2 13b2bc37 2022-10-23 stsp * Copyright (c) 2022 Stefan Sperling <stsp@openbsd.org>
4 13b2bc37 2022-10-23 stsp * Permission to use, copy, modify, and distribute this software for any
5 13b2bc37 2022-10-23 stsp * purpose with or without fee is hereby granted, provided that the above
6 13b2bc37 2022-10-23 stsp * copyright notice and this permission notice appear in all copies.
8 13b2bc37 2022-10-23 stsp * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 13b2bc37 2022-10-23 stsp * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 13b2bc37 2022-10-23 stsp * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 13b2bc37 2022-10-23 stsp * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 13b2bc37 2022-10-23 stsp * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 13b2bc37 2022-10-23 stsp * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 13b2bc37 2022-10-23 stsp * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 13b2bc37 2022-10-23 stsp #include <sys/queue.h>
18 13b2bc37 2022-10-23 stsp #include <sys/tree.h>
19 13b2bc37 2022-10-23 stsp #include <sys/time.h>
20 13b2bc37 2022-10-23 stsp #include <sys/types.h>
21 13b2bc37 2022-10-23 stsp #include <sys/stat.h>
22 13b2bc37 2022-10-23 stsp #include <sys/socket.h>
23 13b2bc37 2022-10-23 stsp #include <sys/un.h>
24 13b2bc37 2022-10-23 stsp #include <sys/wait.h>
26 13b2bc37 2022-10-23 stsp #include <fcntl.h>
27 13b2bc37 2022-10-23 stsp #include <err.h>
28 13b2bc37 2022-10-23 stsp #include <errno.h>
29 13b2bc37 2022-10-23 stsp #include <event.h>
30 13b2bc37 2022-10-23 stsp #include <limits.h>
31 13b2bc37 2022-10-23 stsp #include <pwd.h>
32 13b2bc37 2022-10-23 stsp #include <grp.h>
33 13b2bc37 2022-10-23 stsp #include <imsg.h>
34 13b2bc37 2022-10-23 stsp #include <sha1.h>
35 13b2bc37 2022-10-23 stsp #include <signal.h>
36 13b2bc37 2022-10-23 stsp #include <siphash.h>
37 13b2bc37 2022-10-23 stsp #include <stdarg.h>
38 13b2bc37 2022-10-23 stsp #include <stdio.h>
39 13b2bc37 2022-10-23 stsp #include <stdlib.h>
40 13b2bc37 2022-10-23 stsp #include <string.h>
41 13b2bc37 2022-10-23 stsp #include <syslog.h>
42 13b2bc37 2022-10-23 stsp #include <unistd.h>
44 13b2bc37 2022-10-23 stsp #include "got_error.h"
45 13b2bc37 2022-10-23 stsp #include "got_opentemp.h"
46 13b2bc37 2022-10-23 stsp #include "got_path.h"
47 13b2bc37 2022-10-23 stsp #include "got_repository.h"
48 13b2bc37 2022-10-23 stsp #include "got_object.h"
49 13b2bc37 2022-10-23 stsp #include "got_reference.h"
51 13b2bc37 2022-10-23 stsp #include "got_lib_delta.h"
52 13b2bc37 2022-10-23 stsp #include "got_lib_object.h"
53 13b2bc37 2022-10-23 stsp #include "got_lib_object_cache.h"
54 13b2bc37 2022-10-23 stsp #include "got_lib_sha1.h"
55 13b2bc37 2022-10-23 stsp #include "got_lib_gitproto.h"
56 13b2bc37 2022-10-23 stsp #include "got_lib_pack.h"
57 13b2bc37 2022-10-23 stsp #include "got_lib_repository.h"
59 13b2bc37 2022-10-23 stsp #include "gotd.h"
60 13b2bc37 2022-10-23 stsp #include "log.h"
61 d93ecf7d 2022-12-14 stsp #include "listen.h"
62 0ccf3acb 2022-11-16 stsp #include "auth.h"
63 13b2bc37 2022-10-23 stsp #include "repo_read.h"
64 13b2bc37 2022-10-23 stsp #include "repo_write.h"
66 13b2bc37 2022-10-23 stsp #ifndef nitems
67 13b2bc37 2022-10-23 stsp #define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
70 13b2bc37 2022-10-23 stsp struct gotd_client {
71 13b2bc37 2022-10-23 stsp STAILQ_ENTRY(gotd_client) entry;
72 13b2bc37 2022-10-23 stsp enum gotd_client_state state;
73 13b2bc37 2022-10-23 stsp struct gotd_client_capability *capabilities;
74 13b2bc37 2022-10-23 stsp size_t ncapa_alloc;
75 13b2bc37 2022-10-23 stsp size_t ncapabilities;
76 13b2bc37 2022-10-23 stsp uint32_t id;
78 13b2bc37 2022-10-23 stsp int delta_cache_fd;
79 13b2bc37 2022-10-23 stsp struct gotd_imsgev iev;
80 13b2bc37 2022-10-23 stsp struct event tmo;
83 13b2bc37 2022-10-23 stsp struct gotd_child_proc *repo_read;
84 13b2bc37 2022-10-23 stsp struct gotd_child_proc *repo_write;
85 5e25db14 2022-12-29 stsp struct gotd_child_proc *auth;
86 5e25db14 2022-12-29 stsp int required_auth;
87 13b2bc37 2022-10-23 stsp char *packfile_path;
88 13b2bc37 2022-10-23 stsp char *packidx_path;
89 13b2bc37 2022-10-23 stsp int nref_updates;
91 13b2bc37 2022-10-23 stsp STAILQ_HEAD(gotd_clients, gotd_client);
93 13b2bc37 2022-10-23 stsp static struct gotd_clients gotd_clients[GOTD_CLIENT_TABLE_SIZE];
94 13b2bc37 2022-10-23 stsp static SIPHASH_KEY clients_hash_key;
95 13b2bc37 2022-10-23 stsp volatile int client_cnt;
96 13b2bc37 2022-10-23 stsp static struct timeval timeout = { 3600, 0 };
97 ef4e2f01 2022-12-29 stsp static struct timeval auth_timeout = { 5, 0 };
98 13b2bc37 2022-10-23 stsp static struct gotd gotd;
100 13b2bc37 2022-10-23 stsp void gotd_sighdlr(int sig, short event, void *arg);
101 f1752522 2022-10-29 stsp static void gotd_shutdown(void);
102 b50a2b46 2022-12-29 stsp static const struct got_error *start_repo_child(struct gotd_client *,
103 b50a2b46 2022-12-29 stsp enum gotd_procid, struct gotd_repo *, char *, const char *, int, int);
104 5e25db14 2022-12-29 stsp static const struct got_error *start_auth_child(struct gotd_client *, int,
105 5e25db14 2022-12-29 stsp struct gotd_repo *, char *, const char *, int, int);
106 b50a2b46 2022-12-29 stsp static void kill_proc(struct gotd_child_proc *, int);
108 13b2bc37 2022-10-23 stsp __dead static void
111 88dec179 2022-10-24 stsp fprintf(stderr, "usage: %s [-dv] [-f config-file]\n", getprogname());
116 13b2bc37 2022-10-23 stsp unix_socket_listen(const char *unix_socket_path, uid_t uid, gid_t gid)
118 13b2bc37 2022-10-23 stsp struct sockaddr_un sun;
119 13b2bc37 2022-10-23 stsp int fd = -1;
120 13b2bc37 2022-10-23 stsp mode_t old_umask, mode;
122 13b2bc37 2022-10-23 stsp fd = socket(AF_UNIX, SOCK_STREAM | SOCK_NONBLOCK| SOCK_CLOEXEC, 0);
123 13b2bc37 2022-10-23 stsp if (fd == -1) {
124 13b2bc37 2022-10-23 stsp log_warn("socket");
128 13b2bc37 2022-10-23 stsp sun.sun_family = AF_UNIX;
129 13b2bc37 2022-10-23 stsp if (strlcpy(sun.sun_path, unix_socket_path,
130 13b2bc37 2022-10-23 stsp sizeof(sun.sun_path)) >= sizeof(sun.sun_path)) {
131 13b2bc37 2022-10-23 stsp log_warnx("%s: name too long", unix_socket_path);
136 13b2bc37 2022-10-23 stsp if (unlink(unix_socket_path) == -1) {
137 13b2bc37 2022-10-23 stsp if (errno != ENOENT) {
138 13b2bc37 2022-10-23 stsp log_warn("unlink %s", unix_socket_path);
144 13b2bc37 2022-10-23 stsp old_umask = umask(S_IXUSR|S_IXGRP|S_IWOTH|S_IROTH|S_IXOTH);
145 13b2bc37 2022-10-23 stsp mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP;
147 13b2bc37 2022-10-23 stsp if (bind(fd, (struct sockaddr *)&sun, sizeof(sun)) == -1) {
148 13b2bc37 2022-10-23 stsp log_warn("bind: %s", unix_socket_path);
150 13b2bc37 2022-10-23 stsp umask(old_umask);
154 13b2bc37 2022-10-23 stsp umask(old_umask);
156 13b2bc37 2022-10-23 stsp if (chmod(unix_socket_path, mode) == -1) {
157 13b2bc37 2022-10-23 stsp log_warn("chmod %o %s", mode, unix_socket_path);
159 13b2bc37 2022-10-23 stsp unlink(unix_socket_path);
163 13b2bc37 2022-10-23 stsp if (chown(unix_socket_path, uid, gid) == -1) {
164 13b2bc37 2022-10-23 stsp log_warn("chown %s uid=%d gid=%d", unix_socket_path, uid, gid);
166 13b2bc37 2022-10-23 stsp unlink(unix_socket_path);
170 13b2bc37 2022-10-23 stsp if (listen(fd, GOTD_UNIX_SOCKET_BACKLOG) == -1) {
171 13b2bc37 2022-10-23 stsp log_warn("listen");
173 13b2bc37 2022-10-23 stsp unlink(unix_socket_path);
180 13b2bc37 2022-10-23 stsp static struct group *
181 13b2bc37 2022-10-23 stsp match_group(gid_t *groups, int ngroups, const char *unix_group_name)
183 13b2bc37 2022-10-23 stsp struct group *gr;
186 13b2bc37 2022-10-23 stsp for (i = 0; i < ngroups; i++) {
187 13b2bc37 2022-10-23 stsp gr = getgrgid(groups[i]);
188 13b2bc37 2022-10-23 stsp if (gr == NULL) {
189 13b2bc37 2022-10-23 stsp log_warn("getgrgid %d", groups[i]);
192 13b2bc37 2022-10-23 stsp if (strcmp(gr->gr_name, unix_group_name) == 0)
196 13b2bc37 2022-10-23 stsp return NULL;
199 13b2bc37 2022-10-23 stsp static uint64_t
200 13b2bc37 2022-10-23 stsp client_hash(uint32_t client_id)
202 13b2bc37 2022-10-23 stsp return SipHash24(&clients_hash_key, &client_id, sizeof(client_id));
205 13b2bc37 2022-10-23 stsp static void
206 13b2bc37 2022-10-23 stsp add_client(struct gotd_client *client)
208 13b2bc37 2022-10-23 stsp uint64_t slot = client_hash(client->id) % nitems(gotd_clients);
209 13b2bc37 2022-10-23 stsp STAILQ_INSERT_HEAD(&gotd_clients[slot], client, entry);
210 13b2bc37 2022-10-23 stsp client_cnt++;
213 13b2bc37 2022-10-23 stsp static struct gotd_client *
214 13b2bc37 2022-10-23 stsp find_client(uint32_t client_id)
216 13b2bc37 2022-10-23 stsp uint64_t slot;
217 13b2bc37 2022-10-23 stsp struct gotd_client *c;
219 13b2bc37 2022-10-23 stsp slot = client_hash(client_id) % nitems(gotd_clients);
220 13b2bc37 2022-10-23 stsp STAILQ_FOREACH(c, &gotd_clients[slot], entry) {
221 13b2bc37 2022-10-23 stsp if (c->id == client_id)
225 13b2bc37 2022-10-23 stsp return NULL;
228 13b2bc37 2022-10-23 stsp static struct gotd_child_proc *
229 13b2bc37 2022-10-23 stsp get_client_proc(struct gotd_client *client)
231 13b2bc37 2022-10-23 stsp if (client->repo_read && client->repo_write) {
232 13b2bc37 2022-10-23 stsp fatalx("uid %d is reading and writing in the same session",
233 13b2bc37 2022-10-23 stsp client->euid);
234 13b2bc37 2022-10-23 stsp /* NOTREACHED */
237 13b2bc37 2022-10-23 stsp if (client->repo_read)
238 13b2bc37 2022-10-23 stsp return client->repo_read;
239 13b2bc37 2022-10-23 stsp else if (client->repo_write)
240 13b2bc37 2022-10-23 stsp return client->repo_write;
242 b50a2b46 2022-12-29 stsp return NULL;
245 b50a2b46 2022-12-29 stsp static struct gotd_client *
246 b50a2b46 2022-12-29 stsp find_client_by_proc_fd(int fd)
248 b50a2b46 2022-12-29 stsp uint64_t slot;
250 b50a2b46 2022-12-29 stsp for (slot = 0; slot < nitems(gotd_clients); slot++) {
251 b50a2b46 2022-12-29 stsp struct gotd_client *c;
253 b50a2b46 2022-12-29 stsp STAILQ_FOREACH(c, &gotd_clients[slot], entry) {
254 b50a2b46 2022-12-29 stsp struct gotd_child_proc *proc = get_client_proc(c);
255 b50a2b46 2022-12-29 stsp if (proc && proc->iev.ibuf.fd == fd)
257 5e25db14 2022-12-29 stsp if (c->auth && c->auth->iev.ibuf.fd == fd)
262 13b2bc37 2022-10-23 stsp return NULL;
266 13b2bc37 2022-10-23 stsp client_is_reading(struct gotd_client *client)
268 13b2bc37 2022-10-23 stsp return client->repo_read != NULL;
272 13b2bc37 2022-10-23 stsp client_is_writing(struct gotd_client *client)
274 13b2bc37 2022-10-23 stsp return client->repo_write != NULL;
277 13b2bc37 2022-10-23 stsp static const struct got_error *
278 13b2bc37 2022-10-23 stsp ensure_client_is_reading(struct gotd_client *client)
280 13b2bc37 2022-10-23 stsp if (!client_is_reading(client)) {
281 13b2bc37 2022-10-23 stsp return got_error_fmt(GOT_ERR_BAD_PACKET,
282 13b2bc37 2022-10-23 stsp "uid %d made a read-request but is not reading from "
283 13b2bc37 2022-10-23 stsp "a repository", client->euid);
286 13b2bc37 2022-10-23 stsp return NULL;
289 13b2bc37 2022-10-23 stsp static const struct got_error *
290 13b2bc37 2022-10-23 stsp ensure_client_is_writing(struct gotd_client *client)
292 13b2bc37 2022-10-23 stsp if (!client_is_writing(client)) {
293 13b2bc37 2022-10-23 stsp return got_error_fmt(GOT_ERR_BAD_PACKET,
294 13b2bc37 2022-10-23 stsp "uid %d made a write-request but is not writing to "
295 13b2bc37 2022-10-23 stsp "a repository", client->euid);
298 13b2bc37 2022-10-23 stsp return NULL;
301 13b2bc37 2022-10-23 stsp static const struct got_error *
302 13b2bc37 2022-10-23 stsp ensure_client_is_not_writing(struct gotd_client *client)
304 13b2bc37 2022-10-23 stsp if (client_is_writing(client)) {
305 13b2bc37 2022-10-23 stsp return got_error_fmt(GOT_ERR_BAD_PACKET,
306 13b2bc37 2022-10-23 stsp "uid %d made a read-request but is writing to "
307 13b2bc37 2022-10-23 stsp "a repository", client->euid);
310 13b2bc37 2022-10-23 stsp return NULL;
313 13b2bc37 2022-10-23 stsp static const struct got_error *
314 13b2bc37 2022-10-23 stsp ensure_client_is_not_reading(struct gotd_client *client)
316 13b2bc37 2022-10-23 stsp if (client_is_reading(client)) {
317 13b2bc37 2022-10-23 stsp return got_error_fmt(GOT_ERR_BAD_PACKET,
318 13b2bc37 2022-10-23 stsp "uid %d made a write-request but is reading from "
319 13b2bc37 2022-10-23 stsp "a repository", client->euid);
322 13b2bc37 2022-10-23 stsp return NULL;
325 b50a2b46 2022-12-29 stsp static void
326 5e25db14 2022-12-29 stsp wait_for_child(pid_t child_pid)
329 b50a2b46 2022-12-29 stsp int status;
331 5e25db14 2022-12-29 stsp log_debug("waiting for child PID %ld to terminate",
332 5e25db14 2022-12-29 stsp (long)child_pid);
335 5e25db14 2022-12-29 stsp pid = waitpid(child_pid, &status, WNOHANG);
336 b50a2b46 2022-12-29 stsp if (pid == -1) {
337 b50a2b46 2022-12-29 stsp if (errno != EINTR && errno != ECHILD)
338 b50a2b46 2022-12-29 stsp fatal("wait");
339 b50a2b46 2022-12-29 stsp } else if (WIFSIGNALED(status)) {
340 b50a2b46 2022-12-29 stsp log_warnx("child PID %ld terminated; signal %d",
341 b50a2b46 2022-12-29 stsp (long)pid, WTERMSIG(status));
343 b50a2b46 2022-12-29 stsp } while (pid != -1 || (pid == -1 && errno == EINTR));
346 13b2bc37 2022-10-23 stsp static void
347 5e25db14 2022-12-29 stsp kill_auth_proc(struct gotd_client *client)
349 5e25db14 2022-12-29 stsp struct gotd_child_proc *proc;
351 5e25db14 2022-12-29 stsp if (client->auth == NULL)
354 5e25db14 2022-12-29 stsp proc = client->auth;
355 5e25db14 2022-12-29 stsp client->auth = NULL;
357 5e25db14 2022-12-29 stsp event_del(&proc->iev.ev);
358 5e25db14 2022-12-29 stsp msgbuf_clear(&proc->iev.ibuf.w);
359 5e25db14 2022-12-29 stsp close(proc->iev.ibuf.fd);
360 5e25db14 2022-12-29 stsp kill_proc(proc, 0);
361 5e25db14 2022-12-29 stsp wait_for_child(proc->pid);
362 5e25db14 2022-12-29 stsp free(proc);
365 5e25db14 2022-12-29 stsp static void
366 13b2bc37 2022-10-23 stsp disconnect(struct gotd_client *client)
368 13b2bc37 2022-10-23 stsp struct gotd_imsg_disconnect idisconnect;
369 13b2bc37 2022-10-23 stsp struct gotd_child_proc *proc = get_client_proc(client);
