2 13b2bc37 2022-10-23 stsp * Copyright (c) 2022 Stefan Sperling <stsp@openbsd.org>
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.
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.
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>
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 <imsg.h>
33 13b2bc37 2022-10-23 stsp #include <sha1.h>
34 69c6accf 2023-02-04 op #include <sha2.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>
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"
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 1362b0e3 2023-02-04 op #include "got_lib_hash.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"
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 ae7c1b78 2023-01-10 stsp #include "session.h"
64 13b2bc37 2022-10-23 stsp #include "repo_read.h"
65 13b2bc37 2022-10-23 stsp #include "repo_write.h"
67 13b2bc37 2022-10-23 stsp #ifndef nitems
68 13b2bc37 2022-10-23 stsp #define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
71 eac23c30 2023-01-10 stsp enum gotd_client_state {
72 eac23c30 2023-01-10 stsp GOTD_CLIENT_STATE_NEW,
73 eac23c30 2023-01-10 stsp GOTD_CLIENT_STATE_ACCESS_GRANTED,
76 13b2bc37 2022-10-23 stsp struct gotd_client {
77 13b2bc37 2022-10-23 stsp STAILQ_ENTRY(gotd_client) entry;
78 13b2bc37 2022-10-23 stsp enum gotd_client_state state;
79 13b2bc37 2022-10-23 stsp uint32_t id;
81 13b2bc37 2022-10-23 stsp struct gotd_imsgev iev;
82 13b2bc37 2022-10-23 stsp struct event tmo;
85 f7a854cf 2023-01-10 stsp struct gotd_child_proc *repo;
86 5e25db14 2022-12-29 stsp struct gotd_child_proc *auth;
87 ae7c1b78 2023-01-10 stsp struct gotd_child_proc *session;
88 5e25db14 2022-12-29 stsp int required_auth;
90 13b2bc37 2022-10-23 stsp STAILQ_HEAD(gotd_clients, gotd_client);
92 13b2bc37 2022-10-23 stsp static struct gotd_clients gotd_clients[GOTD_CLIENT_TABLE_SIZE];
93 13b2bc37 2022-10-23 stsp static SIPHASH_KEY clients_hash_key;
94 13b2bc37 2022-10-23 stsp volatile int client_cnt;
95 ef4e2f01 2022-12-29 stsp static struct timeval auth_timeout = { 5, 0 };
96 13b2bc37 2022-10-23 stsp static struct gotd gotd;
98 13b2bc37 2022-10-23 stsp void gotd_sighdlr(int sig, short event, void *arg);
99 f1752522 2022-10-29 stsp static void gotd_shutdown(void);
100 ae7c1b78 2023-01-10 stsp static const struct got_error *start_session_child(struct gotd_client *,
101 ae7c1b78 2023-01-10 stsp struct gotd_repo *, char *, const char *, int, int);
102 b50a2b46 2022-12-29 stsp static const struct got_error *start_repo_child(struct gotd_client *,
103 b50a2b46 2022-12-29 stsp enum gotd_procid, struct gotd_repo *, char *, const char *, int, int);
104 5e25db14 2022-12-29 stsp static const struct got_error *start_auth_child(struct gotd_client *, int,
105 5e25db14 2022-12-29 stsp struct gotd_repo *, char *, const char *, int, int);
106 b50a2b46 2022-12-29 stsp static void kill_proc(struct gotd_child_proc *, int);
108 13b2bc37 2022-10-23 stsp __dead static void
111 e9e01966 2023-01-18 stsp fprintf(stderr, "usage: %s [-dnv] [-f config-file]\n", getprogname());
116 13b2bc37 2022-10-23 stsp unix_socket_listen(const char *unix_socket_path, uid_t uid, gid_t gid)
118 13b2bc37 2022-10-23 stsp struct sockaddr_un sun;
119 13b2bc37 2022-10-23 stsp int fd = -1;
120 13b2bc37 2022-10-23 stsp mode_t old_umask, mode;
122 13b2bc37 2022-10-23 stsp fd = socket(AF_UNIX, SOCK_STREAM | SOCK_NONBLOCK| SOCK_CLOEXEC, 0);
123 13b2bc37 2022-10-23 stsp if (fd == -1) {
124 13b2bc37 2022-10-23 stsp log_warn("socket");
128 13b2bc37 2022-10-23 stsp sun.sun_family = AF_UNIX;
129 13b2bc37 2022-10-23 stsp if (strlcpy(sun.sun_path, unix_socket_path,
130 13b2bc37 2022-10-23 stsp sizeof(sun.sun_path)) >= sizeof(sun.sun_path)) {
131 13b2bc37 2022-10-23 stsp log_warnx("%s: name too long", unix_socket_path);
136 13b2bc37 2022-10-23 stsp if (unlink(unix_socket_path) == -1) {
137 13b2bc37 2022-10-23 stsp if (errno != ENOENT) {
138 13b2bc37 2022-10-23 stsp log_warn("unlink %s", unix_socket_path);
144 13b2bc37 2022-10-23 stsp old_umask = umask(S_IXUSR|S_IXGRP|S_IWOTH|S_IROTH|S_IXOTH);
145 6f854dde 2023-01-04 stsp mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH;
147 13b2bc37 2022-10-23 stsp if (bind(fd, (struct sockaddr *)&sun, sizeof(sun)) == -1) {
148 13b2bc37 2022-10-23 stsp log_warn("bind: %s", unix_socket_path);
150 13b2bc37 2022-10-23 stsp umask(old_umask);
154 13b2bc37 2022-10-23 stsp umask(old_umask);
156 13b2bc37 2022-10-23 stsp if (chmod(unix_socket_path, mode) == -1) {
157 13b2bc37 2022-10-23 stsp log_warn("chmod %o %s", mode, unix_socket_path);
159 13b2bc37 2022-10-23 stsp unlink(unix_socket_path);
163 13b2bc37 2022-10-23 stsp if (chown(unix_socket_path, uid, gid) == -1) {
164 13b2bc37 2022-10-23 stsp log_warn("chown %s uid=%d gid=%d", unix_socket_path, uid, gid);
166 13b2bc37 2022-10-23 stsp unlink(unix_socket_path);
170 13b2bc37 2022-10-23 stsp if (listen(fd, GOTD_UNIX_SOCKET_BACKLOG) == -1) {
171 13b2bc37 2022-10-23 stsp log_warn("listen");
173 13b2bc37 2022-10-23 stsp unlink(unix_socket_path);
180 13b2bc37 2022-10-23 stsp static uint64_t
181 13b2bc37 2022-10-23 stsp client_hash(uint32_t client_id)
183 13b2bc37 2022-10-23 stsp return SipHash24(&clients_hash_key, &client_id, sizeof(client_id));
186 13b2bc37 2022-10-23 stsp static void
187 13b2bc37 2022-10-23 stsp add_client(struct gotd_client *client)
189 13b2bc37 2022-10-23 stsp uint64_t slot = client_hash(client->id) % nitems(gotd_clients);
190 13b2bc37 2022-10-23 stsp STAILQ_INSERT_HEAD(&gotd_clients[slot], client, entry);
191 13b2bc37 2022-10-23 stsp client_cnt++;
194 13b2bc37 2022-10-23 stsp static struct gotd_client *
195 13b2bc37 2022-10-23 stsp find_client(uint32_t client_id)
197 13b2bc37 2022-10-23 stsp uint64_t slot;
198 13b2bc37 2022-10-23 stsp struct gotd_client *c;
200 13b2bc37 2022-10-23 stsp slot = client_hash(client_id) % nitems(gotd_clients);
201 13b2bc37 2022-10-23 stsp STAILQ_FOREACH(c, &gotd_clients[slot], entry) {
202 13b2bc37 2022-10-23 stsp if (c->id == client_id)
206 13b2bc37 2022-10-23 stsp return NULL;
209 b50a2b46 2022-12-29 stsp static struct gotd_client *
210 b50a2b46 2022-12-29 stsp find_client_by_proc_fd(int fd)
212 b50a2b46 2022-12-29 stsp uint64_t slot;
214 b50a2b46 2022-12-29 stsp for (slot = 0; slot < nitems(gotd_clients); slot++) {
215 b50a2b46 2022-12-29 stsp struct gotd_client *c;
217 b50a2b46 2022-12-29 stsp STAILQ_FOREACH(c, &gotd_clients[slot], entry) {
218 f7a854cf 2023-01-10 stsp if (c->repo && c->repo->iev.ibuf.fd == fd)
220 5e25db14 2022-12-29 stsp if (c->auth && c->auth->iev.ibuf.fd == fd)
222 ae7c1b78 2023-01-10 stsp if (c->session && c->session->iev.ibuf.fd == fd)
227 13b2bc37 2022-10-23 stsp return NULL;
231 13b2bc37 2022-10-23 stsp client_is_reading(struct gotd_client *client)
233 f7a854cf 2023-01-10 stsp return (client->required_auth &
234 f7a854cf 2023-01-10 stsp (GOTD_AUTH_READ | GOTD_AUTH_WRITE)) == GOTD_AUTH_READ;
238 13b2bc37 2022-10-23 stsp client_is_writing(struct gotd_client *client)
240 f7a854cf 2023-01-10 stsp return (client->required_auth &
241 f7a854cf 2023-01-10 stsp (GOTD_AUTH_READ | GOTD_AUTH_WRITE)) ==
242 f7a854cf 2023-01-10 stsp (GOTD_AUTH_READ | GOTD_AUTH_WRITE);
245 13b2bc37 2022-10-23 stsp static const struct got_error *
246 13b2bc37 2022-10-23 stsp ensure_client_is_not_writing(struct gotd_client *client)
248 13b2bc37 2022-10-23 stsp if (client_is_writing(client)) {
249 13b2bc37 2022-10-23 stsp return got_error_fmt(GOT_ERR_BAD_PACKET,
250 13b2bc37 2022-10-23 stsp "uid %d made a read-request but is writing to "
251 13b2bc37 2022-10-23 stsp "a repository", client->euid);
254 13b2bc37 2022-10-23 stsp return NULL;
257 13b2bc37 2022-10-23 stsp static const struct got_error *
258 13b2bc37 2022-10-23 stsp ensure_client_is_not_reading(struct gotd_client *client)
260 13b2bc37 2022-10-23 stsp if (client_is_reading(client)) {
261 13b2bc37 2022-10-23 stsp return got_error_fmt(GOT_ERR_BAD_PACKET,
262 13b2bc37 2022-10-23 stsp "uid %d made a write-request but is reading from "
263 13b2bc37 2022-10-23 stsp "a repository", client->euid);
266 13b2bc37 2022-10-23 stsp return NULL;
269 b50a2b46 2022-12-29 stsp static void
270 5e25db14 2022-12-29 stsp wait_for_child(pid_t child_pid)
273 b50a2b46 2022-12-29 stsp int status;
275 5e25db14 2022-12-29 stsp log_debug("waiting for child PID %ld to terminate",
276 5e25db14 2022-12-29 stsp (long)child_pid);
279 5e25db14 2022-12-29 stsp pid = waitpid(child_pid, &status, WNOHANG);
280 b50a2b46 2022-12-29 stsp if (pid == -1) {
281 b50a2b46 2022-12-29 stsp if (errno != EINTR && errno != ECHILD)
282 b50a2b46 2022-12-29 stsp fatal("wait");
283 b50a2b46 2022-12-29 stsp } else if (WIFSIGNALED(status)) {
284 b50a2b46 2022-12-29 stsp log_warnx("child PID %ld terminated; signal %d",
285 b50a2b46 2022-12-29 stsp (long)pid, WTERMSIG(status));
287 b50a2b46 2022-12-29 stsp } while (pid != -1 || (pid == -1 && errno == EINTR));
290 ae7c1b78 2023-01-10 stsp static void
291 ae7c1b78 2023-01-10 stsp proc_done(struct gotd_child_proc *proc)
293 ae7c1b78 2023-01-10 stsp event_del(&proc->iev.ev);
294 ae7c1b78 2023-01-10 stsp msgbuf_clear(&proc->iev.ibuf.w);
295 ae7c1b78 2023-01-10 stsp close(proc->iev.ibuf.fd);
296 ae7c1b78 2023-01-10 stsp kill_proc(proc, 0);
297 ae7c1b78 2023-01-10 stsp wait_for_child(proc->pid);
298 ae7c1b78 2023-01-10 stsp free(proc);
301 13b2bc37 2022-10-23 stsp static void
302 5e25db14 2022-12-29 stsp kill_auth_proc(struct gotd_client *client)
304 5e25db14 2022-12-29 stsp struct gotd_child_proc *proc;
306 5e25db14 2022-12-29 stsp if (client->auth == NULL)
309 5e25db14 2022-12-29 stsp proc = client->auth;
310 5e25db14 2022-12-29 stsp client->auth = NULL;
312 ae7c1b78 2023-01-10 stsp proc_done(proc);
315 5e25db14 2022-12-29 stsp static void
316 ae7c1b78 2023-01-10 stsp kill_session_proc(struct gotd_client *client)
318 ae7c1b78 2023-01-10 stsp struct gotd_child_proc *proc;
320 ae7c1b78 2023-01-10 stsp if (client->session == NULL)
323 ae7c1b78 2023-01-10 stsp proc = client->session;
324 ae7c1b78 2023-01-10 stsp client->session = NULL;
326 ae7c1b78 2023-01-10 stsp proc_done(proc);
329 ae7c1b78 2023-01-10 stsp static void
330 13b2bc37 2022-10-23 stsp disconnect(struct gotd_client *client)
332 13b2bc37 2022-10-23 stsp struct gotd_imsg_disconnect idisconnect;
333 f7a854cf 2023-01-10 stsp struct gotd_child_proc *proc = client->repo;
334 b50a2b46 2022-12-29 stsp struct gotd_child_proc *listen_proc = &gotd.listen_proc;
335 13b2bc37 2022-10-23 stsp uint64_t slot;
337 13b2bc37 2022-10-23 stsp log_debug("uid %d: disconnecting", client->euid);
339 5e25db14 2022-12-29 stsp kill_auth_proc(client);
340 ae7c1b78 2023-01-10 stsp kill_session_proc(client);
