parse_diff_color_slot: drop ofs parameter
[git/git.git] / daemon.c
CommitLineData
979e32fa 1#include "cache.h"
85023577 2#include "pkt-line.h"
77cb17e9 3#include "exec_cmd.h"
5d87dd4f
JS
4#include "run-command.h"
5#include "strbuf.h"
3a3a29c1 6#include "string-list.h"
f8ff0c06 7
695dffe2
JS
8#ifndef HOST_NAME_MAX
9#define HOST_NAME_MAX 256
10#endif
11
2844923d
MD
12#ifdef NO_INITGROUPS
13#define initgroups(x, y) (0) /* nothing */
14#endif
15
9048fe1c 16static int log_syslog;
f8ff0c06 17static int verbose;
1955fabf 18static int reuseaddr;
d5570f4d 19static int informative_errors;
f8ff0c06 20
960deccb 21static const char daemon_usage[] =
1b1dd23f 22"git daemon [--verbose] [--syslog] [--export-all]\n"
62b4698e
ŠN
23" [--timeout=<n>] [--init-timeout=<n>] [--max-connections=<n>]\n"
24" [--strict-paths] [--base-path=<path>] [--base-path-relaxed]\n"
25" [--user-path | --user-path=<path>]\n"
26" [--interpolated-path=<path>]\n"
9cddf56e 27" [--reuseaddr] [--pid-file=<file>]\n"
62b4698e 28" [--(enable|disable|allow-override|forbid-override)=<service>]\n"
93741e4a 29" [--access-hook=<path>]\n"
62b4698e 30" [--inetd | [--listen=<host_or_ipaddr>] [--port=<n>]\n"
9cddf56e 31" [--detach] [--user=<user> [--group=<group>]]\n"
62b4698e 32" [<directory>...]";
4ae95682
PA
33
34/* List of acceptable pathname prefixes */
96f1e58f
DR
35static char **ok_paths;
36static int strict_paths;
4ae95682
PA
37
38/* If this is set, git-daemon-export-ok is not required */
96f1e58f 39static int export_all_trees;
f8ff0c06 40
b21c31c9 41/* Take all paths relative to this one if non-NULL */
96f1e58f 42static char *base_path;
49ba83fb 43static char *interpolated_path;
73a7a656 44static int base_path_relaxed;
49ba83fb
JL
45
46/* Flag indicating client sent extra args. */
47static int saw_extended_args;
b21c31c9 48
603968d2
JH
49/* If defined, ~user notation is allowed and the string is inserted
50 * after ~user/. E.g. a request to git://host/~alice/frotz would
51 * go to /home/alice/pub_git/frotz with --user-path=pub_git.
52 */
96f1e58f 53static const char *user_path;
603968d2 54
960deccb 55/* Timeout, and initial timeout */
96f1e58f
DR
56static unsigned int timeout;
57static unsigned int init_timeout;
f8ff0c06 58
9d7ca667
RS
59static char *hostname;
60static char *canon_hostname;
61static char *ip_address;
62static char *tcp_port;
49ba83fb 63
9048fe1c 64static void logreport(int priority, const char *err, va_list params)
f8ff0c06 65{
9048fe1c 66 if (log_syslog) {
6a992e9e
SB
67 char buf[1024];
68 vsnprintf(buf, sizeof(buf), err, params);
9048fe1c 69 syslog(priority, "%s", buf);
460c2010
JH
70 } else {
71 /*
48cfaea1 72 * Since stderr is set to buffered mode, the
6a992e9e 73 * logging of different processes will not overlap
48cfaea1 74 * unless they overflow the (rather big) buffers.
6a992e9e 75 */
85e72830 76 fprintf(stderr, "[%"PRIuMAX"] ", (uintmax_t)getpid());
6a992e9e
SB
77 vfprintf(stderr, err, params);
78 fputc('\n', stderr);
48cfaea1 79 fflush(stderr);
6a992e9e 80 }
f8ff0c06
PB
81}
82
28bea9e5 83__attribute__((format (printf, 1, 2)))
cdda4745 84static void logerror(const char *err, ...)
f8ff0c06
PB
85{
86 va_list params;
87 va_start(params, err);
9048fe1c 88 logreport(LOG_ERR, err, params);
f8ff0c06
PB
89 va_end(params);
90}
91
28bea9e5 92__attribute__((format (printf, 1, 2)))
cdda4745 93static void loginfo(const char *err, ...)