370 b50a2b46 2022-12-29 stsp struct gotd_child_proc *listen_proc = &gotd.listen_proc;
371 13b2bc37 2022-10-23 stsp uint64_t slot;
373 13b2bc37 2022-10-23 stsp log_debug("uid %d: disconnecting", client->euid);
375 5e25db14 2022-12-29 stsp kill_auth_proc(client);
377 13b2bc37 2022-10-23 stsp idisconnect.client_id = client->id;
378 f1752522 2022-10-29 stsp if (proc) {
379 f1752522 2022-10-29 stsp if (gotd_imsg_compose_event(&proc->iev,
380 f1752522 2022-10-29 stsp GOTD_IMSG_DISCONNECT, PROC_GOTD, -1,
381 f1752522 2022-10-29 stsp &idisconnect, sizeof(idisconnect)) == -1)
382 f1752522 2022-10-29 stsp log_warn("imsg compose DISCONNECT");
384 b50a2b46 2022-12-29 stsp msgbuf_clear(&proc->iev.ibuf.w);
385 b50a2b46 2022-12-29 stsp close(proc->iev.ibuf.fd);
386 b50a2b46 2022-12-29 stsp kill_proc(proc, 0);
387 5e25db14 2022-12-29 stsp wait_for_child(proc->pid);
388 b50a2b46 2022-12-29 stsp free(proc);
389 b50a2b46 2022-12-29 stsp proc = NULL;
392 d93ecf7d 2022-12-14 stsp if (gotd_imsg_compose_event(&listen_proc->iev,
393 d93ecf7d 2022-12-14 stsp GOTD_IMSG_DISCONNECT, PROC_GOTD, -1,
394 d93ecf7d 2022-12-14 stsp &idisconnect, sizeof(idisconnect)) == -1)
395 d93ecf7d 2022-12-14 stsp log_warn("imsg compose DISCONNECT");
397 13b2bc37 2022-10-23 stsp slot = client_hash(client->id) % nitems(gotd_clients);
398 13b2bc37 2022-10-23 stsp STAILQ_REMOVE(&gotd_clients[slot], client, gotd_client, entry);
399 13b2bc37 2022-10-23 stsp imsg_clear(&client->iev.ibuf);
400 13b2bc37 2022-10-23 stsp event_del(&client->iev.ev);
401 13b2bc37 2022-10-23 stsp evtimer_del(&client->tmo);
402 13b2bc37 2022-10-23 stsp close(client->fd);
403 13b2bc37 2022-10-23 stsp if (client->delta_cache_fd != -1)
404 13b2bc37 2022-10-23 stsp close(client->delta_cache_fd);
405 13b2bc37 2022-10-23 stsp if (client->packfile_path) {
406 13b2bc37 2022-10-23 stsp if (unlink(client->packfile_path) == -1 && errno != ENOENT)
407 13b2bc37 2022-10-23 stsp log_warn("unlink %s: ", client->packfile_path);
408 13b2bc37 2022-10-23 stsp free(client->packfile_path);
410 13b2bc37 2022-10-23 stsp if (client->packidx_path) {
411 13b2bc37 2022-10-23 stsp if (unlink(client->packidx_path) == -1 && errno != ENOENT)
412 13b2bc37 2022-10-23 stsp log_warn("unlink %s: ", client->packidx_path);
413 13b2bc37 2022-10-23 stsp free(client->packidx_path);
415 13b2bc37 2022-10-23 stsp free(client->capabilities);
416 13b2bc37 2022-10-23 stsp free(client);
417 13b2bc37 2022-10-23 stsp client_cnt--;
420 13b2bc37 2022-10-23 stsp static void
421 13b2bc37 2022-10-23 stsp disconnect_on_error(struct gotd_client *client, const struct got_error *err)
423 13b2bc37 2022-10-23 stsp struct imsgbuf ibuf;
425 13b2bc37 2022-10-23 stsp log_warnx("uid %d: %s", client->euid, err->msg);
426 13b2bc37 2022-10-23 stsp if (err->code != GOT_ERR_EOF) {
427 13b2bc37 2022-10-23 stsp imsg_init(&ibuf, client->fd);
428 13b2bc37 2022-10-23 stsp gotd_imsg_send_error(&ibuf, 0, PROC_GOTD, err);
429 13b2bc37 2022-10-23 stsp imsg_clear(&ibuf);
431 13b2bc37 2022-10-23 stsp disconnect(client);
434 f1752522 2022-10-29 stsp static const struct got_error *
435 f1752522 2022-10-29 stsp send_repo_info(struct gotd_imsgev *iev, struct gotd_repo *repo)
437 f1752522 2022-10-29 stsp const struct got_error *err = NULL;
438 f1752522 2022-10-29 stsp struct gotd_imsg_info_repo irepo;
440 f1752522 2022-10-29 stsp memset(&irepo, 0, sizeof(irepo));
442 f1752522 2022-10-29 stsp if (strlcpy(irepo.repo_name, repo->name, sizeof(irepo.repo_name))
443 f1752522 2022-10-29 stsp >= sizeof(irepo.repo_name))
444 f1752522 2022-10-29 stsp return got_error_msg(GOT_ERR_NO_SPACE, "repo name too long");
445 f1752522 2022-10-29 stsp if (strlcpy(irepo.repo_path, repo->path, sizeof(irepo.repo_path))
446 f1752522 2022-10-29 stsp >= sizeof(irepo.repo_path))
447 f1752522 2022-10-29 stsp return got_error_msg(GOT_ERR_NO_SPACE, "repo path too long");
449 f1752522 2022-10-29 stsp if (gotd_imsg_compose_event(iev, GOTD_IMSG_INFO_REPO, PROC_GOTD, -1,
450 f1752522 2022-10-29 stsp &irepo, sizeof(irepo)) == -1) {
451 f1752522 2022-10-29 stsp err = got_error_from_errno("imsg compose INFO_REPO");
453 f1752522 2022-10-29 stsp return err;
456 f1752522 2022-10-29 stsp return NULL;
459 f1752522 2022-10-29 stsp static const struct got_error *
460 f1752522 2022-10-29 stsp send_capability(struct gotd_client_capability *capa, struct gotd_imsgev* iev)
462 f1752522 2022-10-29 stsp const struct got_error *err = NULL;
463 f1752522 2022-10-29 stsp struct gotd_imsg_capability icapa;
464 f1752522 2022-10-29 stsp size_t len;
465 f1752522 2022-10-29 stsp struct ibuf *wbuf;
467 f1752522 2022-10-29 stsp memset(&icapa, 0, sizeof(icapa));
469 f1752522 2022-10-29 stsp icapa.key_len = strlen(capa->key);
470 f1752522 2022-10-29 stsp len = sizeof(icapa) + icapa.key_len;
471 f1752522 2022-10-29 stsp if (capa->value) {
472 f1752522 2022-10-29 stsp icapa.value_len = strlen(capa->value);
473 f1752522 2022-10-29 stsp len += icapa.value_len;
476 f1752522 2022-10-29 stsp wbuf = imsg_create(&iev->ibuf, GOTD_IMSG_CAPABILITY, 0, 0, len);
477 f1752522 2022-10-29 stsp if (wbuf == NULL) {
478 f1752522 2022-10-29 stsp err = got_error_from_errno("imsg_create CAPABILITY");
479 f1752522 2022-10-29 stsp return err;
482 f1752522 2022-10-29 stsp if (imsg_add(wbuf, &icapa, sizeof(icapa)) == -1)
483 f1752522 2022-10-29 stsp return got_error_from_errno("imsg_add CAPABILITY");
484 f1752522 2022-10-29 stsp if (imsg_add(wbuf, capa->key, icapa.key_len) == -1)
485 f1752522 2022-10-29 stsp return got_error_from_errno("imsg_add CAPABILITY");
486 f1752522 2022-10-29 stsp if (capa->value) {
487 f1752522 2022-10-29 stsp if (imsg_add(wbuf, capa->value, icapa.value_len) == -1)
488 f1752522 2022-10-29 stsp return got_error_from_errno("imsg_add CAPABILITY");
491 f1752522 2022-10-29 stsp wbuf->fd = -1;
492 f1752522 2022-10-29 stsp imsg_close(&iev->ibuf, wbuf);
494 f1752522 2022-10-29 stsp gotd_imsg_event_add(iev);
496 f1752522 2022-10-29 stsp return NULL;
499 f1752522 2022-10-29 stsp static const struct got_error *
500 f1752522 2022-10-29 stsp send_client_info(struct gotd_imsgev *iev, struct gotd_client *client)
502 f1752522 2022-10-29 stsp const struct got_error *err = NULL;
503 f1752522 2022-10-29 stsp struct gotd_imsg_info_client iclient;
504 f1752522 2022-10-29 stsp struct gotd_child_proc *proc;
507 f1752522 2022-10-29 stsp memset(&iclient, 0, sizeof(iclient));
508 f1752522 2022-10-29 stsp iclient.euid = client->euid;
509 f1752522 2022-10-29 stsp iclient.egid = client->egid;
511 f1752522 2022-10-29 stsp proc = get_client_proc(client);
512 f1752522 2022-10-29 stsp if (proc) {
513 eec68231 2022-12-14 stsp if (strlcpy(iclient.repo_name, proc->repo_path,
514 f1752522 2022-10-29 stsp sizeof(iclient.repo_name)) >= sizeof(iclient.repo_name)) {
515 f1752522 2022-10-29 stsp return got_error_msg(GOT_ERR_NO_SPACE,
516 f1752522 2022-10-29 stsp "repo name too long");
518 f1752522 2022-10-29 stsp if (client_is_writing(client))
519 f1752522 2022-10-29 stsp iclient.is_writing = 1;
522 f1752522 2022-10-29 stsp iclient.state = client->state;
523 f1752522 2022-10-29 stsp iclient.ncapabilities = client->ncapabilities;
525 f1752522 2022-10-29 stsp if (gotd_imsg_compose_event(iev, GOTD_IMSG_INFO_CLIENT, PROC_GOTD, -1,
526 f1752522 2022-10-29 stsp &iclient, sizeof(iclient)) == -1) {
527 f1752522 2022-10-29 stsp err = got_error_from_errno("imsg compose INFO_CLIENT");
529 f1752522 2022-10-29 stsp return err;
532 f1752522 2022-10-29 stsp for (i = 0; i < client->ncapabilities; i++) {
533 f1752522 2022-10-29 stsp struct gotd_client_capability *capa;
534 f1752522 2022-10-29 stsp capa = &client->capabilities[i];
535 f1752522 2022-10-29 stsp err = send_capability(capa, iev);
537 f1752522 2022-10-29 stsp return err;
540 f1752522 2022-10-29 stsp return NULL;
543 f1752522 2022-10-29 stsp static const struct got_error *
544 f1752522 2022-10-29 stsp send_info(struct gotd_client *client)
546 f1752522 2022-10-29 stsp const struct got_error *err = NULL;
547 f1752522 2022-10-29 stsp struct gotd_imsg_info info;
548 f1752522 2022-10-29 stsp uint64_t slot;
549 f1752522 2022-10-29 stsp struct gotd_repo *repo;
551 f1752522 2022-10-29 stsp info.pid = gotd.pid;
552 f1752522 2022-10-29 stsp info.verbosity = gotd.verbosity;
553 f1752522 2022-10-29 stsp info.nrepos = gotd.nrepos;
554 f1752522 2022-10-29 stsp info.nclients = client_cnt - 1;
556 f1752522 2022-10-29 stsp if (gotd_imsg_compose_event(&client->iev, GOTD_IMSG_INFO, PROC_GOTD, -1,
557 f1752522 2022-10-29 stsp &info, sizeof(info)) == -1) {
558 f1752522 2022-10-29 stsp err = got_error_from_errno("imsg compose INFO");
560 f1752522 2022-10-29 stsp return err;
563 f1752522 2022-10-29 stsp TAILQ_FOREACH(repo, &gotd.repos, entry) {
564 f1752522 2022-10-29 stsp err = send_repo_info(&client->iev, repo);
566 f1752522 2022-10-29 stsp return err;
569 f1752522 2022-10-29 stsp for (slot = 0; slot < nitems(gotd_clients); slot++) {
570 f1752522 2022-10-29 stsp struct gotd_client *c;
571 f1752522 2022-10-29 stsp STAILQ_FOREACH(c, &gotd_clients[slot], entry) {
572 f1752522 2022-10-29 stsp if (c->id == client->id)
574 f1752522 2022-10-29 stsp err = send_client_info(&client->iev, c);
576 f1752522 2022-10-29 stsp return err;
580 f1752522 2022-10-29 stsp return NULL;
583 f1752522 2022-10-29 stsp static const struct got_error *
584 f1752522 2022-10-29 stsp stop_gotd(struct gotd_client *client)
587 f1752522 2022-10-29 stsp if (client->euid != 0)
588 f1752522 2022-10-29 stsp return got_error_set_errno(EPERM, "stop");
590 f1752522 2022-10-29 stsp gotd_shutdown();
591 f1752522 2022-10-29 stsp /* NOTREACHED */
592 0ccf3acb 2022-11-16 stsp return NULL;
595 0ccf3acb 2022-11-16 stsp static struct gotd_repo *
596 0ccf3acb 2022-11-16 stsp find_repo_by_name(const char *repo_name)
598 0ccf3acb 2022-11-16 stsp struct gotd_repo *repo;
599 0ccf3acb 2022-11-16 stsp size_t namelen;
601 0ccf3acb 2022-11-16 stsp TAILQ_FOREACH(repo, &gotd.repos, entry) {
602 0ccf3acb 2022-11-16 stsp namelen = strlen(repo->name);
603 0ccf3acb 2022-11-16 stsp if (strncmp(repo->name, repo_name, namelen) != 0)
605 0ccf3acb 2022-11-16 stsp if (repo_name[namelen] == '\0' ||
606 0ccf3acb 2022-11-16 stsp strcmp(&repo_name[namelen], ".git") == 0)
607 0ccf3acb 2022-11-16 stsp return repo;
610 13b2bc37 2022-10-23 stsp return NULL;
613 13b2bc37 2022-10-23 stsp static const struct got_error *
614 b50a2b46 2022-12-29 stsp start_client_session(struct gotd_client *client, struct imsg *imsg)
616 13b2bc37 2022-10-23 stsp const struct got_error *err;
617 13b2bc37 2022-10-23 stsp struct gotd_imsg_list_refs ireq;
618 0ccf3acb 2022-11-16 stsp struct gotd_repo *repo = NULL;
619 13b2bc37 2022-10-23 stsp size_t datalen;
621 13b2bc37 2022-10-23 stsp log_debug("list-refs request from uid %d", client->euid);
623 13b2bc37 2022-10-23 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
624 13b2bc37 2022-10-23 stsp if (datalen != sizeof(ireq))
625 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
627 13b2bc37 2022-10-23 stsp memcpy(&ireq, imsg->data, datalen);
629 13b2bc37 2022-10-23 stsp if (ireq.client_is_reading) {
630 13b2bc37 2022-10-23 stsp err = ensure_client_is_not_writing(client);
632 13b2bc37 2022-10-23 stsp return err;
633 0ccf3acb 2022-11-16 stsp repo = find_repo_by_name(ireq.repo_name);
634 0ccf3acb 2022-11-16 stsp if (repo == NULL)
635 0ccf3acb 2022-11-16 stsp return got_error(GOT_ERR_NOT_GIT_REPO);
636 5e25db14 2022-12-29 stsp err = start_auth_child(client, GOTD_AUTH_READ, repo,
637 b50a2b46 2022-12-29 stsp gotd.argv0, gotd.confpath, gotd.daemonize,
638 b50a2b46 2022-12-29 stsp gotd.verbosity);
640 b50a2b46 2022-12-29 stsp return err;
642 13b2bc37 2022-10-23 stsp err = ensure_client_is_not_reading(client);
644 0ccf3acb 2022-11-16 stsp return err;
645 0ccf3acb 2022-11-16 stsp repo = find_repo_by_name(ireq.repo_name);
646 0ccf3acb 2022-11-16 stsp if (repo == NULL)
647 0ccf3acb 2022-11-16 stsp return got_error(GOT_ERR_NOT_GIT_REPO);
648 5e25db14 2022-12-29 stsp err = start_auth_child(client,
649 5e25db14 2022-12-29 stsp GOTD_AUTH_READ | GOTD_AUTH_WRITE,
650 5e25db14 2022-12-29 stsp repo, gotd.argv0, gotd.confpath, gotd.daemonize,
651 b50a2b46 2022-12-29 stsp gotd.verbosity);
653 b50a2b46 2022-12-29 stsp return err;
656 5e25db14 2022-12-29 stsp /* Flow continues upon authentication successs/failure or timeout. */
657 13b2bc37 2022-10-23 stsp return NULL;
660 13b2bc37 2022-10-23 stsp static const struct got_error *
661 13b2bc37 2022-10-23 stsp forward_want(struct gotd_client *client, struct imsg *imsg)
663 13b2bc37 2022-10-23 stsp struct gotd_imsg_want ireq;
664 13b2bc37 2022-10-23 stsp struct gotd_imsg_want iwant;
665 13b2bc37 2022-10-23 stsp size_t datalen;
667 13b2bc37 2022-10-23 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
668 13b2bc37 2022-10-23 stsp if (datalen != sizeof(ireq))
669 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
671 13b2bc37 2022-10-23 stsp memcpy(&ireq, imsg->data, datalen);
673 13b2bc37 2022-10-23 stsp memset(&iwant, 0, sizeof(iwant));
674 13b2bc37 2022-10-23 stsp memcpy(iwant.object_id, ireq.object_id, SHA1_DIGEST_LENGTH);
675 13b2bc37 2022-10-23 stsp iwant.client_id = client->id;
677 13b2bc37 2022-10-23 stsp if (gotd_imsg_compose_event(&client->repo_read->iev, GOTD_IMSG_WANT,
678 13b2bc37 2022-10-23 stsp PROC_GOTD, -1, &iwant, sizeof(iwant)) == -1)
679 13b2bc37 2022-10-23 stsp return got_error_from_errno("imsg compose WANT");
681 13b2bc37 2022-10-23 stsp return NULL;
684 13b2bc37 2022-10-23 stsp static const struct got_error *
685 13b2bc37 2022-10-23 stsp forward_ref_update(struct gotd_client *client, struct imsg *imsg)
687 13b2bc37 2022-10-23 stsp const struct got_error *err = NULL;
688 13b2bc37 2022-10-23 stsp struct gotd_imsg_ref_update ireq;
689 13b2bc37 2022-10-23 stsp struct gotd_imsg_ref_update *iref = NULL;
690 13b2bc37 2022-10-23 stsp size_t datalen;
692 13b2bc37 2022-10-23 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
693 13b2bc37 2022-10-23 stsp if (datalen < sizeof(ireq))
694 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
695 13b2bc37 2022-10-23 stsp memcpy(&ireq, imsg->data, sizeof(ireq));
