSG_WANT,
 678 13b2bc37 2022-10-23 stsp 	    PROC_GOTD, -1, &iwant, sizeof(iwant)) == -1)
 679 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("imsg compose WANT");
 680 13b2bc37 2022-10-23 stsp 
 681 13b2bc37 2022-10-23 stsp 	return NULL;
 682 13b2bc37 2022-10-23 stsp }
 683 13b2bc37 2022-10-23 stsp 
 684 13b2bc37 2022-10-23 stsp static const struct got_error *
 685 13b2bc37 2022-10-23 stsp forward_ref_update(struct gotd_client *client, struct imsg *imsg)
 686 13b2bc37 2022-10-23 stsp {
 687 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
 688 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_ref_update ireq;
 689 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_ref_update *iref = NULL;
 690 13b2bc37 2022-10-23 stsp 	size_t datalen;
 691 13b2bc37 2022-10-23 stsp 
 692 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 693 13b2bc37 2022-10-23 stsp 	if (datalen < sizeof(ireq))
 694 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 695 13b2bc37 2022-10-23 stsp 	memcpy(&ireq, imsg->data, sizeof(ireq));
 696 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(ireq) + ireq.name_len)
 697 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 698 13b2bc37 2022-10-23 stsp 
 699 13b2bc37 2022-10-23 stsp 	iref = malloc(datalen);
 700 13b2bc37 2022-10-23 stsp 	if (iref == NULL)
 701 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("malloc");
 702 13b2bc37 2022-10-23 stsp 	memcpy(iref, imsg->data, datalen);
 703 13b2bc37 2022-10-23 stsp 
 704 13b2bc37 2022-10-23 stsp 	iref->client_id = client->id;
 705 13b2bc37 2022-10-23 stsp 	if (gotd_imsg_compose_event(&client->repo_write->iev,
 706 13b2bc37 2022-10-23 stsp 	    GOTD_IMSG_REF_UPDATE, PROC_GOTD, -1, iref, datalen) == -1)
 707 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg compose REF_UPDATE");
 708 13b2bc37 2022-10-23 stsp 	free(iref);
 709 13b2bc37 2022-10-23 stsp 	return err;
 710 13b2bc37 2022-10-23 stsp }
 711 13b2bc37 2022-10-23 stsp 
 712 13b2bc37 2022-10-23 stsp static const struct got_error *
 713 13b2bc37 2022-10-23 stsp forward_have(struct gotd_client *client, struct imsg *imsg)
 714 13b2bc37 2022-10-23 stsp {
 715 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_have ireq;
 716 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_have ihave;
 717 13b2bc37 2022-10-23 stsp 	size_t datalen;
 718 13b2bc37 2022-10-23 stsp 
 719 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 720 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(ireq))
 721 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 722 13b2bc37 2022-10-23 stsp 
 723 13b2bc37 2022-10-23 stsp 	memcpy(&ireq, imsg->data, datalen);
 724 13b2bc37 2022-10-23 stsp 
 725 13b2bc37 2022-10-23 stsp 	memset(&ihave, 0, sizeof(ihave));
 726 13b2bc37 2022-10-23 stsp 	memcpy(ihave.object_id, ireq.object_id, SHA1_DIGEST_LENGTH);
 727 13b2bc37 2022-10-23 stsp 	ihave.client_id = client->id;
 728 13b2bc37 2022-10-23 stsp 
 729 13b2bc37 2022-10-23 stsp 	if (gotd_imsg_compose_event(&client->repo_read->iev, GOTD_IMSG_HAVE,
 730 13b2bc37 2022-10-23 stsp 	    PROC_GOTD, -1, &ihave, sizeof(ihave)) == -1)
 731 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("imsg compose HAVE");
 732 13b2bc37 2022-10-23 stsp 
 733 13b2bc37 2022-10-23 stsp 	return NULL;
 734 13b2bc37 2022-10-23 stsp }
 735 13b2bc37 2022-10-23 stsp 
 736 13b2bc37 2022-10-23 stsp static int
 737 13b2bc37 2022-10-23 stsp client_has_capability(struct gotd_client *client, const char *capastr)
 738 13b2bc37 2022-10-23 stsp {
 739 13b2bc37 2022-10-23 stsp 	struct gotd_client_capability *capa;
 740 13b2bc37 2022-10-23 stsp 	size_t i;
 741 13b2bc37 2022-10-23 stsp 
 742 13b2bc37 2022-10-23 stsp 	if (client->ncapabilities == 0)
 743 13b2bc37 2022-10-23 stsp 		return 0;
 744 13b2bc37 2022-10-23 stsp 
 745 13b2bc37 2022-10-23 stsp 	for (i = 0; i < client->ncapabilities; i++) {
 746 13b2bc37 2022-10-23 stsp 		capa = &client->capabilities[i];
 747 13b2bc37 2022-10-23 stsp 		if (strcmp(capa->key, capastr) == 0)
 748 13b2bc37 2022-10-23 stsp 			return 1;
 749 13b2bc37 2022-10-23 stsp 	}
 750 13b2bc37 2022-10-23 stsp 
 751 13b2bc37 2022-10-23 stsp 	return 0;
 752 13b2bc37 2022-10-23 stsp }
 753 13b2bc37 2022-10-23 stsp 
 754 13b2bc37 2022-10-23 stsp static const struct got_error *
 755 13b2bc37 2022-10-23 stsp recv_capabilities(struct gotd_client *client, struct imsg *imsg)
 756 13b2bc37 2022-10-23 stsp {
 757 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_capabilities icapas;
 758 13b2bc37 2022-10-23 stsp 	size_t datalen;
 759 13b2bc37 2022-10-23 stsp 
 760 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 761 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(icapas))
 762 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 763 13b2bc37 2022-10-23 stsp 	memcpy(&icapas, imsg->data, sizeof(icapas));
 764 13b2bc37 2022-10-23 stsp 
 765 13b2bc37 2022-10-23 stsp 	client->ncapa_alloc = icapas.ncapabilities;
 766 13b2bc37 2022-10-23 stsp 	client->capabilities = calloc(client->ncapa_alloc,
 767 13b2bc37 2022-10-23 stsp 	    sizeof(*client->capabilities));
 768 13b2bc37 2022-10-23 stsp 	if (client->capabilities == NULL) {
 769 13b2bc37 2022-10-23 stsp 		client->ncapa_alloc = 0;
 770 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("calloc");
 771 13b2bc37 2022-10-23 stsp 	}
 772 13b2bc37 2022-10-23 stsp 
 773 13b2bc37 2022-10-23 stsp 	log_debug("expecting %zu capabilities from uid %d",
 774 13b2bc37 2022-10-23 stsp 	    client->ncapa_alloc, client->euid);
 775 13b2bc37 2022-10-23 stsp 	return NULL;
 776 13b2bc37 2022-10-23 stsp }
 777 13b2bc37 2022-10-23 stsp 
 778 13b2bc37 2022-10-23 stsp static const struct got_error *
 779 13b2bc37 2022-10-23 stsp recv_capability(struct gotd_client *client, struct imsg *imsg)
 780 13b2bc37 2022-10-23 stsp {
 781 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_capability icapa;
 782 13b2bc37 2022-10-23 stsp 	struct gotd_client_capability *capa;
 783 13b2bc37 2022-10-23 stsp 	size_t datalen;
 784 13b2bc37 2022-10-23 stsp 	char *key, *value = NULL;
 785 13b2bc37 2022-10-23 stsp 
 786 13b2bc37 2022-10-23 stsp 	if (client->capabilities == NULL ||
 787 13b2bc37 2022-10-23 stsp 	    client->ncapabilities >= client->ncapa_alloc) {
 788 13b2bc37 2022-10-23 stsp 		return got_error_msg(GOT_ERR_BAD_REQUEST,
 789 13b2bc37 2022-10-23 stsp 		    "unexpected capability received");
 790 13b2bc37 2022-10-23 stsp 	}
 791 13b2bc37 2022-10-23 stsp 
 792 13b2bc37 2022-10-23 stsp 	memset(&icapa, 0, sizeof(icapa));
 793 13b2bc37 2022-10-23 stsp 
 794 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 795 13b2bc37 2022-10-23 stsp 	if (datalen < sizeof(icapa))
 796 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 797 13b2bc37 2022-10-23 stsp 	memcpy(&icapa, imsg->data, sizeof(icapa));
 798 13b2bc37 2022-10-23 stsp 
 799 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(icapa) + icapa.key_len + icapa.value_len)
 800 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 801 13b2bc37 2022-10-23 stsp 
 802 13b2bc37 2022-10-23 stsp 	key = malloc(icapa.key_len + 1);
 803 13b2bc37 2022-10-23 stsp 	if (key == NULL)
 804 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("malloc");
 805 13b2bc37 2022-10-23 stsp 	if (icapa.value_len > 0) {
 806 13b2bc37 2022-10-23 stsp 		value = malloc(icapa.value_len + 1);
 807 13b2bc37 2022-10-23 stsp 		if (value == NULL) {
 808 13b2bc37 2022-10-23 stsp 			free(key);
 809 13b2bc37 2022-10-23 stsp 			return got_error_from_errno("malloc");
 810 13b2bc37 2022-10-23 stsp 		}
 811 13b2bc37 2022-10-23 stsp 	}
 812 13b2bc37 2022-10-23 stsp 
 813 13b2bc37 2022-10-23 stsp 	memcpy(key, imsg->data + sizeof(icapa), icapa.key_len);
 814 13b2bc37 2022-10-23 stsp 	key[icapa.key_len] = '\0';
 815 13b2bc37 2022-10-23 stsp 	if (value) {
 816 13b2bc37 2022-10-23 stsp 		memcpy(value, imsg->data + sizeof(icapa) + icapa.key_len,
 817 13b2bc37 2022-10-23 stsp 		    icapa.value_len);
 818 13b2bc37 2022-10-23 stsp 		value[icapa.value_len] = '\0';
 819 13b2bc37 2022-10-23 stsp 	}
 820 13b2bc37 2022-10-23 stsp 
 821 13b2bc37 2022-10-23 stsp 	capa = &client->capabilities[client->ncapabilities++];
 822 13b2bc37 2022-10-23 stsp 	capa->key = key;
 823 13b2bc37 2022-10-23 stsp 	capa->value = value;
 824 13b2bc37 2022-10-23 stsp 
 825 13b2bc37 2022-10-23 stsp 	if (value)
 826 13b2bc37 2022-10-23 stsp 		log_debug("uid %d: capability %s=%s", client->euid, key, value);
 827 13b2bc37 2022-10-23 stsp 	else
 828 13b2bc37 2022-10-23 stsp 		log_debug("uid %d: capability %s", client->euid, key);
 829 13b2bc37 2022-10-23 stsp 
 830 13b2bc37 2022-10-23 stsp 	return NULL;
 831 13b2bc37 2022-10-23 stsp }
 832 13b2bc37 2022-10-23 stsp 
 833 13b2bc37 2022-10-23 stsp static const struct got_error *
 834 13b2bc37 2022-10-23 stsp send_packfile(struct gotd_client *client)
 835 13b2bc37 2022-10-23 stsp {
 836 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
 837 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_send_packfile ipack;
 838 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_packfile_pipe ipipe;
 839 13b2bc37 2022-10-23 stsp 	int pipe[2];
 840 13b2bc37 2022-10-23 stsp 
 841 13b2bc37 2022-10-23 stsp 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe) == -1)
 842 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("socketpair");
 843 13b2bc37 2022-10-23 stsp 
 844 13b2bc37 2022-10-23 stsp 	memset(&ipack, 0, sizeof(ipack));
 845 13b2bc37 2022-10-23 stsp 	memset(&ipipe, 0, sizeof(ipipe));
 846 13b2bc37 2022-10-23 stsp 
 847 13b2bc37 2022-10-23 stsp 	ipack.client_id = client->id;
 848 13b2bc37 2022-10-23 stsp 	if (client_has_capability(client, GOT_CAPA_SIDE_BAND_64K))
 849 13b2bc37 2022-10-23 stsp 		ipack.report_progress = 1;
 850 13b2bc37 2022-10-23 stsp 
 851 13b2bc37 2022-10-23 stsp 	client->delta_cache_fd = got_opentempfd();
 852 13b2bc37 2022-10-23 stsp 	if (client->delta_cache_fd == -1)
 853 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("got_opentempfd");
 854 13b2bc37 2022-10-23 stsp 
 855 13b2bc37 2022-10-23 stsp 	if (gotd_imsg_compose_event(&client->repo_read->iev,
 856 13b2bc37 2022-10-23 stsp 	    GOTD_IMSG_SEND_PACKFILE, PROC_GOTD, client->delta_cache_fd,
 857 13b2bc37 2022-10-23 stsp 	    &ipack, sizeof(ipack)) == -1) {
 858 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg compose SEND_PACKFILE");
 859 13b2bc37 2022-10-23 stsp 		close(pipe[0]);
 860 13b2bc37 2022-10-23 stsp 		close(pipe[1]);
 861 13b2bc37 2022-10-23 stsp 		return err;
 862 13b2bc37 2022-10-23 stsp 	}
 863 13b2bc37 2022-10-23 stsp 
 864 13b2bc37 2022-10-23 stsp 	ipipe.client_id = client->id;
 865 13b2bc37 2022-10-23 stsp 
 866 86769de8 2022-10-28 stsp 	/* Send pack pipe end 0 to repo_read. */
 867 13b2bc37 2022-10-23 stsp 	if (gotd_imsg_compose_event(&client->repo_read->iev,
 868 13b2bc37 2022-10-23 stsp 	    GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD, pipe[0],
 869 13b2bc37 2022-10-23 stsp 	        &ipipe, sizeof(ipipe)) == -1) {
 870 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg compose PACKFILE_PIPE");
 871 13b2bc37 2022-10-23 stsp 		close(pipe[1]);
 872 13b2bc37 2022-10-23 stsp 		return err;
 873 13b2bc37 2022-10-23 stsp 	}
 874 13b2bc37 2022-10-23 stsp 
 875 86769de8 2022-10-28 stsp 	/* Send pack pipe end 1 to gotsh(1) (expects just an fd, no data). */
 876 86769de8 2022-10-28 stsp 	if (gotd_imsg_compose_event(&client->iev,
 877 86769de8 2022-10-28 stsp 	    GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD, pipe[1], NULL, 0) == -1)
 878 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg compose PACKFILE_PIPE");
 879 13b2bc37 2022-10-23 stsp 
 880 13b2bc37 2022-10-23 stsp 	return err;
 881 13b2bc37 2022-10-23 stsp }
 882 13b2bc37 2022-10-23 stsp 
 883 13b2bc37 2022-10-23 stsp static const struct got_error *
 884 13b2bc37 2022-10-23 stsp recv_packfile(struct gotd_client *client)
 885 13b2bc37 2022-10-23 stsp {
 886 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
 887 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_recv_packfile ipack;
 888 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_packfile_pipe ipipe;
 889 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_packidx_file ifile;
 890 13b2bc37 2022-10-23 stsp 	char *basepath = NULL, *pack_path = NULL, *idx_path = NULL;
 891 13b2bc37 2022-10-23 stsp 	int packfd = -1, idxfd = -1;
 892 13b2bc37 2022-10-23 stsp 	int pipe[2] = { -1, -1 };
 893 13b2bc37 2022-10-23 stsp 
 894 13b2bc37 2022-10-23 stsp 	if (client->packfile_path) {
 895 13b2bc37 2022-10-23 stsp 		return got_error_fmt(GOT_ERR_PRIVSEP_MSG,
 896 13b2bc37 2022-10-23 stsp 		    "uid %d already has a pack file", client->euid);
 897 13b2bc37 2022-10-23 stsp 	}
 898 13b2bc37 2022-10-23 stsp 
 899 13b2bc37 2022-10-23 stsp 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe) == -1)
 900 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("socketpair");
 901 13b2bc37 2022-10-23 stsp 
 902 13b2bc37 2022-10-23 stsp 	memset(&ipipe, 0, sizeof(ipipe));
 903 13b2bc37 2022-10-23 stsp 	ipipe.client_id = client->id;
 904 13b2bc37 2022-10-23 stsp 
 905 7fec5f4a 2022-10-28 stsp 	/* Send pack pipe end 0 to repo_write. */
 906 13b2bc37 2022-10-23 stsp 	if (gotd_imsg_compose_event(&client->repo_write->iev,
 907 13b2bc37 2022-10-23 stsp 	    GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD, pipe[0],
 908 13b2bc37 2022-10-23 stsp 	        &ipipe, sizeof(ipipe)) == -1) {
 909 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg compose PACKFILE_PIPE");
 910 13b2bc37 2022-10-23 stsp 		pipe[0] = -1;
 911 13b2bc37 2022-10-23 stsp 		goto done;
 912 13b2bc37 2022-10-23 stsp 	}
 913 13b2bc37 2022-10-23 stsp 	pipe[0] = -1;
 914 13b2bc37 2022-10-23 stsp 
 915 7fec5f4a 2022-10-28 stsp 	/* Send pack pipe end 1 to gotsh(1) (expects just an fd, no data). */
 916 7fec5f4a 2022-10-28 stsp 	if (gotd_imsg_compose_event(&client->iev,
 917 7fec5f4a 2022-10-28 stsp 	    GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD, pipe[1], NULL, 0) == -1)
 918 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg compose PACKFILE_PIPE");
 919 13b2bc37 2022-10-23 stsp 	pipe[1] = -1;
 920 13b2bc37 2022-10-23 stsp 
 921 13b2bc37 2022-10-23 stsp 	if (asprintf(&basepath, "%s/%s/receiving-from-uid-%d.pack",
 922 eec68231 2022-12-14 stsp 	    client->repo_write->repo_path, GOT_OBJECTS_PACK_DIR,
 923 13b2bc37 2022-10-23 stsp 	    client->euid) == -1) {
 924 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("asprintf");
 925 13b2bc37 2022-10-23 stsp 		goto done;
 926 13b2bc37 2022-10-23 stsp 	}
 927 13b2bc37 2022-10-23 stsp 
 928 b90054ed 2022-11-01 stsp 	err = got_opentemp_named_fd(&pack_path, &packfd, basepath, "");
 929 13b2bc37 2022-10-23 stsp 	if (err)
 930 13b2bc37 2022-10-23 stsp 		goto done;
 931 13b2bc37 2022-10-23 stsp 
 932 13b2bc37 2022-10-23 stsp 	free(basepath);
 933 13b2bc37 2022-10-23 stsp 	if (asprintf(&basepath, "%s/%s/receiving-from-uid-%d.idx",
 934 eec68231 2022-12-14 stsp 	    client->repo_write->repo_path, GOT_OBJECTS_PACK_DIR,
 935 13b2bc37 2022-10-23 stsp 	    client->euid) == -1) {
 936 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("asprintf");
 937 13b2bc37 2022-10-23 stsp 		basepath = NULL;
 938 13b2bc37 2022-10-23 stsp 		goto done;
 939 13b2bc37 2022-10-23 stsp 	}
 940 b90054ed 2022-11-01 stsp 	err = got_opentemp_named_fd(&idx_path, &idxfd, basepath, "");
 941 13b2bc37 2022-10-23 stsp 	if (err)
 942 13b2bc37 2022-10-23 stsp 		goto done;
 943 13b2bc37 2022-10-23 stsp 
 944 13b2bc37 2022-10-23 stsp 	memset(&ifile, 0, sizeof(ifile));
 945 13b2bc37 2022-10-23 stsp 	ifile.client_id = client->id;
 946 13b2bc37 2022-10-23 stsp 	if (gotd_imsg_compose_event(&client->repo_write->iev,
 947 13b2bc37 2022-10-23 stsp 	    GOTD_IMSG_PACKIDX_FILE, PROC_GOTD, idxfd,
 948 13b2bc37 2022-10-23 stsp 	    &ifile, sizeof(ifile)) == -1) {
 949 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg compose PACKIDX_FILE");
 950 13b2bc37 2022-10-23 stsp 		idxfd = -1;
 951 13b2bc37 2022-10-23 stsp 		goto done;
 952 13b2bc37 2022-10-23 stsp 	}
 953 13b2bc37 2022-10-23 stsp 	idxfd = -1;
 954 13b2bc37 2022-10-23 stsp 
 955 13b2bc37 2022-10-23 stsp 	memset(&ipack, 0, sizeof(ipack));
 956 13b2bc37 2022-10-23 stsp 	ipack.client_id = client->id;
 957 13b2bc37 2022-10-23 stsp 	if (client_has_capability(client, GOT_CAPA_REPORT_STATUS))
 958 13b2bc37 2022-10-23 stsp 		ipack.report_status = 1;
 959 13b2bc37 2022-10-23 stsp 
 960 13b2bc37 2022-10-23 stsp 	if (gotd_imsg_compose_event(&client->repo_write->iev,
 961 13b2bc37 2022-10-23 stsp 	    GOTD_IMSG_RECV_PACKFILE, PROC_GOTD, packfd,
 962 13b2bc37 2022-10-23 stsp 	    &ipack, sizeof(ipack)) == -1) {
 963 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg compose RECV_PACKFILE");
 964 13b2bc37 2022-10-23 stsp 		packfd = -1;
 965 13b2bc37 2022-10-23 stsp 		goto done;
 966 13b2bc37 2022-10-23 stsp 	}
 967 13b2bc37 2022-10-23 stsp 	packfd = -1;
 968 13b2bc37 2022-10-23 stsp 
 969 13b2bc37 2022-10-23 stsp done:
 970 13b2bc37 2022-10-23 stsp 	free(basepath);
 971 13b2bc37 2022-10-23 stsp 	if (pipe[0] != -1 && close(pipe[0]) == -1 && err == NULL)
 972 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("close");
 973 13b2bc37 2022-10-23 stsp 	if (pipe[1] != -1 && close(pipe[1]) == -1 && err == NULL)
 974 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("close");
 975 13b2bc37 2022-10-23 stsp 	if (packfd != -1 && close(packfd) == -1 && err == NULL)
 976 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("close");
 977 13b2bc37 2022-10-23 stsp 	if (idxfd != -1 && close(idxfd) == -1 && err == NULL)
 978 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("close");
 979 13b2bc37 2022-10-23 stsp 	if (err) {
 980 13b2bc37 2022-10-23 stsp 		free(pack_path);
 981 13b2bc37 2022-10-23 stsp 		free(idx_path);
 982 13b2bc37 2022-10-23 stsp 	} else {
 983 13b2bc37 2022-10-23 stsp 		client->packfile_path = pack_path;
 984 13b2bc37 2022-10-23 stsp 		client->packidx_path = idx_path;
 985 13b2bc37 2022-10-23 stsp 	}
 986 13b2bc37 2022-10-23 stsp 	return err;
 987 13b2bc37 2022-10-23 stsp }
 988 13b2bc37 2022-10-23 stsp 
 989 13b2bc37 2022-10-23 stsp static void
 990 13b2bc37 2022-10-23 stsp gotd_request(int fd, short events, void *arg)
 991 13b2bc37 2022-10-23 stsp {
 992 13b2bc37 2022-10-23 stsp 	struct gotd_imsgev *iev = arg;
 993 13b2bc37 2022-10-23 stsp 	struct imsgbuf *ibuf = &iev->ibuf;
 994 13b2bc37 2022-10-23 stsp 	struct gotd_client *client = iev->handler_arg;
 995 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
 996 13b2bc37 2022-10-23 stsp 	struct imsg imsg;
 997 13b2bc37 2022-10-23 stsp 	ssize_t n;
 998 13b2bc37 2022-10-23 stsp 
 999 13b2bc37 2022-10-23 stsp 	if (events & EV_WRITE) {
1000 13b2bc37 2022-10-23 stsp 		while (ibuf->w.queued) {
1001 13b2bc37 2022-10-23 stsp 			n = msgbuf_write(&ibuf->w);
1002 13b2bc37 2022-10-23 stsp 			if (n == -1 && errno == EPIPE) {
1003 13b2bc37 2022-10-23 stsp 				/*
1004 13b2bc37 2022-10-23 stsp 				 * The client has closed its socket.