f8ff0c06
PB
94{
95 va_list params;
96 if (!verbose)
97 return;
98 va_start(params, err);
9048fe1c 99 logreport(LOG_INFO, err, params);
f8ff0c06
PB
100 va_end(params);
101}
a87e8be2 102
ad8b4f56
ML
103static void NORETURN daemon_die(const char *err, va_list params)
104{
105 logreport(LOG_ERR, err, params);
106 exit(1);
107}
108
1c64b48e 109static const char *path_ok(char *directory)
4ae95682 110{
603968d2 111 static char rpath[PATH_MAX];
49ba83fb 112 static char interp_path[PATH_MAX];
1c64b48e 113 const char *path;
49ba83fb
JL
114 char *dir;
115
9d7ca667 116 dir = directory;
d79374c7 117
34b6cb8b 118 if (daemon_avoid_alias(dir)) {
d79374c7
JH
119 logerror("'%s': aliased", dir);
120 return NULL;
121 }
122
603968d2
JH
123 if (*dir == '~') {
124 if (!user_path) {
125 logerror("'%s': User-path not allowed", dir);
126 return NULL;
127 }
128 if (*user_path) {
129 /* Got either "~alice" or "~alice/foo";
130 * rewrite them to "~alice/%s" or
131 * "~alice/%s/foo".
132 */
133 int namlen, restlen = strlen(dir);
134 char *slash = strchr(dir, '/');
135 if (!slash)
136 slash = dir + restlen;
137 namlen = slash - dir;
138 restlen -= namlen;
139 loginfo("userpath <%s>, request <%s>, namlen %d, restlen %d, slash <%s>", user_path, dir, namlen, restlen, slash);
140 snprintf(rpath, PATH_MAX, "%.*s/%s%.*s",
141 namlen, dir, user_path, restlen, slash);
142 dir = rpath;
143 }
144 }
49ba83fb 145 else if (interpolated_path && saw_extended_args) {
9d7ca667 146 struct strbuf expanded_path = STRBUF_INIT;
66dbfd55
GV
147 struct strbuf_expand_dict_entry dict[6];
148
149 dict[0].placeholder = "H"; dict[0].value = hostname;
150 dict[1].placeholder = "CH"; dict[1].value = canon_hostname;
151 dict[2].placeholder = "IP"; dict[2].value = ip_address;
152 dict[3].placeholder = "P"; dict[3].value = tcp_port;
153 dict[4].placeholder = "D"; dict[4].value = directory;
154 dict[5].placeholder = NULL; dict[5].value = NULL;
49ba83fb
JL
155 if (*dir != '/') {
156 /* Allow only absolute */
157 logerror("'%s': Non-absolute path denied (interpolated-path active)", dir);
158 return NULL;
159 }
160
9d7ca667
RS
161 strbuf_expand(&expanded_path, interpolated_path,
162 strbuf_expand_dict_cb, &dict);
163 strlcpy(interp_path, expanded_path.buf, PATH_MAX);
164 strbuf_release(&expanded_path);
49ba83fb
JL
165 loginfo("Interpolated dir '%s'", interp_path);
166
167 dir = interp_path;
168 }
603968d2
JH
169 else if (base_path) {
170 if (*dir != '/') {
171 /* Allow only absolute */
1fda3d55 172 logerror("'%s': Non-absolute path denied (base-path active)", dir);
b21c31c9
PB
173 return NULL;
174 }
49ba83fb
JL
175 snprintf(rpath, PATH_MAX, "%s%s", base_path, dir);
176 dir = rpath;
b21c31c9
PB
177 }
178
a583971f
RS
179 path = enter_repo(dir, strict_paths);
180 if (!path && base_path && base_path_relaxed) {
73a7a656
JA
181 /*
182 * if we fail and base_path_relaxed is enabled, try without
183 * prefixing the base path
184 */
a583971f
RS
185 dir = directory;
186 path = enter_repo(dir, strict_paths);
187 }
3e04c62d 188
4dbd1352 189 if (!path) {
05ac6b34 190 logerror("'%s' does not appear to be a git repository", dir);
4dbd1352 191 return NULL;
4ae95682
PA
192 }
193
194 if ( ok_paths && *ok_paths ) {
ce335fe0 195 char **pp;
4dbd1352 196 int pathlen = strlen(path);
4ae95682 197
ce335fe0 198 /* The validation is done on the paths after enter_repo
a6080a0a 199 * appends optional {.git,.git/.git} and friends, but
d79374c7
JH
200 * it does not use getcwd(). So if your /pub is
201 * a symlink to /mnt/pub, you can whitelist /pub and
202 * do not have to say /mnt/pub.
