2 3efd8e31 2022-10-23 thomas * Copyright (c) 2022 Stefan Sperling <stsp@openbsd.org>
4 3efd8e31 2022-10-23 thomas * Permission to use, copy, modify, and distribute this software for any
5 3efd8e31 2022-10-23 thomas * purpose with or without fee is hereby granted, provided that the above
6 3efd8e31 2022-10-23 thomas * copyright notice and this permission notice appear in all copies.
8 3efd8e31 2022-10-23 thomas * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 3efd8e31 2022-10-23 thomas * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 3efd8e31 2022-10-23 thomas * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 3efd8e31 2022-10-23 thomas * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 3efd8e31 2022-10-23 thomas * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 3efd8e31 2022-10-23 thomas * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 3efd8e31 2022-10-23 thomas * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 3efd8e31 2022-10-23 thomas #include <sys/queue.h>
18 3efd8e31 2022-10-23 thomas #include <sys/tree.h>
19 3efd8e31 2022-10-23 thomas #include <sys/time.h>
20 3efd8e31 2022-10-23 thomas #include <sys/types.h>
21 3efd8e31 2022-10-23 thomas #include <sys/stat.h>
22 3efd8e31 2022-10-23 thomas #include <sys/socket.h>
23 3efd8e31 2022-10-23 thomas #include <sys/un.h>
24 3efd8e31 2022-10-23 thomas #include <sys/wait.h>
26 3efd8e31 2022-10-23 thomas #include <fcntl.h>
27 3efd8e31 2022-10-23 thomas #include <err.h>
28 3efd8e31 2022-10-23 thomas #include <errno.h>
29 3efd8e31 2022-10-23 thomas #include <event.h>
30 3efd8e31 2022-10-23 thomas #include <limits.h>
31 3efd8e31 2022-10-23 thomas #include <pwd.h>
32 3efd8e31 2022-10-23 thomas #include <grp.h>
33 3efd8e31 2022-10-23 thomas #include <imsg.h>
34 3efd8e31 2022-10-23 thomas #include <sha1.h>
35 3efd8e31 2022-10-23 thomas #include <signal.h>
36 3efd8e31 2022-10-23 thomas #include <siphash.h>
37 3efd8e31 2022-10-23 thomas #include <stdarg.h>
38 3efd8e31 2022-10-23 thomas #include <stdio.h>
39 3efd8e31 2022-10-23 thomas #include <stdlib.h>
40 3efd8e31 2022-10-23 thomas #include <stdlib.h>
41 3efd8e31 2022-10-23 thomas #include <string.h>
42 3efd8e31 2022-10-23 thomas #include <syslog.h>
43 3efd8e31 2022-10-23 thomas #include <unistd.h>
45 3efd8e31 2022-10-23 thomas #include "got_error.h"
46 3efd8e31 2022-10-23 thomas #include "got_opentemp.h"
47 3efd8e31 2022-10-23 thomas #include "got_path.h"
48 3efd8e31 2022-10-23 thomas #include "got_repository.h"
49 3efd8e31 2022-10-23 thomas #include "got_object.h"
50 3efd8e31 2022-10-23 thomas #include "got_reference.h"
52 3efd8e31 2022-10-23 thomas #include "got_lib_delta.h"
53 3efd8e31 2022-10-23 thomas #include "got_lib_object.h"
54 3efd8e31 2022-10-23 thomas #include "got_lib_object_cache.h"
55 3efd8e31 2022-10-23 thomas #include "got_lib_sha1.h"
56 3efd8e31 2022-10-23 thomas #include "got_lib_gitproto.h"
57 3efd8e31 2022-10-23 thomas #include "got_lib_pack.h"
58 3efd8e31 2022-10-23 thomas #include "got_lib_repository.h"
60 3efd8e31 2022-10-23 thomas #include "gotd.h"
61 3efd8e31 2022-10-23 thomas #include "log.h"
62 3efd8e31 2022-10-23 thomas #include "repo_read.h"
63 3efd8e31 2022-10-23 thomas #include "repo_write.h"
65 3efd8e31 2022-10-23 thomas #ifndef nitems
66 3efd8e31 2022-10-23 thomas #define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
69 3efd8e31 2022-10-23 thomas struct gotd_client {
70 3efd8e31 2022-10-23 thomas STAILQ_ENTRY(gotd_client) entry;
71 3efd8e31 2022-10-23 thomas enum gotd_client_state state;
72 3efd8e31 2022-10-23 thomas struct gotd_client_capability *capabilities;
73 3efd8e31 2022-10-23 thomas size_t ncapa_alloc;
74 3efd8e31 2022-10-23 thomas size_t ncapabilities;
75 3efd8e31 2022-10-23 thomas uint32_t id;
77 3efd8e31 2022-10-23 thomas int delta_cache_fd;
78 3efd8e31 2022-10-23 thomas struct gotd_imsgev iev;
79 3efd8e31 2022-10-23 thomas struct event tmo;
80 3efd8e31 2022-10-23 thomas uid_t euid;
81 3efd8e31 2022-10-23 thomas gid_t egid;
82 3efd8e31 2022-10-23 thomas struct gotd_child_proc *repo_read;
83 3efd8e31 2022-10-23 thomas struct gotd_child_proc *repo_write;
84 3efd8e31 2022-10-23 thomas char *packfile_path;
85 3efd8e31 2022-10-23 thomas char *packidx_path;
86 3efd8e31 2022-10-23 thomas int nref_updates;
88 3efd8e31 2022-10-23 thomas STAILQ_HEAD(gotd_clients, gotd_client);
90 3efd8e31 2022-10-23 thomas static struct gotd_clients gotd_clients[GOTD_CLIENT_TABLE_SIZE];
91 3efd8e31 2022-10-23 thomas static SIPHASH_KEY clients_hash_key;
92 3efd8e31 2022-10-23 thomas volatile int client_cnt;
93 3efd8e31 2022-10-23 thomas static struct timeval timeout = { 3600, 0 };
94 3efd8e31 2022-10-23 thomas static int inflight;
95 3efd8e31 2022-10-23 thomas static struct gotd gotd;
97 3efd8e31 2022-10-23 thomas void gotd_sighdlr(int sig, short event, void *arg);
99 3efd8e31 2022-10-23 thomas __dead static void
102 3efd8e31 2022-10-23 thomas fprintf(stderr, "%s: [-dv] [-f config-file]\n", getprogname());
103 3efd8e31 2022-10-23 thomas exit (1);
106 3efd8e31 2022-10-23 thomas static int
107 3efd8e31 2022-10-23 thomas unix_socket_listen(const char *unix_socket_path, uid_t uid, gid_t gid)
109 3efd8e31 2022-10-23 thomas struct sockaddr_un sun;
110 3efd8e31 2022-10-23 thomas int fd = -1;
111 3efd8e31 2022-10-23 thomas mode_t old_umask, mode;
113 3efd8e31 2022-10-23 thomas fd = socket(AF_UNIX, SOCK_STREAM | SOCK_NONBLOCK| SOCK_CLOEXEC, 0);
114 3efd8e31 2022-10-23 thomas if (fd == -1) {
115 3efd8e31 2022-10-23 thomas log_warn("socket");
116 3efd8e31 2022-10-23 thomas return -1;
119 3efd8e31 2022-10-23 thomas sun.sun_family = AF_UNIX;
120 3efd8e31 2022-10-23 thomas if (strlcpy(sun.sun_path, unix_socket_path,
121 3efd8e31 2022-10-23 thomas sizeof(sun.sun_path)) >= sizeof(sun.sun_path)) {
122 3efd8e31 2022-10-23 thomas log_warnx("%s: name too long", unix_socket_path);
123 3efd8e31 2022-10-23 thomas close(fd);
124 3efd8e31 2022-10-23 thomas return -1;
127 3efd8e31 2022-10-23 thomas if (unlink(unix_socket_path) == -1) {
128 3efd8e31 2022-10-23 thomas if (errno != ENOENT) {
129 3efd8e31 2022-10-23 thomas log_warn("unlink %s", unix_socket_path);
130 3efd8e31 2022-10-23 thomas close(fd);
131 3efd8e31 2022-10-23 thomas return -1;
135 3efd8e31 2022-10-23 thomas old_umask = umask(S_IXUSR|S_IXGRP|S_IWOTH|S_IROTH|S_IXOTH);
136 3efd8e31 2022-10-23 thomas mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP;
138 3efd8e31 2022-10-23 thomas if (bind(fd, (struct sockaddr *)&sun, sizeof(sun)) == -1) {
139 3efd8e31 2022-10-23 thomas log_warn("bind: %s", unix_socket_path);
140 3efd8e31 2022-10-23 thomas close(fd);
141 3efd8e31 2022-10-23 thomas umask(old_umask);
142 3efd8e31 2022-10-23 thomas return -1;
145 3efd8e31 2022-10-23 thomas umask(old_umask);
147 3efd8e31 2022-10-23 thomas if (chmod(unix_socket_path, mode) == -1) {
148 3efd8e31 2022-10-23 thomas log_warn("chmod %o %s", mode, unix_socket_path);
149 3efd8e31 2022-10-23 thomas close(fd);
150 3efd8e31 2022-10-23 thomas unlink(unix_socket_path);
151 3efd8e31 2022-10-23 thomas return -1;
154 3efd8e31 2022-10-23 thomas if (chown(unix_socket_path, uid, gid) == -1) {
155 3efd8e31 2022-10-23 thomas log_warn("chown %s uid=%d gid=%d", unix_socket_path, uid, gid);
156 3efd8e31 2022-10-23 thomas close(fd);
157 3efd8e31 2022-10-23 thomas unlink(unix_socket_path);
158 3efd8e31 2022-10-23 thomas return -1;
161 3efd8e31 2022-10-23 thomas if (listen(fd, GOTD_UNIX_SOCKET_BACKLOG) == -1) {
162 3efd8e31 2022-10-23 thomas log_warn("listen");
163 3efd8e31 2022-10-23 thomas close(fd);
164 3efd8e31 2022-10-23 thomas unlink(unix_socket_path);
165 3efd8e31 2022-10-23 thomas return -1;
168 3efd8e31 2022-10-23 thomas return fd;
171 3efd8e31 2022-10-23 thomas static struct group *
172 3efd8e31 2022-10-23 thomas match_group(gid_t *groups, int ngroups, const char *unix_group_name)
174 3efd8e31 2022-10-23 thomas struct group *gr;
177 3efd8e31 2022-10-23 thomas for (i = 0; i < ngroups; i++) {
178 3efd8e31 2022-10-23 thomas gr = getgrgid(groups[i]);
179 3efd8e31 2022-10-23 thomas if (gr == NULL) {
180 3efd8e31 2022-10-23 thomas log_warn("getgrgid %d", groups[i]);
181 3efd8e31 2022-10-23 thomas continue;
183 3efd8e31 2022-10-23 thomas if (strcmp(gr->gr_name, unix_group_name) == 0)
184 3efd8e31 2022-10-23 thomas return gr;
187 3efd8e31 2022-10-23 thomas return NULL;
190 3efd8e31 2022-10-23 thomas static int
191 3efd8e31 2022-10-23 thomas accept_reserve(int fd, struct sockaddr *addr, socklen_t *addrlen,
192 3efd8e31 2022-10-23 thomas int reserve, volatile int *counter)
196 3efd8e31 2022-10-23 thomas if (getdtablecount() + reserve +
197 3efd8e31 2022-10-23 thomas ((*counter + 1) * GOTD_FD_NEEDED) >= getdtablesize()) {
198 3efd8e31 2022-10-23 thomas log_debug("inflight fds exceeded");
199 3efd8e31 2022-10-23 thomas errno = EMFILE;
200 3efd8e31 2022-10-23 thomas return -1;
203 3efd8e31 2022-10-23 thomas if ((ret = accept4(fd, addr, addrlen,
204 3efd8e31 2022-10-23 thomas SOCK_NONBLOCK | SOCK_CLOEXEC)) > -1) {
205 3efd8e31 2022-10-23 thomas (*counter)++;
208 3efd8e31 2022-10-23 thomas return ret;
211 3efd8e31 2022-10-23 thomas static uint64_t
212 3efd8e31 2022-10-23 thomas client_hash(uint32_t client_id)
214 3efd8e31 2022-10-23 thomas return SipHash24(&clients_hash_key, &client_id, sizeof(client_id));
217 3efd8e31 2022-10-23 thomas static void
218 3efd8e31 2022-10-23 thomas add_client(struct gotd_client *client)
220 3efd8e31 2022-10-23 thomas uint64_t slot = client_hash(client->id) % nitems(gotd_clients);
221 3efd8e31 2022-10-23 thomas STAILQ_INSERT_HEAD(&gotd_clients[slot], client, entry);
222 3efd8e31 2022-10-23 thomas client_cnt++;
225 3efd8e31 2022-10-23 thomas static struct gotd_client *
226 3efd8e31 2022-10-23 thomas find_client(uint32_t client_id)
228 3efd8e31 2022-10-23 thomas uint64_t slot;
229 3efd8e31 2022-10-23 thomas struct gotd_client *c;
231 3efd8e31 2022-10-23 thomas slot = client_hash(client_id) % nitems(gotd_clients);
232 3efd8e31 2022-10-23 thomas STAILQ_FOREACH(c, &gotd_clients[slot], entry) {
233 3efd8e31 2022-10-23 thomas if (c->id == client_id)
234 3efd8e31 2022-10-23 thomas return c;
237 3efd8e31 2022-10-23 thomas return NULL;
240 3efd8e31 2022-10-23 thomas static uint32_t
241 3efd8e31 2022-10-23 thomas get_client_id(void)
243 3efd8e31 2022-10-23 thomas int duplicate = 0;
244 3efd8e31 2022-10-23 thomas uint32_t id;
247 3efd8e31 2022-10-23 thomas id = arc4random();
248 3efd8e31 2022-10-23 thomas duplicate = (find_client(id) != NULL);
249 3efd8e31 2022-10-23 thomas } while (duplicate || id == 0);
251 3efd8e31 2022-10-23 thomas return id;
254 3efd8e31 2022-10-23 thomas static struct gotd_child_proc *
255 3efd8e31 2022-10-23 thomas get_client_proc(struct gotd_client *client)
257 3efd8e31 2022-10-23 thomas if (client->repo_read && client->repo_write) {
258 3efd8e31 2022-10-23 thomas fatalx("uid %d is reading and writing in the same session",
259 3efd8e31 2022-10-23 thomas client->euid);
260 3efd8e31 2022-10-23 thomas /* NOTREACHED */
263 3efd8e31 2022-10-23 thomas if (client->repo_read)
264 3efd8e31 2022-10-23 thomas return client->repo_read;
265 3efd8e31 2022-10-23 thomas else if (client->repo_write)
266 3efd8e31 2022-10-23 thomas return client->repo_write;
268 3efd8e31 2022-10-23 thomas fatal("uid %d is neither reading nor writing", client->euid);
269 3efd8e31 2022-10-23 thomas /* NOTREACHED */
271 3efd8e31 2022-10-23 thomas return NULL;
274 3efd8e31 2022-10-23 thomas static int
275 3efd8e31 2022-10-23 thomas client_is_reading(struct gotd_client *client)
277 3efd8e31 2022-10-23 thomas return client->repo_read != NULL;
280 3efd8e31 2022-10-23 thomas static int
281 3efd8e31 2022-10-23 thomas client_is_writing(struct gotd_client *client)
283 3efd8e31 2022-10-23 thomas return client->repo_write != NULL;
286 3efd8e31 2022-10-23 thomas static const struct got_error *
287 3efd8e31 2022-10-23 thomas ensure_client_is_reading(struct gotd_client *client)
289 3efd8e31 2022-10-23 thomas if (!client_is_reading(client)) {
290 3efd8e31 2022-10-23 thomas return got_error_fmt(GOT_ERR_BAD_PACKET,
291 3efd8e31 2022-10-23 thomas "uid %d made a read-request but is not reading from "