1005 13b2bc37 2022-10-23 stsp 				 * This can happen when Git clients are
1006 13b2bc37 2022-10-23 stsp 				 * done sending pack file data.
1007 77d0cae1 2022-12-30 op 				 */
1008 13b2bc37 2022-10-23 stsp 				msgbuf_clear(&ibuf->w);
1009 13b2bc37 2022-10-23 stsp 				continue;
1010 13b2bc37 2022-10-23 stsp 			} else if (n == -1 && errno != EAGAIN) {
1011 13b2bc37 2022-10-23 stsp 				err = got_error_from_errno("imsg_flush");
1012 13b2bc37 2022-10-23 stsp 				disconnect_on_error(client, err);
1013 13b2bc37 2022-10-23 stsp 				return;
1014 13b2bc37 2022-10-23 stsp 			}
1015 13b2bc37 2022-10-23 stsp 			if (n == 0) {
1016 13b2bc37 2022-10-23 stsp 				/* Connection closed. */
1017 13b2bc37 2022-10-23 stsp 				err = got_error(GOT_ERR_EOF);
1018 13b2bc37 2022-10-23 stsp 				disconnect_on_error(client, err);
1019 13b2bc37 2022-10-23 stsp 				return;
1020 13b2bc37 2022-10-23 stsp 			}
1021 13b2bc37 2022-10-23 stsp 		}
1022 f1752522 2022-10-29 stsp 
1023 f1752522 2022-10-29 stsp 		/* Disconnect gotctl(8) now that messages have been sent. */
1024 f1752522 2022-10-29 stsp 		if (!client_is_reading(client) && !client_is_writing(client)) {
1025 f1752522 2022-10-29 stsp 			disconnect(client);
1026 f1752522 2022-10-29 stsp 			return;
1027 f1752522 2022-10-29 stsp 		}
1028 13b2bc37 2022-10-23 stsp 	}
1029 13b2bc37 2022-10-23 stsp 
1030 13b2bc37 2022-10-23 stsp 	if ((events & EV_READ) == 0)
1031 13b2bc37 2022-10-23 stsp 		return;
1032 13b2bc37 2022-10-23 stsp 
1033 13b2bc37 2022-10-23 stsp 	memset(&imsg, 0, sizeof(imsg));
1034 13b2bc37 2022-10-23 stsp 
1035 13b2bc37 2022-10-23 stsp 	while (err == NULL) {
1036 13b2bc37 2022-10-23 stsp 		err = gotd_imsg_recv(&imsg, ibuf, 0);
1037 13b2bc37 2022-10-23 stsp 		if (err) {
1038 13b2bc37 2022-10-23 stsp 			if (err->code == GOT_ERR_PRIVSEP_READ)
1039 13b2bc37 2022-10-23 stsp 				err = NULL;
1040 13b2bc37 2022-10-23 stsp 			break;
1041 13b2bc37 2022-10-23 stsp 		}
1042 13b2bc37 2022-10-23 stsp 
1043 13b2bc37 2022-10-23 stsp 		evtimer_del(&client->tmo);
1044 13b2bc37 2022-10-23 stsp 
1045 13b2bc37 2022-10-23 stsp 		switch (imsg.hdr.type) {
1046 f1752522 2022-10-29 stsp 		case GOTD_IMSG_INFO:
1047 f1752522 2022-10-29 stsp 			err = send_info(client);
1048 f1752522 2022-10-29 stsp 			break;
1049 f1752522 2022-10-29 stsp 		case GOTD_IMSG_STOP:
1050 f1752522 2022-10-29 stsp 			err = stop_gotd(client);
1051 f1752522 2022-10-29 stsp 			break;
1052 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_LIST_REFS:
1053 13b2bc37 2022-10-23 stsp 			if (client->state != GOTD_STATE_EXPECT_LIST_REFS) {
1054 13b2bc37 2022-10-23 stsp 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1055 13b2bc37 2022-10-23 stsp 				    "unexpected list-refs request received");
1056 13b2bc37 2022-10-23 stsp 				break;
1057 13b2bc37 2022-10-23 stsp 			}
1058 b50a2b46 2022-12-29 stsp 			err = start_client_session(client, &imsg);
1059 13b2bc37 2022-10-23 stsp 			if (err)
1060 13b2bc37 2022-10-23 stsp 				break;
1061 13b2bc37 2022-10-23 stsp 			break;
1062 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_CAPABILITIES:
1063 13b2bc37 2022-10-23 stsp 			if (client->state != GOTD_STATE_EXPECT_CAPABILITIES) {
1064 13b2bc37 2022-10-23 stsp 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1065 13b2bc37 2022-10-23 stsp 				    "unexpected capabilities received");
1066 13b2bc37 2022-10-23 stsp 				break;
1067 13b2bc37 2022-10-23 stsp 			}
1068 13b2bc37 2022-10-23 stsp 			log_debug("receiving capabilities from uid %d",
1069 13b2bc37 2022-10-23 stsp 			    client->euid);
1070 13b2bc37 2022-10-23 stsp 			err = recv_capabilities(client, &imsg);
1071 13b2bc37 2022-10-23 stsp 			break;
1072 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_CAPABILITY:
1073 13b2bc37 2022-10-23 stsp 			if (client->state != GOTD_STATE_EXPECT_CAPABILITIES) {
1074 13b2bc37 2022-10-23 stsp 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1075 13b2bc37 2022-10-23 stsp 				    "unexpected capability received");
1076 13b2bc37 2022-10-23 stsp 				break;
1077 13b2bc37 2022-10-23 stsp 			}
1078 13b2bc37 2022-10-23 stsp 			err = recv_capability(client, &imsg);
1079 13b2bc37 2022-10-23 stsp 			if (err || client->ncapabilities < client->ncapa_alloc)
1080 13b2bc37 2022-10-23 stsp 				break;
1081 13b2bc37 2022-10-23 stsp 			if (client_is_reading(client)) {
1082 13b2bc37 2022-10-23 stsp 				client->state = GOTD_STATE_EXPECT_WANT;
1083 13b2bc37 2022-10-23 stsp 				log_debug("uid %d: expecting want-lines",
1084 13b2bc37 2022-10-23 stsp 				    client->euid);
1085 13b2bc37 2022-10-23 stsp 			} else if (client_is_writing(client)) {
1086 13b2bc37 2022-10-23 stsp 				client->state = GOTD_STATE_EXPECT_REF_UPDATE;
1087 13b2bc37 2022-10-23 stsp 				log_debug("uid %d: expecting ref-update-lines",
1088 13b2bc37 2022-10-23 stsp 				    client->euid);
1089 13b2bc37 2022-10-23 stsp 			} else
1090 13b2bc37 2022-10-23 stsp 				fatalx("client %d is both reading and writing",
1091 13b2bc37 2022-10-23 stsp 				    client->euid);
1092 13b2bc37 2022-10-23 stsp 			break;
1093 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_WANT:
1094 13b2bc37 2022-10-23 stsp 			if (client->state != GOTD_STATE_EXPECT_WANT) {
1095 13b2bc37 2022-10-23 stsp 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1096 13b2bc37 2022-10-23 stsp 				    "unexpected want-line received");
1097 13b2bc37 2022-10-23 stsp 				break;
1098 13b2bc37 2022-10-23 stsp 			}
1099 13b2bc37 2022-10-23 stsp 			log_debug("received want-line from uid %d",
1100 13b2bc37 2022-10-23 stsp 			    client->euid);
1101 13b2bc37 2022-10-23 stsp 			err = ensure_client_is_reading(client);
1102 13b2bc37 2022-10-23 stsp 			if (err)
1103 13b2bc37 2022-10-23 stsp 				break;
1104 13b2bc37 2022-10-23 stsp 			err = forward_want(client, &imsg);
1105 13b2bc37 2022-10-23 stsp 			break;
1106 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_REF_UPDATE:
1107 13b2bc37 2022-10-23 stsp 			if (client->state != GOTD_STATE_EXPECT_REF_UPDATE) {
1108 13b2bc37 2022-10-23 stsp 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1109 13b2bc37 2022-10-23 stsp 				    "unexpected ref-update-line received");
1110 13b2bc37 2022-10-23 stsp 				break;
1111 13b2bc37 2022-10-23 stsp 			}
1112 13b2bc37 2022-10-23 stsp 			log_debug("received ref-update-line from uid %d",
1113 13b2bc37 2022-10-23 stsp 			    client->euid);
1114 13b2bc37 2022-10-23 stsp 			err = ensure_client_is_writing(client);
1115 13b2bc37 2022-10-23 stsp 			if (err)
1116 13b2bc37 2022-10-23 stsp 				break;
1117 13b2bc37 2022-10-23 stsp 			err = forward_ref_update(client, &imsg);
1118 13b2bc37 2022-10-23 stsp 			if (err)
1119 13b2bc37 2022-10-23 stsp 				break;
1120 13b2bc37 2022-10-23 stsp 			client->state = GOTD_STATE_EXPECT_MORE_REF_UPDATES;
1121 13b2bc37 2022-10-23 stsp 			break;
1122 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_HAVE:
1123 13b2bc37 2022-10-23 stsp 			if (client->state != GOTD_STATE_EXPECT_HAVE) {
1124 13b2bc37 2022-10-23 stsp 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1125 13b2bc37 2022-10-23 stsp 				    "unexpected have-line received");
1126 13b2bc37 2022-10-23 stsp 				break;
1127 13b2bc37 2022-10-23 stsp 			}
1128 13b2bc37 2022-10-23 stsp 			log_debug("received have-line from uid %d",
1129 13b2bc37 2022-10-23 stsp 			    client->euid);
1130 13b2bc37 2022-10-23 stsp 			err = ensure_client_is_reading(client);
1131 13b2bc37 2022-10-23 stsp 			if (err)
1132 13b2bc37 2022-10-23 stsp 				break;
1133 13b2bc37 2022-10-23 stsp 			err = forward_have(client, &imsg);
1134 13b2bc37 2022-10-23 stsp 			if (err)
1135 13b2bc37 2022-10-23 stsp 				break;
1136 13b2bc37 2022-10-23 stsp 			break;
1137 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_FLUSH:
1138 13b2bc37 2022-10-23 stsp 			if (client->state == GOTD_STATE_EXPECT_WANT ||
1139 13b2bc37 2022-10-23 stsp 			    client->state == GOTD_STATE_EXPECT_HAVE) {
1140 13b2bc37 2022-10-23 stsp 				err = ensure_client_is_reading(client);
1141 13b2bc37 2022-10-23 stsp 				if (err)
1142 13b2bc37 2022-10-23 stsp 					break;
1143 13b2bc37 2022-10-23 stsp 			} else if (client->state ==
1144 13b2bc37 2022-10-23 stsp 			    GOTD_STATE_EXPECT_MORE_REF_UPDATES) {
1145 13b2bc37 2022-10-23 stsp 				err = ensure_client_is_writing(client);
1146 13b2bc37 2022-10-23 stsp 				if (err)
1147 13b2bc37 2022-10-23 stsp 					break;
1148 13b2bc37 2022-10-23 stsp 			} else {
1149 13b2bc37 2022-10-23 stsp 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1150 13b2bc37 2022-10-23 stsp 				    "unexpected flush-pkt received");
1151 13b2bc37 2022-10-23 stsp 				break;
1152 13b2bc37 2022-10-23 stsp 			}
1153 13b2bc37 2022-10-23 stsp 			log_debug("received flush-pkt from uid %d",
1154 13b2bc37 2022-10-23 stsp 			    client->euid);
1155 13b2bc37 2022-10-23 stsp 			if (client->state == GOTD_STATE_EXPECT_WANT) {
1156 13b2bc37 2022-10-23 stsp 				client->state = GOTD_STATE_EXPECT_HAVE;
1157 13b2bc37 2022-10-23 stsp 				log_debug("uid %d: expecting have-lines",
1158 13b2bc37 2022-10-23 stsp 				    client->euid);
1159 13b2bc37 2022-10-23 stsp 			} else if (client->state == GOTD_STATE_EXPECT_HAVE) {
1160 13b2bc37 2022-10-23 stsp 				client->state = GOTD_STATE_EXPECT_DONE;
1161 13b2bc37 2022-10-23 stsp 				log_debug("uid %d: expecting 'done'",
1162 13b2bc37 2022-10-23 stsp 				    client->euid);
1163 13b2bc37 2022-10-23 stsp 			} else if (client->state ==
1164 13b2bc37 2022-10-23 stsp 			    GOTD_STATE_EXPECT_MORE_REF_UPDATES) {
1165 13b2bc37 2022-10-23 stsp 				client->state = GOTD_STATE_EXPECT_PACKFILE;
1166 13b2bc37 2022-10-23 stsp 				log_debug("uid %d: expecting packfile",
1167 13b2bc37 2022-10-23 stsp 				    client->euid);
1168 13b2bc37 2022-10-23 stsp 				err = recv_packfile(client);
1169 13b2bc37 2022-10-23 stsp 			} else {
1170 13b2bc37 2022-10-23 stsp 				/* should not happen, see above */
1171 13b2bc37 2022-10-23 stsp 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1172 13b2bc37 2022-10-23 stsp 				    "unexpected client state");
1173 13b2bc37 2022-10-23 stsp 				break;
1174 13b2bc37 2022-10-23 stsp 			}
1175 13b2bc37 2022-10-23 stsp 			break;
1176 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_DONE:
1177 13b2bc37 2022-10-23 stsp 			if (client->state != GOTD_STATE_EXPECT_HAVE &&
1178 13b2bc37 2022-10-23 stsp 			    client->state != GOTD_STATE_EXPECT_DONE) {
1179 13b2bc37 2022-10-23 stsp 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1180 13b2bc37 2022-10-23 stsp 				    "unexpected flush-pkt received");
1181 13b2bc37 2022-10-23 stsp 				break;
1182 13b2bc37 2022-10-23 stsp 			}
1183 13b2bc37 2022-10-23 stsp 			log_debug("received 'done' from uid %d", client->euid);
1184 13b2bc37 2022-10-23 stsp 			err = ensure_client_is_reading(client);
1185 13b2bc37 2022-10-23 stsp 			if (err)
1186 13b2bc37 2022-10-23 stsp 				break;
1187 13b2bc37 2022-10-23 stsp 			client->state = GOTD_STATE_DONE;
1188 13b2bc37 2022-10-23 stsp 			err = send_packfile(client);
1189 13b2bc37 2022-10-23 stsp 			break;
1190 13b2bc37 2022-10-23 stsp 		default:
1191 13b2bc37 2022-10-23 stsp 			err = got_error(GOT_ERR_PRIVSEP_MSG);
1192 13b2bc37 2022-10-23 stsp 			break;
1193 13b2bc37 2022-10-23 stsp 		}
1194 13b2bc37 2022-10-23 stsp 
1195 13b2bc37 2022-10-23 stsp 		imsg_free(&imsg);
1196 13b2bc37 2022-10-23 stsp 	}
1197 13b2bc37 2022-10-23 stsp 
1198 13b2bc37 2022-10-23 stsp 	if (err) {
1199 13b2bc37 2022-10-23 stsp 		if (err->code != GOT_ERR_EOF ||
1200 13b2bc37 2022-10-23 stsp 		    client->state != GOTD_STATE_EXPECT_PACKFILE)
1201 13b2bc37 2022-10-23 stsp 			disconnect_on_error(client, err);
1202 13b2bc37 2022-10-23 stsp 	} else {
1203 13b2bc37 2022-10-23 stsp 		gotd_imsg_event_add(&client->iev);
1204 ef4e2f01 2022-12-29 stsp 		if (client->state == GOTD_STATE_EXPECT_LIST_REFS)
1205 ef4e2f01 2022-12-29 stsp 			evtimer_add(&client->tmo, &auth_timeout);
1206 ef4e2f01 2022-12-29 stsp 		else
1207 ef4e2f01 2022-12-29 stsp 			evtimer_add(&client->tmo, &timeout);
1208 13b2bc37 2022-10-23 stsp 	}
1209 13b2bc37 2022-10-23 stsp }
1210 13b2bc37 2022-10-23 stsp 
1211 13b2bc37 2022-10-23 stsp static void
1212 13b2bc37 2022-10-23 stsp gotd_request_timeout(int fd, short events, void *arg)
1213 13b2bc37 2022-10-23 stsp {
1214 13b2bc37 2022-10-23 stsp 	struct gotd_client *client = arg;
1215 13b2bc37 2022-10-23 stsp 
1216 13b2bc37 2022-10-23 stsp 	log_debug("disconnecting uid %d due to timeout", client->euid);
1217 13b2bc37 2022-10-23 stsp 	disconnect(client);
1218 13b2bc37 2022-10-23 stsp }
1219 13b2bc37 2022-10-23 stsp 
1220 d93ecf7d 2022-12-14 stsp static const struct got_error *
1221 d93ecf7d 2022-12-14 stsp recv_connect(uint32_t *client_id, struct imsg *imsg)
1222 13b2bc37 2022-10-23 stsp {
1223 d93ecf7d 2022-12-14 stsp 	const struct got_error *err = NULL;
1224 d93ecf7d 2022-12-14 stsp 	struct gotd_imsg_connect iconnect;
1225 d93ecf7d 2022-12-14 stsp 	size_t datalen;
1226 13b2bc37 2022-10-23 stsp 	int s = -1;
1227 13b2bc37 2022-10-23 stsp 	struct gotd_client *client = NULL;
1228 13b2bc37 2022-10-23 stsp 
1229 d93ecf7d 2022-12-14 stsp 	*client_id = 0;
1230 13b2bc37 2022-10-23 stsp 