203 * Do not say /pub/.
ce335fe0 204 */
4ae95682
PA
205 for ( pp = ok_paths ; *pp ; pp++ ) {
206 int len = strlen(*pp);
ce335fe0
JH
207 if (len <= pathlen &&
208 !memcmp(*pp, path, len) &&
209 (path[len] == '\0' ||
210 (!strict_paths && path[len] == '/')))
211 return path;
4ae95682 212 }
4dbd1352
AE
213 }
214 else {
215 /* be backwards compatible */
216 if (!strict_paths)
217 return path;
4ae95682
PA
218 }
219
4dbd1352
AE
220 logerror("'%s': not in whitelist", path);
221 return NULL; /* Fallthrough. Deny by default */
4ae95682 222}
a87e8be2 223
d819e4e6
JH
224typedef int (*daemon_service_fn)(void);
225struct daemon_service {
226 const char *name;
227 const char *config_name;
228 daemon_service_fn fn;
229 int enabled;
230 int overridable;
231};
232
233static struct daemon_service *service_looking_at;
234static int service_enabled;
235
ef90d6d4 236static int git_daemon_config(const char *var, const char *value, void *cb)
d819e4e6 237{
59556548 238 if (starts_with(var, "daemon.") &&
d819e4e6
JH
239 !strcmp(var + 7, service_looking_at->config_name)) {
240 service_enabled = git_config_bool(var, value);
241 return 0;
242 }
243
244 /* we are not interested in parsing any other configuration here */
245 return 0;
246}
247
d5570f4d
JK
248static int daemon_error(const char *dir, const char *msg)
249{
250 if (!informative_errors)
251 msg = "access denied or repository not exported";
252 packet_write(1, "ERR %s: %s", msg, dir);
253 return -1;
254}
255
93741e4a
JH
256static char *access_hook;
257
258static int run_access_hook(struct daemon_service *service, const char *dir, const char *path)
259{
260 struct child_process child;
261 struct strbuf buf = STRBUF_INIT;
262 const char *argv[8];
263 const char **arg = argv;
264 char *eol;
265 int seen_errors = 0;
266
267#define STRARG(x) ((x) ? (x) : "")
268 *arg++ = access_hook;
269 *arg++ = service->name;
270 *arg++ = path;
271 *arg++ = STRARG(hostname);
272 *arg++ = STRARG(canon_hostname);
273 *arg++ = STRARG(ip_address);
274 *arg++ = STRARG(tcp_port);
275 *arg = NULL;
276#undef STRARG
277
278 memset(&child, 0, sizeof(child));
279 child.use_shell = 1;
280 child.argv = argv;
281 child.no_stdin = 1;
282 child.no_stderr = 1;
283 child.out = -1;
284 if (start_command(&child)) {
285 logerror("daemon access hook '%s' failed to start",
286 access_hook);
287 goto error_return;
288 }
289 if (strbuf_read(&buf, child.out, 0) < 0) {
290 logerror("failed to read from pipe to daemon access hook '%s'",
291 access_hook);
292 strbuf_reset(&buf);
293 seen_errors = 1;
294 }
295 if (close(child.out) < 0) {
296 logerror("failed to close pipe to daemon access hook '%s'",
297 access_hook);
298 seen_errors = 1;
299 }
300 if (finish_command(&child))
301 seen_errors = 1;
302
303 if (!seen_errors) {
304 strbuf_release(&buf);
305 return 0;
306 }
307
308error_return:
309 strbuf_ltrim(&buf);
310 if (!buf.len)
311 strbuf_addstr(&buf, "service rejected");
312 eol = strchr(buf.buf, '\n');
313 if (eol)
314 *eol = '\0';
315 errno = EACCES;
316 daemon_error(dir, buf.buf);
317 strbuf_release(&buf);
318 return -1;
319}
320
a47551c3 321static int run_service(char *dir, struct daemon_service *service)
a87e8be2 322{
4dbd1352 323 const char *path;
d819e4e6
JH
324 int enabled = service->enabled;
325
a47551c3 326 loginfo("Request %s for '%s'", service->name, dir);
4dbd1352 327
d819e4e6
JH
328 if (!enabled && !service->overridable) {
329 logerror("'%s': service not enabled.", service->name);
330 errno = EACCES;
d5570f4d 331 return daemon_error(dir, "service not enabled");
d819e4e6 332 }
4ae95682 333
a47551c3 334 if (!(path = path_ok(dir)))
d5570f4d 335 return daemon_error(dir, "no such repository");
47888f0f 336
a87e8be2
LT
337 /*
338 * Security on the cheap.