696 13b2bc37 2022-10-23 stsp if (datalen != sizeof(ireq) + ireq.name_len)
697 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
699 13b2bc37 2022-10-23 stsp iref = malloc(datalen);
700 13b2bc37 2022-10-23 stsp if (iref == NULL)
701 13b2bc37 2022-10-23 stsp return got_error_from_errno("malloc");
702 13b2bc37 2022-10-23 stsp memcpy(iref, imsg->data, datalen);
704 13b2bc37 2022-10-23 stsp iref->client_id = client->id;
705 13b2bc37 2022-10-23 stsp if (gotd_imsg_compose_event(&client->repo_write->iev,
706 13b2bc37 2022-10-23 stsp GOTD_IMSG_REF_UPDATE, PROC_GOTD, -1, iref, datalen) == -1)
707 13b2bc37 2022-10-23 stsp err = got_error_from_errno("imsg compose REF_UPDATE");
708 13b2bc37 2022-10-23 stsp free(iref);
709 13b2bc37 2022-10-23 stsp return err;
712 13b2bc37 2022-10-23 stsp static const struct got_error *
713 13b2bc37 2022-10-23 stsp forward_have(struct gotd_client *client, struct imsg *imsg)
715 13b2bc37 2022-10-23 stsp struct gotd_imsg_have ireq;
716 13b2bc37 2022-10-23 stsp struct gotd_imsg_have ihave;
717 13b2bc37 2022-10-23 stsp size_t datalen;
719 13b2bc37 2022-10-23 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
720 13b2bc37 2022-10-23 stsp if (datalen != sizeof(ireq))
721 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
723 13b2bc37 2022-10-23 stsp memcpy(&ireq, imsg->data, datalen);
725 13b2bc37 2022-10-23 stsp memset(&ihave, 0, sizeof(ihave));
726 13b2bc37 2022-10-23 stsp memcpy(ihave.object_id, ireq.object_id, SHA1_DIGEST_LENGTH);
727 13b2bc37 2022-10-23 stsp ihave.client_id = client->id;
729 13b2bc37 2022-10-23 stsp if (gotd_imsg_compose_event(&client->repo_read->iev, GOTD_IMSG_HAVE,
730 13b2bc37 2022-10-23 stsp PROC_GOTD, -1, &ihave, sizeof(ihave)) == -1)
731 13b2bc37 2022-10-23 stsp return got_error_from_errno("imsg compose HAVE");
733 13b2bc37 2022-10-23 stsp return NULL;
737 13b2bc37 2022-10-23 stsp client_has_capability(struct gotd_client *client, const char *capastr)
739 13b2bc37 2022-10-23 stsp struct gotd_client_capability *capa;
742 13b2bc37 2022-10-23 stsp if (client->ncapabilities == 0)
745 13b2bc37 2022-10-23 stsp for (i = 0; i < client->ncapabilities; i++) {
746 13b2bc37 2022-10-23 stsp capa = &client->capabilities[i];
747 13b2bc37 2022-10-23 stsp if (strcmp(capa->key, capastr) == 0)
754 13b2bc37 2022-10-23 stsp static const struct got_error *
755 13b2bc37 2022-10-23 stsp recv_capabilities(struct gotd_client *client, struct imsg *imsg)
757 13b2bc37 2022-10-23 stsp struct gotd_imsg_capabilities icapas;
758 13b2bc37 2022-10-23 stsp size_t datalen;
760 13b2bc37 2022-10-23 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
761 13b2bc37 2022-10-23 stsp if (datalen != sizeof(icapas))
762 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
763 13b2bc37 2022-10-23 stsp memcpy(&icapas, imsg->data, sizeof(icapas));
765 13b2bc37 2022-10-23 stsp client->ncapa_alloc = icapas.ncapabilities;
766 13b2bc37 2022-10-23 stsp client->capabilities = calloc(client->ncapa_alloc,
767 13b2bc37 2022-10-23 stsp sizeof(*client->capabilities));
768 13b2bc37 2022-10-23 stsp if (client->capabilities == NULL) {
769 13b2bc37 2022-10-23 stsp client->ncapa_alloc = 0;
770 13b2bc37 2022-10-23 stsp return got_error_from_errno("calloc");
773 13b2bc37 2022-10-23 stsp log_debug("expecting %zu capabilities from uid %d",
774 13b2bc37 2022-10-23 stsp client->ncapa_alloc, client->euid);
775 13b2bc37 2022-10-23 stsp return NULL;
778 13b2bc37 2022-10-23 stsp static const struct got_error *
779 13b2bc37 2022-10-23 stsp recv_capability(struct gotd_client *client, struct imsg *imsg)
781 13b2bc37 2022-10-23 stsp struct gotd_imsg_capability icapa;
782 13b2bc37 2022-10-23 stsp struct gotd_client_capability *capa;
783 13b2bc37 2022-10-23 stsp size_t datalen;
784 13b2bc37 2022-10-23 stsp char *key, *value = NULL;
786 13b2bc37 2022-10-23 stsp if (client->capabilities == NULL ||
787 13b2bc37 2022-10-23 stsp client->ncapabilities >= client->ncapa_alloc) {
788 13b2bc37 2022-10-23 stsp return got_error_msg(GOT_ERR_BAD_REQUEST,
789 13b2bc37 2022-10-23 stsp "unexpected capability received");
792 13b2bc37 2022-10-23 stsp memset(&icapa, 0, sizeof(icapa));
794 13b2bc37 2022-10-23 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
795 13b2bc37 2022-10-23 stsp if (datalen < sizeof(icapa))
796 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
797 13b2bc37 2022-10-23 stsp memcpy(&icapa, imsg->data, sizeof(icapa));
799 13b2bc37 2022-10-23 stsp if (datalen != sizeof(icapa) + icapa.key_len + icapa.value_len)
800 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
802 13b2bc37 2022-10-23 stsp key = malloc(icapa.key_len + 1);
803 13b2bc37 2022-10-23 stsp if (key == NULL)
804 13b2bc37 2022-10-23 stsp return got_error_from_errno("malloc");
805 13b2bc37 2022-10-23 stsp if (icapa.value_len > 0) {
806 13b2bc37 2022-10-23 stsp value = malloc(icapa.value_len + 1);
807 13b2bc37 2022-10-23 stsp if (value == NULL) {
809 13b2bc37 2022-10-23 stsp return got_error_from_errno("malloc");
813 13b2bc37 2022-10-23 stsp memcpy(key, imsg->data + sizeof(icapa), icapa.key_len);
814 13b2bc37 2022-10-23 stsp key[icapa.key_len] = '\0';
815 13b2bc37 2022-10-23 stsp if (value) {
816 13b2bc37 2022-10-23 stsp memcpy(value, imsg->data + sizeof(icapa) + icapa.key_len,
817 13b2bc37 2022-10-23 stsp icapa.value_len);
818 13b2bc37 2022-10-23 stsp value[icapa.value_len] = '\0';
821 13b2bc37 2022-10-23 stsp capa = &client->capabilities[client->ncapabilities++];
822 13b2bc37 2022-10-23 stsp capa->key = key;
823 13b2bc37 2022-10-23 stsp capa->value = value;
826 13b2bc37 2022-10-23 stsp log_debug("uid %d: capability %s=%s", client->euid, key, value);
828 13b2bc37 2022-10-23 stsp log_debug("uid %d: capability %s", client->euid, key);
830 13b2bc37 2022-10-23 stsp return NULL;
833 13b2bc37 2022-10-23 stsp static const struct got_error *
834 13b2bc37 2022-10-23 stsp send_packfile(struct gotd_client *client)
836 13b2bc37 2022-10-23 stsp const struct got_error *err = NULL;
837 13b2bc37 2022-10-23 stsp struct gotd_imsg_send_packfile ipack;
838 13b2bc37 2022-10-23 stsp struct gotd_imsg_packfile_pipe ipipe;
839 13b2bc37 2022-10-23 stsp int pipe[2];
841 13b2bc37 2022-10-23 stsp if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe) == -1)
842 13b2bc37 2022-10-23 stsp return got_error_from_errno("socketpair");
844 13b2bc37 2022-10-23 stsp memset(&ipack, 0, sizeof(ipack));
845 13b2bc37 2022-10-23 stsp memset(&ipipe, 0, sizeof(ipipe));
847 13b2bc37 2022-10-23 stsp ipack.client_id = client->id;
848 13b2bc37 2022-10-23 stsp if (client_has_capability(client, GOT_CAPA_SIDE_BAND_64K))
849 13b2bc37 2022-10-23 stsp ipack.report_progress = 1;
851 13b2bc37 2022-10-23 stsp client->delta_cache_fd = got_opentempfd();
852 13b2bc37 2022-10-23 stsp if (client->delta_cache_fd == -1)
853 13b2bc37 2022-10-23 stsp return got_error_from_errno("got_opentempfd");
855 13b2bc37 2022-10-23 stsp if (gotd_imsg_compose_event(&client->repo_read->iev,
856 13b2bc37 2022-10-23 stsp GOTD_IMSG_SEND_PACKFILE, PROC_GOTD, client->delta_cache_fd,
857 13b2bc37 2022-10-23 stsp &ipack, sizeof(ipack)) == -1) {
858 13b2bc37 2022-10-23 stsp err = got_error_from_errno("imsg compose SEND_PACKFILE");
859 13b2bc37 2022-10-23 stsp close(pipe[0]);
860 13b2bc37 2022-10-23 stsp close(pipe[1]);
861 13b2bc37 2022-10-23 stsp return err;
864 13b2bc37 2022-10-23 stsp ipipe.client_id = client->id;
866 86769de8 2022-10-28 stsp /* Send pack pipe end 0 to repo_read. */
867 13b2bc37 2022-10-23 stsp if (gotd_imsg_compose_event(&client->repo_read->iev,
868 13b2bc37 2022-10-23 stsp GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD, pipe[0],
869 13b2bc37 2022-10-23 stsp &ipipe, sizeof(ipipe)) == -1) {
870 13b2bc37 2022-10-23 stsp err = got_error_from_errno("imsg compose PACKFILE_PIPE");
871 13b2bc37 2022-10-23 stsp close(pipe[1]);
872 13b2bc37 2022-10-23 stsp return err;
875 86769de8 2022-10-28 stsp /* Send pack pipe end 1 to gotsh(1) (expects just an fd, no data). */
876 86769de8 2022-10-28 stsp if (gotd_imsg_compose_event(&client->iev,
877 86769de8 2022-10-28 stsp GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD, pipe[1], NULL, 0) == -1)
878 13b2bc37 2022-10-23 stsp err = got_error_from_errno("imsg compose PACKFILE_PIPE");
880 13b2bc37 2022-10-23 stsp return err;
883 13b2bc37 2022-10-23 stsp static const struct got_error *
884 13b2bc37 2022-10-23 stsp recv_packfile(struct gotd_client *client)
886 13b2bc37 2022-10-23 stsp const struct got_error *err = NULL;
887 13b2bc37 2022-10-23 stsp struct gotd_imsg_recv_packfile ipack;
888 13b2bc37 2022-10-23 stsp struct gotd_imsg_packfile_pipe ipipe;
889 13b2bc37 2022-10-23 stsp struct gotd_imsg_packidx_file ifile;
890 13b2bc37 2022-10-23 stsp char *basepath = NULL, *pack_path = NULL, *idx_path = NULL;
891 13b2bc37 2022-10-23 stsp int packfd = -1, idxfd = -1;
892 13b2bc37 2022-10-23 stsp int pipe[2] = { -1, -1 };
894 13b2bc37 2022-10-23 stsp if (client->packfile_path) {
895 13b2bc37 2022-10-23 stsp return got_error_fmt(GOT_ERR_PRIVSEP_MSG,
896 13b2bc37 2022-10-23 stsp "uid %d already has a pack file", client->euid);
899 13b2bc37 2022-10-23 stsp if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe) == -1)
900 13b2bc37 2022-10-23 stsp return got_error_from_errno("socketpair");
902 13b2bc37 2022-10-23 stsp memset(&ipipe, 0, sizeof(ipipe));
903 13b2bc37 2022-10-23 stsp ipipe.client_id = client->id;
905 7fec5f4a 2022-10-28 stsp /* Send pack pipe end 0 to repo_write. */
906 13b2bc37 2022-10-23 stsp if (gotd_imsg_compose_event(&client->repo_write->iev,
907 13b2bc37 2022-10-23 stsp GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD, pipe[0],
908 13b2bc37 2022-10-23 stsp &ipipe, sizeof(ipipe)) == -1) {
909 13b2bc37 2022-10-23 stsp err = got_error_from_errno("imsg compose PACKFILE_PIPE");
910 13b2bc37 2022-10-23 stsp pipe[0] = -1;
913 13b2bc37 2022-10-23 stsp pipe[0] = -1;
915 7fec5f4a 2022-10-28 stsp /* Send pack pipe end 1 to gotsh(1) (expects just an fd, no data). */
916 7fec5f4a 2022-10-28 stsp if (gotd_imsg_compose_event(&client->iev,
917 7fec5f4a 2022-10-28 stsp GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD, pipe[1], NULL, 0) == -1)
918 13b2bc37 2022-10-23 stsp err = got_error_from_errno("imsg compose PACKFILE_PIPE");
919 13b2bc37 2022-10-23 stsp pipe[1] = -1;
921 13b2bc37 2022-10-23 stsp if (asprintf(&basepath, "%s/%s/receiving-from-uid-%d.pack",
922 eec68231 2022-12-14 stsp client->repo_write->repo_path, GOT_OBJECTS_PACK_DIR,
923 13b2bc37 2022-10-23 stsp client->euid) == -1) {
924 13b2bc37 2022-10-23 stsp err = got_error_from_errno("asprintf");
928 b90054ed 2022-11-01 stsp err = got_opentemp_named_fd(&pack_path, &packfd, basepath, "");
932 13b2bc37 2022-10-23 stsp free(basepath);
933 13b2bc37 2022-10-23 stsp if (asprintf(&basepath, "%s/%s/receiving-from-uid-%d.idx",
934 eec68231 2022-12-14 stsp client->repo_write->repo_path, GOT_OBJECTS_PACK_DIR,
935 13b2bc37 2022-10-23 stsp client->euid) == -1) {
936 13b2bc37 2022-10-23 stsp err = got_error_from_errno("asprintf");
937 13b2bc37 2022-10-23 stsp basepath = NULL;
940 b90054ed 2022-11-01 stsp err = got_opentemp_named_fd(&idx_path, &idxfd, basepath, "");
944 13b2bc37 2022-10-23 stsp memset(&ifile, 0, sizeof(ifile));
945 13b2bc37 2022-10-23 stsp ifile.client_id = client->id;
946 13b2bc37 2022-10-23 stsp if (gotd_imsg_compose_event(&client->repo_write->iev,
947 13b2bc37 2022-10-23 stsp GOTD_IMSG_PACKIDX_FILE, PROC_GOTD, idxfd,
948 13b2bc37 2022-10-23 stsp &ifile, sizeof(ifile)) == -1) {
949 13b2bc37 2022-10-23 stsp err = got_error_from_errno("imsg compose PACKIDX_FILE");
950 13b2bc37 2022-10-23 stsp idxfd = -1;
953 13b2bc37 2022-10-23 stsp idxfd = -1;
955 13b2bc37 2022-10-23 stsp memset(&ipack, 0, sizeof(ipack));
956 13b2bc37 2022-10-23 stsp ipack.client_id = client->id;
957 13b2bc37 2022-10-23 stsp if (client_has_capability(client, GOT_CAPA_REPORT_STATUS))
958 13b2bc37 2022-10-23 stsp ipack.report_status = 1;
960 13b2bc37 2022-10-23 stsp if (gotd_imsg_compose_event(&client->repo_write->iev,
961 13b2bc37 2022-10-23 stsp GOTD_IMSG_RECV_PACKFILE, PROC_GOTD, packfd,
962 13b2bc37 2022-10-23 stsp &ipack, sizeof(ipack)) == -1) {
963 13b2bc37 2022-10-23 stsp err = got_error_from_errno("imsg compose RECV_PACKFILE");
964 13b2bc37 2022-10-23 stsp packfd = -1;
967 13b2bc37 2022-10-23 stsp packfd = -1;
970 13b2bc37 2022-10-23 stsp free(basepath);
971 13b2bc37 2022-10-23 stsp if (pipe[0] != -1 && close(pipe[0]) == -1 && err == NULL)
972 13b2bc37 2022-10-23 stsp err = got_error_from_errno("close");
973 13b2bc37 2022-10-23 stsp if (pipe[1] != -1 && close(pipe[1]) == -1 && err == NULL)
974 13b2bc37 2022-10-23 stsp err = got_error_from_errno("close");
975 13b2bc37 2022-10-23 stsp if (packfd != -1 && close(packfd) == -1 && err == NULL)
976 13b2bc37 2022-10-23 stsp err = got_error_from_errno("close");
977 13b2bc37 2022-10-23 stsp if (idxfd != -1 && close(idxfd) == -1 && err == NULL)
978 13b2bc37 2022-10-23 stsp err = got_error_from_errno("close");
980 13b2bc37 2022-10-23 stsp free(pack_path);
981 13b2bc37 2022-10-23 stsp free(idx_path);
983 13b2bc37 2022-10-23 stsp client->packfile_path = pack_path;
984 13b2bc37 2022-10-23 stsp client->packidx_path = idx_path;
986 13b2bc37 2022-10-23 stsp return err;
989 13b2bc37 2022-10-23 stsp static void
990 13b2bc37 2022-10-23 stsp gotd_request(int fd, short events, void *arg)
992 13b2bc37 2022-10-23 stsp struct gotd_imsgev *iev = arg;
993 13b2bc37 2022-10-23 stsp struct imsgbuf *ibuf = &iev->ibuf;
994 13b2bc37 2022-10-23 stsp struct gotd_client *client = iev->handler_arg;
995 13b2bc37 2022-10-23 stsp const struct got_error *err = NULL;
996 13b2bc37 2022-10-23 stsp struct imsg imsg;
999 13b2bc37 2022-10-23 stsp if (events & EV_WRITE) {
1000 13b2bc37 2022-10-23 stsp while (ibuf->w.queued) {
1001 13b2bc37 2022-10-23 stsp n = msgbuf_write(&ibuf->w);
1002 13b2bc37 2022-10-23 stsp if (n == -1 && errno == EPIPE) {
1004 13b2bc37 2022-10-23 stsp * The client has closed its socket.
1005 13b2bc37 2022-10-23 stsp * This can happen when Git clients are
1006 13b2bc37 2022-10-23 stsp * done sending pack file data.