1231 d93ecf7d 2022-12-14 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1232 d93ecf7d 2022-12-14 stsp 	if (datalen != sizeof(iconnect))
1233 d93ecf7d 2022-12-14 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
1234 d93ecf7d 2022-12-14 stsp 	memcpy(&iconnect, imsg->data, sizeof(iconnect));
1235 13b2bc37 2022-10-23 stsp 
1236 d93ecf7d 2022-12-14 stsp 	s = imsg->fd;
1237 13b2bc37 2022-10-23 stsp 	if (s == -1) {
1238 d93ecf7d 2022-12-14 stsp 		err = got_error(GOT_ERR_PRIVSEP_NO_FD);
1239 d93ecf7d 2022-12-14 stsp 		goto done;
1240 13b2bc37 2022-10-23 stsp 	}
1241 13b2bc37 2022-10-23 stsp 
1242 d93ecf7d 2022-12-14 stsp 	if (find_client(iconnect.client_id)) {
1243 d93ecf7d 2022-12-14 stsp 		err = got_error_msg(GOT_ERR_CLIENT_ID, "duplicate client ID");
1244 d93ecf7d 2022-12-14 stsp 		goto done;
1245 d93ecf7d 2022-12-14 stsp 	}
1246 13b2bc37 2022-10-23 stsp 
1247 13b2bc37 2022-10-23 stsp 	client = calloc(1, sizeof(*client));
1248 13b2bc37 2022-10-23 stsp 	if (client == NULL) {
1249 d93ecf7d 2022-12-14 stsp 		err = got_error_from_errno("calloc");
1250 d93ecf7d 2022-12-14 stsp 		goto done;
1251 13b2bc37 2022-10-23 stsp 	}
1252 13b2bc37 2022-10-23 stsp 
1253 d93ecf7d 2022-12-14 stsp 	*client_id = iconnect.client_id;
1254 d93ecf7d 2022-12-14 stsp 
1255 13b2bc37 2022-10-23 stsp 	client->state = GOTD_STATE_EXPECT_LIST_REFS;
1256 d93ecf7d 2022-12-14 stsp 	client->id = iconnect.client_id;
1257 13b2bc37 2022-10-23 stsp 	client->fd = s;
1258 13b2bc37 2022-10-23 stsp 	s = -1;
1259 13b2bc37 2022-10-23 stsp 	client->delta_cache_fd = -1;
1260 365cf0f3 2022-12-29 stsp 	/* The auth process will verify UID/GID for us. */
1261 365cf0f3 2022-12-29 stsp 	client->euid = iconnect.euid;
1262 365cf0f3 2022-12-29 stsp 	client->egid = iconnect.egid;
1263 13b2bc37 2022-10-23 stsp 	client->nref_updates = -1;
1264 13b2bc37 2022-10-23 stsp 
1265 13b2bc37 2022-10-23 stsp 	imsg_init(&client->iev.ibuf, client->fd);
1266 13b2bc37 2022-10-23 stsp 	client->iev.handler = gotd_request;
1267 13b2bc37 2022-10-23 stsp 	client->iev.events = EV_READ;
1268 13b2bc37 2022-10-23 stsp 	client->iev.handler_arg = client;
1269 13b2bc37 2022-10-23 stsp 
1270 13b2bc37 2022-10-23 stsp 	event_set(&client->iev.ev, client->fd, EV_READ, gotd_request,
1271 13b2bc37 2022-10-23 stsp 	    &client->iev);
1272 13b2bc37 2022-10-23 stsp 	gotd_imsg_event_add(&client->iev);
1273 13b2bc37 2022-10-23 stsp 
1274 13b2bc37 2022-10-23 stsp 	evtimer_set(&client->tmo, gotd_request_timeout, client);
1275 13b2bc37 2022-10-23 stsp 
1276 13b2bc37 2022-10-23 stsp 	add_client(client);
1277 13b2bc37 2022-10-23 stsp 	log_debug("%s: new client uid %d connected on fd %d", __func__,
1278 13b2bc37 2022-10-23 stsp 	    client->euid, client->fd);
1279 d93ecf7d 2022-12-14 stsp done:
1280 d93ecf7d 2022-12-14 stsp 	if (err) {
1281 b50a2b46 2022-12-29 stsp 		struct gotd_child_proc *listen_proc = &gotd.listen_proc;
1282 d93ecf7d 2022-12-14 stsp 		struct gotd_imsg_disconnect idisconnect;
1283 13b2bc37 2022-10-23 stsp 
1284 d93ecf7d 2022-12-14 stsp 		idisconnect.client_id = client->id;
1285 d93ecf7d 2022-12-14 stsp 		if (gotd_imsg_compose_event(&listen_proc->iev,
1286 d93ecf7d 2022-12-14 stsp 		    GOTD_IMSG_DISCONNECT, PROC_GOTD, -1,
1287 d93ecf7d 2022-12-14 stsp 		    &idisconnect, sizeof(idisconnect)) == -1)
1288 d93ecf7d 2022-12-14 stsp 			log_warn("imsg compose DISCONNECT");
1289 d93ecf7d 2022-12-14 stsp 
1290 d93ecf7d 2022-12-14 stsp 		if (s != -1)
1291 d93ecf7d 2022-12-14 stsp 			close(s);
1292 d93ecf7d 2022-12-14 stsp 	}
1293 d93ecf7d 2022-12-14 stsp 
1294 d93ecf7d 2022-12-14 stsp 	return err;
1295 13b2bc37 2022-10-23 stsp }
1296 13b2bc37 2022-10-23 stsp 
1297 13b2bc37 2022-10-23 stsp static const char *gotd_proc_names[PROC_MAX] = {
1298 13b2bc37 2022-10-23 stsp 	"parent",
1299 d93ecf7d 2022-12-14 stsp 	"listen",
1300 5e25db14 2022-12-29 stsp 	"auth",
1301 13b2bc37 2022-10-23 stsp 	"repo_read",
1302 13b2bc37 2022-10-23 stsp 	"repo_write"
1303 13b2bc37 2022-10-23 stsp };
1304 13b2bc37 2022-10-23 stsp 
1305 13b2bc37 2022-10-23 stsp static void
1306 13b2bc37 2022-10-23 stsp kill_proc(struct gotd_child_proc *proc, int fatal)
1307 13b2bc37 2022-10-23 stsp {
1308 13b2bc37 2022-10-23 stsp 	if (fatal) {
1309 13b2bc37 2022-10-23 stsp 		log_warnx("sending SIGKILL to PID %d", proc->pid);
1310 13b2bc37 2022-10-23 stsp 		kill(proc->pid, SIGKILL);
1311 13b2bc37 2022-10-23 stsp 	} else
1312 13b2bc37 2022-10-23 stsp 		kill(proc->pid, SIGTERM);
1313 13b2bc37 2022-10-23 stsp }
1314 13b2bc37 2022-10-23 stsp 
1315 13b2bc37 2022-10-23 stsp static void
1316 13b2bc37 2022-10-23 stsp gotd_shutdown(void)
1317 13b2bc37 2022-10-23 stsp {
1318 13b2bc37 2022-10-23 stsp 	struct gotd_child_proc *proc;
1319 b50a2b46 2022-12-29 stsp 	uint64_t slot;
1320 13b2bc37 2022-10-23 stsp 
1321 b50a2b46 2022-12-29 stsp 	for (slot = 0; slot < nitems(gotd_clients); slot++) {
1322 b50a2b46 2022-12-29 stsp 		struct gotd_client *c, *tmp;
1323 b50a2b46 2022-12-29 stsp 
1324 b50a2b46 2022-12-29 stsp 		STAILQ_FOREACH_SAFE(c, &gotd_clients[slot], entry, tmp)
1325 b50a2b46 2022-12-29 stsp 			disconnect(c);
1326 13b2bc37 2022-10-23 stsp 	}
1327 13b2bc37 2022-10-23 stsp 
1328 b50a2b46 2022-12-29 stsp 	proc = &gotd.listen_proc;
1329 b50a2b46 2022-12-29 stsp 	msgbuf_clear(&proc->iev.ibuf.w);
1330 b50a2b46 2022-12-29 stsp 	close(proc->iev.ibuf.fd);
1331 b50a2b46 2022-12-29 stsp 	kill_proc(proc, 0);
1332 5e25db14 2022-12-29 stsp 	wait_for_child(proc->pid);
1333 13b2bc37 2022-10-23 stsp 
1334 13b2bc37 2022-10-23 stsp 	log_info("terminating");
1335 13b2bc37 2022-10-23 stsp 	exit(0);
1336 13b2bc37 2022-10-23 stsp }
1337 13b2bc37 2022-10-23 stsp 
1338 13b2bc37 2022-10-23 stsp void
1339 13b2bc37 2022-10-23 stsp gotd_sighdlr(int sig, short event, void *arg)
1340 13b2bc37 2022-10-23 stsp {
1341 13b2bc37 2022-10-23 stsp 	/*
1342 13b2bc37 2022-10-23 stsp 	 * Normal signal handler rules don't apply because libevent
1343 13b2bc37 2022-10-23 stsp 	 * decouples for us.
1344 13b2bc37 2022-10-23 stsp 	 */
1345 13b2bc37 2022-10-23 stsp 
1346 13b2bc37 2022-10-23 stsp 	switch (sig) {
1347 13b2bc37 2022-10-23 stsp 	case SIGHUP:
1348 13b2bc37 2022-10-23 stsp 		log_info("%s: ignoring SIGHUP", __func__);
1349 13b2bc37 2022-10-23 stsp 		break;
1350 13b2bc37 2022-10-23 stsp 	case SIGUSR1:
1351 13b2bc37 2022-10-23 stsp 		log_info("%s: ignoring SIGUSR1", __func__);
1352 13b2bc37 2022-10-23 stsp 		break;
1353 13b2bc37 2022-10-23 stsp 	case SIGTERM:
1354 13b2bc37 2022-10-23 stsp 	case SIGINT:
1355 13b2bc37 2022-10-23 stsp 		gotd_shutdown();
1356 13b2bc37 2022-10-23 stsp 		log_warnx("gotd terminating");
1357 13b2bc37 2022-10-23 stsp 		exit(0);
1358 13b2bc37 2022-10-23 stsp 		break;
1359 13b2bc37 2022-10-23 stsp 	default:
1360 13b2bc37 2022-10-23 stsp 		fatalx("unexpected signal");
1361 13b2bc37 2022-10-23 stsp 	}
1362 13b2bc37 2022-10-23 stsp }
1363 13b2bc37 2022-10-23 stsp 
1364 13b2bc37 2022-10-23 stsp static const struct got_error *
1365 13b2bc37 2022-10-23 stsp ensure_proc_is_reading(struct gotd_client *client,
1366 13b2bc37 2022-10-23 stsp     struct gotd_child_proc *proc)
1367 13b2bc37 2022-10-23 stsp {
1368 13b2bc37 2022-10-23 stsp 	if (!client_is_reading(client)) {
1369 13b2bc37 2022-10-23 stsp 		kill_proc(proc, 1);
1370 13b2bc37 2022-10-23 stsp 		return got_error_fmt(GOT_ERR_BAD_PACKET,
1371 13b2bc37 2022-10-23 stsp 		    "PID %d handled a read-request for uid %d but this "
1372 13b2bc37 2022-10-23 stsp 		    "user is not reading from a repository", proc->pid,
1373 13b2bc37 2022-10-23 stsp 		    client->euid);
1374 13b2bc37 2022-10-23 stsp 	}
1375 13b2bc37 2022-10-23 stsp 
1376 13b2bc37 2022-10-23 stsp 	return NULL;
1377 13b2bc37 2022-10-23 stsp }
1378 13b2bc37 2022-10-23 stsp 
1379 13b2bc37 2022-10-23 stsp static const struct got_error *
1380 13b2bc37 2022-10-23 stsp ensure_proc_is_writing(struct gotd_client *client,
1381 13b2bc37 2022-10-23 stsp     struct gotd_child_proc *proc)
1382 13b2bc37 2022-10-23 stsp {
1383 13b2bc37 2022-10-23 stsp 	if (!client_is_writing(client)) {
1384 13b2bc37 2022-10-23 stsp 		kill_proc(proc, 1);
1385 13b2bc37 2022-10-23 stsp 		return got_error_fmt(GOT_ERR_BAD_PACKET,
1386 13b2bc37 2022-10-23 stsp 		    "PID %d handled a write-request for uid %d but this "
1387 13b2bc37 2022-10-23 stsp 		    "user is not writing to a repository", proc->pid,
1388 13b2bc37 2022-10-23 stsp 		    client->euid);
1389 13b2bc37 2022-10-23 stsp 	}
1390 13b2bc37 2022-10-23 stsp 
1391 13b2bc37 2022-10-23 stsp 	return NULL;
1392 13b2bc37 2022-10-23 stsp }
1393 13b2bc37 2022-10-23 stsp 
1394 13b2bc37 2022-10-23 stsp static int
1395 13b2bc37 2022-10-23 stsp verify_imsg_src(struct gotd_client *client, struct gotd_child_proc *proc,
1396 13b2bc37 2022-10-23 stsp     struct imsg *imsg)
1397 13b2bc37 2022-10-23 stsp {
1398 13b2bc37 2022-10-23 stsp 	const struct got_error *err;
1399 13b2bc37 2022-10-23 stsp 	struct gotd_child_proc *client_proc;
1400 13b2bc37 2022-10-23 stsp 	int ret = 0;
1401 13b2bc37 2022-10-23 stsp 
1402 d93ecf7d 2022-12-14 stsp 	if (proc->type == PROC_REPO_READ || proc->type == PROC_REPO_WRITE) {
1403 d93ecf7d 2022-12-14 stsp 		client_proc = get_client_proc(client);
1404 d93ecf7d 2022-12-14 stsp 		if (client_proc == NULL)
1405 d93ecf7d 2022-12-14 stsp 			fatalx("no process found for uid %d", client->euid);
1406 d93ecf7d 2022-12-14 stsp 		if (proc->pid != client_proc->pid) {
1407 d93ecf7d 2022-12-14 stsp 			kill_proc(proc, 1);
1408 d93ecf7d 2022-12-14 stsp 			log_warnx("received message from PID %d for uid %d, "
1409 d93ecf7d 2022-12-14 stsp 			    "while PID %d is the process serving this user",
1410 d93ecf7d 2022-12-14 stsp 			    proc->pid, client->euid, client_proc->pid);
1411 d93ecf7d 2022-12-14 stsp 			return 0;
1412 d93ecf7d 2022-12-14 stsp 		}
1413 13b2bc37 2022-10-23 stsp 	}
1414 13b2bc37 2022-10-23 stsp 
1415 13b2bc37 2022-10-23 stsp 	switch (imsg->hdr.type) {
1416 13b2bc37 2022-10-23 stsp 	case GOTD_IMSG_ERROR:
1417 13b2bc37 2022-10-23 stsp 		ret = 1;
1418 13b2bc37 2022-10-23 stsp 		break;
1419 d93ecf7d 2022-12-14 stsp 	case GOTD_IMSG_CONNECT:
1420 d93ecf7d 2022-12-14 stsp 		if (proc->type != PROC_LISTEN) {
1421 d93ecf7d 2022-12-14 stsp 			err = got_error_fmt(GOT_ERR_BAD_PACKET,
1422 d93ecf7d 2022-12-14 stsp 			    "new connection for uid %d from PID %d "
1423 d93ecf7d 2022-12-14 stsp 			    "which is not the listen process",
1424 5e25db14 2022-12-29 stsp 			    proc->pid, client->euid);
1425 5e25db14 2022-12-29 stsp 		} else
1426 5e25db14 2022-12-29 stsp 			ret = 1;
1427 5e25db14 2022-12-29 stsp 		break;
1428 5e25db14 2022-12-29 stsp 	case GOTD_IMSG_ACCESS_GRANTED:
1429 5e25db14 2022-12-29 stsp 		if (proc->type != PROC_AUTH) {
1430 5e25db14 2022-12-29 stsp 			err = got_error_fmt(GOT_ERR_BAD_PACKET,
1431 5e25db14 2022-12-29 stsp 			    "authentication of uid %d from PID %d "
1432 5e25db14 2022-12-29 stsp 			    "which is not the auth process",
1433 d93ecf7d 2022-12-14 stsp 			    proc->pid, client->euid);
1434 d93ecf7d 2022-12-14 stsp 		} else
1435 d93ecf7d 2022-12-14 stsp 			ret = 1;
1436 d93ecf7d 2022-12-14 stsp 		break;
1437 b50a2b46 2022-12-29 stsp 	case GOTD_IMSG_REPO_CHILD_READY:
1438 b50a2b46 2022-12-29 stsp 		if (proc->type != PROC_REPO_READ &&
1439 b50a2b46 2022-12-29 stsp 		    proc->type != PROC_REPO_WRITE) {
1440 b50a2b46 2022-12-29 stsp 			err = got_error_fmt(GOT_ERR_BAD_PACKET,
1441 b50a2b46 2022-12-29 stsp 			    "unexpected \"ready\" signal from PID %d",
1442 b50a2b46 2022-12-29 stsp 			    proc->pid);
1443 b50a2b46 2022-12-29 stsp 		} else
1444 b50a2b46 2022-12-29 stsp 			ret = 1;
1445 b50a2b46 2022-12-29 stsp 		break;
1446 13b2bc37 2022-10-23 stsp 	case GOTD_IMSG_PACKFILE_DONE:
1447 13b2bc37 2022-10-23 stsp 		err = ensure_proc_is_reading(client, proc);
1448 13b2bc37 2022-10-23 stsp 		if (err)
1449 13b2bc37 2022-10-23 stsp 			log_warnx("uid %d: %s", client->euid, err->msg);
1450 13b2bc37 2022-10-23 stsp 		else
1451 13b2bc37 2022-10-23 stsp 			ret = 1;
1452 13b2bc37 2022-10-23 stsp 		break;
1453 13b2bc37 2022-10-23 stsp 	case GOTD_IMSG_PACKFILE_INSTALL:
1454 13b2bc37 2022-10-23 stsp 	case GOTD_IMSG_REF_UPDATES_START:
1455 13b2bc37 2022-10-23 stsp 	case GOTD_IMSG_REF_UPDATE:
1456 13b2bc37 2022-10-23 stsp 		err = ensure_proc_is_writing(client, proc);
1457 13b2bc37 2022-10-23 stsp 		if (err)
1458 13b2bc37 2022-10-23 stsp 			log_warnx("uid %d: %s", client->euid, err->msg);
1459 13b2bc37 2022-10-23 stsp 		else
1460 13b2bc37 2022-10-23 stsp 			ret = 1;
1461 13b2bc37 2022-10-23 stsp 		break;
1462 13b2bc37 2022-10-23 stsp 	default:
1463 13b2bc37 2022-10-23 stsp 		log_debug("%s: unexpected imsg %d", __func__, imsg->hdr.type);
1464 13b2bc37 2022-10-23 stsp 		break;
1465 13b2bc37 2022-10-23 stsp 	}
1466 13b2bc37 2022-10-23 stsp 
1467 13b2bc37 2022-10-23 stsp 	return ret;
1468 13b2bc37 2022-10-23 stsp }
1469 13b2bc37 2022-10-23 stsp 
1470 13b2bc37 2022-10-23 stsp static const struct got_error *
1471 b50a2b46 2022-12-29 stsp list_refs_request(struct gotd_client *client, struct gotd_imsgev *iev)
1472 b50a2b46 2022-12-29 stsp {
1473 b50a2b46 2022-12-29 stsp 	static const struct got_error *err;
1474 b50a2b46 2022-12-29 stsp 	struct gotd_imsg_list_refs_internal ilref;