339 *
a935c397 340 * We want a readable HEAD, usable "objects" directory, and
a87e8be2
LT
341 * a "git-daemon-export-ok" flag that says that the other side
342 * is ok with us doing this.
4dbd1352
AE
343 *
344 * path_ok() uses enter_repo() and does whitelist checking.
345 * We only need to make sure the repository is exported.
a87e8be2 346 */
4dbd1352 347
3e04c62d 348 if (!export_all_trees && access("git-daemon-export-ok", F_OK)) {
4dbd1352 349 logerror("'%s': repository not exported.", path);
3e04c62d 350 errno = EACCES;
d5570f4d 351 return daemon_error(dir, "repository not exported");
3e04c62d
PA
352 }
353
d819e4e6
JH
354 if (service->overridable) {
355 service_looking_at = service;
356 service_enabled = -1;
ef90d6d4 357 git_config(git_daemon_config, NULL);
d819e4e6
JH
358 if (0 <= service_enabled)
359 enabled = service_enabled;
360 }
361 if (!enabled) {
362 logerror("'%s': service not enabled for '%s'",
363 service->name, path);
364 errno = EACCES;
d5570f4d 365 return daemon_error(dir, "service not enabled");
d819e4e6
JH
366 }
367
93741e4a
JH
368 /*
369 * Optionally, a hook can choose to deny access to the
370 * repository depending on the phase of the moon.
371 */
372 if (access_hook && run_access_hook(service, dir, path))
373 return -1;
374
02d57da4
LT
375 /*
376 * We'll ignore SIGTERM from now on, we have a
377 * good client.
378 */
379 signal(SIGTERM, SIG_IGN);
380
d819e4e6
JH
381 return service->fn();
382}
383
5d87dd4f
JS
384static void copy_to_log(int fd)
385{
386 struct strbuf line = STRBUF_INIT;
387 FILE *fp;
388
389 fp = fdopen(fd, "r");
390 if (fp == NULL) {
391 logerror("fdopen of error channel failed");
392 close(fd);
393 return;
394 }
395
396 while (strbuf_getline(&line, fp, '\n') != EOF) {
397 logerror("%s", line.buf);
398 strbuf_setlen(&line, 0);
399 }
400
401 strbuf_release(&line);
402 fclose(fp);
403}
404
405static int run_service_command(const char **argv)
406{
407 struct child_process cld;
408
409 memset(&cld, 0, sizeof(cld));
410 cld.argv = argv;
411 cld.git_cmd = 1;
412 cld.err = -1;
413 if (start_command(&cld))
414 return -1;
415
416 close(0);
417 close(1);
418
419 copy_to_log(cld.err);
420
421 return finish_command(&cld);
422}
423
d819e4e6
JH
424static int upload_pack(void)
425{
426 /* Timeout as string */
427 char timeout_buf[64];
66dbfd55
GV
428 const char *argv[] = { "upload-pack", "--strict", NULL, ".", NULL };
429
430 argv[2] = timeout_buf;
d819e4e6 431
960deccb 432 snprintf(timeout_buf, sizeof timeout_buf, "--timeout=%u", timeout);
5d87dd4f 433 return run_service_command(argv);
a87e8be2
LT
434}
435
39345a21
FBH
436static int upload_archive(void)
437{
5d87dd4f
JS
438 static const char *argv[] = { "upload-archive", ".", NULL };
439 return run_service_command(argv);
39345a21
FBH
440}
441
4b3b1e1e
LT
442static int receive_pack(void)
443{
5d87dd4f
JS
444 static const char *argv[] = { "receive-pack", ".", NULL };
445 return run_service_command(argv);
4b3b1e1e
LT
446}
447
d819e4e6 448static struct daemon_service daemon_service[] = {
39345a21 449 { "upload-archive", "uploadarch", upload_archive, 0, 1 },
d819e4e6 450 { "upload-pack", "uploadpack", upload_pack, 1, 1 },
4b3b1e1e 451 { "receive-pack", "receivepack", receive_pack, 0, 1 },
d819e4e6
JH
452};
453
f3fa1838
JH
454static void enable_service(const char *name, int ena)
455{
d819e4e6
JH
456 int i;
457 for (i = 0; i < ARRAY_SIZE(daemon_service); i++) {
458 if (!strcmp(daemon_service[i].name, name)) {
459 daemon_service[i].enabled = ena;
460 return;
461 }
462 }
463 die("No such service %s", name);
464}
465
f3fa1838
JH
466static void make_service_overridable(const char *name, int ena)
467{
d819e4e6
JH
468 int i;
469 for (i = 0; i < ARRAY_SIZE(daemon_service); i++) {
470 if (!strcmp(daemon_service[i].name, name)) {
471 daemon_service[i].overridable = ena;
472 return;
473 }
474 }
475 die("No such service %s", name);
476}
477
e8dbd76d
IL
478static void parse_host_and_port(char *hostport, char **host,
479 char **port)
480{
481 if (*hostport == '[') {
482 char *end;
483
484 end = strchr(hostport, ']');
485 if (!end)
9517e6b8 486 die("Invalid request ('[' without ']')");
e8dbd76d
IL
487 *end = '\0';
488 *host = hostport + 1;
489 if (!end[1])
490 *port = NULL;
491 else if (end[1] == ':')
492 *port = end + 2;
493 else
494 die("Garbage after end of host part");
495 } else {
496 *host = hostport;
497 *port = strrchr(hostport, ':');
498 if (*port) {
e9bd3235 499 **port = '\0';
e8dbd76d
IL
500 ++*port;
501 }
502 }
503}
504
eb30aed7 505/*
73bb33a9 506 * Read the host as supplied by the client connection.
