2 3efd8e31 2022-10-23 thomas * Copyright (c) 2022 Stefan Sperling <stsp@openbsd.org>
4 3efd8e31 2022-10-23 thomas * Permission to use, copy, modify, and distribute this software for any
5 3efd8e31 2022-10-23 thomas * purpose with or without fee is hereby granted, provided that the above
6 3efd8e31 2022-10-23 thomas * copyright notice and this permission notice appear in all copies.
8 3efd8e31 2022-10-23 thomas * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 3efd8e31 2022-10-23 thomas * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 3efd8e31 2022-10-23 thomas * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 3efd8e31 2022-10-23 thomas * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 3efd8e31 2022-10-23 thomas * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 3efd8e31 2022-10-23 thomas * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 3efd8e31 2022-10-23 thomas * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 3efd8e31 2022-10-23 thomas #include <sys/queue.h>
18 3efd8e31 2022-10-23 thomas #include <sys/tree.h>
19 3efd8e31 2022-10-23 thomas #include <sys/time.h>
20 3efd8e31 2022-10-23 thomas #include <sys/types.h>
21 3efd8e31 2022-10-23 thomas #include <sys/stat.h>
22 3efd8e31 2022-10-23 thomas #include <sys/socket.h>
23 3efd8e31 2022-10-23 thomas #include <sys/un.h>
24 3efd8e31 2022-10-23 thomas #include <sys/wait.h>
26 3efd8e31 2022-10-23 thomas #include <fcntl.h>
27 3efd8e31 2022-10-23 thomas #include <err.h>
28 3efd8e31 2022-10-23 thomas #include <errno.h>
29 3efd8e31 2022-10-23 thomas #include <event.h>
30 3efd8e31 2022-10-23 thomas #include <limits.h>
31 3efd8e31 2022-10-23 thomas #include <pwd.h>
32 3efd8e31 2022-10-23 thomas #include <grp.h>
33 3efd8e31 2022-10-23 thomas #include <imsg.h>
34 3efd8e31 2022-10-23 thomas #include <sha1.h>
35 3efd8e31 2022-10-23 thomas #include <signal.h>
36 3efd8e31 2022-10-23 thomas #include <siphash.h>
37 3efd8e31 2022-10-23 thomas #include <stdarg.h>
38 3efd8e31 2022-10-23 thomas #include <stdio.h>
39 3efd8e31 2022-10-23 thomas #include <stdlib.h>
40 3efd8e31 2022-10-23 thomas #include <string.h>
41 3efd8e31 2022-10-23 thomas #include <syslog.h>
42 3efd8e31 2022-10-23 thomas #include <unistd.h>
44 3efd8e31 2022-10-23 thomas #include "got_error.h"
45 3efd8e31 2022-10-23 thomas #include "got_opentemp.h"
46 3efd8e31 2022-10-23 thomas #include "got_path.h"
47 3efd8e31 2022-10-23 thomas #include "got_repository.h"
48 3efd8e31 2022-10-23 thomas #include "got_object.h"
49 3efd8e31 2022-10-23 thomas #include "got_reference.h"
51 3efd8e31 2022-10-23 thomas #include "got_lib_delta.h"
52 3efd8e31 2022-10-23 thomas #include "got_lib_object.h"
53 3efd8e31 2022-10-23 thomas #include "got_lib_object_cache.h"
54 3efd8e31 2022-10-23 thomas #include "got_lib_sha1.h"
55 3efd8e31 2022-10-23 thomas #include "got_lib_gitproto.h"
56 3efd8e31 2022-10-23 thomas #include "got_lib_pack.h"
57 3efd8e31 2022-10-23 thomas #include "got_lib_repository.h"
59 3efd8e31 2022-10-23 thomas #include "gotd.h"
60 3efd8e31 2022-10-23 thomas #include "log.h"
61 2b3d32a1 2022-12-30 thomas #include "listen.h"
62 729a7e24 2022-11-17 thomas #include "auth.h"
63 3efd8e31 2022-10-23 thomas #include "repo_read.h"
64 3efd8e31 2022-10-23 thomas #include "repo_write.h"
66 3efd8e31 2022-10-23 thomas #ifndef nitems
67 3efd8e31 2022-10-23 thomas #define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
70 3efd8e31 2022-10-23 thomas struct gotd_client {
71 3efd8e31 2022-10-23 thomas STAILQ_ENTRY(gotd_client) entry;
72 3efd8e31 2022-10-23 thomas enum gotd_client_state state;
73 3efd8e31 2022-10-23 thomas struct gotd_client_capability *capabilities;
74 3efd8e31 2022-10-23 thomas size_t ncapa_alloc;
75 3efd8e31 2022-10-23 thomas size_t ncapabilities;
76 3efd8e31 2022-10-23 thomas uint32_t id;
78 3efd8e31 2022-10-23 thomas int delta_cache_fd;
79 3efd8e31 2022-10-23 thomas struct gotd_imsgev iev;
80 3efd8e31 2022-10-23 thomas struct event tmo;
81 3efd8e31 2022-10-23 thomas uid_t euid;
82 3efd8e31 2022-10-23 thomas gid_t egid;
83 3efd8e31 2022-10-23 thomas struct gotd_child_proc *repo_read;
84 3efd8e31 2022-10-23 thomas struct gotd_child_proc *repo_write;
85 c669c489 2022-12-30 thomas struct gotd_child_proc *auth;
86 c669c489 2022-12-30 thomas int required_auth;
87 3efd8e31 2022-10-23 thomas char *packfile_path;
88 3efd8e31 2022-10-23 thomas char *packidx_path;
89 3efd8e31 2022-10-23 thomas int nref_updates;
91 3efd8e31 2022-10-23 thomas STAILQ_HEAD(gotd_clients, gotd_client);
93 3efd8e31 2022-10-23 thomas static struct gotd_clients gotd_clients[GOTD_CLIENT_TABLE_SIZE];
94 3efd8e31 2022-10-23 thomas static SIPHASH_KEY clients_hash_key;
95 3efd8e31 2022-10-23 thomas volatile int client_cnt;
96 3efd8e31 2022-10-23 thomas static struct timeval timeout = { 3600, 0 };
97 3efd8e31 2022-10-23 thomas static struct gotd gotd;
99 3efd8e31 2022-10-23 thomas void gotd_sighdlr(int sig, short event, void *arg);
100 c902213d 2022-10-29 thomas static void gotd_shutdown(void);
101 85b37c72 2022-12-30 thomas static const struct got_error *start_repo_child(struct gotd_client *,
102 85b37c72 2022-12-30 thomas enum gotd_procid, struct gotd_repo *, char *, const char *, int, int);
103 c669c489 2022-12-30 thomas static const struct got_error *start_auth_child(struct gotd_client *, int,
104 c669c489 2022-12-30 thomas struct gotd_repo *, char *, const char *, int, int);
105 85b37c72 2022-12-30 thomas static void kill_proc(struct gotd_child_proc *, int);
107 3efd8e31 2022-10-23 thomas __dead static void
110 5ac853dc 2022-10-24 thomas fprintf(stderr, "usage: %s [-dv] [-f config-file]\n", getprogname());
114 3efd8e31 2022-10-23 thomas static int
115 3efd8e31 2022-10-23 thomas unix_socket_listen(const char *unix_socket_path, uid_t uid, gid_t gid)
117 3efd8e31 2022-10-23 thomas struct sockaddr_un sun;
118 3efd8e31 2022-10-23 thomas int fd = -1;
119 3efd8e31 2022-10-23 thomas mode_t old_umask, mode;
121 3efd8e31 2022-10-23 thomas fd = socket(AF_UNIX, SOCK_STREAM | SOCK_NONBLOCK| SOCK_CLOEXEC, 0);
122 3efd8e31 2022-10-23 thomas if (fd == -1) {
123 3efd8e31 2022-10-23 thomas log_warn("socket");
124 3efd8e31 2022-10-23 thomas return -1;
127 3efd8e31 2022-10-23 thomas sun.sun_family = AF_UNIX;
128 3efd8e31 2022-10-23 thomas if (strlcpy(sun.sun_path, unix_socket_path,
129 3efd8e31 2022-10-23 thomas sizeof(sun.sun_path)) >= sizeof(sun.sun_path)) {
130 3efd8e31 2022-10-23 thomas log_warnx("%s: name too long", unix_socket_path);
131 3efd8e31 2022-10-23 thomas close(fd);
132 3efd8e31 2022-10-23 thomas return -1;
135 3efd8e31 2022-10-23 thomas if (unlink(unix_socket_path) == -1) {
136 3efd8e31 2022-10-23 thomas if (errno != ENOENT) {
137 3efd8e31 2022-10-23 thomas log_warn("unlink %s", unix_socket_path);
138 3efd8e31 2022-10-23 thomas close(fd);
139 3efd8e31 2022-10-23 thomas return -1;
143 3efd8e31 2022-10-23 thomas old_umask = umask(S_IXUSR|S_IXGRP|S_IWOTH|S_IROTH|S_IXOTH);
144 3efd8e31 2022-10-23 thomas mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP;
146 3efd8e31 2022-10-23 thomas if (bind(fd, (struct sockaddr *)&sun, sizeof(sun)) == -1) {
147 3efd8e31 2022-10-23 thomas log_warn("bind: %s", unix_socket_path);
148 3efd8e31 2022-10-23 thomas close(fd);
149 3efd8e31 2022-10-23 thomas umask(old_umask);
150 3efd8e31 2022-10-23 thomas return -1;
153 3efd8e31 2022-10-23 thomas umask(old_umask);
155 3efd8e31 2022-10-23 thomas if (chmod(unix_socket_path, mode) == -1) {
156 3efd8e31 2022-10-23 thomas log_warn("chmod %o %s", mode, unix_socket_path);
157 3efd8e31 2022-10-23 thomas close(fd);
158 3efd8e31 2022-10-23 thomas unlink(unix_socket_path);
159 3efd8e31 2022-10-23 thomas return -1;
162 3efd8e31 2022-10-23 thomas if (chown(unix_socket_path, uid, gid) == -1) {
163 3efd8e31 2022-10-23 thomas log_warn("chown %s uid=%d gid=%d", unix_socket_path, uid, gid);
164 3efd8e31 2022-10-23 thomas close(fd);
165 3efd8e31 2022-10-23 thomas unlink(unix_socket_path);
166 3efd8e31 2022-10-23 thomas return -1;
169 3efd8e31 2022-10-23 thomas if (listen(fd, GOTD_UNIX_SOCKET_BACKLOG) == -1) {
170 3efd8e31 2022-10-23 thomas log_warn("listen");
171 3efd8e31 2022-10-23 thomas close(fd);
172 3efd8e31 2022-10-23 thomas unlink(unix_socket_path);
173 3efd8e31 2022-10-23 thomas return -1;
176 3efd8e31 2022-10-23 thomas return fd;
179 3efd8e31 2022-10-23 thomas static struct group *
180 3efd8e31 2022-10-23 thomas match_group(gid_t *groups, int ngroups, const char *unix_group_name)
182 3efd8e31 2022-10-23 thomas struct group *gr;
185 3efd8e31 2022-10-23 thomas for (i = 0; i < ngroups; i++) {
186 3efd8e31 2022-10-23 thomas gr = getgrgid(groups[i]);
187 3efd8e31 2022-10-23 thomas if (gr == NULL) {
188 3efd8e31 2022-10-23 thomas log_warn("getgrgid %d", groups[i]);
189 3efd8e31 2022-10-23 thomas continue;
191 3efd8e31 2022-10-23 thomas if (strcmp(gr->gr_name, unix_group_name) == 0)
192 3efd8e31 2022-10-23 thomas return gr;
195 3efd8e31 2022-10-23 thomas return NULL;
198 3efd8e31 2022-10-23 thomas static uint64_t
199 3efd8e31 2022-10-23 thomas client_hash(uint32_t client_id)
201 3efd8e31 2022-10-23 thomas return SipHash24(&clients_hash_key, &client_id, sizeof(client_id));
204 3efd8e31 2022-10-23 thomas static void
205 3efd8e31 2022-10-23 thomas add_client(struct gotd_client *client)
207 3efd8e31 2022-10-23 thomas uint64_t slot = client_hash(client->id) % nitems(gotd_clients);
208 3efd8e31 2022-10-23 thomas STAILQ_INSERT_HEAD(&gotd_clients[slot], client, entry);
209 3efd8e31 2022-10-23 thomas client_cnt++;
212 3efd8e31 2022-10-23 thomas static struct gotd_client *
213 3efd8e31 2022-10-23 thomas find_client(uint32_t client_id)
215 3efd8e31 2022-10-23 thomas uint64_t slot;
216 3efd8e31 2022-10-23 thomas struct gotd_client *c;
218 3efd8e31 2022-10-23 thomas slot = client_hash(client_id) % nitems(gotd_clients);
219 3efd8e31 2022-10-23 thomas STAILQ_FOREACH(c, &gotd_clients[slot], entry) {
220 3efd8e31 2022-10-23 thomas if (c->id == client_id)
221 3efd8e31 2022-10-23 thomas return c;
224 3efd8e31 2022-10-23 thomas return NULL;
227 3efd8e31 2022-10-23 thomas static struct gotd_child_proc *
228 3efd8e31 2022-10-23 thomas get_client_proc(struct gotd_client *client)
230 3efd8e31 2022-10-23 thomas if (client->repo_read && client->repo_write) {
231 3efd8e31 2022-10-23 thomas fatalx("uid %d is reading and writing in the same session",
232 3efd8e31 2022-10-23 thomas client->euid);
233 3efd8e31 2022-10-23 thomas /* NOTREACHED */
236 3efd8e31 2022-10-23 thomas if (client->repo_read)
237 3efd8e31 2022-10-23 thomas return client->repo_read;
238 3efd8e31 2022-10-23 thomas else if (client->repo_write)
239 3efd8e31 2022-10-23 thomas return client->repo_write;
241 85b37c72 2022-12-30 thomas return NULL;
244 85b37c72 2022-12-30 thomas static struct gotd_client *
245 85b37c72 2022-12-30 thomas find_client_by_proc_fd(int fd)
247 85b37c72 2022-12-30 thomas uint64_t slot;
249 85b37c72 2022-12-30 thomas for (slot = 0; slot < nitems(gotd_clients); slot++) {
250 85b37c72 2022-12-30 thomas struct gotd_client *c;
252 85b37c72 2022-12-30 thomas STAILQ_FOREACH(c, &gotd_clients[slot], entry) {
253 85b37c72 2022-12-30 thomas struct gotd_child_proc *proc = get_client_proc(c);
254 85b37c72 2022-12-30 thomas if (proc && proc->iev.ibuf.fd == fd)
255 85b37c72 2022-12-30 thomas return c;
256 c669c489 2022-12-30 thomas if (c->auth && c->auth->iev.ibuf.fd == fd)
257 c669c489 2022-12-30 thomas return c;
261 3efd8e31 2022-10-23 thomas return NULL;
264 3efd8e31 2022-10-23 thomas static int
265 3efd8e31 2022-10-23 thomas client_is_reading(struct gotd_client *client)
267 3efd8e31 2022-10-23 thomas return client->repo_read != NULL;
270 3efd8e31 2022-10-23 thomas static int
271 3efd8e31 2022-10-23 thomas client_is_writing(struct gotd_client *client)
273 3efd8e31 2022-10-23 thomas return client->repo_write != NULL;
276 3efd8e31 2022-10-23 thomas static const struct got_error *
277 3efd8e31 2022-10-23 thomas ensure_client_is_reading(struct gotd_client *client)
279 3efd8e31 2022-10-23 thomas if (!client_is_reading(client)) {
280 3efd8e31 2022-10-23 thomas return got_error_fmt(GOT_ERR_BAD_PACKET,
281 3efd8e31 2022-10-23 thomas "uid %d made a read-request but is not reading from "
282 3efd8e31 2022-10-23 thomas "a repository", client->euid);
285 3efd8e31 2022-10-23 thomas return NULL;
288 3efd8e31 2022-10-23 thomas static const struct got_error *
289 3efd8e31 2022-10-23 thomas ensure_client_is_writing(struct gotd_client *client)
291 3efd8e31 2022-10-23 thomas if (!client_is_writing(client)) {
292 3efd8e31 2022-10-23 thomas return got_error_fmt(GOT_ERR_BAD_PACKET,
293 3efd8e31 2022-10-23 thomas "uid %d made a write-request but is not writing to "
294 3efd8e31 2022-10-23 thomas "a repository", client->euid);
297 3efd8e31 2022-10-23 thomas return NULL;
300 3efd8e31 2022-10-23 thomas static const struct got_error *
301 3efd8e31 2022-10-23 thomas ensure_client_is_not_writing(struct gotd_client *client)
303 3efd8e31 2022-10-23 thomas if (client_is_writing(client)) {
304 3efd8e31 2022-10-23 thomas return got_error_fmt(GOT_ERR_BAD_PACKET,
305 3efd8e31 2022-10-23 thomas "uid %d made a read-request but is writing to "
306 3efd8e31 2022-10-23 thomas "a repository", client->euid);
309 3efd8e31 2022-10-23 thomas return NULL;
312 3efd8e31 2022-10-23 thomas static const struct got_error *
313 3efd8e31 2022-10-23 thomas ensure_client_is_not_reading(struct gotd_client *client)
315 3efd8e31 2022-10-23 thomas if (client_is_reading(client)) {
316 3efd8e31 2022-10-23 thomas return got_error_fmt(GOT_ERR_BAD_PACKET,
317 3efd8e31 2022-10-23 thomas "uid %d made a write-request but is reading from "
318 3efd8e31 2022-10-23 thomas "a repository", client->euid);
321 3efd8e31 2022-10-23 thomas return NULL;
324 85b37c72 2022-12-30 thomas static void
325 c669c489 2022-12-30 thomas wait_for_child(pid_t child_pid)
327 85b37c72 2022-12-30 thomas pid_t pid;
328 85b37c72 2022-12-30 thomas int status;
330 c669c489 2022-12-30 thomas log_debug("waiting for child PID %ld to terminate",
331 c669c489 2022-12-30 thomas (long)child_pid);
334 c669c489 2022-12-30 thomas pid = waitpid(child_pid, &status, WNOHANG);
335 85b37c72 2022-12-30 thomas if (pid == -1) {
336 85b37c72 2022-12-30 thomas if (errno != EINTR && errno != ECHILD)
337 85b37c72 2022-12-30 thomas fatal("wait");
338 85b37c72 2022-12-30 thomas } else if (WIFSIGNALED(status)) {
339 85b37c72 2022-12-30 thomas log_warnx("child PID %ld terminated; signal %d",
340 85b37c72 2022-12-30 thomas (long)pid, WTERMSIG(status));
342 85b37c72 2022-12-30 thomas } while (pid != -1 || (pid == -1 && errno == EINTR));
345 3efd8e31 2022-10-23 thomas static void
346 c669c489 2022-12-30 thomas kill_auth_proc(struct gotd_client *client)
348 c669c489 2022-12-30 thomas struct gotd_child_proc *proc;
350 c669c489 2022-12-30 thomas if (client->auth == NULL)
353 c669c489 2022-12-30 thomas proc = client->auth;
354 c669c489 2022-12-30 thomas client->auth = NULL;
356 c669c489 2022-12-30 thomas event_del(&proc->iev.ev);