1008 13b2bc37 2022-10-23 stsp msgbuf_clear(&ibuf->w);
1010 13b2bc37 2022-10-23 stsp } else if (n == -1 && errno != EAGAIN) {
1011 13b2bc37 2022-10-23 stsp err = got_error_from_errno("imsg_flush");
1012 13b2bc37 2022-10-23 stsp disconnect_on_error(client, err);
1015 13b2bc37 2022-10-23 stsp if (n == 0) {
1016 13b2bc37 2022-10-23 stsp /* Connection closed. */
1017 13b2bc37 2022-10-23 stsp err = got_error(GOT_ERR_EOF);
1018 13b2bc37 2022-10-23 stsp disconnect_on_error(client, err);
1023 f1752522 2022-10-29 stsp /* Disconnect gotctl(8) now that messages have been sent. */
1024 f1752522 2022-10-29 stsp if (!client_is_reading(client) && !client_is_writing(client)) {
1025 f1752522 2022-10-29 stsp disconnect(client);
1030 13b2bc37 2022-10-23 stsp if ((events & EV_READ) == 0)
1033 13b2bc37 2022-10-23 stsp memset(&imsg, 0, sizeof(imsg));
1035 13b2bc37 2022-10-23 stsp while (err == NULL) {
1036 13b2bc37 2022-10-23 stsp err = gotd_imsg_recv(&imsg, ibuf, 0);
1037 13b2bc37 2022-10-23 stsp if (err) {
1038 13b2bc37 2022-10-23 stsp if (err->code == GOT_ERR_PRIVSEP_READ)
1039 13b2bc37 2022-10-23 stsp err = NULL;
1043 13b2bc37 2022-10-23 stsp evtimer_del(&client->tmo);
1045 13b2bc37 2022-10-23 stsp switch (imsg.hdr.type) {
1046 f1752522 2022-10-29 stsp case GOTD_IMSG_INFO:
1047 f1752522 2022-10-29 stsp err = send_info(client);
1049 f1752522 2022-10-29 stsp case GOTD_IMSG_STOP:
1050 f1752522 2022-10-29 stsp err = stop_gotd(client);
1052 13b2bc37 2022-10-23 stsp case GOTD_IMSG_LIST_REFS:
1053 13b2bc37 2022-10-23 stsp if (client->state != GOTD_STATE_EXPECT_LIST_REFS) {
1054 13b2bc37 2022-10-23 stsp err = got_error_msg(GOT_ERR_BAD_REQUEST,
1055 13b2bc37 2022-10-23 stsp "unexpected list-refs request received");
1058 b50a2b46 2022-12-29 stsp err = start_client_session(client, &imsg);
1062 13b2bc37 2022-10-23 stsp case GOTD_IMSG_CAPABILITIES:
1063 13b2bc37 2022-10-23 stsp if (client->state != GOTD_STATE_EXPECT_CAPABILITIES) {
1064 13b2bc37 2022-10-23 stsp err = got_error_msg(GOT_ERR_BAD_REQUEST,
1065 13b2bc37 2022-10-23 stsp "unexpected capabilities received");
1068 13b2bc37 2022-10-23 stsp log_debug("receiving capabilities from uid %d",
1069 13b2bc37 2022-10-23 stsp client->euid);
1070 13b2bc37 2022-10-23 stsp err = recv_capabilities(client, &imsg);
1072 13b2bc37 2022-10-23 stsp case GOTD_IMSG_CAPABILITY:
1073 13b2bc37 2022-10-23 stsp if (client->state != GOTD_STATE_EXPECT_CAPABILITIES) {
1074 13b2bc37 2022-10-23 stsp err = got_error_msg(GOT_ERR_BAD_REQUEST,
1075 13b2bc37 2022-10-23 stsp "unexpected capability received");
1078 13b2bc37 2022-10-23 stsp err = recv_capability(client, &imsg);
1079 13b2bc37 2022-10-23 stsp if (err || client->ncapabilities < client->ncapa_alloc)
1081 13b2bc37 2022-10-23 stsp if (client_is_reading(client)) {
1082 13b2bc37 2022-10-23 stsp client->state = GOTD_STATE_EXPECT_WANT;
1083 13b2bc37 2022-10-23 stsp log_debug("uid %d: expecting want-lines",
1084 13b2bc37 2022-10-23 stsp client->euid);
1085 13b2bc37 2022-10-23 stsp } else if (client_is_writing(client)) {
1086 13b2bc37 2022-10-23 stsp client->state = GOTD_STATE_EXPECT_REF_UPDATE;
1087 13b2bc37 2022-10-23 stsp log_debug("uid %d: expecting ref-update-lines",
1088 13b2bc37 2022-10-23 stsp client->euid);
1090 13b2bc37 2022-10-23 stsp fatalx("client %d is both reading and writing",
1091 13b2bc37 2022-10-23 stsp client->euid);
1093 13b2bc37 2022-10-23 stsp case GOTD_IMSG_WANT:
1094 13b2bc37 2022-10-23 stsp if (client->state != GOTD_STATE_EXPECT_WANT) {
1095 13b2bc37 2022-10-23 stsp err = got_error_msg(GOT_ERR_BAD_REQUEST,
1096 13b2bc37 2022-10-23 stsp "unexpected want-line received");
1099 13b2bc37 2022-10-23 stsp log_debug("received want-line from uid %d",
1100 13b2bc37 2022-10-23 stsp client->euid);
1101 13b2bc37 2022-10-23 stsp err = ensure_client_is_reading(client);
1104 13b2bc37 2022-10-23 stsp err = forward_want(client, &imsg);
1106 13b2bc37 2022-10-23 stsp case GOTD_IMSG_REF_UPDATE:
1107 13b2bc37 2022-10-23 stsp if (client->state != GOTD_STATE_EXPECT_REF_UPDATE) {
1108 13b2bc37 2022-10-23 stsp err = got_error_msg(GOT_ERR_BAD_REQUEST,
1109 13b2bc37 2022-10-23 stsp "unexpected ref-update-line received");
1112 13b2bc37 2022-10-23 stsp log_debug("received ref-update-line from uid %d",
1113 13b2bc37 2022-10-23 stsp client->euid);
1114 13b2bc37 2022-10-23 stsp err = ensure_client_is_writing(client);
1117 13b2bc37 2022-10-23 stsp err = forward_ref_update(client, &imsg);
1120 13b2bc37 2022-10-23 stsp client->state = GOTD_STATE_EXPECT_MORE_REF_UPDATES;
1122 13b2bc37 2022-10-23 stsp case GOTD_IMSG_HAVE:
1123 13b2bc37 2022-10-23 stsp if (client->state != GOTD_STATE_EXPECT_HAVE) {
1124 13b2bc37 2022-10-23 stsp err = got_error_msg(GOT_ERR_BAD_REQUEST,
1125 13b2bc37 2022-10-23 stsp "unexpected have-line received");
1128 13b2bc37 2022-10-23 stsp log_debug("received have-line from uid %d",
1129 13b2bc37 2022-10-23 stsp client->euid);
1130 13b2bc37 2022-10-23 stsp err = ensure_client_is_reading(client);
1133 13b2bc37 2022-10-23 stsp err = forward_have(client, &imsg);
1137 13b2bc37 2022-10-23 stsp case GOTD_IMSG_FLUSH:
1138 13b2bc37 2022-10-23 stsp if (client->state == GOTD_STATE_EXPECT_WANT ||
1139 13b2bc37 2022-10-23 stsp client->state == GOTD_STATE_EXPECT_HAVE) {
1140 13b2bc37 2022-10-23 stsp err = ensure_client_is_reading(client);
1143 13b2bc37 2022-10-23 stsp } else if (client->state ==
1144 13b2bc37 2022-10-23 stsp GOTD_STATE_EXPECT_MORE_REF_UPDATES) {
1145 13b2bc37 2022-10-23 stsp err = ensure_client_is_writing(client);
1149 13b2bc37 2022-10-23 stsp err = got_error_msg(GOT_ERR_BAD_REQUEST,
1150 13b2bc37 2022-10-23 stsp "unexpected flush-pkt received");
1153 13b2bc37 2022-10-23 stsp log_debug("received flush-pkt from uid %d",
1154 13b2bc37 2022-10-23 stsp client->euid);
1155 13b2bc37 2022-10-23 stsp if (client->state == GOTD_STATE_EXPECT_WANT) {
1156 13b2bc37 2022-10-23 stsp client->state = GOTD_STATE_EXPECT_HAVE;
1157 13b2bc37 2022-10-23 stsp log_debug("uid %d: expecting have-lines",
1158 13b2bc37 2022-10-23 stsp client->euid);
1159 13b2bc37 2022-10-23 stsp } else if (client->state == GOTD_STATE_EXPECT_HAVE) {
1160 13b2bc37 2022-10-23 stsp client->state = GOTD_STATE_EXPECT_DONE;
1161 13b2bc37 2022-10-23 stsp log_debug("uid %d: expecting 'done'",
1162 13b2bc37 2022-10-23 stsp client->euid);
1163 13b2bc37 2022-10-23 stsp } else if (client->state ==
1164 13b2bc37 2022-10-23 stsp GOTD_STATE_EXPECT_MORE_REF_UPDATES) {
1165 13b2bc37 2022-10-23 stsp client->state = GOTD_STATE_EXPECT_PACKFILE;
1166 13b2bc37 2022-10-23 stsp log_debug("uid %d: expecting packfile",
1167 13b2bc37 2022-10-23 stsp client->euid);
1168 13b2bc37 2022-10-23 stsp err = recv_packfile(client);
1170 13b2bc37 2022-10-23 stsp /* should not happen, see above */
1171 13b2bc37 2022-10-23 stsp err = got_error_msg(GOT_ERR_BAD_REQUEST,
1172 13b2bc37 2022-10-23 stsp "unexpected client state");
1176 13b2bc37 2022-10-23 stsp case GOTD_IMSG_DONE:
1177 13b2bc37 2022-10-23 stsp if (client->state != GOTD_STATE_EXPECT_HAVE &&
1178 13b2bc37 2022-10-23 stsp client->state != GOTD_STATE_EXPECT_DONE) {
1179 13b2bc37 2022-10-23 stsp err = got_error_msg(GOT_ERR_BAD_REQUEST,
1180 13b2bc37 2022-10-23 stsp "unexpected flush-pkt received");
1183 13b2bc37 2022-10-23 stsp log_debug("received 'done' from uid %d", client->euid);
1184 13b2bc37 2022-10-23 stsp err = ensure_client_is_reading(client);
1187 13b2bc37 2022-10-23 stsp client->state = GOTD_STATE_DONE;
1188 13b2bc37 2022-10-23 stsp err = send_packfile(client);
1191 13b2bc37 2022-10-23 stsp err = got_error(GOT_ERR_PRIVSEP_MSG);
1195 13b2bc37 2022-10-23 stsp imsg_free(&imsg);
1198 13b2bc37 2022-10-23 stsp if (err) {
1199 13b2bc37 2022-10-23 stsp if (err->code != GOT_ERR_EOF ||
1200 13b2bc37 2022-10-23 stsp client->state != GOTD_STATE_EXPECT_PACKFILE)
1201 13b2bc37 2022-10-23 stsp disconnect_on_error(client, err);
1203 13b2bc37 2022-10-23 stsp gotd_imsg_event_add(&client->iev);
1204 ef4e2f01 2022-12-29 stsp if (client->state == GOTD_STATE_EXPECT_LIST_REFS)
1205 ef4e2f01 2022-12-29 stsp evtimer_add(&client->tmo, &auth_timeout);
1207 ef4e2f01 2022-12-29 stsp evtimer_add(&client->tmo, &timeout);
1211 13b2bc37 2022-10-23 stsp static void
1212 13b2bc37 2022-10-23 stsp gotd_request_timeout(int fd, short events, void *arg)
1214 13b2bc37 2022-10-23 stsp struct gotd_client *client = arg;
1216 13b2bc37 2022-10-23 stsp log_debug("disconnecting uid %d due to timeout", client->euid);
1217 13b2bc37 2022-10-23 stsp disconnect(client);
1220 d93ecf7d 2022-12-14 stsp static const struct got_error *
1221 d93ecf7d 2022-12-14 stsp recv_connect(uint32_t *client_id, struct imsg *imsg)
1223 d93ecf7d 2022-12-14 stsp const struct got_error *err = NULL;
1224 d93ecf7d 2022-12-14 stsp struct gotd_imsg_connect iconnect;
1225 d93ecf7d 2022-12-14 stsp size_t datalen;
1226 13b2bc37 2022-10-23 stsp int s = -1;
1227 13b2bc37 2022-10-23 stsp struct gotd_client *client = NULL;
1229 d93ecf7d 2022-12-14 stsp *client_id = 0;
1231 d93ecf7d 2022-12-14 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1232 d93ecf7d 2022-12-14 stsp if (datalen != sizeof(iconnect))
1233 d93ecf7d 2022-12-14 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
1234 d93ecf7d 2022-12-14 stsp memcpy(&iconnect, imsg->data, sizeof(iconnect));
1236 d93ecf7d 2022-12-14 stsp s = imsg->fd;
1237 13b2bc37 2022-10-23 stsp if (s == -1) {
1238 d93ecf7d 2022-12-14 stsp err = got_error(GOT_ERR_PRIVSEP_NO_FD);
1239 d93ecf7d 2022-12-14 stsp goto done;
1242 d93ecf7d 2022-12-14 stsp if (find_client(iconnect.client_id)) {
1243 d93ecf7d 2022-12-14 stsp err = got_error_msg(GOT_ERR_CLIENT_ID, "duplicate client ID");
1244 d93ecf7d 2022-12-14 stsp goto done;
1247 13b2bc37 2022-10-23 stsp client = calloc(1, sizeof(*client));
1248 13b2bc37 2022-10-23 stsp if (client == NULL) {
1249 d93ecf7d 2022-12-14 stsp err = got_error_from_errno("calloc");
1250 d93ecf7d 2022-12-14 stsp goto done;
1253 d93ecf7d 2022-12-14 stsp *client_id = iconnect.client_id;
1255 13b2bc37 2022-10-23 stsp client->state = GOTD_STATE_EXPECT_LIST_REFS;
1256 d93ecf7d 2022-12-14 stsp client->id = iconnect.client_id;
1257 13b2bc37 2022-10-23 stsp client->fd = s;
1259 13b2bc37 2022-10-23 stsp client->delta_cache_fd = -1;
1260 365cf0f3 2022-12-29 stsp /* The auth process will verify UID/GID for us. */
1261 365cf0f3 2022-12-29 stsp client->euid = iconnect.euid;
1262 365cf0f3 2022-12-29 stsp client->egid = iconnect.egid;
1263 13b2bc37 2022-10-23 stsp client->nref_updates = -1;
1265 13b2bc37 2022-10-23 stsp imsg_init(&client->iev.ibuf, client->fd);
1266 13b2bc37 2022-10-23 stsp client->iev.handler = gotd_request;
1267 13b2bc37 2022-10-23 stsp client->iev.events = EV_READ;
1268 13b2bc37 2022-10-23 stsp client->iev.handler_arg = client;
1270 13b2bc37 2022-10-23 stsp event_set(&client->iev.ev, client->fd, EV_READ, gotd_request,
1271 13b2bc37 2022-10-23 stsp &client->iev);
1272 13b2bc37 2022-10-23 stsp gotd_imsg_event_add(&client->iev);
1274 13b2bc37 2022-10-23 stsp evtimer_set(&client->tmo, gotd_request_timeout, client);
1276 13b2bc37 2022-10-23 stsp add_client(client);
1277 13b2bc37 2022-10-23 stsp log_debug("%s: new client uid %d connected on fd %d", __func__,
1278 13b2bc37 2022-10-23 stsp client->euid, client->fd);
1280 d93ecf7d 2022-12-14 stsp if (err) {
1281 b50a2b46 2022-12-29 stsp struct gotd_child_proc *listen_proc = &gotd.listen_proc;
1282 d93ecf7d 2022-12-14 stsp struct gotd_imsg_disconnect idisconnect;
1284 d93ecf7d 2022-12-14 stsp idisconnect.client_id = client->id;
1285 d93ecf7d 2022-12-14 stsp if (gotd_imsg_compose_event(&listen_proc->iev,
1286 d93ecf7d 2022-12-14 stsp GOTD_IMSG_DISCONNECT, PROC_GOTD, -1,
1287 d93ecf7d 2022-12-14 stsp &idisconnect, sizeof(idisconnect)) == -1)
1288 d93ecf7d 2022-12-14 stsp log_warn("imsg compose DISCONNECT");
1290 d93ecf7d 2022-12-14 stsp if (s != -1)
1294 d93ecf7d 2022-12-14 stsp return err;
1297 13b2bc37 2022-10-23 stsp static const char *gotd_proc_names[PROC_MAX] = {
1301 13b2bc37 2022-10-23 stsp "repo_read",
1302 13b2bc37 2022-10-23 stsp "repo_write"
1305 13b2bc37 2022-10-23 stsp static void
1306 13b2bc37 2022-10-23 stsp kill_proc(struct gotd_child_proc *proc, int fatal)
1308 13b2bc37 2022-10-23 stsp if (fatal) {
1309 13b2bc37 2022-10-23 stsp log_warnx("sending SIGKILL to PID %d", proc->pid);
1310 13b2bc37 2022-10-23 stsp kill(proc->pid, SIGKILL);
1312 13b2bc37 2022-10-23 stsp kill(proc->pid, SIGTERM);
1315 13b2bc37 2022-10-23 stsp static void
1316 13b2bc37 2022-10-23 stsp gotd_shutdown(void)
1318 13b2bc37 2022-10-23 stsp struct gotd_child_proc *proc;
1319 b50a2b46 2022-12-29 stsp uint64_t slot;
1321 b50a2b46 2022-12-29 stsp for (slot = 0; slot < nitems(gotd_clients); slot++) {
1322 b50a2b46 2022-12-29 stsp struct gotd_client *c, *tmp;
1324 b50a2b46 2022-12-29 stsp STAILQ_FOREACH_SAFE(c, &gotd_clients[slot], entry, tmp)
1325 b50a2b46 2022-12-29 stsp disconnect(c);
1328 b50a2b46 2022-12-29 stsp proc = &gotd.listen_proc;
1329 b50a2b46 2022-12-29 stsp msgbuf_clear(&proc->iev.ibuf.w);
1330 b50a2b46 2022-12-29 stsp close(proc->iev.ibuf.fd);
1331 b50a2b46 2022-12-29 stsp kill_proc(proc, 0);
1332 5e25db14 2022-12-29 stsp wait_for_child(proc->pid);
1334 13b2bc37 2022-10-23 stsp log_info("terminating");
1339 13b2bc37 2022-10-23 stsp gotd_sighdlr(int sig, short event, void *arg)
1342 13b2bc37 2022-10-23 stsp * Normal signal handler rules don't apply because libevent
1343 13b2bc37 2022-10-23 stsp * decouples for us.