342 13b2bc37 2022-10-23 stsp idisconnect.client_id = client->id;
343 f1752522 2022-10-29 stsp if (proc) {
344 f1752522 2022-10-29 stsp if (gotd_imsg_compose_event(&proc->iev,
345 f1752522 2022-10-29 stsp GOTD_IMSG_DISCONNECT, PROC_GOTD, -1,
346 f1752522 2022-10-29 stsp &idisconnect, sizeof(idisconnect)) == -1)
347 f1752522 2022-10-29 stsp log_warn("imsg compose DISCONNECT");
349 b50a2b46 2022-12-29 stsp msgbuf_clear(&proc->iev.ibuf.w);
350 b50a2b46 2022-12-29 stsp close(proc->iev.ibuf.fd);
351 b50a2b46 2022-12-29 stsp kill_proc(proc, 0);
352 5e25db14 2022-12-29 stsp wait_for_child(proc->pid);
353 b50a2b46 2022-12-29 stsp free(proc);
354 b50a2b46 2022-12-29 stsp proc = NULL;
357 d93ecf7d 2022-12-14 stsp if (gotd_imsg_compose_event(&listen_proc->iev,
358 d93ecf7d 2022-12-14 stsp GOTD_IMSG_DISCONNECT, PROC_GOTD, -1,
359 d93ecf7d 2022-12-14 stsp &idisconnect, sizeof(idisconnect)) == -1)
360 d93ecf7d 2022-12-14 stsp log_warn("imsg compose DISCONNECT");
362 13b2bc37 2022-10-23 stsp slot = client_hash(client->id) % nitems(gotd_clients);
363 13b2bc37 2022-10-23 stsp STAILQ_REMOVE(&gotd_clients[slot], client, gotd_client, entry);
364 13b2bc37 2022-10-23 stsp imsg_clear(&client->iev.ibuf);
365 13b2bc37 2022-10-23 stsp event_del(&client->iev.ev);
366 13b2bc37 2022-10-23 stsp evtimer_del(&client->tmo);
367 ae7c1b78 2023-01-10 stsp if (client->fd != -1)
368 ae7c1b78 2023-01-10 stsp close(client->fd);
369 ae7c1b78 2023-01-10 stsp else if (client->iev.ibuf.fd != -1)
370 ae7c1b78 2023-01-10 stsp close(client->iev.ibuf.fd);
371 13b2bc37 2022-10-23 stsp free(client);
372 13b2bc37 2022-10-23 stsp client_cnt--;
375 13b2bc37 2022-10-23 stsp static void
376 13b2bc37 2022-10-23 stsp disconnect_on_error(struct gotd_client *client, const struct got_error *err)
378 13b2bc37 2022-10-23 stsp struct imsgbuf ibuf;
380 13b2bc37 2022-10-23 stsp log_warnx("uid %d: %s", client->euid, err->msg);
381 ae7c1b78 2023-01-10 stsp if (err->code != GOT_ERR_EOF && client->fd != -1) {
382 13b2bc37 2022-10-23 stsp imsg_init(&ibuf, client->fd);
383 13b2bc37 2022-10-23 stsp gotd_imsg_send_error(&ibuf, 0, PROC_GOTD, err);
384 13b2bc37 2022-10-23 stsp imsg_clear(&ibuf);
386 13b2bc37 2022-10-23 stsp disconnect(client);
389 f1752522 2022-10-29 stsp static const struct got_error *
390 f1752522 2022-10-29 stsp send_repo_info(struct gotd_imsgev *iev, struct gotd_repo *repo)
392 f1752522 2022-10-29 stsp const struct got_error *err = NULL;
393 f1752522 2022-10-29 stsp struct gotd_imsg_info_repo irepo;
395 f1752522 2022-10-29 stsp memset(&irepo, 0, sizeof(irepo));
397 f1752522 2022-10-29 stsp if (strlcpy(irepo.repo_name, repo->name, sizeof(irepo.repo_name))
398 f1752522 2022-10-29 stsp >= sizeof(irepo.repo_name))
399 f1752522 2022-10-29 stsp return got_error_msg(GOT_ERR_NO_SPACE, "repo name too long");
400 f1752522 2022-10-29 stsp if (strlcpy(irepo.repo_path, repo->path, sizeof(irepo.repo_path))
401 f1752522 2022-10-29 stsp >= sizeof(irepo.repo_path))
402 f1752522 2022-10-29 stsp return got_error_msg(GOT_ERR_NO_SPACE, "repo path too long");
404 f1752522 2022-10-29 stsp if (gotd_imsg_compose_event(iev, GOTD_IMSG_INFO_REPO, PROC_GOTD, -1,
405 f1752522 2022-10-29 stsp &irepo, sizeof(irepo)) == -1) {
406 f1752522 2022-10-29 stsp err = got_error_from_errno("imsg compose INFO_REPO");
408 f1752522 2022-10-29 stsp return err;
411 f1752522 2022-10-29 stsp return NULL;
414 f1752522 2022-10-29 stsp static const struct got_error *
415 f1752522 2022-10-29 stsp send_client_info(struct gotd_imsgev *iev, struct gotd_client *client)
417 f1752522 2022-10-29 stsp const struct got_error *err = NULL;
418 f1752522 2022-10-29 stsp struct gotd_imsg_info_client iclient;
419 f1752522 2022-10-29 stsp struct gotd_child_proc *proc;
421 f1752522 2022-10-29 stsp memset(&iclient, 0, sizeof(iclient));
422 f1752522 2022-10-29 stsp iclient.euid = client->euid;
423 f1752522 2022-10-29 stsp iclient.egid = client->egid;
425 f7a854cf 2023-01-10 stsp proc = client->repo;
426 f1752522 2022-10-29 stsp if (proc) {
427 eec68231 2022-12-14 stsp if (strlcpy(iclient.repo_name, proc->repo_path,
428 f1752522 2022-10-29 stsp sizeof(iclient.repo_name)) >= sizeof(iclient.repo_name)) {
429 f1752522 2022-10-29 stsp return got_error_msg(GOT_ERR_NO_SPACE,
430 f1752522 2022-10-29 stsp "repo name too long");
432 f1752522 2022-10-29 stsp if (client_is_writing(client))
433 f1752522 2022-10-29 stsp iclient.is_writing = 1;
435 ae7c1b78 2023-01-10 stsp iclient.repo_child_pid = proc->pid;
438 ae7c1b78 2023-01-10 stsp if (client->session)
439 ae7c1b78 2023-01-10 stsp iclient.session_child_pid = client->session->pid;
441 f1752522 2022-10-29 stsp if (gotd_imsg_compose_event(iev, GOTD_IMSG_INFO_CLIENT, PROC_GOTD, -1,
442 f1752522 2022-10-29 stsp &iclient, sizeof(iclient)) == -1) {
443 f1752522 2022-10-29 stsp err = got_error_from_errno("imsg compose INFO_CLIENT");
445 f1752522 2022-10-29 stsp return err;
448 f1752522 2022-10-29 stsp return NULL;
451 f1752522 2022-10-29 stsp static const struct got_error *
452 f1752522 2022-10-29 stsp send_info(struct gotd_client *client)
454 f1752522 2022-10-29 stsp const struct got_error *err = NULL;
455 f1752522 2022-10-29 stsp struct gotd_imsg_info info;
456 f1752522 2022-10-29 stsp uint64_t slot;
457 f1752522 2022-10-29 stsp struct gotd_repo *repo;
459 78433331 2023-01-04 stsp if (client->euid != 0)
460 78433331 2023-01-04 stsp return got_error_set_errno(EPERM, "info");
462 f1752522 2022-10-29 stsp info.pid = gotd.pid;
463 f1752522 2022-10-29 stsp info.verbosity = gotd.verbosity;
464 f1752522 2022-10-29 stsp info.nrepos = gotd.nrepos;
465 f1752522 2022-10-29 stsp info.nclients = client_cnt - 1;
467 f1752522 2022-10-29 stsp if (gotd_imsg_compose_event(&client->iev, GOTD_IMSG_INFO, PROC_GOTD, -1,
468 f1752522 2022-10-29 stsp &info, sizeof(info)) == -1) {
469 f1752522 2022-10-29 stsp err = got_error_from_errno("imsg compose INFO");
471 f1752522 2022-10-29 stsp return err;
474 f1752522 2022-10-29 stsp TAILQ_FOREACH(repo, &gotd.repos, entry) {
475 f1752522 2022-10-29 stsp err = send_repo_info(&client->iev, repo);
477 f1752522 2022-10-29 stsp return err;
480 f1752522 2022-10-29 stsp for (slot = 0; slot < nitems(gotd_clients); slot++) {
481 f1752522 2022-10-29 stsp struct gotd_client *c;
482 f1752522 2022-10-29 stsp STAILQ_FOREACH(c, &gotd_clients[slot], entry) {
483 f1752522 2022-10-29 stsp if (c->id == client->id)
485 f1752522 2022-10-29 stsp err = send_client_info(&client->iev, c);
487 f1752522 2022-10-29 stsp return err;
491 f1752522 2022-10-29 stsp return NULL;
494 f1752522 2022-10-29 stsp static const struct got_error *
495 f1752522 2022-10-29 stsp stop_gotd(struct gotd_client *client)
498 f1752522 2022-10-29 stsp if (client->euid != 0)
499 f1752522 2022-10-29 stsp return got_error_set_errno(EPERM, "stop");
501 f1752522 2022-10-29 stsp gotd_shutdown();
502 f1752522 2022-10-29 stsp /* NOTREACHED */
503 0ccf3acb 2022-11-16 stsp return NULL;
506 0ccf3acb 2022-11-16 stsp static struct gotd_repo *
507 0ccf3acb 2022-11-16 stsp find_repo_by_name(const char *repo_name)
509 0ccf3acb 2022-11-16 stsp struct gotd_repo *repo;
510 0ccf3acb 2022-11-16 stsp size_t namelen;
512 0ccf3acb 2022-11-16 stsp TAILQ_FOREACH(repo, &gotd.repos, entry) {
513 0ccf3acb 2022-11-16 stsp namelen = strlen(repo->name);
514 0ccf3acb 2022-11-16 stsp if (strncmp(repo->name, repo_name, namelen) != 0)
516 0ccf3acb 2022-11-16 stsp if (repo_name[namelen] == '\0' ||
517 0ccf3acb 2022-11-16 stsp strcmp(&repo_name[namelen], ".git") == 0)
518 0ccf3acb 2022-11-16 stsp return repo;
521 13b2bc37 2022-10-23 stsp return NULL;
524 13b2bc37 2022-10-23 stsp static const struct got_error *
525 ae7c1b78 2023-01-10 stsp start_client_authentication(struct gotd_client *client, struct imsg *imsg)
527 13b2bc37 2022-10-23 stsp const struct got_error *err;
528 13b2bc37 2022-10-23 stsp struct gotd_imsg_list_refs ireq;
529 0ccf3acb 2022-11-16 stsp struct gotd_repo *repo = NULL;
530 13b2bc37 2022-10-23 stsp size_t datalen;
532 13b2bc37 2022-10-23 stsp log_debug("list-refs request from uid %d", client->euid);
534 eac23c30 2023-01-10 stsp if (client->state != GOTD_CLIENT_STATE_NEW)
535 ae7c1b78 2023-01-10 stsp return got_error_msg(GOT_ERR_BAD_REQUEST,
536 ae7c1b78 2023-01-10 stsp "unexpected list-refs request received");
538 13b2bc37 2022-10-23 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
539 13b2bc37 2022-10-23 stsp if (datalen != sizeof(ireq))
540 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
542 13b2bc37 2022-10-23 stsp memcpy(&ireq, imsg->data, datalen);
544 13b2bc37 2022-10-23 stsp if (ireq.client_is_reading) {
545 13b2bc37 2022-10-23 stsp err = ensure_client_is_not_writing(client);
547 13b2bc37 2022-10-23 stsp return err;
548 0ccf3acb 2022-11-16 stsp repo = find_repo_by_name(ireq.repo_name);
549 0ccf3acb 2022-11-16 stsp if (repo == NULL)
550 0ccf3acb 2022-11-16 stsp return got_error(GOT_ERR_NOT_GIT_REPO);
551 5e25db14 2022-12-29 stsp err = start_auth_child(client, GOTD_AUTH_READ, repo,
552 b50a2b46 2022-12-29 stsp gotd.argv0, gotd.confpath, gotd.daemonize,
553 b50a2b46 2022-12-29 stsp gotd.verbosity);
555 b50a2b46 2022-12-29 stsp return err;
557 13b2bc37 2022-10-23 stsp err = ensure_client_is_not_reading(client);
559 0ccf3acb 2022-11-16 stsp return err;
560 0ccf3acb 2022-11-16 stsp repo = find_repo_by_name(ireq.repo_name);
561 0ccf3acb 2022-11-16 stsp if (repo == NULL)
562 0ccf3acb 2022-11-16 stsp return got_error(GOT_ERR_NOT_GIT_REPO);
563 5e25db14 2022-12-29 stsp err = start_auth_child(client,
564 5e25db14 2022-12-29 stsp GOTD_AUTH_READ | GOTD_AUTH_WRITE,
565 5e25db14 2022-12-29 stsp repo, gotd.argv0, gotd.confpath, gotd.daemonize,
566 b50a2b46 2022-12-29 stsp gotd.verbosity);
568 b50a2b46 2022-12-29 stsp return err;
571 ae7c1b78 2023-01-10 stsp evtimer_add(&client->tmo, &auth_timeout);
573 ae7c1b78 2023-01-10 stsp /* Flow continues upon authentication successs/failure or timeout. */
574 13b2bc37 2022-10-23 stsp return NULL;
577 13b2bc37 2022-10-23 stsp static void
578 13b2bc37 2022-10-23 stsp gotd_request(int fd, short events, void *arg)
580 13b2bc37 2022-10-23 stsp struct gotd_imsgev *iev = arg;
581 13b2bc37 2022-10-23 stsp struct imsgbuf *ibuf = &iev->ibuf;
582 13b2bc37 2022-10-23 stsp struct gotd_client *client = iev->handler_arg;
583 13b2bc37 2022-10-23 stsp const struct got_error *err = NULL;
584 13b2bc37 2022-10-23 stsp struct imsg imsg;
587 13b2bc37 2022-10-23 stsp if (events & EV_WRITE) {
588 13b2bc37 2022-10-23 stsp while (ibuf->w.queued) {
589 13b2bc37 2022-10-23 stsp n = msgbuf_write(&ibuf->w);
590 13b2bc37 2022-10-23 stsp if (n == -1 && errno == EPIPE) {
592 13b2bc37 2022-10-23 stsp * The client has closed its socket.