357 c669c489 2022-12-30 thomas msgbuf_clear(&proc->iev.ibuf.w);
358 c669c489 2022-12-30 thomas close(proc->iev.ibuf.fd);
359 c669c489 2022-12-30 thomas kill_proc(proc, 0);
360 c669c489 2022-12-30 thomas wait_for_child(proc->pid);
361 c669c489 2022-12-30 thomas free(proc);
364 c669c489 2022-12-30 thomas static void
365 3efd8e31 2022-10-23 thomas disconnect(struct gotd_client *client)
367 3efd8e31 2022-10-23 thomas struct gotd_imsg_disconnect idisconnect;
368 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc = get_client_proc(client);
369 85b37c72 2022-12-30 thomas struct gotd_child_proc *listen_proc = &gotd.listen_proc;
370 3efd8e31 2022-10-23 thomas uint64_t slot;
372 3efd8e31 2022-10-23 thomas log_debug("uid %d: disconnecting", client->euid);
374 c669c489 2022-12-30 thomas kill_auth_proc(client);
376 3efd8e31 2022-10-23 thomas idisconnect.client_id = client->id;
377 c902213d 2022-10-29 thomas if (proc) {
378 c902213d 2022-10-29 thomas if (gotd_imsg_compose_event(&proc->iev,
379 c902213d 2022-10-29 thomas GOTD_IMSG_DISCONNECT, PROC_GOTD, -1,
380 c902213d 2022-10-29 thomas &idisconnect, sizeof(idisconnect)) == -1)
381 c902213d 2022-10-29 thomas log_warn("imsg compose DISCONNECT");
383 85b37c72 2022-12-30 thomas msgbuf_clear(&proc->iev.ibuf.w);
384 85b37c72 2022-12-30 thomas close(proc->iev.ibuf.fd);
385 85b37c72 2022-12-30 thomas kill_proc(proc, 0);
386 c669c489 2022-12-30 thomas wait_for_child(proc->pid);
387 85b37c72 2022-12-30 thomas free(proc);
388 85b37c72 2022-12-30 thomas proc = NULL;
391 2b3d32a1 2022-12-30 thomas if (gotd_imsg_compose_event(&listen_proc->iev,
392 2b3d32a1 2022-12-30 thomas GOTD_IMSG_DISCONNECT, PROC_GOTD, -1,
393 2b3d32a1 2022-12-30 thomas &idisconnect, sizeof(idisconnect)) == -1)
394 2b3d32a1 2022-12-30 thomas log_warn("imsg compose DISCONNECT");
396 3efd8e31 2022-10-23 thomas slot = client_hash(client->id) % nitems(gotd_clients);
397 3efd8e31 2022-10-23 thomas STAILQ_REMOVE(&gotd_clients[slot], client, gotd_client, entry);
398 3efd8e31 2022-10-23 thomas imsg_clear(&client->iev.ibuf);
399 3efd8e31 2022-10-23 thomas event_del(&client->iev.ev);
400 3efd8e31 2022-10-23 thomas evtimer_del(&client->tmo);
401 3efd8e31 2022-10-23 thomas close(client->fd);
402 3efd8e31 2022-10-23 thomas if (client->delta_cache_fd != -1)
403 3efd8e31 2022-10-23 thomas close(client->delta_cache_fd);
404 3efd8e31 2022-10-23 thomas if (client->packfile_path) {
405 3efd8e31 2022-10-23 thomas if (unlink(client->packfile_path) == -1 && errno != ENOENT)
406 3efd8e31 2022-10-23 thomas log_warn("unlink %s: ", client->packfile_path);
407 3efd8e31 2022-10-23 thomas free(client->packfile_path);
409 3efd8e31 2022-10-23 thomas if (client->packidx_path) {
410 3efd8e31 2022-10-23 thomas if (unlink(client->packidx_path) == -1 && errno != ENOENT)
411 3efd8e31 2022-10-23 thomas log_warn("unlink %s: ", client->packidx_path);
412 3efd8e31 2022-10-23 thomas free(client->packidx_path);
414 3efd8e31 2022-10-23 thomas free(client->capabilities);
415 3efd8e31 2022-10-23 thomas free(client);
416 3efd8e31 2022-10-23 thomas client_cnt--;
419 3efd8e31 2022-10-23 thomas static void
420 3efd8e31 2022-10-23 thomas disconnect_on_error(struct gotd_client *client, const struct got_error *err)
422 3efd8e31 2022-10-23 thomas struct imsgbuf ibuf;
424 3efd8e31 2022-10-23 thomas log_warnx("uid %d: %s", client->euid, err->msg);
425 3efd8e31 2022-10-23 thomas if (err->code != GOT_ERR_EOF) {
426 3efd8e31 2022-10-23 thomas imsg_init(&ibuf, client->fd);
427 3efd8e31 2022-10-23 thomas gotd_imsg_send_error(&ibuf, 0, PROC_GOTD, err);
428 3efd8e31 2022-10-23 thomas imsg_clear(&ibuf);
430 3efd8e31 2022-10-23 thomas disconnect(client);
433 c902213d 2022-10-29 thomas static const struct got_error *
434 c902213d 2022-10-29 thomas send_repo_info(struct gotd_imsgev *iev, struct gotd_repo *repo)
436 c902213d 2022-10-29 thomas const struct got_error *err = NULL;
437 c902213d 2022-10-29 thomas struct gotd_imsg_info_repo irepo;
439 c902213d 2022-10-29 thomas memset(&irepo, 0, sizeof(irepo));
441 c902213d 2022-10-29 thomas if (strlcpy(irepo.repo_name, repo->name, sizeof(irepo.repo_name))
442 c902213d 2022-10-29 thomas >= sizeof(irepo.repo_name))
443 c902213d 2022-10-29 thomas return got_error_msg(GOT_ERR_NO_SPACE, "repo name too long");
444 c902213d 2022-10-29 thomas if (strlcpy(irepo.repo_path, repo->path, sizeof(irepo.repo_path))
445 c902213d 2022-10-29 thomas >= sizeof(irepo.repo_path))
446 c902213d 2022-10-29 thomas return got_error_msg(GOT_ERR_NO_SPACE, "repo path too long");
448 c902213d 2022-10-29 thomas if (gotd_imsg_compose_event(iev, GOTD_IMSG_INFO_REPO, PROC_GOTD, -1,
449 c902213d 2022-10-29 thomas &irepo, sizeof(irepo)) == -1) {
450 c902213d 2022-10-29 thomas err = got_error_from_errno("imsg compose INFO_REPO");
452 c902213d 2022-10-29 thomas return err;
455 c902213d 2022-10-29 thomas return NULL;
458 c902213d 2022-10-29 thomas static const struct got_error *
459 c902213d 2022-10-29 thomas send_capability(struct gotd_client_capability *capa, struct gotd_imsgev* iev)
461 c902213d 2022-10-29 thomas const struct got_error *err = NULL;
462 c902213d 2022-10-29 thomas struct gotd_imsg_capability icapa;
463 c902213d 2022-10-29 thomas size_t len;
464 c902213d 2022-10-29 thomas struct ibuf *wbuf;
466 c902213d 2022-10-29 thomas memset(&icapa, 0, sizeof(icapa));
468 c902213d 2022-10-29 thomas icapa.key_len = strlen(capa->key);
469 c902213d 2022-10-29 thomas len = sizeof(icapa) + icapa.key_len;
470 c902213d 2022-10-29 thomas if (capa->value) {
471 c902213d 2022-10-29 thomas icapa.value_len = strlen(capa->value);
472 c902213d 2022-10-29 thomas len += icapa.value_len;
475 c902213d 2022-10-29 thomas wbuf = imsg_create(&iev->ibuf, GOTD_IMSG_CAPABILITY, 0, 0, len);
476 c902213d 2022-10-29 thomas if (wbuf == NULL) {
477 c902213d 2022-10-29 thomas err = got_error_from_errno("imsg_create CAPABILITY");
478 c902213d 2022-10-29 thomas return err;
481 c902213d 2022-10-29 thomas if (imsg_add(wbuf, &icapa, sizeof(icapa)) == -1)
482 c902213d 2022-10-29 thomas return got_error_from_errno("imsg_add CAPABILITY");
483 c902213d 2022-10-29 thomas if (imsg_add(wbuf, capa->key, icapa.key_len) == -1)
484 c902213d 2022-10-29 thomas return got_error_from_errno("imsg_add CAPABILITY");
485 c902213d 2022-10-29 thomas if (capa->value) {
486 c902213d 2022-10-29 thomas if (imsg_add(wbuf, capa->value, icapa.value_len) == -1)
487 c902213d 2022-10-29 thomas return got_error_from_errno("imsg_add CAPABILITY");
490 c902213d 2022-10-29 thomas wbuf->fd = -1;
491 c902213d 2022-10-29 thomas imsg_close(&iev->ibuf, wbuf);
493 c902213d 2022-10-29 thomas gotd_imsg_event_add(iev);
495 c902213d 2022-10-29 thomas return NULL;
498 c902213d 2022-10-29 thomas static const struct got_error *
499 c902213d 2022-10-29 thomas send_client_info(struct gotd_imsgev *iev, struct gotd_client *client)
501 c902213d 2022-10-29 thomas const struct got_error *err = NULL;
502 c902213d 2022-10-29 thomas struct gotd_imsg_info_client iclient;
503 c902213d 2022-10-29 thomas struct gotd_child_proc *proc;
504 c902213d 2022-10-29 thomas size_t i;
506 c902213d 2022-10-29 thomas memset(&iclient, 0, sizeof(iclient));
507 c902213d 2022-10-29 thomas iclient.euid = client->euid;
508 c902213d 2022-10-29 thomas iclient.egid = client->egid;
510 c902213d 2022-10-29 thomas proc = get_client_proc(client);
511 c902213d 2022-10-29 thomas if (proc) {
512 414e37cb 2022-12-30 thomas if (strlcpy(iclient.repo_name, proc->repo_path,
513 c902213d 2022-10-29 thomas sizeof(iclient.repo_name)) >= sizeof(iclient.repo_name)) {
514 c902213d 2022-10-29 thomas return got_error_msg(GOT_ERR_NO_SPACE,
515 c902213d 2022-10-29 thomas "repo name too long");
517 c902213d 2022-10-29 thomas if (client_is_writing(client))
518 c902213d 2022-10-29 thomas iclient.is_writing = 1;
521 c902213d 2022-10-29 thomas iclient.state = client->state;
522 c902213d 2022-10-29 thomas iclient.ncapabilities = client->ncapabilities;
524 c902213d 2022-10-29 thomas if (gotd_imsg_compose_event(iev, GOTD_IMSG_INFO_CLIENT, PROC_GOTD, -1,
525 c902213d 2022-10-29 thomas &iclient, sizeof(iclient)) == -1) {
526 c902213d 2022-10-29 thomas err = got_error_from_errno("imsg compose INFO_CLIENT");
528 c902213d 2022-10-29 thomas return err;
531 c902213d 2022-10-29 thomas for (i = 0; i < client->ncapabilities; i++) {
532 c902213d 2022-10-29 thomas struct gotd_client_capability *capa;
533 c902213d 2022-10-29 thomas capa = &client->capabilities[i];
534 c902213d 2022-10-29 thomas err = send_capability(capa, iev);
536 c902213d 2022-10-29 thomas return err;
539 c902213d 2022-10-29 thomas return NULL;
542 c902213d 2022-10-29 thomas static const struct got_error *
543 c902213d 2022-10-29 thomas send_info(struct gotd_client *client)
545 c902213d 2022-10-29 thomas const struct got_error *err = NULL;
546 c902213d 2022-10-29 thomas struct gotd_imsg_info info;
547 c902213d 2022-10-29 thomas uint64_t slot;
548 c902213d 2022-10-29 thomas struct gotd_repo *repo;
550 c902213d 2022-10-29 thomas info.pid = gotd.pid;
551 c902213d 2022-10-29 thomas info.verbosity = gotd.verbosity;
552 c902213d 2022-10-29 thomas info.nrepos = gotd.nrepos;
553 c902213d 2022-10-29 thomas info.nclients = client_cnt - 1;
555 c902213d 2022-10-29 thomas if (gotd_imsg_compose_event(&client->iev, GOTD_IMSG_INFO, PROC_GOTD, -1,
556 c902213d 2022-10-29 thomas &info, sizeof(info)) == -1) {
557 c902213d 2022-10-29 thomas err = got_error_from_errno("imsg compose INFO");
559 c902213d 2022-10-29 thomas return err;
562 c902213d 2022-10-29 thomas TAILQ_FOREACH(repo, &gotd.repos, entry) {
563 c902213d 2022-10-29 thomas err = send_repo_info(&client->iev, repo);
565 c902213d 2022-10-29 thomas return err;
568 c902213d 2022-10-29 thomas for (slot = 0; slot < nitems(gotd_clients); slot++) {
569 c902213d 2022-10-29 thomas struct gotd_client *c;
570 c902213d 2022-10-29 thomas STAILQ_FOREACH(c, &gotd_clients[slot], entry) {
571 c902213d 2022-10-29 thomas if (c->id == client->id)
572 c902213d 2022-10-29 thomas continue;
573 c902213d 2022-10-29 thomas err = send_client_info(&client->iev, c);
575 c902213d 2022-10-29 thomas return err;
579 c902213d 2022-10-29 thomas return NULL;
582 c902213d 2022-10-29 thomas static const struct got_error *
583 c902213d 2022-10-29 thomas stop_gotd(struct gotd_client *client)
586 c902213d 2022-10-29 thomas if (client->euid != 0)
587 c902213d 2022-10-29 thomas return got_error_set_errno(EPERM, "stop");
589 c902213d 2022-10-29 thomas gotd_shutdown();
590 c902213d 2022-10-29 thomas /* NOTREACHED */
591 729a7e24 2022-11-17 thomas return NULL;
594 729a7e24 2022-11-17 thomas static struct gotd_repo *
595 729a7e24 2022-11-17 thomas find_repo_by_name(const char *repo_name)
597 729a7e24 2022-11-17 thomas struct gotd_repo *repo;
598 729a7e24 2022-11-17 thomas size_t namelen;
600 729a7e24 2022-11-17 thomas TAILQ_FOREACH(repo, &gotd.repos, entry) {
601 729a7e24 2022-11-17 thomas namelen = strlen(repo->name);
602 729a7e24 2022-11-17 thomas if (strncmp(repo->name, repo_name, namelen) != 0)
603 729a7e24 2022-11-17 thomas continue;
604 729a7e24 2022-11-17 thomas if (repo_name[namelen] == '\0' ||
605 729a7e24 2022-11-17 thomas strcmp(&repo_name[namelen], ".git") == 0)
606 729a7e24 2022-11-17 thomas return repo;
609 3efd8e31 2022-10-23 thomas return NULL;
612 3efd8e31 2022-10-23 thomas static const struct got_error *
613 85b37c72 2022-12-30 thomas start_client_session(struct gotd_client *client, struct imsg *imsg)
615 3efd8e31 2022-10-23 thomas const struct got_error *err;
616 3efd8e31 2022-10-23 thomas struct gotd_imsg_list_refs ireq;
617 729a7e24 2022-11-17 thomas struct gotd_repo *repo = NULL;
618 3efd8e31 2022-10-23 thomas size_t datalen;
620 3efd8e31 2022-10-23 thomas log_debug("list-refs request from uid %d", client->euid);
622 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
623 3efd8e31 2022-10-23 thomas if (datalen != sizeof(ireq))
624 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
626 3efd8e31 2022-10-23 thomas memcpy(&ireq, imsg->data, datalen);
628 3efd8e31 2022-10-23 thomas if (ireq.client_is_reading) {
629 3efd8e31 2022-10-23 thomas err = ensure_client_is_not_writing(client);
631 3efd8e31 2022-10-23 thomas return err;
632 729a7e24 2022-11-17 thomas repo = find_repo_by_name(ireq.repo_name);
633 729a7e24 2022-11-17 thomas if (repo == NULL)
634 729a7e24 2022-11-17 thomas return got_error(GOT_ERR_NOT_GIT_REPO);
635 c669c489 2022-12-30 thomas err = start_auth_child(client, GOTD_AUTH_READ, repo,
636 85b37c72 2022-12-30 thomas gotd.argv0, gotd.confpath, gotd.daemonize,
637 85b37c72 2022-12-30 thomas gotd.verbosity);
639 85b37c72 2022-12-30 thomas return err;
641 3efd8e31 2022-10-23 thomas err = ensure_client_is_not_reading(client);
643 729a7e24 2022-11-17 thomas return err;
644 729a7e24 2022-11-17 thomas repo = find_repo_by_name(ireq.repo_name);
645 729a7e24 2022-11-17 thomas if (repo == NULL)
646 729a7e24 2022-11-17 thomas return got_error(GOT_ERR_NOT_GIT_REPO);
647 c669c489 2022-12-30 thomas err = start_auth_child(client,
648 c669c489 2022-12-30 thomas GOTD_AUTH_READ | GOTD_AUTH_WRITE,
649 c669c489 2022-12-30 thomas repo, gotd.argv0, gotd.confpath, gotd.daemonize,
650 85b37c72 2022-12-30 thomas gotd.verbosity);
652 85b37c72 2022-12-30 thomas return err;
655 c669c489 2022-12-30 thomas /* Flow continues upon authentication successs/failure or timeout. */
656 3efd8e31 2022-10-23 thomas return NULL;
659 3efd8e31 2022-10-23 thomas static const struct got_error *
660 3efd8e31 2022-10-23 thomas forward_want(struct gotd_client *client, struct imsg *imsg)
662 3efd8e31 2022-10-23 thomas struct gotd_imsg_want ireq;
663 3efd8e31 2022-10-23 thomas struct gotd_imsg_want iwant;
664 3efd8e31 2022-10-23 thomas size_t datalen;
666 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
667 3efd8e31 2022-10-23 thomas if (datalen != sizeof(ireq))
668 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
670 3efd8e31 2022-10-23 thomas memcpy(&ireq, imsg->data, datalen);
672 3efd8e31 2022-10-23 thomas memset(&iwant, 0, sizeof(iwant));
673 3efd8e31 2022-10-23 thomas memcpy(iwant.object_id, ireq.object_id, SHA1_DIGEST_LENGTH);
674 3efd8e31 2022-10-23 thomas iwant.client_id = client->id;
676 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_read->iev, GOTD_IMSG_WANT,
677 3efd8e31 2022-10-23 thomas PROC_GOTD, -1, &iwant, sizeof(iwant)) == -1)
678 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg compose WANT");
680 3efd8e31 2022-10-23 thomas return NULL;
683 3efd8e31 2022-10-23 thomas static const struct got_error *
684 3efd8e31 2022-10-23 thomas forward_ref_update(struct gotd_client *client, struct imsg *imsg)
686 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
687 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update ireq;
688 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update *iref = NULL;
689 3efd8e31 2022-10-23 thomas size_t datalen;
691 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