1346 13b2bc37 2022-10-23 stsp switch (sig) {
1347 13b2bc37 2022-10-23 stsp case SIGHUP:
1348 13b2bc37 2022-10-23 stsp log_info("%s: ignoring SIGHUP", __func__);
1350 13b2bc37 2022-10-23 stsp case SIGUSR1:
1351 13b2bc37 2022-10-23 stsp log_info("%s: ignoring SIGUSR1", __func__);
1353 13b2bc37 2022-10-23 stsp case SIGTERM:
1354 13b2bc37 2022-10-23 stsp case SIGINT:
1355 13b2bc37 2022-10-23 stsp gotd_shutdown();
1356 13b2bc37 2022-10-23 stsp log_warnx("gotd terminating");
1360 13b2bc37 2022-10-23 stsp fatalx("unexpected signal");
1364 13b2bc37 2022-10-23 stsp static const struct got_error *
1365 13b2bc37 2022-10-23 stsp ensure_proc_is_reading(struct gotd_client *client,
1366 13b2bc37 2022-10-23 stsp struct gotd_child_proc *proc)
1368 13b2bc37 2022-10-23 stsp if (!client_is_reading(client)) {
1369 13b2bc37 2022-10-23 stsp kill_proc(proc, 1);
1370 13b2bc37 2022-10-23 stsp return got_error_fmt(GOT_ERR_BAD_PACKET,
1371 13b2bc37 2022-10-23 stsp "PID %d handled a read-request for uid %d but this "
1372 13b2bc37 2022-10-23 stsp "user is not reading from a repository", proc->pid,
1373 13b2bc37 2022-10-23 stsp client->euid);
1376 13b2bc37 2022-10-23 stsp return NULL;
1379 13b2bc37 2022-10-23 stsp static const struct got_error *
1380 13b2bc37 2022-10-23 stsp ensure_proc_is_writing(struct gotd_client *client,
1381 13b2bc37 2022-10-23 stsp struct gotd_child_proc *proc)
1383 13b2bc37 2022-10-23 stsp if (!client_is_writing(client)) {
1384 13b2bc37 2022-10-23 stsp kill_proc(proc, 1);
1385 13b2bc37 2022-10-23 stsp return got_error_fmt(GOT_ERR_BAD_PACKET,
1386 13b2bc37 2022-10-23 stsp "PID %d handled a write-request for uid %d but this "
1387 13b2bc37 2022-10-23 stsp "user is not writing to a repository", proc->pid,
1388 13b2bc37 2022-10-23 stsp client->euid);
1391 13b2bc37 2022-10-23 stsp return NULL;
1394 13b2bc37 2022-10-23 stsp static int
1395 13b2bc37 2022-10-23 stsp verify_imsg_src(struct gotd_client *client, struct gotd_child_proc *proc,
1396 13b2bc37 2022-10-23 stsp struct imsg *imsg)
1398 13b2bc37 2022-10-23 stsp const struct got_error *err;
1399 13b2bc37 2022-10-23 stsp struct gotd_child_proc *client_proc;
1400 13b2bc37 2022-10-23 stsp int ret = 0;
1402 d93ecf7d 2022-12-14 stsp if (proc->type == PROC_REPO_READ || proc->type == PROC_REPO_WRITE) {
1403 d93ecf7d 2022-12-14 stsp client_proc = get_client_proc(client);
1404 d93ecf7d 2022-12-14 stsp if (client_proc == NULL)
1405 d93ecf7d 2022-12-14 stsp fatalx("no process found for uid %d", client->euid);
1406 d93ecf7d 2022-12-14 stsp if (proc->pid != client_proc->pid) {
1407 d93ecf7d 2022-12-14 stsp kill_proc(proc, 1);
1408 d93ecf7d 2022-12-14 stsp log_warnx("received message from PID %d for uid %d, "
1409 d93ecf7d 2022-12-14 stsp "while PID %d is the process serving this user",
1410 d93ecf7d 2022-12-14 stsp proc->pid, client->euid, client_proc->pid);
1415 13b2bc37 2022-10-23 stsp switch (imsg->hdr.type) {
1416 13b2bc37 2022-10-23 stsp case GOTD_IMSG_ERROR:
1419 d93ecf7d 2022-12-14 stsp case GOTD_IMSG_CONNECT:
1420 d93ecf7d 2022-12-14 stsp if (proc->type != PROC_LISTEN) {
1421 d93ecf7d 2022-12-14 stsp err = got_error_fmt(GOT_ERR_BAD_PACKET,
1422 d93ecf7d 2022-12-14 stsp "new connection for uid %d from PID %d "
1423 d93ecf7d 2022-12-14 stsp "which is not the listen process",
1424 5e25db14 2022-12-29 stsp proc->pid, client->euid);
1428 5e25db14 2022-12-29 stsp case GOTD_IMSG_ACCESS_GRANTED:
1429 5e25db14 2022-12-29 stsp if (proc->type != PROC_AUTH) {
1430 5e25db14 2022-12-29 stsp err = got_error_fmt(GOT_ERR_BAD_PACKET,
1431 5e25db14 2022-12-29 stsp "authentication of uid %d from PID %d "
1432 5e25db14 2022-12-29 stsp "which is not the auth process",
1433 d93ecf7d 2022-12-14 stsp proc->pid, client->euid);
1437 b50a2b46 2022-12-29 stsp case GOTD_IMSG_REPO_CHILD_READY:
1438 b50a2b46 2022-12-29 stsp if (proc->type != PROC_REPO_READ &&
1439 b50a2b46 2022-12-29 stsp proc->type != PROC_REPO_WRITE) {
1440 b50a2b46 2022-12-29 stsp err = got_error_fmt(GOT_ERR_BAD_PACKET,
1441 b50a2b46 2022-12-29 stsp "unexpected \"ready\" signal from PID %d",
1442 b50a2b46 2022-12-29 stsp proc->pid);
1446 13b2bc37 2022-10-23 stsp case GOTD_IMSG_PACKFILE_DONE:
1447 13b2bc37 2022-10-23 stsp err = ensure_proc_is_reading(client, proc);
1449 13b2bc37 2022-10-23 stsp log_warnx("uid %d: %s", client->euid, err->msg);
1453 13b2bc37 2022-10-23 stsp case GOTD_IMSG_PACKFILE_INSTALL:
1454 13b2bc37 2022-10-23 stsp case GOTD_IMSG_REF_UPDATES_START:
1455 13b2bc37 2022-10-23 stsp case GOTD_IMSG_REF_UPDATE:
1456 13b2bc37 2022-10-23 stsp err = ensure_proc_is_writing(client, proc);
1458 13b2bc37 2022-10-23 stsp log_warnx("uid %d: %s", client->euid, err->msg);
1463 13b2bc37 2022-10-23 stsp log_debug("%s: unexpected imsg %d", __func__, imsg->hdr.type);
1467 13b2bc37 2022-10-23 stsp return ret;
1470 13b2bc37 2022-10-23 stsp static const struct got_error *
1471 b50a2b46 2022-12-29 stsp list_refs_request(struct gotd_client *client, struct gotd_imsgev *iev)
1473 b50a2b46 2022-12-29 stsp static const struct got_error *err;
1474 b50a2b46 2022-12-29 stsp struct gotd_imsg_list_refs_internal ilref;
1477 b50a2b46 2022-12-29 stsp memset(&ilref, 0, sizeof(ilref));
1478 b50a2b46 2022-12-29 stsp ilref.client_id = client->id;
1480 b50a2b46 2022-12-29 stsp fd = dup(client->fd);
1481 b50a2b46 2022-12-29 stsp if (fd == -1)
1482 b50a2b46 2022-12-29 stsp return got_error_from_errno("dup");
1484 b50a2b46 2022-12-29 stsp if (gotd_imsg_compose_event(iev, GOTD_IMSG_LIST_REFS_INTERNAL,
1485 b50a2b46 2022-12-29 stsp PROC_GOTD, fd, &ilref, sizeof(ilref)) == -1) {
1486 b50a2b46 2022-12-29 stsp err = got_error_from_errno("imsg compose WANT");
1487 b50a2b46 2022-12-29 stsp close(fd);
1488 b50a2b46 2022-12-29 stsp return err;
1491 b50a2b46 2022-12-29 stsp client->state = GOTD_STATE_EXPECT_CAPABILITIES;
1492 b50a2b46 2022-12-29 stsp log_debug("uid %d: expecting capabilities", client->euid);
1493 b50a2b46 2022-12-29 stsp return NULL;
1496 b50a2b46 2022-12-29 stsp static const struct got_error *
1497 13b2bc37 2022-10-23 stsp recv_packfile_done(uint32_t *client_id, struct imsg *imsg)
1499 13b2bc37 2022-10-23 stsp struct gotd_imsg_packfile_done idone;
1500 13b2bc37 2022-10-23 stsp size_t datalen;
1502 13b2bc37 2022-10-23 stsp log_debug("packfile-done received");
1504 13b2bc37 2022-10-23 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1505 13b2bc37 2022-10-23 stsp if (datalen != sizeof(idone))
1506 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
1507 13b2bc37 2022-10-23 stsp memcpy(&idone, imsg->data, sizeof(idone));
1509 13b2bc37 2022-10-23 stsp *client_id = idone.client_id;
1510 13b2bc37 2022-10-23 stsp return NULL;
1513 13b2bc37 2022-10-23 stsp static const struct got_error *
1514 13b2bc37 2022-10-23 stsp recv_packfile_install(uint32_t *client_id, struct imsg *imsg)
1516 13b2bc37 2022-10-23 stsp struct gotd_imsg_packfile_install inst;
1517 13b2bc37 2022-10-23 stsp size_t datalen;
1519 13b2bc37 2022-10-23 stsp log_debug("packfile-install received");
1521 13b2bc37 2022-10-23 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1522 13b2bc37 2022-10-23 stsp if (datalen != sizeof(inst))
1523 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
1524 13b2bc37 2022-10-23 stsp memcpy(&inst, imsg->data, sizeof(inst));
1526 13b2bc37 2022-10-23 stsp *client_id = inst.client_id;
1527 13b2bc37 2022-10-23 stsp return NULL;
1530 13b2bc37 2022-10-23 stsp static const struct got_error *
1531 13b2bc37 2022-10-23 stsp recv_ref_updates_start(uint32_t *client_id, struct imsg *imsg)
1533 13b2bc37 2022-10-23 stsp struct gotd_imsg_ref_updates_start istart;
1534 13b2bc37 2022-10-23 stsp size_t datalen;
1536 13b2bc37 2022-10-23 stsp log_debug("ref-updates-start received");
1538 13b2bc37 2022-10-23 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1539 13b2bc37 2022-10-23 stsp if (datalen != sizeof(istart))
1540 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
1541 13b2bc37 2022-10-23 stsp memcpy(&istart, imsg->data, sizeof(istart));
1543 13b2bc37 2022-10-23 stsp *client_id = istart.client_id;
1544 13b2bc37 2022-10-23 stsp return NULL;
1547 13b2bc37 2022-10-23 stsp static const struct got_error *
1548 13b2bc37 2022-10-23 stsp recv_ref_update(uint32_t *client_id, struct imsg *imsg)
1550 13b2bc37 2022-10-23 stsp struct gotd_imsg_ref_update iref;
1551 13b2bc37 2022-10-23 stsp size_t datalen;
1553 13b2bc37 2022-10-23 stsp log_debug("ref-update received");
1555 13b2bc37 2022-10-23 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1556 13b2bc37 2022-10-23 stsp if (datalen < sizeof(iref))
1557 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
1558 13b2bc37 2022-10-23 stsp memcpy(&iref, imsg->data, sizeof(iref));
1560 13b2bc37 2022-10-23 stsp *client_id = iref.client_id;
1561 13b2bc37 2022-10-23 stsp return NULL;
1564 13b2bc37 2022-10-23 stsp static const struct got_error *
1565 13b2bc37 2022-10-23 stsp send_ref_update_ok(struct gotd_client *client,
1566 13b2bc37 2022-10-23 stsp struct gotd_imsg_ref_update *iref, const char *refname)
1568 13b2bc37 2022-10-23 stsp struct gotd_imsg_ref_update_ok iok;
1569 13b2bc37 2022-10-23 stsp struct ibuf *wbuf;
1570 13b2bc37 2022-10-23 stsp size_t len;
1572 13b2bc37 2022-10-23 stsp memset(&iok, 0, sizeof(iok));
1573 13b2bc37 2022-10-23 stsp iok.client_id = client->id;
1574 13b2bc37 2022-10-23 stsp memcpy(iok.old_id, iref->old_id, SHA1_DIGEST_LENGTH);
1575 13b2bc37 2022-10-23 stsp memcpy(iok.new_id, iref->new_id, SHA1_DIGEST_LENGTH);
1576 13b2bc37 2022-10-23 stsp iok.name_len = strlen(refname);
1578 13b2bc37 2022-10-23 stsp len = sizeof(iok) + iok.name_len;
1579 13b2bc37 2022-10-23 stsp wbuf = imsg_create(&client->iev.ibuf, GOTD_IMSG_REF_UPDATE_OK,
1580 13b2bc37 2022-10-23 stsp PROC_GOTD, gotd.pid, len);
1581 13b2bc37 2022-10-23 stsp if (wbuf == NULL)
1582 13b2bc37 2022-10-23 stsp return got_error_from_errno("imsg_create REF_UPDATE_OK");
1584 13b2bc37 2022-10-23 stsp if (imsg_add(wbuf, &iok, sizeof(iok)) == -1)
1585 13b2bc37 2022-10-23 stsp return got_error_from_errno("imsg_add REF_UPDATE_OK");
1586 13b2bc37 2022-10-23 stsp if (imsg_add(wbuf, refname, iok.name_len) == -1)
1587 13b2bc37 2022-10-23 stsp return got_error_from_errno("imsg_add REF_UPDATE_OK");
1589 13b2bc37 2022-10-23 stsp wbuf->fd = -1;
1590 13b2bc37 2022-10-23 stsp imsg_close(&client->iev.ibuf, wbuf);
1591 13b2bc37 2022-10-23 stsp gotd_imsg_event_add(&client->iev);
1592 13b2bc37 2022-10-23 stsp return NULL;
1595 13b2bc37 2022-10-23 stsp static void
1596 13b2bc37 2022-10-23 stsp send_refs_updated(struct gotd_client *client)
1598 13b2bc37 2022-10-23 stsp if (gotd_imsg_compose_event(&client->iev,
1599 13b2bc37 2022-10-23 stsp GOTD_IMSG_REFS_UPDATED, PROC_GOTD, -1, NULL, 0) == -1)
1600 13b2bc37 2022-10-23 stsp log_warn("imsg compose REFS_UPDATED");
1603 13b2bc37 2022-10-23 stsp static const struct got_error *
1604 13b2bc37 2022-10-23 stsp send_ref_update_ng(struct gotd_client *client,
1605 13b2bc37 2022-10-23 stsp struct gotd_imsg_ref_update *iref, const char *refname,
1606 13b2bc37 2022-10-23 stsp const char *reason)
1608 13b2bc37 2022-10-23 stsp const struct got_error *ng_err;
1609 13b2bc37 2022-10-23 stsp struct gotd_imsg_ref_update_ng ing;
1610 13b2bc37 2022-10-23 stsp struct ibuf *wbuf;
1611 13b2bc37 2022-10-23 stsp size_t len;
1613 13b2bc37 2022-10-23 stsp memset(&ing, 0, sizeof(ing));
1614 13b2bc37 2022-10-23 stsp ing.client_id = client->id;
1615 13b2bc37 2022-10-23 stsp memcpy(ing.old_id, iref->old_id, SHA1_DIGEST_LENGTH);
1616 13b2bc37 2022-10-23 stsp memcpy(ing.new_id, iref->new_id, SHA1_DIGEST_LENGTH);
1617 13b2bc37 2022-10-23 stsp ing.name_len = strlen(refname);
1619 13b2bc37 2022-10-23 stsp ng_err = got_error_fmt(GOT_ERR_REF_BUSY, "%s", reason);
1620 13b2bc37 2022-10-23 stsp ing.reason_len = strlen(ng_err->msg);
1622 13b2bc37 2022-10-23 stsp len = sizeof(ing) + ing.name_len + ing.reason_len;
1623 13b2bc37 2022-10-23 stsp wbuf = imsg_create(&client->iev.ibuf, GOTD_IMSG_REF_UPDATE_NG,
1624 13b2bc37 2022-10-23 stsp PROC_GOTD, gotd.pid, len);
1625 13b2bc37 2022-10-23 stsp if (wbuf == NULL)
1626 13b2bc37 2022-10-23 stsp return got_error_from_errno("imsg_create REF_UPDATE_NG");
1628 13b2bc37 2022-10-23 stsp if (imsg_add(wbuf, &ing, sizeof(ing)) == -1)
1629 13b2bc37 2022-10-23 stsp return got_error_from_errno("imsg_add REF_UPDATE_NG");
1630 13b2bc37 2022-10-23 stsp if (imsg_add(wbuf, refname, ing.name_len) == -1)
1631 13b2bc37 2022-10-23 stsp return got_error_from_errno("imsg_add REF_UPDATE_NG");
1632 13b2bc37 2022-10-23 stsp if (imsg_add(wbuf, ng_err->msg, ing.reason_len) == -1)
1633 13b2bc37 2022-10-23 stsp return got_error_from_errno("imsg_add REF_UPDATE_NG");
1635 13b2bc37 2022-10-23 stsp wbuf->fd = -1;
1636 13b2bc37 2022-10-23 stsp imsg_close(&client->iev.ibuf, wbuf);
1637 13b2bc37 2022-10-23 stsp gotd_imsg_event_add(&client->iev);
1638 13b2bc37 2022-10-23 stsp return NULL;
1641 13b2bc37 2022-10-23 stsp static const struct got_error *
1642 13b2bc37 2022-10-23 stsp install_pack(struct gotd_client *client, const char *repo_path,
1643 13b2bc37 2022-10-23 stsp struct imsg *imsg)
1645 13b2bc37 2022-10-23 stsp const struct got_error *err = NULL;
1646 13b2bc37 2022-10-23 stsp struct gotd_imsg_packfile_install inst;
1647 13b2bc37 2022-10-23 stsp char hex[SHA1_DIGEST_STRING_LENGTH];
1648 13b2bc37 2022-10-23 stsp size_t datalen;
1649 13b2bc37 2022-10-23 stsp char *packfile_path = NULL, *packidx_path = NULL;
1651 13b2bc37 2022-10-23 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1652 13b2bc37 2022-10-23 stsp if (datalen != sizeof(inst))
1653 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
1654 13b2bc37 2022-10-23 stsp memcpy(&inst, imsg->data, sizeof(inst));
1656 13b2bc37 2022-10-23 stsp if (client->packfile_path == NULL)
1657 13b2bc37 2022-10-23 stsp return got_error_msg(GOT_ERR_BAD_REQUEST,
1658 13b2bc37 2022-10-23 stsp "client has no pack file");
1659 13b2bc37 2022-10-23 stsp if (client->packidx_path == NULL)
1660 13b2bc37 2022-10-23 stsp return got_error_msg(GOT_ERR_BAD_REQUEST,