593 13b2bc37 2022-10-23 stsp * This can happen when Git clients are
594 13b2bc37 2022-10-23 stsp * done sending pack file data.
596 13b2bc37 2022-10-23 stsp msgbuf_clear(&ibuf->w);
598 13b2bc37 2022-10-23 stsp } else if (n == -1 && errno != EAGAIN) {
599 13b2bc37 2022-10-23 stsp err = got_error_from_errno("imsg_flush");
600 13b2bc37 2022-10-23 stsp disconnect_on_error(client, err);
603 13b2bc37 2022-10-23 stsp if (n == 0) {
604 13b2bc37 2022-10-23 stsp /* Connection closed. */
605 13b2bc37 2022-10-23 stsp err = got_error(GOT_ERR_EOF);
606 13b2bc37 2022-10-23 stsp disconnect_on_error(client, err);
611 f1752522 2022-10-29 stsp /* Disconnect gotctl(8) now that messages have been sent. */
612 f1752522 2022-10-29 stsp if (!client_is_reading(client) && !client_is_writing(client)) {
613 f1752522 2022-10-29 stsp disconnect(client);
618 13b2bc37 2022-10-23 stsp if ((events & EV_READ) == 0)
621 13b2bc37 2022-10-23 stsp memset(&imsg, 0, sizeof(imsg));
623 13b2bc37 2022-10-23 stsp while (err == NULL) {
624 13b2bc37 2022-10-23 stsp err = gotd_imsg_recv(&imsg, ibuf, 0);
626 13b2bc37 2022-10-23 stsp if (err->code == GOT_ERR_PRIVSEP_READ)
627 13b2bc37 2022-10-23 stsp err = NULL;
631 13b2bc37 2022-10-23 stsp evtimer_del(&client->tmo);
633 13b2bc37 2022-10-23 stsp switch (imsg.hdr.type) {
634 f1752522 2022-10-29 stsp case GOTD_IMSG_INFO:
635 f1752522 2022-10-29 stsp err = send_info(client);
637 f1752522 2022-10-29 stsp case GOTD_IMSG_STOP:
638 f1752522 2022-10-29 stsp err = stop_gotd(client);
640 13b2bc37 2022-10-23 stsp case GOTD_IMSG_LIST_REFS:
641 ae7c1b78 2023-01-10 stsp err = start_client_authentication(client, &imsg);
644 ae7c1b78 2023-01-10 stsp log_debug("unexpected imsg %d", imsg.hdr.type);
645 13b2bc37 2022-10-23 stsp err = got_error(GOT_ERR_PRIVSEP_MSG);
649 13b2bc37 2022-10-23 stsp imsg_free(&imsg);
653 b5225f29 2023-01-22 op disconnect_on_error(client, err);
655 13b2bc37 2022-10-23 stsp gotd_imsg_event_add(&client->iev);
659 13b2bc37 2022-10-23 stsp static void
660 ae7c1b78 2023-01-10 stsp gotd_auth_timeout(int fd, short events, void *arg)
662 13b2bc37 2022-10-23 stsp struct gotd_client *client = arg;
664 ae7c1b78 2023-01-10 stsp log_debug("disconnecting uid %d due to authentication timeout",
665 ae7c1b78 2023-01-10 stsp client->euid);
666 13b2bc37 2022-10-23 stsp disconnect(client);
669 d93ecf7d 2022-12-14 stsp static const struct got_error *
670 d93ecf7d 2022-12-14 stsp recv_connect(uint32_t *client_id, struct imsg *imsg)
672 d93ecf7d 2022-12-14 stsp const struct got_error *err = NULL;
673 d93ecf7d 2022-12-14 stsp struct gotd_imsg_connect iconnect;
674 d93ecf7d 2022-12-14 stsp size_t datalen;
675 13b2bc37 2022-10-23 stsp int s = -1;
676 13b2bc37 2022-10-23 stsp struct gotd_client *client = NULL;
678 d93ecf7d 2022-12-14 stsp *client_id = 0;
680 d93ecf7d 2022-12-14 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
681 d93ecf7d 2022-12-14 stsp if (datalen != sizeof(iconnect))
682 d93ecf7d 2022-12-14 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
683 d93ecf7d 2022-12-14 stsp memcpy(&iconnect, imsg->data, sizeof(iconnect));
685 d93ecf7d 2022-12-14 stsp s = imsg->fd;
686 13b2bc37 2022-10-23 stsp if (s == -1) {
687 d93ecf7d 2022-12-14 stsp err = got_error(GOT_ERR_PRIVSEP_NO_FD);
691 d93ecf7d 2022-12-14 stsp if (find_client(iconnect.client_id)) {
692 d93ecf7d 2022-12-14 stsp err = got_error_msg(GOT_ERR_CLIENT_ID, "duplicate client ID");
696 13b2bc37 2022-10-23 stsp client = calloc(1, sizeof(*client));
697 13b2bc37 2022-10-23 stsp if (client == NULL) {
698 d93ecf7d 2022-12-14 stsp err = got_error_from_errno("calloc");
702 d93ecf7d 2022-12-14 stsp *client_id = iconnect.client_id;
704 eac23c30 2023-01-10 stsp client->state = GOTD_CLIENT_STATE_NEW;
705 d93ecf7d 2022-12-14 stsp client->id = iconnect.client_id;
706 13b2bc37 2022-10-23 stsp client->fd = s;
708 365cf0f3 2022-12-29 stsp /* The auth process will verify UID/GID for us. */
709 365cf0f3 2022-12-29 stsp client->euid = iconnect.euid;
710 365cf0f3 2022-12-29 stsp client->egid = iconnect.egid;
712 13b2bc37 2022-10-23 stsp imsg_init(&client->iev.ibuf, client->fd);
713 13b2bc37 2022-10-23 stsp client->iev.handler = gotd_request;
714 13b2bc37 2022-10-23 stsp client->iev.events = EV_READ;
715 13b2bc37 2022-10-23 stsp client->iev.handler_arg = client;
717 13b2bc37 2022-10-23 stsp event_set(&client->iev.ev, client->fd, EV_READ, gotd_request,
718 13b2bc37 2022-10-23 stsp &client->iev);
719 13b2bc37 2022-10-23 stsp gotd_imsg_event_add(&client->iev);
721 ae7c1b78 2023-01-10 stsp evtimer_set(&client->tmo, gotd_auth_timeout, client);
723 13b2bc37 2022-10-23 stsp add_client(client);
724 13b2bc37 2022-10-23 stsp log_debug("%s: new client uid %d connected on fd %d", __func__,
725 13b2bc37 2022-10-23 stsp client->euid, client->fd);
728 b50a2b46 2022-12-29 stsp struct gotd_child_proc *listen_proc = &gotd.listen_proc;
729 d93ecf7d 2022-12-14 stsp struct gotd_imsg_disconnect idisconnect;
731 d93ecf7d 2022-12-14 stsp idisconnect.client_id = client->id;
732 d93ecf7d 2022-12-14 stsp if (gotd_imsg_compose_event(&listen_proc->iev,
733 d93ecf7d 2022-12-14 stsp GOTD_IMSG_DISCONNECT, PROC_GOTD, -1,
734 d93ecf7d 2022-12-14 stsp &idisconnect, sizeof(idisconnect)) == -1)
735 d93ecf7d 2022-12-14 stsp log_warn("imsg compose DISCONNECT");
737 d93ecf7d 2022-12-14 stsp if (s != -1)
741 d93ecf7d 2022-12-14 stsp return err;
744 13b2bc37 2022-10-23 stsp static const char *gotd_proc_names[PROC_MAX] = {
749 13b2bc37 2022-10-23 stsp "repo_read",
750 13b2bc37 2022-10-23 stsp "repo_write"
753 13b2bc37 2022-10-23 stsp static void
754 13b2bc37 2022-10-23 stsp kill_proc(struct gotd_child_proc *proc, int fatal)
756 13b2bc37 2022-10-23 stsp if (fatal) {
757 13b2bc37 2022-10-23 stsp log_warnx("sending SIGKILL to PID %d", proc->pid);
758 13b2bc37 2022-10-23 stsp kill(proc->pid, SIGKILL);
760 13b2bc37 2022-10-23 stsp kill(proc->pid, SIGTERM);
763 13b2bc37 2022-10-23 stsp static void
764 13b2bc37 2022-10-23 stsp gotd_shutdown(void)
766 13b2bc37 2022-10-23 stsp struct gotd_child_proc *proc;
767 b50a2b46 2022-12-29 stsp uint64_t slot;
769 ae7c1b78 2023-01-10 stsp log_debug("shutting down");
770 b50a2b46 2022-12-29 stsp for (slot = 0; slot < nitems(gotd_clients); slot++) {
771 b50a2b46 2022-12-29 stsp struct gotd_client *c, *tmp;
773 b50a2b46 2022-12-29 stsp STAILQ_FOREACH_SAFE(c, &gotd_clients[slot], entry, tmp)
774 b50a2b46 2022-12-29 stsp disconnect(c);
777 b50a2b46 2022-12-29 stsp proc = &gotd.listen_proc;
778 b50a2b46 2022-12-29 stsp msgbuf_clear(&proc->iev.ibuf.w);
779 b50a2b46 2022-12-29 stsp close(proc->iev.ibuf.fd);
780 b50a2b46 2022-12-29 stsp kill_proc(proc, 0);
781 5e25db14 2022-12-29 stsp wait_for_child(proc->pid);
783 13b2bc37 2022-10-23 stsp log_info("terminating");
788 13b2bc37 2022-10-23 stsp gotd_sighdlr(int sig, short event, void *arg)
791 13b2bc37 2022-10-23 stsp * Normal signal handler rules don't apply because libevent
792 13b2bc37 2022-10-23 stsp * decouples for us.