eb30aed7 507 */
73bb33a9 508static void parse_host_arg(char *extra_args, int buflen)
49ba83fb
JL
509{
510 char *val;
511 int vallen;
512 char *end = extra_args + buflen;
513
73bb33a9 514 if (extra_args < end && *extra_args) {
49ba83fb
JL
515 saw_extended_args = 1;
516 if (strncasecmp("host=", extra_args, 5) == 0) {
517 val = extra_args + 5;
518 vallen = strlen(val) + 1;
519 if (*val) {
eb30aed7 520 /* Split <host>:<port> at colon. */
e8dbd76d
IL
521 char *host;
522 char *port;
523 parse_host_and_port(val, &host, &port);
dd467629 524 if (port) {
9d7ca667
RS
525 free(tcp_port);
526 tcp_port = xstrdup(port);
dd467629 527 }
9d7ca667 528 free(hostname);
6720e95b 529 hostname = xstrdup_tolower(host);
49ba83fb 530 }
eb30aed7 531
49ba83fb
JL
532 /* On to the next one */
533 extra_args = val + vallen;
534 }
73bb33a9
SP
535 if (extra_args < end && *extra_args)
536 die("Invalid request");
49ba83fb 537 }
dd467629 538
dd467629
JL
539 /*
540 * Locate canonical hostname and its IP address.
541 */
6720e95b 542 if (hostname) {
dd467629 543#ifndef NO_IPV6
dd467629 544 struct addrinfo hints;
3e8a00ae 545 struct addrinfo *ai;
dd467629
JL
546 int gai;
547 static char addrbuf[HOST_NAME_MAX + 1];
548
549 memset(&hints, 0, sizeof(hints));
550 hints.ai_flags = AI_CANONNAME;
551
2af202be 552 gai = getaddrinfo(hostname, NULL, &hints, &ai);
dd467629 553 if (!gai) {
3e8a00ae
BK
554 struct sockaddr_in *sin_addr = (void *)ai->ai_addr;
555
556 inet_ntop(AF_INET, &sin_addr->sin_addr,
557 addrbuf, sizeof(addrbuf));
558 free(ip_address);
559 ip_address = xstrdup(addrbuf);
560
561 free(canon_hostname);
562 canon_hostname = xstrdup(ai->ai_canonname ?