692 3efd8e31 2022-10-23 thomas if (datalen < sizeof(ireq))
693 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
694 3efd8e31 2022-10-23 thomas memcpy(&ireq, imsg->data, sizeof(ireq));
695 3efd8e31 2022-10-23 thomas if (datalen != sizeof(ireq) + ireq.name_len)
696 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
698 3efd8e31 2022-10-23 thomas iref = malloc(datalen);
699 3efd8e31 2022-10-23 thomas if (iref == NULL)
700 3efd8e31 2022-10-23 thomas return got_error_from_errno("malloc");
701 3efd8e31 2022-10-23 thomas memcpy(iref, imsg->data, datalen);
703 3efd8e31 2022-10-23 thomas iref->client_id = client->id;
704 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_write->iev,
705 3efd8e31 2022-10-23 thomas GOTD_IMSG_REF_UPDATE, PROC_GOTD, -1, iref, datalen) == -1)
706 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg compose REF_UPDATE");
707 3efd8e31 2022-10-23 thomas free(iref);
708 3efd8e31 2022-10-23 thomas return err;
711 3efd8e31 2022-10-23 thomas static const struct got_error *
712 3efd8e31 2022-10-23 thomas forward_have(struct gotd_client *client, struct imsg *imsg)
714 3efd8e31 2022-10-23 thomas struct gotd_imsg_have ireq;
715 3efd8e31 2022-10-23 thomas struct gotd_imsg_have ihave;
716 3efd8e31 2022-10-23 thomas size_t datalen;
718 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
719 3efd8e31 2022-10-23 thomas if (datalen != sizeof(ireq))
720 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
722 3efd8e31 2022-10-23 thomas memcpy(&ireq, imsg->data, datalen);
724 3efd8e31 2022-10-23 thomas memset(&ihave, 0, sizeof(ihave));
725 3efd8e31 2022-10-23 thomas memcpy(ihave.object_id, ireq.object_id, SHA1_DIGEST_LENGTH);
726 3efd8e31 2022-10-23 thomas ihave.client_id = client->id;
728 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_read->iev, GOTD_IMSG_HAVE,
729 3efd8e31 2022-10-23 thomas PROC_GOTD, -1, &ihave, sizeof(ihave)) == -1)
730 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg compose HAVE");
732 3efd8e31 2022-10-23 thomas return NULL;
735 3efd8e31 2022-10-23 thomas static int
736 3efd8e31 2022-10-23 thomas client_has_capability(struct gotd_client *client, const char *capastr)
738 3efd8e31 2022-10-23 thomas struct gotd_client_capability *capa;
739 3efd8e31 2022-10-23 thomas size_t i;
741 3efd8e31 2022-10-23 thomas if (client->ncapabilities == 0)
742 3efd8e31 2022-10-23 thomas return 0;
744 3efd8e31 2022-10-23 thomas for (i = 0; i < client->ncapabilities; i++) {
745 3efd8e31 2022-10-23 thomas capa = &client->capabilities[i];
746 3efd8e31 2022-10-23 thomas if (strcmp(capa->key, capastr) == 0)
747 3efd8e31 2022-10-23 thomas return 1;
750 3efd8e31 2022-10-23 thomas return 0;
753 3efd8e31 2022-10-23 thomas static const struct got_error *
754 3efd8e31 2022-10-23 thomas recv_capabilities(struct gotd_client *client, struct imsg *imsg)
756 3efd8e31 2022-10-23 thomas struct gotd_imsg_capabilities icapas;
757 3efd8e31 2022-10-23 thomas size_t datalen;
759 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
760 3efd8e31 2022-10-23 thomas if (datalen != sizeof(icapas))
761 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
762 3efd8e31 2022-10-23 thomas memcpy(&icapas, imsg->data, sizeof(icapas));
764 3efd8e31 2022-10-23 thomas client->ncapa_alloc = icapas.ncapabilities;
765 3efd8e31 2022-10-23 thomas client->capabilities = calloc(client->ncapa_alloc,
766 3efd8e31 2022-10-23 thomas sizeof(*client->capabilities));
767 3efd8e31 2022-10-23 thomas if (client->capabilities == NULL) {
768 3efd8e31 2022-10-23 thomas client->ncapa_alloc = 0;
769 3efd8e31 2022-10-23 thomas return got_error_from_errno("calloc");
772 3efd8e31 2022-10-23 thomas log_debug("expecting %zu capabilities from uid %d",
773 3efd8e31 2022-10-23 thomas client->ncapa_alloc, client->euid);
774 3efd8e31 2022-10-23 thomas return NULL;
777 3efd8e31 2022-10-23 thomas static const struct got_error *
778 3efd8e31 2022-10-23 thomas recv_capability(struct gotd_client *client, struct imsg *imsg)
780 3efd8e31 2022-10-23 thomas struct gotd_imsg_capability icapa;
781 3efd8e31 2022-10-23 thomas struct gotd_client_capability *capa;
782 3efd8e31 2022-10-23 thomas size_t datalen;
783 3efd8e31 2022-10-23 thomas char *key, *value = NULL;
785 3efd8e31 2022-10-23 thomas if (client->capabilities == NULL ||
786 3efd8e31 2022-10-23 thomas client->ncapabilities >= client->ncapa_alloc) {
787 3efd8e31 2022-10-23 thomas return got_error_msg(GOT_ERR_BAD_REQUEST,
788 3efd8e31 2022-10-23 thomas "unexpected capability received");
791 3efd8e31 2022-10-23 thomas memset(&icapa, 0, sizeof(icapa));
793 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
794 3efd8e31 2022-10-23 thomas if (datalen < sizeof(icapa))
795 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
796 3efd8e31 2022-10-23 thomas memcpy(&icapa, imsg->data, sizeof(icapa));
798 3efd8e31 2022-10-23 thomas if (datalen != sizeof(icapa) + icapa.key_len + icapa.value_len)
799 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
801 3efd8e31 2022-10-23 thomas key = malloc(icapa.key_len + 1);
802 3efd8e31 2022-10-23 thomas if (key == NULL)
803 3efd8e31 2022-10-23 thomas return got_error_from_errno("malloc");
804 3efd8e31 2022-10-23 thomas if (icapa.value_len > 0) {
805 3efd8e31 2022-10-23 thomas value = malloc(icapa.value_len + 1);
806 3efd8e31 2022-10-23 thomas if (value == NULL) {
807 3efd8e31 2022-10-23 thomas free(key);
808 3efd8e31 2022-10-23 thomas return got_error_from_errno("malloc");
812 3efd8e31 2022-10-23 thomas memcpy(key, imsg->data + sizeof(icapa), icapa.key_len);
813 3efd8e31 2022-10-23 thomas key[icapa.key_len] = '\0';
814 3efd8e31 2022-10-23 thomas if (value) {
815 3efd8e31 2022-10-23 thomas memcpy(value, imsg->data + sizeof(icapa) + icapa.key_len,
816 3efd8e31 2022-10-23 thomas icapa.value_len);
817 3efd8e31 2022-10-23 thomas value[icapa.value_len] = '\0';
820 3efd8e31 2022-10-23 thomas capa = &client->capabilities[client->ncapabilities++];
821 3efd8e31 2022-10-23 thomas capa->key = key;
822 3efd8e31 2022-10-23 thomas capa->value = value;
824 3efd8e31 2022-10-23 thomas if (value)
825 3efd8e31 2022-10-23 thomas log_debug("uid %d: capability %s=%s", client->euid, key, value);
827 3efd8e31 2022-10-23 thomas log_debug("uid %d: capability %s", client->euid, key);
829 3efd8e31 2022-10-23 thomas return NULL;
832 3efd8e31 2022-10-23 thomas static const struct got_error *
833 3efd8e31 2022-10-23 thomas send_packfile(struct gotd_client *client)
835 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
836 3efd8e31 2022-10-23 thomas struct gotd_imsg_send_packfile ipack;
837 3efd8e31 2022-10-23 thomas struct gotd_imsg_packfile_pipe ipipe;
838 3efd8e31 2022-10-23 thomas int pipe[2];
840 3efd8e31 2022-10-23 thomas if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe) == -1)
841 3efd8e31 2022-10-23 thomas return got_error_from_errno("socketpair");
843 3efd8e31 2022-10-23 thomas memset(&ipack, 0, sizeof(ipack));
844 3efd8e31 2022-10-23 thomas memset(&ipipe, 0, sizeof(ipipe));
846 3efd8e31 2022-10-23 thomas ipack.client_id = client->id;
847 3efd8e31 2022-10-23 thomas if (client_has_capability(client, GOT_CAPA_SIDE_BAND_64K))
848 3efd8e31 2022-10-23 thomas ipack.report_progress = 1;
850 3efd8e31 2022-10-23 thomas client->delta_cache_fd = got_opentempfd();
851 3efd8e31 2022-10-23 thomas if (client->delta_cache_fd == -1)
852 3efd8e31 2022-10-23 thomas return got_error_from_errno("got_opentempfd");
854 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_read->iev,
855 3efd8e31 2022-10-23 thomas GOTD_IMSG_SEND_PACKFILE, PROC_GOTD, client->delta_cache_fd,
856 3efd8e31 2022-10-23 thomas &ipack, sizeof(ipack)) == -1) {
857 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg compose SEND_PACKFILE");
858 3efd8e31 2022-10-23 thomas close(pipe[0]);
859 3efd8e31 2022-10-23 thomas close(pipe[1]);
860 3efd8e31 2022-10-23 thomas return err;
863 3efd8e31 2022-10-23 thomas ipipe.client_id = client->id;
865 cc4cc677 2022-10-28 thomas /* Send pack pipe end 0 to repo_read. */
866 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_read->iev,
867 3efd8e31 2022-10-23 thomas GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD, pipe[0],
868 3efd8e31 2022-10-23 thomas &ipipe, sizeof(ipipe)) == -1) {
869 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg compose PACKFILE_PIPE");
870 3efd8e31 2022-10-23 thomas close(pipe[1]);
871 3efd8e31 2022-10-23 thomas return err;
874 cc4cc677 2022-10-28 thomas /* Send pack pipe end 1 to gotsh(1) (expects just an fd, no data). */
875 cc4cc677 2022-10-28 thomas if (gotd_imsg_compose_event(&client->iev,
876 cc4cc677 2022-10-28 thomas GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD, pipe[1], NULL, 0) == -1)
877 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg compose PACKFILE_PIPE");
879 3efd8e31 2022-10-23 thomas return err;
882 3efd8e31 2022-10-23 thomas static const struct got_error *
883 3efd8e31 2022-10-23 thomas recv_packfile(struct gotd_client *client)
885 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
886 3efd8e31 2022-10-23 thomas struct gotd_imsg_recv_packfile ipack;
887 3efd8e31 2022-10-23 thomas struct gotd_imsg_packfile_pipe ipipe;
888 3efd8e31 2022-10-23 thomas struct gotd_imsg_packidx_file ifile;
889 3efd8e31 2022-10-23 thomas char *basepath = NULL, *pack_path = NULL, *idx_path = NULL;
890 3efd8e31 2022-10-23 thomas int packfd = -1, idxfd = -1;
891 3efd8e31 2022-10-23 thomas int pipe[2] = { -1, -1 };
893 3efd8e31 2022-10-23 thomas if (client->packfile_path) {
894 3efd8e31 2022-10-23 thomas return got_error_fmt(GOT_ERR_PRIVSEP_MSG,
895 3efd8e31 2022-10-23 thomas "uid %d already has a pack file", client->euid);
898 3efd8e31 2022-10-23 thomas if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe) == -1)
899 3efd8e31 2022-10-23 thomas return got_error_from_errno("socketpair");
901 3efd8e31 2022-10-23 thomas memset(&ipipe, 0, sizeof(ipipe));
902 3efd8e31 2022-10-23 thomas ipipe.client_id = client->id;
904 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_write->iev,
905 3efd8e31 2022-10-23 thomas GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD, pipe[0],
906 3efd8e31 2022-10-23 thomas &ipipe, sizeof(ipipe)) == -1) {
907 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg compose PACKFILE_PIPE");
908 3efd8e31 2022-10-23 thomas pipe[0] = -1;
909 3efd8e31 2022-10-23 thomas goto done;
911 3efd8e31 2022-10-23 thomas pipe[0] = -1;
913 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_write->iev,
914 3efd8e31 2022-10-23 thomas GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD, pipe[1],
915 3efd8e31 2022-10-23 thomas &ipipe, sizeof(ipipe)) == -1)
916 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg compose PACKFILE_PIPE");
917 3efd8e31 2022-10-23 thomas pipe[1] = -1;
919 3efd8e31 2022-10-23 thomas if (asprintf(&basepath, "%s/%s/receiving-from-uid-%d.pack",
920 414e37cb 2022-12-30 thomas client->repo_write->repo_path, GOT_OBJECTS_PACK_DIR,
921 3efd8e31 2022-10-23 thomas client->euid) == -1) {
922 3efd8e31 2022-10-23 thomas err = got_error_from_errno("asprintf");
923 3efd8e31 2022-10-23 thomas goto done;
926 fc2a50f2 2022-11-01 thomas err = got_opentemp_named_fd(&pack_path, &packfd, basepath, "");
928 3efd8e31 2022-10-23 thomas goto done;
930 3efd8e31 2022-10-23 thomas free(basepath);
931 3efd8e31 2022-10-23 thomas if (asprintf(&basepath, "%s/%s/receiving-from-uid-%d.idx",
932 414e37cb 2022-12-30 thomas client->repo_write->repo_path, GOT_OBJECTS_PACK_DIR,
933 3efd8e31 2022-10-23 thomas client->euid) == -1) {
934 3efd8e31 2022-10-23 thomas err = got_error_from_errno("asprintf");
935 3efd8e31 2022-10-23 thomas basepath = NULL;
936 3efd8e31 2022-10-23 thomas goto done;
938 fc2a50f2 2022-11-01 thomas err = got_opentemp_named_fd(&idx_path, &idxfd, basepath, "");
940 3efd8e31 2022-10-23 thomas goto done;
942 3efd8e31 2022-10-23 thomas memset(&ifile, 0, sizeof(ifile));
943 3efd8e31 2022-10-23 thomas ifile.client_id = client->id;
944 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_write->iev,
945 3efd8e31 2022-10-23 thomas GOTD_IMSG_PACKIDX_FILE, PROC_GOTD, idxfd,
946 3efd8e31 2022-10-23 thomas &ifile, sizeof(ifile)) == -1) {
947 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg compose PACKIDX_FILE");
948 3efd8e31 2022-10-23 thomas idxfd = -1;
949 3efd8e31 2022-10-23 thomas goto done;
951 3efd8e31 2022-10-23 thomas idxfd = -1;
953 3efd8e31 2022-10-23 thomas memset(&ipack, 0, sizeof(ipack));
954 3efd8e31 2022-10-23 thomas ipack.client_id = client->id;
955 3efd8e31 2022-10-23 thomas if (client_has_capability(client, GOT_CAPA_REPORT_STATUS))
956 3efd8e31 2022-10-23 thomas ipack.report_status = 1;
958 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_write->iev,
959 3efd8e31 2022-10-23 thomas GOTD_IMSG_RECV_PACKFILE, PROC_GOTD, packfd,
960 3efd8e31 2022-10-23 thomas &ipack, sizeof(ipack)) == -1) {
961 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg compose RECV_PACKFILE");
962 3efd8e31 2022-10-23 thomas packfd = -1;
963 3efd8e31 2022-10-23 thomas goto done;
965 3efd8e31 2022-10-23 thomas packfd = -1;
968 3efd8e31 2022-10-23 thomas free(basepath);
969 3efd8e31 2022-10-23 thomas if (pipe[0] != -1 && close(pipe[0]) == -1 && err == NULL)
970 3efd8e31 2022-10-23 thomas err = got_error_from_errno("close");
971 3efd8e31 2022-10-23 thomas if (pipe[1] != -1 && close(pipe[1]) == -1 && err == NULL)
972 3efd8e31 2022-10-23 thomas err = got_error_from_errno("close");
973 3efd8e31 2022-10-23 thomas if (packfd != -1 && close(packfd) == -1 && err == NULL)
974 3efd8e31 2022-10-23 thomas err = got_error_from_errno("close");
975 3efd8e31 2022-10-23 thomas if (idxfd != -1 && close(idxfd) == -1 && err == NULL)
976 3efd8e31 2022-10-23 thomas err = got_error_from_errno("close");
977 3efd8e31 2022-10-23 thomas if (err) {
978 3efd8e31 2022-10-23 thomas free(pack_path);
979 3efd8e31 2022-10-23 thomas free(idx_path);
981 3efd8e31 2022-10-23 thomas client->packfile_path = pack_path;
982 3efd8e31 2022-10-23 thomas client->packidx_path = idx_path;
984 3efd8e31 2022-10-23 thomas return err;
987 3efd8e31 2022-10-23 thomas static void
988 3efd8e31 2022-10-23 thomas gotd_request(int fd, short events, void *arg)
990 3efd8e31 2022-10-23 thomas struct gotd_imsgev *iev = arg;
991 3efd8e31 2022-10-23 thomas struct imsgbuf *ibuf = &iev->ibuf;
992 3efd8e31 2022-10-23 thomas struct gotd_client *client = iev->handler_arg;
993 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
994 3efd8e31 2022-10-23 thomas struct imsg imsg;
995 3efd8e31 2022-10-23 thomas ssize_t n;
997 3efd8e31 2022-10-23 thomas if (events & EV_WRITE) {
998 3efd8e31 2022-10-23 thomas while (ibuf->w.queued) {
999 3efd8e31 2022-10-23 thomas n = msgbuf_write(&ibuf->w);
1000 3efd8e31 2022-10-23 thomas if (n == -1 && errno == EPIPE) {
1002 3efd8e31 2022-10-23 thomas * The client has closed its socket.
1003 3efd8e31 2022-10-23 thomas * This can happen when Git clients are
1004 3efd8e31 2022-10-23 thomas * done sending pack file data.