292 3efd8e31 2022-10-23 thomas "a repository", client->euid);
295 3efd8e31 2022-10-23 thomas return NULL;
298 3efd8e31 2022-10-23 thomas static const struct got_error *
299 3efd8e31 2022-10-23 thomas ensure_client_is_writing(struct gotd_client *client)
301 3efd8e31 2022-10-23 thomas if (!client_is_writing(client)) {
302 3efd8e31 2022-10-23 thomas return got_error_fmt(GOT_ERR_BAD_PACKET,
303 3efd8e31 2022-10-23 thomas "uid %d made a write-request but is not writing to "
304 3efd8e31 2022-10-23 thomas "a repository", client->euid);
307 3efd8e31 2022-10-23 thomas return NULL;
310 3efd8e31 2022-10-23 thomas static const struct got_error *
311 3efd8e31 2022-10-23 thomas ensure_client_is_not_writing(struct gotd_client *client)
313 3efd8e31 2022-10-23 thomas if (client_is_writing(client)) {
314 3efd8e31 2022-10-23 thomas return got_error_fmt(GOT_ERR_BAD_PACKET,
315 3efd8e31 2022-10-23 thomas "uid %d made a read-request but is writing to "
316 3efd8e31 2022-10-23 thomas "a repository", client->euid);
319 3efd8e31 2022-10-23 thomas return NULL;
322 3efd8e31 2022-10-23 thomas static const struct got_error *
323 3efd8e31 2022-10-23 thomas ensure_client_is_not_reading(struct gotd_client *client)
325 3efd8e31 2022-10-23 thomas if (client_is_reading(client)) {
326 3efd8e31 2022-10-23 thomas return got_error_fmt(GOT_ERR_BAD_PACKET,
327 3efd8e31 2022-10-23 thomas "uid %d made a write-request but is reading from "
328 3efd8e31 2022-10-23 thomas "a repository", client->euid);
331 3efd8e31 2022-10-23 thomas return NULL;
334 3efd8e31 2022-10-23 thomas static void
335 3efd8e31 2022-10-23 thomas disconnect(struct gotd_client *client)
337 3efd8e31 2022-10-23 thomas struct gotd_imsg_disconnect idisconnect;
338 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc = get_client_proc(client);
339 3efd8e31 2022-10-23 thomas uint64_t slot;
341 3efd8e31 2022-10-23 thomas log_debug("uid %d: disconnecting", client->euid);
343 3efd8e31 2022-10-23 thomas idisconnect.client_id = client->id;
344 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&proc->iev,
345 3efd8e31 2022-10-23 thomas GOTD_IMSG_DISCONNECT, PROC_GOTD, -1,
346 3efd8e31 2022-10-23 thomas &idisconnect, sizeof(idisconnect)) == -1)
347 3efd8e31 2022-10-23 thomas log_warn("imsg compose DISCONNECT");
349 3efd8e31 2022-10-23 thomas slot = client_hash(client->id) % nitems(gotd_clients);
350 3efd8e31 2022-10-23 thomas STAILQ_REMOVE(&gotd_clients[slot], client, gotd_client, entry);
351 3efd8e31 2022-10-23 thomas imsg_clear(&client->iev.ibuf);
352 3efd8e31 2022-10-23 thomas event_del(&client->iev.ev);
353 3efd8e31 2022-10-23 thomas evtimer_del(&client->tmo);
354 3efd8e31 2022-10-23 thomas close(client->fd);
355 3efd8e31 2022-10-23 thomas if (client->delta_cache_fd != -1)
356 3efd8e31 2022-10-23 thomas close(client->delta_cache_fd);
357 3efd8e31 2022-10-23 thomas if (client->packfile_path) {
358 3efd8e31 2022-10-23 thomas if (unlink(client->packfile_path) == -1 && errno != ENOENT)
359 3efd8e31 2022-10-23 thomas log_warn("unlink %s: ", client->packfile_path);
360 3efd8e31 2022-10-23 thomas free(client->packfile_path);
362 3efd8e31 2022-10-23 thomas if (client->packidx_path) {
363 3efd8e31 2022-10-23 thomas if (unlink(client->packidx_path) == -1 && errno != ENOENT)
364 3efd8e31 2022-10-23 thomas log_warn("unlink %s: ", client->packidx_path);
365 3efd8e31 2022-10-23 thomas free(client->packidx_path);
367 3efd8e31 2022-10-23 thomas free(client->capabilities);
368 3efd8e31 2022-10-23 thomas free(client);
369 3efd8e31 2022-10-23 thomas inflight--;
370 3efd8e31 2022-10-23 thomas client_cnt--;
373 3efd8e31 2022-10-23 thomas static void
374 3efd8e31 2022-10-23 thomas disconnect_on_error(struct gotd_client *client, const struct got_error *err)
376 3efd8e31 2022-10-23 thomas struct imsgbuf ibuf;
378 3efd8e31 2022-10-23 thomas log_warnx("uid %d: %s", client->euid, err->msg);
379 3efd8e31 2022-10-23 thomas if (err->code != GOT_ERR_EOF) {
380 3efd8e31 2022-10-23 thomas imsg_init(&ibuf, client->fd);
381 3efd8e31 2022-10-23 thomas gotd_imsg_send_error(&ibuf, 0, PROC_GOTD, err);
382 3efd8e31 2022-10-23 thomas imsg_clear(&ibuf);
384 3efd8e31 2022-10-23 thomas disconnect(client);
387 3efd8e31 2022-10-23 thomas static struct gotd_child_proc *
388 3efd8e31 2022-10-23 thomas find_proc_by_repo_name(enum gotd_procid proc_id, const char *repo_name)
390 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc;
392 3efd8e31 2022-10-23 thomas size_t namelen;
394 3efd8e31 2022-10-23 thomas for (i = 0; i < gotd.nprocs; i++) {
395 3efd8e31 2022-10-23 thomas proc = &gotd.procs[i];
396 3efd8e31 2022-10-23 thomas if (proc->type != proc_id)
397 3efd8e31 2022-10-23 thomas continue;
398 3efd8e31 2022-10-23 thomas namelen = strlen(proc->repo_name);
399 3efd8e31 2022-10-23 thomas if (strncmp(proc->repo_name, repo_name, namelen) != 0)
400 3efd8e31 2022-10-23 thomas continue;
401 3efd8e31 2022-10-23 thomas if (repo_name[namelen] == '\0' ||
402 3efd8e31 2022-10-23 thomas strcmp(&repo_name[namelen], ".git") == 0)
403 3efd8e31 2022-10-23 thomas return proc;
406 3efd8e31 2022-10-23 thomas return NULL;
409 3efd8e31 2022-10-23 thomas static struct gotd_child_proc *
410 3efd8e31 2022-10-23 thomas find_proc_by_fd(int fd)
412 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc;
415 3efd8e31 2022-10-23 thomas for (i = 0; i < gotd.nprocs; i++) {
416 3efd8e31 2022-10-23 thomas proc = &gotd.procs[i];
417 3efd8e31 2022-10-23 thomas if (proc->iev.ibuf.fd == fd)
418 3efd8e31 2022-10-23 thomas return proc;
421 3efd8e31 2022-10-23 thomas return NULL;
424 3efd8e31 2022-10-23 thomas static const struct got_error *
425 3efd8e31 2022-10-23 thomas forward_list_refs_request(struct gotd_client *client, struct imsg *imsg)
427 3efd8e31 2022-10-23 thomas const struct got_error *err;
428 3efd8e31 2022-10-23 thomas struct gotd_imsg_list_refs ireq;
429 3efd8e31 2022-10-23 thomas struct gotd_imsg_list_refs_internal ilref;
430 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc = NULL;
431 3efd8e31 2022-10-23 thomas size_t datalen;
432 3efd8e31 2022-10-23 thomas int fd = -1;
434 3efd8e31 2022-10-23 thomas log_debug("list-refs request from uid %d", client->euid);
436 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
437 3efd8e31 2022-10-23 thomas if (datalen != sizeof(ireq))
438 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
440 3efd8e31 2022-10-23 thomas memcpy(&ireq, imsg->data, datalen);
442 3efd8e31 2022-10-23 thomas memset(&ilref, 0, sizeof(ilref));
443 3efd8e31 2022-10-23 thomas ilref.client_id = client->id;
445 3efd8e31 2022-10-23 thomas if (ireq.client_is_reading) {
446 3efd8e31 2022-10-23 thomas err = ensure_client_is_not_writing(client);
448 3efd8e31 2022-10-23 thomas return err;
449 3efd8e31 2022-10-23 thomas client->repo_read = find_proc_by_repo_name(PROC_REPO_READ,
450 3efd8e31 2022-10-23 thomas ireq.repo_name);
451 3efd8e31 2022-10-23 thomas if (client->repo_read == NULL)
452 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_NOT_GIT_REPO);
454 3efd8e31 2022-10-23 thomas err = ensure_client_is_not_reading(client);
456 3efd8e31 2022-10-23 thomas return err;
457 3efd8e31 2022-10-23 thomas client->repo_write = find_proc_by_repo_name(PROC_REPO_WRITE,
458 3efd8e31 2022-10-23 thomas ireq.repo_name);
459 3efd8e31 2022-10-23 thomas if (client->repo_write == NULL)
460 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_NOT_GIT_REPO);
463 3efd8e31 2022-10-23 thomas fd = dup(client->fd);
464 3efd8e31 2022-10-23 thomas if (fd == -1)
465 3efd8e31 2022-10-23 thomas return got_error_from_errno("dup");
467 3efd8e31 2022-10-23 thomas proc = get_client_proc(client);
468 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&proc->iev,
469 3efd8e31 2022-10-23 thomas GOTD_IMSG_LIST_REFS_INTERNAL, PROC_GOTD, fd,
470 3efd8e31 2022-10-23 thomas &ilref, sizeof(ilref)) == -1) {
471 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg compose WANT");
472 3efd8e31 2022-10-23 thomas close(fd);
473 3efd8e31 2022-10-23 thomas return err;
476 3efd8e31 2022-10-23 thomas return NULL;
479 3efd8e31 2022-10-23 thomas static const struct got_error *
480 3efd8e31 2022-10-23 thomas forward_want(struct gotd_client *client, struct imsg *imsg)
482 3efd8e31 2022-10-23 thomas struct gotd_imsg_want ireq;
483 3efd8e31 2022-10-23 thomas struct gotd_imsg_want iwant;
484 3efd8e31 2022-10-23 thomas size_t datalen;
486 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
487 3efd8e31 2022-10-23 thomas if (datalen != sizeof(ireq))
488 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
490 3efd8e31 2022-10-23 thomas memcpy(&ireq, imsg->data, datalen);
492 3efd8e31 2022-10-23 thomas memset(&iwant, 0, sizeof(iwant));
493 3efd8e31 2022-10-23 thomas memcpy(iwant.object_id, ireq.object_id, SHA1_DIGEST_LENGTH);
494 3efd8e31 2022-10-23 thomas iwant.client_id = client->id;
496 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_read->iev, GOTD_IMSG_WANT,
497 3efd8e31 2022-10-23 thomas PROC_GOTD, -1, &iwant, sizeof(iwant)) == -1)
498 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg compose WANT");
500 3efd8e31 2022-10-23 thomas return NULL;
503 3efd8e31 2022-10-23 thomas static const struct got_error *
504 3efd8e31 2022-10-23 thomas forward_ref_update(struct gotd_client *client, struct imsg *imsg)
506 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
507 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update ireq;
508 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update *iref = NULL;
509 3efd8e31 2022-10-23 thomas size_t datalen;
511 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
512 3efd8e31 2022-10-23 thomas if (datalen < sizeof(ireq))
513 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
514 3efd8e31 2022-10-23 thomas memcpy(&ireq, imsg->data, sizeof(ireq));
515 3efd8e31 2022-10-23 thomas if (datalen != sizeof(ireq) + ireq.name_len)
516 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
518 3efd8e31 2022-10-23 thomas iref = malloc(datalen);
519 3efd8e31 2022-10-23 thomas if (iref == NULL)
520 3efd8e31 2022-10-23 thomas return got_error_from_errno("malloc");
521 3efd8e31 2022-10-23 thomas memcpy(iref, imsg->data, datalen);
523 3efd8e31 2022-10-23 thomas iref->client_id = client->id;
524 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_write->iev,
525 3efd8e31 2022-10-23 thomas GOTD_IMSG_REF_UPDATE, PROC_GOTD, -1, iref, datalen) == -1)
526 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg compose REF_UPDATE");
527 3efd8e31 2022-10-23 thomas free(iref);
528 3efd8e31 2022-10-23 thomas return err;
531 3efd8e31 2022-10-23 thomas static const struct got_error *
532 3efd8e31 2022-10-23 thomas forward_have(struct gotd_client *client, struct imsg *imsg)
534 3efd8e31 2022-10-23 thomas struct gotd_imsg_have ireq;
535 3efd8e31 2022-10-23 thomas struct gotd_imsg_have ihave;
536 3efd8e31 2022-10-23 thomas size_t datalen;
538 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
539 3efd8e31 2022-10-23 thomas if (datalen != sizeof(ireq))
540 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
542 3efd8e31 2022-10-23 thomas memcpy(&ireq, imsg->data, datalen);
544 3efd8e31 2022-10-23 thomas memset(&ihave, 0, sizeof(ihave));
545 3efd8e31 2022-10-23 thomas memcpy(ihave.object_id, ireq.object_id, SHA1_DIGEST_LENGTH);
546 3efd8e31 2022-10-23 thomas ihave.client_id = client->id;
548 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_read->iev, GOTD_IMSG_HAVE,
549 3efd8e31 2022-10-23 thomas PROC_GOTD, -1, &ihave, sizeof(ihave)) == -1)
550 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg compose HAVE");
552 3efd8e31 2022-10-23 thomas return NULL;
555 3efd8e31 2022-10-23 thomas static int
556 3efd8e31 2022-10-23 thomas client_has_capability(struct gotd_client *client, const char *capastr)
558 3efd8e31 2022-10-23 thomas struct gotd_client_capability *capa;
559 3efd8e31 2022-10-23 thomas size_t i;
561 3efd8e31 2022-10-23 thomas if (client->ncapabilities == 0)
562 3efd8e31 2022-10-23 thomas return 0;
564 3efd8e31 2022-10-23 thomas for (i = 0; i < client->ncapabilities; i++) {
565 3efd8e31 2022-10-23 thomas capa = &client->capabilities[i];