1475 b50a2b46 2022-12-29 stsp 	int fd;
1476 b50a2b46 2022-12-29 stsp 
1477 b50a2b46 2022-12-29 stsp 	memset(&ilref, 0, sizeof(ilref));
1478 b50a2b46 2022-12-29 stsp 	ilref.client_id = client->id;
1479 b50a2b46 2022-12-29 stsp 
1480 b50a2b46 2022-12-29 stsp 	fd = dup(client->fd);
1481 b50a2b46 2022-12-29 stsp 	if (fd == -1)
1482 b50a2b46 2022-12-29 stsp 		return got_error_from_errno("dup");
1483 b50a2b46 2022-12-29 stsp 
1484 b50a2b46 2022-12-29 stsp 	if (gotd_imsg_compose_event(iev, GOTD_IMSG_LIST_REFS_INTERNAL,
1485 b50a2b46 2022-12-29 stsp 	    PROC_GOTD, fd, &ilref, sizeof(ilref)) == -1) {
1486 b50a2b46 2022-12-29 stsp 		err = got_error_from_errno("imsg compose WANT");
1487 b50a2b46 2022-12-29 stsp 		close(fd);
1488 b50a2b46 2022-12-29 stsp 		return err;
1489 b50a2b46 2022-12-29 stsp 	}
1490 b50a2b46 2022-12-29 stsp 
1491 b50a2b46 2022-12-29 stsp 	client->state = GOTD_STATE_EXPECT_CAPABILITIES;
1492 b50a2b46 2022-12-29 stsp 	log_debug("uid %d: expecting capabilities", client->euid);
1493 b50a2b46 2022-12-29 stsp 	return NULL;
1494 b50a2b46 2022-12-29 stsp }
1495 b50a2b46 2022-12-29 stsp 
1496 b50a2b46 2022-12-29 stsp static const struct got_error *
1497 13b2bc37 2022-10-23 stsp recv_packfile_done(uint32_t *client_id, struct imsg *imsg)
1498 13b2bc37 2022-10-23 stsp {
1499 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_packfile_done idone;
1500 13b2bc37 2022-10-23 stsp 	size_t datalen;
1501 13b2bc37 2022-10-23 stsp 
1502 13b2bc37 2022-10-23 stsp 	log_debug("packfile-done received");
1503 13b2bc37 2022-10-23 stsp 
1504 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1505 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(idone))
1506 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
1507 13b2bc37 2022-10-23 stsp 	memcpy(&idone, imsg->data, sizeof(idone));
1508 13b2bc37 2022-10-23 stsp 
1509 13b2bc37 2022-10-23 stsp 	*client_id = idone.client_id;
1510 13b2bc37 2022-10-23 stsp 	return NULL;
1511 13b2bc37 2022-10-23 stsp }
1512 13b2bc37 2022-10-23 stsp 
1513 13b2bc37 2022-10-23 stsp static const struct got_error *
1514 13b2bc37 2022-10-23 stsp recv_packfile_install(uint32_t *client_id, struct imsg *imsg)
1515 13b2bc37 2022-10-23 stsp {
1516 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_packfile_install inst;
1517 13b2bc37 2022-10-23 stsp 	size_t datalen;
1518 13b2bc37 2022-10-23 stsp 
1519 13b2bc37 2022-10-23 stsp 	log_debug("packfile-install received");
1520 13b2bc37 2022-10-23 stsp 
1521 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1522 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(inst))
1523 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
1524 13b2bc37 2022-10-23 stsp 	memcpy(&inst, imsg->data, sizeof(inst));
1525 13b2bc37 2022-10-23 stsp 
1526 13b2bc37 2022-10-23 stsp 	*client_id = inst.client_id;
1527 13b2bc37 2022-10-23 stsp 	return NULL;
1528 13b2bc37 2022-10-23 stsp }
1529 13b2bc37 2022-10-23 stsp 
1530 13b2bc37 2022-10-23 stsp static const struct got_error *
1531 13b2bc37 2022-10-23 stsp recv_ref_updates_start(uint32_t *client_id, struct imsg *imsg)
1532 13b2bc37 2022-10-23 stsp {
1533 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_ref_updates_start istart;
1534 13b2bc37 2022-10-23 stsp 	size_t datalen;
1535 13b2bc37 2022-10-23 stsp 
1536 13b2bc37 2022-10-23 stsp 	log_debug("ref-updates-start received");
1537 13b2bc37 2022-10-23 stsp 
1538 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1539 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(istart))
1540 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
1541 13b2bc37 2022-10-23 stsp 	memcpy(&istart, imsg->data, sizeof(istart));
1542 13b2bc37 2022-10-23 stsp 
1543 13b2bc37 2022-10-23 stsp 	*client_id = istart.client_id;
1544 13b2bc37 2022-10-23 stsp 	return NULL;
1545 13b2bc37 2022-10-23 stsp }
1546 13b2bc37 2022-10-23 stsp 
1547 13b2bc37 2022-10-23 stsp static const struct got_error *
1548 13b2bc37 2022-10-23 stsp recv_ref_update(uint32_t *client_id, struct imsg *imsg)
1549 13b2bc37 2022-10-23 stsp {
1550 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_ref_update iref;
1551 13b2bc37 2022-10-23 stsp 	size_t datalen;
1552 13b2bc37 2022-10-23 stsp 
1553 13b2bc37 2022-10-23 stsp 	log_debug("ref-update received");
1554 13b2bc37 2022-10-23 stsp 
1555 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1556 13b2bc37 2022-10-23 stsp 	if (datalen < sizeof(iref))
1557 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
1558 13b2bc37 2022-10-23 stsp 	memcpy(&iref, imsg->data, sizeof(iref));
1559 13b2bc37 2022-10-23 stsp 
1560 13b2bc37 2022-10-23 stsp 	*client_id = iref.client_id;
1561 13b2bc37 2022-10-23 stsp 	return NULL;
1562 13b2bc37 2022-10-23 stsp }
1563 13b2bc37 2022-10-23 stsp 
1564 13b2bc37 2022-10-23 stsp static const struct got_error *
1565 13b2bc37 2022-10-23 stsp send_ref_update_ok(struct gotd_client *client,
1566 13b2bc37 2022-10-23 stsp     struct gotd_imsg_ref_update *iref, const char *refname)
1567 13b2bc37 2022-10-23 stsp {
1568 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_ref_update_ok iok;
1569 13b2bc37 2022-10-23 stsp 	struct ibuf *wbuf;
1570 13b2bc37 2022-10-23 stsp 	size_t len;
1571 13b2bc37 2022-10-23 stsp 
1572 13b2bc37 2022-10-23 stsp 	memset(&iok, 0, sizeof(iok));
1573 13b2bc37 2022-10-23 stsp 	iok.client_id = client->id;
1574 13b2bc37 2022-10-23 stsp 	memcpy(iok.old_id, iref->old_id, SHA1_DIGEST_LENGTH);
1575 13b2bc37 2022-10-23 stsp 	memcpy(iok.new_id, iref->new_id, SHA1_DIGEST_LENGTH);
1576 13b2bc37 2022-10-23 stsp 	iok.name_len = strlen(refname);
1577 13b2bc37 2022-10-23 stsp 
1578 13b2bc37 2022-10-23 stsp 	len = sizeof(iok) + iok.name_len;
1579 13b2bc37 2022-10-23 stsp 	wbuf = imsg_create(&client->iev.ibuf, GOTD_IMSG_REF_UPDATE_OK,
1580 13b2bc37 2022-10-23 stsp 	    PROC_GOTD, gotd.pid, len);
1581 13b2bc37 2022-10-23 stsp 	if (wbuf == NULL)
1582 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("imsg_create REF_UPDATE_OK");
1583 13b2bc37 2022-10-23 stsp 
1584 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, &iok, sizeof(iok)) == -1)
1585 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("imsg_add REF_UPDATE_OK");
1586 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, refname, iok.name_len) == -1)
1587 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("imsg_add REF_UPDATE_OK");
1588 13b2bc37 2022-10-23 stsp 
1589 13b2bc37 2022-10-23 stsp 	wbuf->fd = -1;
1590 13b2bc37 2022-10-23 stsp 	imsg_close(&client->iev.ibuf, wbuf);
1591 13b2bc37 2022-10-23 stsp 	gotd_imsg_event_add(&client->iev);
1592 13b2bc37 2022-10-23 stsp 	return NULL;
1593 13b2bc37 2022-10-23 stsp }
1594 13b2bc37 2022-10-23 stsp 
1595 13b2bc37 2022-10-23 stsp static void
1596 13b2bc37 2022-10-23 stsp send_refs_updated(struct gotd_client *client)
1597 13b2bc37 2022-10-23 stsp {
1598 13b2bc37 2022-10-23 stsp 	if (gotd_imsg_compose_event(&client->iev,
1599 13b2bc37 2022-10-23 stsp 	    GOTD_IMSG_REFS_UPDATED, PROC_GOTD, -1, NULL, 0) == -1)
1600 13b2bc37 2022-10-23 stsp 		log_warn("imsg compose REFS_UPDATED");
1601 13b2bc37 2022-10-23 stsp }
1602 13b2bc37 2022-10-23 stsp 
1603 13b2bc37 2022-10-23 stsp static const struct got_error *
1604 13b2bc37 2022-10-23 stsp send_ref_update_ng(struct gotd_client *client,
1605 13b2bc37 2022-10-23 stsp     struct gotd_imsg_ref_update *iref, const char *refname,
1606 13b2bc37 2022-10-23 stsp     const char *reason)
1607 13b2bc37 2022-10-23 stsp {
1608 13b2bc37 2022-10-23 stsp 	const struct got_error *ng_err;
1609 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_ref_update_ng ing;
1610 13b2bc37 2022-10-23 stsp 	struct ibuf *wbuf;
1611 13b2bc37 2022-10-23 stsp 	size_t len;
1612 13b2bc37 2022-10-23 stsp 
1613 13b2bc37 2022-10-23 stsp 	memset(&ing, 0, sizeof(ing));
1614 13b2bc37 2022-10-23 stsp 	ing.client_id = client->id;
1615 13b2bc37 2022-10-23 stsp 	memcpy(ing.old_id, iref->old_id, SHA1_DIGEST_LENGTH);
1616 13b2bc37 2022-10-23 stsp 	memcpy(ing.new_id, iref->new_id, SHA1_DIGEST_LENGTH);
1617 13b2bc37 2022-10-23 stsp 	ing.name_len = strlen(refname);
1618 13b2bc37 2022-10-23 stsp 
1619 13b2bc37 2022-10-23 stsp 	ng_err = got_error_fmt(GOT_ERR_REF_BUSY, "%s", reason);
1620 13b2bc37 2022-10-23 stsp 	ing.reason_len = strlen(ng_err->msg);
1621 13b2bc37 2022-10-23 stsp 
1622 13b2bc37 2022-10-23 stsp 	len = sizeof(ing) + ing.name_len + ing.reason_len;
1623 13b2bc37 2022-10-23 stsp 	wbuf = imsg_create(&client->iev.ibuf, GOTD_IMSG_REF_UPDATE_NG,
1624 13b2bc37 2022-10-23 stsp 	    PROC_GOTD, gotd.pid, len);
1625 13b2bc37 2022-10-23 stsp 	if (wbuf == NULL)
1626 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("imsg_create REF_UPDATE_NG");
1627 13b2bc37 2022-10-23 stsp 
1628 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, &ing, sizeof(ing)) == -1)
1629 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("imsg_add REF_UPDATE_NG");
1630 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, refname, ing.name_len) == -1)
1631 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("imsg_add REF_UPDATE_NG");
1632 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, ng_err->msg, ing.reason_len) == -1)
1633 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("imsg_add REF_UPDATE_NG");
1634 13b2bc37 2022-10-23 stsp 
1635 13b2bc37 2022-10-23 stsp 	wbuf->fd = -1;
1636 13b2bc37 2022-10-23 stsp 	imsg_close(&client->iev.ibuf, wbuf);
1637 13b2bc37 2022-10-23 stsp 	gotd_imsg_event_add(&client->iev);
1638 13b2bc37 2022-10-23 stsp 	return NULL;
1639 13b2bc37 2022-10-23 stsp }
1640 13b2bc37 2022-10-23 stsp 
1641 13b2bc37 2022-10-23 stsp static const struct got_error *
1642 13b2bc37 2022-10-23 stsp install_pack(struct gotd_client *client, const char *repo_path,
1643 13b2bc37 2022-10-23 stsp     struct imsg *imsg)
1644 13b2bc37 2022-10-23 stsp {
1645 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
1646 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_packfile_install inst;
1647 13b2bc37 2022-10-23 stsp 	char hex[SHA1_DIGEST_STRING_LENGTH];
1648 13b2bc37 2022-10-23 stsp 	size_t datalen;
1649 13b2bc37 2022-10-23 stsp 	char *packfile_path = NULL, *packidx_path = NULL;
1650 13b2bc37 2022-10-23 stsp 
1651 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1652 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(inst))
1653 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
1654 13b2bc37 2022-10-23 stsp 	memcpy(&inst, imsg->data, sizeof(inst));
1655 13b2bc37 2022-10-23 stsp 
1656 13b2bc37 2022-10-23 stsp 	if (client->packfile_path == NULL)
1657 13b2bc37 2022-10-23 stsp 		return got_error_msg(GOT_ERR_BAD_REQUEST,
1658 13b2bc37 2022-10-23 stsp 		    "client has no pack file");
1659 13b2bc37 2022-10-23 stsp 	if (client->packidx_path == NULL)
1660 13b2bc37 2022-10-23 stsp 		return got_error_msg(GOT_ERR_BAD_REQUEST,
1661 13b2bc37 2022-10-23 stsp 		    "client has no pack file index");
1662 13b2bc37 2022-10-23 stsp 
1663 13b2bc37 2022-10-23 stsp 	if (got_sha1_digest_to_str(inst.pack_sha1, hex, sizeof(hex)) == NULL)
1664 13b2bc37 2022-10-23 stsp 		return got_error_msg(GOT_ERR_NO_SPACE,
1665 13b2bc37 2022-10-23 stsp 		    "could not convert pack file SHA1 to hex");
1666 13b2bc37 2022-10-23 stsp 
1667 13b2bc37 2022-10-23 stsp 	if (asprintf(&packfile_path, "/%s/%s/pack-%s.pack",
1668 13b2bc37 2022-10-23 stsp 	    repo_path, GOT_OBJECTS_PACK_DIR, hex) == -1) {
1669 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("asprintf");
1670 13b2bc37 2022-10-23 stsp 		goto done;
1671 13b2bc37 2022-10-23 stsp 	}
1672 13b2bc37 2022-10-23 stsp 
1673 13b2bc37 2022-10-23 stsp 	if (asprintf(&packidx_path, "/%s/%s/pack-%s.idx",
1674 13b2bc37 2022-10-23 stsp 	    repo_path, GOT_OBJECTS_PACK_DIR, hex) == -1) {
1675 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("asprintf");
1676 13b2bc37 2022-10-23 stsp 		goto done;
1677 13b2bc37 2022-10-23 stsp 	}
1678 13b2bc37 2022-10-23 stsp 
1679 13b2bc37 2022-10-23 stsp 	if (rename(client->packfile_path, packfile_path) == -1) {
1680 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno3("rename", client->packfile_path,
1681 13b2bc37 2022-10-23 stsp 		    packfile_path);
1682 13b2bc37 2022-10-23 stsp 		goto done;
1683 13b2bc37 2022-10-23 stsp 	}
1684 13b2bc37 2022-10-23 stsp 
1685 13b2bc37 2022-10-23 stsp 	free(client->packfile_path);
1686 13b2bc37 2022-10-23 stsp 	client->packfile_path = NULL;
1687 13b2bc37 2022-10-23 stsp 
1688 13b2bc37 2022-10-23 stsp 	if (rename(client->packidx_path, packidx_path) == -1) {
1689 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno3("rename", client->packidx_path,
1690 13b2bc37 2022-10-23 stsp 		    packidx_path);
1691 13b2bc37 2022-10-23 stsp 		goto done;
1692 13b2bc37 2022-10-23 stsp 	}
1693 13b2bc37 2022-10-23 stsp 
1694 13b2bc37 2022-10-23 stsp 	free(client->packidx_path);
1695 13b2bc37 2022-10-23 stsp 	client->packidx_path = NULL;
1696 13b2bc37 2022-10-23 stsp done:
1697 13b2bc37 2022-10-23 stsp 	free(packfile_path);
1698 13b2bc37 2022-10-23 stsp 	free(packidx_path);
1699 13b2bc37 2022-10-23 stsp 	return err;
1700 13b2bc37 2022-10-23 stsp }
1701 13b2bc37 2022-10-23 stsp 
1702 13b2bc37 2022-10-23 stsp static const struct got_error *