563 ai->ai_canonname : ip_address);
564
565 freeaddrinfo(ai);
dd467629 566 }
dd467629 567#else
dd467629
JL
568 struct hostent *hent;
569 struct sockaddr_in sa;
570 char **ap;
571 static char addrbuf[HOST_NAME_MAX + 1];
572
9d7ca667 573 hent = gethostbyname(hostname);
dd467629
JL
574
575 ap = hent->h_addr_list;
576 memset(&sa, 0, sizeof sa);
577 sa.sin_family = hent->h_addrtype;
578 sa.sin_port = htons(0);
579 memcpy(&sa.sin_addr, *ap, hent->h_length);
580
581 inet_ntop(hent->h_addrtype, &sa.sin_addr,
582 addrbuf, sizeof(addrbuf));
eb30aed7 583
9d7ca667
RS
584 free(canon_hostname);
585 canon_hostname = xstrdup(hent->h_name);
586 free(ip_address);
587 ip_address = xstrdup(addrbuf);
dd467629 588#endif
6720e95b 589 }
dd467629
JL
590}
591
592
f9c87be6 593static int execute(void)
a87e8be2 594{
74543a04 595 char *line = packet_buffer;
d819e4e6 596 int pktlen, len, i;
f9c87be6 597 char *addr = getenv("REMOTE_ADDR"), *port = getenv("REMOTE_PORT");
7d80694a 598
f9c87be6
EFL
599 if (addr)
600 loginfo("Connection from %s:%s", addr, port);
5b276ee4 601
960deccb 602 alarm(init_timeout ? init_timeout : timeout);
4981fe75 603 pktlen = packet_read(0, NULL, NULL, packet_buffer, sizeof(packet_buffer), 0);
960deccb 604 alarm(0);
7d80694a 605
5ad312be
JL
606 len = strlen(line);
607 if (pktlen != len)
608 loginfo("Extended attributes (%d bytes) exist <%.*s>",
609 (int) pktlen - len,
610 (int) pktlen - len, line + len + 1);
83543a24 611 if (len && line[len-1] == '\n') {
7d80694a 612 line[--len] = 0;
83543a24
JH
613 pktlen--;
614 }
7d80694a 615
9d7ca667
RS
616 free(hostname);
617 free(canon_hostname);
618 free(ip_address);
619 free(tcp_port);
a47551c3 620 hostname = canon_hostname = ip_address = tcp_port = NULL;
eb30aed7 621
d433ed0b 622 if (len != pktlen)
73bb33a9 623 parse_host_arg(line + len + 1, pktlen - len - 1);
49ba83fb 624
d819e4e6
JH
625 for (i = 0; i < ARRAY_SIZE(daemon_service); i++) {
626 struct daemon_service *s = &(daemon_service[i]);
627 int namelen = strlen(s->name);
59556548 628 if (starts_with(line, "git-") &&
d819e4e6 629 !strncmp(s->name, line + 4, namelen) &&
49ba83fb 630 line[namelen + 4] == ' ') {
eb30aed7
JL
631 /*
632 * Note: The directory here is probably context sensitive,
633 * and might depend on the actual service being performed.
634 */
a47551c3 635 return run_service(line + namelen + 5, s);
49ba83fb 636 }
d819e4e6 637 }
a87e8be2 638
f8ff0c06 639 logerror("Protocol error: '%s'", line);
a87e8be2
LT
640 return -1;
641}
642
15515b73
EFL
643static int addrcmp(const struct sockaddr_storage *s1,
644 const struct sockaddr_storage *s2)
645{
3aff874a
BC
646 const struct sockaddr *sa1 = (const struct sockaddr*) s1;
647 const struct sockaddr *sa2 = (const struct sockaddr*) s2;
648
649 if (sa1->sa_family != sa2->sa_family)
650 return sa1->sa_family - sa2->sa_family;
651 if (sa1->sa_family == AF_INET)
15515b73
EFL
652 return memcmp(&((struct sockaddr_in *)s1)->sin_addr,
653 &((struct sockaddr_in *)s2)->sin_addr,
654 sizeof(struct in_addr));
655#ifndef NO_IPV6
3aff874a 656 if (sa1->sa_family == AF_INET6)
15515b73
EFL
657 return memcmp(&((struct sockaddr_in6 *)s1)->sin6_addr,
658 &((struct sockaddr_in6 *)s2)->sin6_addr,
659 sizeof(struct in6_addr));
660#endif
661 return 0;
662}
663
3bd62c21 664static int max_connections = 32;
66e631de 665
3bd62c21 666static unsigned int live_children;
66e631de 667
4d8fa916 668static struct child {
3bd62c21 669 struct child *next;
30e15602 670 struct child_process cld;
df076bdb 671 struct sockaddr_storage address;
3bd62c21 672} *firstborn;
66e631de 673
c295cf06 674static void add_child(struct child_process *cld, struct sockaddr *addr, socklen_t addrlen)
66e631de 675{
460c2010
JH
676 struct child *newborn, **cradle;
677
460c2010
JH
678 newborn = xcalloc(1, sizeof(*newborn));
679 live_children++;
30e15602 680 memcpy(&newborn->cld, cld, sizeof(*cld));
460c2010
JH
681 memcpy(&newborn->address, addr, addrlen);
682 for (cradle = &firstborn; *cradle; cradle = &(*cradle)->next)
15515b73 683 if (!addrcmp(&(*cradle)->address, &newborn->address))
460c2010
JH
684 break;
685 newborn->next = *cradle;
686 *cradle = newborn;
66e631de
LT
687}
688
66e631de
LT
689/*
690 * This gets called if the number of connections grows
691 * past "max_connections".
692 *
3bd62c21 693 * We kill the newest connection from a duplicate IP.