795 13b2bc37 2022-10-23 stsp switch (sig) {
796 13b2bc37 2022-10-23 stsp case SIGHUP:
797 13b2bc37 2022-10-23 stsp log_info("%s: ignoring SIGHUP", __func__);
799 13b2bc37 2022-10-23 stsp case SIGUSR1:
800 13b2bc37 2022-10-23 stsp log_info("%s: ignoring SIGUSR1", __func__);
802 13b2bc37 2022-10-23 stsp case SIGTERM:
803 13b2bc37 2022-10-23 stsp case SIGINT:
804 13b2bc37 2022-10-23 stsp gotd_shutdown();
807 13b2bc37 2022-10-23 stsp fatalx("unexpected signal");
811 13b2bc37 2022-10-23 stsp static const struct got_error *
812 13b2bc37 2022-10-23 stsp ensure_proc_is_reading(struct gotd_client *client,
813 13b2bc37 2022-10-23 stsp struct gotd_child_proc *proc)
815 13b2bc37 2022-10-23 stsp if (!client_is_reading(client)) {
816 13b2bc37 2022-10-23 stsp kill_proc(proc, 1);
817 13b2bc37 2022-10-23 stsp return got_error_fmt(GOT_ERR_BAD_PACKET,
818 13b2bc37 2022-10-23 stsp "PID %d handled a read-request for uid %d but this "
819 13b2bc37 2022-10-23 stsp "user is not reading from a repository", proc->pid,
820 13b2bc37 2022-10-23 stsp client->euid);
823 13b2bc37 2022-10-23 stsp return NULL;
826 13b2bc37 2022-10-23 stsp static const struct got_error *
827 13b2bc37 2022-10-23 stsp ensure_proc_is_writing(struct gotd_client *client,
828 13b2bc37 2022-10-23 stsp struct gotd_child_proc *proc)
830 13b2bc37 2022-10-23 stsp if (!client_is_writing(client)) {
831 13b2bc37 2022-10-23 stsp kill_proc(proc, 1);
832 13b2bc37 2022-10-23 stsp return got_error_fmt(GOT_ERR_BAD_PACKET,
833 13b2bc37 2022-10-23 stsp "PID %d handled a write-request for uid %d but this "
834 13b2bc37 2022-10-23 stsp "user is not writing to a repository", proc->pid,
835 13b2bc37 2022-10-23 stsp client->euid);
838 13b2bc37 2022-10-23 stsp return NULL;
842 13b2bc37 2022-10-23 stsp verify_imsg_src(struct gotd_client *client, struct gotd_child_proc *proc,
843 13b2bc37 2022-10-23 stsp struct imsg *imsg)
845 13b2bc37 2022-10-23 stsp const struct got_error *err;
846 13b2bc37 2022-10-23 stsp int ret = 0;
848 d93ecf7d 2022-12-14 stsp if (proc->type == PROC_REPO_READ || proc->type == PROC_REPO_WRITE) {
849 f7a854cf 2023-01-10 stsp if (client->repo == NULL)
850 d93ecf7d 2022-12-14 stsp fatalx("no process found for uid %d", client->euid);
851 f7a854cf 2023-01-10 stsp if (proc->pid != client->repo->pid) {
852 d93ecf7d 2022-12-14 stsp kill_proc(proc, 1);
853 d93ecf7d 2022-12-14 stsp log_warnx("received message from PID %d for uid %d, "
854 d93ecf7d 2022-12-14 stsp "while PID %d is the process serving this user",
855 f7a854cf 2023-01-10 stsp proc->pid, client->euid, client->repo->pid);
859 ae7c1b78 2023-01-10 stsp if (proc->type == PROC_SESSION) {
860 ae7c1b78 2023-01-10 stsp if (client->session == NULL) {
861 ae7c1b78 2023-01-10 stsp log_warnx("no session found for uid %d", client->euid);
864 ae7c1b78 2023-01-10 stsp if (proc->pid != client->session->pid) {
865 ae7c1b78 2023-01-10 stsp kill_proc(proc, 1);
866 ae7c1b78 2023-01-10 stsp log_warnx("received message from PID %d for uid %d, "
867 ae7c1b78 2023-01-10 stsp "while PID %d is the process serving this user",
868 ae7c1b78 2023-01-10 stsp proc->pid, client->euid, client->session->pid);
873 13b2bc37 2022-10-23 stsp switch (imsg->hdr.type) {
874 13b2bc37 2022-10-23 stsp case GOTD_IMSG_ERROR:
877 d93ecf7d 2022-12-14 stsp case GOTD_IMSG_CONNECT:
878 d93ecf7d 2022-12-14 stsp if (proc->type != PROC_LISTEN) {
879 d93ecf7d 2022-12-14 stsp err = got_error_fmt(GOT_ERR_BAD_PACKET,
880 d93ecf7d 2022-12-14 stsp "new connection for uid %d from PID %d "
881 d93ecf7d 2022-12-14 stsp "which is not the listen process",
882 5e25db14 2022-12-29 stsp proc->pid, client->euid);
886 5e25db14 2022-12-29 stsp case GOTD_IMSG_ACCESS_GRANTED:
887 5e25db14 2022-12-29 stsp if (proc->type != PROC_AUTH) {
888 5e25db14 2022-12-29 stsp err = got_error_fmt(GOT_ERR_BAD_PACKET,
889 5e25db14 2022-12-29 stsp "authentication of uid %d from PID %d "
890 5e25db14 2022-12-29 stsp "which is not the auth process",
891 d93ecf7d 2022-12-14 stsp proc->pid, client->euid);
895 ae7c1b78 2023-01-10 stsp case GOTD_IMSG_CLIENT_SESSION_READY:
896 ae7c1b78 2023-01-10 stsp if (proc->type != PROC_SESSION) {
897 ae7c1b78 2023-01-10 stsp err = got_error_fmt(GOT_ERR_BAD_PACKET,
898 ae7c1b78 2023-01-10 stsp "unexpected \"ready\" signal from PID %d",
899 ae7c1b78 2023-01-10 stsp proc->pid);
903 b50a2b46 2022-12-29 stsp case GOTD_IMSG_REPO_CHILD_READY:
904 b50a2b46 2022-12-29 stsp if (proc->type != PROC_REPO_READ &&
905 b50a2b46 2022-12-29 stsp proc->type != PROC_REPO_WRITE) {
906 b50a2b46 2022-12-29 stsp err = got_error_fmt(GOT_ERR_BAD_PACKET,
907 b50a2b46 2022-12-29 stsp "unexpected \"ready\" signal from PID %d",
908 b50a2b46 2022-12-29 stsp proc->pid);
912 13b2bc37 2022-10-23 stsp case GOTD_IMSG_PACKFILE_DONE:
913 13b2bc37 2022-10-23 stsp err = ensure_proc_is_reading(client, proc);
915 13b2bc37 2022-10-23 stsp log_warnx("uid %d: %s", client->euid, err->msg);
919 13b2bc37 2022-10-23 stsp case GOTD_IMSG_PACKFILE_INSTALL:
920 13b2bc37 2022-10-23 stsp case GOTD_IMSG_REF_UPDATES_START:
921 13b2bc37 2022-10-23 stsp case GOTD_IMSG_REF_UPDATE:
922 13b2bc37 2022-10-23 stsp err = ensure_proc_is_writing(client, proc);
924 13b2bc37 2022-10-23 stsp log_warnx("uid %d: %s", client->euid, err->msg);
929 13b2bc37 2022-10-23 stsp log_debug("%s: unexpected imsg %d", __func__, imsg->hdr.type);
933 13b2bc37 2022-10-23 stsp return ret;
936 13b2bc37 2022-10-23 stsp static const struct got_error *
937 ae7c1b78 2023-01-10 stsp connect_repo_child(struct gotd_client *client,
938 ae7c1b78 2023-01-10 stsp struct gotd_child_proc *repo_proc)
940 b50a2b46 2022-12-29 stsp static const struct got_error *err;
941 ae7c1b78 2023-01-10 stsp struct gotd_imsgev *session_iev = &client->session->iev;
942 ae7c1b78 2023-01-10 stsp struct gotd_imsg_connect_repo_child ireq;
943 ae7c1b78 2023-01-10 stsp int pipe[2];
945 eac23c30 2023-01-10 stsp if (client->state != GOTD_CLIENT_STATE_ACCESS_GRANTED)
946 ae7c1b78 2023-01-10 stsp return got_error_msg(GOT_ERR_BAD_REQUEST,
947 ae7c1b78 2023-01-10 stsp "unexpected repo child ready signal received");
949 ae7c1b78 2023-01-10 stsp if (socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK,
950 ae7c1b78 2023-01-10 stsp PF_UNSPEC, pipe) == -1)
951 ae7c1b78 2023-01-10 stsp fatal("socketpair");
953 ae7c1b78 2023-01-10 stsp memset(&ireq, 0, sizeof(ireq));
954 ae7c1b78 2023-01-10 stsp ireq.client_id = client->id;
955 ae7c1b78 2023-01-10 stsp ireq.proc_id = repo_proc->type;
957 ae7c1b78 2023-01-10 stsp /* Pass repo child pipe to session child process. */
958 ae7c1b78 2023-01-10 stsp if (gotd_imsg_compose_event(session_iev, GOTD_IMSG_CONNECT_REPO_CHILD,
959 ae7c1b78 2023-01-10 stsp PROC_GOTD, pipe[0], &ireq, sizeof(ireq)) == -1) {
960 ae7c1b78 2023-01-10 stsp err = got_error_from_errno("imsg compose CONNECT_REPO_CHILD");
961 ae7c1b78 2023-01-10 stsp close(pipe[0]);
962 ae7c1b78 2023-01-10 stsp close(pipe[1]);
963 ae7c1b78 2023-01-10 stsp return err;
966 ae7c1b78 2023-01-10 stsp /* Pass session child pipe to repo child process. */
967 ae7c1b78 2023-01-10 stsp if (gotd_imsg_compose_event(&repo_proc->iev,
968 ae7c1b78 2023-01-10 stsp GOTD_IMSG_CONNECT_REPO_CHILD, PROC_GOTD, pipe[1], NULL, 0) == -1) {
969 ae7c1b78 2023-01-10 stsp err = got_error_from_errno("imsg compose CONNECT_REPO_CHILD");
970 ae7c1b78 2023-01-10 stsp close(pipe[1]);
971 ae7c1b78 2023-01-10 stsp return err;
974 13b2bc37 2022-10-23 stsp return NULL;
977 13b2bc37 2022-10-23 stsp static void
978 b50a2b46 2022-12-29 stsp gotd_dispatch_listener(int fd, short event, void *arg)
980 13b2bc37 2022-10-23 stsp struct gotd_imsgev *iev = arg;
981 13b2bc37 2022-10-23 stsp struct imsgbuf *ibuf = &iev->ibuf;
982 b50a2b46 2022-12-29 stsp struct gotd_child_proc *proc = &gotd.listen_proc;
984 b50a2b46 2022-12-29 stsp int shut = 0;
985 b50a2b46 2022-12-29 stsp struct imsg imsg;
987 b50a2b46 2022-12-29 stsp if (proc->iev.ibuf.fd != fd)
988 b50a2b46 2022-12-29 stsp fatalx("%s: unexpected fd %d", __func__, fd);
990 b50a2b46 2022-12-29 stsp if (event & EV_READ) {
991 b50a2b46 2022-12-29 stsp if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
992 b50a2b46 2022-12-29 stsp fatal("imsg_read error");
993 b50a2b46 2022-12-29 stsp if (n == 0) {
994 b50a2b46 2022-12-29 stsp /* Connection closed. */
1000 b50a2b46 2022-12-29 stsp if (event & EV_WRITE) {
1001 b50a2b46 2022-12-29 stsp n = msgbuf_write(&ibuf->w);
1002 b50a2b46 2022-12-29 stsp if (n == -1 && errno != EAGAIN)
1003 b50a2b46 2022-12-29 stsp fatal("msgbuf_write");
1004 b50a2b46 2022-12-29 stsp if (n == 0) {
1005 b50a2b46 2022-12-29 stsp /* Connection closed. */
1007 b50a2b46 2022-12-29 stsp goto done;
1011 b50a2b46 2022-12-29 stsp for (;;) {
1012 b50a2b46 2022-12-29 stsp const struct got_error *err = NULL;
1013 b50a2b46 2022-12-29 stsp struct gotd_client *client = NULL;
1014 b50a2b46 2022-12-29 stsp uint32_t client_id = 0;
1015 b50a2b46 2022-12-29 stsp int do_disconnect = 0;
1017 b50a2b46 2022-12-29 stsp if ((n = imsg_get(ibuf, &imsg)) == -1)
1018 b50a2b46 2022-12-29 stsp fatal("%s: imsg_get error", __func__);
1019 b50a2b46 2022-12-29 stsp if (n == 0) /* No more messages. */
1022 b50a2b46 2022-12-29 stsp switch (imsg.hdr.type) {
1023 b50a2b46 2022-12-29 stsp case GOTD_IMSG_ERROR:
1024 b50a2b46 2022-12-29 stsp do_disconnect = 1;
1025 b50a2b46 2022-12-29 stsp err = gotd_imsg_recv_error(&client_id, &imsg);
1027 b50a2b46 2022-12-29 stsp case GOTD_IMSG_CONNECT:
1028 b50a2b46 2022-12-29 stsp err = recv_connect(&client_id, &imsg);