566 3efd8e31 2022-10-23 thomas if (strcmp(capa->key, capastr) == 0)
567 3efd8e31 2022-10-23 thomas return 1;
570 3efd8e31 2022-10-23 thomas return 0;
573 3efd8e31 2022-10-23 thomas static const struct got_error *
574 3efd8e31 2022-10-23 thomas recv_capabilities(struct gotd_client *client, struct imsg *imsg)
576 3efd8e31 2022-10-23 thomas struct gotd_imsg_capabilities icapas;
577 3efd8e31 2022-10-23 thomas size_t datalen;
579 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
580 3efd8e31 2022-10-23 thomas if (datalen != sizeof(icapas))
581 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
582 3efd8e31 2022-10-23 thomas memcpy(&icapas, imsg->data, sizeof(icapas));
584 3efd8e31 2022-10-23 thomas client->ncapa_alloc = icapas.ncapabilities;
585 3efd8e31 2022-10-23 thomas client->capabilities = calloc(client->ncapa_alloc,
586 3efd8e31 2022-10-23 thomas sizeof(*client->capabilities));
587 3efd8e31 2022-10-23 thomas if (client->capabilities == NULL) {
588 3efd8e31 2022-10-23 thomas client->ncapa_alloc = 0;
589 3efd8e31 2022-10-23 thomas return got_error_from_errno("calloc");
592 3efd8e31 2022-10-23 thomas log_debug("expecting %zu capabilities from uid %d",
593 3efd8e31 2022-10-23 thomas client->ncapa_alloc, client->euid);
594 3efd8e31 2022-10-23 thomas return NULL;
597 3efd8e31 2022-10-23 thomas static const struct got_error *
598 3efd8e31 2022-10-23 thomas recv_capability(struct gotd_client *client, struct imsg *imsg)
600 3efd8e31 2022-10-23 thomas struct gotd_imsg_capability icapa;
601 3efd8e31 2022-10-23 thomas struct gotd_client_capability *capa;
602 3efd8e31 2022-10-23 thomas size_t datalen;
603 3efd8e31 2022-10-23 thomas char *key, *value = NULL;
605 3efd8e31 2022-10-23 thomas if (client->capabilities == NULL ||
606 3efd8e31 2022-10-23 thomas client->ncapabilities >= client->ncapa_alloc) {
607 3efd8e31 2022-10-23 thomas return got_error_msg(GOT_ERR_BAD_REQUEST,
608 3efd8e31 2022-10-23 thomas "unexpected capability received");
611 3efd8e31 2022-10-23 thomas memset(&icapa, 0, sizeof(icapa));
613 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
614 3efd8e31 2022-10-23 thomas if (datalen < sizeof(icapa))
615 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
616 3efd8e31 2022-10-23 thomas memcpy(&icapa, imsg->data, sizeof(icapa));
618 3efd8e31 2022-10-23 thomas if (datalen != sizeof(icapa) + icapa.key_len + icapa.value_len)
619 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
621 3efd8e31 2022-10-23 thomas key = malloc(icapa.key_len + 1);
622 3efd8e31 2022-10-23 thomas if (key == NULL)
623 3efd8e31 2022-10-23 thomas return got_error_from_errno("malloc");
624 3efd8e31 2022-10-23 thomas if (icapa.value_len > 0) {
625 3efd8e31 2022-10-23 thomas value = malloc(icapa.value_len + 1);
626 3efd8e31 2022-10-23 thomas if (value == NULL) {
627 3efd8e31 2022-10-23 thomas free(key);
628 3efd8e31 2022-10-23 thomas return got_error_from_errno("malloc");
632 3efd8e31 2022-10-23 thomas memcpy(key, imsg->data + sizeof(icapa), icapa.key_len);
633 3efd8e31 2022-10-23 thomas key[icapa.key_len] = '\0';
634 3efd8e31 2022-10-23 thomas if (value) {
635 3efd8e31 2022-10-23 thomas memcpy(value, imsg->data + sizeof(icapa) + icapa.key_len,
636 3efd8e31 2022-10-23 thomas icapa.value_len);
637 3efd8e31 2022-10-23 thomas value[icapa.value_len] = '\0';
640 3efd8e31 2022-10-23 thomas capa = &client->capabilities[client->ncapabilities++];
641 3efd8e31 2022-10-23 thomas capa->key = key;
642 3efd8e31 2022-10-23 thomas capa->value = value;
644 3efd8e31 2022-10-23 thomas if (value)
645 3efd8e31 2022-10-23 thomas log_debug("uid %d: capability %s=%s", client->euid, key, value);
647 3efd8e31 2022-10-23 thomas log_debug("uid %d: capability %s", client->euid, key);
649 3efd8e31 2022-10-23 thomas return NULL;
652 3efd8e31 2022-10-23 thomas static const struct got_error *
653 3efd8e31 2022-10-23 thomas send_packfile(struct gotd_client *client)
655 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
656 3efd8e31 2022-10-23 thomas struct gotd_imsg_send_packfile ipack;
657 3efd8e31 2022-10-23 thomas struct gotd_imsg_packfile_pipe ipipe;
658 3efd8e31 2022-10-23 thomas int pipe[2];
660 3efd8e31 2022-10-23 thomas if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe) == -1)
661 3efd8e31 2022-10-23 thomas return got_error_from_errno("socketpair");
663 3efd8e31 2022-10-23 thomas memset(&ipack, 0, sizeof(ipack));
664 3efd8e31 2022-10-23 thomas memset(&ipipe, 0, sizeof(ipipe));
666 3efd8e31 2022-10-23 thomas ipack.client_id = client->id;
667 3efd8e31 2022-10-23 thomas if (client_has_capability(client, GOT_CAPA_SIDE_BAND_64K))
668 3efd8e31 2022-10-23 thomas ipack.report_progress = 1;
670 3efd8e31 2022-10-23 thomas client->delta_cache_fd = got_opentempfd();
671 3efd8e31 2022-10-23 thomas if (client->delta_cache_fd == -1)
672 3efd8e31 2022-10-23 thomas return got_error_from_errno("got_opentempfd");
674 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_read->iev,
675 3efd8e31 2022-10-23 thomas GOTD_IMSG_SEND_PACKFILE, PROC_GOTD, client->delta_cache_fd,
676 3efd8e31 2022-10-23 thomas &ipack, sizeof(ipack)) == -1) {
677 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg compose SEND_PACKFILE");
678 3efd8e31 2022-10-23 thomas close(pipe[0]);
679 3efd8e31 2022-10-23 thomas close(pipe[1]);
680 3efd8e31 2022-10-23 thomas return err;
683 3efd8e31 2022-10-23 thomas ipipe.client_id = client->id;
685 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_read->iev,
686 3efd8e31 2022-10-23 thomas GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD, pipe[0],
687 3efd8e31 2022-10-23 thomas &ipipe, sizeof(ipipe)) == -1) {
688 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg compose PACKFILE_PIPE");
689 3efd8e31 2022-10-23 thomas close(pipe[1]);
690 3efd8e31 2022-10-23 thomas return err;
693 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_read->iev,
694 3efd8e31 2022-10-23 thomas GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD, pipe[1],
695 3efd8e31 2022-10-23 thomas &ipipe, sizeof(ipipe)) == -1)
696 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg compose PACKFILE_PIPE");
698 3efd8e31 2022-10-23 thomas return err;
701 3efd8e31 2022-10-23 thomas static const struct got_error *
702 3efd8e31 2022-10-23 thomas recv_packfile(struct gotd_client *client)
704 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
705 3efd8e31 2022-10-23 thomas struct gotd_imsg_recv_packfile ipack;
706 3efd8e31 2022-10-23 thomas struct gotd_imsg_packfile_pipe ipipe;
707 3efd8e31 2022-10-23 thomas struct gotd_imsg_packidx_file ifile;
708 3efd8e31 2022-10-23 thomas char *basepath = NULL, *pack_path = NULL, *idx_path = NULL;
709 3efd8e31 2022-10-23 thomas int packfd = -1, idxfd = -1;
710 3efd8e31 2022-10-23 thomas int pipe[2] = { -1, -1 };
712 3efd8e31 2022-10-23 thomas if (client->packfile_path) {
713 3efd8e31 2022-10-23 thomas return got_error_fmt(GOT_ERR_PRIVSEP_MSG,
714 3efd8e31 2022-10-23 thomas "uid %d already has a pack file", client->euid);
717 3efd8e31 2022-10-23 thomas if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe) == -1)
718 3efd8e31 2022-10-23 thomas return got_error_from_errno("socketpair");
720 3efd8e31 2022-10-23 thomas memset(&ipipe, 0, sizeof(ipipe));
721 3efd8e31 2022-10-23 thomas ipipe.client_id = client->id;
723 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_write->iev,
724 3efd8e31 2022-10-23 thomas GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD, pipe[0],
725 3efd8e31 2022-10-23 thomas &ipipe, sizeof(ipipe)) == -1) {
726 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg compose PACKFILE_PIPE");
727 3efd8e31 2022-10-23 thomas pipe[0] = -1;
728 3efd8e31 2022-10-23 thomas goto done;
730 3efd8e31 2022-10-23 thomas pipe[0] = -1;
732 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_write->iev,
733 3efd8e31 2022-10-23 thomas GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD, pipe[1],
734 3efd8e31 2022-10-23 thomas &ipipe, sizeof(ipipe)) == -1)
735 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg compose PACKFILE_PIPE");
736 3efd8e31 2022-10-23 thomas pipe[1] = -1;
738 3efd8e31 2022-10-23 thomas if (asprintf(&basepath, "%s/%s/receiving-from-uid-%d.pack",
739 3efd8e31 2022-10-23 thomas client->repo_write->chroot_path, GOT_OBJECTS_PACK_DIR,
740 3efd8e31 2022-10-23 thomas client->euid) == -1) {
741 3efd8e31 2022-10-23 thomas err = got_error_from_errno("asprintf");
742 3efd8e31 2022-10-23 thomas goto done;
745 3efd8e31 2022-10-23 thomas err = got_opentemp_named_fd(&pack_path, &packfd, basepath);
747 3efd8e31 2022-10-23 thomas goto done;
749 3efd8e31 2022-10-23 thomas free(basepath);
750 3efd8e31 2022-10-23 thomas if (asprintf(&basepath, "%s/%s/receiving-from-uid-%d.idx",
751 3efd8e31 2022-10-23 thomas client->repo_write->chroot_path, GOT_OBJECTS_PACK_DIR,
752 3efd8e31 2022-10-23 thomas client->euid) == -1) {
753 3efd8e31 2022-10-23 thomas err = got_error_from_errno("asprintf");
754 3efd8e31 2022-10-23 thomas basepath = NULL;
755 3efd8e31 2022-10-23 thomas goto done;
757 3efd8e31 2022-10-23 thomas err = got_opentemp_named_fd(&idx_path, &idxfd, basepath);
759 3efd8e31 2022-10-23 thomas goto done;
761 3efd8e31 2022-10-23 thomas memset(&ifile, 0, sizeof(ifile));
762 3efd8e31 2022-10-23 thomas ifile.client_id = client->id;
763 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_write->iev,
764 3efd8e31 2022-10-23 thomas GOTD_IMSG_PACKIDX_FILE, PROC_GOTD, idxfd,
765 3efd8e31 2022-10-23 thomas &ifile, sizeof(ifile)) == -1) {
766 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg compose PACKIDX_FILE");
767 3efd8e31 2022-10-23 thomas idxfd = -1;
768 3efd8e31 2022-10-23 thomas goto done;
770 3efd8e31 2022-10-23 thomas idxfd = -1;
772 3efd8e31 2022-10-23 thomas memset(&ipack, 0, sizeof(ipack));
773 3efd8e31 2022-10-23 thomas ipack.client_id = client->id;
774 3efd8e31 2022-10-23 thomas if (client_has_capability(client, GOT_CAPA_REPORT_STATUS))
775 3efd8e31 2022-10-23 thomas ipack.report_status = 1;
777 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->repo_write->iev,
778 3efd8e31 2022-10-23 thomas GOTD_IMSG_RECV_PACKFILE, PROC_GOTD, packfd,
779 3efd8e31 2022-10-23 thomas &ipack, sizeof(ipack)) == -1) {
780 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg compose RECV_PACKFILE");
781 3efd8e31 2022-10-23 thomas packfd = -1;
782 3efd8e31 2022-10-23 thomas goto done;
784 3efd8e31 2022-10-23 thomas packfd = -1;
787 3efd8e31 2022-10-23 thomas free(basepath);
788 3efd8e31 2022-10-23 thomas if (pipe[0] != -1 && close(pipe[0]) == -1 && err == NULL)
789 3efd8e31 2022-10-23 thomas err = got_error_from_errno("close");
790 3efd8e31 2022-10-23 thomas if (pipe[1] != -1 && close(pipe[1]) == -1 && err == NULL)
791 3efd8e31 2022-10-23 thomas err = got_error_from_errno("close");
792 3efd8e31 2022-10-23 thomas if (packfd != -1 && close(packfd) == -1 && err == NULL)
793 3efd8e31 2022-10-23 thomas err = got_error_from_errno("close");
794 3efd8e31 2022-10-23 thomas if (idxfd != -1 && close(idxfd) == -1 && err == NULL)
795 3efd8e31 2022-10-23 thomas err = got_error_from_errno("close");
796 3efd8e31 2022-10-23 thomas if (err) {
797 3efd8e31 2022-10-23 thomas free(pack_path);
798 3efd8e31 2022-10-23 thomas free(idx_path);
800 3efd8e31 2022-10-23 thomas client->packfile_path = pack_path;
801 3efd8e31 2022-10-23 thomas client->packidx_path = idx_path;
803 3efd8e31 2022-10-23 thomas return err;
806 3efd8e31 2022-10-23 thomas static void
807 3efd8e31 2022-10-23 thomas gotd_request(int fd, short events, void *arg)
809 3efd8e31 2022-10-23 thomas struct gotd_imsgev *iev = arg;
810 3efd8e31 2022-10-23 thomas struct imsgbuf *ibuf = &iev->ibuf;
811 3efd8e31 2022-10-23 thomas struct gotd_client *client = iev->handler_arg;
812 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
813 3efd8e31 2022-10-23 thomas struct imsg imsg;
814 3efd8e31 2022-10-23 thomas ssize_t n;
816 3efd8e31 2022-10-23 thomas if (events & EV_WRITE) {
817 3efd8e31 2022-10-23 thomas while (ibuf->w.queued) {
818 3efd8e31 2022-10-23 thomas n = msgbuf_write(&ibuf->w);
819 3efd8e31 2022-10-23 thomas if (n == -1 && errno == EPIPE) {
821 3efd8e31 2022-10-23 thomas * The client has closed its socket.