1661 13b2bc37 2022-10-23 stsp "client has no pack file index");
1663 13b2bc37 2022-10-23 stsp if (got_sha1_digest_to_str(inst.pack_sha1, hex, sizeof(hex)) == NULL)
1664 13b2bc37 2022-10-23 stsp return got_error_msg(GOT_ERR_NO_SPACE,
1665 13b2bc37 2022-10-23 stsp "could not convert pack file SHA1 to hex");
1667 13b2bc37 2022-10-23 stsp if (asprintf(&packfile_path, "/%s/%s/pack-%s.pack",
1668 13b2bc37 2022-10-23 stsp repo_path, GOT_OBJECTS_PACK_DIR, hex) == -1) {
1669 13b2bc37 2022-10-23 stsp err = got_error_from_errno("asprintf");
1670 13b2bc37 2022-10-23 stsp goto done;
1673 13b2bc37 2022-10-23 stsp if (asprintf(&packidx_path, "/%s/%s/pack-%s.idx",
1674 13b2bc37 2022-10-23 stsp repo_path, GOT_OBJECTS_PACK_DIR, hex) == -1) {
1675 13b2bc37 2022-10-23 stsp err = got_error_from_errno("asprintf");
1676 13b2bc37 2022-10-23 stsp goto done;
1679 13b2bc37 2022-10-23 stsp if (rename(client->packfile_path, packfile_path) == -1) {
1680 13b2bc37 2022-10-23 stsp err = got_error_from_errno3("rename", client->packfile_path,
1681 13b2bc37 2022-10-23 stsp packfile_path);
1682 13b2bc37 2022-10-23 stsp goto done;
1685 13b2bc37 2022-10-23 stsp free(client->packfile_path);
1686 13b2bc37 2022-10-23 stsp client->packfile_path = NULL;
1688 13b2bc37 2022-10-23 stsp if (rename(client->packidx_path, packidx_path) == -1) {
1689 13b2bc37 2022-10-23 stsp err = got_error_from_errno3("rename", client->packidx_path,
1690 13b2bc37 2022-10-23 stsp packidx_path);
1691 13b2bc37 2022-10-23 stsp goto done;
1694 13b2bc37 2022-10-23 stsp free(client->packidx_path);
1695 13b2bc37 2022-10-23 stsp client->packidx_path = NULL;
1697 13b2bc37 2022-10-23 stsp free(packfile_path);
1698 13b2bc37 2022-10-23 stsp free(packidx_path);
1699 13b2bc37 2022-10-23 stsp return err;
1702 13b2bc37 2022-10-23 stsp static const struct got_error *
1703 13b2bc37 2022-10-23 stsp begin_ref_updates(struct gotd_client *client, struct imsg *imsg)
1705 13b2bc37 2022-10-23 stsp struct gotd_imsg_ref_updates_start istart;
1706 13b2bc37 2022-10-23 stsp size_t datalen;
1708 13b2bc37 2022-10-23 stsp if (client->nref_updates != -1)
1709 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_PRIVSEP_MSG);
1711 13b2bc37 2022-10-23 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1712 13b2bc37 2022-10-23 stsp if (datalen != sizeof(istart))
1713 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
1714 13b2bc37 2022-10-23 stsp memcpy(&istart, imsg->data, sizeof(istart));
1716 13b2bc37 2022-10-23 stsp if (istart.nref_updates <= 0)
1717 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_PRIVSEP_MSG);
1719 13b2bc37 2022-10-23 stsp client->nref_updates = istart.nref_updates;
1720 13b2bc37 2022-10-23 stsp return NULL;
1723 13b2bc37 2022-10-23 stsp static const struct got_error *
1724 13b2bc37 2022-10-23 stsp update_ref(struct gotd_client *client, const char *repo_path,
1725 13b2bc37 2022-10-23 stsp struct imsg *imsg)
1727 13b2bc37 2022-10-23 stsp const struct got_error *err = NULL;
1728 13b2bc37 2022-10-23 stsp struct got_repository *repo = NULL;
1729 13b2bc37 2022-10-23 stsp struct got_reference *ref = NULL;
1730 13b2bc37 2022-10-23 stsp struct gotd_imsg_ref_update iref;
1731 13b2bc37 2022-10-23 stsp struct got_object_id old_id, new_id;
1732 13b2bc37 2022-10-23 stsp struct got_object_id *id = NULL;
1733 13b2bc37 2022-10-23 stsp struct got_object *obj = NULL;
1734 13b2bc37 2022-10-23 stsp char *refname = NULL;
1735 13b2bc37 2022-10-23 stsp size_t datalen;
1736 13b2bc37 2022-10-23 stsp int locked = 0;
1738 13b2bc37 2022-10-23 stsp log_debug("update-ref from uid %d", client->euid);
1740 13b2bc37 2022-10-23 stsp if (client->nref_updates <= 0)
1741 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_PRIVSEP_MSG);
1743 13b2bc37 2022-10-23 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1744 13b2bc37 2022-10-23 stsp if (datalen < sizeof(iref))
1745 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
1746 13b2bc37 2022-10-23 stsp memcpy(&iref, imsg->data, sizeof(iref));
1747 13b2bc37 2022-10-23 stsp if (datalen != sizeof(iref) + iref.name_len)
1748 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
1749 13b2bc37 2022-10-23 stsp refname = malloc(iref.name_len + 1);
1750 13b2bc37 2022-10-23 stsp if (refname == NULL)
1751 13b2bc37 2022-10-23 stsp return got_error_from_errno("malloc");
1752 13b2bc37 2022-10-23 stsp memcpy(refname, imsg->data + sizeof(iref), iref.name_len);
1753 13b2bc37 2022-10-23 stsp refname[iref.name_len] = '\0';
1755 13b2bc37 2022-10-23 stsp log_debug("updating ref %s for uid %d", refname, client->euid);
1757 13b2bc37 2022-10-23 stsp err = got_repo_open(&repo, repo_path, NULL, NULL);
1759 13b2bc37 2022-10-23 stsp goto done;
1761 13b2bc37 2022-10-23 stsp memcpy(old_id.sha1, iref.old_id, SHA1_DIGEST_LENGTH);
1762 13b2bc37 2022-10-23 stsp memcpy(new_id.sha1, iref.new_id, SHA1_DIGEST_LENGTH);
1763 13b2bc37 2022-10-23 stsp err = got_object_open(&obj, repo, &new_id);
1765 13b2bc37 2022-10-23 stsp goto done;
1767 13b2bc37 2022-10-23 stsp if (iref.ref_is_new) {
1768 13b2bc37 2022-10-23 stsp err = got_ref_open(&ref, repo, refname, 0);
1769 13b2bc37 2022-10-23 stsp if (err) {
1770 13b2bc37 2022-10-23 stsp if (err->code != GOT_ERR_NOT_REF)
1771 13b2bc37 2022-10-23 stsp goto done;
1772 13b2bc37 2022-10-23 stsp err = got_ref_alloc(&ref, refname, &new_id);
1774 13b2bc37 2022-10-23 stsp goto done;
1775 13b2bc37 2022-10-23 stsp err = got_ref_write(ref, repo); /* will lock/unlock */
1777 13b2bc37 2022-10-23 stsp goto done;
1779 13b2bc37 2022-10-23 stsp err = got_error_fmt(GOT_ERR_REF_BUSY,
1780 13b2bc37 2022-10-23 stsp "%s has been created by someone else "
1781 13b2bc37 2022-10-23 stsp "while transaction was in progress",
1782 13b2bc37 2022-10-23 stsp got_ref_get_name(ref));
1783 13b2bc37 2022-10-23 stsp goto done;
1786 13b2bc37 2022-10-23 stsp err = got_ref_open(&ref, repo, refname, 1 /* lock */);
1788 13b2bc37 2022-10-23 stsp goto done;
1789 13b2bc37 2022-10-23 stsp locked = 1;
1791 13b2bc37 2022-10-23 stsp err = got_ref_resolve(&id, repo, ref);
1793 13b2bc37 2022-10-23 stsp goto done;
1795 13b2bc37 2022-10-23 stsp if (got_object_id_cmp(id, &old_id) != 0) {
1796 13b2bc37 2022-10-23 stsp err = got_error_fmt(GOT_ERR_REF_BUSY,
1797 13b2bc37 2022-10-23 stsp "%s has been modified by someone else "
1798 13b2bc37 2022-10-23 stsp "while transaction was in progress",
1799 13b2bc37 2022-10-23 stsp got_ref_get_name(ref));
1800 13b2bc37 2022-10-23 stsp goto done;
1803 13b2bc37 2022-10-23 stsp err = got_ref_change_ref(ref, &new_id);
1805 13b2bc37 2022-10-23 stsp goto done;
1807 13b2bc37 2022-10-23 stsp err = got_ref_write(ref, repo);
1809 13b2bc37 2022-10-23 stsp goto done;
1812 13b2bc37 2022-10-23 stsp id = NULL;
1815 13b2bc37 2022-10-23 stsp if (err) {
1816 13b2bc37 2022-10-23 stsp if (err->code == GOT_ERR_LOCKFILE_TIMEOUT) {
1817 13b2bc37 2022-10-23 stsp err = got_error_fmt(GOT_ERR_LOCKFILE_TIMEOUT,
1818 13b2bc37 2022-10-23 stsp "could not acquire exclusive file lock for %s",
1821 13b2bc37 2022-10-23 stsp send_ref_update_ng(client, &iref, refname, err->msg);
1823 13b2bc37 2022-10-23 stsp send_ref_update_ok(client, &iref, refname);
1825 13b2bc37 2022-10-23 stsp if (client->nref_updates > 0) {
1826 13b2bc37 2022-10-23 stsp client->nref_updates--;
1827 13b2bc37 2022-10-23 stsp if (client->nref_updates == 0)
1828 13b2bc37 2022-10-23 stsp send_refs_updated(client);
1831 13b2bc37 2022-10-23 stsp if (locked) {
1832 13b2bc37 2022-10-23 stsp const struct got_error *unlock_err;
1833 13b2bc37 2022-10-23 stsp unlock_err = got_ref_unlock(ref);
1834 13b2bc37 2022-10-23 stsp if (unlock_err && err == NULL)
1835 13b2bc37 2022-10-23 stsp err = unlock_err;
1838 13b2bc37 2022-10-23 stsp got_ref_close(ref);
1840 13b2bc37 2022-10-23 stsp got_object_close(obj);
1842 13b2bc37 2022-10-23 stsp got_repo_close(repo);
1843 13b2bc37 2022-10-23 stsp free(refname);
1845 13b2bc37 2022-10-23 stsp return err;
1848 13b2bc37 2022-10-23 stsp static void
1849 b50a2b46 2022-12-29 stsp gotd_dispatch_listener(int fd, short event, void *arg)
1851 13b2bc37 2022-10-23 stsp struct gotd_imsgev *iev = arg;
1852 13b2bc37 2022-10-23 stsp struct imsgbuf *ibuf = &iev->ibuf;
1853 b50a2b46 2022-12-29 stsp struct gotd_child_proc *proc = &gotd.listen_proc;
1854 b50a2b46 2022-12-29 stsp ssize_t n;
1855 b50a2b46 2022-12-29 stsp int shut = 0;
1856 b50a2b46 2022-12-29 stsp struct imsg imsg;
1858 b50a2b46 2022-12-29 stsp if (proc->iev.ibuf.fd != fd)
1859 b50a2b46 2022-12-29 stsp fatalx("%s: unexpected fd %d", __func__, fd);
1861 b50a2b46 2022-12-29 stsp if (event & EV_READ) {
1862 b50a2b46 2022-12-29 stsp if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
1863 b50a2b46 2022-12-29 stsp fatal("imsg_read error");
1864 b50a2b46 2022-12-29 stsp if (n == 0) {
1865 b50a2b46 2022-12-29 stsp /* Connection closed. */
1867 b50a2b46 2022-12-29 stsp goto done;
1871 b50a2b46 2022-12-29 stsp if (event & EV_WRITE) {
1872 b50a2b46 2022-12-29 stsp n = msgbuf_write(&ibuf->w);
1873 b50a2b46 2022-12-29 stsp if (n == -1 && errno != EAGAIN)
1874 b50a2b46 2022-12-29 stsp fatal("msgbuf_write");
1875 b50a2b46 2022-12-29 stsp if (n == 0) {
1876 b50a2b46 2022-12-29 stsp /* Connection closed. */
1878 b50a2b46 2022-12-29 stsp goto done;
1882 b50a2b46 2022-12-29 stsp for (;;) {
1883 b50a2b46 2022-12-29 stsp const struct got_error *err = NULL;
1884 b50a2b46 2022-12-29 stsp struct gotd_client *client = NULL;
1885 b50a2b46 2022-12-29 stsp uint32_t client_id = 0;
1886 b50a2b46 2022-12-29 stsp int do_disconnect = 0;
1888 b50a2b46 2022-12-29 stsp if ((n = imsg_get(ibuf, &imsg)) == -1)
1889 b50a2b46 2022-12-29 stsp fatal("%s: imsg_get error", __func__);
1890 b50a2b46 2022-12-29 stsp if (n == 0) /* No more messages. */
1893 b50a2b46 2022-12-29 stsp switch (imsg.hdr.type) {
1894 b50a2b46 2022-12-29 stsp case GOTD_IMSG_ERROR:
1895 b50a2b46 2022-12-29 stsp do_disconnect = 1;
1896 b50a2b46 2022-12-29 stsp err = gotd_imsg_recv_error(&client_id, &imsg);
1898 b50a2b46 2022-12-29 stsp case GOTD_IMSG_CONNECT:
1899 b50a2b46 2022-12-29 stsp err = recv_connect(&client_id, &imsg);
1902 b50a2b46 2022-12-29 stsp log_debug("unexpected imsg %d", imsg.hdr.type);
1906 b50a2b46 2022-12-29 stsp client = find_client(client_id);
1907 b50a2b46 2022-12-29 stsp if (client == NULL) {
1908 b50a2b46 2022-12-29 stsp log_warnx("%s: client not found", __func__);
1909 b50a2b46 2022-12-29 stsp imsg_free(&imsg);
1914 b50a2b46 2022-12-29 stsp log_warnx("uid %d: %s", client->euid, err->msg);
1916 b50a2b46 2022-12-29 stsp if (do_disconnect) {
1918 b50a2b46 2022-12-29 stsp disconnect_on_error(client, err);
1920 b50a2b46 2022-12-29 stsp disconnect(client);
1923 b50a2b46 2022-12-29 stsp imsg_free(&imsg);
1926 b50a2b46 2022-12-29 stsp if (!shut) {
1927 b50a2b46 2022-12-29 stsp gotd_imsg_event_add(iev);
1929 b50a2b46 2022-12-29 stsp /* This pipe is dead. Remove its event handler */
1930 b50a2b46 2022-12-29 stsp event_del(&iev->ev);
1931 b50a2b46 2022-12-29 stsp event_loopexit(NULL);
1935 b50a2b46 2022-12-29 stsp static void
1936 5e25db14 2022-12-29 stsp gotd_dispatch_auth_child(int fd, short event, void *arg)
1938 5e25db14 2022-12-29 stsp const struct got_error *err = NULL;
1939 5e25db14 2022-12-29 stsp struct gotd_imsgev *iev = arg;
1940 5e25db14 2022-12-29 stsp struct imsgbuf *ibuf = &iev->ibuf;
1941 5e25db14 2022-12-29 stsp struct gotd_client *client;
1942 5e25db14 2022-12-29 stsp struct gotd_repo *repo = NULL;
1943 5e25db14 2022-12-29 stsp ssize_t n;
1944 5e25db14 2022-12-29 stsp int shut = 0;
1945 5e25db14 2022-12-29 stsp struct imsg imsg;
1946 5e25db14 2022-12-29 stsp uint32_t client_id = 0;
1947 5e25db14 2022-12-29 stsp int do_disconnect = 0;
1948 5e25db14 2022-12-29 stsp enum gotd_procid proc_type;
1950 5e25db14 2022-12-29 stsp client = find_client_by_proc_fd(fd);
1951 5e25db14 2022-12-29 stsp if (client == NULL)
1952 5e25db14 2022-12-29 stsp fatalx("cannot find client for fd %d", fd);
1954 5e25db14 2022-12-29 stsp if (client->auth == NULL)
1955 5e25db14 2022-12-29 stsp fatalx("cannot find auth child process for fd %d", fd);
1957 5e25db14 2022-12-29 stsp if (event & EV_READ) {
1958 5e25db14 2022-12-29 stsp if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
1959 5e25db14 2022-12-29 stsp fatal("imsg_read error");
1960 5e25db14 2022-12-29 stsp if (n == 0) {
1961 5e25db14 2022-12-29 stsp /* Connection closed. */
1963 5e25db14 2022-12-29 stsp goto done;
1967 5e25db14 2022-12-29 stsp if (event & EV_WRITE) {
1968 5e25db14 2022-12-29 stsp n = msgbuf_write(&ibuf->w);
1969 5e25db14 2022-12-29 stsp if (n == -1 && errno != EAGAIN)
1970 5e25db14 2022-12-29 stsp fatal("msgbuf_write");
1971 5e25db14 2022-12-29 stsp if (n == 0) {
1972 5e25db14 2022-12-29 stsp /* Connection closed. */
1975 5e25db14 2022-12-29 stsp goto done;
1978 5e25db14 2022-12-29 stsp if (client->auth->iev.ibuf.fd != fd)
1979 5e25db14 2022-12-29 stsp fatalx("%s: unexpected fd %d", __func__, fd);
1981 5e25db14 2022-12-29 stsp if ((n = imsg_get(ibuf, &imsg)) == -1)
1982 5e25db14 2022-12-29 stsp fatal("%s: imsg_get error", __func__);
1983 5e25db14 2022-12-29 stsp if (n == 0) /* No more messages. */
1986 5e25db14 2022-12-29 stsp evtimer_del(&client->tmo);
1988 5e25db14 2022-12-29 stsp switch (imsg.hdr.type) {
1989 5e25db14 2022-12-29 stsp case GOTD_IMSG_ERROR:
1990 5e25db14 2022-12-29 stsp do_disconnect = 1;
1991 5e25db14 2022-12-29 stsp err = gotd_imsg_recv_error(&client_id, &imsg);
1993 5e25db14 2022-12-29 stsp case GOTD_IMSG_ACCESS_GRANTED:
1996 5e25db14 2022-12-29 stsp do_disconnect = 1;
1997 5e25db14 2022-12-29 stsp log_debug("unexpected imsg %d", imsg.hdr.type);
2001 5e25db14 2022-12-29 stsp if (!verify_imsg_src(client, client->auth, &imsg)) {
2002 5e25db14 2022-12-29 stsp do_disconnect = 1;
2003 5e25db14 2022-12-29 stsp log_debug("dropping imsg type %d from PID %d",
2004 5e25db14 2022-12-29 stsp imsg.hdr.type, client->auth->pid);
2006 5e25db14 2022-12-29 stsp imsg_free(&imsg);
2008 5e25db14 2022-12-29 stsp if (do_disconnect) {
2010 5e25db14 2022-12-29 stsp disconnect_on_error(client, err);
2012 5e25db14 2022-12-29 stsp disconnect(client);