1006 3efd8e31 2022-10-23 thomas msgbuf_clear(&ibuf->w);
1007 3efd8e31 2022-10-23 thomas continue;
1008 3efd8e31 2022-10-23 thomas } else if (n == -1 && errno != EAGAIN) {
1009 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg_flush");
1010 3efd8e31 2022-10-23 thomas disconnect_on_error(client, err);
1013 3efd8e31 2022-10-23 thomas if (n == 0) {
1014 3efd8e31 2022-10-23 thomas /* Connection closed. */
1015 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_EOF);
1016 3efd8e31 2022-10-23 thomas disconnect_on_error(client, err);
1021 c902213d 2022-10-29 thomas /* Disconnect gotctl(8) now that messages have been sent. */
1022 c902213d 2022-10-29 thomas if (!client_is_reading(client) && !client_is_writing(client)) {
1023 c902213d 2022-10-29 thomas disconnect(client);
1028 3efd8e31 2022-10-23 thomas if ((events & EV_READ) == 0)
1031 3efd8e31 2022-10-23 thomas memset(&imsg, 0, sizeof(imsg));
1033 3efd8e31 2022-10-23 thomas while (err == NULL) {
1034 3efd8e31 2022-10-23 thomas err = gotd_imsg_recv(&imsg, ibuf, 0);
1035 3efd8e31 2022-10-23 thomas if (err) {
1036 3efd8e31 2022-10-23 thomas if (err->code == GOT_ERR_PRIVSEP_READ)
1037 3efd8e31 2022-10-23 thomas err = NULL;
1041 3efd8e31 2022-10-23 thomas evtimer_del(&client->tmo);
1043 3efd8e31 2022-10-23 thomas switch (imsg.hdr.type) {
1044 c902213d 2022-10-29 thomas case GOTD_IMSG_INFO:
1045 c902213d 2022-10-29 thomas err = send_info(client);
1047 c902213d 2022-10-29 thomas case GOTD_IMSG_STOP:
1048 c902213d 2022-10-29 thomas err = stop_gotd(client);
1050 3efd8e31 2022-10-23 thomas case GOTD_IMSG_LIST_REFS:
1051 3efd8e31 2022-10-23 thomas if (client->state != GOTD_STATE_EXPECT_LIST_REFS) {
1052 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1053 3efd8e31 2022-10-23 thomas "unexpected list-refs request received");
1056 85b37c72 2022-12-30 thomas err = start_client_session(client, &imsg);
1057 3efd8e31 2022-10-23 thomas if (err)
1060 3efd8e31 2022-10-23 thomas case GOTD_IMSG_CAPABILITIES:
1061 3efd8e31 2022-10-23 thomas if (client->state != GOTD_STATE_EXPECT_CAPABILITIES) {
1062 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1063 3efd8e31 2022-10-23 thomas "unexpected capabilities received");
1066 3efd8e31 2022-10-23 thomas log_debug("receiving capabilities from uid %d",
1067 3efd8e31 2022-10-23 thomas client->euid);
1068 3efd8e31 2022-10-23 thomas err = recv_capabilities(client, &imsg);
1070 3efd8e31 2022-10-23 thomas case GOTD_IMSG_CAPABILITY:
1071 3efd8e31 2022-10-23 thomas if (client->state != GOTD_STATE_EXPECT_CAPABILITIES) {
1072 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1073 3efd8e31 2022-10-23 thomas "unexpected capability received");
1076 3efd8e31 2022-10-23 thomas err = recv_capability(client, &imsg);
1077 3efd8e31 2022-10-23 thomas if (err || client->ncapabilities < client->ncapa_alloc)
1079 3efd8e31 2022-10-23 thomas if (client_is_reading(client)) {
1080 3efd8e31 2022-10-23 thomas client->state = GOTD_STATE_EXPECT_WANT;
1081 3efd8e31 2022-10-23 thomas log_debug("uid %d: expecting want-lines",
1082 3efd8e31 2022-10-23 thomas client->euid);
1083 3efd8e31 2022-10-23 thomas } else if (client_is_writing(client)) {
1084 3efd8e31 2022-10-23 thomas client->state = GOTD_STATE_EXPECT_REF_UPDATE;
1085 3efd8e31 2022-10-23 thomas log_debug("uid %d: expecting ref-update-lines",
1086 3efd8e31 2022-10-23 thomas client->euid);
1088 3efd8e31 2022-10-23 thomas fatalx("client %d is both reading and writing",
1089 3efd8e31 2022-10-23 thomas client->euid);
1091 3efd8e31 2022-10-23 thomas case GOTD_IMSG_WANT:
1092 3efd8e31 2022-10-23 thomas if (client->state != GOTD_STATE_EXPECT_WANT) {
1093 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1094 3efd8e31 2022-10-23 thomas "unexpected want-line received");
1097 3efd8e31 2022-10-23 thomas log_debug("received want-line from uid %d",
1098 3efd8e31 2022-10-23 thomas client->euid);
1099 3efd8e31 2022-10-23 thomas err = ensure_client_is_reading(client);
1100 3efd8e31 2022-10-23 thomas if (err)
1102 3efd8e31 2022-10-23 thomas err = forward_want(client, &imsg);
1104 3efd8e31 2022-10-23 thomas case GOTD_IMSG_REF_UPDATE:
1105 3efd8e31 2022-10-23 thomas if (client->state != GOTD_STATE_EXPECT_REF_UPDATE) {
1106 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1107 3efd8e31 2022-10-23 thomas "unexpected ref-update-line received");
1110 3efd8e31 2022-10-23 thomas log_debug("received ref-update-line from uid %d",
1111 3efd8e31 2022-10-23 thomas client->euid);
1112 3efd8e31 2022-10-23 thomas err = ensure_client_is_writing(client);
1113 3efd8e31 2022-10-23 thomas if (err)
1115 3efd8e31 2022-10-23 thomas err = forward_ref_update(client, &imsg);
1116 3efd8e31 2022-10-23 thomas if (err)
1118 3efd8e31 2022-10-23 thomas client->state = GOTD_STATE_EXPECT_MORE_REF_UPDATES;
1120 3efd8e31 2022-10-23 thomas case GOTD_IMSG_HAVE:
1121 3efd8e31 2022-10-23 thomas if (client->state != GOTD_STATE_EXPECT_HAVE) {
1122 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1123 3efd8e31 2022-10-23 thomas "unexpected have-line received");
1126 3efd8e31 2022-10-23 thomas log_debug("received have-line from uid %d",
1127 3efd8e31 2022-10-23 thomas client->euid);
1128 3efd8e31 2022-10-23 thomas err = ensure_client_is_reading(client);
1129 3efd8e31 2022-10-23 thomas if (err)
1131 3efd8e31 2022-10-23 thomas err = forward_have(client, &imsg);
1132 3efd8e31 2022-10-23 thomas if (err)
1135 3efd8e31 2022-10-23 thomas case GOTD_IMSG_FLUSH:
1136 3efd8e31 2022-10-23 thomas if (client->state == GOTD_STATE_EXPECT_WANT ||
1137 3efd8e31 2022-10-23 thomas client->state == GOTD_STATE_EXPECT_HAVE) {
1138 3efd8e31 2022-10-23 thomas err = ensure_client_is_reading(client);
1139 3efd8e31 2022-10-23 thomas if (err)
1141 3efd8e31 2022-10-23 thomas } else if (client->state ==
1142 3efd8e31 2022-10-23 thomas GOTD_STATE_EXPECT_MORE_REF_UPDATES) {
1143 3efd8e31 2022-10-23 thomas err = ensure_client_is_writing(client);
1144 3efd8e31 2022-10-23 thomas if (err)
1146 3efd8e31 2022-10-23 thomas } else {
1147 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1148 3efd8e31 2022-10-23 thomas "unexpected flush-pkt received");
1151 3efd8e31 2022-10-23 thomas log_debug("received flush-pkt from uid %d",
1152 3efd8e31 2022-10-23 thomas client->euid);
1153 3efd8e31 2022-10-23 thomas if (client->state == GOTD_STATE_EXPECT_WANT) {
1154 3efd8e31 2022-10-23 thomas client->state = GOTD_STATE_EXPECT_HAVE;
1155 3efd8e31 2022-10-23 thomas log_debug("uid %d: expecting have-lines",
1156 3efd8e31 2022-10-23 thomas client->euid);
1157 3efd8e31 2022-10-23 thomas } else if (client->state == GOTD_STATE_EXPECT_HAVE) {
1158 3efd8e31 2022-10-23 thomas client->state = GOTD_STATE_EXPECT_DONE;
1159 3efd8e31 2022-10-23 thomas log_debug("uid %d: expecting 'done'",
1160 3efd8e31 2022-10-23 thomas client->euid);
1161 3efd8e31 2022-10-23 thomas } else if (client->state ==
1162 3efd8e31 2022-10-23 thomas GOTD_STATE_EXPECT_MORE_REF_UPDATES) {
1163 3efd8e31 2022-10-23 thomas client->state = GOTD_STATE_EXPECT_PACKFILE;
1164 3efd8e31 2022-10-23 thomas log_debug("uid %d: expecting packfile",
1165 3efd8e31 2022-10-23 thomas client->euid);
1166 3efd8e31 2022-10-23 thomas err = recv_packfile(client);
1167 3efd8e31 2022-10-23 thomas } else {
1168 3efd8e31 2022-10-23 thomas /* should not happen, see above */
1169 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1170 3efd8e31 2022-10-23 thomas "unexpected client state");
1174 3efd8e31 2022-10-23 thomas case GOTD_IMSG_DONE:
1175 3efd8e31 2022-10-23 thomas if (client->state != GOTD_STATE_EXPECT_HAVE &&
1176 3efd8e31 2022-10-23 thomas client->state != GOTD_STATE_EXPECT_DONE) {
1177 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
1178 3efd8e31 2022-10-23 thomas "unexpected flush-pkt received");
1181 3efd8e31 2022-10-23 thomas log_debug("received 'done' from uid %d", client->euid);
1182 3efd8e31 2022-10-23 thomas err = ensure_client_is_reading(client);
1183 3efd8e31 2022-10-23 thomas if (err)
1185 3efd8e31 2022-10-23 thomas client->state = GOTD_STATE_DONE;
1186 3efd8e31 2022-10-23 thomas err = send_packfile(client);
1188 3efd8e31 2022-10-23 thomas default:
1189 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_MSG);
1193 3efd8e31 2022-10-23 thomas imsg_free(&imsg);
1196 3efd8e31 2022-10-23 thomas if (err) {
1197 3efd8e31 2022-10-23 thomas if (err->code != GOT_ERR_EOF ||
1198 3efd8e31 2022-10-23 thomas client->state != GOTD_STATE_EXPECT_PACKFILE)
1199 3efd8e31 2022-10-23 thomas disconnect_on_error(client, err);
1200 3efd8e31 2022-10-23 thomas } else {
1201 3efd8e31 2022-10-23 thomas gotd_imsg_event_add(&client->iev);
1202 3efd8e31 2022-10-23 thomas evtimer_add(&client->tmo, &timeout);
1206 3efd8e31 2022-10-23 thomas static void
1207 3efd8e31 2022-10-23 thomas gotd_request_timeout(int fd, short events, void *arg)
1209 3efd8e31 2022-10-23 thomas struct gotd_client *client = arg;
1211 3efd8e31 2022-10-23 thomas log_debug("disconnecting uid %d due to timeout", client->euid);
1212 3efd8e31 2022-10-23 thomas disconnect(client);
1215 2b3d32a1 2022-12-30 thomas static const struct got_error *
1216 2b3d32a1 2022-12-30 thomas recv_connect(uint32_t *client_id, struct imsg *imsg)
1218 2b3d32a1 2022-12-30 thomas const struct got_error *err = NULL;
1219 2b3d32a1 2022-12-30 thomas struct gotd_imsg_connect iconnect;
1220 2b3d32a1 2022-12-30 thomas size_t datalen;
1221 3efd8e31 2022-10-23 thomas int s = -1;
1222 3efd8e31 2022-10-23 thomas struct gotd_client *client = NULL;
1223 3efd8e31 2022-10-23 thomas uid_t euid;
1224 3efd8e31 2022-10-23 thomas gid_t egid;
1226 2b3d32a1 2022-12-30 thomas *client_id = 0;
1228 2b3d32a1 2022-12-30 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1229 2b3d32a1 2022-12-30 thomas if (datalen != sizeof(iconnect))
1230 2b3d32a1 2022-12-30 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1231 2b3d32a1 2022-12-30 thomas memcpy(&iconnect, imsg->data, sizeof(iconnect));
1233 2b3d32a1 2022-12-30 thomas s = imsg->fd;
1234 3efd8e31 2022-10-23 thomas if (s == -1) {
1235 2b3d32a1 2022-12-30 thomas err = got_error(GOT_ERR_PRIVSEP_NO_FD);
1236 2b3d32a1 2022-12-30 thomas goto done;
1239 2b3d32a1 2022-12-30 thomas if (find_client(iconnect.client_id)) {
1240 2b3d32a1 2022-12-30 thomas err = got_error_msg(GOT_ERR_CLIENT_ID, "duplicate client ID");
1241 2b3d32a1 2022-12-30 thomas goto done;
1244 3efd8e31 2022-10-23 thomas if (getpeereid(s, &euid, &egid) == -1) {
1245 2b3d32a1 2022-12-30 thomas err = got_error_from_errno("getpeerid");
1246 2b3d32a1 2022-12-30 thomas goto done;
1249 3efd8e31 2022-10-23 thomas client = calloc(1, sizeof(*client));
1250 3efd8e31 2022-10-23 thomas if (client == NULL) {
1251 2b3d32a1 2022-12-30 thomas err = got_error_from_errno("calloc");
1252 2b3d32a1 2022-12-30 thomas goto done;
1255 2b3d32a1 2022-12-30 thomas *client_id = iconnect.client_id;
1257 3efd8e31 2022-10-23 thomas client->state = GOTD_STATE_EXPECT_LIST_REFS;
1258 2b3d32a1 2022-12-30 thomas client->id = iconnect.client_id;
1259 3efd8e31 2022-10-23 thomas client->fd = s;
1261 3efd8e31 2022-10-23 thomas client->delta_cache_fd = -1;
1262 3efd8e31 2022-10-23 thomas client->euid = euid;
1263 3efd8e31 2022-10-23 thomas client->egid = egid;
1264 3efd8e31 2022-10-23 thomas client->nref_updates = -1;
1266 3efd8e31 2022-10-23 thomas imsg_init(&client->iev.ibuf, client->fd);
1267 3efd8e31 2022-10-23 thomas client->iev.handler = gotd_request;
1268 3efd8e31 2022-10-23 thomas client->iev.events = EV_READ;
1269 3efd8e31 2022-10-23 thomas client->iev.handler_arg = client;
1271 3efd8e31 2022-10-23 thomas event_set(&client->iev.ev, client->fd, EV_READ, gotd_request,
1272 3efd8e31 2022-10-23 thomas &client->iev);
1273 3efd8e31 2022-10-23 thomas gotd_imsg_event_add(&client->iev);
1275 3efd8e31 2022-10-23 thomas evtimer_set(&client->tmo, gotd_request_timeout, client);
1277 3efd8e31 2022-10-23 thomas add_client(client);
1278 3efd8e31 2022-10-23 thomas log_debug("%s: new client uid %d connected on fd %d", __func__,
1279 3efd8e31 2022-10-23 thomas client->euid, client->fd);
1281 2b3d32a1 2022-12-30 thomas if (err) {
1282 85b37c72 2022-12-30 thomas struct gotd_child_proc *listen_proc = &gotd.listen_proc;
1283 2b3d32a1 2022-12-30 thomas struct gotd_imsg_disconnect idisconnect;
1285 2b3d32a1 2022-12-30 thomas idisconnect.client_id = client->id;
1286 2b3d32a1 2022-12-30 thomas if (gotd_imsg_compose_event(&listen_proc->iev,
1287 2b3d32a1 2022-12-30 thomas GOTD_IMSG_DISCONNECT, PROC_GOTD, -1,
1288 2b3d32a1 2022-12-30 thomas &idisconnect, sizeof(idisconnect)) == -1)
1289 2b3d32a1 2022-12-30 thomas log_warn("imsg compose DISCONNECT");
1291 2b3d32a1 2022-12-30 thomas if (s != -1)
1292 2b3d32a1 2022-12-30 thomas close(s);
1295 2b3d32a1 2022-12-30 thomas return err;
1298 3efd8e31 2022-10-23 thomas static const char *gotd_proc_names[PROC_MAX] = {
1299 3efd8e31 2022-10-23 thomas "parent",
1300 2b3d32a1 2022-12-30 thomas "listen",
1302 3efd8e31 2022-10-23 thomas "repo_read",
1303 3efd8e31 2022-10-23 thomas "repo_write"
1306 3efd8e31 2022-10-23 thomas static void
1307 3efd8e31 2022-10-23 thomas kill_proc(struct gotd_child_proc *proc, int fatal)
1309 3efd8e31 2022-10-23 thomas if (fatal) {
1310 3efd8e31 2022-10-23 thomas log_warnx("sending SIGKILL to PID %d", proc->pid);
1311 3efd8e31 2022-10-23 thomas kill(proc->pid, SIGKILL);
1313 3efd8e31 2022-10-23 thomas kill(proc->pid, SIGTERM);
1316 3efd8e31 2022-10-23 thomas static void
1317 3efd8e31 2022-10-23 thomas gotd_shutdown(void)
1319 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc;
1320 85b37c72 2022-12-30 thomas uint64_t slot;
1322 85b37c72 2022-12-30 thomas for (slot = 0; slot < nitems(gotd_clients); slot++) {
1323 85b37c72 2022-12-30 thomas struct gotd_client *c, *tmp;
1325 85b37c72 2022-12-30 thomas STAILQ_FOREACH_SAFE(c, &gotd_clients[slot], entry, tmp)
1326 85b37c72 2022-12-30 thomas disconnect(c);
1329 85b37c72 2022-12-30 thomas proc = &gotd.listen_proc;
1330 85b37c72 2022-12-30 thomas msgbuf_clear(&proc->iev.ibuf.w);
1331 85b37c72 2022-12-30 thomas close(proc->iev.ibuf.fd);
1332 85b37c72 2022-12-30 thomas kill_proc(proc, 0);
1333 c669c489 2022-12-30 thomas wait_for_child(proc->pid);
1335 3efd8e31 2022-10-23 thomas log_info("terminating");
1336 3efd8e31 2022-10-23 thomas exit(0);
1340 3efd8e31 2022-10-23 thomas gotd_sighdlr(int sig, short event, void *arg)
1343 3efd8e31 2022-10-23 thomas * Normal signal handler rules don't apply because libevent
1344 3efd8e31 2022-10-23 thomas * decouples for us.