822 3efd8e31 2022-10-23 thomas * This can happen when Git clients are
823 3efd8e31 2022-10-23 thomas * done sending pack file data.
825 3efd8e31 2022-10-23 thomas msgbuf_clear(&ibuf->w);
826 3efd8e31 2022-10-23 thomas continue;
827 3efd8e31 2022-10-23 thomas } else if (n == -1 && errno != EAGAIN) {
828 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg_flush");
829 3efd8e31 2022-10-23 thomas disconnect_on_error(client, err);
832 3efd8e31 2022-10-23 thomas if (n == 0) {
833 3efd8e31 2022-10-23 thomas /* Connection closed. */
834 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_EOF);
835 3efd8e31 2022-10-23 thomas disconnect_on_error(client, err);
841 3efd8e31 2022-10-23 thomas if ((events & EV_READ) == 0)
844 3efd8e31 2022-10-23 thomas memset(&imsg, 0, sizeof(imsg));
846 3efd8e31 2022-10-23 thomas while (err == NULL) {
847 3efd8e31 2022-10-23 thomas err = gotd_imsg_recv(&imsg, ibuf, 0);
848 3efd8e31 2022-10-23 thomas if (err) {
849 3efd8e31 2022-10-23 thomas if (err->code == GOT_ERR_PRIVSEP_READ)
850 3efd8e31 2022-10-23 thomas err = NULL;
854 3efd8e31 2022-10-23 thomas evtimer_del(&client->tmo);
856 3efd8e31 2022-10-23 thomas switch (imsg.hdr.type) {
857 3efd8e31 2022-10-23 thomas case GOTD_IMSG_LIST_REFS:
858 3efd8e31 2022-10-23 thomas if (client->state != GOTD_STATE_EXPECT_LIST_REFS) {
859 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
860 3efd8e31 2022-10-23 thomas "unexpected list-refs request received");
863 3efd8e31 2022-10-23 thomas err = forward_list_refs_request(client, &imsg);
866 3efd8e31 2022-10-23 thomas client->state = GOTD_STATE_EXPECT_CAPABILITIES;
867 3efd8e31 2022-10-23 thomas log_debug("uid %d: expecting capabilities",
868 3efd8e31 2022-10-23 thomas client->euid);
870 3efd8e31 2022-10-23 thomas case GOTD_IMSG_CAPABILITIES:
871 3efd8e31 2022-10-23 thomas if (client->state != GOTD_STATE_EXPECT_CAPABILITIES) {
872 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
873 3efd8e31 2022-10-23 thomas "unexpected capabilities received");
876 3efd8e31 2022-10-23 thomas log_debug("receiving capabilities from uid %d",
877 3efd8e31 2022-10-23 thomas client->euid);
878 3efd8e31 2022-10-23 thomas err = recv_capabilities(client, &imsg);
880 3efd8e31 2022-10-23 thomas case GOTD_IMSG_CAPABILITY:
881 3efd8e31 2022-10-23 thomas if (client->state != GOTD_STATE_EXPECT_CAPABILITIES) {
882 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
883 3efd8e31 2022-10-23 thomas "unexpected capability received");
886 3efd8e31 2022-10-23 thomas err = recv_capability(client, &imsg);
887 3efd8e31 2022-10-23 thomas if (err || client->ncapabilities < client->ncapa_alloc)
889 3efd8e31 2022-10-23 thomas if (client_is_reading(client)) {
890 3efd8e31 2022-10-23 thomas client->state = GOTD_STATE_EXPECT_WANT;
891 3efd8e31 2022-10-23 thomas log_debug("uid %d: expecting want-lines",
892 3efd8e31 2022-10-23 thomas client->euid);
893 3efd8e31 2022-10-23 thomas } else if (client_is_writing(client)) {
894 3efd8e31 2022-10-23 thomas client->state = GOTD_STATE_EXPECT_REF_UPDATE;
895 3efd8e31 2022-10-23 thomas log_debug("uid %d: expecting ref-update-lines",
896 3efd8e31 2022-10-23 thomas client->euid);
898 3efd8e31 2022-10-23 thomas fatalx("client %d is both reading and writing",
899 3efd8e31 2022-10-23 thomas client->euid);
901 3efd8e31 2022-10-23 thomas case GOTD_IMSG_WANT:
902 3efd8e31 2022-10-23 thomas if (client->state != GOTD_STATE_EXPECT_WANT) {
903 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
904 3efd8e31 2022-10-23 thomas "unexpected want-line received");
907 3efd8e31 2022-10-23 thomas log_debug("received want-line from uid %d",
908 3efd8e31 2022-10-23 thomas client->euid);
909 3efd8e31 2022-10-23 thomas err = ensure_client_is_reading(client);
912 3efd8e31 2022-10-23 thomas err = forward_want(client, &imsg);
914 3efd8e31 2022-10-23 thomas case GOTD_IMSG_REF_UPDATE:
915 3efd8e31 2022-10-23 thomas if (client->state != GOTD_STATE_EXPECT_REF_UPDATE) {
916 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
917 3efd8e31 2022-10-23 thomas "unexpected ref-update-line received");
920 3efd8e31 2022-10-23 thomas log_debug("received ref-update-line from uid %d",
921 3efd8e31 2022-10-23 thomas client->euid);
922 3efd8e31 2022-10-23 thomas err = ensure_client_is_writing(client);
925 3efd8e31 2022-10-23 thomas err = forward_ref_update(client, &imsg);
928 3efd8e31 2022-10-23 thomas client->state = GOTD_STATE_EXPECT_MORE_REF_UPDATES;
930 3efd8e31 2022-10-23 thomas case GOTD_IMSG_HAVE:
931 3efd8e31 2022-10-23 thomas if (client->state != GOTD_STATE_EXPECT_HAVE) {
932 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
933 3efd8e31 2022-10-23 thomas "unexpected have-line received");
936 3efd8e31 2022-10-23 thomas log_debug("received have-line from uid %d",
937 3efd8e31 2022-10-23 thomas client->euid);
938 3efd8e31 2022-10-23 thomas err = ensure_client_is_reading(client);
941 3efd8e31 2022-10-23 thomas err = forward_have(client, &imsg);
945 3efd8e31 2022-10-23 thomas case GOTD_IMSG_FLUSH:
946 3efd8e31 2022-10-23 thomas if (client->state == GOTD_STATE_EXPECT_WANT ||
947 3efd8e31 2022-10-23 thomas client->state == GOTD_STATE_EXPECT_HAVE) {
948 3efd8e31 2022-10-23 thomas err = ensure_client_is_reading(client);
951 3efd8e31 2022-10-23 thomas } else if (client->state ==
952 3efd8e31 2022-10-23 thomas GOTD_STATE_EXPECT_MORE_REF_UPDATES) {
953 3efd8e31 2022-10-23 thomas err = ensure_client_is_writing(client);
957 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
958 3efd8e31 2022-10-23 thomas "unexpected flush-pkt received");
961 3efd8e31 2022-10-23 thomas log_debug("received flush-pkt from uid %d",
962 3efd8e31 2022-10-23 thomas client->euid);
963 3efd8e31 2022-10-23 thomas if (client->state == GOTD_STATE_EXPECT_WANT) {
964 3efd8e31 2022-10-23 thomas client->state = GOTD_STATE_EXPECT_HAVE;
965 3efd8e31 2022-10-23 thomas log_debug("uid %d: expecting have-lines",
966 3efd8e31 2022-10-23 thomas client->euid);
967 3efd8e31 2022-10-23 thomas } else if (client->state == GOTD_STATE_EXPECT_HAVE) {
968 3efd8e31 2022-10-23 thomas client->state = GOTD_STATE_EXPECT_DONE;
969 3efd8e31 2022-10-23 thomas log_debug("uid %d: expecting 'done'",
970 3efd8e31 2022-10-23 thomas client->euid);
971 3efd8e31 2022-10-23 thomas } else if (client->state ==
972 3efd8e31 2022-10-23 thomas GOTD_STATE_EXPECT_MORE_REF_UPDATES) {
973 3efd8e31 2022-10-23 thomas client->state = GOTD_STATE_EXPECT_PACKFILE;
974 3efd8e31 2022-10-23 thomas log_debug("uid %d: expecting packfile",
975 3efd8e31 2022-10-23 thomas client->euid);
976 3efd8e31 2022-10-23 thomas err = recv_packfile(client);
978 3efd8e31 2022-10-23 thomas /* should not happen, see above */
979 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
980 3efd8e31 2022-10-23 thomas "unexpected client state");
984 3efd8e31 2022-10-23 thomas case GOTD_IMSG_DONE:
985 3efd8e31 2022-10-23 thomas if (client->state != GOTD_STATE_EXPECT_HAVE &&
986 3efd8e31 2022-10-23 thomas client->state != GOTD_STATE_EXPECT_DONE) {
987 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_REQUEST,
988 3efd8e31 2022-10-23 thomas "unexpected flush-pkt received");
991 3efd8e31 2022-10-23 thomas log_debug("received 'done' from uid %d", client->euid);
992 3efd8e31 2022-10-23 thomas err = ensure_client_is_reading(client);
995 3efd8e31 2022-10-23 thomas client->state = GOTD_STATE_DONE;
996 3efd8e31 2022-10-23 thomas err = send_packfile(client);
999 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_MSG);
1003 3efd8e31 2022-10-23 thomas imsg_free(&imsg);
1006 3efd8e31 2022-10-23 thomas if (err) {
1007 3efd8e31 2022-10-23 thomas if (err->code != GOT_ERR_EOF ||
1008 3efd8e31 2022-10-23 thomas client->state != GOTD_STATE_EXPECT_PACKFILE)
1009 3efd8e31 2022-10-23 thomas disconnect_on_error(client, err);
1010 3efd8e31 2022-10-23 thomas } else {
1011 3efd8e31 2022-10-23 thomas gotd_imsg_event_add(&client->iev);
1012 3efd8e31 2022-10-23 thomas evtimer_add(&client->tmo, &timeout);
1016 3efd8e31 2022-10-23 thomas static void
1017 3efd8e31 2022-10-23 thomas gotd_request_timeout(int fd, short events, void *arg)
1019 3efd8e31 2022-10-23 thomas struct gotd_client *client = arg;
1021 3efd8e31 2022-10-23 thomas log_debug("disconnecting uid %d due to timeout", client->euid);
1022 3efd8e31 2022-10-23 thomas disconnect(client);
1025 3efd8e31 2022-10-23 thomas static void
1026 3efd8e31 2022-10-23 thomas gotd_accept(int fd, short event, void *arg)
1028 3efd8e31 2022-10-23 thomas struct sockaddr_storage ss;
1029 3efd8e31 2022-10-23 thomas struct timeval backoff;
1030 3efd8e31 2022-10-23 thomas socklen_t len;
1031 3efd8e31 2022-10-23 thomas int s = -1;
1032 3efd8e31 2022-10-23 thomas struct gotd_client *client = NULL;
1033 3efd8e31 2022-10-23 thomas uid_t euid;
1034 3efd8e31 2022-10-23 thomas gid_t egid;
1036 3efd8e31 2022-10-23 thomas backoff.tv_sec = 1;
1037 3efd8e31 2022-10-23 thomas backoff.tv_usec = 0;
1039 3efd8e31 2022-10-23 thomas if (event_add(&gotd.ev, NULL) == -1) {
1040 3efd8e31 2022-10-23 thomas log_warn("event_add");
1043 3efd8e31 2022-10-23 thomas if (event & EV_TIMEOUT)
1046 3efd8e31 2022-10-23 thomas len = sizeof(ss);
1048 3efd8e31 2022-10-23 thomas s = accept_reserve(fd, (struct sockaddr *)&ss, &len, GOTD_FD_RESERVE,
1049 3efd8e31 2022-10-23 thomas &inflight);
1051 3efd8e31 2022-10-23 thomas if (s == -1) {
1052 3efd8e31 2022-10-23 thomas switch (errno) {
1053 3efd8e31 2022-10-23 thomas case EINTR:
1054 3efd8e31 2022-10-23 thomas case EWOULDBLOCK:
1055 3efd8e31 2022-10-23 thomas case ECONNABORTED:
1057 3efd8e31 2022-10-23 thomas case EMFILE:
1058 3efd8e31 2022-10-23 thomas case ENFILE:
1059 3efd8e31 2022-10-23 thomas event_del(&gotd.ev);
1060 3efd8e31 2022-10-23 thomas evtimer_add(&gotd.pause, &backoff);
1062 3efd8e31 2022-10-23 thomas default:
1063 3efd8e31 2022-10-23 thomas log_warn("%s: accept", __func__);
1068 3efd8e31 2022-10-23 thomas if (client_cnt >= GOTD_MAXCLIENTS)
1069 3efd8e31 2022-10-23 thomas goto err;
1071 3efd8e31 2022-10-23 thomas if (getpeereid(s, &euid, &egid) == -1) {
1072 3efd8e31 2022-10-23 thomas log_warn("%s: getpeereid", __func__);
1073 3efd8e31 2022-10-23 thomas goto err;
1076 3efd8e31 2022-10-23 thomas client = calloc(1, sizeof(*client));
1077 3efd8e31 2022-10-23 thomas if (client == NULL) {
1078 3efd8e31 2022-10-23 thomas log_warn("%s: calloc", __func__);
1079 3efd8e31 2022-10-23 thomas goto err;
1082 3efd8e31 2022-10-23 thomas client->state = GOTD_STATE_EXPECT_LIST_REFS;
1083 3efd8e31 2022-10-23 thomas client->id = get_client_id();
1084 3efd8e31 2022-10-23 thomas client->fd = s;
1086 3efd8e31 2022-10-23 thomas client->delta_cache_fd = -1;
1087 3efd8e31 2022-10-23 thomas client->euid = euid;
1088 3efd8e31 2022-10-23 thomas client->egid = egid;
1089 3efd8e31 2022-10-23 thomas client->nref_updates = -1;
1091 3efd8e31 2022-10-23 thomas imsg_init(&client->iev.ibuf, client->fd);
1092 3efd8e31 2022-10-23 thomas client->iev.handler = gotd_request;
1093 3efd8e31 2022-10-23 thomas client->iev.events = EV_READ;
1094 3efd8e31 2022-10-23 thomas client->iev.handler_arg = client;
1096 3efd8e31 2022-10-23 thomas event_set(&client->iev.ev, client->fd, EV_READ, gotd_request,
1097 3efd8e31 2022-10-23 thomas &client->iev);
1098 3efd8e31 2022-10-23 thomas gotd_imsg_event_add(&client->iev);
1100 3efd8e31 2022-10-23 thomas evtimer_set(&client->tmo, gotd_request_timeout, client);
1102 3efd8e31 2022-10-23 thomas add_client(client);
1103 3efd8e31 2022-10-23 thomas log_debug("%s: new client uid %d connected on fd %d", __func__,
1104 3efd8e31 2022-10-23 thomas client->euid, client->fd);
1107 3efd8e31 2022-10-23 thomas inflight--;
1108 3efd8e31 2022-10-23 thomas if (s != -1)
1109 3efd8e31 2022-10-23 thomas close(s);
1110 3efd8e31 2022-10-23 thomas free(client);
1113 3efd8e31 2022-10-23 thomas static void
1114 3efd8e31 2022-10-23 thomas gotd_accept_paused(int fd, short event, void *arg)
1116 3efd8e31 2022-10-23 thomas event_add(&gotd.ev, NULL);
1119 3efd8e31 2022-10-23 thomas static const char *gotd_proc_names[PROC_MAX] = {
1120 3efd8e31 2022-10-23 thomas "parent",
1121 3efd8e31 2022-10-23 thomas "repo_read",
1122 3efd8e31 2022-10-23 thomas "repo_write"
1125 3efd8e31 2022-10-23 thomas static struct gotd_child_proc *
1126 3efd8e31 2022-10-23 thomas get_proc_for_pid(pid_t pid)
1128 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc;
1131 3efd8e31 2022-10-23 thomas for (i = 0; i < gotd.nprocs; i++) {
1132 3efd8e31 2022-10-23 thomas proc = &gotd.procs[i];
1133 3efd8e31 2022-10-23 thomas if (proc->pid == pid)
1134 3efd8e31 2022-10-23 thomas return proc;
1137 3efd8e31 2022-10-23 thomas return NULL;
1140 3efd8e31 2022-10-23 thomas static void
1141 3efd8e31 2022-10-23 thomas kill_proc(struct gotd_child_proc *proc, int fatal)
1143 3efd8e31 2022-10-23 thomas if (fatal) {
1144 3efd8e31 2022-10-23 thomas log_warnx("sending SIGKILL to PID %d", proc->pid);
1145 3efd8e31 2022-10-23 thomas kill(proc->pid, SIGKILL);
1147 3efd8e31 2022-10-23 thomas kill(proc->pid, SIGTERM);
1150 3efd8e31 2022-10-23 thomas static void
1151 3efd8e31 2022-10-23 thomas gotd_shutdown(void)
1153 3efd8e31 2022-10-23 thomas pid_t pid;
1154 3efd8e31 2022-10-23 thomas int status, i;
1155 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc;
1157 3efd8e31 2022-10-23 thomas for (i = 0; i < gotd.nprocs; i++) {
1158 3efd8e31 2022-10-23 thomas proc = &gotd.procs[i];
1159 3efd8e31 2022-10-23 thomas msgbuf_clear(&proc->iev.ibuf.w);
1160 3efd8e31 2022-10-23 thomas close(proc->iev.ibuf.fd);
1161 3efd8e31 2022-10-23 thomas kill_proc(proc, 0);
1164 3efd8e31 2022-10-23 thomas log_debug("waiting for children to terminate");
1166 3efd8e31 2022-10-23 thomas pid = wait(&status);
1167 3efd8e31 2022-10-23 thomas if (pid == -1) {
1168 3efd8e31 2022-10-23 thomas if (errno != EINTR && errno != ECHILD)
1169 3efd8e31 2022-10-23 thomas fatal("wait");
1170 3efd8e31 2022-10-23 thomas } else if (WIFSIGNALED(status)) {
1171 3efd8e31 2022-10-23 thomas proc = get_proc_for_pid(pid);
1172 3efd8e31 2022-10-23 thomas log_warnx("%s %s child process terminated; signal %d",
1173 3efd8e31 2022-10-23 thomas proc ? gotd_proc_names[proc->type] : "",
1174 3efd8e31 2022-10-23 thomas proc ? proc->chroot_path : "", WTERMSIG(status));
1176 3efd8e31 2022-10-23 thomas } while (pid != -1 || (pid == -1 && errno == EINTR));
1178 3efd8e31 2022-10-23 thomas log_info("terminating");
1179 3efd8e31 2022-10-23 thomas exit(0);
1183 3efd8e31 2022-10-23 thomas gotd_sighdlr(int sig, short event, void *arg)
1186 3efd8e31 2022-10-23 thomas * Normal signal handler rules don't apply because libevent
1187 3efd8e31 2022-10-23 thomas * decouples for us.