2013 5e25db14 2022-12-29 stsp goto done;
2016 5e25db14 2022-12-29 stsp repo = find_repo_by_name(client->auth->repo_name);
2017 5e25db14 2022-12-29 stsp if (repo == NULL) {
2018 5e25db14 2022-12-29 stsp err = got_error(GOT_ERR_NOT_GIT_REPO);
2019 5e25db14 2022-12-29 stsp goto done;
2021 5e25db14 2022-12-29 stsp kill_auth_proc(client);
2023 5e25db14 2022-12-29 stsp log_info("authenticated uid %d for repository %s\n",
2024 5e25db14 2022-12-29 stsp client->euid, repo->name);
2026 5e25db14 2022-12-29 stsp if (client->required_auth & GOTD_AUTH_WRITE)
2027 5e25db14 2022-12-29 stsp proc_type = PROC_REPO_WRITE;
2029 5e25db14 2022-12-29 stsp proc_type = PROC_REPO_READ;
2031 7fdc3e58 2022-12-30 mark err = start_repo_child(client, proc_type, repo, gotd.argv0,
2032 7fdc3e58 2022-12-30 mark gotd.confpath, gotd.daemonize, gotd.verbosity);
2035 5e25db14 2022-12-29 stsp log_warnx("uid %d: %s", client->euid, err->msg);
2037 5e25db14 2022-12-29 stsp /* We might have killed the auth process by now. */
2038 5e25db14 2022-12-29 stsp if (client->auth != NULL) {
2039 5e25db14 2022-12-29 stsp if (!shut) {
2040 5e25db14 2022-12-29 stsp gotd_imsg_event_add(iev);
2042 5e25db14 2022-12-29 stsp /* This pipe is dead. Remove its event handler */
2043 5e25db14 2022-12-29 stsp event_del(&iev->ev);
2048 5e25db14 2022-12-29 stsp static void
2049 b50a2b46 2022-12-29 stsp gotd_dispatch_repo_child(int fd, short event, void *arg)
2051 b50a2b46 2022-12-29 stsp struct gotd_imsgev *iev = arg;
2052 b50a2b46 2022-12-29 stsp struct imsgbuf *ibuf = &iev->ibuf;
2053 13b2bc37 2022-10-23 stsp struct gotd_child_proc *proc = NULL;
2054 b50a2b46 2022-12-29 stsp struct gotd_client *client = NULL;
2055 13b2bc37 2022-10-23 stsp ssize_t n;
2056 13b2bc37 2022-10-23 stsp int shut = 0;
2057 13b2bc37 2022-10-23 stsp struct imsg imsg;
2059 13b2bc37 2022-10-23 stsp if (event & EV_READ) {
2060 13b2bc37 2022-10-23 stsp if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
2061 13b2bc37 2022-10-23 stsp fatal("imsg_read error");
2062 13b2bc37 2022-10-23 stsp if (n == 0) {
2063 13b2bc37 2022-10-23 stsp /* Connection closed. */
2065 13b2bc37 2022-10-23 stsp goto done;
2069 13b2bc37 2022-10-23 stsp if (event & EV_WRITE) {
2070 13b2bc37 2022-10-23 stsp n = msgbuf_write(&ibuf->w);
2071 13b2bc37 2022-10-23 stsp if (n == -1 && errno != EAGAIN)
2072 13b2bc37 2022-10-23 stsp fatal("msgbuf_write");
2073 13b2bc37 2022-10-23 stsp if (n == 0) {
2074 13b2bc37 2022-10-23 stsp /* Connection closed. */
2076 13b2bc37 2022-10-23 stsp goto done;
2080 b50a2b46 2022-12-29 stsp client = find_client_by_proc_fd(fd);
2081 b50a2b46 2022-12-29 stsp if (client == NULL)
2082 b50a2b46 2022-12-29 stsp fatalx("cannot find client for fd %d", fd);
2084 b50a2b46 2022-12-29 stsp proc = get_client_proc(client);
2085 13b2bc37 2022-10-23 stsp if (proc == NULL)
2086 13b2bc37 2022-10-23 stsp fatalx("cannot find child process for fd %d", fd);
2088 13b2bc37 2022-10-23 stsp for (;;) {
2089 13b2bc37 2022-10-23 stsp const struct got_error *err = NULL;
2090 13b2bc37 2022-10-23 stsp uint32_t client_id = 0;
2091 13b2bc37 2022-10-23 stsp int do_disconnect = 0;
2092 b50a2b46 2022-12-29 stsp int do_list_refs = 0, do_ref_updates = 0, do_ref_update = 0;
2093 13b2bc37 2022-10-23 stsp int do_packfile_install = 0;
2095 13b2bc37 2022-10-23 stsp if ((n = imsg_get(ibuf, &imsg)) == -1)
2096 13b2bc37 2022-10-23 stsp fatal("%s: imsg_get error", __func__);
2097 13b2bc37 2022-10-23 stsp if (n == 0) /* No more messages. */
2100 13b2bc37 2022-10-23 stsp switch (imsg.hdr.type) {
2101 13b2bc37 2022-10-23 stsp case GOTD_IMSG_ERROR:
2102 13b2bc37 2022-10-23 stsp do_disconnect = 1;
2103 13b2bc37 2022-10-23 stsp err = gotd_imsg_recv_error(&client_id, &imsg);
2105 b50a2b46 2022-12-29 stsp case GOTD_IMSG_REPO_CHILD_READY:
2106 b50a2b46 2022-12-29 stsp do_list_refs = 1;
2108 13b2bc37 2022-10-23 stsp case GOTD_IMSG_PACKFILE_DONE:
2109 13b2bc37 2022-10-23 stsp do_disconnect = 1;
2110 13b2bc37 2022-10-23 stsp err = recv_packfile_done(&client_id, &imsg);
2112 13b2bc37 2022-10-23 stsp case GOTD_IMSG_PACKFILE_INSTALL:
2113 13b2bc37 2022-10-23 stsp err = recv_packfile_install(&client_id, &imsg);
2114 13b2bc37 2022-10-23 stsp if (err == NULL)
2115 13b2bc37 2022-10-23 stsp do_packfile_install = 1;
2117 13b2bc37 2022-10-23 stsp case GOTD_IMSG_REF_UPDATES_START:
2118 13b2bc37 2022-10-23 stsp err = recv_ref_updates_start(&client_id, &imsg);
2119 13b2bc37 2022-10-23 stsp if (err == NULL)
2120 13b2bc37 2022-10-23 stsp do_ref_updates = 1;
2122 13b2bc37 2022-10-23 stsp case GOTD_IMSG_REF_UPDATE:
2123 13b2bc37 2022-10-23 stsp err = recv_ref_update(&client_id, &imsg);
2124 13b2bc37 2022-10-23 stsp if (err == NULL)
2125 13b2bc37 2022-10-23 stsp do_ref_update = 1;
2128 13b2bc37 2022-10-23 stsp log_debug("unexpected imsg %d", imsg.hdr.type);
2132 13b2bc37 2022-10-23 stsp if (!verify_imsg_src(client, proc, &imsg)) {
2133 13b2bc37 2022-10-23 stsp log_debug("dropping imsg type %d from PID %d",
2134 13b2bc37 2022-10-23 stsp imsg.hdr.type, proc->pid);
2135 13b2bc37 2022-10-23 stsp imsg_free(&imsg);
2139 13b2bc37 2022-10-23 stsp log_warnx("uid %d: %s", client->euid, err->msg);
2141 13b2bc37 2022-10-23 stsp if (do_disconnect) {
2143 13b2bc37 2022-10-23 stsp disconnect_on_error(client, err);
2145 13b2bc37 2022-10-23 stsp disconnect(client);
2147 b50a2b46 2022-12-29 stsp if (do_list_refs)
2148 b50a2b46 2022-12-29 stsp err = list_refs_request(client, iev);
2149 b50a2b46 2022-12-29 stsp else if (do_packfile_install)
2150 eec68231 2022-12-14 stsp err = install_pack(client, proc->repo_path,
2152 36c7cfbb 2022-11-04 stsp else if (do_ref_updates)
2153 36c7cfbb 2022-11-04 stsp err = begin_ref_updates(client, &imsg);
2154 36c7cfbb 2022-11-04 stsp else if (do_ref_update)
2155 eec68231 2022-12-14 stsp err = update_ref(client, proc->repo_path,
2158 36c7cfbb 2022-11-04 stsp log_warnx("uid %d: %s", client->euid, err->msg);
2160 13b2bc37 2022-10-23 stsp imsg_free(&imsg);
2163 13b2bc37 2022-10-23 stsp if (!shut) {
2164 13b2bc37 2022-10-23 stsp gotd_imsg_event_add(iev);
2166 13b2bc37 2022-10-23 stsp /* This pipe is dead. Remove its event handler */
2167 13b2bc37 2022-10-23 stsp event_del(&iev->ev);
2168 13b2bc37 2022-10-23 stsp event_loopexit(NULL);
2172 13b2bc37 2022-10-23 stsp static pid_t
2173 eec68231 2022-12-14 stsp start_child(enum gotd_procid proc_id, const char *repo_path,
2174 585362fd 2022-10-31 op char *argv0, const char *confpath, int fd, int daemonize, int verbosity)
2176 585362fd 2022-10-31 op char *argv[11];
2177 13b2bc37 2022-10-23 stsp int argc = 0;
2178 13b2bc37 2022-10-23 stsp pid_t pid;
2180 13b2bc37 2022-10-23 stsp switch (pid = fork()) {
2182 13b2bc37 2022-10-23 stsp fatal("cannot fork");
2186 13b2bc37 2022-10-23 stsp close(fd);
2187 13b2bc37 2022-10-23 stsp return pid;
2190 8c6fc146 2022-11-17 stsp if (fd != GOTD_FILENO_MSG_PIPE) {
2191 8c6fc146 2022-11-17 stsp if (dup2(fd, GOTD_FILENO_MSG_PIPE) == -1)
2192 13b2bc37 2022-10-23 stsp fatal("cannot setup imsg fd");
2193 13b2bc37 2022-10-23 stsp } else if (fcntl(fd, F_SETFD, 0) == -1)
2194 13b2bc37 2022-10-23 stsp fatal("cannot setup imsg fd");
2196 13b2bc37 2022-10-23 stsp argv[argc++] = argv0;
2197 13b2bc37 2022-10-23 stsp switch (proc_id) {
2198 d93ecf7d 2022-12-14 stsp case PROC_LISTEN:
2199 d93ecf7d 2022-12-14 stsp argv[argc++] = (char *)"-L";
2201 5e25db14 2022-12-29 stsp case PROC_AUTH:
2202 5e25db14 2022-12-29 stsp argv[argc++] = (char *)"-A";
2204 13b2bc37 2022-10-23 stsp case PROC_REPO_READ:
2205 13b2bc37 2022-10-23 stsp argv[argc++] = (char *)"-R";
2207 13b2bc37 2022-10-23 stsp case PROC_REPO_WRITE:
2208 13b2bc37 2022-10-23 stsp argv[argc++] = (char *)"-W";
2211 13b2bc37 2022-10-23 stsp fatalx("invalid process id %d", proc_id);
2214 585362fd 2022-10-31 op argv[argc++] = (char *)"-f";
2215 585362fd 2022-10-31 op argv[argc++] = (char *)confpath;
2217 eec68231 2022-12-14 stsp if (repo_path) {
2218 d93ecf7d 2022-12-14 stsp argv[argc++] = (char *)"-P";
2219 eec68231 2022-12-14 stsp argv[argc++] = (char *)repo_path;
2222 13b2bc37 2022-10-23 stsp if (!daemonize)
2223 13b2bc37 2022-10-23 stsp argv[argc++] = (char *)"-d";
2224 13b2bc37 2022-10-23 stsp if (verbosity > 0)
2225 13b2bc37 2022-10-23 stsp argv[argc++] = (char *)"-v";
2226 13b2bc37 2022-10-23 stsp if (verbosity > 1)
2227 13b2bc37 2022-10-23 stsp argv[argc++] = (char *)"-v";
2228 13b2bc37 2022-10-23 stsp argv[argc++] = NULL;
2230 13b2bc37 2022-10-23 stsp execvp(argv0, argv);
2231 13b2bc37 2022-10-23 stsp fatal("execvp");
2234 13b2bc37 2022-10-23 stsp static void
2235 d93ecf7d 2022-12-14 stsp start_listener(char *argv0, const char *confpath, int daemonize, int verbosity)
2237 b50a2b46 2022-12-29 stsp struct gotd_child_proc *proc = &gotd.listen_proc;
2239 d93ecf7d 2022-12-14 stsp proc->type = PROC_LISTEN;
2241 d93ecf7d 2022-12-14 stsp if (socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK,
2242 d93ecf7d 2022-12-14 stsp PF_UNSPEC, proc->pipe) == -1)
2243 d93ecf7d 2022-12-14 stsp fatal("socketpair");
2245 d93ecf7d 2022-12-14 stsp proc->pid = start_child(proc->type, NULL, argv0, confpath,
2246 d93ecf7d 2022-12-14 stsp proc->pipe[1], daemonize, verbosity);
2247 d93ecf7d 2022-12-14 stsp imsg_init(&proc->iev.ibuf, proc->pipe[0]);
2248 b50a2b46 2022-12-29 stsp proc->iev.handler = gotd_dispatch_listener;
2249 d93ecf7d 2022-12-14 stsp proc->iev.events = EV_READ;
2250 d93ecf7d 2022-12-14 stsp proc->iev.handler_arg = NULL;
2253 b50a2b46 2022-12-29 stsp static const struct got_error *
2254 b50a2b46 2022-12-29 stsp start_repo_child(struct gotd_client *client, enum gotd_procid proc_type,
2255 b50a2b46 2022-12-29 stsp struct gotd_repo *repo, char *argv0, const char *confpath,
2256 585362fd 2022-10-31 op int daemonize, int verbosity)
2258 13b2bc37 2022-10-23 stsp struct gotd_child_proc *proc;
2260 b50a2b46 2022-12-29 stsp if (proc_type != PROC_REPO_READ && proc_type != PROC_REPO_WRITE)
2261 b50a2b46 2022-12-29 stsp return got_error_msg(GOT_ERR_NOT_IMPL, "bad process type");
2263 b50a2b46 2022-12-29 stsp proc = calloc(1, sizeof(*proc));
2264 b50a2b46 2022-12-29 stsp if (proc == NULL)
2265 b50a2b46 2022-12-29 stsp return got_error_from_errno("calloc");
2267 b50a2b46 2022-12-29 stsp proc->type = proc_type;
2268 b50a2b46 2022-12-29 stsp if (strlcpy(proc->repo_name, repo->name,
2269 b50a2b46 2022-12-29 stsp sizeof(proc->repo_name)) >= sizeof(proc->repo_name))
2270 b50a2b46 2022-12-29 stsp fatalx("repository name too long: %s", repo->name);
2271 b50a2b46 2022-12-29 stsp log_debug("starting %s for repository %s",
2272 b50a2b46 2022-12-29 stsp proc->type == PROC_REPO_READ ? "reader" : "writer", repo->name);
2273 b50a2b46 2022-12-29 stsp if (realpath(repo->path, proc->repo_path) == NULL)
2274 b50a2b46 2022-12-29 stsp fatal("%s", repo->path);
2275 b50a2b46 2022-12-29 stsp if (socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK,
2276 b50a2b46 2022-12-29 stsp PF_UNSPEC, proc->pipe) == -1)
2277 b50a2b46 2022-12-29 stsp fatal("socketpair");
2278 b50a2b46 2022-12-29 stsp proc->pid = start_child(proc->type, proc->repo_path, argv0,
2279 b50a2b46 2022-12-29 stsp confpath, proc->pipe[1], daemonize, verbosity);
2280 b50a2b46 2022-12-29 stsp imsg_init(&proc->iev.ibuf, proc->pipe[0]);
2281 b50a2b46 2022-12-29 stsp log_debug("proc %s %s is on fd %d",
2282 b50a2b46 2022-12-29 stsp gotd_proc_names[proc->type], proc->repo_path,
2283 b50a2b46 2022-12-29 stsp proc->pipe[0]);
2284 b50a2b46 2022-12-29 stsp proc->iev.handler = gotd_dispatch_repo_child;
2285 b50a2b46 2022-12-29 stsp proc->iev.events = EV_READ;
2286 b50a2b46 2022-12-29 stsp proc->iev.handler_arg = NULL;
2287 b50a2b46 2022-12-29 stsp event_set(&proc->iev.ev, proc->iev.ibuf.fd, EV_READ,
2288 b50a2b46 2022-12-29 stsp gotd_dispatch_repo_child, &proc->iev);
2289 b50a2b46 2022-12-29 stsp gotd_imsg_event_add(&proc->iev);
2291 b50a2b46 2022-12-29 stsp if (proc->type == PROC_REPO_READ)
2292 b50a2b46 2022-12-29 stsp client->repo_read = proc;
2294 b50a2b46 2022-12-29 stsp client->repo_write = proc;
2296 5e25db14 2022-12-29 stsp return NULL;
2299 5e25db14 2022-12-29 stsp static const struct got_error *
2300 5e25db14 2022-12-29 stsp start_auth_child(struct gotd_client *client, int required_auth,
2301 5e25db14 2022-12-29 stsp struct gotd_repo *repo, char *argv0, const char *confpath,
2302 5e25db14 2022-12-29 stsp int daemonize, int verbosity)
2304 365cf0f3 2022-12-29 stsp const struct got_error *err = NULL;
2305 5e25db14 2022-12-29 stsp struct gotd_child_proc *proc;
2306 5e25db14 2022-12-29 stsp struct gotd_imsg_auth iauth;
2309 5e25db14 2022-12-29 stsp memset(&iauth, 0, sizeof(iauth));
2311 365cf0f3 2022-12-29 stsp fd = dup(client->fd);
2312 365cf0f3 2022-12-29 stsp if (fd == -1)
2313 365cf0f3 2022-12-29 stsp return got_error_from_errno("dup");
2315 5e25db14 2022-12-29 stsp proc = calloc(1, sizeof(*proc));
2316 365cf0f3 2022-12-29 stsp if (proc == NULL) {
2317 365cf0f3 2022-12-29 stsp err = got_error_from_errno("calloc");
2318 365cf0f3 2022-12-29 stsp close(fd);
2319 365cf0f3 2022-12-29 stsp return err;
2322 5e25db14 2022-12-29 stsp proc->type = PROC_AUTH;
2323 5e25db14 2022-12-29 stsp if (strlcpy(proc->repo_name, repo->name,
2324 5e25db14 2022-12-29 stsp sizeof(proc->repo_name)) >= sizeof(proc->repo_name))
2325 5e25db14 2022-12-29 stsp fatalx("repository name too long: %s", repo->name);
2326 5e25db14 2022-12-29 stsp log_debug("starting auth for uid %d repository %s",
2327 5e25db14 2022-12-29 stsp client->euid, repo->name);
2328 5e25db14 2022-12-29 stsp if (realpath(repo->path, proc->repo_path) == NULL)
2329 5e25db14 2022-12-29 stsp fatal("%s", repo->path);
2330 5e25db14 2022-12-29 stsp if (socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK,
2331 5e25db14 2022-12-29 stsp PF_UNSPEC, proc->pipe) == -1)
2332 5e25db14 2022-12-29 stsp fatal("socketpair");
2333 5e25db14 2022-12-29 stsp proc->pid = start_child(proc->type, proc->repo_path, argv0,
2334 5e25db14 2022-12-29 stsp confpath, proc->pipe[1], daemonize, verbosity);
2335 5e25db14 2022-12-29 stsp imsg_init(&proc->iev.ibuf, proc->pipe[0]);