1347 3efd8e31 2022-10-23 thomas switch (sig) {
1348 3efd8e31 2022-10-23 thomas case SIGHUP:
1349 3efd8e31 2022-10-23 thomas log_info("%s: ignoring SIGHUP", __func__);
1351 3efd8e31 2022-10-23 thomas case SIGUSR1:
1352 3efd8e31 2022-10-23 thomas log_info("%s: ignoring SIGUSR1", __func__);
1354 3efd8e31 2022-10-23 thomas case SIGTERM:
1355 3efd8e31 2022-10-23 thomas case SIGINT:
1356 3efd8e31 2022-10-23 thomas gotd_shutdown();
1357 3efd8e31 2022-10-23 thomas log_warnx("gotd terminating");
1358 3efd8e31 2022-10-23 thomas exit(0);
1360 3efd8e31 2022-10-23 thomas default:
1361 3efd8e31 2022-10-23 thomas fatalx("unexpected signal");
1365 3efd8e31 2022-10-23 thomas static const struct got_error *
1366 3efd8e31 2022-10-23 thomas ensure_proc_is_reading(struct gotd_client *client,
1367 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc)
1369 3efd8e31 2022-10-23 thomas if (!client_is_reading(client)) {
1370 3efd8e31 2022-10-23 thomas kill_proc(proc, 1);
1371 3efd8e31 2022-10-23 thomas return got_error_fmt(GOT_ERR_BAD_PACKET,
1372 3efd8e31 2022-10-23 thomas "PID %d handled a read-request for uid %d but this "
1373 3efd8e31 2022-10-23 thomas "user is not reading from a repository", proc->pid,
1374 3efd8e31 2022-10-23 thomas client->euid);
1377 3efd8e31 2022-10-23 thomas return NULL;
1380 3efd8e31 2022-10-23 thomas static const struct got_error *
1381 3efd8e31 2022-10-23 thomas ensure_proc_is_writing(struct gotd_client *client,
1382 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc)
1384 3efd8e31 2022-10-23 thomas if (!client_is_writing(client)) {
1385 3efd8e31 2022-10-23 thomas kill_proc(proc, 1);
1386 3efd8e31 2022-10-23 thomas return got_error_fmt(GOT_ERR_BAD_PACKET,
1387 3efd8e31 2022-10-23 thomas "PID %d handled a write-request for uid %d but this "
1388 3efd8e31 2022-10-23 thomas "user is not writing to a repository", proc->pid,
1389 3efd8e31 2022-10-23 thomas client->euid);
1392 3efd8e31 2022-10-23 thomas return NULL;
1395 3efd8e31 2022-10-23 thomas static int
1396 3efd8e31 2022-10-23 thomas verify_imsg_src(struct gotd_client *client, struct gotd_child_proc *proc,
1397 3efd8e31 2022-10-23 thomas struct imsg *imsg)
1399 3efd8e31 2022-10-23 thomas const struct got_error *err;
1400 3efd8e31 2022-10-23 thomas struct gotd_child_proc *client_proc;
1401 3efd8e31 2022-10-23 thomas int ret = 0;
1403 2b3d32a1 2022-12-30 thomas if (proc->type == PROC_REPO_READ || proc->type == PROC_REPO_WRITE) {
1404 2b3d32a1 2022-12-30 thomas client_proc = get_client_proc(client);
1405 2b3d32a1 2022-12-30 thomas if (client_proc == NULL)
1406 2b3d32a1 2022-12-30 thomas fatalx("no process found for uid %d", client->euid);
1407 2b3d32a1 2022-12-30 thomas if (proc->pid != client_proc->pid) {
1408 2b3d32a1 2022-12-30 thomas kill_proc(proc, 1);
1409 2b3d32a1 2022-12-30 thomas log_warnx("received message from PID %d for uid %d, "
1410 2b3d32a1 2022-12-30 thomas "while PID %d is the process serving this user",
1411 2b3d32a1 2022-12-30 thomas proc->pid, client->euid, client_proc->pid);
1412 2b3d32a1 2022-12-30 thomas return 0;
1416 3efd8e31 2022-10-23 thomas switch (imsg->hdr.type) {
1417 3efd8e31 2022-10-23 thomas case GOTD_IMSG_ERROR:
1418 3efd8e31 2022-10-23 thomas ret = 1;
1420 2b3d32a1 2022-12-30 thomas case GOTD_IMSG_CONNECT:
1421 2b3d32a1 2022-12-30 thomas if (proc->type != PROC_LISTEN) {
1422 2b3d32a1 2022-12-30 thomas err = got_error_fmt(GOT_ERR_BAD_PACKET,
1423 2b3d32a1 2022-12-30 thomas "new connection for uid %d from PID %d "
1424 2b3d32a1 2022-12-30 thomas "which is not the listen process",
1425 c669c489 2022-12-30 thomas proc->pid, client->euid);
1427 c669c489 2022-12-30 thomas ret = 1;
1429 c669c489 2022-12-30 thomas case GOTD_IMSG_ACCESS_GRANTED:
1430 c669c489 2022-12-30 thomas if (proc->type != PROC_AUTH) {
1431 c669c489 2022-12-30 thomas err = got_error_fmt(GOT_ERR_BAD_PACKET,
1432 c669c489 2022-12-30 thomas "authentication of uid %d from PID %d "
1433 c669c489 2022-12-30 thomas "which is not the auth process",
1434 2b3d32a1 2022-12-30 thomas proc->pid, client->euid);
1436 2b3d32a1 2022-12-30 thomas ret = 1;
1438 85b37c72 2022-12-30 thomas case GOTD_IMSG_REPO_CHILD_READY:
1439 85b37c72 2022-12-30 thomas if (proc->type != PROC_REPO_READ &&
1440 85b37c72 2022-12-30 thomas proc->type != PROC_REPO_WRITE) {
1441 85b37c72 2022-12-30 thomas err = got_error_fmt(GOT_ERR_BAD_PACKET,
1442 85b37c72 2022-12-30 thomas "unexpected \"ready\" signal from PID %d",
1443 85b37c72 2022-12-30 thomas proc->pid);
1445 85b37c72 2022-12-30 thomas ret = 1;
1447 3efd8e31 2022-10-23 thomas case GOTD_IMSG_PACKFILE_DONE:
1448 3efd8e31 2022-10-23 thomas err = ensure_proc_is_reading(client, proc);
1449 3efd8e31 2022-10-23 thomas if (err)
1450 3efd8e31 2022-10-23 thomas log_warnx("uid %d: %s", client->euid, err->msg);
1452 3efd8e31 2022-10-23 thomas ret = 1;
1454 3efd8e31 2022-10-23 thomas case GOTD_IMSG_PACKFILE_INSTALL:
1455 3efd8e31 2022-10-23 thomas case GOTD_IMSG_REF_UPDATES_START:
1456 3efd8e31 2022-10-23 thomas case GOTD_IMSG_REF_UPDATE:
1457 3efd8e31 2022-10-23 thomas err = ensure_proc_is_writing(client, proc);
1458 3efd8e31 2022-10-23 thomas if (err)
1459 3efd8e31 2022-10-23 thomas log_warnx("uid %d: %s", client->euid, err->msg);
1461 3efd8e31 2022-10-23 thomas ret = 1;
1463 3efd8e31 2022-10-23 thomas default:
1464 3efd8e31 2022-10-23 thomas log_debug("%s: unexpected imsg %d", __func__, imsg->hdr.type);
1468 3efd8e31 2022-10-23 thomas return ret;
1471 3efd8e31 2022-10-23 thomas static const struct got_error *
1472 85b37c72 2022-12-30 thomas list_refs_request(struct gotd_client *client, struct gotd_imsgev *iev)
1474 85b37c72 2022-12-30 thomas static const struct got_error *err;
1475 85b37c72 2022-12-30 thomas struct gotd_imsg_list_refs_internal ilref;
1478 85b37c72 2022-12-30 thomas memset(&ilref, 0, sizeof(ilref));
1479 85b37c72 2022-12-30 thomas ilref.client_id = client->id;
1481 85b37c72 2022-12-30 thomas fd = dup(client->fd);
1482 85b37c72 2022-12-30 thomas if (fd == -1)
1483 85b37c72 2022-12-30 thomas return got_error_from_errno("dup");
1485 85b37c72 2022-12-30 thomas if (gotd_imsg_compose_event(iev, GOTD_IMSG_LIST_REFS_INTERNAL,
1486 85b37c72 2022-12-30 thomas PROC_GOTD, fd, &ilref, sizeof(ilref)) == -1) {
1487 85b37c72 2022-12-30 thomas err = got_error_from_errno("imsg compose WANT");
1488 85b37c72 2022-12-30 thomas close(fd);
1489 85b37c72 2022-12-30 thomas return err;
1492 85b37c72 2022-12-30 thomas client->state = GOTD_STATE_EXPECT_CAPABILITIES;
1493 85b37c72 2022-12-30 thomas log_debug("uid %d: expecting capabilities", client->euid);
1494 85b37c72 2022-12-30 thomas return NULL;
1497 85b37c72 2022-12-30 thomas static const struct got_error *
1498 3efd8e31 2022-10-23 thomas recv_packfile_done(uint32_t *client_id, struct imsg *imsg)
1500 3efd8e31 2022-10-23 thomas struct gotd_imsg_packfile_done idone;
1501 3efd8e31 2022-10-23 thomas size_t datalen;
1503 3efd8e31 2022-10-23 thomas log_debug("packfile-done received");
1505 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1506 3efd8e31 2022-10-23 thomas if (datalen != sizeof(idone))
1507 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1508 3efd8e31 2022-10-23 thomas memcpy(&idone, imsg->data, sizeof(idone));
1510 3efd8e31 2022-10-23 thomas *client_id = idone.client_id;
1511 3efd8e31 2022-10-23 thomas return NULL;
1514 3efd8e31 2022-10-23 thomas static const struct got_error *
1515 3efd8e31 2022-10-23 thomas recv_packfile_install(uint32_t *client_id, struct imsg *imsg)
1517 3efd8e31 2022-10-23 thomas struct gotd_imsg_packfile_install inst;
1518 3efd8e31 2022-10-23 thomas size_t datalen;
1520 3efd8e31 2022-10-23 thomas log_debug("packfile-install received");
1522 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1523 3efd8e31 2022-10-23 thomas if (datalen != sizeof(inst))
1524 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1525 3efd8e31 2022-10-23 thomas memcpy(&inst, imsg->data, sizeof(inst));
1527 3efd8e31 2022-10-23 thomas *client_id = inst.client_id;
1528 3efd8e31 2022-10-23 thomas return NULL;
1531 3efd8e31 2022-10-23 thomas static const struct got_error *
1532 3efd8e31 2022-10-23 thomas recv_ref_updates_start(uint32_t *client_id, struct imsg *imsg)
1534 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_updates_start istart;
1535 3efd8e31 2022-10-23 thomas size_t datalen;
1537 3efd8e31 2022-10-23 thomas log_debug("ref-updates-start received");
1539 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1540 3efd8e31 2022-10-23 thomas if (datalen != sizeof(istart))
1541 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1542 3efd8e31 2022-10-23 thomas memcpy(&istart, imsg->data, sizeof(istart));
1544 3efd8e31 2022-10-23 thomas *client_id = istart.client_id;
1545 3efd8e31 2022-10-23 thomas return NULL;
1548 3efd8e31 2022-10-23 thomas static const struct got_error *
1549 3efd8e31 2022-10-23 thomas recv_ref_update(uint32_t *client_id, struct imsg *imsg)
1551 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update iref;
1552 3efd8e31 2022-10-23 thomas size_t datalen;
1554 3efd8e31 2022-10-23 thomas log_debug("ref-update received");
1556 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1557 3efd8e31 2022-10-23 thomas if (datalen < sizeof(iref))
1558 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1559 3efd8e31 2022-10-23 thomas memcpy(&iref, imsg->data, sizeof(iref));
1561 3efd8e31 2022-10-23 thomas *client_id = iref.client_id;
1562 3efd8e31 2022-10-23 thomas return NULL;
1565 3efd8e31 2022-10-23 thomas static const struct got_error *
1566 3efd8e31 2022-10-23 thomas send_ref_update_ok(struct gotd_client *client,
1567 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update *iref, const char *refname)
1569 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update_ok iok;
1570 3efd8e31 2022-10-23 thomas struct ibuf *wbuf;
1571 3efd8e31 2022-10-23 thomas size_t len;
1573 3efd8e31 2022-10-23 thomas memset(&iok, 0, sizeof(iok));
1574 3efd8e31 2022-10-23 thomas iok.client_id = client->id;
1575 3efd8e31 2022-10-23 thomas memcpy(iok.old_id, iref->old_id, SHA1_DIGEST_LENGTH);
1576 3efd8e31 2022-10-23 thomas memcpy(iok.new_id, iref->new_id, SHA1_DIGEST_LENGTH);
1577 3efd8e31 2022-10-23 thomas iok.name_len = strlen(refname);
1579 3efd8e31 2022-10-23 thomas len = sizeof(iok) + iok.name_len;
1580 3efd8e31 2022-10-23 thomas wbuf = imsg_create(&client->iev.ibuf, GOTD_IMSG_REF_UPDATE_OK,
1581 3efd8e31 2022-10-23 thomas PROC_GOTD, gotd.pid, len);
1582 3efd8e31 2022-10-23 thomas if (wbuf == NULL)
1583 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_create REF_UPDATE_OK");
1585 3efd8e31 2022-10-23 thomas if (imsg_add(wbuf, &iok, sizeof(iok)) == -1)
1586 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_add REF_UPDATE_OK");
1587 3efd8e31 2022-10-23 thomas if (imsg_add(wbuf, refname, iok.name_len) == -1)
1588 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_add REF_UPDATE_OK");
1590 3efd8e31 2022-10-23 thomas wbuf->fd = -1;
1591 3efd8e31 2022-10-23 thomas imsg_close(&client->iev.ibuf, wbuf);
1592 3efd8e31 2022-10-23 thomas gotd_imsg_event_add(&client->iev);
1593 3efd8e31 2022-10-23 thomas return NULL;
1596 3efd8e31 2022-10-23 thomas static void
1597 3efd8e31 2022-10-23 thomas send_refs_updated(struct gotd_client *client)
1599 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->iev,
1600 3efd8e31 2022-10-23 thomas GOTD_IMSG_REFS_UPDATED, PROC_GOTD, -1, NULL, 0) == -1)
1601 3efd8e31 2022-10-23 thomas log_warn("imsg compose REFS_UPDATED");
1604 3efd8e31 2022-10-23 thomas static const struct got_error *
1605 3efd8e31 2022-10-23 thomas send_ref_update_ng(struct gotd_client *client,
1606 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update *iref, const char *refname,
1607 3efd8e31 2022-10-23 thomas const char *reason)
1609 3efd8e31 2022-10-23 thomas const struct got_error *ng_err;
1610 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update_ng ing;
1611 3efd8e31 2022-10-23 thomas struct ibuf *wbuf;
1612 3efd8e31 2022-10-23 thomas size_t len;
1614 3efd8e31 2022-10-23 thomas memset(&ing, 0, sizeof(ing));
1615 3efd8e31 2022-10-23 thomas ing.client_id = client->id;
1616 3efd8e31 2022-10-23 thomas memcpy(ing.old_id, iref->old_id, SHA1_DIGEST_LENGTH);
1617 3efd8e31 2022-10-23 thomas memcpy(ing.new_id, iref->new_id, SHA1_DIGEST_LENGTH);
1618 3efd8e31 2022-10-23 thomas ing.name_len = strlen(refname);
1620 3efd8e31 2022-10-23 thomas ng_err = got_error_fmt(GOT_ERR_REF_BUSY, "%s", reason);
1621 3efd8e31 2022-10-23 thomas ing.reason_len = strlen(ng_err->msg);
1623 3efd8e31 2022-10-23 thomas len = sizeof(ing) + ing.name_len + ing.reason_len;
1624 3efd8e31 2022-10-23 thomas wbuf = imsg_create(&client->iev.ibuf, GOTD_IMSG_REF_UPDATE_NG,
1625 3efd8e31 2022-10-23 thomas PROC_GOTD, gotd.pid, len);
1626 3efd8e31 2022-10-23 thomas if (wbuf == NULL)
1627 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_create REF_UPDATE_NG");
1629 3efd8e31 2022-10-23 thomas if (imsg_add(wbuf, &ing, sizeof(ing)) == -1)
1630 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_add REF_UPDATE_NG");
1631 3efd8e31 2022-10-23 thomas if (imsg_add(wbuf, refname, ing.name_len) == -1)
1632 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_add REF_UPDATE_NG");
1633 3efd8e31 2022-10-23 thomas if (imsg_add(wbuf, ng_err->msg, ing.reason_len) == -1)
1634 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_add REF_UPDATE_NG");
1636 3efd8e31 2022-10-23 thomas wbuf->fd = -1;
1637 3efd8e31 2022-10-23 thomas imsg_close(&client->iev.ibuf, wbuf);
1638 3efd8e31 2022-10-23 thomas gotd_imsg_event_add(&client->iev);
1639 3efd8e31 2022-10-23 thomas return NULL;
1642 3efd8e31 2022-10-23 thomas static const struct got_error *
1643 3efd8e31 2022-10-23 thomas install_pack(struct gotd_client *client, const char *repo_path,
1644 3efd8e31 2022-10-23 thomas struct imsg *imsg)
1646 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
1647 3efd8e31 2022-10-23 thomas struct gotd_imsg_packfile_install inst;
1648 3efd8e31 2022-10-23 thomas char hex[SHA1_DIGEST_STRING_LENGTH];
1649 3efd8e31 2022-10-23 thomas size_t datalen;
1650 3efd8e31 2022-10-23 thomas char *packfile_path = NULL, *packidx_path = NULL;
1652 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1653 3efd8e31 2022-10-23 thomas if (datalen != sizeof(inst))
1654 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1655 3efd8e31 2022-10-23 thomas memcpy(&inst, imsg->data, sizeof(inst));
1657 3efd8e31 2022-10-23 thomas if (client->packfile_path == NULL)
1658 3efd8e31 2022-10-23 thomas return got_error_msg(GOT_ERR_BAD_REQUEST,
1659 3efd8e31 2022-10-23 thomas "client has no pack file");
1660 3efd8e31 2022-10-23 thomas if (client->packidx_path == NULL)
1661 3efd8e31 2022-10-23 thomas return got_error_msg(GOT_ERR_BAD_REQUEST,
1662 3efd8e31 2022-10-23 thomas "client has no pack file index");
1664 3efd8e31 2022-10-23 thomas if (got_sha1_digest_to_str(inst.pack_sha1, hex, sizeof(hex)) == NULL)