66e631de 694 */
3bd62c21 695static void kill_some_child(void)
66e631de 696{
460c2010 697 const struct child *blanket, *next;
66e631de 698
460c2010
JH
699 if (!(blanket = firstborn))
700 return;
695605b5 701
460c2010 702 for (; (next = blanket->next); blanket = next)
15515b73 703 if (!addrcmp(&blanket->address, &next->address)) {
30e15602 704 kill(blanket->cld.pid, SIGTERM);
460c2010
JH
705 break;
706 }
a5a9126b
JS
707}
708
3bd62c21 709static void check_dead_children(void)
a87e8be2 710{
3bd62c21
SB
711 int status;
712 pid_t pid;
02d57da4 713
30e15602
EFL
714 struct child **cradle, *blanket;
715 for (cradle = &firstborn; (blanket = *cradle);)
716 if ((pid = waitpid(blanket->cld.pid, &status, WNOHANG)) > 1) {
717 const char *dead = "";
718 if (status)
719 dead = " (with error)";
720 loginfo("[%"PRIuMAX"] Disconnected%s", (uintmax_t)pid, dead);
721
722 /* remove the child */
723 *cradle = blanket->next;
724 live_children--;
725 free(blanket);
726 } else
727 cradle = &blanket->next;
02d57da4
LT
728}
729
30e15602 730static char **cld_argv;
c295cf06 731static void handle(int incoming, struct sockaddr *addr, socklen_t addrlen)
02d57da4 732{
c2e86add 733 struct child_process cld = { NULL };
f9c87be6
EFL
734 char addrbuf[300] = "REMOTE_ADDR=", portbuf[300];
735 char *env[] = { addrbuf, portbuf, NULL };
02d57da4 736
3bd62c21
SB
737 if (max_connections && live_children >= max_connections) {
738 kill_some_child();
460c2010 739 sleep(1); /* give it some time to die */
3bd62c21
SB
740 check_dead_children();
741 if (live_children >= max_connections) {
742 close(incoming);
743 logerror("Too many children, dropping connection");
744 return;
745 }
746 }
02d57da4 747
f9c87be6
EFL
748 if (addr->sa_family == AF_INET) {
749 struct sockaddr_in *sin_addr = (void *) addr;
750 inet_ntop(addr->sa_family, &sin_addr->sin_addr, addrbuf + 12,
751 sizeof(addrbuf) - 12);
752 snprintf(portbuf, sizeof(portbuf), "REMOTE_PORT=%d",
753 ntohs(sin_addr->sin_port));
754#ifndef NO_IPV6
5d9cfa29 755 } else if (addr->sa_family == AF_INET6) {
f9c87be6
EFL
756 struct sockaddr_in6 *sin6_addr = (void *) addr;
757
758 char *buf = addrbuf + 12;
759 *buf++ = '['; *buf = '\0'; /* stpcpy() is cool */
760 inet_ntop(AF_INET6, &sin6_addr->sin6_addr, buf,
761 sizeof(addrbuf) - 13);
762 strcat(buf, "]");
763
764 snprintf(portbuf, sizeof(portbuf), "REMOTE_PORT=%d",
765 ntohs(sin6_addr->sin6_port));
766#endif
767 }
768
769 cld.env = (const char **)env;
30e15602
EFL
770 cld.argv = (const char **)cld_argv;
771 cld.in = incoming;
772 cld.out = dup(incoming);
a87e8be2 773
30e15602
EFL
774 if (start_command(&cld))
775 logerror("unable to fork");
776 else
777 add_child(&cld, addr, addrlen);
a87e8be2 778 close(incoming);
a87e8be2
LT
779}
780
eaa94919
LT
781static void child_handler(int signo)
782{
460c2010
JH
783 /*
784 * Otherwise empty handler because systemcalls will get interrupted
695605b5
SB
785 * upon signal receipt
786 * SysV needs the handler to be rearmed
787 */
bd7b371e 788 signal(SIGCHLD, child_handler);
eaa94919
LT
789}
790
1955fabf
MW
791static int set_reuse_addr(int sockfd)
792{
793 int on = 1;
794
795 if (!reuseaddr)
796 return 0;
797 return setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR,
798 &on, sizeof(on));
799}
800
2caa3215
AS
801struct socketlist {
802 int *list;
803 size_t nr;
804 size_t alloc;
805};
806
089d82e8
NTND