2336 5e25db14 2022-12-29 stsp log_debug("proc %s %s is on fd %d",
2337 5e25db14 2022-12-29 stsp gotd_proc_names[proc->type], proc->repo_path,
2338 5e25db14 2022-12-29 stsp proc->pipe[0]);
2339 5e25db14 2022-12-29 stsp proc->iev.handler = gotd_dispatch_auth_child;
2340 5e25db14 2022-12-29 stsp proc->iev.events = EV_READ;
2341 5e25db14 2022-12-29 stsp proc->iev.handler_arg = NULL;
2342 5e25db14 2022-12-29 stsp event_set(&proc->iev.ev, proc->iev.ibuf.fd, EV_READ,
2343 5e25db14 2022-12-29 stsp gotd_dispatch_auth_child, &proc->iev);
2344 5e25db14 2022-12-29 stsp gotd_imsg_event_add(&proc->iev);
2346 5e25db14 2022-12-29 stsp iauth.euid = client->euid;
2347 5e25db14 2022-12-29 stsp iauth.egid = client->egid;
2348 5e25db14 2022-12-29 stsp iauth.required_auth = required_auth;
2349 5e25db14 2022-12-29 stsp iauth.client_id = client->id;
2350 5e25db14 2022-12-29 stsp if (gotd_imsg_compose_event(&proc->iev, GOTD_IMSG_AUTHENTICATE,
2351 365cf0f3 2022-12-29 stsp PROC_GOTD, fd, &iauth, sizeof(iauth)) == -1) {
2352 5e25db14 2022-12-29 stsp log_warn("imsg compose AUTHENTICATE");
2353 365cf0f3 2022-12-29 stsp close(fd);
2354 365cf0f3 2022-12-29 stsp /* Let the auth_timeout handler tidy up. */
2357 5e25db14 2022-12-29 stsp client->auth = proc;
2358 5e25db14 2022-12-29 stsp client->required_auth = required_auth;
2359 b50a2b46 2022-12-29 stsp return NULL;
2362 eec68231 2022-12-14 stsp static void
2363 eec68231 2022-12-14 stsp apply_unveil_repo_readonly(const char *repo_path)
2365 eec68231 2022-12-14 stsp if (unveil(repo_path, "r") == -1)
2366 eec68231 2022-12-14 stsp fatal("unveil %s", repo_path);
2368 44587340 2022-12-30 stsp if (unveil(NULL, NULL) == -1)
2369 44587340 2022-12-30 stsp fatal("unveil");
2372 44587340 2022-12-30 stsp static void
2373 44587340 2022-12-30 stsp apply_unveil_none(void)
2375 44587340 2022-12-30 stsp if (unveil("/", "") == -1)
2376 44587340 2022-12-30 stsp fatal("unveil");
2378 eec68231 2022-12-14 stsp if (unveil(NULL, NULL) == -1)
2379 eec68231 2022-12-14 stsp fatal("unveil");
2382 13b2bc37 2022-10-23 stsp static void
2383 13b2bc37 2022-10-23 stsp apply_unveil(void)
2385 13b2bc37 2022-10-23 stsp struct gotd_repo *repo;
2387 b50a2b46 2022-12-29 stsp if (unveil(gotd.argv0, "x") == -1)
2388 b50a2b46 2022-12-29 stsp fatal("unveil %s", gotd.argv0);
2390 13b2bc37 2022-10-23 stsp TAILQ_FOREACH(repo, &gotd.repos, entry) {
2391 13b2bc37 2022-10-23 stsp if (unveil(repo->path, "rwc") == -1)
2392 13b2bc37 2022-10-23 stsp fatal("unveil %s", repo->path);
2395 13b2bc37 2022-10-23 stsp if (unveil(GOT_TMPDIR_STR, "rwc") == -1)
2396 13b2bc37 2022-10-23 stsp fatal("unveil %s", GOT_TMPDIR_STR);
2398 13b2bc37 2022-10-23 stsp if (unveil(NULL, NULL) == -1)
2399 13b2bc37 2022-10-23 stsp fatal("unveil");
2403 13b2bc37 2022-10-23 stsp main(int argc, char **argv)
2405 13b2bc37 2022-10-23 stsp const struct got_error *error = NULL;
2406 13b2bc37 2022-10-23 stsp int ch, fd = -1, daemonize = 1, verbosity = 0, noaction = 0;
2407 13b2bc37 2022-10-23 stsp const char *confpath = GOTD_CONF_PATH;
2408 13b2bc37 2022-10-23 stsp char *argv0 = argv[0];
2409 13b2bc37 2022-10-23 stsp char title[2048];
2410 ddbe612c 2022-11-17 stsp gid_t groups[NGROUPS_MAX];
2411 0ccf3acb 2022-11-16 stsp int ngroups = NGROUPS_MAX;
2412 13b2bc37 2022-10-23 stsp struct passwd *pw = NULL;
2413 13b2bc37 2022-10-23 stsp struct group *gr = NULL;
2414 13b2bc37 2022-10-23 stsp char *repo_path = NULL;
2415 13b2bc37 2022-10-23 stsp enum gotd_procid proc_id = PROC_GOTD;
2416 13b2bc37 2022-10-23 stsp struct event evsigint, evsigterm, evsighup, evsigusr1;
2417 13b2bc37 2022-10-23 stsp int *pack_fds = NULL, *temp_fds = NULL;
2419 13b2bc37 2022-10-23 stsp log_init(1, LOG_DAEMON); /* Log to stderr until daemonized. */
2421 5e25db14 2022-12-29 stsp while ((ch = getopt(argc, argv, "Adf:LnP:RvW")) != -1) {
2422 13b2bc37 2022-10-23 stsp switch (ch) {
2424 5e25db14 2022-12-29 stsp proc_id = PROC_AUTH;
2427 13b2bc37 2022-10-23 stsp daemonize = 0;
2430 13b2bc37 2022-10-23 stsp confpath = optarg;
2433 d93ecf7d 2022-12-14 stsp proc_id = PROC_LISTEN;
2436 13b2bc37 2022-10-23 stsp noaction = 1;
2439 6f319063 2022-10-27 stsp repo_path = realpath(optarg, NULL);
2440 6f319063 2022-10-27 stsp if (repo_path == NULL)
2441 6f319063 2022-10-27 stsp fatal("realpath '%s'", optarg);
2444 13b2bc37 2022-10-23 stsp proc_id = PROC_REPO_READ;
2447 6f319063 2022-10-27 stsp if (verbosity < 3)
2448 6f319063 2022-10-27 stsp verbosity++;
2451 13b2bc37 2022-10-23 stsp proc_id = PROC_REPO_WRITE;
2458 13b2bc37 2022-10-23 stsp argc -= optind;
2459 13b2bc37 2022-10-23 stsp argv += optind;
2461 13b2bc37 2022-10-23 stsp if (argc != 0)
2464 b50a2b46 2022-12-29 stsp /* Require an absolute path in argv[0] for reliable re-exec. */
2465 b50a2b46 2022-12-29 stsp if (!got_path_is_absolute(argv0))
2466 b50a2b46 2022-12-29 stsp fatalx("bad path \"%s\": must be an absolute path", argv0);
2468 b50a2b46 2022-12-29 stsp if (geteuid() && (proc_id == PROC_GOTD || proc_id == PROC_LISTEN))
2469 13b2bc37 2022-10-23 stsp fatalx("need root privileges");
2471 13b2bc37 2022-10-23 stsp log_init(daemonize ? 0 : 1, LOG_DAEMON);
2472 13b2bc37 2022-10-23 stsp log_setverbose(verbosity);
2474 13b2bc37 2022-10-23 stsp if (parse_config(confpath, proc_id, &gotd) != 0)
2477 b50a2b46 2022-12-29 stsp gotd.argv0 = argv0;
2478 b50a2b46 2022-12-29 stsp gotd.daemonize = daemonize;
2479 b50a2b46 2022-12-29 stsp gotd.verbosity = verbosity;
2480 b50a2b46 2022-12-29 stsp gotd.confpath = confpath;
2482 13b2bc37 2022-10-23 stsp if (proc_id == PROC_GOTD &&
2483 13b2bc37 2022-10-23 stsp (gotd.nrepos == 0 || TAILQ_EMPTY(&gotd.repos)))
2484 13b2bc37 2022-10-23 stsp fatalx("no repository defined in configuration file");
2486 13b2bc37 2022-10-23 stsp pw = getpwnam(gotd.user_name);
2487 13b2bc37 2022-10-23 stsp if (pw == NULL)
2488 898c8f8f 2022-12-29 op fatalx("user %s not found", gotd.user_name);
2490 13b2bc37 2022-10-23 stsp if (pw->pw_uid == 0) {
2491 13b2bc37 2022-10-23 stsp fatalx("cannot run %s as %s: the user running %s "
2492 13b2bc37 2022-10-23 stsp "must not be the superuser",
2493 13b2bc37 2022-10-23 stsp getprogname(), pw->pw_name, getprogname());
2496 ddbe612c 2022-11-17 stsp if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups) == -1)
2497 13b2bc37 2022-10-23 stsp log_warnx("group membership list truncated");
2499 ddbe612c 2022-11-17 stsp gr = match_group(groups, ngroups, gotd.unix_group_name);
2500 13b2bc37 2022-10-23 stsp if (gr == NULL) {
2501 13b2bc37 2022-10-23 stsp fatalx("cannot start %s: the user running %s "
2502 13b2bc37 2022-10-23 stsp "must be a secondary member of group %s",
2503 13b2bc37 2022-10-23 stsp getprogname(), getprogname(), gotd.unix_group_name);
2505 13b2bc37 2022-10-23 stsp if (gr->gr_gid == pw->pw_gid) {
2506 13b2bc37 2022-10-23 stsp fatalx("cannot start %s: the user running %s "
2507 13b2bc37 2022-10-23 stsp "must be a secondary member of group %s, but "
2508 13b2bc37 2022-10-23 stsp "%s is the user's primary group",
2509 13b2bc37 2022-10-23 stsp getprogname(), getprogname(), gotd.unix_group_name,
2510 13b2bc37 2022-10-23 stsp gotd.unix_group_name);
2513 d93ecf7d 2022-12-14 stsp if (proc_id == PROC_LISTEN &&
2514 13b2bc37 2022-10-23 stsp !got_path_is_absolute(gotd.unix_socket_path))
2515 13b2bc37 2022-10-23 stsp fatalx("bad unix socket path \"%s\": must be an absolute path",
2516 13b2bc37 2022-10-23 stsp gotd.unix_socket_path);
2518 13b2bc37 2022-10-23 stsp if (noaction)
2521 b1142068 2022-12-05 stsp if (proc_id == PROC_GOTD) {
2522 d93ecf7d 2022-12-14 stsp gotd.pid = getpid();
2523 d93ecf7d 2022-12-14 stsp snprintf(title, sizeof(title), "%s", gotd_proc_names[proc_id]);
2524 d93ecf7d 2022-12-14 stsp start_listener(argv0, confpath, daemonize, verbosity);
2525 d93ecf7d 2022-12-14 stsp arc4random_buf(&clients_hash_key, sizeof(clients_hash_key));
2526 d93ecf7d 2022-12-14 stsp if (daemonize && daemon(1, 0) == -1)
2527 d93ecf7d 2022-12-14 stsp fatal("daemon");
2528 d93ecf7d 2022-12-14 stsp } else if (proc_id == PROC_LISTEN) {
2529 d93ecf7d 2022-12-14 stsp snprintf(title, sizeof(title), "%s", gotd_proc_names[proc_id]);
2530 b1142068 2022-12-05 stsp if (verbosity) {
2531 b1142068 2022-12-05 stsp log_info("socket: %s", gotd.unix_socket_path);
2532 b1142068 2022-12-05 stsp log_info("user: %s", pw->pw_name);
2533 b1142068 2022-12-05 stsp log_info("secondary group: %s", gr->gr_name);
2536 13b2bc37 2022-10-23 stsp fd = unix_socket_listen(gotd.unix_socket_path, pw->pw_uid,
2537 13b2bc37 2022-10-23 stsp gr->gr_gid);
2538 13b2bc37 2022-10-23 stsp if (fd == -1) {
2539 13b2bc37 2022-10-23 stsp fatal("cannot listen on unix socket %s",
2540 13b2bc37 2022-10-23 stsp gotd.unix_socket_path);
2542 eec68231 2022-12-14 stsp if (daemonize && daemon(0, 0) == -1)
2543 13b2bc37 2022-10-23 stsp fatal("daemon");
2544 5e25db14 2022-12-29 stsp } else if (proc_id == PROC_AUTH) {
2545 5e25db14 2022-12-29 stsp snprintf(title, sizeof(title), "%s %s",
2546 5e25db14 2022-12-29 stsp gotd_proc_names[proc_id], repo_path);
2547 5e25db14 2022-12-29 stsp if (daemonize && daemon(0, 0) == -1)
2548 5e25db14 2022-12-29 stsp fatal("daemon");
2549 13b2bc37 2022-10-23 stsp } else if (proc_id == PROC_REPO_READ || proc_id == PROC_REPO_WRITE) {
2550 13b2bc37 2022-10-23 stsp error = got_repo_pack_fds_open(&pack_fds);
2551 13b2bc37 2022-10-23 stsp if (error != NULL)
2552 13b2bc37 2022-10-23 stsp fatalx("cannot open pack tempfiles: %s", error->msg);
2553 13b2bc37 2022-10-23 stsp error = got_repo_temp_fds_open(&temp_fds);
2554 13b2bc37 2022-10-23 stsp if (error != NULL)
2555 13b2bc37 2022-10-23 stsp fatalx("cannot open pack tempfiles: %s", error->msg);
2556 13b2bc37 2022-10-23 stsp if (repo_path == NULL)
2557 13b2bc37 2022-10-23 stsp fatalx("repository path not specified");
2558 13b2bc37 2022-10-23 stsp snprintf(title, sizeof(title), "%s %s",
2559 13b2bc37 2022-10-23 stsp gotd_proc_names[proc_id], repo_path);
2560 eec68231 2022-12-14 stsp if (daemonize && daemon(0, 0) == -1)
2561 13b2bc37 2022-10-23 stsp fatal("daemon");
2563 13b2bc37 2022-10-23 stsp fatal("invalid process id %d", proc_id);
2565 13b2bc37 2022-10-23 stsp setproctitle("%s", title);
2566 13b2bc37 2022-10-23 stsp log_procinit(title);
2568 13b2bc37 2022-10-23 stsp /* Drop root privileges. */
2569 13b2bc37 2022-10-23 stsp if (setgid(pw->pw_gid) == -1)
2570 13b2bc37 2022-10-23 stsp fatal("setgid %d failed", pw->pw_gid);
2571 13b2bc37 2022-10-23 stsp if (setuid(pw->pw_uid) == -1)
2572 13b2bc37 2022-10-23 stsp fatal("setuid %d failed", pw->pw_uid);
2574 13b2bc37 2022-10-23 stsp event_init();
2576 13b2bc37 2022-10-23 stsp switch (proc_id) {
2577 13b2bc37 2022-10-23 stsp case PROC_GOTD:
2578 13b2bc37 2022-10-23 stsp #ifndef PROFILE
2579 5e25db14 2022-12-29 stsp if (pledge("stdio rpath wpath cpath proc exec "
2580 365cf0f3 2022-12-29 stsp "sendfd recvfd fattr flock unveil", NULL) == -1)
2581 13b2bc37 2022-10-23 stsp err(1, "pledge");
2584 d93ecf7d 2022-12-14 stsp case PROC_LISTEN:
2585 d93ecf7d 2022-12-14 stsp #ifndef PROFILE
2586 d93ecf7d 2022-12-14 stsp if (pledge("stdio sendfd unix", NULL) == -1)
2587 d93ecf7d 2022-12-14 stsp err(1, "pledge");
2589 d93ecf7d 2022-12-14 stsp listen_main(title, fd);
2590 d93ecf7d 2022-12-14 stsp /* NOTREACHED */
2592 5e25db14 2022-12-29 stsp case PROC_AUTH:
2593 5e25db14 2022-12-29 stsp #ifndef PROFILE
2594 44587340 2022-12-30 stsp if (pledge("stdio getpw recvfd unix unveil", NULL) == -1)
2595 5e25db14 2022-12-29 stsp err(1, "pledge");
2598 44587340 2022-12-30 stsp * We need the "unix" pledge promise for getpeername(2) only.
2599 44587340 2022-12-30 stsp * Ensure that AF_UNIX bind(2) cannot be used by revoking all
2600 44587340 2022-12-30 stsp * filesystem access via unveil(2). Access to password database
2601 44587340 2022-12-30 stsp * files will still work since "getpw" bypasses unveil(2).
2603 44587340 2022-12-30 stsp apply_unveil_none();
2605 5e25db14 2022-12-29 stsp auth_main(title, &gotd.repos, repo_path);
2606 5e25db14 2022-12-29 stsp /* NOTREACHED */
2608 13b2bc37 2022-10-23 stsp case PROC_REPO_READ:
2609 13b2bc37 2022-10-23 stsp #ifndef PROFILE
2610 eec68231 2022-12-14 stsp if (pledge("stdio rpath recvfd unveil", NULL) == -1)
2611 13b2bc37 2022-10-23 stsp err(1, "pledge");
2613 eec68231 2022-12-14 stsp apply_unveil_repo_readonly(repo_path);
2614 eec68231 2022-12-14 stsp repo_read_main(title, repo_path, pack_fds, temp_fds);
2615 13b2bc37 2022-10-23 stsp /* NOTREACHED */
2617 13b2bc37 2022-10-23 stsp case PROC_REPO_WRITE:
2618 13b2bc37 2022-10-23 stsp #ifndef PROFILE
2619 eec68231 2022-12-14 stsp if (pledge("stdio rpath recvfd unveil", NULL) == -1)
2620 13b2bc37 2022-10-23 stsp err(1, "pledge");
2622 eec68231 2022-12-14 stsp apply_unveil_repo_readonly(repo_path);
2623 eec68231 2022-12-14 stsp repo_write_main(title, repo_path, pack_fds, temp_fds);
2624 13b2bc37 2022-10-23 stsp /* NOTREACHED */
2627 13b2bc37 2022-10-23 stsp fatal("invalid process id %d", proc_id);
2630 13b2bc37 2022-10-23 stsp if (proc_id != PROC_GOTD)
2631 13b2bc37 2022-10-23 stsp fatal("invalid process id %d", proc_id);
2633 13b2bc37 2022-10-23 stsp apply_unveil();
2635 13b2bc37 2022-10-23 stsp signal_set(&evsigint, SIGINT, gotd_sighdlr, NULL);
2636 13b2bc37 2022-10-23 stsp signal_set(&evsigterm, SIGTERM, gotd_sighdlr, NULL);
2637 13b2bc37 2022-10-23 stsp signal_set(&evsighup, SIGHUP, gotd_sighdlr, NULL);
2638 13b2bc37 2022-10-23 stsp signal_set(&evsigusr1, SIGUSR1, gotd_sighdlr, NULL);
2639 13b2bc37 2022-10-23 stsp signal(SIGPIPE, SIG_IGN);
2641 13b2bc37 2022-10-23 stsp signal_add(&evsigint, NULL);
2642 13b2bc37 2022-10-23 stsp signal_add(&evsigterm, NULL);
2643 13b2bc37 2022-10-23 stsp signal_add(&evsighup, NULL);
2644 13b2bc37 2022-10-23 stsp signal_add(&evsigusr1, NULL);
2646 b50a2b46 2022-12-29 stsp gotd_imsg_event_add(&gotd.listen_proc.iev);
2648 13b2bc37 2022-10-23 stsp event_dispatch();
2650 13b2bc37 2022-10-23 stsp if (pack_fds)
2651 13b2bc37 2022-10-23 stsp got_repo_pack_fds_close(pack_fds);
2652 13b2bc37 2022-10-23 stsp free(repo_path);