1031 b50a2b46 2022-12-29 stsp log_debug("unexpected imsg %d", imsg.hdr.type);
1035 b50a2b46 2022-12-29 stsp client = find_client(client_id);
1036 b50a2b46 2022-12-29 stsp if (client == NULL) {
1037 b50a2b46 2022-12-29 stsp log_warnx("%s: client not found", __func__);
1038 b50a2b46 2022-12-29 stsp imsg_free(&imsg);
1043 b50a2b46 2022-12-29 stsp log_warnx("uid %d: %s", client->euid, err->msg);
1045 b50a2b46 2022-12-29 stsp if (do_disconnect) {
1047 b50a2b46 2022-12-29 stsp disconnect_on_error(client, err);
1049 b50a2b46 2022-12-29 stsp disconnect(client);
1052 b50a2b46 2022-12-29 stsp imsg_free(&imsg);
1055 b50a2b46 2022-12-29 stsp if (!shut) {
1056 b50a2b46 2022-12-29 stsp gotd_imsg_event_add(iev);
1058 b50a2b46 2022-12-29 stsp /* This pipe is dead. Remove its event handler */
1059 b50a2b46 2022-12-29 stsp event_del(&iev->ev);
1060 b50a2b46 2022-12-29 stsp event_loopexit(NULL);
1064 b50a2b46 2022-12-29 stsp static void
1065 5e25db14 2022-12-29 stsp gotd_dispatch_auth_child(int fd, short event, void *arg)
1067 5e25db14 2022-12-29 stsp const struct got_error *err = NULL;
1068 5e25db14 2022-12-29 stsp struct gotd_imsgev *iev = arg;
1069 5e25db14 2022-12-29 stsp struct imsgbuf *ibuf = &iev->ibuf;
1070 5e25db14 2022-12-29 stsp struct gotd_client *client;
1071 5e25db14 2022-12-29 stsp struct gotd_repo *repo = NULL;
1072 5e25db14 2022-12-29 stsp ssize_t n;
1073 5e25db14 2022-12-29 stsp int shut = 0;
1074 5e25db14 2022-12-29 stsp struct imsg imsg;
1075 5e25db14 2022-12-29 stsp uint32_t client_id = 0;
1076 5e25db14 2022-12-29 stsp int do_disconnect = 0;
1078 5e25db14 2022-12-29 stsp client = find_client_by_proc_fd(fd);
1079 5e25db14 2022-12-29 stsp if (client == NULL)
1080 5e25db14 2022-12-29 stsp fatalx("cannot find client for fd %d", fd);
1082 5e25db14 2022-12-29 stsp if (client->auth == NULL)
1083 5e25db14 2022-12-29 stsp fatalx("cannot find auth child process for fd %d", fd);
1085 5e25db14 2022-12-29 stsp if (event & EV_READ) {
1086 5e25db14 2022-12-29 stsp if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
1087 5e25db14 2022-12-29 stsp fatal("imsg_read error");
1088 5e25db14 2022-12-29 stsp if (n == 0) {
1089 5e25db14 2022-12-29 stsp /* Connection closed. */
1091 5e25db14 2022-12-29 stsp goto done;
1095 5e25db14 2022-12-29 stsp if (event & EV_WRITE) {
1096 5e25db14 2022-12-29 stsp n = msgbuf_write(&ibuf->w);
1097 5e25db14 2022-12-29 stsp if (n == -1 && errno != EAGAIN)
1098 5e25db14 2022-12-29 stsp fatal("msgbuf_write");
1099 5e25db14 2022-12-29 stsp if (n == 0) {
1100 5e25db14 2022-12-29 stsp /* Connection closed. */
1103 5e25db14 2022-12-29 stsp goto done;
1106 5e25db14 2022-12-29 stsp if (client->auth->iev.ibuf.fd != fd)
1107 5e25db14 2022-12-29 stsp fatalx("%s: unexpected fd %d", __func__, fd);
1109 5e25db14 2022-12-29 stsp if ((n = imsg_get(ibuf, &imsg)) == -1)
1110 5e25db14 2022-12-29 stsp fatal("%s: imsg_get error", __func__);
1111 5e25db14 2022-12-29 stsp if (n == 0) /* No more messages. */
1114 5e25db14 2022-12-29 stsp evtimer_del(&client->tmo);
1116 5e25db14 2022-12-29 stsp switch (imsg.hdr.type) {
1117 5e25db14 2022-12-29 stsp case GOTD_IMSG_ERROR:
1118 5e25db14 2022-12-29 stsp do_disconnect = 1;
1119 5e25db14 2022-12-29 stsp err = gotd_imsg_recv_error(&client_id, &imsg);
1121 5e25db14 2022-12-29 stsp case GOTD_IMSG_ACCESS_GRANTED:
1122 eac23c30 2023-01-10 stsp client->state = GOTD_CLIENT_STATE_ACCESS_GRANTED;
1125 5e25db14 2022-12-29 stsp do_disconnect = 1;
1126 5e25db14 2022-12-29 stsp log_debug("unexpected imsg %d", imsg.hdr.type);
1130 5e25db14 2022-12-29 stsp if (!verify_imsg_src(client, client->auth, &imsg)) {
1131 5e25db14 2022-12-29 stsp do_disconnect = 1;
1132 5e25db14 2022-12-29 stsp log_debug("dropping imsg type %d from PID %d",
1133 5e25db14 2022-12-29 stsp imsg.hdr.type, client->auth->pid);
1135 5e25db14 2022-12-29 stsp imsg_free(&imsg);
1137 5e25db14 2022-12-29 stsp if (do_disconnect) {
1139 5e25db14 2022-12-29 stsp disconnect_on_error(client, err);
1141 5e25db14 2022-12-29 stsp disconnect(client);
1142 5e25db14 2022-12-29 stsp goto done;
1145 5e25db14 2022-12-29 stsp repo = find_repo_by_name(client->auth->repo_name);
1146 5e25db14 2022-12-29 stsp if (repo == NULL) {
1147 5e25db14 2022-12-29 stsp err = got_error(GOT_ERR_NOT_GIT_REPO);
1148 5e25db14 2022-12-29 stsp goto done;
1150 5e25db14 2022-12-29 stsp kill_auth_proc(client);
1152 d30e708b 2023-01-27 op log_info("authenticated uid %d for repository %s",
1153 5e25db14 2022-12-29 stsp client->euid, repo->name);
1155 ae7c1b78 2023-01-10 stsp err = start_session_child(client, repo, gotd.argv0,
1156 7fdc3e58 2022-12-30 mark gotd.confpath, gotd.daemonize, gotd.verbosity);
1158 ae7c1b78 2023-01-10 stsp goto done;
1161 5e25db14 2022-12-29 stsp log_warnx("uid %d: %s", client->euid, err->msg);
1163 5e25db14 2022-12-29 stsp /* We might have killed the auth process by now. */
1164 5e25db14 2022-12-29 stsp if (client->auth != NULL) {
1165 5e25db14 2022-12-29 stsp if (!shut) {
1166 5e25db14 2022-12-29 stsp gotd_imsg_event_add(iev);
1168 5e25db14 2022-12-29 stsp /* This pipe is dead. Remove its event handler */
1169 5e25db14 2022-12-29 stsp event_del(&iev->ev);
1174 ae7c1b78 2023-01-10 stsp static const struct got_error *
1175 ae7c1b78 2023-01-10 stsp connect_session(struct gotd_client *client)
1177 ae7c1b78 2023-01-10 stsp const struct got_error *err = NULL;
1178 ae7c1b78 2023-01-10 stsp struct gotd_imsg_connect iconnect;
1181 ae7c1b78 2023-01-10 stsp memset(&iconnect, 0, sizeof(iconnect));
1183 ae7c1b78 2023-01-10 stsp s = dup(client->fd);
1184 ae7c1b78 2023-01-10 stsp if (s == -1)
1185 ae7c1b78 2023-01-10 stsp return got_error_from_errno("dup");
1187 ae7c1b78 2023-01-10 stsp iconnect.client_id = client->id;
1188 ae7c1b78 2023-01-10 stsp iconnect.euid = client->euid;
1189 ae7c1b78 2023-01-10 stsp iconnect.egid = client->egid;
1191 ae7c1b78 2023-01-10 stsp if (gotd_imsg_compose_event(&client->session->iev, GOTD_IMSG_CONNECT,
1192 ae7c1b78 2023-01-10 stsp PROC_GOTD, s, &iconnect, sizeof(iconnect)) == -1) {
1193 ae7c1b78 2023-01-10 stsp err = got_error_from_errno("imsg compose CONNECT");
1195 ae7c1b78 2023-01-10 stsp return err;
1199 ae7c1b78 2023-01-10 stsp * We are no longer interested in messages from this client.
1200 ae7c1b78 2023-01-10 stsp * Further client requests will be handled by the session process.
1202 ae7c1b78 2023-01-10 stsp msgbuf_clear(&client->iev.ibuf.w);
1203 ae7c1b78 2023-01-10 stsp imsg_clear(&client->iev.ibuf);
1204 ae7c1b78 2023-01-10 stsp event_del(&client->iev.ev);
1205 ae7c1b78 2023-01-10 stsp client->fd = -1; /* will be closed via copy in client->iev.ibuf.fd */
1207 ae7c1b78 2023-01-10 stsp return NULL;
1210 5e25db14 2022-12-29 stsp static void
1211 ae7c1b78 2023-01-10 stsp gotd_dispatch_client_session(int fd, short event, void *arg)
1213 b50a2b46 2022-12-29 stsp struct gotd_imsgev *iev = arg;
1214 b50a2b46 2022-12-29 stsp struct imsgbuf *ibuf = &iev->ibuf;
1215 13b2bc37 2022-10-23 stsp struct gotd_child_proc *proc = NULL;
1216 b50a2b46 2022-12-29 stsp struct gotd_client *client = NULL;
1217 13b2bc37 2022-10-23 stsp ssize_t n;
1218 13b2bc37 2022-10-23 stsp int shut = 0;
1219 13b2bc37 2022-10-23 stsp struct imsg imsg;
1221 ae7c1b78 2023-01-10 stsp client = find_client_by_proc_fd(fd);
1222 ae7c1b78 2023-01-10 stsp if (client == NULL)
1223 ae7c1b78 2023-01-10 stsp fatalx("cannot find client for fd %d", fd);
1225 13b2bc37 2022-10-23 stsp if (event & EV_READ) {
1226 13b2bc37 2022-10-23 stsp if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
1227 13b2bc37 2022-10-23 stsp fatal("imsg_read error");
1228 13b2bc37 2022-10-23 stsp if (n == 0) {
1229 13b2bc37 2022-10-23 stsp /* Connection closed. */
1231 13b2bc37 2022-10-23 stsp goto done;
1235 13b2bc37 2022-10-23 stsp if (event & EV_WRITE) {
1236 13b2bc37 2022-10-23 stsp n = msgbuf_write(&ibuf->w);
1237 13b2bc37 2022-10-23 stsp if (n == -1 && errno != EAGAIN)
1238 13b2bc37 2022-10-23 stsp fatal("msgbuf_write");
1239 13b2bc37 2022-10-23 stsp if (n == 0) {
1240 13b2bc37 2022-10-23 stsp /* Connection closed. */
1242 13b2bc37 2022-10-23 stsp goto done;
1246 ae7c1b78 2023-01-10 stsp proc = client->session;
1247 ae7c1b78 2023-01-10 stsp if (proc == NULL)
1248 ae7c1b78 2023-01-10 stsp fatalx("cannot find session child process for fd %d", fd);
1250 ae7c1b78 2023-01-10 stsp for (;;) {
1251 ae7c1b78 2023-01-10 stsp const struct got_error *err = NULL;
1252 ae7c1b78 2023-01-10 stsp uint32_t client_id = 0;
1253 ae7c1b78 2023-01-10 stsp int do_disconnect = 0, do_start_repo_child = 0;
1255 ae7c1b78 2023-01-10 stsp if ((n = imsg_get(ibuf, &imsg)) == -1)
1256 ae7c1b78 2023-01-10 stsp fatal("%s: imsg_get error", __func__);
1257 ae7c1b78 2023-01-10 stsp if (n == 0) /* No more messages. */
1260 ae7c1b78 2023-01-10 stsp switch (imsg.hdr.type) {
1261 ae7c1b78 2023-01-10 stsp case GOTD_IMSG_ERROR:
1262 ae7c1b78 2023-01-10 stsp do_disconnect = 1;
1263 ae7c1b78 2023-01-10 stsp err = gotd_imsg_recv_error(&client_id, &imsg);
1265 ae7c1b78 2023-01-10 stsp case GOTD_IMSG_CLIENT_SESSION_READY:
1266 eac23c30 2023-01-10 stsp if (client->state != GOTD_CLIENT_STATE_ACCESS_GRANTED) {
1267 ae7c1b78 2023-01-10 stsp err = got_error(GOT_ERR_PRIVSEP_MSG);
1270 ae7c1b78 2023-01-10 stsp do_start_repo_child = 1;
1272 ae7c1b78 2023-01-10 stsp case GOTD_IMSG_DISCONNECT:
1273 ae7c1b78 2023-01-10 stsp do_disconnect = 1;
1276 ae7c1b78 2023-01-10 stsp log_debug("unexpected imsg %d", imsg.hdr.type);
1280 ae7c1b78 2023-01-10 stsp if (!verify_imsg_src(client, proc, &imsg)) {