1703 13b2bc37 2022-10-23 stsp begin_ref_updates(struct gotd_client *client, struct imsg *imsg)
1704 13b2bc37 2022-10-23 stsp {
1705 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_ref_updates_start istart;
1706 13b2bc37 2022-10-23 stsp 	size_t datalen;
1707 13b2bc37 2022-10-23 stsp 
1708 13b2bc37 2022-10-23 stsp 	if (client->nref_updates != -1)
1709 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_MSG);
1710 13b2bc37 2022-10-23 stsp 
1711 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1712 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(istart))
1713 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
1714 13b2bc37 2022-10-23 stsp 	memcpy(&istart, imsg->data, sizeof(istart));
1715 13b2bc37 2022-10-23 stsp 
1716 13b2bc37 2022-10-23 stsp 	if (istart.nref_updates <= 0)
1717 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_MSG);
1718 13b2bc37 2022-10-23 stsp 
1719 13b2bc37 2022-10-23 stsp 	client->nref_updates = istart.nref_updates;
1720 13b2bc37 2022-10-23 stsp 	return NULL;
1721 13b2bc37 2022-10-23 stsp }
1722 13b2bc37 2022-10-23 stsp 
1723 13b2bc37 2022-10-23 stsp static const struct got_error *
1724 13b2bc37 2022-10-23 stsp update_ref(struct gotd_client *client, const char *repo_path,
1725 13b2bc37 2022-10-23 stsp     struct imsg *imsg)
1726 13b2bc37 2022-10-23 stsp {
1727 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
1728 13b2bc37 2022-10-23 stsp 	struct got_repository *repo = NULL;
1729 13b2bc37 2022-10-23 stsp 	struct got_reference *ref = NULL;
1730 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_ref_update iref;
1731 13b2bc37 2022-10-23 stsp 	struct got_object_id old_id, new_id;
1732 13b2bc37 2022-10-23 stsp 	struct got_object_id *id = NULL;
1733 13b2bc37 2022-10-23 stsp 	struct got_object *obj = NULL;
1734 13b2bc37 2022-10-23 stsp 	char *refname = NULL;
1735 13b2bc37 2022-10-23 stsp 	size_t datalen;
1736 13b2bc37 2022-10-23 stsp 	int locked = 0;
1737 13b2bc37 2022-10-23 stsp 
1738 13b2bc37 2022-10-23 stsp 	log_debug("update-ref from uid %d", client->euid);
1739 13b2bc37 2022-10-23 stsp 
1740 13b2bc37 2022-10-23 stsp 	if (client->nref_updates <= 0)
1741 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_MSG);
1742 13b2bc37 2022-10-23 stsp 
1743 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1744 13b2bc37 2022-10-23 stsp 	if (datalen < sizeof(iref))
1745 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
1746 13b2bc37 2022-10-23 stsp 	memcpy(&iref, imsg->data, sizeof(iref));
1747 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(iref) + iref.name_len)
1748 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
1749 13b2bc37 2022-10-23 stsp 	refname = malloc(iref.name_len + 1);
1750 13b2bc37 2022-10-23 stsp 	if (refname == NULL)
1751 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("malloc");
1752 13b2bc37 2022-10-23 stsp 	memcpy(refname, imsg->data + sizeof(iref), iref.name_len);
1753 13b2bc37 2022-10-23 stsp 	refname[iref.name_len] = '\0';
1754 13b2bc37 2022-10-23 stsp 
1755 13b2bc37 2022-10-23 stsp 	log_debug("updating ref %s for uid %d", refname, client->euid);
1756 13b2bc37 2022-10-23 stsp 
1757 13b2bc37 2022-10-23 stsp 	err = got_repo_open(&repo, repo_path, NULL, NULL);
1758 13b2bc37 2022-10-23 stsp 	if (err)
1759 13b2bc37 2022-10-23 stsp 		goto done;
1760 13b2bc37 2022-10-23 stsp 
1761 13b2bc37 2022-10-23 stsp 	memcpy(old_id.sha1, iref.old_id, SHA1_DIGEST_LENGTH);
1762 13b2bc37 2022-10-23 stsp 	memcpy(new_id.sha1, iref.new_id, SHA1_DIGEST_LENGTH);
1763 13b2bc37 2022-10-23 stsp 	err = got_object_open(&obj, repo, &new_id);
1764 13b2bc37 2022-10-23 stsp 	if (err)
1765 13b2bc37 2022-10-23 stsp 		goto done;
1766 13b2bc37 2022-10-23 stsp 
1767 13b2bc37 2022-10-23 stsp 	if (iref.ref_is_new) {
1768 13b2bc37 2022-10-23 stsp 		err = got_ref_open(&ref, repo, refname, 0);
1769 13b2bc37 2022-10-23 stsp 		if (err) {
1770 13b2bc37 2022-10-23 stsp 			if (err->code != GOT_ERR_NOT_REF)
1771 13b2bc37 2022-10-23 stsp 				goto done;
1772 13b2bc37 2022-10-23 stsp 			err = got_ref_alloc(&ref, refname, &new_id);
1773 13b2bc37 2022-10-23 stsp 			if (err)
1774 13b2bc37 2022-10-23 stsp 				goto done;
1775 13b2bc37 2022-10-23 stsp 			err = got_ref_write(ref, repo); /* will lock/unlock */
1776 13b2bc37 2022-10-23 stsp 			if (err)
1777 13b2bc37 2022-10-23 stsp 				goto done;
1778 13b2bc37 2022-10-23 stsp 		} else {
1779 13b2bc37 2022-10-23 stsp 			err = got_error_fmt(GOT_ERR_REF_BUSY,
1780 13b2bc37 2022-10-23 stsp 			    "%s has been created by someone else "
1781 13b2bc37 2022-10-23 stsp 			    "while transaction was in progress",
1782 13b2bc37 2022-10-23 stsp 			    got_ref_get_name(ref));
1783 13b2bc37 2022-10-23 stsp 			goto done;
1784 13b2bc37 2022-10-23 stsp 		}
1785 13b2bc37 2022-10-23 stsp 	} else {
1786 13b2bc37 2022-10-23 stsp 		err = got_ref_open(&ref, repo, refname, 1 /* lock */);
1787 13b2bc37 2022-10-23 stsp 		if (err)
1788 13b2bc37 2022-10-23 stsp 			goto done;
1789 13b2bc37 2022-10-23 stsp 		locked = 1;
1790 13b2bc37 2022-10-23 stsp 
1791 13b2bc37 2022-10-23 stsp 		err = got_ref_resolve(&id, repo, ref);
1792 13b2bc37 2022-10-23 stsp 		if (err)
1793 13b2bc37 2022-10-23 stsp 			goto done;
1794 13b2bc37 2022-10-23 stsp 
1795 13b2bc37 2022-10-23 stsp 		if (got_object_id_cmp(id, &old_id) != 0) {
1796 13b2bc37 2022-10-23 stsp 			err = got_error_fmt(GOT_ERR_REF_BUSY,
1797 13b2bc37 2022-10-23 stsp 			    "%s has been modified by someone else "
1798 13b2bc37 2022-10-23 stsp 			    "while transaction was in progress",
1799 13b2bc37 2022-10-23 stsp 			    got_ref_get_name(ref));
1800 13b2bc37 2022-10-23 stsp 			goto done;
1801 13b2bc37 2022-10-23 stsp 		}
1802 13b2bc37 2022-10-23 stsp 
1803 13b2bc37 2022-10-23 stsp 		err = got_ref_change_ref(ref, &new_id);
1804 13b2bc37 2022-10-23 stsp 		if (err)
1805 13b2bc37 2022-10-23 stsp 			goto done;
1806 13b2bc37 2022-10-23 stsp 
1807 13b2bc37 2022-10-23 stsp 		err = got_ref_write(ref, repo);
1808 13b2bc37 2022-10-23 stsp 		if (err)
1809 13b2bc37 2022-10-23 stsp 			goto done;
1810 13b2bc37 2022-10-23 stsp 
1811 13b2bc37 2022-10-23 stsp 		free(id);
1812 13b2bc37 2022-10-23 stsp 		id = NULL;
1813 13b2bc37 2022-10-23 stsp 	}
1814 13b2bc37 2022-10-23 stsp done:
1815 13b2bc37 2022-10-23 stsp 	if (err) {
1816 13b2bc37 2022-10-23 stsp 		if (err->code == GOT_ERR_LOCKFILE_TIMEOUT) {
1817 13b2bc37 2022-10-23 stsp 			err = got_error_fmt(GOT_ERR_LOCKFILE_TIMEOUT,
1818 13b2bc37 2022-10-23 stsp 			    "could not acquire exclusive file lock for %s",
1819 13b2bc37 2022-10-23 stsp 			    refname);
1820 13b2bc37 2022-10-23 stsp 		}
1821 13b2bc37 2022-10-23 stsp 		send_ref_update_ng(client, &iref, refname, err->msg);
1822 13b2bc37 2022-10-23 stsp 	} else
1823 13b2bc37 2022-10-23 stsp 		send_ref_update_ok(client, &iref, refname);
1824 13b2bc37 2022-10-23 stsp 
1825 13b2bc37 2022-10-23 stsp 	if (client->nref_updates > 0) {
1826 13b2bc37 2022-10-23 stsp 		client->nref_updates--;
1827 13b2bc37 2022-10-23 stsp 		if (client->nref_updates == 0)
1828 13b2bc37 2022-10-23 stsp 			send_refs_updated(client);
1829 13b2bc37 2022-10-23 stsp 
1830 13b2bc37 2022-10-23 stsp 	}
1831 13b2bc37 2022-10-23 stsp 	if (locked) {
1832 13b2bc37 2022-10-23 stsp 		const struct got_error *unlock_err;
1833 13b2bc37 2022-10-23 stsp 		unlock_err = got_ref_unlock(ref);
1834 13b2bc37 2022-10-23 stsp 		if (unlock_err && err == NULL)
1835 13b2bc37 2022-10-23 stsp 			err = unlock_err;
1836 13b2bc37 2022-10-23 stsp 	}
1837 13b2bc37 2022-10-23 stsp 	if (ref)
1838 13b2bc37 2022-10-23 stsp 		got_ref_close(ref);
1839 13b2bc37 2022-10-23 stsp 	if (obj)
1840 13b2bc37 2022-10-23 stsp 		got_object_close(obj);
1841 13b2bc37 2022-10-23 stsp 	if (repo)
1842 13b2bc37 2022-10-23 stsp 		got_repo_close(repo);
1843 13b2bc37 2022-10-23 stsp 	free(refname);
1844 13b2bc37 2022-10-23 stsp 	free(id);
1845 13b2bc37 2022-10-23 stsp 	return err;
1846 13b2bc37 2022-10-23 stsp }
1847 13b2bc37 2022-10-23 stsp 
1848 13b2bc37 2022-10-23 stsp static void
1849 b50a2b46 2022-12-29 stsp gotd_dispatch_listener(int fd, short event, void *arg)
1850 13b2bc37 2022-10-23 stsp {
1851 13b2bc37 2022-10-23 stsp 	struct gotd_imsgev *iev = arg;
1852 13b2bc37 2022-10-23 stsp 	struct imsgbuf *ibuf = &iev->ibuf;
1853 b50a2b46 2022-12-29 stsp 	struct gotd_child_proc *proc = &gotd.listen_proc;
1854 b50a2b46 2022-12-29 stsp 	ssize_t n;
1855 b50a2b46 2022-12-29 stsp 	int shut = 0;
1856 b50a2b46 2022-12-29 stsp 	struct imsg imsg;
1857 b50a2b46 2022-12-29 stsp 
1858 b50a2b46 2022-12-29 stsp 	if (proc->iev.ibuf.fd != fd)
1859 b50a2b46 2022-12-29 stsp 		fatalx("%s: unexpected fd %d", __func__, fd);
1860 b50a2b46 2022-12-29 stsp 
1861 b50a2b46 2022-12-29 stsp 	if (event & EV_READ) {
1862 b50a2b46 2022-12-29 stsp 		if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
1863 b50a2b46 2022-12-29 stsp 			fatal("imsg_read error");
1864 b50a2b46 2022-12-29 stsp 		if (n == 0) {
1865 b50a2b46 2022-12-29 stsp 			/* Connection closed. */
1866 b50a2b46 2022-12-29 stsp 			shut = 1;
1867 b50a2b46 2022-12-29 stsp 			goto done;
1868 b50a2b46 2022-12-29 stsp 		}
1869 b50a2b46 2022-12-29 stsp 	}
1870 b50a2b46 2022-12-29 stsp 
1871 b50a2b46 2022-12-29 stsp 	if (event & EV_WRITE) {
1872 b50a2b46 2022-12-29 stsp 		n = msgbuf_write(&ibuf->w);
1873 b50a2b46 2022-12-29 stsp 		if (n == -1 && errno != EAGAIN)
1874 b50a2b46 2022-12-29 stsp 			fatal("msgbuf_write");
1875 b50a2b46 2022-12-29 stsp 		if (n == 0) {
1876 b50a2b46 2022-12-29 stsp 			/* Connection closed. */
1877 b50a2b46 2022-12-29 stsp 			shut = 1;
1878 b50a2b46 2022-12-29 stsp 			goto done;
1879 b50a2b46 2022-12-29 stsp 		}
1880 b50a2b46 2022-12-29 stsp 	}
1881 b50a2b46 2022-12-29 stsp 
1882 b50a2b46 2022-12-29 stsp 	for (;;) {
1883 b50a2b46 2022-12-29 stsp 		const struct got_error *err = NULL;
1884 b50a2b46 2022-12-29 stsp 		struct gotd_client *client = NULL;
1885 b50a2b46 2022-12-29 stsp 		uint32_t client_id = 0;
1886 b50a2b46 2022-12-29 stsp 		int do_disconnect = 0;
1887 b50a2b46 2022-12-29 stsp 
1888 b50a2b46 2022-12-29 stsp 		if ((n = imsg_get(ibuf, &imsg)) == -1)
1889 b50a2b46 2022-12-29 stsp 			fatal("%s: imsg_get error", __func__);
1890 b50a2b46 2022-12-29 stsp 		if (n == 0)	/* No more messages. */
1891 b50a2b46 2022-12-29 stsp 			break;
1892 b50a2b46 2022-12-29 stsp 
1893 b50a2b46 2022-12-29 stsp 		switch (imsg.hdr.type) {
1894 b50a2b46 2022-12-29 stsp 		case GOTD_IMSG_ERROR:
1895 b50a2b46 2022-12-29 stsp 			do_disconnect = 1;
1896 b50a2b46 2022-12-29 stsp 			err = gotd_imsg_recv_error(&client_id, &imsg);
1897 b50a2b46 2022-12-29 stsp 			break;
1898 b50a2b46 2022-12-29 stsp 		case GOTD_IMSG_CONNECT:
1899 b50a2b46 2022-12-29 stsp 			err = recv_connect(&client_id, &imsg);
1900 b50a2b46 2022-12-29 stsp 			break;
1901 b50a2b46 2022-12-29 stsp 		default:
1902 b50a2b46 2022-12-29 stsp 			log_debug("unexpected imsg %d", imsg.hdr.type);
1903 b50a2b46 2022-12-29 stsp 			break;
1904 b50a2b46 2022-12-29 stsp 		}
1905 b50a2b46 2022-12-29 stsp 
1906 b50a2b46 2022-12-29 stsp 		client = find_client(client_id);
1907 b50a2b46 2022-12-29 stsp 		if (client == NULL) {
1908 b50a2b46 2022-12-29 stsp 			log_warnx("%s: client not found", __func__);
1909 b50a2b46 2022-12-29 stsp 			imsg_free(&imsg);
1910 b50a2b46 2022-12-29 stsp 			continue;
1911 b50a2b46 2022-12-29 stsp 		}
1912 b50a2b46 2022-12-29 stsp 
1913 b50a2b46 2022-12-29 stsp 		if (err)
1914 b50a2b46 2022-12-29 stsp 			log_warnx("uid %d: %s", client->euid, err->msg);
1915 b50a2b46 2022-12-29 stsp 
1916 b50a2b46 2022-12-29 stsp 		if (do_disconnect) {
1917 b50a2b46 2022-12-29 stsp 			if (err)
1918 b50a2b46 2022-12-29 stsp 				disconnect_on_error(client, err);
1919 b50a2b46 2022-12-29 stsp 			else
1920 b50a2b46 2022-12-29 stsp 				disconnect(client);
1921 b50a2b46 2022-12-29 stsp 		}
1922 b50a2b46 2022-12-29 stsp 
1923 b50a2b46 2022-12-29 stsp 		imsg_free(&imsg);
1924 b50a2b46 2022-12-29 stsp 	}
1925 b50a2b46 2022-12-29 stsp done:
1926 b50a2b46 2022-12-29 stsp 	if (!shut) {
1927 b50a2b46 2022-12-29 stsp 		gotd_imsg_event_add(iev);
1928 b50a2b46 2022-12-29 stsp 	} else {
1929 b50a2b46 2022-12-29 stsp 		/* This pipe is dead. Remove its event handler */
1930 b50a2b46 2022-12-29 stsp 		event_del(&iev->ev);
1931 b50a2b46 2022-12-29 stsp 		event_loopexit(NULL);
1932 b50a2b46 2022-12-29 stsp 	}
1933 b50a2b46 2022-12-29 stsp }
1934 b50a2b46 2022-12-29 stsp 
1935 b50a2b46 2022-12-29 stsp static void
1936 5e25db14 2022-12-29 stsp gotd_dispatch_auth_child(int fd, short event, void *arg)
1937 5e25db14 2022-12-29 stsp {
1938 5e25db14 2022-12-29 stsp 	const struct got_error *err = NULL;
1939 5e25db14 2022-12-29 stsp 	struct gotd_imsgev *iev = arg;
1940 5e25db14 2022-12-29 stsp 	struct imsgbuf *ibuf = &iev->ibuf;
1941 5e25db14 2022-12-29 stsp 	struct gotd_client *client;
1942 5e25db14 2022-12-29 stsp 	struct gotd_repo *repo = NULL;
1943 5e25db14 2022-12-29 stsp 	ssize_t n;
1944 5e25db14 2022-12-29 stsp 	int shut = 0;
1945 5e25db14 2022-12-29 stsp 	struct imsg imsg;
1946 5e25db14 2022-12-29 stsp 	uint32_t client_id = 0;
1947 5e25db14 2022-12-29 stsp 	int do_disconnect = 0;
1948 5e25db14 2022-12-29 stsp 	enum gotd_procid proc_type;