1665 3efd8e31 2022-10-23 thomas return got_error_msg(GOT_ERR_NO_SPACE,
1666 3efd8e31 2022-10-23 thomas "could not convert pack file SHA1 to hex");
1668 3efd8e31 2022-10-23 thomas if (asprintf(&packfile_path, "/%s/%s/pack-%s.pack",
1669 3efd8e31 2022-10-23 thomas repo_path, GOT_OBJECTS_PACK_DIR, hex) == -1) {
1670 3efd8e31 2022-10-23 thomas err = got_error_from_errno("asprintf");
1671 3efd8e31 2022-10-23 thomas goto done;
1674 3efd8e31 2022-10-23 thomas if (asprintf(&packidx_path, "/%s/%s/pack-%s.idx",
1675 3efd8e31 2022-10-23 thomas repo_path, GOT_OBJECTS_PACK_DIR, hex) == -1) {
1676 3efd8e31 2022-10-23 thomas err = got_error_from_errno("asprintf");
1677 3efd8e31 2022-10-23 thomas goto done;
1680 3efd8e31 2022-10-23 thomas if (rename(client->packfile_path, packfile_path) == -1) {
1681 3efd8e31 2022-10-23 thomas err = got_error_from_errno3("rename", client->packfile_path,
1682 3efd8e31 2022-10-23 thomas packfile_path);
1683 3efd8e31 2022-10-23 thomas goto done;
1686 3efd8e31 2022-10-23 thomas free(client->packfile_path);
1687 3efd8e31 2022-10-23 thomas client->packfile_path = NULL;
1689 3efd8e31 2022-10-23 thomas if (rename(client->packidx_path, packidx_path) == -1) {
1690 3efd8e31 2022-10-23 thomas err = got_error_from_errno3("rename", client->packidx_path,
1691 3efd8e31 2022-10-23 thomas packidx_path);
1692 3efd8e31 2022-10-23 thomas goto done;
1695 3efd8e31 2022-10-23 thomas free(client->packidx_path);
1696 3efd8e31 2022-10-23 thomas client->packidx_path = NULL;
1698 3efd8e31 2022-10-23 thomas free(packfile_path);
1699 3efd8e31 2022-10-23 thomas free(packidx_path);
1700 3efd8e31 2022-10-23 thomas return err;
1703 3efd8e31 2022-10-23 thomas static const struct got_error *
1704 3efd8e31 2022-10-23 thomas begin_ref_updates(struct gotd_client *client, struct imsg *imsg)
1706 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_updates_start istart;
1707 3efd8e31 2022-10-23 thomas size_t datalen;
1709 3efd8e31 2022-10-23 thomas if (client->nref_updates != -1)
1710 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_MSG);
1712 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1713 3efd8e31 2022-10-23 thomas if (datalen != sizeof(istart))
1714 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1715 3efd8e31 2022-10-23 thomas memcpy(&istart, imsg->data, sizeof(istart));
1717 3efd8e31 2022-10-23 thomas if (istart.nref_updates <= 0)
1718 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_MSG);
1720 3efd8e31 2022-10-23 thomas client->nref_updates = istart.nref_updates;
1721 3efd8e31 2022-10-23 thomas return NULL;
1724 3efd8e31 2022-10-23 thomas static const struct got_error *
1725 3efd8e31 2022-10-23 thomas update_ref(struct gotd_client *client, const char *repo_path,
1726 3efd8e31 2022-10-23 thomas struct imsg *imsg)
1728 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
1729 3efd8e31 2022-10-23 thomas struct got_repository *repo = NULL;
1730 3efd8e31 2022-10-23 thomas struct got_reference *ref = NULL;
1731 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update iref;
1732 3efd8e31 2022-10-23 thomas struct got_object_id old_id, new_id;
1733 3efd8e31 2022-10-23 thomas struct got_object_id *id = NULL;
1734 3efd8e31 2022-10-23 thomas struct got_object *obj = NULL;
1735 3efd8e31 2022-10-23 thomas char *refname = NULL;
1736 3efd8e31 2022-10-23 thomas size_t datalen;
1737 3efd8e31 2022-10-23 thomas int locked = 0;
1739 3efd8e31 2022-10-23 thomas log_debug("update-ref from uid %d", client->euid);
1741 3efd8e31 2022-10-23 thomas if (client->nref_updates <= 0)
1742 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_MSG);
1744 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1745 3efd8e31 2022-10-23 thomas if (datalen < sizeof(iref))
1746 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1747 3efd8e31 2022-10-23 thomas memcpy(&iref, imsg->data, sizeof(iref));
1748 3efd8e31 2022-10-23 thomas if (datalen != sizeof(iref) + iref.name_len)
1749 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1750 3efd8e31 2022-10-23 thomas refname = malloc(iref.name_len + 1);
1751 3efd8e31 2022-10-23 thomas if (refname == NULL)
1752 3efd8e31 2022-10-23 thomas return got_error_from_errno("malloc");
1753 3efd8e31 2022-10-23 thomas memcpy(refname, imsg->data + sizeof(iref), iref.name_len);
1754 3efd8e31 2022-10-23 thomas refname[iref.name_len] = '\0';
1756 3efd8e31 2022-10-23 thomas log_debug("updating ref %s for uid %d", refname, client->euid);
1758 3efd8e31 2022-10-23 thomas err = got_repo_open(&repo, repo_path, NULL, NULL);
1759 3efd8e31 2022-10-23 thomas if (err)
1760 3efd8e31 2022-10-23 thomas goto done;
1762 3efd8e31 2022-10-23 thomas memcpy(old_id.sha1, iref.old_id, SHA1_DIGEST_LENGTH);
1763 3efd8e31 2022-10-23 thomas memcpy(new_id.sha1, iref.new_id, SHA1_DIGEST_LENGTH);
1764 3efd8e31 2022-10-23 thomas err = got_object_open(&obj, repo, &new_id);
1765 3efd8e31 2022-10-23 thomas if (err)
1766 3efd8e31 2022-10-23 thomas goto done;
1768 3efd8e31 2022-10-23 thomas if (iref.ref_is_new) {
1769 3efd8e31 2022-10-23 thomas err = got_ref_open(&ref, repo, refname, 0);
1770 3efd8e31 2022-10-23 thomas if (err) {
1771 3efd8e31 2022-10-23 thomas if (err->code != GOT_ERR_NOT_REF)
1772 3efd8e31 2022-10-23 thomas goto done;
1773 3efd8e31 2022-10-23 thomas err = got_ref_alloc(&ref, refname, &new_id);
1774 3efd8e31 2022-10-23 thomas if (err)
1775 3efd8e31 2022-10-23 thomas goto done;
1776 3efd8e31 2022-10-23 thomas err = got_ref_write(ref, repo); /* will lock/unlock */
1777 3efd8e31 2022-10-23 thomas if (err)
1778 3efd8e31 2022-10-23 thomas goto done;
1779 3efd8e31 2022-10-23 thomas } else {
1780 3efd8e31 2022-10-23 thomas err = got_error_fmt(GOT_ERR_REF_BUSY,
1781 3efd8e31 2022-10-23 thomas "%s has been created by someone else "
1782 3efd8e31 2022-10-23 thomas "while transaction was in progress",
1783 3efd8e31 2022-10-23 thomas got_ref_get_name(ref));
1784 3efd8e31 2022-10-23 thomas goto done;
1786 3efd8e31 2022-10-23 thomas } else {
1787 3efd8e31 2022-10-23 thomas err = got_ref_open(&ref, repo, refname, 1 /* lock */);
1788 3efd8e31 2022-10-23 thomas if (err)
1789 3efd8e31 2022-10-23 thomas goto done;
1790 3efd8e31 2022-10-23 thomas locked = 1;
1792 3efd8e31 2022-10-23 thomas err = got_ref_resolve(&id, repo, ref);
1793 3efd8e31 2022-10-23 thomas if (err)
1794 3efd8e31 2022-10-23 thomas goto done;
1796 3efd8e31 2022-10-23 thomas if (got_object_id_cmp(id, &old_id) != 0) {
1797 3efd8e31 2022-10-23 thomas err = got_error_fmt(GOT_ERR_REF_BUSY,
1798 3efd8e31 2022-10-23 thomas "%s has been modified by someone else "
1799 3efd8e31 2022-10-23 thomas "while transaction was in progress",
1800 3efd8e31 2022-10-23 thomas got_ref_get_name(ref));
1801 3efd8e31 2022-10-23 thomas goto done;
1804 3efd8e31 2022-10-23 thomas err = got_ref_change_ref(ref, &new_id);
1805 3efd8e31 2022-10-23 thomas if (err)
1806 3efd8e31 2022-10-23 thomas goto done;
1808 3efd8e31 2022-10-23 thomas err = got_ref_write(ref, repo);
1809 3efd8e31 2022-10-23 thomas if (err)
1810 3efd8e31 2022-10-23 thomas goto done;
1812 3efd8e31 2022-10-23 thomas free(id);
1813 3efd8e31 2022-10-23 thomas id = NULL;
1816 3efd8e31 2022-10-23 thomas if (err) {
1817 3efd8e31 2022-10-23 thomas if (err->code == GOT_ERR_LOCKFILE_TIMEOUT) {
1818 3efd8e31 2022-10-23 thomas err = got_error_fmt(GOT_ERR_LOCKFILE_TIMEOUT,
1819 3efd8e31 2022-10-23 thomas "could not acquire exclusive file lock for %s",
1820 3efd8e31 2022-10-23 thomas refname);
1822 3efd8e31 2022-10-23 thomas send_ref_update_ng(client, &iref, refname, err->msg);
1824 3efd8e31 2022-10-23 thomas send_ref_update_ok(client, &iref, refname);
1826 3efd8e31 2022-10-23 thomas if (client->nref_updates > 0) {
1827 3efd8e31 2022-10-23 thomas client->nref_updates--;
1828 3efd8e31 2022-10-23 thomas if (client->nref_updates == 0)
1829 3efd8e31 2022-10-23 thomas send_refs_updated(client);
1832 3efd8e31 2022-10-23 thomas if (locked) {
1833 3efd8e31 2022-10-23 thomas const struct got_error *unlock_err;
1834 3efd8e31 2022-10-23 thomas unlock_err = got_ref_unlock(ref);
1835 3efd8e31 2022-10-23 thomas if (unlock_err && err == NULL)
1836 3efd8e31 2022-10-23 thomas err = unlock_err;
1838 3efd8e31 2022-10-23 thomas if (ref)
1839 3efd8e31 2022-10-23 thomas got_ref_close(ref);
1840 3efd8e31 2022-10-23 thomas if (obj)
1841 3efd8e31 2022-10-23 thomas got_object_close(obj);
1842 3efd8e31 2022-10-23 thomas if (repo)
1843 3efd8e31 2022-10-23 thomas got_repo_close(repo);
1844 3efd8e31 2022-10-23 thomas free(refname);
1845 3efd8e31 2022-10-23 thomas free(id);
1846 3efd8e31 2022-10-23 thomas return err;
1849 3efd8e31 2022-10-23 thomas static void
1850 85b37c72 2022-12-30 thomas gotd_dispatch_listener(int fd, short event, void *arg)
1852 3efd8e31 2022-10-23 thomas struct gotd_imsgev *iev = arg;
1853 3efd8e31 2022-10-23 thomas struct imsgbuf *ibuf = &iev->ibuf;
1854 85b37c72 2022-12-30 thomas struct gotd_child_proc *proc = &gotd.listen_proc;
1855 85b37c72 2022-12-30 thomas ssize_t n;
1856 85b37c72 2022-12-30 thomas int shut = 0;
1857 85b37c72 2022-12-30 thomas struct imsg imsg;
1859 85b37c72 2022-12-30 thomas if (proc->iev.ibuf.fd != fd)
1860 85b37c72 2022-12-30 thomas fatalx("%s: unexpected fd %d", __func__, fd);
1862 85b37c72 2022-12-30 thomas if (event & EV_READ) {
1863 85b37c72 2022-12-30 thomas if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
1864 85b37c72 2022-12-30 thomas fatal("imsg_read error");
1865 85b37c72 2022-12-30 thomas if (n == 0) {
1866 85b37c72 2022-12-30 thomas /* Connection closed. */
1867 85b37c72 2022-12-30 thomas shut = 1;
1868 85b37c72 2022-12-30 thomas goto done;
1872 85b37c72 2022-12-30 thomas if (event & EV_WRITE) {
1873 85b37c72 2022-12-30 thomas n = msgbuf_write(&ibuf->w);
1874 85b37c72 2022-12-30 thomas if (n == -1 && errno != EAGAIN)
1875 85b37c72 2022-12-30 thomas fatal("msgbuf_write");
1876 85b37c72 2022-12-30 thomas if (n == 0) {
1877 85b37c72 2022-12-30 thomas /* Connection closed. */
1878 85b37c72 2022-12-30 thomas shut = 1;
1879 85b37c72 2022-12-30 thomas goto done;
1883 85b37c72 2022-12-30 thomas for (;;) {
1884 85b37c72 2022-12-30 thomas const struct got_error *err = NULL;
1885 85b37c72 2022-12-30 thomas struct gotd_client *client = NULL;
1886 85b37c72 2022-12-30 thomas uint32_t client_id = 0;
1887 85b37c72 2022-12-30 thomas int do_disconnect = 0;
1889 85b37c72 2022-12-30 thomas if ((n = imsg_get(ibuf, &imsg)) == -1)
1890 85b37c72 2022-12-30 thomas fatal("%s: imsg_get error", __func__);
1891 85b37c72 2022-12-30 thomas if (n == 0) /* No more messages. */
1894 85b37c72 2022-12-30 thomas switch (imsg.hdr.type) {
1895 85b37c72 2022-12-30 thomas case GOTD_IMSG_ERROR:
1896 85b37c72 2022-12-30 thomas do_disconnect = 1;
1897 85b37c72 2022-12-30 thomas err = gotd_imsg_recv_error(&client_id, &imsg);
1899 85b37c72 2022-12-30 thomas case GOTD_IMSG_CONNECT:
1900 85b37c72 2022-12-30 thomas err = recv_connect(&client_id, &imsg);
1902 85b37c72 2022-12-30 thomas default:
1903 85b37c72 2022-12-30 thomas log_debug("unexpected imsg %d", imsg.hdr.type);
1907 85b37c72 2022-12-30 thomas client = find_client(client_id);
1908 85b37c72 2022-12-30 thomas if (client == NULL) {
1909 85b37c72 2022-12-30 thomas log_warnx("%s: client not found", __func__);
1910 85b37c72 2022-12-30 thomas imsg_free(&imsg);
1911 85b37c72 2022-12-30 thomas continue;
1914 85b37c72 2022-12-30 thomas if (err)
1915 85b37c72 2022-12-30 thomas log_warnx("uid %d: %s", client->euid, err->msg);
1917 85b37c72 2022-12-30 thomas if (do_disconnect) {
1918 85b37c72 2022-12-30 thomas if (err)
1919 85b37c72 2022-12-30 thomas disconnect_on_error(client, err);
1921 85b37c72 2022-12-30 thomas disconnect(client);
1924 85b37c72 2022-12-30 thomas imsg_free(&imsg);
1927 85b37c72 2022-12-30 thomas if (!shut) {
1928 85b37c72 2022-12-30 thomas gotd_imsg_event_add(iev);
1929 85b37c72 2022-12-30 thomas } else {
1930 85b37c72 2022-12-30 thomas /* This pipe is dead. Remove its event handler */
1931 85b37c72 2022-12-30 thomas event_del(&iev->ev);
1932 85b37c72 2022-12-30 thomas event_loopexit(NULL);
1936 85b37c72 2022-12-30 thomas static void
1937 c669c489 2022-12-30 thomas gotd_dispatch_auth_child(int fd, short event, void *arg)
1939 c669c489 2022-12-30 thomas const struct got_error *err = NULL;
1940 c669c489 2022-12-30 thomas struct gotd_imsgev *iev = arg;
1941 c669c489 2022-12-30 thomas struct imsgbuf *ibuf = &iev->ibuf;
1942 c669c489 2022-12-30 thomas struct gotd_client *client;
1943 c669c489 2022-12-30 thomas struct gotd_repo *repo = NULL;
1944 c669c489 2022-12-30 thomas ssize_t n;
1945 c669c489 2022-12-30 thomas int shut = 0;
1946 c669c489 2022-12-30 thomas struct imsg imsg;
1947 c669c489 2022-12-30 thomas uint32_t client_id = 0;
1948 c669c489 2022-12-30 thomas int do_disconnect = 0;
1949 c669c489 2022-12-30 thomas enum gotd_procid proc_type;
1951 c669c489 2022-12-30 thomas client = find_client_by_proc_fd(fd);
1952 c669c489 2022-12-30 thomas if (client == NULL)
1953 c669c489 2022-12-30 thomas fatalx("cannot find client for fd %d", fd);
1955 c669c489 2022-12-30 thomas if (client->auth == NULL)
1956 c669c489 2022-12-30 thomas fatalx("cannot find auth child process for fd %d", fd);
1958 c669c489 2022-12-30 thomas if (event & EV_READ) {
1959 c669c489 2022-12-30 thomas if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
1960 c669c489 2022-12-30 thomas fatal("imsg_read error");
1961 c669c489 2022-12-30 thomas if (n == 0) {
1962 c669c489 2022-12-30 thomas /* Connection closed. */
1963 c669c489 2022-12-30 thomas shut = 1;
1964 c669c489 2022-12-30 thomas goto done;
1968 c669c489 2022-12-30 thomas if (event & EV_WRITE) {
1969 c669c489 2022-12-30 thomas n = msgbuf_write(&ibuf->w);
1970 c669c489 2022-12-30 thomas if (n == -1 && errno != EAGAIN)
1971 c669c489 2022-12-30 thomas fatal("msgbuf_write");
1972 c669c489 2022-12-30 thomas if (n == 0) {
1973 c669c489 2022-12-30 thomas /* Connection closed. */
1974 c669c489 2022-12-30 thomas shut = 1;
1976 c669c489 2022-12-30 thomas goto done;
1979 c669c489 2022-12-30 thomas if (client->auth->iev.ibuf.fd != fd)
1980 c669c489 2022-12-30 thomas fatalx("%s: unexpected fd %d", __func__, fd);
1982 c669c489 2022-12-30 thomas if ((n = imsg_get(ibuf, &imsg)) == -1)
1983 c669c489 2022-12-30 thomas fatal("%s: imsg_get error", __func__);
1984 c669c489 2022-12-30 thomas if (n == 0) /* No more messages. */
1987 c669c489 2022-12-30 thomas evtimer_del(&client->tmo);
1989 c669c489 2022-12-30 thomas switch (imsg.hdr.type) {
1990 c669c489 2022-12-30 thomas case GOTD_IMSG_ERROR:
1991 c669c489 2022-12-30 thomas do_disconnect = 1;
1992 c669c489 2022-12-30 thomas err = gotd_imsg_recv_error(&client_id, &imsg);
1994 c669c489 2022-12-30 thomas case GOTD_IMSG_ACCESS_GRANTED:
1996 c669c489 2022-12-30 thomas default:
1997 c669c489 2022-12-30 thomas do_disconnect = 1;
1998 c669c489 2022-12-30 thomas log_debug("unexpected imsg %d", imsg.hdr.type);