1281 ae7c1b78 2023-01-10 stsp log_debug("dropping imsg type %d from PID %d",
1282 ae7c1b78 2023-01-10 stsp imsg.hdr.type, proc->pid);
1283 ae7c1b78 2023-01-10 stsp imsg_free(&imsg);
1287 ae7c1b78 2023-01-10 stsp log_warnx("uid %d: %s", client->euid, err->msg);
1289 ae7c1b78 2023-01-10 stsp if (do_start_repo_child) {
1290 ae7c1b78 2023-01-10 stsp struct gotd_repo *repo;
1292 ae7c1b78 2023-01-10 stsp repo = find_repo_by_name(client->session->repo_name);
1293 ae7c1b78 2023-01-10 stsp if (repo != NULL) {
1294 ae7c1b78 2023-01-10 stsp enum gotd_procid proc_type;
1296 ae7c1b78 2023-01-10 stsp if (client->required_auth & GOTD_AUTH_WRITE)
1297 ae7c1b78 2023-01-10 stsp proc_type = PROC_REPO_WRITE;
1299 ae7c1b78 2023-01-10 stsp proc_type = PROC_REPO_READ;
1301 ae7c1b78 2023-01-10 stsp err = start_repo_child(client, proc_type, repo,
1302 ae7c1b78 2023-01-10 stsp gotd.argv0, gotd.confpath, gotd.daemonize,
1303 ae7c1b78 2023-01-10 stsp gotd.verbosity);
1305 ae7c1b78 2023-01-10 stsp err = got_error(GOT_ERR_NOT_GIT_REPO);
1307 ae7c1b78 2023-01-10 stsp if (err) {
1308 ae7c1b78 2023-01-10 stsp log_warnx("uid %d: %s", client->euid, err->msg);
1309 ae7c1b78 2023-01-10 stsp do_disconnect = 1;
1313 ae7c1b78 2023-01-10 stsp if (do_disconnect) {
1315 ae7c1b78 2023-01-10 stsp disconnect_on_error(client, err);
1317 ae7c1b78 2023-01-10 stsp disconnect(client);
1320 ae7c1b78 2023-01-10 stsp imsg_free(&imsg);
1323 ae7c1b78 2023-01-10 stsp if (!shut) {
1324 ae7c1b78 2023-01-10 stsp gotd_imsg_event_add(iev);
1326 ae7c1b78 2023-01-10 stsp /* This pipe is dead. Remove its event handler */
1327 ae7c1b78 2023-01-10 stsp event_del(&iev->ev);
1328 ae7c1b78 2023-01-10 stsp disconnect(client);
1332 ae7c1b78 2023-01-10 stsp static void
1333 ae7c1b78 2023-01-10 stsp gotd_dispatch_repo_child(int fd, short event, void *arg)
1335 ae7c1b78 2023-01-10 stsp struct gotd_imsgev *iev = arg;
1336 ae7c1b78 2023-01-10 stsp struct imsgbuf *ibuf = &iev->ibuf;
1337 ae7c1b78 2023-01-10 stsp struct gotd_child_proc *proc = NULL;
1338 ae7c1b78 2023-01-10 stsp struct gotd_client *client;
1339 ae7c1b78 2023-01-10 stsp ssize_t n;
1340 ae7c1b78 2023-01-10 stsp int shut = 0;
1341 ae7c1b78 2023-01-10 stsp struct imsg imsg;
1343 b50a2b46 2022-12-29 stsp client = find_client_by_proc_fd(fd);
1344 b50a2b46 2022-12-29 stsp if (client == NULL)
1345 b50a2b46 2022-12-29 stsp fatalx("cannot find client for fd %d", fd);
1347 ae7c1b78 2023-01-10 stsp if (event & EV_READ) {
1348 ae7c1b78 2023-01-10 stsp if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
1349 ae7c1b78 2023-01-10 stsp fatal("imsg_read error");
1350 ae7c1b78 2023-01-10 stsp if (n == 0) {
1351 ae7c1b78 2023-01-10 stsp /* Connection closed. */
1353 ae7c1b78 2023-01-10 stsp goto done;
1357 ae7c1b78 2023-01-10 stsp if (event & EV_WRITE) {
1358 ae7c1b78 2023-01-10 stsp n = msgbuf_write(&ibuf->w);
1359 ae7c1b78 2023-01-10 stsp if (n == -1 && errno != EAGAIN)
1360 ae7c1b78 2023-01-10 stsp fatal("msgbuf_write");
1361 ae7c1b78 2023-01-10 stsp if (n == 0) {
1362 ae7c1b78 2023-01-10 stsp /* Connection closed. */
1364 ae7c1b78 2023-01-10 stsp goto done;
1368 f7a854cf 2023-01-10 stsp proc = client->repo;
1369 13b2bc37 2022-10-23 stsp if (proc == NULL)
1370 13b2bc37 2022-10-23 stsp fatalx("cannot find child process for fd %d", fd);
1372 13b2bc37 2022-10-23 stsp for (;;) {
1373 13b2bc37 2022-10-23 stsp const struct got_error *err = NULL;
1374 13b2bc37 2022-10-23 stsp uint32_t client_id = 0;
1375 13b2bc37 2022-10-23 stsp int do_disconnect = 0;
1377 13b2bc37 2022-10-23 stsp if ((n = imsg_get(ibuf, &imsg)) == -1)
1378 13b2bc37 2022-10-23 stsp fatal("%s: imsg_get error", __func__);
1379 13b2bc37 2022-10-23 stsp if (n == 0) /* No more messages. */
1382 13b2bc37 2022-10-23 stsp switch (imsg.hdr.type) {
1383 13b2bc37 2022-10-23 stsp case GOTD_IMSG_ERROR:
1384 13b2bc37 2022-10-23 stsp do_disconnect = 1;
1385 13b2bc37 2022-10-23 stsp err = gotd_imsg_recv_error(&client_id, &imsg);
1387 b50a2b46 2022-12-29 stsp case GOTD_IMSG_REPO_CHILD_READY:
1388 ae7c1b78 2023-01-10 stsp err = connect_session(client);
1391 ae7c1b78 2023-01-10 stsp err = connect_repo_child(client, proc);
1394 13b2bc37 2022-10-23 stsp log_debug("unexpected imsg %d", imsg.hdr.type);
1398 13b2bc37 2022-10-23 stsp if (!verify_imsg_src(client, proc, &imsg)) {
1399 13b2bc37 2022-10-23 stsp log_debug("dropping imsg type %d from PID %d",
1400 13b2bc37 2022-10-23 stsp imsg.hdr.type, proc->pid);
1401 13b2bc37 2022-10-23 stsp imsg_free(&imsg);
1405 13b2bc37 2022-10-23 stsp log_warnx("uid %d: %s", client->euid, err->msg);
1407 13b2bc37 2022-10-23 stsp if (do_disconnect) {
1409 13b2bc37 2022-10-23 stsp disconnect_on_error(client, err);
1411 13b2bc37 2022-10-23 stsp disconnect(client);
1414 13b2bc37 2022-10-23 stsp imsg_free(&imsg);
1417 13b2bc37 2022-10-23 stsp if (!shut) {
1418 13b2bc37 2022-10-23 stsp gotd_imsg_event_add(iev);
1420 13b2bc37 2022-10-23 stsp /* This pipe is dead. Remove its event handler */
1421 13b2bc37 2022-10-23 stsp event_del(&iev->ev);
1422 ae7c1b78 2023-01-10 stsp disconnect(client);
1426 13b2bc37 2022-10-23 stsp static pid_t
1427 eec68231 2022-12-14 stsp start_child(enum gotd_procid proc_id, const char *repo_path,
1428 585362fd 2022-10-31 op char *argv0, const char *confpath, int fd, int daemonize, int verbosity)
1430 585362fd 2022-10-31 op char *argv[11];
1431 13b2bc37 2022-10-23 stsp int argc = 0;
1432 13b2bc37 2022-10-23 stsp pid_t pid;
1434 13b2bc37 2022-10-23 stsp switch (pid = fork()) {
1436 13b2bc37 2022-10-23 stsp fatal("cannot fork");
1440 13b2bc37 2022-10-23 stsp close(fd);
1441 13b2bc37 2022-10-23 stsp return pid;
1444 8c6fc146 2022-11-17 stsp if (fd != GOTD_FILENO_MSG_PIPE) {
1445 8c6fc146 2022-11-17 stsp if (dup2(fd, GOTD_FILENO_MSG_PIPE) == -1)
1446 13b2bc37 2022-10-23 stsp fatal("cannot setup imsg fd");
1447 13b2bc37 2022-10-23 stsp } else if (fcntl(fd, F_SETFD, 0) == -1)
1448 13b2bc37 2022-10-23 stsp fatal("cannot setup imsg fd");
1450 13b2bc37 2022-10-23 stsp argv[argc++] = argv0;
1451 13b2bc37 2022-10-23 stsp switch (proc_id) {
1452 d93ecf7d 2022-12-14 stsp case PROC_LISTEN:
1453 d93ecf7d 2022-12-14 stsp argv[argc++] = (char *)"-L";
1455 5e25db14 2022-12-29 stsp case PROC_AUTH:
1456 5e25db14 2022-12-29 stsp argv[argc++] = (char *)"-A";
1458 ae7c1b78 2023-01-10 stsp case PROC_SESSION:
1459 ae7c1b78 2023-01-10 stsp argv[argc++] = (char *)"-S";
1461 13b2bc37 2022-10-23 stsp case PROC_REPO_READ:
1462 13b2bc37 2022-10-23 stsp argv[argc++] = (char *)"-R";
1464 13b2bc37 2022-10-23 stsp case PROC_REPO_WRITE:
1465 13b2bc37 2022-10-23 stsp argv[argc++] = (char *)"-W";
1468 13b2bc37 2022-10-23 stsp fatalx("invalid process id %d", proc_id);
1471 585362fd 2022-10-31 op argv[argc++] = (char *)"-f";
1472 585362fd 2022-10-31 op argv[argc++] = (char *)confpath;
1474 eec68231 2022-12-14 stsp if (repo_path) {
1475 d93ecf7d 2022-12-14 stsp argv[argc++] = (char *)"-P";
1476 eec68231 2022-12-14 stsp argv[argc++] = (char *)repo_path;
1479 13b2bc37 2022-10-23 stsp if (!daemonize)
1480 13b2bc37 2022-10-23 stsp argv[argc++] = (char *)"-d";
1481 13b2bc37 2022-10-23 stsp if (verbosity > 0)
1482 13b2bc37 2022-10-23 stsp argv[argc++] = (char *)"-v";
1483 13b2bc37 2022-10-23 stsp if (verbosity > 1)
1484 13b2bc37 2022-10-23 stsp argv[argc++] = (char *)"-v";
1485 13b2bc37 2022-10-23 stsp argv[argc++] = NULL;
1487 13b2bc37 2022-10-23 stsp execvp(argv0, argv);
1488 13b2bc37 2022-10-23 stsp fatal("execvp");
1491 13b2bc37 2022-10-23 stsp static void
1492 d93ecf7d 2022-12-14 stsp start_listener(char *argv0, const char *confpath, int daemonize, int verbosity)
1494 b50a2b46 2022-12-29 stsp struct gotd_child_proc *proc = &gotd.listen_proc;
1496 d93ecf7d 2022-12-14 stsp proc->type = PROC_LISTEN;
1498 d93ecf7d 2022-12-14 stsp if (socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK,
1499 d93ecf7d 2022-12-14 stsp PF_UNSPEC, proc->pipe) == -1)
1500 d93ecf7d 2022-12-14 stsp fatal("socketpair");
1502 d93ecf7d 2022-12-14 stsp proc->pid = start_child(proc->type, NULL, argv0, confpath,
1503 d93ecf7d 2022-12-14 stsp proc->pipe[1], daemonize, verbosity);
1504 d93ecf7d 2022-12-14 stsp imsg_init(&proc->iev.ibuf, proc->pipe[0]);
1505 b50a2b46 2022-12-29 stsp proc->iev.handler = gotd_dispatch_listener;
1506 d93ecf7d 2022-12-14 stsp proc->iev.events = EV_READ;
1507 d93ecf7d 2022-12-14 stsp proc->iev.handler_arg = NULL;
1510 b50a2b46 2022-12-29 stsp static const struct got_error *
1511 ae7c1b78 2023-01-10 stsp start_session_child(struct gotd_client *client, struct gotd_repo *repo,
1512 ae7c1b78 2023-01-10 stsp char *argv0, const char *confpath, int daemonize, int verbosity)
1514 ae7c1b78 2023-01-10 stsp struct gotd_child_proc *proc;
1516 ae7c1b78 2023-01-10 stsp proc = calloc(1, sizeof(*proc));
1517 ae7c1b78 2023-01-10 stsp if (proc == NULL)
1518 ae7c1b78 2023-01-10 stsp return got_error_from_errno("calloc");
1520 ae7c1b78 2023-01-10 stsp proc->type = PROC_SESSION;
1521 ae7c1b78 2023-01-10 stsp if (strlcpy(proc->repo_name, repo->name,
1522 ae7c1b78 2023-01-10 stsp sizeof(proc->repo_name)) >= sizeof(proc->repo_name))
1523 ae7c1b78 2023-01-10 stsp fatalx("repository name too long: %s", repo->name);
1524 ae7c1b78 2023-01-10 stsp log_debug("starting client uid %d session for repository %s",
1525 ae7c1b78 2023-01-10 stsp client->euid, repo->name);
1526 ae7c1b78 2023-01-10 stsp if (strlcpy(proc->repo_path, repo->path, sizeof(proc->repo_path)) >=
1527 ae7c1b78 2023-01-10 stsp sizeof(proc->repo_path))