1949 5e25db14 2022-12-29 stsp 
1950 5e25db14 2022-12-29 stsp 	client = find_client_by_proc_fd(fd);
1951 5e25db14 2022-12-29 stsp 	if (client == NULL)
1952 5e25db14 2022-12-29 stsp 		fatalx("cannot find client for fd %d", fd);
1953 5e25db14 2022-12-29 stsp 
1954 5e25db14 2022-12-29 stsp 	if (client->auth == NULL)
1955 5e25db14 2022-12-29 stsp 		fatalx("cannot find auth child process for fd %d", fd);
1956 5e25db14 2022-12-29 stsp 
1957 5e25db14 2022-12-29 stsp 	if (event & EV_READ) {
1958 5e25db14 2022-12-29 stsp 		if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
1959 5e25db14 2022-12-29 stsp 			fatal("imsg_read error");
1960 5e25db14 2022-12-29 stsp 		if (n == 0) {
1961 5e25db14 2022-12-29 stsp 			/* Connection closed. */
1962 5e25db14 2022-12-29 stsp 			shut = 1;
1963 5e25db14 2022-12-29 stsp 			goto done;
1964 5e25db14 2022-12-29 stsp 		}
1965 5e25db14 2022-12-29 stsp 	}
1966 5e25db14 2022-12-29 stsp 
1967 5e25db14 2022-12-29 stsp 	if (event & EV_WRITE) {
1968 5e25db14 2022-12-29 stsp 		n = msgbuf_write(&ibuf->w);
1969 5e25db14 2022-12-29 stsp 		if (n == -1 && errno != EAGAIN)
1970 5e25db14 2022-12-29 stsp 			fatal("msgbuf_write");
1971 5e25db14 2022-12-29 stsp 		if (n == 0) {
1972 5e25db14 2022-12-29 stsp 			/* Connection closed. */
1973 5e25db14 2022-12-29 stsp 			shut = 1;
1974 5e25db14 2022-12-29 stsp 		}
1975 5e25db14 2022-12-29 stsp 		goto done;
1976 5e25db14 2022-12-29 stsp 	}
1977 5e25db14 2022-12-29 stsp 
1978 5e25db14 2022-12-29 stsp 	if (client->auth->iev.ibuf.fd != fd)
1979 5e25db14 2022-12-29 stsp 		fatalx("%s: unexpected fd %d", __func__, fd);
1980 5e25db14 2022-12-29 stsp 
1981 5e25db14 2022-12-29 stsp 	if ((n = imsg_get(ibuf, &imsg)) == -1)
1982 5e25db14 2022-12-29 stsp 		fatal("%s: imsg_get error", __func__);
1983 5e25db14 2022-12-29 stsp 	if (n == 0)	/* No more messages. */
1984 5e25db14 2022-12-29 stsp 		return;
1985 5e25db14 2022-12-29 stsp 
1986 5e25db14 2022-12-29 stsp 	evtimer_del(&client->tmo);
1987 5e25db14 2022-12-29 stsp 
1988 5e25db14 2022-12-29 stsp 	switch (imsg.hdr.type) {
1989 5e25db14 2022-12-29 stsp 	case GOTD_IMSG_ERROR:
1990 5e25db14 2022-12-29 stsp 		do_disconnect = 1;
1991 5e25db14 2022-12-29 stsp 		err = gotd_imsg_recv_error(&client_id, &imsg);
1992 5e25db14 2022-12-29 stsp 		break;
1993 5e25db14 2022-12-29 stsp 	case GOTD_IMSG_ACCESS_GRANTED:
1994 5e25db14 2022-12-29 stsp 		break;
1995 5e25db14 2022-12-29 stsp 	default:
1996 5e25db14 2022-12-29 stsp 		do_disconnect = 1;
1997 5e25db14 2022-12-29 stsp 		log_debug("unexpected imsg %d", imsg.hdr.type);
1998 5e25db14 2022-12-29 stsp 		break;
1999 5e25db14 2022-12-29 stsp 	}
2000 5e25db14 2022-12-29 stsp 
2001 5e25db14 2022-12-29 stsp 	if (!verify_imsg_src(client, client->auth, &imsg)) {
2002 5e25db14 2022-12-29 stsp 		do_disconnect = 1;
2003 5e25db14 2022-12-29 stsp 		log_debug("dropping imsg type %d from PID %d",
2004 5e25db14 2022-12-29 stsp 		    imsg.hdr.type, client->auth->pid);
2005 5e25db14 2022-12-29 stsp 	}
2006 5e25db14 2022-12-29 stsp 	imsg_free(&imsg);
2007 5e25db14 2022-12-29 stsp 
2008 5e25db14 2022-12-29 stsp 	if (do_disconnect) {
2009 5e25db14 2022-12-29 stsp 		if (err)
2010 5e25db14 2022-12-29 stsp 			disconnect_on_error(client, err);
2011 5e25db14 2022-12-29 stsp 		else
2012 5e25db14 2022-12-29 stsp 			disconnect(client);
2013 5e25db14 2022-12-29 stsp 		goto done;
2014 5e25db14 2022-12-29 stsp 	}
2015 5e25db14 2022-12-29 stsp 
2016 5e25db14 2022-12-29 stsp 	repo = find_repo_by_name(client->auth->repo_name);
2017 5e25db14 2022-12-29 stsp 	if (repo == NULL) {
2018 5e25db14 2022-12-29 stsp 		err = got_error(GOT_ERR_NOT_GIT_REPO);
2019 5e25db14 2022-12-29 stsp 		goto done;
2020 5e25db14 2022-12-29 stsp 	}
2021 5e25db14 2022-12-29 stsp 	kill_auth_proc(client);
2022 5e25db14 2022-12-29 stsp 
2023 5e25db14 2022-12-29 stsp 	log_info("authenticated uid %d for repository %s\n",
2024 5e25db14 2022-12-29 stsp 	    client->euid, repo->name);
2025 5e25db14 2022-12-29 stsp 
2026 5e25db14 2022-12-29 stsp 	if (client->required_auth & GOTD_AUTH_WRITE)
2027 5e25db14 2022-12-29 stsp 		proc_type = PROC_REPO_WRITE;
2028 5e25db14 2022-12-29 stsp 	else
2029 5e25db14 2022-12-29 stsp 		proc_type = PROC_REPO_READ;
2030 5e25db14 2022-12-29 stsp 
2031 7fdc3e58 2022-12-30 mark 	err = start_repo_child(client, proc_type, repo, gotd.argv0,
2032 7fdc3e58 2022-12-30 mark 	    gotd.confpath, gotd.daemonize, gotd.verbosity);
2033 5e25db14 2022-12-29 stsp done:
2034 5e25db14 2022-12-29 stsp 	if (err)
2035 5e25db14 2022-12-29 stsp 		log_warnx("uid %d: %s", client->euid, err->msg);
2036 5e25db14 2022-12-29 stsp 
2037 5e25db14 2022-12-29 stsp 	/* We might have killed the auth process by now. */
2038 5e25db14 2022-12-29 stsp 	if (client->auth != NULL) {
2039 5e25db14 2022-12-29 stsp 		if (!shut) {
2040 5e25db14 2022-12-29 stsp 			gotd_imsg_event_add(iev);
2041 5e25db14 2022-12-29 stsp 		} else {
2042 5e25db14 2022-12-29 stsp 			/* This pipe is dead. Remove its event handler */
2043 5e25db14 2022-12-29 stsp 			event_del(&iev->ev);
2044 5e25db14 2022-12-29 stsp 		}
2045 5e25db14 2022-12-29 stsp 	}
2046 5e25db14 2022-12-29 stsp }
2047 5e25db14 2022-12-29 stsp 
2048 5e25db14 2022-12-29 stsp static void
2049 b50a2b46 2022-12-29 stsp gotd_dispatch_repo_child(int fd, short event, void *arg)
2050 b50a2b46 2022-12-29 stsp {
2051 b50a2b46 2022-12-29 stsp 	struct gotd_imsgev *iev = arg;
2052 b50a2b46 2022-12-29 stsp 	struct imsgbuf *ibuf = &iev->ibuf;
2053 13b2bc37 2022-10-23 stsp 	struct gotd_child_proc *proc = NULL;
2054 b50a2b46 2022-12-29 stsp 	struct gotd_client *client = NULL;
2055 13b2bc37 2022-10-23 stsp 	ssize_t n;
2056 13b2bc37 2022-10-23 stsp 	int shut = 0;
2057 13b2bc37 2022-10-23 stsp 	struct imsg imsg;
2058 13b2bc37 2022-10-23 stsp 
2059 13b2bc37 2022-10-23 stsp 	if (event & EV_READ) {
2060 13b2bc37 2022-10-23 stsp 		if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
2061 13b2bc37 2022-10-23 stsp 			fatal("imsg_read error");
2062 13b2bc37 2022-10-23 stsp 		if (n == 0) {
2063 13b2bc37 2022-10-23 stsp 			/* Connection closed. */
2064 13b2bc37 2022-10-23 stsp 			shut = 1;
2065 13b2bc37 2022-10-23 stsp 			goto done;
2066 13b2bc37 2022-10-23 stsp 		}
2067 13b2bc37 2022-10-23 stsp 	}
2068 13b2bc37 2022-10-23 stsp 
2069 13b2bc37 2022-10-23 stsp 	if (event & EV_WRITE) {
2070 13b2bc37 2022-10-23 stsp 		n = msgbuf_write(&ibuf->w);
2071 13b2bc37 2022-10-23 stsp 		if (n == -1 && errno != EAGAIN)
2072 13b2bc37 2022-10-23 stsp 			fatal("msgbuf_write");
2073 13b2bc37 2022-10-23 stsp 		if (n == 0) {
2074 13b2bc37 2022-10-23 stsp 			/* Connection closed. */
2075 13b2bc37 2022-10-23 stsp 			shut = 1;
2076 13b2bc37 2022-10-23 stsp 			goto done;
2077 13b2bc37 2022-10-23 stsp 		}
2078 13b2bc37 2022-10-23 stsp 	}
2079 13b2bc37 2022-10-23 stsp 
2080 b50a2b46 2022-12-29 stsp 	client = find_client_by_proc_fd(fd);
2081 b50a2b46 2022-12-29 stsp 	if (client == NULL)
2082 b50a2b46 2022-12-29 stsp 		fatalx("cannot find client for fd %d", fd);
2083 b50a2b46 2022-12-29 stsp 
2084 b50a2b46 2022-12-29 stsp 	proc = get_client_proc(client);
2085 13b2bc37 2022-10-23 stsp 	if (proc == NULL)
2086 13b2bc37 2022-10-23 stsp 		fatalx("cannot find child process for fd %d", fd);
2087 13b2bc37 2022-10-23 stsp 
2088 13b2bc37 2022-10-23 stsp 	for (;;) {
2089 13b2bc37 2022-10-23 stsp 		const struct got_error *err = NULL;
2090 13b2bc37 2022-10-23 stsp 		uint32_t client_id = 0;
2091 13b2bc37 2022-10-23 stsp 		int do_disconnect = 0;
2092 b50a2b46 2022-12-29 stsp 		int do_list_refs = 0, do_ref_updates = 0, do_ref_update = 0;
2093 13b2bc37 2022-10-23 stsp 		int do_packfile_install = 0;
2094 13b2bc37 2022-10-23 stsp 
2095 13b2bc37 2022-10-23 stsp 		if ((n = imsg_get(ibuf, &imsg)) == -1)
2096 13b2bc37 2022-10-23 stsp 			fatal("%s: imsg_get error", __func__);
2097 13b2bc37 2022-10-23 stsp 		if (n == 0)	/* No more messages. */
2098 13b2bc37 2022-10-23 stsp 			break;
2099 13b2bc37 2022-10-23 stsp 
2100 13b2bc37 2022-10-23 stsp 		switch (imsg.hdr.type) {
2101 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_ERROR:
2102 13b2bc37 2022-10-23 stsp 			do_disconnect = 1;
2103 13b2bc37 2022-10-23 stsp 			err = gotd_imsg_recv_error(&client_id, &imsg);
2104 13b2bc37 2022-10-23 stsp 			break;
2105 b50a2b46 2022-12-29 stsp 		case GOTD_IMSG_REPO_CHILD_READY:
2106 b50a2b46 2022-12-29 stsp 			do_list_refs = 1;
2107 d93ecf7d 2022-12-14 stsp 			break;
2108 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_PACKFILE_DONE:
2109 13b2bc37 2022-10-23 stsp 			do_disconnect = 1;
2110 13b2bc37 2022-10-23 stsp 			err = recv_packfile_done(&client_id, &imsg);
2111 13b2bc37 2022-10-23 stsp 			break;
2112 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_PACKFILE_INSTALL:
2113 13b2bc37 2022-10-23 stsp 			err = recv_packfile_install(&client_id, &imsg);
2114 13b2bc37 2022-10-23 stsp 			if (err == NULL)
2115 13b2bc37 2022-10-23 stsp 				do_packfile_install = 1;
2116 13b2bc37 2022-10-23 stsp 			break;
2117 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_REF_UPDATES_START:
2118 13b2bc37 2022-10-23 stsp 			err = recv_ref_updates_start(&client_id, &imsg);
2119 13b2bc37 2022-10-23 stsp 			if (err == NULL)
2120 13b2bc37 2022-10-23 stsp 				do_ref_updates = 1;
2121 13b2bc37 2022-10-23 stsp 			break;
2122 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_REF_UPDATE:
2123 13b2bc37 2022-10-23 stsp 			err = recv_ref_update(&client_id, &imsg);
2124 13b2bc37 2022-10-23 stsp 			if (err == NULL)
2125 13b2bc37 2022-10-23 stsp 				do_ref_update = 1;
2126 13b2bc37 2022-10-23 stsp 			break;
2127 13b2bc37 2022-10-23 stsp 		default:
2128 13b2bc37 2022-10-23 stsp 			log_debug("unexpected imsg %d", imsg.hdr.type);
2129 13b2bc37 2022-10-23 stsp 			break;
2130 13b2bc37 2022-10-23 stsp 		}
2131 13b2bc37 2022-10-23 stsp 
2132 13b2bc37 2022-10-23 stsp 		if (!verify_imsg_src(client, proc, &imsg)) {
2133 13b2bc37 2022-10-23 stsp 			log_debug("dropping imsg type %d from PID %d",
2134 13b2bc37 2022-10-23 stsp 			    imsg.hdr.type, proc->pid);
2135 13b2bc37 2022-10-23 stsp 			imsg_free(&imsg);
2136 13b2bc37 2022-10-23 stsp 			continue;
2137 13b2bc37 2022-10-23 stsp 		}
2138 13b2bc37 2022-10-23 stsp 		if (err)
2139 13b2bc37 2022-10-23 stsp 			log_warnx("uid %d: %s", client->euid, err->msg);
2140 13b2bc37 2022-10-23 stsp 
2141 13b2bc37 2022-10-23 stsp 		if (do_disconnect) {
2142 13b2bc37 2022-10-23 stsp 			if (err)
2143 13b2bc37 2022-10-23 stsp 				disconnect_on_error(client, err);
2144 13b2bc37 2022-10-23 stsp 			else
2145 13b2bc37 2022-10-23 stsp 				disconnect(client);
2146 36c7cfbb 2022-11-04 stsp 		} else {
2147 b50a2b46 2022-12-29 stsp 			if (do_list_refs)
2148 b50a2b46 2022-12-29 stsp 				err = list_refs_request(client, iev);
2149 b50a2b46 2022-12-29 stsp 			else if (do_packfile_install)
2150 eec68231 2022-12-14 stsp 				err = install_pack(client, proc->repo_path,
2151 36c7cfbb 2022-11-04 stsp 				    &imsg);
2152 36c7cfbb 2022-11-04 stsp 			else if (do_ref_updates)
2153 36c7cfbb 2022-11-04 stsp 				err = begin_ref_updates(client, &imsg);
2154 36c7cfbb 2022-11-04 stsp 			else if (do_ref_update)
2155 eec68231 2022-12-14 stsp 				err = update_ref(client, proc->repo_path,
2156 36c7cfbb 2022-11-04 stsp 				    &imsg);
2157 36c7cfbb 2022-11-04 stsp 			if (err)
2158 36c7cfbb 2022-11-04 stsp 				log_warnx("uid %d: %s", client->euid, err->msg);
2159 36c7cfbb 2022-11-04 stsp 		}
2160 13b2bc37 2022-10-23 stsp 		imsg_free(&imsg);
2161 13b2bc37 2022-10-23 stsp 	}
2162 13b2bc37 2022-10-23 stsp done:
2163 13b2bc37 2022-10-23 stsp 	if (!shut) {
2164 13b2bc37 2022-10-23 stsp 		gotd_imsg_event_add(iev);
2165 13b2bc37 2022-10-23 stsp 	} else {
2166 13b2bc37 2022-10-23 stsp 		/* This pipe is dead. Remove its event handler */
2167 13b2bc37 2022-10-23 stsp 		event_del(&iev->ev);
2168 13b2bc37 2022-10-23 stsp 		event_loopexit(NULL);
2169 13b2bc37 2022-10-23 stsp 	}
2170 13b2bc37 2022-10-23 stsp }
2171 13b2bc37 2022-10-23 stsp 
2172 13b2bc37 2022-10-23 stsp static pid_t
2173 eec68231 2022-12-14 stsp start_child(enum gotd_procid proc_id, const char *repo_path,
2174 585362fd 2022-10-31 op     char *argv0, const char *confpath, int fd, int daemonize, int verbosity)
2175 13b2bc37 2022-10-23 stsp {
2176 585362fd 2022-10-31 op 	char	*argv[11];
2177 13b2bc37 2022-10-23 stsp 	int	 argc = 0;
2178 13b2bc37 2022-10-23 stsp 	pid_t	 pid;
2179 13b2bc37 2022-10-23 stsp 
2180 13b2bc37 2022-10-23 stsp 	switch (pid = fork()) {
2181 13b2bc37 2022-10-23 stsp 	case -1:
2182 13b2bc37 2022-10-23 stsp 		fatal("cannot fork");
2183 13b2bc37 2022-10-23 stsp 	case 0:
2184 13b2bc37 2022-10-23 stsp 		break;
2185 13b2bc37 2022-10-23 stsp 	default:
2186 13b2bc37 2022-10-23 stsp 		close(fd);
2187 13b2bc37 2022-10-23 stsp 		return pid;
2188 13b2bc37 2022-10-23 stsp 	}
2189 13b2bc37 2022-10-23 stsp 
2190 8c6fc146 2022-11-17 stsp 	if (fd != GOTD_FILENO_MSG_PIPE) {
2191 8c6fc146 2022-11-17 stsp 		if (dup2(fd, GOTD_FILENO_MSG_PIPE) == -1)
2192 13b2bc37 2022-10-23 stsp 			fatal("cannot setup imsg fd");
2193 13b2bc37 2022-10-23 stsp 	} else if (fcntl(fd, F_SETFD, 0) == -1)
2194 13b2bc37 2022-10-23 stsp 		fatal("cannot setup imsg fd");