1190 3efd8e31 2022-10-23 thomas switch (sig) {
1191 3efd8e31 2022-10-23 thomas case SIGHUP:
1192 3efd8e31 2022-10-23 thomas log_info("%s: ignoring SIGHUP", __func__);
1194 3efd8e31 2022-10-23 thomas case SIGUSR1:
1195 3efd8e31 2022-10-23 thomas log_info("%s: ignoring SIGUSR1", __func__);
1197 3efd8e31 2022-10-23 thomas case SIGTERM:
1198 3efd8e31 2022-10-23 thomas case SIGINT:
1199 3efd8e31 2022-10-23 thomas gotd_shutdown();
1200 3efd8e31 2022-10-23 thomas log_warnx("gotd terminating");
1201 3efd8e31 2022-10-23 thomas exit(0);
1203 3efd8e31 2022-10-23 thomas default:
1204 3efd8e31 2022-10-23 thomas fatalx("unexpected signal");
1208 3efd8e31 2022-10-23 thomas static const struct got_error *
1209 3efd8e31 2022-10-23 thomas ensure_proc_is_reading(struct gotd_client *client,
1210 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc)
1212 3efd8e31 2022-10-23 thomas if (!client_is_reading(client)) {
1213 3efd8e31 2022-10-23 thomas kill_proc(proc, 1);
1214 3efd8e31 2022-10-23 thomas return got_error_fmt(GOT_ERR_BAD_PACKET,
1215 3efd8e31 2022-10-23 thomas "PID %d handled a read-request for uid %d but this "
1216 3efd8e31 2022-10-23 thomas "user is not reading from a repository", proc->pid,
1217 3efd8e31 2022-10-23 thomas client->euid);
1220 3efd8e31 2022-10-23 thomas return NULL;
1223 3efd8e31 2022-10-23 thomas static const struct got_error *
1224 3efd8e31 2022-10-23 thomas ensure_proc_is_writing(struct gotd_client *client,
1225 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc)
1227 3efd8e31 2022-10-23 thomas if (!client_is_writing(client)) {
1228 3efd8e31 2022-10-23 thomas kill_proc(proc, 1);
1229 3efd8e31 2022-10-23 thomas return got_error_fmt(GOT_ERR_BAD_PACKET,
1230 3efd8e31 2022-10-23 thomas "PID %d handled a write-request for uid %d but this "
1231 3efd8e31 2022-10-23 thomas "user is not writing to a repository", proc->pid,
1232 3efd8e31 2022-10-23 thomas client->euid);
1235 3efd8e31 2022-10-23 thomas return NULL;
1238 3efd8e31 2022-10-23 thomas static int
1239 3efd8e31 2022-10-23 thomas verify_imsg_src(struct gotd_client *client, struct gotd_child_proc *proc,
1240 3efd8e31 2022-10-23 thomas struct imsg *imsg)
1242 3efd8e31 2022-10-23 thomas const struct got_error *err;
1243 3efd8e31 2022-10-23 thomas struct gotd_child_proc *client_proc;
1244 3efd8e31 2022-10-23 thomas int ret = 0;
1246 3efd8e31 2022-10-23 thomas client_proc = get_client_proc(client);
1247 3efd8e31 2022-10-23 thomas if (proc->pid != client_proc->pid) {
1248 3efd8e31 2022-10-23 thomas kill_proc(proc, 1);
1249 3efd8e31 2022-10-23 thomas log_warnx("received message from PID %d for uid %d, while "
1250 3efd8e31 2022-10-23 thomas "PID %d is the process serving this user",
1251 3efd8e31 2022-10-23 thomas proc->pid, client->euid, client_proc->pid);
1252 3efd8e31 2022-10-23 thomas return 0;
1255 3efd8e31 2022-10-23 thomas switch (imsg->hdr.type) {
1256 3efd8e31 2022-10-23 thomas case GOTD_IMSG_ERROR:
1257 3efd8e31 2022-10-23 thomas ret = 1;
1259 3efd8e31 2022-10-23 thomas case GOTD_IMSG_PACKFILE_DONE:
1260 3efd8e31 2022-10-23 thomas err = ensure_proc_is_reading(client, proc);
1261 3efd8e31 2022-10-23 thomas if (err)
1262 3efd8e31 2022-10-23 thomas log_warnx("uid %d: %s", client->euid, err->msg);
1264 3efd8e31 2022-10-23 thomas ret = 1;
1266 3efd8e31 2022-10-23 thomas case GOTD_IMSG_PACKFILE_INSTALL:
1267 3efd8e31 2022-10-23 thomas case GOTD_IMSG_REF_UPDATES_START:
1268 3efd8e31 2022-10-23 thomas case GOTD_IMSG_REF_UPDATE:
1269 3efd8e31 2022-10-23 thomas err = ensure_proc_is_writing(client, proc);
1270 3efd8e31 2022-10-23 thomas if (err)
1271 3efd8e31 2022-10-23 thomas log_warnx("uid %d: %s", client->euid, err->msg);
1273 3efd8e31 2022-10-23 thomas ret = 1;
1275 3efd8e31 2022-10-23 thomas default:
1276 3efd8e31 2022-10-23 thomas log_debug("%s: unexpected imsg %d", __func__, imsg->hdr.type);
1280 3efd8e31 2022-10-23 thomas return ret;
1283 3efd8e31 2022-10-23 thomas static const struct got_error *
1284 3efd8e31 2022-10-23 thomas recv_packfile_done(uint32_t *client_id, struct imsg *imsg)
1286 3efd8e31 2022-10-23 thomas struct gotd_imsg_packfile_done idone;
1287 3efd8e31 2022-10-23 thomas size_t datalen;
1289 3efd8e31 2022-10-23 thomas log_debug("packfile-done received");
1291 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1292 3efd8e31 2022-10-23 thomas if (datalen != sizeof(idone))
1293 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1294 3efd8e31 2022-10-23 thomas memcpy(&idone, imsg->data, sizeof(idone));
1296 3efd8e31 2022-10-23 thomas *client_id = idone.client_id;
1297 3efd8e31 2022-10-23 thomas return NULL;
1300 3efd8e31 2022-10-23 thomas static const struct got_error *
1301 3efd8e31 2022-10-23 thomas recv_packfile_install(uint32_t *client_id, struct imsg *imsg)
1303 3efd8e31 2022-10-23 thomas struct gotd_imsg_packfile_install inst;
1304 3efd8e31 2022-10-23 thomas size_t datalen;
1306 3efd8e31 2022-10-23 thomas log_debug("packfile-install received");
1308 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1309 3efd8e31 2022-10-23 thomas if (datalen != sizeof(inst))
1310 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1311 3efd8e31 2022-10-23 thomas memcpy(&inst, imsg->data, sizeof(inst));
1313 3efd8e31 2022-10-23 thomas *client_id = inst.client_id;
1314 3efd8e31 2022-10-23 thomas return NULL;
1317 3efd8e31 2022-10-23 thomas static const struct got_error *
1318 3efd8e31 2022-10-23 thomas recv_ref_updates_start(uint32_t *client_id, struct imsg *imsg)
1320 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_updates_start istart;
1321 3efd8e31 2022-10-23 thomas size_t datalen;
1323 3efd8e31 2022-10-23 thomas log_debug("ref-updates-start received");
1325 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1326 3efd8e31 2022-10-23 thomas if (datalen != sizeof(istart))
1327 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1328 3efd8e31 2022-10-23 thomas memcpy(&istart, imsg->data, sizeof(istart));
1330 3efd8e31 2022-10-23 thomas *client_id = istart.client_id;
1331 3efd8e31 2022-10-23 thomas return NULL;
1334 3efd8e31 2022-10-23 thomas static const struct got_error *
1335 3efd8e31 2022-10-23 thomas recv_ref_update(uint32_t *client_id, struct imsg *imsg)
1337 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update iref;
1338 3efd8e31 2022-10-23 thomas size_t datalen;
1340 3efd8e31 2022-10-23 thomas log_debug("ref-update received");
1342 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1343 3efd8e31 2022-10-23 thomas if (datalen < sizeof(iref))
1344 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1345 3efd8e31 2022-10-23 thomas memcpy(&iref, imsg->data, sizeof(iref));
1347 3efd8e31 2022-10-23 thomas *client_id = iref.client_id;
1348 3efd8e31 2022-10-23 thomas return NULL;
1351 3efd8e31 2022-10-23 thomas static const struct got_error *
1352 3efd8e31 2022-10-23 thomas send_ref_update_ok(struct gotd_client *client,
1353 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update *iref, const char *refname)
1355 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update_ok iok;
1356 3efd8e31 2022-10-23 thomas struct ibuf *wbuf;
1357 3efd8e31 2022-10-23 thomas size_t len;
1359 3efd8e31 2022-10-23 thomas memset(&iok, 0, sizeof(iok));
1360 3efd8e31 2022-10-23 thomas iok.client_id = client->id;
1361 3efd8e31 2022-10-23 thomas memcpy(iok.old_id, iref->old_id, SHA1_DIGEST_LENGTH);
1362 3efd8e31 2022-10-23 thomas memcpy(iok.new_id, iref->new_id, SHA1_DIGEST_LENGTH);
1363 3efd8e31 2022-10-23 thomas iok.name_len = strlen(refname);
1365 3efd8e31 2022-10-23 thomas len = sizeof(iok) + iok.name_len;
1366 3efd8e31 2022-10-23 thomas wbuf = imsg_create(&client->iev.ibuf, GOTD_IMSG_REF_UPDATE_OK,
1367 3efd8e31 2022-10-23 thomas PROC_GOTD, gotd.pid, len);
1368 3efd8e31 2022-10-23 thomas if (wbuf == NULL)
1369 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_create REF_UPDATE_OK");
1371 3efd8e31 2022-10-23 thomas if (imsg_add(wbuf, &iok, sizeof(iok)) == -1)
1372 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_add REF_UPDATE_OK");
1373 3efd8e31 2022-10-23 thomas if (imsg_add(wbuf, refname, iok.name_len) == -1)
1374 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_add REF_UPDATE_OK");
1376 3efd8e31 2022-10-23 thomas wbuf->fd = -1;
1377 3efd8e31 2022-10-23 thomas imsg_close(&client->iev.ibuf, wbuf);
1378 3efd8e31 2022-10-23 thomas gotd_imsg_event_add(&client->iev);
1379 3efd8e31 2022-10-23 thomas return NULL;
1382 3efd8e31 2022-10-23 thomas static void
1383 3efd8e31 2022-10-23 thomas send_refs_updated(struct gotd_client *client)
1385 3efd8e31 2022-10-23 thomas if (gotd_imsg_compose_event(&client->iev,
1386 3efd8e31 2022-10-23 thomas GOTD_IMSG_REFS_UPDATED, PROC_GOTD, -1, NULL, 0) == -1)
1387 3efd8e31 2022-10-23 thomas log_warn("imsg compose REFS_UPDATED");
1390 3efd8e31 2022-10-23 thomas static const struct got_error *
1391 3efd8e31 2022-10-23 thomas send_ref_update_ng(struct gotd_client *client,
1392 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update *iref, const char *refname,
1393 3efd8e31 2022-10-23 thomas const char *reason)
1395 3efd8e31 2022-10-23 thomas const struct got_error *ng_err;
1396 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update_ng ing;
1397 3efd8e31 2022-10-23 thomas struct ibuf *wbuf;
1398 3efd8e31 2022-10-23 thomas size_t len;
1400 3efd8e31 2022-10-23 thomas memset(&ing, 0, sizeof(ing));
1401 3efd8e31 2022-10-23 thomas ing.client_id = client->id;
1402 3efd8e31 2022-10-23 thomas memcpy(ing.old_id, iref->old_id, SHA1_DIGEST_LENGTH);