2002 c669c489 2022-12-30 thomas if (!verify_imsg_src(client, client->auth, &imsg)) {
2003 c669c489 2022-12-30 thomas do_disconnect = 1;
2004 c669c489 2022-12-30 thomas log_debug("dropping imsg type %d from PID %d",
2005 c669c489 2022-12-30 thomas imsg.hdr.type, client->auth->pid);
2007 c669c489 2022-12-30 thomas imsg_free(&imsg);
2009 c669c489 2022-12-30 thomas if (do_disconnect) {
2010 c669c489 2022-12-30 thomas if (err)
2011 c669c489 2022-12-30 thomas disconnect_on_error(client, err);
2013 c669c489 2022-12-30 thomas disconnect(client);
2014 c669c489 2022-12-30 thomas goto done;
2017 c669c489 2022-12-30 thomas repo = find_repo_by_name(client->auth->repo_name);
2018 c669c489 2022-12-30 thomas if (repo == NULL) {
2019 c669c489 2022-12-30 thomas err = got_error(GOT_ERR_NOT_GIT_REPO);
2020 c669c489 2022-12-30 thomas goto done;
2022 c669c489 2022-12-30 thomas kill_auth_proc(client);
2024 c669c489 2022-12-30 thomas log_info("authenticated uid %d for repository %s\n",
2025 c669c489 2022-12-30 thomas client->euid, repo->name);
2027 c669c489 2022-12-30 thomas if (client->required_auth & GOTD_AUTH_WRITE)
2028 c669c489 2022-12-30 thomas proc_type = PROC_REPO_WRITE;
2030 c669c489 2022-12-30 thomas proc_type = PROC_REPO_READ;
2032 c669c489 2022-12-30 thomas err = start_repo_child(client, proc_type, repo,
2033 c669c489 2022-12-30 thomas gotd.argv0, gotd.confpath, gotd.daemonize,
2034 c669c489 2022-12-30 thomas gotd.verbosity);
2036 c669c489 2022-12-30 thomas if (err)
2037 c669c489 2022-12-30 thomas log_warnx("uid %d: %s", client->euid, err->msg);
2039 c669c489 2022-12-30 thomas /* We might have killed the auth process by now. */
2040 c669c489 2022-12-30 thomas if (client->auth != NULL) {
2041 c669c489 2022-12-30 thomas if (!shut) {
2042 c669c489 2022-12-30 thomas gotd_imsg_event_add(iev);
2043 c669c489 2022-12-30 thomas } else {
2044 c669c489 2022-12-30 thomas /* This pipe is dead. Remove its event handler */
2045 c669c489 2022-12-30 thomas event_del(&iev->ev);
2050 c669c489 2022-12-30 thomas static void
2051 85b37c72 2022-12-30 thomas gotd_dispatch_repo_child(int fd, short event, void *arg)
2053 85b37c72 2022-12-30 thomas struct gotd_imsgev *iev = arg;
2054 85b37c72 2022-12-30 thomas struct imsgbuf *ibuf = &iev->ibuf;
2055 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc = NULL;
2056 85b37c72 2022-12-30 thomas struct gotd_client *client = NULL;
2057 3efd8e31 2022-10-23 thomas ssize_t n;
2058 3efd8e31 2022-10-23 thomas int shut = 0;
2059 3efd8e31 2022-10-23 thomas struct imsg imsg;
2061 3efd8e31 2022-10-23 thomas if (event & EV_READ) {
2062 3efd8e31 2022-10-23 thomas if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
2063 3efd8e31 2022-10-23 thomas fatal("imsg_read error");
2064 3efd8e31 2022-10-23 thomas if (n == 0) {
2065 3efd8e31 2022-10-23 thomas /* Connection closed. */
2066 3efd8e31 2022-10-23 thomas shut = 1;
2067 3efd8e31 2022-10-23 thomas goto done;
2071 3efd8e31 2022-10-23 thomas if (event & EV_WRITE) {
2072 3efd8e31 2022-10-23 thomas n = msgbuf_write(&ibuf->w);
2073 3efd8e31 2022-10-23 thomas if (n == -1 && errno != EAGAIN)
2074 3efd8e31 2022-10-23 thomas fatal("msgbuf_write");
2075 3efd8e31 2022-10-23 thomas if (n == 0) {
2076 3efd8e31 2022-10-23 thomas /* Connection closed. */
2077 3efd8e31 2022-10-23 thomas shut = 1;
2078 3efd8e31 2022-10-23 thomas goto done;
2082 85b37c72 2022-12-30 thomas client = find_client_by_proc_fd(fd);
2083 85b37c72 2022-12-30 thomas if (client == NULL)
2084 85b37c72 2022-12-30 thomas fatalx("cannot find client for fd %d", fd);
2086 85b37c72 2022-12-30 thomas proc = get_client_proc(client);
2087 3efd8e31 2022-10-23 thomas if (proc == NULL)
2088 3efd8e31 2022-10-23 thomas fatalx("cannot find child process for fd %d", fd);
2090 3efd8e31 2022-10-23 thomas for (;;) {
2091 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
2092 3efd8e31 2022-10-23 thomas uint32_t client_id = 0;
2093 3efd8e31 2022-10-23 thomas int do_disconnect = 0;
2094 85b37c72 2022-12-30 thomas int do_list_refs = 0, do_ref_updates = 0, do_ref_update = 0;
2095 3efd8e31 2022-10-23 thomas int do_packfile_install = 0;
2097 3efd8e31 2022-10-23 thomas if ((n = imsg_get(ibuf, &imsg)) == -1)
2098 3efd8e31 2022-10-23 thomas fatal("%s: imsg_get error", __func__);
2099 3efd8e31 2022-10-23 thomas if (n == 0) /* No more messages. */
2102 3efd8e31 2022-10-23 thomas switch (imsg.hdr.type) {
2103 3efd8e31 2022-10-23 thomas case GOTD_IMSG_ERROR:
2104 3efd8e31 2022-10-23 thomas do_disconnect = 1;
2105 3efd8e31 2022-10-23 thomas err = gotd_imsg_recv_error(&client_id, &imsg);
2107 85b37c72 2022-12-30 thomas case GOTD_IMSG_REPO_CHILD_READY:
2108 85b37c72 2022-12-30 thomas do_list_refs = 1;
2110 3efd8e31 2022-10-23 thomas case GOTD_IMSG_PACKFILE_DONE:
2111 3efd8e31 2022-10-23 thomas do_disconnect = 1;
2112 3efd8e31 2022-10-23 thomas err = recv_packfile_done(&client_id, &imsg);
2114 3efd8e31 2022-10-23 thomas case GOTD_IMSG_PACKFILE_INSTALL:
2115 3efd8e31 2022-10-23 thomas err = recv_packfile_install(&client_id, &imsg);
2116 3efd8e31 2022-10-23 thomas if (err == NULL)
2117 3efd8e31 2022-10-23 thomas do_packfile_install = 1;
2119 3efd8e31 2022-10-23 thomas case GOTD_IMSG_REF_UPDATES_START:
2120 3efd8e31 2022-10-23 thomas err = recv_ref_updates_start(&client_id, &imsg);
2121 3efd8e31 2022-10-23 thomas if (err == NULL)
2122 3efd8e31 2022-10-23 thomas do_ref_updates = 1;
2124 3efd8e31 2022-10-23 thomas case GOTD_IMSG_REF_UPDATE:
2125 3efd8e31 2022-10-23 thomas err = recv_ref_update(&client_id, &imsg);
2126 3efd8e31 2022-10-23 thomas if (err == NULL)
2127 3efd8e31 2022-10-23 thomas do_ref_update = 1;
2129 3efd8e31 2022-10-23 thomas default:
2130 3efd8e31 2022-10-23 thomas log_debug("unexpected imsg %d", imsg.hdr.type);
2134 3efd8e31 2022-10-23 thomas if (!verify_imsg_src(client, proc, &imsg)) {
2135 3efd8e31 2022-10-23 thomas log_debug("dropping imsg type %d from PID %d",
2136 3efd8e31 2022-10-23 thomas imsg.hdr.type, proc->pid);
2137 3efd8e31 2022-10-23 thomas imsg_free(&imsg);
2138 3efd8e31 2022-10-23 thomas continue;
2140 3efd8e31 2022-10-23 thomas if (err)
2141 3efd8e31 2022-10-23 thomas log_warnx("uid %d: %s", client->euid, err->msg);
2143 3efd8e31 2022-10-23 thomas if (do_disconnect) {
2144 3efd8e31 2022-10-23 thomas if (err)
2145 3efd8e31 2022-10-23 thomas disconnect_on_error(client, err);
2147 3efd8e31 2022-10-23 thomas disconnect(client);
2148 965fcba6 2022-11-04 thomas } else {
2149 85b37c72 2022-12-30 thomas if (do_list_refs)
2150 85b37c72 2022-12-30 thomas err = list_refs_request(client, iev);
2151 85b37c72 2022-12-30 thomas else if (do_packfile_install)
2152 414e37cb 2022-12-30 thomas err = install_pack(client, proc->repo_path,
2154 965fcba6 2022-11-04 thomas else if (do_ref_updates)
2155 965fcba6 2022-11-04 thomas err = begin_ref_updates(client, &imsg);
2156 965fcba6 2022-11-04 thomas else if (do_ref_update)
2157 414e37cb 2022-12-30 thomas err = update_ref(client, proc->repo_path,
2159 965fcba6 2022-11-04 thomas if (err)
2160 965fcba6 2022-11-04 thomas log_warnx("uid %d: %s", client->euid, err->msg);
2162 3efd8e31 2022-10-23 thomas imsg_free(&imsg);
2165 3efd8e31 2022-10-23 thomas if (!shut) {
2166 3efd8e31 2022-10-23 thomas gotd_imsg_event_add(iev);
2167 3efd8e31 2022-10-23 thomas } else {
2168 3efd8e31 2022-10-23 thomas /* This pipe is dead. Remove its event handler */
2169 3efd8e31 2022-10-23 thomas event_del(&iev->ev);
2170 3efd8e31 2022-10-23 thomas event_loopexit(NULL);
2174 3efd8e31 2022-10-23 thomas static pid_t
2175 414e37cb 2022-12-30 thomas start_child(enum gotd_procid proc_id, const char *repo_path,
2176 832b8374 2022-10-31 thomas char *argv0, const char *confpath, int fd, int daemonize, int verbosity)
2178 832b8374 2022-10-31 thomas char *argv[11];
2179 3efd8e31 2022-10-23 thomas int argc = 0;
2180 3efd8e31 2022-10-23 thomas pid_t pid;
2182 3efd8e31 2022-10-23 thomas switch (pid = fork()) {
2183 3efd8e31 2022-10-23 thomas case -1:
2184 3efd8e31 2022-10-23 thomas fatal("cannot fork");
2187 3efd8e31 2022-10-23 thomas default:
2188 3efd8e31 2022-10-23 thomas close(fd);
2189 3efd8e31 2022-10-23 thomas return pid;
2192 bb3a6ce9 2022-11-17 thomas if (fd != GOTD_FILENO_MSG_PIPE) {
2193 bb3a6ce9 2022-11-17 thomas if (dup2(fd, GOTD_FILENO_MSG_PIPE) == -1)
2194 3efd8e31 2022-10-23 thomas fatal("cannot setup imsg fd");
2195 3efd8e31 2022-10-23 thomas } else if (fcntl(fd, F_SETFD, 0) == -1)
2196 3efd8e31 2022-10-23 thomas fatal("cannot setup imsg fd");
2198 3efd8e31 2022-10-23 thomas argv[argc++] = argv0;
2199 3efd8e31 2022-10-23 thomas switch (proc_id) {
2200 2b3d32a1 2022-12-30 thomas case PROC_LISTEN:
2201 2b3d32a1 2022-12-30 thomas argv[argc++] = (char *)"-L";
2203 c669c489 2022-12-30 thomas case PROC_AUTH:
2204 c669c489 2022-12-30 thomas argv[argc++] = (char *)"-A";
2206 3efd8e31 2022-10-23 thomas case PROC_REPO_READ:
2207 3efd8e31 2022-10-23 thomas argv[argc++] = (char *)"-R";
2209 3efd8e31 2022-10-23 thomas case PROC_REPO_WRITE:
2210 3efd8e31 2022-10-23 thomas argv[argc++] = (char *)"-W";
2212 3efd8e31 2022-10-23 thomas default:
2213 3efd8e31 2022-10-23 thomas fatalx("invalid process id %d", proc_id);
2216 832b8374 2022-10-31 thomas argv[argc++] = (char *)"-f";
2217 832b8374 2022-10-31 thomas argv[argc++] = (char *)confpath;
2219 414e37cb 2022-12-30 thomas if (repo_path) {
2220 2b3d32a1 2022-12-30 thomas argv[argc++] = (char *)"-P";
2221 414e37cb 2022-12-30 thomas argv[argc++] = (char *)repo_path;
2224 3efd8e31 2022-10-23 thomas if (!daemonize)
2225 3efd8e31 2022-10-23 thomas argv[argc++] = (char *)"-d";
2226 3efd8e31 2022-10-23 thomas if (verbosity > 0)
2227 3efd8e31 2022-10-23 thomas argv[argc++] = (char *)"-v";
2228 3efd8e31 2022-10-23 thomas if (verbosity > 1)
2229 3efd8e31 2022-10-23 thomas argv[argc++] = (char *)"-v";
2230 3efd8e31 2022-10-23 thomas argv[argc++] = NULL;
2232 3efd8e31 2022-10-23 thomas execvp(argv0, argv);
2233 3efd8e31 2022-10-23 thomas fatal("execvp");
2236 3efd8e31 2022-10-23 thomas static void
2237 2b3d32a1 2022-12-30 thomas start_listener(char *argv0, const char *confpath, int daemonize, int verbosity)
2239 85b37c72 2022-12-30 thomas struct gotd_child_proc *proc = &gotd.listen_proc;
2241 2b3d32a1 2022-12-30 thomas proc->type = PROC_LISTEN;
2243 2b3d32a1 2022-12-30 thomas if (socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK,
2244 2b3d32a1 2022-12-30 thomas PF_UNSPEC, proc->pipe) == -1)
2245 2b3d32a1 2022-12-30 thomas fatal("socketpair");
2247 2b3d32a1 2022-12-30 thomas proc->pid = start_child(proc->type, NULL, argv0, confpath,
2248 2b3d32a1 2022-12-30 thomas proc->pipe[1], daemonize, verbosity);
2249 2b3d32a1 2022-12-30 thomas imsg_init(&proc->iev.ibuf, proc->pipe[0]);
2250 85b37c72 2022-12-30 thomas proc->iev.handler = gotd_dispatch_listener;
2251 2b3d32a1 2022-12-30 thomas proc->iev.events = EV_READ;
2252 2b3d32a1 2022-12-30 thomas proc->iev.handler_arg = NULL;
2255 85b37c72 2022-12-30 thomas static const struct got_error *
2256 85b37c72 2022-12-30 thomas start_repo_child(struct gotd_client *client, enum gotd_procid proc_type,
2257 85b37c72 2022-12-30 thomas struct gotd_repo *repo, char *argv0, const char *confpath,
2258 832b8374 2022-10-31 thomas int daemonize, int verbosity)
2260 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc;
2262 85b37c72 2022-12-30 thomas if (proc_type != PROC_REPO_READ && proc_type != PROC_REPO_WRITE)
2263 85b37c72 2022-12-30 thomas return got_error_msg(GOT_ERR_NOT_IMPL, "bad process type");
2265 85b37c72 2022-12-30 thomas proc = calloc(1, sizeof(*proc));
2266 85b37c72 2022-12-30 thomas if (proc == NULL)
2267 85b37c72 2022-12-30 thomas return got_error_from_errno("calloc");
2269 85b37c72 2022-12-30 thomas proc->type = proc_type;
2270 85b37c72 2022-12-30 thomas if (strlcpy(proc->repo_name, repo->name,
2271 85b37c72 2022-12-30 thomas sizeof(proc->repo_name)) >= sizeof(proc->repo_name))
2272 85b37c72 2022-12-30 thomas fatalx("repository name too long: %s", repo->name);
2273 85b37c72 2022-12-30 thomas log_debug("starting %s for repository %s",
2274 85b37c72 2022-12-30 thomas proc->type == PROC_REPO_READ ? "reader" : "writer", repo->name);
2275 85b37c72 2022-12-30 thomas if (realpath(repo->path, proc->repo_path) == NULL)
2276 85b37c72 2022-12-30 thomas fatal("%s", repo->path);
2277 85b37c72 2022-12-30 thomas if (socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK,
2278 85b37c72 2022-12-30 thomas PF_UNSPEC, proc->pipe) == -1)
2279 85b37c72 2022-12-30 thomas fatal("socketpair");
2280 85b37c72 2022-12-30 thomas proc->pid = start_child(proc->type, proc->repo_path, argv0,
2281 85b37c72 2022-12-30 thomas confpath, proc->pipe[1], daemonize, verbosity);
2282 85b37c72 2022-12-30 thomas imsg_init(&proc->iev.ibuf, proc->pipe[0]);
2283 85b37c72 2022-12-30 thomas log_debug("proc %s %s is on fd %d",
2284 85b37c72 2022-12-30 thomas gotd_proc_names[proc->type], proc->repo_path,
2285 85b37c72 2022-12-30 thomas proc->pipe[0]);
2286 85b37c72 2022-12-30 thomas proc->iev.handler = gotd_dispatch_repo_child;
2287 85b37c72 2022-12-30 thomas proc->iev.events = EV_READ;
2288 85b37c72 2022-12-30 thomas proc->iev.handler_arg = NULL;
2289 85b37c72 2022-12-30 thomas event_set(&proc->iev.ev, proc->iev.ibuf.fd, EV_READ,
2290 85b37c72 2022-12-30 thomas gotd_dispatch_repo_child, &proc->iev);
2291 85b37c72 2022-12-30 thomas gotd_imsg_event_add(&proc->iev);
2293 85b37c72 2022-12-30 thomas if (proc->type == PROC_REPO_READ)
2294 85b37c72 2022-12-30 thomas client->repo_read = proc;
2296 85b37c72 2022-12-30 thomas client->repo_write = proc;
2298 c669c489 2022-12-30 thomas return NULL;
2301 c669c489 2022-12-30 thomas static const struct got_error *
2302 c669c489 2022-12-30 thomas start_auth_child(struct gotd_client *client, int required_auth,
2303 c669c489 2022-12-30 thomas struct gotd_repo *repo, char *argv0, const char *confpath,
2304 c669c489 2022-12-30 thomas int daemonize, int verbosity)
2306 c669c489 2022-12-30 thomas struct gotd_child_proc *proc;
2307 c669c489 2022-12-30 thomas struct gotd_imsg_auth iauth;
2308 c669c489 2022-12-30 thomas struct timeval auth_timeout = { 5, 0 };
2310 c669c489 2022-12-30 thomas memset(&iauth, 0, sizeof(iauth));
2312 c669c489 2022-12-30 thomas proc = calloc(1, sizeof(*proc));
2313 c669c489 2022-12-30 thomas if (proc == NULL)
2314 c669c489 2022-12-30 thomas return got_error_from_errno("calloc");
2316 c669c489 2022-12-30 thomas proc->type = PROC_AUTH;
2317 c669c489 2022-12-30 thomas if (strlcpy(proc->repo_name, repo->name,
2318 c669c489 2022-12-30 thomas sizeof(proc->repo_name)) >= sizeof(proc->repo_name))
2319 c669c489 2022-12-30 thomas fatalx("repository name too long: %s", repo->name);
2320 c669c489 2022-12-30 thomas log_debug("starting auth for uid %d repository %s",
2321 c669c489 2022-12-30 thomas client->euid, repo->name);
2322 c669c489 2022-12-30 thomas if (realpath(repo->path, proc->repo_path) == NULL)