1528 ae7c1b78 2023-01-10 stsp fatalx("repository path too long: %s", repo->path);
1529 ae7c1b78 2023-01-10 stsp if (socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK,
1530 ae7c1b78 2023-01-10 stsp PF_UNSPEC, proc->pipe) == -1)
1531 ae7c1b78 2023-01-10 stsp fatal("socketpair");
1532 ae7c1b78 2023-01-10 stsp proc->pid = start_child(proc->type, proc->repo_path, argv0,
1533 ae7c1b78 2023-01-10 stsp confpath, proc->pipe[1], daemonize, verbosity);
1534 ae7c1b78 2023-01-10 stsp imsg_init(&proc->iev.ibuf, proc->pipe[0]);
1535 ae7c1b78 2023-01-10 stsp log_debug("proc %s %s is on fd %d",
1536 ae7c1b78 2023-01-10 stsp gotd_proc_names[proc->type], proc->repo_path,
1537 ae7c1b78 2023-01-10 stsp proc->pipe[0]);
1538 ae7c1b78 2023-01-10 stsp proc->iev.handler = gotd_dispatch_client_session;
1539 ae7c1b78 2023-01-10 stsp proc->iev.events = EV_READ;
1540 ae7c1b78 2023-01-10 stsp proc->iev.handler_arg = NULL;
1541 ae7c1b78 2023-01-10 stsp event_set(&proc->iev.ev, proc->iev.ibuf.fd, EV_READ,
1542 ae7c1b78 2023-01-10 stsp gotd_dispatch_client_session, &proc->iev);
1543 ae7c1b78 2023-01-10 stsp gotd_imsg_event_add(&proc->iev);
1545 ae7c1b78 2023-01-10 stsp client->session = proc;
1546 ae7c1b78 2023-01-10 stsp return NULL;
1549 ae7c1b78 2023-01-10 stsp static const struct got_error *
1550 b50a2b46 2022-12-29 stsp start_repo_child(struct gotd_client *client, enum gotd_procid proc_type,
1551 b50a2b46 2022-12-29 stsp struct gotd_repo *repo, char *argv0, const char *confpath,
1552 585362fd 2022-10-31 op int daemonize, int verbosity)
1554 13b2bc37 2022-10-23 stsp struct gotd_child_proc *proc;
1556 b50a2b46 2022-12-29 stsp if (proc_type != PROC_REPO_READ && proc_type != PROC_REPO_WRITE)
1557 b50a2b46 2022-12-29 stsp return got_error_msg(GOT_ERR_NOT_IMPL, "bad process type");
1559 b50a2b46 2022-12-29 stsp proc = calloc(1, sizeof(*proc));
1560 b50a2b46 2022-12-29 stsp if (proc == NULL)
1561 b50a2b46 2022-12-29 stsp return got_error_from_errno("calloc");
1563 b50a2b46 2022-12-29 stsp proc->type = proc_type;
1564 b50a2b46 2022-12-29 stsp if (strlcpy(proc->repo_name, repo->name,
1565 b50a2b46 2022-12-29 stsp sizeof(proc->repo_name)) >= sizeof(proc->repo_name))
1566 b50a2b46 2022-12-29 stsp fatalx("repository name too long: %s", repo->name);
1567 b50a2b46 2022-12-29 stsp log_debug("starting %s for repository %s",
1568 b50a2b46 2022-12-29 stsp proc->type == PROC_REPO_READ ? "reader" : "writer", repo->name);
1569 9b7f22a6 2023-01-08 stsp if (strlcpy(proc->repo_path, repo->path, sizeof(proc->repo_path)) >=
1570 9b7f22a6 2023-01-08 stsp sizeof(proc->repo_path))
1571 9b7f22a6 2023-01-08 stsp fatalx("repository path too long: %s", repo->path);
1572 b50a2b46 2022-12-29 stsp if (socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK,
1573 b50a2b46 2022-12-29 stsp PF_UNSPEC, proc->pipe) == -1)
1574 b50a2b46 2022-12-29 stsp fatal("socketpair");
1575 b50a2b46 2022-12-29 stsp proc->pid = start_child(proc->type, proc->repo_path, argv0,
1576 b50a2b46 2022-12-29 stsp confpath, proc->pipe[1], daemonize, verbosity);
1577 b50a2b46 2022-12-29 stsp imsg_init(&proc->iev.ibuf, proc->pipe[0]);
1578 b50a2b46 2022-12-29 stsp log_debug("proc %s %s is on fd %d",
1579 b50a2b46 2022-12-29 stsp gotd_proc_names[proc->type], proc->repo_path,
1580 b50a2b46 2022-12-29 stsp proc->pipe[0]);
1581 b50a2b46 2022-12-29 stsp proc->iev.handler = gotd_dispatch_repo_child;
1582 b50a2b46 2022-12-29 stsp proc->iev.events = EV_READ;
1583 b50a2b46 2022-12-29 stsp proc->iev.handler_arg = NULL;
1584 b50a2b46 2022-12-29 stsp event_set(&proc->iev.ev, proc->iev.ibuf.fd, EV_READ,
1585 b50a2b46 2022-12-29 stsp gotd_dispatch_repo_child, &proc->iev);
1586 b50a2b46 2022-12-29 stsp gotd_imsg_event_add(&proc->iev);
1588 f7a854cf 2023-01-10 stsp client->repo = proc;
1589 5e25db14 2022-12-29 stsp return NULL;
1592 5e25db14 2022-12-29 stsp static const struct got_error *
1593 5e25db14 2022-12-29 stsp start_auth_child(struct gotd_client *client, int required_auth,
1594 5e25db14 2022-12-29 stsp struct gotd_repo *repo, char *argv0, const char *confpath,
1595 5e25db14 2022-12-29 stsp int daemonize, int verbosity)
1597 365cf0f3 2022-12-29 stsp const struct got_error *err = NULL;
1598 5e25db14 2022-12-29 stsp struct gotd_child_proc *proc;
1599 5e25db14 2022-12-29 stsp struct gotd_imsg_auth iauth;
1602 5e25db14 2022-12-29 stsp memset(&iauth, 0, sizeof(iauth));
1604 365cf0f3 2022-12-29 stsp fd = dup(client->fd);
1605 365cf0f3 2022-12-29 stsp if (fd == -1)
1606 365cf0f3 2022-12-29 stsp return got_error_from_errno("dup");
1608 5e25db14 2022-12-29 stsp proc = calloc(1, sizeof(*proc));
1609 365cf0f3 2022-12-29 stsp if (proc == NULL) {
1610 365cf0f3 2022-12-29 stsp err = got_error_from_errno("calloc");
1611 365cf0f3 2022-12-29 stsp close(fd);
1612 365cf0f3 2022-12-29 stsp return err;
1615 5e25db14 2022-12-29 stsp proc->type = PROC_AUTH;
1616 5e25db14 2022-12-29 stsp if (strlcpy(proc->repo_name, repo->name,
1617 5e25db14 2022-12-29 stsp sizeof(proc->repo_name)) >= sizeof(proc->repo_name))
1618 5e25db14 2022-12-29 stsp fatalx("repository name too long: %s", repo->name);
1619 5e25db14 2022-12-29 stsp log_debug("starting auth for uid %d repository %s",
1620 5e25db14 2022-12-29 stsp client->euid, repo->name);
1621 9b7f22a6 2023-01-08 stsp if (strlcpy(proc->repo_path, repo->path, sizeof(proc->repo_path)) >=
1622 9b7f22a6 2023-01-08 stsp sizeof(proc->repo_path))
1623 9b7f22a6 2023-01-08 stsp fatalx("repository path too long: %s", repo->path);
1624 5e25db14 2022-12-29 stsp if (socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK,
1625 5e25db14 2022-12-29 stsp PF_UNSPEC, proc->pipe) == -1)
1626 5e25db14 2022-12-29 stsp fatal("socketpair");
1627 5e25db14 2022-12-29 stsp proc->pid = start_child(proc->type, proc->repo_path, argv0,
1628 5e25db14 2022-12-29 stsp confpath, proc->pipe[1], daemonize, verbosity);
1629 5e25db14 2022-12-29 stsp imsg_init(&proc->iev.ibuf, proc->pipe[0]);
1630 5e25db14 2022-12-29 stsp log_debug("proc %s %s is on fd %d",
1631 5e25db14 2022-12-29 stsp gotd_proc_names[proc->type], proc->repo_path,
1632 5e25db14 2022-12-29 stsp proc->pipe[0]);
1633 5e25db14 2022-12-29 stsp proc->iev.handler = gotd_dispatch_auth_child;
1634 5e25db14 2022-12-29 stsp proc->iev.events = EV_READ;
1635 5e25db14 2022-12-29 stsp proc->iev.handler_arg = NULL;
1636 5e25db14 2022-12-29 stsp event_set(&proc->iev.ev, proc->iev.ibuf.fd, EV_READ,
1637 5e25db14 2022-12-29 stsp gotd_dispatch_auth_child, &proc->iev);
1638 5e25db14 2022-12-29 stsp gotd_imsg_event_add(&proc->iev);
1640 5e25db14 2022-12-29 stsp iauth.euid = client->euid;
1641 5e25db14 2022-12-29 stsp iauth.egid = client->egid;
1642 5e25db14 2022-12-29 stsp iauth.required_auth = required_auth;
1643 5e25db14 2022-12-29 stsp iauth.client_id = client->id;
1644 5e25db14 2022-12-29 stsp if (gotd_imsg_compose_event(&proc->iev, GOTD_IMSG_AUTHENTICATE,
1645 365cf0f3 2022-12-29 stsp PROC_GOTD, fd, &iauth, sizeof(iauth)) == -1) {
1646 5e25db14 2022-12-29 stsp log_warn("imsg compose AUTHENTICATE");
1647 365cf0f3 2022-12-29 stsp close(fd);
1648 365cf0f3 2022-12-29 stsp /* Let the auth_timeout handler tidy up. */
1651 5e25db14 2022-12-29 stsp client->auth = proc;
1652 5e25db14 2022-12-29 stsp client->required_auth = required_auth;
1653 b50a2b46 2022-12-29 stsp return NULL;
1656 eec68231 2022-12-14 stsp static void
1657 eec68231 2022-12-14 stsp apply_unveil_repo_readonly(const char *repo_path)
1659 eec68231 2022-12-14 stsp if (unveil(repo_path, "r") == -1)
1660 eec68231 2022-12-14 stsp fatal("unveil %s", repo_path);
1662 44587340 2022-12-30 stsp if (unveil(NULL, NULL) == -1)
1663 44587340 2022-12-30 stsp fatal("unveil");
1666 44587340 2022-12-30 stsp static void
1667 ae7c1b78 2023-01-10 stsp apply_unveil_repo_readwrite(const char *repo_path)
1669 ae7c1b78 2023-01-10 stsp if (unveil(repo_path, "rwc") == -1)
1670 ae7c1b78 2023-01-10 stsp fatal("unveil %s", repo_path);
1672 ae7c1b78 2023-01-10 stsp if (unveil(GOT_TMPDIR_STR, "rwc") == -1)
1673 ae7c1b78 2023-01-10 stsp fatal("unveil %s", GOT_TMPDIR_STR);
1675 ae7c1b78 2023-01-10 stsp if (unveil(NULL, NULL) == -1)
1676 ae7c1b78 2023-01-10 stsp fatal("unveil");
1679 ae7c1b78 2023-01-10 stsp static void
1680 44587340 2022-12-30 stsp apply_unveil_none(void)
1682 44587340 2022-12-30 stsp if (unveil("/", "") == -1)
1683 44587340 2022-12-30 stsp fatal("unveil");
1685 eec68231 2022-12-14 stsp if (unveil(NULL, NULL) == -1)
1686 eec68231 2022-12-14 stsp fatal("unveil");
1689 13b2bc37 2022-10-23 stsp static void
1690 ae7c1b78 2023-01-10 stsp apply_unveil_selfexec(void)
1692 b50a2b46 2022-12-29 stsp if (unveil(gotd.argv0, "x") == -1)
1693 b50a2b46 2022-12-29 stsp fatal("unveil %s", gotd.argv0);
1695 13b2bc37 2022-10-23 stsp if (unveil(NULL, NULL) == -1)
1696 13b2bc37 2022-10-23 stsp fatal("unveil");
1700 13b2bc37 2022-10-23 stsp main(int argc, char **argv)
1702 13b2bc37 2022-10-23 stsp const struct got_error *error = NULL;
1703 13b2bc37 2022-10-23 stsp int ch, fd = -1, daemonize = 1, verbosity = 0, noaction = 0;
1704 13b2bc37 2022-10-23 stsp const char *confpath = GOTD_CONF_PATH;
1705 13b2bc37 2022-10-23 stsp char *argv0 = argv[0];
1706 13b2bc37 2022-10-23 stsp char title[2048];
1707 13b2bc37 2022-10-23 stsp struct passwd *pw = NULL;
1708 13b2bc37 2022-10-23 stsp char *repo_path = NULL;
1709 13b2bc37 2022-10-23 stsp enum gotd_procid proc_id = PROC_GOTD;
1710 13b2bc37 2022-10-23 stsp struct event evsigint, evsigterm, evsighup, evsigusr1;
1711 13b2bc37 2022-10-23 stsp int *pack_fds = NULL, *temp_fds = NULL;