1403 3efd8e31 2022-10-23 thomas memcpy(ing.new_id, iref->new_id, SHA1_DIGEST_LENGTH);
1404 3efd8e31 2022-10-23 thomas ing.name_len = strlen(refname);
1406 3efd8e31 2022-10-23 thomas ng_err = got_error_fmt(GOT_ERR_REF_BUSY, "%s", reason);
1407 3efd8e31 2022-10-23 thomas ing.reason_len = strlen(ng_err->msg);
1409 3efd8e31 2022-10-23 thomas len = sizeof(ing) + ing.name_len + ing.reason_len;
1410 3efd8e31 2022-10-23 thomas wbuf = imsg_create(&client->iev.ibuf, GOTD_IMSG_REF_UPDATE_NG,
1411 3efd8e31 2022-10-23 thomas PROC_GOTD, gotd.pid, len);
1412 3efd8e31 2022-10-23 thomas if (wbuf == NULL)
1413 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_create REF_UPDATE_NG");
1415 3efd8e31 2022-10-23 thomas if (imsg_add(wbuf, &ing, sizeof(ing)) == -1)
1416 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_add REF_UPDATE_NG");
1417 3efd8e31 2022-10-23 thomas if (imsg_add(wbuf, refname, ing.name_len) == -1)
1418 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_add REF_UPDATE_NG");
1419 3efd8e31 2022-10-23 thomas if (imsg_add(wbuf, ng_err->msg, ing.reason_len) == -1)
1420 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_add REF_UPDATE_NG");
1422 3efd8e31 2022-10-23 thomas wbuf->fd = -1;
1423 3efd8e31 2022-10-23 thomas imsg_close(&client->iev.ibuf, wbuf);
1424 3efd8e31 2022-10-23 thomas gotd_imsg_event_add(&client->iev);
1425 3efd8e31 2022-10-23 thomas return NULL;
1428 3efd8e31 2022-10-23 thomas static const struct got_error *
1429 3efd8e31 2022-10-23 thomas install_pack(struct gotd_client *client, const char *repo_path,
1430 3efd8e31 2022-10-23 thomas struct imsg *imsg)
1432 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
1433 3efd8e31 2022-10-23 thomas struct gotd_imsg_packfile_install inst;
1434 3efd8e31 2022-10-23 thomas char hex[SHA1_DIGEST_STRING_LENGTH];
1435 3efd8e31 2022-10-23 thomas size_t datalen;
1436 3efd8e31 2022-10-23 thomas char *packfile_path = NULL, *packidx_path = NULL;
1438 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1439 3efd8e31 2022-10-23 thomas if (datalen != sizeof(inst))
1440 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1441 3efd8e31 2022-10-23 thomas memcpy(&inst, imsg->data, sizeof(inst));
1443 3efd8e31 2022-10-23 thomas if (client->packfile_path == NULL)
1444 3efd8e31 2022-10-23 thomas return got_error_msg(GOT_ERR_BAD_REQUEST,
1445 3efd8e31 2022-10-23 thomas "client has no pack file");
1446 3efd8e31 2022-10-23 thomas if (client->packidx_path == NULL)
1447 3efd8e31 2022-10-23 thomas return got_error_msg(GOT_ERR_BAD_REQUEST,
1448 3efd8e31 2022-10-23 thomas "client has no pack file index");
1450 3efd8e31 2022-10-23 thomas if (got_sha1_digest_to_str(inst.pack_sha1, hex, sizeof(hex)) == NULL)
1451 3efd8e31 2022-10-23 thomas return got_error_msg(GOT_ERR_NO_SPACE,
1452 3efd8e31 2022-10-23 thomas "could not convert pack file SHA1 to hex");
1454 3efd8e31 2022-10-23 thomas if (asprintf(&packfile_path, "/%s/%s/pack-%s.pack",
1455 3efd8e31 2022-10-23 thomas repo_path, GOT_OBJECTS_PACK_DIR, hex) == -1) {
1456 3efd8e31 2022-10-23 thomas err = got_error_from_errno("asprintf");
1457 3efd8e31 2022-10-23 thomas goto done;
1460 3efd8e31 2022-10-23 thomas if (asprintf(&packidx_path, "/%s/%s/pack-%s.idx",
1461 3efd8e31 2022-10-23 thomas repo_path, GOT_OBJECTS_PACK_DIR, hex) == -1) {
1462 3efd8e31 2022-10-23 thomas err = got_error_from_errno("asprintf");
1463 3efd8e31 2022-10-23 thomas goto done;
1466 3efd8e31 2022-10-23 thomas if (rename(client->packfile_path, packfile_path) == -1) {
1467 3efd8e31 2022-10-23 thomas err = got_error_from_errno3("rename", client->packfile_path,
1468 3efd8e31 2022-10-23 thomas packfile_path);
1469 3efd8e31 2022-10-23 thomas goto done;
1472 3efd8e31 2022-10-23 thomas free(client->packfile_path);
1473 3efd8e31 2022-10-23 thomas client->packfile_path = NULL;
1475 3efd8e31 2022-10-23 thomas if (rename(client->packidx_path, packidx_path) == -1) {
1476 3efd8e31 2022-10-23 thomas err = got_error_from_errno3("rename", client->packidx_path,
1477 3efd8e31 2022-10-23 thomas packidx_path);
1478 3efd8e31 2022-10-23 thomas goto done;
1481 3efd8e31 2022-10-23 thomas free(client->packidx_path);
1482 3efd8e31 2022-10-23 thomas client->packidx_path = NULL;
1484 3efd8e31 2022-10-23 thomas free(packfile_path);
1485 3efd8e31 2022-10-23 thomas free(packidx_path);
1486 3efd8e31 2022-10-23 thomas return err;
1489 3efd8e31 2022-10-23 thomas static const struct got_error *
1490 3efd8e31 2022-10-23 thomas begin_ref_updates(struct gotd_client *client, struct imsg *imsg)
1492 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_updates_start istart;
1493 3efd8e31 2022-10-23 thomas size_t datalen;
1495 3efd8e31 2022-10-23 thomas if (client->nref_updates != -1)
1496 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_MSG);
1498 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1499 3efd8e31 2022-10-23 thomas if (datalen != sizeof(istart))
1500 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1501 3efd8e31 2022-10-23 thomas memcpy(&istart, imsg->data, sizeof(istart));
1503 3efd8e31 2022-10-23 thomas if (istart.nref_updates <= 0)
1504 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_MSG);
1506 3efd8e31 2022-10-23 thomas client->nref_updates = istart.nref_updates;
1507 3efd8e31 2022-10-23 thomas return NULL;
1510 3efd8e31 2022-10-23 thomas static const struct got_error *
1511 3efd8e31 2022-10-23 thomas update_ref(struct gotd_client *client, const char *repo_path,
1512 3efd8e31 2022-10-23 thomas struct imsg *imsg)
1514 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
1515 3efd8e31 2022-10-23 thomas struct got_repository *repo = NULL;
1516 3efd8e31 2022-10-23 thomas struct got_reference *ref = NULL;
1517 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update iref;
1518 3efd8e31 2022-10-23 thomas struct got_object_id old_id, new_id;
1519 3efd8e31 2022-10-23 thomas struct got_object_id *id = NULL;
1520 3efd8e31 2022-10-23 thomas struct got_object *obj = NULL;
1521 3efd8e31 2022-10-23 thomas char *refname = NULL;
1522 3efd8e31 2022-10-23 thomas size_t datalen;
1523 3efd8e31 2022-10-23 thomas int locked = 0;
1525 3efd8e31 2022-10-23 thomas log_debug("update-ref from uid %d", client->euid);
1527 3efd8e31 2022-10-23 thomas if (client->nref_updates <= 0)
1528 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_MSG);
1530 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1531 3efd8e31 2022-10-23 thomas if (datalen < sizeof(iref))
1532 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1533 3efd8e31 2022-10-23 thomas memcpy(&iref, imsg->data, sizeof(iref));
1534 3efd8e31 2022-10-23 thomas if (datalen != sizeof(iref) + iref.name_len)
1535 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1536 3efd8e31 2022-10-23 thomas refname = malloc(iref.name_len + 1);
1537 3efd8e31 2022-10-23 thomas if (refname == NULL)
1538 3efd8e31 2022-10-23 thomas return got_error_from_errno("malloc");
1539 3efd8e31 2022-10-23 thomas memcpy(refname, imsg->data + sizeof(iref), iref.name_len);
1540 3efd8e31 2022-10-23 thomas refname[iref.name_len] = '\0';
1542 3efd8e31 2022-10-23 thomas log_debug("updating ref %s for uid %d", refname, client->euid);
1544 3efd8e31 2022-10-23 thomas err = got_repo_open(&repo, repo_path, NULL, NULL);
1545 3efd8e31 2022-10-23 thomas if (err)
1546 3efd8e31 2022-10-23 thomas goto done;
1548 3efd8e31 2022-10-23 thomas memcpy(old_id.sha1, iref.old_id, SHA1_DIGEST_LENGTH);
1549 3efd8e31 2022-10-23 thomas memcpy(new_id.sha1, iref.new_id, SHA1_DIGEST_LENGTH);
1550 3efd8e31 2022-10-23 thomas err = got_object_open(&obj, repo, &new_id);
1551 3efd8e31 2022-10-23 thomas if (err)
1552 3efd8e31 2022-10-23 thomas goto done;
1554 3efd8e31 2022-10-23 thomas if (iref.ref_is_new) {
1555 3efd8e31 2022-10-23 thomas err = got_ref_open(&ref, repo, refname, 0);
1556 3efd8e31 2022-10-23 thomas if (err) {
1557 3efd8e31 2022-10-23 thomas if (err->code != GOT_ERR_NOT_REF)
1558 3efd8e31 2022-10-23 thomas goto done;
1559 3efd8e31 2022-10-23 thomas err = got_ref_alloc(&ref, refname, &new_id);
1560 3efd8e31 2022-10-23 thomas if (err)
1561 3efd8e31 2022-10-23 thomas goto done;
1562 3efd8e31 2022-10-23 thomas err = got_ref_write(ref, repo); /* will lock/unlock */
1563 3efd8e31 2022-10-23 thomas if (err)
1564 3efd8e31 2022-10-23 thomas goto done;
1565 3efd8e31 2022-10-23 thomas } else {
1566 3efd8e31 2022-10-23 thomas err = got_error_fmt(GOT_ERR_REF_BUSY,
1567 3efd8e31 2022-10-23 thomas "%s has been created by someone else "
1568 3efd8e31 2022-10-23 thomas "while transaction was in progress",
1569 3efd8e31 2022-10-23 thomas got_ref_get_name(ref));
1570 3efd8e31 2022-10-23 thomas goto done;
1572 3efd8e31 2022-10-23 thomas } else {
1573 3efd8e31 2022-10-23 thomas err = got_ref_open(&ref, repo, refname, 1 /* lock */);
1574 3efd8e31 2022-10-23 thomas if (err)
1575 3efd8e31 2022-10-23 thomas goto done;
1576 3efd8e31 2022-10-23 thomas locked = 1;
1578 3efd8e31 2022-10-23 thomas err = got_ref_resolve(&id, repo, ref);
1579 3efd8e31 2022-10-23 thomas if (err)
1580 3efd8e31 2022-10-23 thomas goto done;
1582 3efd8e31 2022-10-23 thomas if (got_object_id_cmp(id, &old_id) != 0) {
1583 3efd8e31 2022-10-23 thomas err = got_error_fmt(GOT_ERR_REF_BUSY,
1584 3efd8e31 2022-10-23 thomas "%s has been modified by someone else "
1585 3efd8e31 2022-10-23 thomas "while transaction was in progress",
1586 3efd8e31 2022-10-23 thomas got_ref_get_name(ref));
1587 3efd8e31 2022-10-23 thomas goto done;
1590 3efd8e31 2022-10-23 thomas err = got_ref_change_ref(ref, &new_id);
1591 3efd8e31 2022-10-23 thomas if (err)