2323 c669c489 2022-12-30 thomas fatal("%s", repo->path);
2324 c669c489 2022-12-30 thomas if (socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK,
2325 c669c489 2022-12-30 thomas PF_UNSPEC, proc->pipe) == -1)
2326 c669c489 2022-12-30 thomas fatal("socketpair");
2327 c669c489 2022-12-30 thomas proc->pid = start_child(proc->type, proc->repo_path, argv0,
2328 c669c489 2022-12-30 thomas confpath, proc->pipe[1], daemonize, verbosity);
2329 c669c489 2022-12-30 thomas imsg_init(&proc->iev.ibuf, proc->pipe[0]);
2330 c669c489 2022-12-30 thomas log_debug("proc %s %s is on fd %d",
2331 c669c489 2022-12-30 thomas gotd_proc_names[proc->type], proc->repo_path,
2332 c669c489 2022-12-30 thomas proc->pipe[0]);
2333 c669c489 2022-12-30 thomas proc->iev.handler = gotd_dispatch_auth_child;
2334 c669c489 2022-12-30 thomas proc->iev.events = EV_READ;
2335 c669c489 2022-12-30 thomas proc->iev.handler_arg = NULL;
2336 c669c489 2022-12-30 thomas event_set(&proc->iev.ev, proc->iev.ibuf.fd, EV_READ,
2337 c669c489 2022-12-30 thomas gotd_dispatch_auth_child, &proc->iev);
2338 c669c489 2022-12-30 thomas gotd_imsg_event_add(&proc->iev);
2340 c669c489 2022-12-30 thomas iauth.euid = client->euid;
2341 c669c489 2022-12-30 thomas iauth.egid = client->egid;
2342 c669c489 2022-12-30 thomas iauth.required_auth = required_auth;
2343 c669c489 2022-12-30 thomas iauth.client_id = client->id;
2344 c669c489 2022-12-30 thomas if (gotd_imsg_compose_event(&proc->iev, GOTD_IMSG_AUTHENTICATE,
2345 c669c489 2022-12-30 thomas PROC_GOTD, -1, &iauth, sizeof(iauth)) == -1)
2346 c669c489 2022-12-30 thomas log_warn("imsg compose AUTHENTICATE");
2348 c669c489 2022-12-30 thomas client->auth = proc;
2349 c669c489 2022-12-30 thomas client->required_auth = required_auth;
2350 c669c489 2022-12-30 thomas evtimer_add(&client->tmo, &auth_timeout);
2351 85b37c72 2022-12-30 thomas return NULL;
2354 414e37cb 2022-12-30 thomas static void
2355 414e37cb 2022-12-30 thomas apply_unveil_repo_readonly(const char *repo_path)
2357 414e37cb 2022-12-30 thomas if (unveil(repo_path, "r") == -1)
2358 414e37cb 2022-12-30 thomas fatal("unveil %s", repo_path);
2360 414e37cb 2022-12-30 thomas if (unveil(NULL, NULL) == -1)
2361 414e37cb 2022-12-30 thomas fatal("unveil");
2364 3efd8e31 2022-10-23 thomas static void
2365 3efd8e31 2022-10-23 thomas apply_unveil(void)
2367 3efd8e31 2022-10-23 thomas struct gotd_repo *repo;
2369 85b37c72 2022-12-30 thomas if (unveil(gotd.argv0, "x") == -1)
2370 85b37c72 2022-12-30 thomas fatal("unveil %s", gotd.argv0);
2372 3efd8e31 2022-10-23 thomas TAILQ_FOREACH(repo, &gotd.repos, entry) {
2373 3efd8e31 2022-10-23 thomas if (unveil(repo->path, "rwc") == -1)
2374 3efd8e31 2022-10-23 thomas fatal("unveil %s", repo->path);
2377 3efd8e31 2022-10-23 thomas if (unveil(GOT_TMPDIR_STR, "rwc") == -1)
2378 3efd8e31 2022-10-23 thomas fatal("unveil %s", GOT_TMPDIR_STR);
2380 3efd8e31 2022-10-23 thomas if (unveil(NULL, NULL) == -1)
2381 3efd8e31 2022-10-23 thomas fatal("unveil");
2385 3efd8e31 2022-10-23 thomas main(int argc, char **argv)
2387 3efd8e31 2022-10-23 thomas const struct got_error *error = NULL;
2388 3efd8e31 2022-10-23 thomas int ch, fd = -1, daemonize = 1, verbosity = 0, noaction = 0;
2389 3efd8e31 2022-10-23 thomas const char *confpath = GOTD_CONF_PATH;
2390 3efd8e31 2022-10-23 thomas char *argv0 = argv[0];
2391 3efd8e31 2022-10-23 thomas char title[2048];
2392 ff260661 2022-11-17 thomas gid_t groups[NGROUPS_MAX];
2393 729a7e24 2022-11-17 thomas int ngroups = NGROUPS_MAX;
2394 3efd8e31 2022-10-23 thomas struct passwd *pw = NULL;
2395 3efd8e31 2022-10-23 thomas struct group *gr = NULL;
2396 3efd8e31 2022-10-23 thomas char *repo_path = NULL;
2397 3efd8e31 2022-10-23 thomas enum gotd_procid proc_id = PROC_GOTD;
2398 3efd8e31 2022-10-23 thomas struct event evsigint, evsigterm, evsighup, evsigusr1;
2399 3efd8e31 2022-10-23 thomas int *pack_fds = NULL, *temp_fds = NULL;
2401 3efd8e31 2022-10-23 thomas log_init(1, LOG_DAEMON); /* Log to stderr until daemonized. */
2403 c669c489 2022-12-30 thomas while ((ch = getopt(argc, argv, "Adf:LnP:RvW")) != -1) {
2404 3efd8e31 2022-10-23 thomas switch (ch) {
2405 c669c489 2022-12-30 thomas case 'A':
2406 c669c489 2022-12-30 thomas proc_id = PROC_AUTH;
2408 3efd8e31 2022-10-23 thomas case 'd':
2409 3efd8e31 2022-10-23 thomas daemonize = 0;
2411 3efd8e31 2022-10-23 thomas case 'f':
2412 3efd8e31 2022-10-23 thomas confpath = optarg;
2414 2b3d32a1 2022-12-30 thomas case 'L':
2415 2b3d32a1 2022-12-30 thomas proc_id = PROC_LISTEN;
2417 3efd8e31 2022-10-23 thomas case 'n':
2418 3efd8e31 2022-10-23 thomas noaction = 1;
2420 f7065961 2022-10-27 thomas case 'P':
2421 f7065961 2022-10-27 thomas repo_path = realpath(optarg, NULL);
2422 f7065961 2022-10-27 thomas if (repo_path == NULL)
2423 f7065961 2022-10-27 thomas fatal("realpath '%s'", optarg);
2425 3efd8e31 2022-10-23 thomas case 'R':
2426 3efd8e31 2022-10-23 thomas proc_id = PROC_REPO_READ;
2428 f7065961 2022-10-27 thomas case 'v':
2429 f7065961 2022-10-27 thomas if (verbosity < 3)
2430 f7065961 2022-10-27 thomas verbosity++;
2432 3efd8e31 2022-10-23 thomas case 'W':
2433 3efd8e31 2022-10-23 thomas proc_id = PROC_REPO_WRITE;
2435 3efd8e31 2022-10-23 thomas default:
2436 3efd8e31 2022-10-23 thomas usage();
2440 3efd8e31 2022-10-23 thomas argc -= optind;
2441 3efd8e31 2022-10-23 thomas argv += optind;
2443 3efd8e31 2022-10-23 thomas if (argc != 0)
2444 3efd8e31 2022-10-23 thomas usage();
2446 85b37c72 2022-12-30 thomas /* Require an absolute path in argv[0] for reliable re-exec. */
2447 85b37c72 2022-12-30 thomas if (!got_path_is_absolute(argv0))
2448 85b37c72 2022-12-30 thomas fatalx("bad path \"%s\": must be an absolute path", argv0);
2450 85b37c72 2022-12-30 thomas if (geteuid() && (proc_id == PROC_GOTD || proc_id == PROC_LISTEN))
2451 3efd8e31 2022-10-23 thomas fatalx("need root privileges");
2453 3efd8e31 2022-10-23 thomas log_init(daemonize ? 0 : 1, LOG_DAEMON);
2454 3efd8e31 2022-10-23 thomas log_setverbose(verbosity);
2456 3efd8e31 2022-10-23 thomas if (parse_config(confpath, proc_id, &gotd) != 0)
2457 3efd8e31 2022-10-23 thomas return 1;
2459 85b37c72 2022-12-30 thomas gotd.argv0 = argv0;
2460 85b37c72 2022-12-30 thomas gotd.daemonize = daemonize;
2461 85b37c72 2022-12-30 thomas gotd.verbosity = verbosity;
2462 85b37c72 2022-12-30 thomas gotd.confpath = confpath;
2464 3efd8e31 2022-10-23 thomas if (proc_id == PROC_GOTD &&
2465 3efd8e31 2022-10-23 thomas (gotd.nrepos == 0 || TAILQ_EMPTY(&gotd.repos)))
2466 3efd8e31 2022-10-23 thomas fatalx("no repository defined in configuration file");
2468 3efd8e31 2022-10-23 thomas pw = getpwnam(gotd.user_name);
2469 3efd8e31 2022-10-23 thomas if (pw == NULL)
2470 3e7c54e1 2022-12-30 thomas fatalx("user %s not found", gotd.user_name);
2472 3efd8e31 2022-10-23 thomas if (pw->pw_uid == 0) {
2473 3efd8e31 2022-10-23 thomas fatalx("cannot run %s as %s: the user running %s "
2474 3efd8e31 2022-10-23 thomas "must not be the superuser",
2475 3efd8e31 2022-10-23 thomas getprogname(), pw->pw_name, getprogname());
2478 ff260661 2022-11-17 thomas if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups) == -1)
2479 3efd8e31 2022-10-23 thomas log_warnx("group membership list truncated");
2481 ff260661 2022-11-17 thomas gr = match_group(groups, ngroups, gotd.unix_group_name);
2482 3efd8e31 2022-10-23 thomas if (gr == NULL) {
2483 3efd8e31 2022-10-23 thomas fatalx("cannot start %s: the user running %s "
2484 3efd8e31 2022-10-23 thomas "must be a secondary member of group %s",
2485 3efd8e31 2022-10-23 thomas getprogname(), getprogname(), gotd.unix_group_name);
2487 3efd8e31 2022-10-23 thomas if (gr->gr_gid == pw->pw_gid) {
2488 3efd8e31 2022-10-23 thomas fatalx("cannot start %s: the user running %s "
2489 3efd8e31 2022-10-23 thomas "must be a secondary member of group %s, but "
2490 3efd8e31 2022-10-23 thomas "%s is the user's primary group",
2491 3efd8e31 2022-10-23 thomas getprogname(), getprogname(), gotd.unix_group_name,
2492 3efd8e31 2022-10-23 thomas gotd.unix_group_name);
2495 2b3d32a1 2022-12-30 thomas if (proc_id == PROC_LISTEN &&
2496 3efd8e31 2022-10-23 thomas !got_path_is_absolute(gotd.unix_socket_path))
2497 3efd8e31 2022-10-23 thomas fatalx("bad unix socket path \"%s\": must be an absolute path",
2498 3efd8e31 2022-10-23 thomas gotd.unix_socket_path);
2500 3efd8e31 2022-10-23 thomas if (noaction)
2501 3efd8e31 2022-10-23 thomas return 0;
2503 1eec6e4e 2022-12-06 thomas if (proc_id == PROC_GOTD) {
2504 2b3d32a1 2022-12-30 thomas gotd.pid = getpid();
2505 2b3d32a1 2022-12-30 thomas snprintf(title, sizeof(title), "%s", gotd_proc_names[proc_id]);
2506 2b3d32a1 2022-12-30 thomas start_listener(argv0, confpath, daemonize, verbosity);
2507 2b3d32a1 2022-12-30 thomas arc4random_buf(&clients_hash_key, sizeof(clients_hash_key));
2508 2b3d32a1 2022-12-30 thomas if (daemonize && daemon(1, 0) == -1)
2509 2b3d32a1 2022-12-30 thomas fatal("daemon");
2510 2b3d32a1 2022-12-30 thomas } else if (proc_id == PROC_LISTEN) {
2511 2b3d32a1 2022-12-30 thomas snprintf(title, sizeof(title), "%s", gotd_proc_names[proc_id]);
2512 1eec6e4e 2022-12-06 thomas if (verbosity) {
2513 1eec6e4e 2022-12-06 thomas log_info("socket: %s", gotd.unix_socket_path);
2514 1eec6e4e 2022-12-06 thomas log_info("user: %s", pw->pw_name);
2515 1eec6e4e 2022-12-06 thomas log_info("secondary group: %s", gr->gr_name);
2518 3efd8e31 2022-10-23 thomas fd = unix_socket_listen(gotd.unix_socket_path, pw->pw_uid,
2519 3efd8e31 2022-10-23 thomas gr->gr_gid);
2520 3efd8e31 2022-10-23 thomas if (fd == -1) {
2521 3efd8e31 2022-10-23 thomas fatal("cannot listen on unix socket %s",
2522 3efd8e31 2022-10-23 thomas gotd.unix_socket_path);
2524 414e37cb 2022-12-30 thomas if (daemonize && daemon(0, 0) == -1)
2525 3efd8e31 2022-10-23 thomas fatal("daemon");
2526 c669c489 2022-12-30 thomas } else if (proc_id == PROC_AUTH) {
2527 c669c489 2022-12-30 thomas snprintf(title, sizeof(title), "%s %s",
2528 c669c489 2022-12-30 thomas gotd_proc_names[proc_id], repo_path);
2529 c669c489 2022-12-30 thomas if (daemonize && daemon(0, 0) == -1)
2530 c669c489 2022-12-30 thomas fatal("daemon");
2531 3efd8e31 2022-10-23 thomas } else if (proc_id == PROC_REPO_READ || proc_id == PROC_REPO_WRITE) {
2532 3efd8e31 2022-10-23 thomas error = got_repo_pack_fds_open(&pack_fds);
2533 3efd8e31 2022-10-23 thomas if (error != NULL)
2534 3efd8e31 2022-10-23 thomas fatalx("cannot open pack tempfiles: %s", error->msg);
2535 3efd8e31 2022-10-23 thomas error = got_repo_temp_fds_open(&temp_fds);
2536 3efd8e31 2022-10-23 thomas if (error != NULL)
2537 3efd8e31 2022-10-23 thomas fatalx("cannot open pack tempfiles: %s", error->msg);
2538 3efd8e31 2022-10-23 thomas if (repo_path == NULL)
2539 3efd8e31 2022-10-23 thomas fatalx("repository path not specified");
2540 3efd8e31 2022-10-23 thomas snprintf(title, sizeof(title), "%s %s",
2541 3efd8e31 2022-10-23 thomas gotd_proc_names[proc_id], repo_path);
2542 414e37cb 2022-12-30 thomas if (daemonize && daemon(0, 0) == -1)
2543 3efd8e31 2022-10-23 thomas fatal("daemon");
2545 3efd8e31 2022-10-23 thomas fatal("invalid process id %d", proc_id);
2547 3efd8e31 2022-10-23 thomas setproctitle("%s", title);
2548 3efd8e31 2022-10-23 thomas log_procinit(title);
2550 3efd8e31 2022-10-23 thomas /* Drop root privileges. */
2551 3efd8e31 2022-10-23 thomas if (setgid(pw->pw_gid) == -1)
2552 3efd8e31 2022-10-23 thomas fatal("setgid %d failed", pw->pw_gid);
2553 3efd8e31 2022-10-23 thomas if (setuid(pw->pw_uid) == -1)
2554 3efd8e31 2022-10-23 thomas fatal("setuid %d failed", pw->pw_uid);
2556 3efd8e31 2022-10-23 thomas event_init();
2558 3efd8e31 2022-10-23 thomas switch (proc_id) {
2559 3efd8e31 2022-10-23 thomas case PROC_GOTD:
2560 3efd8e31 2022-10-23 thomas #ifndef PROFILE
2561 c669c489 2022-12-30 thomas if (pledge("stdio rpath wpath cpath proc exec "
2562 85b37c72 2022-12-30 thomas "sendfd recvfd fattr flock unix unveil", NULL) == -1)
2563 3efd8e31 2022-10-23 thomas err(1, "pledge");
2566 2b3d32a1 2022-12-30 thomas case PROC_LISTEN:
2567 2b3d32a1 2022-12-30 thomas #ifndef PROFILE
2568 2b3d32a1 2022-12-30 thomas if (pledge("stdio sendfd unix", NULL) == -1)
2569 2b3d32a1 2022-12-30 thomas err(1, "pledge");
2571 2b3d32a1 2022-12-30 thomas listen_main(title, fd);
2572 2b3d32a1 2022-12-30 thomas /* NOTREACHED */
2574 c669c489 2022-12-30 thomas case PROC_AUTH:
2575 c669c489 2022-12-30 thomas #ifndef PROFILE
2576 c669c489 2022-12-30 thomas if (pledge("stdio getpw", NULL) == -1)
2577 c669c489 2022-12-30 thomas err(1, "pledge");
2579 c669c489 2022-12-30 thomas auth_main(title, &gotd.repos, repo_path);
2580 c669c489 2022-12-30 thomas /* NOTREACHED */
2582 3efd8e31 2022-10-23 thomas case PROC_REPO_READ:
2583 3efd8e31 2022-10-23 thomas #ifndef PROFILE
2584 414e37cb 2022-12-30 thomas if (pledge("stdio rpath recvfd unveil", NULL) == -1)
2585 3efd8e31 2022-10-23 thomas err(1, "pledge");
2587 414e37cb 2022-12-30 thomas apply_unveil_repo_readonly(repo_path);
2588 414e37cb 2022-12-30 thomas repo_read_main(title, repo_path, pack_fds, temp_fds);
2589 3efd8e31 2022-10-23 thomas /* NOTREACHED */
2590 3efd8e31 2022-10-23 thomas exit(0);
2591 3efd8e31 2022-10-23 thomas case PROC_REPO_WRITE:
2592 3efd8e31 2022-10-23 thomas #ifndef PROFILE
2593 414e37cb 2022-12-30 thomas if (pledge("stdio rpath recvfd unveil", NULL) == -1)
2594 3efd8e31 2022-10-23 thomas err(1, "pledge");
2596 414e37cb 2022-12-30 thomas apply_unveil_repo_readonly(repo_path);
2597 414e37cb 2022-12-30 thomas repo_write_main(title, repo_path, pack_fds, temp_fds);
2598 3efd8e31 2022-10-23 thomas /* NOTREACHED */
2599 3efd8e31 2022-10-23 thomas exit(0);
2600 3efd8e31 2022-10-23 thomas default:
2601 3efd8e31 2022-10-23 thomas fatal("invalid process id %d", proc_id);
2604 3efd8e31 2022-10-23 thomas if (proc_id != PROC_GOTD)
2605 3efd8e31 2022-10-23 thomas fatal("invalid process id %d", proc_id);
2607 3efd8e31 2022-10-23 thomas apply_unveil();
2609 3efd8e31 2022-10-23 thomas signal_set(&evsigint, SIGINT, gotd_sighdlr, NULL);
2610 3efd8e31 2022-10-23 thomas signal_set(&evsigterm, SIGTERM, gotd_sighdlr, NULL);
2611 3efd8e31 2022-10-23 thomas signal_set(&evsighup, SIGHUP, gotd_sighdlr, NULL);
2612 3efd8e31 2022-10-23 thomas signal_set(&evsigusr1, SIGUSR1, gotd_sighdlr, NULL);
2613 3efd8e31 2022-10-23 thomas signal(SIGPIPE, SIG_IGN);
2615 3efd8e31 2022-10-23 thomas signal_add(&evsigint, NULL);
2616 3efd8e31 2022-10-23 thomas signal_add(&evsigterm, NULL);
2617 3efd8e31 2022-10-23 thomas signal_add(&evsighup, NULL);
2618 3efd8e31 2022-10-23 thomas signal_add(&evsigusr1, NULL);
2620 85b37c72 2022-12-30 thomas gotd_imsg_event_add(&gotd.listen_proc.iev);
2622 3efd8e31 2022-10-23 thomas event_dispatch();
2624 3efd8e31 2022-10-23 thomas if (pack_fds)
2625 3efd8e31 2022-10-23 thomas got_repo_pack_fds_close(pack_fds);
2626 3efd8e31 2022-10-23 thomas free(repo_path);
2627 3efd8e31 2022-10-23 thomas return 0;