1713 13b2bc37 2022-10-23 stsp log_init(1, LOG_DAEMON); /* Log to stderr until daemonized. */
1715 ae7c1b78 2023-01-10 stsp while ((ch = getopt(argc, argv, "Adf:LnP:RSvW")) != -1) {
1716 13b2bc37 2022-10-23 stsp switch (ch) {
1718 5e25db14 2022-12-29 stsp proc_id = PROC_AUTH;
1721 13b2bc37 2022-10-23 stsp daemonize = 0;
1724 13b2bc37 2022-10-23 stsp confpath = optarg;
1727 d93ecf7d 2022-12-14 stsp proc_id = PROC_LISTEN;
1730 13b2bc37 2022-10-23 stsp noaction = 1;
1733 6f319063 2022-10-27 stsp repo_path = realpath(optarg, NULL);
1734 6f319063 2022-10-27 stsp if (repo_path == NULL)
1735 6f319063 2022-10-27 stsp fatal("realpath '%s'", optarg);
1738 13b2bc37 2022-10-23 stsp proc_id = PROC_REPO_READ;
1741 ae7c1b78 2023-01-10 stsp proc_id = PROC_SESSION;
1744 6f319063 2022-10-27 stsp if (verbosity < 3)
1745 6f319063 2022-10-27 stsp verbosity++;
1748 13b2bc37 2022-10-23 stsp proc_id = PROC_REPO_WRITE;
1755 13b2bc37 2022-10-23 stsp argc -= optind;
1756 13b2bc37 2022-10-23 stsp argv += optind;
1758 13b2bc37 2022-10-23 stsp if (argc != 0)
1761 b50a2b46 2022-12-29 stsp if (geteuid() && (proc_id == PROC_GOTD || proc_id == PROC_LISTEN))
1762 13b2bc37 2022-10-23 stsp fatalx("need root privileges");
1764 13b2bc37 2022-10-23 stsp if (parse_config(confpath, proc_id, &gotd) != 0)
1767 13b2bc37 2022-10-23 stsp pw = getpwnam(gotd.user_name);
1768 13b2bc37 2022-10-23 stsp if (pw == NULL)
1769 898c8f8f 2022-12-29 op fatalx("user %s not found", gotd.user_name);
1771 f4e8c21c 2023-01-17 op if (pw->pw_uid == 0)
1772 f4e8c21c 2023-01-17 op fatalx("cannot run %s as the superuser", getprogname());
1774 f4e8c21c 2023-01-17 op if (noaction) {
1775 f4e8c21c 2023-01-17 op fprintf(stderr, "configuration OK\n");
1779 f4e8c21c 2023-01-17 op gotd.argv0 = argv0;
1780 f4e8c21c 2023-01-17 op gotd.daemonize = daemonize;
1781 f4e8c21c 2023-01-17 op gotd.verbosity = verbosity;
1782 f4e8c21c 2023-01-17 op gotd.confpath = confpath;
1784 f4e8c21c 2023-01-17 op /* Require an absolute path in argv[0] for reliable re-exec. */
1785 f4e8c21c 2023-01-17 op if (!got_path_is_absolute(argv0))
1786 f4e8c21c 2023-01-17 op fatalx("bad path \"%s\": must be an absolute path", argv0);
1788 f4e8c21c 2023-01-17 op log_init(daemonize ? 0 : 1, LOG_DAEMON);
1789 f4e8c21c 2023-01-17 op log_setverbose(verbosity);
1791 b1142068 2022-12-05 stsp if (proc_id == PROC_GOTD) {
1792 d93ecf7d 2022-12-14 stsp snprintf(title, sizeof(title), "%s", gotd_proc_names[proc_id]);
1793 d93ecf7d 2022-12-14 stsp arc4random_buf(&clients_hash_key, sizeof(clients_hash_key));
1794 d93ecf7d 2022-12-14 stsp if (daemonize && daemon(1, 0) == -1)
1795 d93ecf7d 2022-12-14 stsp fatal("daemon");
1796 f7eb3370 2023-01-23 stsp gotd.pid = getpid();
1797 f7eb3370 2023-01-23 stsp start_listener(argv0, confpath, daemonize, verbosity);
1798 d93ecf7d 2022-12-14 stsp } else if (proc_id == PROC_LISTEN) {
1799 d93ecf7d 2022-12-14 stsp snprintf(title, sizeof(title), "%s", gotd_proc_names[proc_id]);
1800 b1142068 2022-12-05 stsp if (verbosity) {
1801 b1142068 2022-12-05 stsp log_info("socket: %s", gotd.unix_socket_path);
1802 b1142068 2022-12-05 stsp log_info("user: %s", pw->pw_name);
1805 13b2bc37 2022-10-23 stsp fd = unix_socket_listen(gotd.unix_socket_path, pw->pw_uid,
1806 6f854dde 2023-01-04 stsp pw->pw_gid);
1807 13b2bc37 2022-10-23 stsp if (fd == -1) {
1808 13b2bc37 2022-10-23 stsp fatal("cannot listen on unix socket %s",
1809 13b2bc37 2022-10-23 stsp gotd.unix_socket_path);
1811 5e25db14 2022-12-29 stsp } else if (proc_id == PROC_AUTH) {
1812 5e25db14 2022-12-29 stsp snprintf(title, sizeof(title), "%s %s",
1813 5e25db14 2022-12-29 stsp gotd_proc_names[proc_id], repo_path);
1814 ae7c1b78 2023-01-10 stsp } else if (proc_id == PROC_REPO_READ || proc_id == PROC_REPO_WRITE ||
1815 ae7c1b78 2023-01-10 stsp proc_id == PROC_SESSION) {
1816 13b2bc37 2022-10-23 stsp error = got_repo_pack_fds_open(&pack_fds);
1817 13b2bc37 2022-10-23 stsp if (error != NULL)
1818 13b2bc37 2022-10-23 stsp fatalx("cannot open pack tempfiles: %s", error->msg);
1819 13b2bc37 2022-10-23 stsp error = got_repo_temp_fds_open(&temp_fds);
1820 13b2bc37 2022-10-23 stsp if (error != NULL)
1821 13b2bc37 2022-10-23 stsp fatalx("cannot open pack tempfiles: %s", error->msg);
1822 13b2bc37 2022-10-23 stsp if (repo_path == NULL)
1823 13b2bc37 2022-10-23 stsp fatalx("repository path not specified");
1824 13b2bc37 2022-10-23 stsp snprintf(title, sizeof(title), "%s %s",
1825 13b2bc37 2022-10-23 stsp gotd_proc_names[proc_id], repo_path);
1827 13b2bc37 2022-10-23 stsp fatal("invalid process id %d", proc_id);
1829 13b2bc37 2022-10-23 stsp setproctitle("%s", title);
1830 13b2bc37 2022-10-23 stsp log_procinit(title);
1832 13b2bc37 2022-10-23 stsp /* Drop root privileges. */
1833 13b2bc37 2022-10-23 stsp if (setgid(pw->pw_gid) == -1)
1834 13b2bc37 2022-10-23 stsp fatal("setgid %d failed", pw->pw_gid);
1835 13b2bc37 2022-10-23 stsp if (setuid(pw->pw_uid) == -1)
1836 13b2bc37 2022-10-23 stsp fatal("setuid %d failed", pw->pw_uid);
1838 13b2bc37 2022-10-23 stsp event_init();
1840 13b2bc37 2022-10-23 stsp switch (proc_id) {
1841 13b2bc37 2022-10-23 stsp case PROC_GOTD:
1842 13b2bc37 2022-10-23 stsp #ifndef PROFILE
1843 ae7c1b78 2023-01-10 stsp /* "exec" promise will be limited to argv[0] via unveil(2). */
1844 ae7c1b78 2023-01-10 stsp if (pledge("stdio proc exec sendfd recvfd unveil", NULL) == -1)
1845 13b2bc37 2022-10-23 stsp err(1, "pledge");
1848 d93ecf7d 2022-12-14 stsp case PROC_LISTEN:
1849 d93ecf7d 2022-12-14 stsp #ifndef PROFILE
1850 77f619a8 2023-01-04 stsp if (pledge("stdio sendfd unix unveil", NULL) == -1)
1851 d93ecf7d 2022-12-14 stsp err(1, "pledge");
1854 77f619a8 2023-01-04 stsp * Ensure that AF_UNIX bind(2) cannot be used with any other
1855 77f619a8 2023-01-04 stsp * sockets by revoking all filesystem access via unveil(2).
1857 77f619a8 2023-01-04 stsp apply_unveil_none();
1859 40b85cca 2023-01-03 stsp listen_main(title, fd, gotd.connection_limits,
1860 40b85cca 2023-01-03 stsp gotd.nconnection_limits);
1861 d93ecf7d 2022-12-14 stsp /* NOTREACHED */
1863 5e25db14 2022-12-29 stsp case PROC_AUTH:
1864 5e25db14 2022-12-29 stsp #ifndef PROFILE
1865 44587340 2022-12-30 stsp if (pledge("stdio getpw recvfd unix unveil", NULL) == -1)
1866 5e25db14 2022-12-29 stsp err(1, "pledge");
1869 44587340 2022-12-30 stsp * We need the "unix" pledge promise for getpeername(2) only.
1870 44587340 2022-12-30 stsp * Ensure that AF_UNIX bind(2) cannot be used by revoking all
1871 44587340 2022-12-30 stsp * filesystem access via unveil(2). Access to password database
1872 44587340 2022-12-30 stsp * files will still work since "getpw" bypasses unveil(2).
1874 44587340 2022-12-30 stsp apply_unveil_none();
1876 5e25db14 2022-12-29 stsp auth_main(title, &gotd.repos, repo_path);
1877 5e25db14 2022-12-29 stsp /* NOTREACHED */
1879 ae7c1b78 2023-01-10 stsp case PROC_SESSION:
1880 ae7c1b78 2023-01-10 stsp #ifndef PROFILE
1882 ae7c1b78 2023-01-10 stsp * The "recvfd" promise is only needed during setup and
1883 ae7c1b78 2023-01-10 stsp * will be removed in a later pledge(2) call.
1885 ae7c1b78 2023-01-10 stsp if (pledge("stdio rpath wpath cpath recvfd sendfd fattr flock "
1886 ae7c1b78 2023-01-10 stsp "unveil", NULL) == -1)
1887 ae7c1b78 2023-01-10 stsp err(1, "pledge");
1889 ae7c1b78 2023-01-10 stsp apply_unveil_repo_readwrite(repo_path);
1890 ae7c1b78 2023-01-10 stsp session_main(title, repo_path, pack_fds, temp_fds,
1891 ae7c1b78 2023-01-10 stsp &gotd.request_timeout);
1892 ae7c1b78 2023-01-10 stsp /* NOTREACHED */
1894 13b2bc37 2022-10-23 stsp case PROC_REPO_READ:
1895 13b2bc37 2022-10-23 stsp #ifndef PROFILE
1896 eec68231 2022-12-14 stsp if (pledge("stdio rpath recvfd unveil", NULL) == -1)
1897 13b2bc37 2022-10-23 stsp err(1, "pledge");
1899 eec68231 2022-12-14 stsp apply_unveil_repo_readonly(repo_path);
1900 eec68231 2022-12-14 stsp repo_read_main(title, repo_path, pack_fds, temp_fds);
1901 13b2bc37 2022-10-23 stsp /* NOTREACHED */
1903 13b2bc37 2022-10-23 stsp case PROC_REPO_WRITE:
1904 13b2bc37 2022-10-23 stsp #ifndef PROFILE
1905 eec68231 2022-12-14 stsp if (pledge("stdio rpath recvfd unveil", NULL) == -1)
1906 13b2bc37 2022-10-23 stsp err(1, "pledge");
1908 eec68231 2022-12-14 stsp apply_unveil_repo_readonly(repo_path);
1909 eec68231 2022-12-14 stsp repo_write_main(title, repo_path, pack_fds, temp_fds);
1910 13b2bc37 2022-10-23 stsp /* NOTREACHED */
1913 13b2bc37 2022-10-23 stsp fatal("invalid process id %d", proc_id);
1916 13b2bc37 2022-10-23 stsp if (proc_id != PROC_GOTD)
1917 13b2bc37 2022-10-23 stsp fatal("invalid process id %d", proc_id);
1919 ae7c1b78 2023-01-10 stsp apply_unveil_selfexec();
1921 13b2bc37 2022-10-23 stsp signal_set(&evsigint, SIGINT, gotd_sighdlr, NULL);
1922 13b2bc37 2022-10-23 stsp signal_set(&evsigterm, SIGTERM, gotd_sighdlr, NULL);
1923 13b2bc37 2022-10-23 stsp signal_set(&evsighup, SIGHUP, gotd_sighdlr, NULL);
1924 13b2bc37 2022-10-23 stsp signal_set(&evsigusr1, SIGUSR1, gotd_sighdlr, NULL);
1925 13b2bc37 2022-10-23 stsp signal(SIGPIPE, SIG_IGN);
1927 13b2bc37 2022-10-23 stsp signal_add(&evsigint, NULL);
1928 13b2bc37 2022-10-23 stsp signal_add(&evsigterm, NULL);
1929 13b2bc37 2022-10-23 stsp signal_add(&evsighup, NULL);
1930 13b2bc37 2022-10-23 stsp signal_add(&evsigusr1, NULL);
1932 b50a2b46 2022-12-29 stsp gotd_imsg_event_add(&gotd.listen_proc.iev);
1934 13b2bc37 2022-10-23 stsp event_dispatch();
1936 13b2bc37 2022-10-23 stsp free(repo_path);
1937 ae7c1b78 2023-01-10 stsp gotd_shutdown();
