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