2195 13b2bc37 2022-10-23 stsp 
2196 13b2bc37 2022-10-23 stsp 	argv[argc++] = argv0;
2197 13b2bc37 2022-10-23 stsp 	switch (proc_id) {
2198 d93ecf7d 2022-12-14 stsp 	case PROC_LISTEN:
2199 d93ecf7d 2022-12-14 stsp 		argv[argc++] = (char *)"-L";
2200 d93ecf7d 2022-12-14 stsp 		break;
2201 5e25db14 2022-12-29 stsp 	case PROC_AUTH:
2202 5e25db14 2022-12-29 stsp 		argv[argc++] = (char *)"-A";
2203 5e25db14 2022-12-29 stsp 		break;
2204 13b2bc37 2022-10-23 stsp 	case PROC_REPO_READ:
2205 13b2bc37 2022-10-23 stsp 		argv[argc++] = (char *)"-R";
2206 13b2bc37 2022-10-23 stsp 		break;
2207 13b2bc37 2022-10-23 stsp 	case PROC_REPO_WRITE:
2208 13b2bc37 2022-10-23 stsp 		argv[argc++] = (char *)"-W";
2209 13b2bc37 2022-10-23 stsp 		break;
2210 13b2bc37 2022-10-23 stsp 	default:
2211 13b2bc37 2022-10-23 stsp 		fatalx("invalid process id %d", proc_id);
2212 13b2bc37 2022-10-23 stsp 	}
2213 13b2bc37 2022-10-23 stsp 
2214 585362fd 2022-10-31 op 	argv[argc++] = (char *)"-f";
2215 585362fd 2022-10-31 op 	argv[argc++] = (char *)confpath;
2216 585362fd 2022-10-31 op 
2217 eec68231 2022-12-14 stsp 	if (repo_path) {
2218 d93ecf7d 2022-12-14 stsp 		argv[argc++] = (char *)"-P";
2219 eec68231 2022-12-14 stsp 		argv[argc++] = (char *)repo_path;
2220 d93ecf7d 2022-12-14 stsp 	}
2221 13b2bc37 2022-10-23 stsp 
2222 13b2bc37 2022-10-23 stsp 	if (!daemonize)
2223 13b2bc37 2022-10-23 stsp 		argv[argc++] = (char *)"-d";
2224 13b2bc37 2022-10-23 stsp 	if (verbosity > 0)
2225 13b2bc37 2022-10-23 stsp 		argv[argc++] = (char *)"-v";
2226 13b2bc37 2022-10-23 stsp 	if (verbosity > 1)
2227 13b2bc37 2022-10-23 stsp 		argv[argc++] = (char *)"-v";
2228 13b2bc37 2022-10-23 stsp 	argv[argc++] = NULL;
2229 13b2bc37 2022-10-23 stsp 
2230 13b2bc37 2022-10-23 stsp 	execvp(argv0, argv);
2231 13b2bc37 2022-10-23 stsp 	fatal("execvp");
2232 13b2bc37 2022-10-23 stsp }
2233 13b2bc37 2022-10-23 stsp 
2234 13b2bc37 2022-10-23 stsp static void
2235 d93ecf7d 2022-12-14 stsp start_listener(char *argv0, const char *confpath, int daemonize, int verbosity)
2236 d93ecf7d 2022-12-14 stsp {
2237 b50a2b46 2022-12-29 stsp 	struct gotd_child_proc *proc = &gotd.listen_proc;
2238 d93ecf7d 2022-12-14 stsp 
2239 d93ecf7d 2022-12-14 stsp 	proc->type = PROC_LISTEN;
2240 d93ecf7d 2022-12-14 stsp 
2241 d93ecf7d 2022-12-14 stsp 	if (socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK,
2242 d93ecf7d 2022-12-14 stsp 	    PF_UNSPEC, proc->pipe) == -1)
2243 d93ecf7d 2022-12-14 stsp 		fatal("socketpair");
2244 d93ecf7d 2022-12-14 stsp 
2245 d93ecf7d 2022-12-14 stsp 	proc->pid = start_child(proc->type, NULL, argv0, confpath,
2246 d93ecf7d 2022-12-14 stsp 	    proc->pipe[1], daemonize, verbosity);
2247 d93ecf7d 2022-12-14 stsp 	imsg_init(&proc->iev.ibuf, proc->pipe[0]);
2248 b50a2b46 2022-12-29 stsp 	proc->iev.handler = gotd_dispatch_listener;
2249 d93ecf7d 2022-12-14 stsp 	proc->iev.events = EV_READ;
2250 d93ecf7d 2022-12-14 stsp 	proc->iev.handler_arg = NULL;
2251 d93ecf7d 2022-12-14 stsp }
2252 d93ecf7d 2022-12-14 stsp 
2253 b50a2b46 2022-12-29 stsp static const struct got_error *
2254 b50a2b46 2022-12-29 stsp start_repo_child(struct gotd_client *client, enum gotd_procid proc_type,
2255 b50a2b46 2022-12-29 stsp     struct gotd_repo *repo, char *argv0, const char *confpath,
2256 585362fd 2022-10-31 op     int daemonize, int verbosity)
2257 13b2bc37 2022-10-23 stsp {
2258 13b2bc37 2022-10-23 stsp 	struct gotd_child_proc *proc;
2259 13b2bc37 2022-10-23 stsp 
2260 b50a2b46 2022-12-29 stsp 	if (proc_type != PROC_REPO_READ && proc_type != PROC_REPO_WRITE)
2261 b50a2b46 2022-12-29 stsp 		return got_error_msg(GOT_ERR_NOT_IMPL, "bad process type");
2262 7fdc3e58 2022-12-30 mark 
2263 b50a2b46 2022-12-29 stsp 	proc = calloc(1, sizeof(*proc));
2264 b50a2b46 2022-12-29 stsp 	if (proc == NULL)
2265 b50a2b46 2022-12-29 stsp 		return got_error_from_errno("calloc");
2266 13b2bc37 2022-10-23 stsp 
2267 b50a2b46 2022-12-29 stsp 	proc->type = proc_type;
2268 b50a2b46 2022-12-29 stsp 	if (strlcpy(proc->repo_name, repo->name,
2269 b50a2b46 2022-12-29 stsp 	    sizeof(proc->repo_name)) >= sizeof(proc->repo_name))
2270 b50a2b46 2022-12-29 stsp 		fatalx("repository name too long: %s", repo->name);
2271 b50a2b46 2022-12-29 stsp 	log_debug("starting %s for repository %s",
2272 b50a2b46 2022-12-29 stsp 	    proc->type == PROC_REPO_READ ? "reader" : "writer", repo->name);
2273 b50a2b46 2022-12-29 stsp 	if (realpath(repo->path, proc->repo_path) == NULL)
2274 b50a2b46 2022-12-29 stsp 		fatal("%s", repo->path);
2275 b50a2b46 2022-12-29 stsp 	if (socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK,
2276 b50a2b46 2022-12-29 stsp 	    PF_UNSPEC, proc->pipe) == -1)
2277 b50a2b46 2022-12-29 stsp 		fatal("socketpair");
2278 b50a2b46 2022-12-29 stsp 	proc->pid = start_child(proc->type, proc->repo_path, argv0,
2279 b50a2b46 2022-12-29 stsp 	    confpath, proc->pipe[1], daemonize, verbosity);
2280 b50a2b46 2022-12-29 stsp 	imsg_init(&proc->iev.ibuf, proc->pipe[0]);
2281 b50a2b46 2022-12-29 stsp 	log_debug("proc %s %s is on fd %d",
2282 b50a2b46 2022-12-29 stsp 	    gotd_proc_names[proc->type], proc->repo_path,
2283 b50a2b46 2022-12-29 stsp 	    proc->pipe[0]);
2284 b50a2b46 2022-12-29 stsp 	proc->iev.handler = gotd_dispatch_repo_child;
2285 b50a2b46 2022-12-29 stsp 	proc->iev.events = EV_READ;
2286 b50a2b46 2022-12-29 stsp 	proc->iev.handler_arg = NULL;
2287 b50a2b46 2022-12-29 stsp 	event_set(&proc->iev.ev, proc->iev.ibuf.fd, EV_READ,
2288 b50a2b46 2022-12-29 stsp 	    gotd_dispatch_repo_child, &proc->iev);
2289 b50a2b46 2022-12-29 stsp 	gotd_imsg_event_add(&proc->iev);
2290 b50a2b46 2022-12-29 stsp 
2291 b50a2b46 2022-12-29 stsp 	if (proc->type == PROC_REPO_READ)
2292 b50a2b46 2022-12-29 stsp 		client->repo_read = proc;
2293 b50a2b46 2022-12-29 stsp 	else
2294 b50a2b46 2022-12-29 stsp 		client->repo_write = proc;
2295 5e25db14 2022-12-29 stsp 
2296 5e25db14 2022-12-29 stsp 	return NULL;
2297 5e25db14 2022-12-29 stsp }
2298 5e25db14 2022-12-29 stsp 
2299 5e25db14 2022-12-29 stsp static const struct got_error *
2300 5e25db14 2022-12-29 stsp start_auth_child(struct gotd_client *client, int required_auth,
2301 5e25db14 2022-12-29 stsp     struct gotd_repo *repo, char *argv0, const char *confpath,
2302 5e25db14 2022-12-29 stsp     int daemonize, int verbosity)
2303 5e25db14 2022-12-29 stsp {
2304 365cf0f3 2022-12-29 stsp 	const struct got_error *err = NULL;
2305 5e25db14 2022-12-29 stsp 	struct gotd_child_proc *proc;
2306 5e25db14 2022-12-29 stsp 	struct gotd_imsg_auth iauth;
2307 365cf0f3 2022-12-29 stsp 	int fd;
2308 5e25db14 2022-12-29 stsp 
2309 5e25db14 2022-12-29 stsp 	memset(&iauth, 0, sizeof(iauth));
2310 365cf0f3 2022-12-29 stsp 
2311 365cf0f3 2022-12-29 stsp 	fd = dup(client->fd);
2312 365cf0f3 2022-12-29 stsp 	if (fd == -1)
2313 365cf0f3 2022-12-29 stsp 		return got_error_from_errno("dup");
2314 5e25db14 2022-12-29 stsp 
2315 5e25db14 2022-12-29 stsp 	proc = calloc(1, sizeof(*proc));
2316 365cf0f3 2022-12-29 stsp 	if (proc == NULL) {
2317 365cf0f3 2022-12-29 stsp 		err = got_error_from_errno("calloc");
2318 365cf0f3 2022-12-29 stsp 		close(fd);
2319 365cf0f3 2022-12-29 stsp 		return err;
2320 365cf0f3 2022-12-29 stsp 	}
2321 5e25db14 2022-12-29 stsp 
2322 5e25db14 2022-12-29 stsp 	proc->type = PROC_AUTH;
2323 5e25db14 2022-12-29 stsp 	if (strlcpy(proc->repo_name, repo->name,
2324 5e25db14 2022-12-29 stsp 	    sizeof(proc->repo_name)) >= sizeof(proc->repo_name))
2325 5e25db14 2022-12-29 stsp 		fatalx("repository name too long: %s", repo->name);
2326 5e25db14 2022-12-29 stsp 	log_debug("starting auth for uid %d repository %s",
2327 5e25db14 2022-12-29 stsp 	    client->euid, repo->name);
2328 5e25db14 2022-12-29 stsp 	if (realpath(repo->path, proc->repo_path) == NULL)
2329 5e25db14 2022-12-29 stsp 		fatal("%s", repo->path);
2330 5e25db14 2022-12-29 stsp 	if (socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK,
2331 5e25db14 2022-12-29 stsp 	    PF_UNSPEC, proc->pipe) == -1)
2332 5e25db14 2022-12-29 stsp 		fatal("socketpair");
2333 5e25db14 2022-12-29 stsp 	proc->pid = start_child(proc->type, proc->repo_path, argv0,
2334 5e25db14 2022-12-29 stsp 	    confpath, proc->pipe[1], daemonize, verbosity);
2335 5e25db14 2022-12-29 stsp 	imsg_init(&proc->iev.ibuf, proc->pipe[0]);
2336 5e25db14 2022-12-29 stsp 	log_debug("proc %s %s is on fd %d",
2337 5e25db14 2022-12-29 stsp 	    gotd_proc_names[proc->type], proc->repo_path,
2338 5e25db14 2022-12-29 stsp 	    proc->pipe[0]);
2339 5e25db14 2022-12-29 stsp 	proc->iev.handler = gotd_dispatch_auth_child;
2340 5e25db14 2022-12-29 stsp 	proc->iev.events = EV_READ;
2341 5e25db14 2022-12-29 stsp 	proc->iev.handler_arg = NULL;
2342 5e25db14 2022-12-29 stsp 	event_set(&proc->iev.ev, proc->iev.ibuf.fd, EV_READ,
2343 5e25db14 2022-12-29 stsp 	    gotd_dispatch_auth_child, &proc->iev);
2344 5e25db14 2022-12-29 stsp 	gotd_imsg_event_add(&proc->iev);
2345 5e25db14 2022-12-29 stsp 
2346 5e25db14 2022-12-29 stsp 	iauth.euid = client->euid;
2347 5e25db14 2022-12-29 stsp 	iauth.egid = client->egid;
2348 5e25db14 2022-12-29 stsp 	iauth.required_auth = required_auth;
2349 5e25db14 2022-12-29 stsp 	iauth.client_id = client->id;
2350 5e25db14 2022-12-29 stsp 	if (gotd_imsg_compose_event(&proc->iev, GOTD_IMSG_AUTHENTICATE,
2351 365cf0f3 2022-12-29 stsp 	    PROC_GOTD, fd, &iauth, sizeof(iauth)) == -1) {
2352 5e25db14 2022-12-29 stsp 		log_warn("imsg compose AUTHENTICATE");
2353 365cf0f3 2022-12-29 stsp 		close(fd);
2354 365cf0f3 2022-12-29 stsp 		/* Let the auth_timeout handler tidy up. */
2355 365cf0f3 2022-12-29 stsp 	}
2356 b50a2b46 2022-12-29 stsp 
2357 5e25db14 2022-12-29 stsp 	client->auth = proc;
2358 5e25db14 2022-12-29 stsp 	client->required_auth = required_auth;
2359 b50a2b46 2022-12-29 stsp 	return NULL;
2360 eec68231 2022-12-14 stsp }
2361 eec68231 2022-12-14 stsp 
2362 eec68231 2022-12-14 stsp static void
2363 eec68231 2022-12-14 stsp apply_unveil_repo_readonly(const char *repo_path)
2364 eec68231 2022-12-14 stsp {
2365 eec68231 2022-12-14 stsp 	if (unveil(repo_path, "r") == -1)
2366 eec68231 2022-12-14 stsp 		fatal("unveil %s", repo_path);
2367 44587340 2022-12-30 stsp 
2368 44587340 2022-12-30 stsp 	if (unveil(NULL, NULL) == -1)
2369 44587340 2022-12-30 stsp 		fatal("unveil");
2370 44587340 2022-12-30 stsp }
2371 44587340 2022-12-30 stsp 
2372 44587340 2022-12-30 stsp static void
2373 44587340 2022-12-30 stsp apply_unveil_none(void)
2374 44587340 2022-12-30 stsp {
2375 44587340 2022-12-30 stsp 	if (unveil("/", "") == -1)
2376 44587340 2022-12-30 stsp 		fatal("unveil");
2377 eec68231 2022-12-14 stsp 
2378 eec68231 2022-12-14 stsp 	if (unveil(NULL, NULL) == -1)
2379 eec68231 2022-12-14 stsp 		fatal("unveil");
2380 13b2bc37 2022-10-23 stsp }
2381 13b2bc37 2022-10-23 stsp 
2382 13b2bc37 2022-10-23 stsp static void
2383 13b2bc37 2022-10-23 stsp apply_unveil(void)
2384 13b2bc37 2022-10-23 stsp {
2385 13b2bc37 2022-10-23 stsp 	struct gotd_repo *repo;
2386 13b2bc37 2022-10-23 stsp 
2387 b50a2b46 2022-12-29 stsp 	if (unveil(gotd.argv0, "x") == -1)
2388 b50a2b46 2022-12-29 stsp 		fatal("unveil %s", gotd.argv0);
2389 b50a2b46 2022-12-29 stsp 
2390 13b2bc37 2022-10-23 stsp 	TAILQ_FOREACH(repo, &gotd.repos, entry) {
2391 13b2bc37 2022-10-23 stsp 		if (unveil(repo->path, "rwc") == -1)
2392 13b2bc37 2022-10-23 stsp 			fatal("unveil %s", repo->path);
2393 13b2bc37 2022-10-23 stsp 	}
2394 13b2bc37 2022-10-23 stsp 
2395 13b2bc37 2022-10-23 stsp 	if (unveil(GOT_TMPDIR_STR, "rwc") == -1)
2396 13b2bc37 2022-10-23 stsp 		fatal("unveil %s", GOT_TMPDIR_STR);
2397 13b2bc37 2022-10-23 stsp 
2398 13b2bc37 2022-10-23 stsp 	if (unveil(NULL, NULL) == -1)
2399 13b2bc37 2022-10-23 stsp 		fatal("unveil");
2400 13b2bc37 2022-10-23 stsp }
2401 13b2bc37 2022-10-23 stsp 
2402 13b2bc37 2022-10-23 stsp int
2403 13b2bc37 2022-10-23 stsp main(int argc, char **argv)
2404 13b2bc37 2022-10-23 stsp {
2405 13b2bc37 2022-10-23 stsp 	const struct got_error *error = NULL;
2406 13b2bc37 2022-10-23 stsp 	int ch, fd = -1, daemonize = 1, verbosity = 0, noaction = 0;
2407 13b2bc37 2022-10-23 stsp 	const char *confpath = GOTD_CONF_PATH;
2408 13b2bc37 2022-10-23 stsp 	char *argv0 = argv[0];
2409 13b2bc37 2022-10-23 stsp 	char title[2048];
2410 ddbe612c 2022-11-17 stsp 	gid_t groups[NGROUPS_MAX];
2411 0ccf3acb 2022-11-16 stsp 	int ngroups = NGROUPS_MAX;
2412 13b2bc37 2022-10-23 stsp 	struct passwd *pw = NULL;
2413 13b2bc37 2022-10-23 stsp 	struct group *gr = NULL;
2414 13b2bc37 2022-10-23 stsp 	char *repo_path = NULL;
2415 13b2bc37 2022-10-23 stsp 	enum gotd_procid proc_id = PROC_GOTD;
2416 13b2bc37 2022-10-23 stsp 	struct event evsigint, evsigterm, evsighup, evsigusr1;
2417 13b2bc37 2022-10-23 stsp 	int *pack_fds = NULL, *temp_fds = NULL;
2418 13b2bc37 2022-10-23 stsp 
2419 13b2bc37 2022-10-23 stsp 	log_init(1, LOG_DAEMON); /* Log to stderr until daemonized. */
2420 13b2bc37 2022-10-23 stsp 
2421 5e25db14 2022-12-29 stsp 	while ((ch = getopt(argc, argv, "Adf:LnP:RvW")) != -1) {
2422 13b2bc37 2022-10-23 stsp 		switch (ch) {
2423 5e25db14 2022-12-29 stsp 		case 'A':
2424 5e25db14 2022-12-29 stsp 			proc_id = PROC_AUTH;