1592 3efd8e31 2022-10-23 thomas goto done;
1594 3efd8e31 2022-10-23 thomas err = got_ref_write(ref, repo);
1595 3efd8e31 2022-10-23 thomas if (err)
1596 3efd8e31 2022-10-23 thomas goto done;
1598 3efd8e31 2022-10-23 thomas free(id);
1599 3efd8e31 2022-10-23 thomas id = NULL;
1602 3efd8e31 2022-10-23 thomas if (err) {
1603 3efd8e31 2022-10-23 thomas if (err->code == GOT_ERR_LOCKFILE_TIMEOUT) {
1604 3efd8e31 2022-10-23 thomas err = got_error_fmt(GOT_ERR_LOCKFILE_TIMEOUT,
1605 3efd8e31 2022-10-23 thomas "could not acquire exclusive file lock for %s",
1606 3efd8e31 2022-10-23 thomas refname);
1608 3efd8e31 2022-10-23 thomas send_ref_update_ng(client, &iref, refname, err->msg);
1610 3efd8e31 2022-10-23 thomas send_ref_update_ok(client, &iref, refname);
1612 3efd8e31 2022-10-23 thomas if (client->nref_updates > 0) {
1613 3efd8e31 2022-10-23 thomas client->nref_updates--;
1614 3efd8e31 2022-10-23 thomas if (client->nref_updates == 0)
1615 3efd8e31 2022-10-23 thomas send_refs_updated(client);
1618 3efd8e31 2022-10-23 thomas if (locked) {
1619 3efd8e31 2022-10-23 thomas const struct got_error *unlock_err;
1620 3efd8e31 2022-10-23 thomas unlock_err = got_ref_unlock(ref);
1621 3efd8e31 2022-10-23 thomas if (unlock_err && err == NULL)
1622 3efd8e31 2022-10-23 thomas err = unlock_err;
1624 3efd8e31 2022-10-23 thomas if (ref)
1625 3efd8e31 2022-10-23 thomas got_ref_close(ref);
1626 3efd8e31 2022-10-23 thomas if (obj)
1627 3efd8e31 2022-10-23 thomas got_object_close(obj);
1628 3efd8e31 2022-10-23 thomas if (repo)
1629 3efd8e31 2022-10-23 thomas got_repo_close(repo);
1630 3efd8e31 2022-10-23 thomas free(refname);
1631 3efd8e31 2022-10-23 thomas free(id);
1632 3efd8e31 2022-10-23 thomas return err;
1635 3efd8e31 2022-10-23 thomas static void
1636 3efd8e31 2022-10-23 thomas gotd_dispatch(int fd, short event, void *arg)
1638 3efd8e31 2022-10-23 thomas struct gotd_imsgev *iev = arg;
1639 3efd8e31 2022-10-23 thomas struct imsgbuf *ibuf = &iev->ibuf;
1640 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc = NULL;
1641 3efd8e31 2022-10-23 thomas ssize_t n;
1642 3efd8e31 2022-10-23 thomas int shut = 0;
1643 3efd8e31 2022-10-23 thomas struct imsg imsg;
1645 3efd8e31 2022-10-23 thomas if (event & EV_READ) {
1646 3efd8e31 2022-10-23 thomas if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
1647 3efd8e31 2022-10-23 thomas fatal("imsg_read error");
1648 3efd8e31 2022-10-23 thomas if (n == 0) {
1649 3efd8e31 2022-10-23 thomas /* Connection closed. */
1650 3efd8e31 2022-10-23 thomas shut = 1;
1651 3efd8e31 2022-10-23 thomas goto done;
1655 3efd8e31 2022-10-23 thomas if (event & EV_WRITE) {
1656 3efd8e31 2022-10-23 thomas n = msgbuf_write(&ibuf->w);
1657 3efd8e31 2022-10-23 thomas if (n == -1 && errno != EAGAIN)
1658 3efd8e31 2022-10-23 thomas fatal("msgbuf_write");
1659 3efd8e31 2022-10-23 thomas if (n == 0) {
1660 3efd8e31 2022-10-23 thomas /* Connection closed. */
1661 3efd8e31 2022-10-23 thomas shut = 1;
1662 3efd8e31 2022-10-23 thomas goto done;
1666 3efd8e31 2022-10-23 thomas proc = find_proc_by_fd(fd);
1667 3efd8e31 2022-10-23 thomas if (proc == NULL)
1668 3efd8e31 2022-10-23 thomas fatalx("cannot find child process for fd %d", fd);
1670 3efd8e31 2022-10-23 thomas for (;;) {
1671 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
1672 3efd8e31 2022-10-23 thomas struct gotd_client *client = NULL;
1673 3efd8e31 2022-10-23 thomas uint32_t client_id = 0;
1674 3efd8e31 2022-10-23 thomas int do_disconnect = 0;
1675 3efd8e31 2022-10-23 thomas int do_ref_updates = 0, do_ref_update = 0;
1676 3efd8e31 2022-10-23 thomas int do_packfile_install = 0;
1678 3efd8e31 2022-10-23 thomas if ((n = imsg_get(ibuf, &imsg)) == -1)
1679 3efd8e31 2022-10-23 thomas fatal("%s: imsg_get error", __func__);
1680 3efd8e31 2022-10-23 thomas if (n == 0) /* No more messages. */
1683 3efd8e31 2022-10-23 thomas switch (imsg.hdr.type) {
1684 3efd8e31 2022-10-23 thomas case GOTD_IMSG_ERROR:
1685 3efd8e31 2022-10-23 thomas do_disconnect = 1;
1686 3efd8e31 2022-10-23 thomas err = gotd_imsg_recv_error(&client_id, &imsg);
1688 3efd8e31 2022-10-23 thomas case GOTD_IMSG_PACKFILE_DONE:
1689 3efd8e31 2022-10-23 thomas do_disconnect = 1;
1690 3efd8e31 2022-10-23 thomas err = recv_packfile_done(&client_id, &imsg);
1692 3efd8e31 2022-10-23 thomas case GOTD_IMSG_PACKFILE_INSTALL:
1693 3efd8e31 2022-10-23 thomas err = recv_packfile_install(&client_id, &imsg);
1694 3efd8e31 2022-10-23 thomas if (err == NULL)
1695 3efd8e31 2022-10-23 thomas do_packfile_install = 1;
1697 3efd8e31 2022-10-23 thomas case GOTD_IMSG_REF_UPDATES_START:
1698 3efd8e31 2022-10-23 thomas err = recv_ref_updates_start(&client_id, &imsg);
1699 3efd8e31 2022-10-23 thomas if (err == NULL)
1700 3efd8e31 2022-10-23 thomas do_ref_updates = 1;
1702 3efd8e31 2022-10-23 thomas case GOTD_IMSG_REF_UPDATE:
1703 3efd8e31 2022-10-23 thomas err = recv_ref_update(&client_id, &imsg);
1704 3efd8e31 2022-10-23 thomas if (err == NULL)
1705 3efd8e31 2022-10-23 thomas do_ref_update = 1;
1707 3efd8e31 2022-10-23 thomas default:
1708 3efd8e31 2022-10-23 thomas log_debug("unexpected imsg %d", imsg.hdr.type);
1712 3efd8e31 2022-10-23 thomas client = find_client(client_id);
1713 3efd8e31 2022-10-23 thomas if (client == NULL) {
1714 3efd8e31 2022-10-23 thomas log_warnx("%s: client not found", __func__);
1715 3efd8e31 2022-10-23 thomas imsg_free(&imsg);
1716 3efd8e31 2022-10-23 thomas continue;
1719 3efd8e31 2022-10-23 thomas if (!verify_imsg_src(client, proc, &imsg)) {
1720 3efd8e31 2022-10-23 thomas log_debug("dropping imsg type %d from PID %d",
1721 3efd8e31 2022-10-23 thomas imsg.hdr.type, proc->pid);
1722 3efd8e31 2022-10-23 thomas imsg_free(&imsg);
1723 3efd8e31 2022-10-23 thomas continue;
1725 3efd8e31 2022-10-23 thomas if (err)
1726 3efd8e31 2022-10-23 thomas log_warnx("uid %d: %s", client->euid, err->msg);
1728 3efd8e31 2022-10-23 thomas if (do_disconnect) {
1729 3efd8e31 2022-10-23 thomas if (err)
1730 3efd8e31 2022-10-23 thomas disconnect_on_error(client, err);
1732 3efd8e31 2022-10-23 thomas disconnect(client);
1733 3efd8e31 2022-10-23 thomas } else if (do_packfile_install)
1734 3efd8e31 2022-10-23 thomas err = install_pack(client, proc->chroot_path, &imsg);
1735 3efd8e31 2022-10-23 thomas else if (do_ref_updates)
1736 3efd8e31 2022-10-23 thomas err = begin_ref_updates(client, &imsg);
1737 3efd8e31 2022-10-23 thomas else if (do_ref_update)
1738 3efd8e31 2022-10-23 thomas err = update_ref(client, proc->chroot_path, &imsg);
1740 3efd8e31 2022-10-23 thomas if (err)
1741 3efd8e31 2022-10-23 thomas log_warnx("uid %d: %s", client->euid, err->msg);
1742 3efd8e31 2022-10-23 thomas imsg_free(&imsg);
1745 3efd8e31 2022-10-23 thomas if (!shut) {
1746 3efd8e31 2022-10-23 thomas gotd_imsg_event_add(iev);
1747 3efd8e31 2022-10-23 thomas } else {
1748 3efd8e31 2022-10-23 thomas /* This pipe is dead. Remove its event handler */
1749 3efd8e31 2022-10-23 thomas event_del(&iev->ev);
1750 3efd8e31 2022-10-23 thomas event_loopexit(NULL);
1754 3efd8e31 2022-10-23 thomas static pid_t
1755 3efd8e31 2022-10-23 thomas start_child(enum gotd_procid proc_id, const char *chroot_path,
1756 3efd8e31 2022-10-23 thomas char *argv0, int fd, int daemonize, int verbosity)
1758 3efd8e31 2022-10-23 thomas char *argv[9];
1759 3efd8e31 2022-10-23 thomas int argc = 0;
1760 3efd8e31 2022-10-23 thomas pid_t pid;
1762 3efd8e31 2022-10-23 thomas switch (pid = fork()) {
1763 3efd8e31 2022-10-23 thomas case -1:
1764 3efd8e31 2022-10-23 thomas fatal("cannot fork");
1767 3efd8e31 2022-10-23 thomas default:
1768 3efd8e31 2022-10-23 thomas close(fd);
1769 3efd8e31 2022-10-23 thomas return pid;
1772 3efd8e31 2022-10-23 thomas if (fd != GOTD_SOCK_FILENO) {
1773 3efd8e31 2022-10-23 thomas if (dup2(fd, GOTD_SOCK_FILENO) == -1)
1774 3efd8e31 2022-10-23 thomas fatal("cannot setup imsg fd");
1775 3efd8e31 2022-10-23 thomas } else if (fcntl(fd, F_SETFD, 0) == -1)
1776 3efd8e31 2022-10-23 thomas fatal("cannot setup imsg fd");
1778 3efd8e31 2022-10-23 thomas argv[argc++] = argv0;
1779 3efd8e31 2022-10-23 thomas switch (proc_id) {
1780 3efd8e31 2022-10-23 thomas case PROC_REPO_READ:
1781 3efd8e31 2022-10-23 thomas argv[argc++] = (char *)"-R";
1783 3efd8e31 2022-10-23 thomas case PROC_REPO_WRITE:
1784 3efd8e31 2022-10-23 thomas argv[argc++] = (char *)"-W";
1786 3efd8e31 2022-10-23 thomas default:
1787 3efd8e31 2022-10-23 thomas fatalx("invalid process id %d", proc_id);
1790 3efd8e31 2022-10-23 thomas argv[argc++] = (char *)"-P";
1791 3efd8e31 2022-10-23 thomas argv[argc++] = (char *)chroot_path;
1793 3efd8e31 2022-10-23 thomas if (!daemonize)
1794 3efd8e31 2022-10-23 thomas argv[argc++] = (char *)"-d";
1795 3efd8e31 2022-10-23 thomas if (verbosity > 0)
1796 3efd8e31 2022-10-23 thomas argv[argc++] = (char *)"-v";
1797 3efd8e31 2022-10-23 thomas if (verbosity > 1)
1798 3efd8e31 2022-10-23 thomas argv[argc++] = (char *)"-v";
1799 3efd8e31 2022-10-23 thomas argv[argc++] = NULL;
1801 3efd8e31 2022-10-23 thomas execvp(argv0, argv);
1802 3efd8e31 2022-10-23 thomas fatal("execvp");
1805 3efd8e31 2022-10-23 thomas static void
1806 3efd8e31 2022-10-23 thomas start_repo_children(struct gotd *gotd, char *argv0, int daemonize,
1807 3efd8e31 2022-10-23 thomas int verbosity)
1809 3efd8e31 2022-10-23 thomas struct gotd_repo *repo = NULL;
1810 3efd8e31 2022-10-23 thomas struct gotd_child_proc *proc;
1814 3efd8e31 2022-10-23 thomas * XXX For now, use one reader and one writer per repository.
1815 3efd8e31 2022-10-23 thomas * This should be changed to N readers + M writers.