2425 5e25db14 2022-12-29 stsp 			break;
2426 13b2bc37 2022-10-23 stsp 		case 'd':
2427 13b2bc37 2022-10-23 stsp 			daemonize = 0;
2428 13b2bc37 2022-10-23 stsp 			break;
2429 13b2bc37 2022-10-23 stsp 		case 'f':
2430 13b2bc37 2022-10-23 stsp 			confpath = optarg;
2431 13b2bc37 2022-10-23 stsp 			break;
2432 d93ecf7d 2022-12-14 stsp 		case 'L':
2433 d93ecf7d 2022-12-14 stsp 			proc_id = PROC_LISTEN;
2434 d93ecf7d 2022-12-14 stsp 			break;
2435 13b2bc37 2022-10-23 stsp 		case 'n':
2436 13b2bc37 2022-10-23 stsp 			noaction = 1;
2437 13b2bc37 2022-10-23 stsp 			break;
2438 6f319063 2022-10-27 stsp 		case 'P':
2439 6f319063 2022-10-27 stsp 			repo_path = realpath(optarg, NULL);
2440 6f319063 2022-10-27 stsp 			if (repo_path == NULL)
2441 6f319063 2022-10-27 stsp 				fatal("realpath '%s'", optarg);
2442 13b2bc37 2022-10-23 stsp 			break;
2443 13b2bc37 2022-10-23 stsp 		case 'R':
2444 13b2bc37 2022-10-23 stsp 			proc_id = PROC_REPO_READ;
2445 13b2bc37 2022-10-23 stsp 			break;
2446 6f319063 2022-10-27 stsp 		case 'v':
2447 6f319063 2022-10-27 stsp 			if (verbosity < 3)
2448 6f319063 2022-10-27 stsp 				verbosity++;
2449 6f319063 2022-10-27 stsp 			break;
2450 13b2bc37 2022-10-23 stsp 		case 'W':
2451 13b2bc37 2022-10-23 stsp 			proc_id = PROC_REPO_WRITE;
2452 13b2bc37 2022-10-23 stsp 			break;
2453 13b2bc37 2022-10-23 stsp 		default:
2454 13b2bc37 2022-10-23 stsp 			usage();
2455 13b2bc37 2022-10-23 stsp 		}
2456 13b2bc37 2022-10-23 stsp 	}
2457 13b2bc37 2022-10-23 stsp 
2458 13b2bc37 2022-10-23 stsp 	argc -= optind;
2459 13b2bc37 2022-10-23 stsp 	argv += optind;
2460 13b2bc37 2022-10-23 stsp 
2461 13b2bc37 2022-10-23 stsp 	if (argc != 0)
2462 13b2bc37 2022-10-23 stsp 		usage();
2463 13b2bc37 2022-10-23 stsp 
2464 b50a2b46 2022-12-29 stsp 	/* Require an absolute path in argv[0] for reliable re-exec. */
2465 b50a2b46 2022-12-29 stsp 	if (!got_path_is_absolute(argv0))
2466 b50a2b46 2022-12-29 stsp 		fatalx("bad path \"%s\": must be an absolute path", argv0);
2467 b50a2b46 2022-12-29 stsp 
2468 b50a2b46 2022-12-29 stsp 	if (geteuid() && (proc_id == PROC_GOTD || proc_id == PROC_LISTEN))
2469 13b2bc37 2022-10-23 stsp 		fatalx("need root privileges");
2470 13b2bc37 2022-10-23 stsp 
2471 13b2bc37 2022-10-23 stsp 	log_init(daemonize ? 0 : 1, LOG_DAEMON);
2472 13b2bc37 2022-10-23 stsp 	log_setverbose(verbosity);
2473 13b2bc37 2022-10-23 stsp 
2474 13b2bc37 2022-10-23 stsp 	if (parse_config(confpath, proc_id, &gotd) != 0)
2475 13b2bc37 2022-10-23 stsp 		return 1;
2476 13b2bc37 2022-10-23 stsp 
2477 b50a2b46 2022-12-29 stsp 	gotd.argv0 = argv0;
2478 b50a2b46 2022-12-29 stsp 	gotd.daemonize = daemonize;
2479 b50a2b46 2022-12-29 stsp 	gotd.verbosity = verbosity;
2480 b50a2b46 2022-12-29 stsp 	gotd.confpath = confpath;
2481 b50a2b46 2022-12-29 stsp 
2482 13b2bc37 2022-10-23 stsp 	if (proc_id == PROC_GOTD &&
2483 13b2bc37 2022-10-23 stsp 	    (gotd.nrepos == 0 || TAILQ_EMPTY(&gotd.repos)))
2484 13b2bc37 2022-10-23 stsp 		fatalx("no repository defined in configuration file");
2485 13b2bc37 2022-10-23 stsp 
2486 13b2bc37 2022-10-23 stsp 	pw = getpwnam(gotd.user_name);
2487 13b2bc37 2022-10-23 stsp 	if (pw == NULL)
2488 898c8f8f 2022-12-29 op 		fatalx("user %s not found", gotd.user_name);
2489 13b2bc37 2022-10-23 stsp 
2490 13b2bc37 2022-10-23 stsp 	if (pw->pw_uid == 0) {
2491 13b2bc37 2022-10-23 stsp 		fatalx("cannot run %s as %s: the user running %s "
2492 13b2bc37 2022-10-23 stsp 		    "must not be the superuser",
2493 13b2bc37 2022-10-23 stsp 		    getprogname(), pw->pw_name, getprogname());
2494 13b2bc37 2022-10-23 stsp 	}
2495 13b2bc37 2022-10-23 stsp 
2496 ddbe612c 2022-11-17 stsp 	if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups) == -1)
2497 13b2bc37 2022-10-23 stsp 		log_warnx("group membership list truncated");
2498 13b2bc37 2022-10-23 stsp 
2499 ddbe612c 2022-11-17 stsp 	gr = match_group(groups, ngroups, gotd.unix_group_name);
2500 13b2bc37 2022-10-23 stsp 	if (gr == NULL) {
2501 13b2bc37 2022-10-23 stsp 		fatalx("cannot start %s: the user running %s "
2502 13b2bc37 2022-10-23 stsp 		    "must be a secondary member of group %s",
2503 13b2bc37 2022-10-23 stsp 		    getprogname(), getprogname(), gotd.unix_group_name);
2504 13b2bc37 2022-10-23 stsp 	}
2505 13b2bc37 2022-10-23 stsp 	if (gr->gr_gid == pw->pw_gid) {
2506 13b2bc37 2022-10-23 stsp 		fatalx("cannot start %s: the user running %s "
2507 13b2bc37 2022-10-23 stsp 		    "must be a secondary member of group %s, but "
2508 13b2bc37 2022-10-23 stsp 		    "%s is the user's primary group",
2509 13b2bc37 2022-10-23 stsp 		    getprogname(), getprogname(), gotd.unix_group_name,
2510 13b2bc37 2022-10-23 stsp 		    gotd.unix_group_name);
2511 13b2bc37 2022-10-23 stsp 	}
2512 13b2bc37 2022-10-23 stsp 
2513 d93ecf7d 2022-12-14 stsp 	if (proc_id == PROC_LISTEN &&
2514 13b2bc37 2022-10-23 stsp 	    !got_path_is_absolute(gotd.unix_socket_path))
2515 13b2bc37 2022-10-23 stsp 		fatalx("bad unix socket path \"%s\": must be an absolute path",
2516 13b2bc37 2022-10-23 stsp 		    gotd.unix_socket_path);
2517 13b2bc37 2022-10-23 stsp 
2518 13b2bc37 2022-10-23 stsp 	if (noaction)
2519 13b2bc37 2022-10-23 stsp 		return 0;
2520 13b2bc37 2022-10-23 stsp 
2521 b1142068 2022-12-05 stsp 	if (proc_id == PROC_GOTD) {
2522 d93ecf7d 2022-12-14 stsp 		gotd.pid = getpid();
2523 d93ecf7d 2022-12-14 stsp 		snprintf(title, sizeof(title), "%s", gotd_proc_names[proc_id]);
2524 d93ecf7d 2022-12-14 stsp 		start_listener(argv0, confpath, daemonize, verbosity);
2525 d93ecf7d 2022-12-14 stsp 		arc4random_buf(&clients_hash_key, sizeof(clients_hash_key));
2526 d93ecf7d 2022-12-14 stsp 		if (daemonize && daemon(1, 0) == -1)
2527 d93ecf7d 2022-12-14 stsp 			fatal("daemon");
2528 d93ecf7d 2022-12-14 stsp 	} else if (proc_id == PROC_LISTEN) {
2529 d93ecf7d 2022-12-14 stsp 		snprintf(title, sizeof(title), "%s", gotd_proc_names[proc_id]);
2530 b1142068 2022-12-05 stsp 		if (verbosity) {
2531 b1142068 2022-12-05 stsp 			log_info("socket: %s", gotd.unix_socket_path);
2532 b1142068 2022-12-05 stsp 			log_info("user: %s", pw->pw_name);
2533 b1142068 2022-12-05 stsp 			log_info("secondary group: %s", gr->gr_name);
2534 b1142068 2022-12-05 stsp 		}
2535 13b2bc37 2022-10-23 stsp 
2536 13b2bc37 2022-10-23 stsp 		fd = unix_socket_listen(gotd.unix_socket_path, pw->pw_uid,
2537 13b2bc37 2022-10-23 stsp 		    gr->gr_gid);
2538 13b2bc37 2022-10-23 stsp 		if (fd == -1) {
2539 13b2bc37 2022-10-23 stsp 			fatal("cannot listen on unix socket %s",
2540 13b2bc37 2022-10-23 stsp 			    gotd.unix_socket_path);
2541 13b2bc37 2022-10-23 stsp 		}
2542 eec68231 2022-12-14 stsp 		if (daemonize && daemon(0, 0) == -1)
2543 13b2bc37 2022-10-23 stsp 			fatal("daemon");
2544 5e25db14 2022-12-29 stsp 	} else if (proc_id == PROC_AUTH) {
2545 5e25db14 2022-12-29 stsp 		snprintf(title, sizeof(title), "%s %s",
2546 5e25db14 2022-12-29 stsp 		    gotd_proc_names[proc_id], repo_path);
2547 5e25db14 2022-12-29 stsp 		if (daemonize && daemon(0, 0) == -1)
2548 5e25db14 2022-12-29 stsp 			fatal("daemon");
2549 13b2bc37 2022-10-23 stsp 	} else if (proc_id == PROC_REPO_READ || proc_id == PROC_REPO_WRITE) {
2550 13b2bc37 2022-10-23 stsp 		error = got_repo_pack_fds_open(&pack_fds);
2551 13b2bc37 2022-10-23 stsp 		if (error != NULL)
2552 13b2bc37 2022-10-23 stsp 			fatalx("cannot open pack tempfiles: %s", error->msg);
2553 13b2bc37 2022-10-23 stsp 		error = got_repo_temp_fds_open(&temp_fds);
2554 13b2bc37 2022-10-23 stsp 		if (error != NULL)
2555 13b2bc37 2022-10-23 stsp 			fatalx("cannot open pack tempfiles: %s", error->msg);
2556 13b2bc37 2022-10-23 stsp 		if (repo_path == NULL)
2557 13b2bc37 2022-10-23 stsp 			fatalx("repository path not specified");
2558 13b2bc37 2022-10-23 stsp 		snprintf(title, sizeof(title), "%s %s",
2559 13b2bc37 2022-10-23 stsp 		    gotd_proc_names[proc_id], repo_path);
2560 eec68231 2022-12-14 stsp 		if (daemonize && daemon(0, 0) == -1)
2561 13b2bc37 2022-10-23 stsp 			fatal("daemon");
2562 13b2bc37 2022-10-23 stsp 	} else
2563 13b2bc37 2022-10-23 stsp 		fatal("invalid process id %d", proc_id);
2564 13b2bc37 2022-10-23 stsp 
2565 13b2bc37 2022-10-23 stsp 	setproctitle("%s", title);
2566 13b2bc37 2022-10-23 stsp 	log_procinit(title);
2567 13b2bc37 2022-10-23 stsp 
2568 13b2bc37 2022-10-23 stsp 	/* Drop root privileges. */
2569 13b2bc37 2022-10-23 stsp 	if (setgid(pw->pw_gid) == -1)
2570 13b2bc37 2022-10-23 stsp 		fatal("setgid %d failed", pw->pw_gid);
2571 13b2bc37 2022-10-23 stsp 	if (setuid(pw->pw_uid) == -1)
2572 13b2bc37 2022-10-23 stsp 		fatal("setuid %d failed", pw->pw_uid);
2573 13b2bc37 2022-10-23 stsp 
2574 13b2bc37 2022-10-23 stsp 	event_init();
2575 13b2bc37 2022-10-23 stsp 
2576 13b2bc37 2022-10-23 stsp 	switch (proc_id) {
2577 13b2bc37 2022-10-23 stsp 	case PROC_GOTD:
2578 13b2bc37 2022-10-23 stsp #ifndef PROFILE
2579 5e25db14 2022-12-29 stsp 		if (pledge("stdio rpath wpath cpath proc exec "
2580 365cf0f3 2022-12-29 stsp 		    "sendfd recvfd fattr flock unveil", NULL) == -1)
2581 13b2bc37 2022-10-23 stsp 			err(1, "pledge");
2582 13b2bc37 2022-10-23 stsp #endif
2583 13b2bc37 2022-10-23 stsp 		break;
2584 d93ecf7d 2022-12-14 stsp 	case PROC_LISTEN:
2585 d93ecf7d 2022-12-14 stsp #ifndef PROFILE
2586 d93ecf7d 2022-12-14 stsp 		if (pledge("stdio sendfd unix", NULL) == -1)
2587 d93ecf7d 2022-12-14 stsp 			err(1, "pledge");
2588 d93ecf7d 2022-12-14 stsp #endif
2589 d93ecf7d 2022-12-14 stsp 		listen_main(title, fd);
2590 d93ecf7d 2022-12-14 stsp 		/* NOTREACHED */
2591 d93ecf7d 2022-12-14 stsp 		break;
2592 5e25db14 2022-12-29 stsp 	case PROC_AUTH:
2593 5e25db14 2022-12-29 stsp #ifndef PROFILE
2594 44587340 2022-12-30 stsp 		if (pledge("stdio getpw recvfd unix unveil", NULL) == -1)
2595 5e25db14 2022-12-29 stsp 			err(1, "pledge");
2596 5e25db14 2022-12-29 stsp #endif
2597 44587340 2022-12-30 stsp 		/*
2598 44587340 2022-12-30 stsp 		 * We need the "unix" pledge promise for getpeername(2) only.
2599 44587340 2022-12-30 stsp 		 * Ensure that AF_UNIX bind(2) cannot be used by revoking all
2600 44587340 2022-12-30 stsp 		 * filesystem access via unveil(2). Access to password database
2601 44587340 2022-12-30 stsp 		 * files will still work since "getpw" bypasses unveil(2).
2602 44587340 2022-12-30 stsp 		 */
2603 44587340 2022-12-30 stsp 		apply_unveil_none();
2604 44587340 2022-12-30 stsp 
2605 5e25db14 2022-12-29 stsp 		auth_main(title, &gotd.repos, repo_path);
2606 5e25db14 2022-12-29 stsp 		/* NOTREACHED */
2607 5e25db14 2022-12-29 stsp 		break;
2608 13b2bc37 2022-10-23 stsp 	case PROC_REPO_READ:
2609 13b2bc37 2022-10-23 stsp #ifndef PROFILE
2610 eec68231 2022-12-14 stsp 		if (pledge("stdio rpath recvfd unveil", NULL) == -1)
2611 13b2bc37 2022-10-23 stsp 			err(1, "pledge");
2612 13b2bc37 2022-10-23 stsp #endif
2613 eec68231 2022-12-14 stsp 		apply_unveil_repo_readonly(repo_path);
2614 eec68231 2022-12-14 stsp 		repo_read_main(title, repo_path, pack_fds, temp_fds);
2615 13b2bc37 2022-10-23 stsp 		/* NOTREACHED */
2616 13b2bc37 2022-10-23 stsp 		exit(0);
2617 13b2bc37 2022-10-23 stsp 	case PROC_REPO_WRITE:
2618 13b2bc37 2022-10-23 stsp #ifndef PROFILE
2619 eec68231 2022-12-14 stsp 		if (pledge("stdio rpath recvfd unveil", NULL) == -1)
2620 13b2bc37 2022-10-23 stsp 			err(1, "pledge");
2621 13b2bc37 2022-10-23 stsp #endif
2622 eec68231 2022-12-14 stsp 		apply_unveil_repo_readonly(repo_path);
2623 eec68231 2022-12-14 stsp 		repo_write_main(title, repo_path, pack_fds, temp_fds);
2624 13b2bc37 2022-10-23 stsp 		/* NOTREACHED */
2625 13b2bc37 2022-10-23 stsp 		exit(0);
2626 13b2bc37 2022-10-23 stsp 	default:
2627 13b2bc37 2022-10-23 stsp 		fatal("invalid process id %d", proc_id);
2628 13b2bc37 2022-10-23 stsp 	}
2629 13b2bc37 2022-10-23 stsp 
2630 13b2bc37 2022-10-23 stsp 	if (proc_id != PROC_GOTD)
2631 13b2bc37 2022-10-23 stsp 		fatal("invalid process id %d", proc_id);
2632 13b2bc37 2022-10-23 stsp 
2633 13b2bc37 2022-10-23 stsp 	apply_unveil();
2634 13b2bc37 2022-10-23 stsp 
2635 13b2bc37 2022-10-23 stsp 	signal_set(&evsigint, SIGINT, gotd_sighdlr, NULL);
2636 13b2bc37 2022-10-23 stsp 	signal_set(&evsigterm, SIGTERM, gotd_sighdlr, NULL);
2637 13b2bc37 2022-10-23 stsp 	signal_set(&evsighup, SIGHUP, gotd_sighdlr, NULL);
2638 13b2bc37 2022-10-23 stsp 	signal_set(&evsigusr1, SIGUSR1, gotd_sighdlr, NULL);
2639 13b2bc37 2022-10-23 stsp 	signal(SIGPIPE, SIG_IGN);
2640 13b2bc37 2022-10-23 stsp 
2641 13b2bc37 2022-10-23 stsp 	signal_add(&evsigint, NULL);
2642 13b2bc37 2022-10-23 stsp 	signal_add(&evsigterm, NULL);
2643 13b2bc37 2022-10-23 stsp 	signal_add(&evsighup, NULL);
2644 13b2bc37 2022-10-23 stsp 	signal_add(&evsigusr1, NULL);
2645 13b2bc37 2022-10-23 stsp 
2646 b50a2b46 2022-12-29 stsp 	gotd_imsg_event_add(&gotd.listen_proc.iev);
2647 13b2bc37 2022-10-23 stsp 
2648 13b2bc37 2022-10-23 stsp 	event_dispatch();
2649 13b2bc37 2022-10-23 stsp 
2650 13b2bc37 2022-10-23 stsp 	if (pack_fds)
2651 13b2bc37 2022-10-23 stsp 		got_repo_pack_fds_close(pack_fds);
2652 13b2bc37 2022-10-23 stsp 	free(repo_path);
2653 13b2bc37 2022-10-23 stsp 	return 0;
2654 13b2bc37 2022-10-23 stsp }