1817 3efd8e31 2022-10-23 thomas gotd->nprocs = gotd->nrepos * 2;
1818 3efd8e31 2022-10-23 thomas gotd->procs = calloc(gotd->nprocs, sizeof(*gotd->procs));
1819 3efd8e31 2022-10-23 thomas if (gotd->procs == NULL)
1820 3efd8e31 2022-10-23 thomas fatal("calloc");
1821 3efd8e31 2022-10-23 thomas for (i = 0; i < gotd->nprocs; i++) {
1822 3efd8e31 2022-10-23 thomas if (repo == NULL)
1823 3efd8e31 2022-10-23 thomas repo = TAILQ_FIRST(&gotd->repos);
1824 3efd8e31 2022-10-23 thomas proc = &gotd->procs[i];
1825 3efd8e31 2022-10-23 thomas if (i < gotd->nrepos)
1826 3efd8e31 2022-10-23 thomas proc->type = PROC_REPO_READ;
1828 3efd8e31 2022-10-23 thomas proc->type = PROC_REPO_WRITE;
1829 3efd8e31 2022-10-23 thomas if (strlcpy(proc->repo_name, repo->name,
1830 3efd8e31 2022-10-23 thomas sizeof(proc->repo_name)) >= sizeof(proc->repo_name))
1831 3efd8e31 2022-10-23 thomas fatalx("repository name too long: %s", repo->name);
1832 3efd8e31 2022-10-23 thomas log_debug("adding repository %s", repo->name);
1833 3efd8e31 2022-10-23 thomas if (realpath(repo->path, proc->chroot_path) == NULL)
1834 3efd8e31 2022-10-23 thomas fatal("%s", repo->path);
1835 3efd8e31 2022-10-23 thomas if (socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK,
1836 3efd8e31 2022-10-23 thomas PF_UNSPEC, proc->pipe) == -1)
1837 3efd8e31 2022-10-23 thomas fatal("socketpair");
1838 3efd8e31 2022-10-23 thomas proc->pid = start_child(proc->type, proc->chroot_path, argv0,
1839 3efd8e31 2022-10-23 thomas proc->pipe[1], daemonize, verbosity);
1840 3efd8e31 2022-10-23 thomas imsg_init(&proc->iev.ibuf, proc->pipe[0]);
1841 3efd8e31 2022-10-23 thomas log_debug("proc %s %s is on fd %d",
1842 3efd8e31 2022-10-23 thomas gotd_proc_names[proc->type], proc->chroot_path,
1843 3efd8e31 2022-10-23 thomas proc->pipe[0]);
1844 3efd8e31 2022-10-23 thomas proc->iev.handler = gotd_dispatch;
1845 3efd8e31 2022-10-23 thomas proc->iev.events = EV_READ;
1846 3efd8e31 2022-10-23 thomas proc->iev.handler_arg = NULL;
1847 3efd8e31 2022-10-23 thomas event_set(&proc->iev.ev, proc->iev.ibuf.fd, EV_READ,
1848 3efd8e31 2022-10-23 thomas gotd_dispatch, &proc->iev);
1850 3efd8e31 2022-10-23 thomas repo = TAILQ_NEXT(repo, entry);
1854 3efd8e31 2022-10-23 thomas static void
1855 3efd8e31 2022-10-23 thomas apply_unveil(void)
1857 3efd8e31 2022-10-23 thomas struct gotd_repo *repo;
1859 3efd8e31 2022-10-23 thomas TAILQ_FOREACH(repo, &gotd.repos, entry) {
1860 3efd8e31 2022-10-23 thomas if (unveil(repo->path, "rwc") == -1)
1861 3efd8e31 2022-10-23 thomas fatal("unveil %s", repo->path);
1864 3efd8e31 2022-10-23 thomas if (unveil(GOT_TMPDIR_STR, "rwc") == -1)
1865 3efd8e31 2022-10-23 thomas fatal("unveil %s", GOT_TMPDIR_STR);
1867 3efd8e31 2022-10-23 thomas if (unveil(NULL, NULL) == -1)
1868 3efd8e31 2022-10-23 thomas fatal("unveil");
1872 3efd8e31 2022-10-23 thomas main(int argc, char **argv)
1874 3efd8e31 2022-10-23 thomas const struct got_error *error = NULL;
1875 3efd8e31 2022-10-23 thomas int ch, fd = -1, daemonize = 1, verbosity = 0, noaction = 0;
1876 3efd8e31 2022-10-23 thomas const char *confpath = GOTD_CONF_PATH;
1877 3efd8e31 2022-10-23 thomas char *argv0 = argv[0];
1878 3efd8e31 2022-10-23 thomas char title[2048];
1879 3efd8e31 2022-10-23 thomas gid_t groups[NGROUPS_MAX + 1];
1880 3efd8e31 2022-10-23 thomas int ngroups = NGROUPS_MAX + 1;
1881 3efd8e31 2022-10-23 thomas struct passwd *pw = NULL;
1882 3efd8e31 2022-10-23 thomas struct group *gr = NULL;
1883 3efd8e31 2022-10-23 thomas char *repo_path = NULL;
1884 3efd8e31 2022-10-23 thomas enum gotd_procid proc_id = PROC_GOTD;
1885 3efd8e31 2022-10-23 thomas struct event evsigint, evsigterm, evsighup, evsigusr1;
1886 3efd8e31 2022-10-23 thomas int *pack_fds = NULL, *temp_fds = NULL;
1888 3efd8e31 2022-10-23 thomas log_init(1, LOG_DAEMON); /* Log to stderr until daemonized. */
1890 3efd8e31 2022-10-23 thomas while ((ch = getopt(argc, argv, "df:nvRWP:")) != -1) {
1891 3efd8e31 2022-10-23 thomas switch (ch) {
1892 3efd8e31 2022-10-23 thomas case 'd':
1893 3efd8e31 2022-10-23 thomas daemonize = 0;
1895 3efd8e31 2022-10-23 thomas case 'f':
1896 3efd8e31 2022-10-23 thomas confpath = optarg;
1898 3efd8e31 2022-10-23 thomas case 'n':
1899 3efd8e31 2022-10-23 thomas noaction = 1;
1901 3efd8e31 2022-10-23 thomas case 'v':
1902 3efd8e31 2022-10-23 thomas if (verbosity < 3)
1903 3efd8e31 2022-10-23 thomas verbosity++;
1905 3efd8e31 2022-10-23 thomas case 'R':
1906 3efd8e31 2022-10-23 thomas proc_id = PROC_REPO_READ;
1908 3efd8e31 2022-10-23 thomas case 'W':
1909 3efd8e31 2022-10-23 thomas proc_id = PROC_REPO_WRITE;
1911 3efd8e31 2022-10-23 thomas case 'P':
1912 3efd8e31 2022-10-23 thomas repo_path = realpath(optarg, NULL);
1913 3efd8e31 2022-10-23 thomas if (repo_path == NULL)
1914 3efd8e31 2022-10-23 thomas fatal("realpath '%s'", optarg);
1916 3efd8e31 2022-10-23 thomas default:
1917 3efd8e31 2022-10-23 thomas usage();
1921 3efd8e31 2022-10-23 thomas argc -= optind;
1922 3efd8e31 2022-10-23 thomas argv += optind;
1924 3efd8e31 2022-10-23 thomas if (argc != 0)
1925 3efd8e31 2022-10-23 thomas usage();
1927 3efd8e31 2022-10-23 thomas if (geteuid())
1928 3efd8e31 2022-10-23 thomas fatalx("need root privileges");
1930 3efd8e31 2022-10-23 thomas log_init(daemonize ? 0 : 1, LOG_DAEMON);
1931 3efd8e31 2022-10-23 thomas log_setverbose(verbosity);
1933 3efd8e31 2022-10-23 thomas if (parse_config(confpath, proc_id, &gotd) != 0)
1934 3efd8e31 2022-10-23 thomas return 1;
1936 3efd8e31 2022-10-23 thomas if (proc_id == PROC_GOTD &&
1937 3efd8e31 2022-10-23 thomas (gotd.nrepos == 0 || TAILQ_EMPTY(&gotd.repos)))
1938 3efd8e31 2022-10-23 thomas fatalx("no repository defined in configuration file");
1940 3efd8e31 2022-10-23 thomas pw = getpwnam(gotd.user_name);
1941 3efd8e31 2022-10-23 thomas if (pw == NULL)
1942 3efd8e31 2022-10-23 thomas fatal("getpwuid: user %s not found", gotd.user_name);
1944 3efd8e31 2022-10-23 thomas if (pw->pw_uid == 0) {
1945 3efd8e31 2022-10-23 thomas fatalx("cannot run %s as %s: the user running %s "
1946 3efd8e31 2022-10-23 thomas "must not be the superuser",
1947 3efd8e31 2022-10-23 thomas getprogname(), pw->pw_name, getprogname());
1950 3efd8e31 2022-10-23 thomas if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups) == -1)
1951 3efd8e31 2022-10-23 thomas log_warnx("group membership list truncated");
1953 3efd8e31 2022-10-23 thomas gr = match_group(groups, ngroups, gotd.unix_group_name);
1954 3efd8e31 2022-10-23 thomas if (gr == NULL) {
1955 3efd8e31 2022-10-23 thomas fatalx("cannot start %s: the user running %s "
1956 3efd8e31 2022-10-23 thomas "must be a secondary member of group %s",
1957 3efd8e31 2022-10-23 thomas getprogname(), getprogname(), gotd.unix_group_name);
1959 3efd8e31 2022-10-23 thomas if (gr->gr_gid == pw->pw_gid) {
1960 3efd8e31 2022-10-23 thomas fatalx("cannot start %s: the user running %s "
1961 3efd8e31 2022-10-23 thomas "must be a secondary member of group %s, but "
1962 3efd8e31 2022-10-23 thomas "%s is the user's primary group",
1963 3efd8e31 2022-10-23 thomas getprogname(), getprogname(), gotd.unix_group_name,
1964 3efd8e31 2022-10-23 thomas gotd.unix_group_name);
1967 3efd8e31 2022-10-23 thomas if (proc_id == PROC_GOTD &&
1968 3efd8e31 2022-10-23 thomas !got_path_is_absolute(gotd.unix_socket_path))
1969 3efd8e31 2022-10-23 thomas fatalx("bad unix socket path \"%s\": must be an absolute path",
1970 3efd8e31 2022-10-23 thomas gotd.unix_socket_path);
1972 3efd8e31 2022-10-23 thomas if (noaction)
1973 3efd8e31 2022-10-23 thomas return 0;
1975 3efd8e31 2022-10-23 thomas if (proc_id == PROC_GOTD && verbosity) {
1976 3efd8e31 2022-10-23 thomas log_info("socket: %s", gotd.unix_socket_path);
1977 3efd8e31 2022-10-23 thomas log_info("user: %s", pw->pw_name);
1978 3efd8e31 2022-10-23 thomas log_info("secondary group: %s", gr->gr_name);
1980 3efd8e31 2022-10-23 thomas fd = unix_socket_listen(gotd.unix_socket_path, pw->pw_uid,
1981 3efd8e31 2022-10-23 thomas gr->gr_gid);
1982 3efd8e31 2022-10-23 thomas if (fd == -1) {
1983 3efd8e31 2022-10-23 thomas fatal("cannot listen on unix socket %s",
1984 3efd8e31 2022-10-23 thomas gotd.unix_socket_path);
1988 3efd8e31 2022-10-23 thomas if (proc_id == PROC_GOTD) {
1989 3efd8e31 2022-10-23 thomas gotd.pid = getpid();
1990 3efd8e31 2022-10-23 thomas snprintf(title, sizeof(title), "%s", gotd_proc_names[proc_id]);
1991 3efd8e31 2022-10-23 thomas start_repo_children(&gotd, argv0, daemonize, verbosity);
1992 3efd8e31 2022-10-23 thomas arc4random_buf(&clients_hash_key, sizeof(clients_hash_key));
1993 3efd8e31 2022-10-23 thomas if (daemonize && daemon(0, 0) == -1)
1994 3efd8e31 2022-10-23 thomas fatal("daemon");
1995 3efd8e31 2022-10-23 thomas } else if (proc_id == PROC_REPO_READ || proc_id == PROC_REPO_WRITE) {
1996 3efd8e31 2022-10-23 thomas error = got_repo_pack_fds_open(&pack_fds);
1997 3efd8e31 2022-10-23 thomas if (error != NULL)
1998 3efd8e31 2022-10-23 thomas fatalx("cannot open pack tempfiles: %s", error->msg);
1999 3efd8e31 2022-10-23 thomas error = got_repo_temp_fds_open(&temp_fds);
2000 3efd8e31 2022-10-23 thomas if (error != NULL)
2001 3efd8e31 2022-10-23 thomas fatalx("cannot open pack tempfiles: %s", error->msg);
2002 3efd8e31 2022-10-23 thomas if (repo_path == NULL)
2003 3efd8e31 2022-10-23 thomas fatalx("repository path not specified");
2004 3efd8e31 2022-10-23 thomas snprintf(title, sizeof(title), "%s %s",
2005 3efd8e31 2022-10-23 thomas gotd_proc_names[proc_id], repo_path);
2006 3efd8e31 2022-10-23 thomas if (chroot(repo_path) == -1)
2007 3efd8e31 2022-10-23 thomas fatal("chroot");
2008 3efd8e31 2022-10-23 thomas if (chdir("/") == -1)
2009 3efd8e31 2022-10-23 thomas fatal("chdir(\"/\")");
2010 3efd8e31 2022-10-23 thomas if (daemonize && daemon(1, 0) == -1)
2011 3efd8e31 2022-10-23 thomas fatal("daemon");
2013 3efd8e31 2022-10-23 thomas fatal("invalid process id %d", proc_id);
2015 3efd8e31 2022-10-23 thomas setproctitle("%s", title);
2016 3efd8e31 2022-10-23 thomas log_procinit(title);
2018 3efd8e31 2022-10-23 thomas /* Drop root privileges. */
2019 3efd8e31 2022-10-23 thomas if (setgid(pw->pw_gid) == -1)
2020 3efd8e31 2022-10-23 thomas fatal("setgid %d failed", pw->pw_gid);
2021 3efd8e31 2022-10-23 thomas if (setuid(pw->pw_uid) == -1)
2022 3efd8e31 2022-10-23 thomas fatal("setuid %d failed", pw->pw_uid);
2024 3efd8e31 2022-10-23 thomas event_init();
2026 3efd8e31 2022-10-23 thomas switch (proc_id) {
2027 3efd8e31 2022-10-23 thomas case PROC_GOTD:
2028 3efd8e31 2022-10-23 thomas #ifndef PROFILE
2029 3efd8e31 2022-10-23 thomas if (pledge("stdio rpath wpath cpath proc getpw sendfd recvfd "
2030 3efd8e31 2022-10-23 thomas "fattr flock unix unveil", NULL) == -1)
2031 3efd8e31 2022-10-23 thomas err(1, "pledge");
2034 3efd8e31 2022-10-23 thomas case PROC_REPO_READ:
2035 3efd8e31 2022-10-23 thomas #ifndef PROFILE
2036 3efd8e31 2022-10-23 thomas if (pledge("stdio rpath sendfd recvfd", NULL) == -1)
2037 3efd8e31 2022-10-23 thomas err(1, "pledge");
2039 3efd8e31 2022-10-23 thomas repo_read_main(title, pack_fds, temp_fds);
2040 3efd8e31 2022-10-23 thomas /* NOTREACHED */
2041 3efd8e31 2022-10-23 thomas exit(0);
2042 3efd8e31 2022-10-23 thomas case PROC_REPO_WRITE:
2043 3efd8e31 2022-10-23 thomas #ifndef PROFILE
2044 3efd8e31 2022-10-23 thomas if (pledge("stdio rpath sendfd recvfd", NULL) == -1)
2045 3efd8e31 2022-10-23 thomas err(1, "pledge");
2047 3efd8e31 2022-10-23 thomas repo_write_main(title, pack_fds, temp_fds);
2048 3efd8e31 2022-10-23 thomas /* NOTREACHED */
2049 3efd8e31 2022-10-23 thomas exit(0);
2050 3efd8e31 2022-10-23 thomas default:
2051 3efd8e31 2022-10-23 thomas fatal("invalid process id %d", proc_id);
2054 3efd8e31 2022-10-23 thomas if (proc_id != PROC_GOTD)
2055 3efd8e31 2022-10-23 thomas fatal("invalid process id %d", proc_id);
2057 3efd8e31 2022-10-23 thomas apply_unveil();
2059 3efd8e31 2022-10-23 thomas signal_set(&evsigint, SIGINT, gotd_sighdlr, NULL);
2060 3efd8e31 2022-10-23 thomas signal_set(&evsigterm, SIGTERM, gotd_sighdlr, NULL);
2061 3efd8e31 2022-10-23 thomas signal_set(&evsighup, SIGHUP, gotd_sighdlr, NULL);
2062 3efd8e31 2022-10-23 thomas signal_set(&evsigusr1, SIGUSR1, gotd_sighdlr, NULL);
2063 3efd8e31 2022-10-23 thomas signal(SIGPIPE, SIG_IGN);
2065 3efd8e31 2022-10-23 thomas signal_add(&evsigint, NULL);
2066 3efd8e31 2022-10-23 thomas signal_add(&evsigterm, NULL);
2067 3efd8e31 2022-10-23 thomas signal_add(&evsighup, NULL);
2068 3efd8e31 2022-10-23 thomas signal_add(&evsigusr1, NULL);
2070 3efd8e31 2022-10-23 thomas event_set(&gotd.ev, fd, EV_READ | EV_PERSIST, gotd_accept, NULL);
2071 3efd8e31 2022-10-23 thomas if (event_add(&gotd.ev, NULL))
2072 3efd8e31 2022-10-23 thomas fatalx("event add");
2073 3efd8e31 2022-10-23 thomas evtimer_set(&gotd.pause, gotd_accept_paused, NULL);
2075 3efd8e31 2022-10-23 thomas event_dispatch();
2077 3efd8e31 2022-10-23 thomas if (fd != -1)
2078 3efd8e31 2022-10-23 thomas close(fd);
2079 3efd8e31 2022-10-23 thomas if (pack_fds)
2080 3efd8e31 2022-10-23 thomas got_repo_pack_fds_close(pack_fds);
2081 3efd8e31 2022-10-23 thomas free(repo_path);
2082 3efd8e31 2022-10-23 thomas return 0;