807static const char *ip2str(int family, struct sockaddr *sin, socklen_t len)
808{
809#ifdef NO_IPV6
810 static char ip[INET_ADDRSTRLEN];
811#else
812 static char ip[INET6_ADDRSTRLEN];
813#endif
814
815 switch (family) {
816#ifndef NO_IPV6
817 case AF_INET6:
818 inet_ntop(family, &((struct sockaddr_in6*)sin)->sin6_addr, ip, len);
819 break;
820#endif
821 case AF_INET:
822 inet_ntop(family, &((struct sockaddr_in*)sin)->sin_addr, ip, len);
823 break;
824 default:
825 strcpy(ip, "<unknown>");
826 }
827 return ip;
828}
829
6573faff
PA
830#ifndef NO_IPV6
831
2caa3215 832static int setup_named_sock(char *listen_addr, int listen_port, struct socketlist *socklist)
a87e8be2 833{
2caa3215 834 int socknum = 0;
df076bdb 835 int maxfd = -1;
df076bdb 836 char pbuf[NI_MAXSERV];
6573faff
PA
837 struct addrinfo hints, *ai0, *ai;
838 int gai;
20276889 839 long flags;
df076bdb 840
dd467629 841 sprintf(pbuf, "%d", listen_port);
df076bdb
YH
842 memset(&hints, 0, sizeof(hints));
843 hints.ai_family = AF_UNSPEC;
844 hints.ai_socktype = SOCK_STREAM;
845 hints.ai_protocol = IPPROTO_TCP;
846 hints.ai_flags = AI_PASSIVE;
847
dd467629 848 gai = getaddrinfo(listen_addr, pbuf, &hints, &ai0);
2caa3215
AS
849 if (gai) {
850 logerror("getaddrinfo() for %s failed: %s", listen_addr, gai_strerror(gai));
851 return 0;
852 }
df076bdb 853
df076bdb
YH
854 for (ai = ai0; ai; ai = ai->ai_next) {
855 int sockfd;
df076bdb
YH
856
857 sockfd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
858 if (sockfd < 0)
859 continue;
860 if (sockfd >= FD_SETSIZE) {
df0daf8a 861 logerror("Socket descriptor too large");
df076bdb
YH
862 close(sockfd);
863 continue;
864 }
865
866#ifdef IPV6_V6ONLY
867 if (ai->ai_family == AF_INET6) {
868 int on = 1;
869 setsockopt(sockfd, IPPROTO_IPV6, IPV6_V6ONLY,
870 &on, sizeof(on));
871 /* Note: error is not fatal */
872 }
873#endif
874
1955fabf 875 if (set_reuse_addr(sockfd)) {
089d82e8 876 logerror("Could not set SO_REUSEADDR: %s", strerror(errno));
1955fabf 877 close(sockfd);
0032d548 878 continue;
1955fabf
MW
879 }
880
df076bdb 881 if (bind(sockfd, ai->ai_addr, ai->ai_addrlen) < 0) {
089d82e8
NTND
882 logerror("Could not bind to %s: %s",
883 ip2str(ai->ai_family, ai->ai_addr, ai->ai_addrlen),
884 strerror(errno));
df076bdb
YH
885 close(sockfd);
886 continue; /* not fatal */
887 }
888 if (listen(sockfd, 5) < 0) {
089d82e8
NTND
889 logerror("Could not listen to %s: %s",
890 ip2str(ai->ai_family, ai->ai_addr, ai->ai_addrlen),
891 strerror(errno));
df076bdb
YH
892 close(sockfd);
893 continue; /* not fatal */
894 }
895
20276889
AJ
896 flags = fcntl(sockfd, F_GETFD, 0);
897 if (flags >= 0)
898 fcntl(sockfd, F_SETFD, flags | FD_CLOEXEC);
899
2caa3215
AS
900 ALLOC_GROW(socklist->list, socklist->nr + 1, socklist->alloc);
901 socklist->list[socklist->nr++] = sockfd;
902 socknum++;
df076bdb 903
df076bdb
YH
904 if (maxfd < sockfd)
905 maxfd = sockfd;
906 }
907
908 freeaddrinfo(ai0);
909
6573faff
PA
910 return socknum;
911}
912
913#else /* NO_IPV6 */
914
2caa3215 915static int setup_named_sock(char *listen_addr, int listen_port, struct socketlist *socklist)
6573faff
PA
916{
917 struct sockaddr_in sin;
918 int sockfd;
20276889 919 long flags;
6573faff 920
dd467629
JL
921 memset(&sin, 0, sizeof sin);
922 sin.sin_family = AF_INET;
923 sin.sin_port = htons(listen_port);
924
925 if (listen_addr) {
926 /* Well, host better be an IP address here. */
927 if (inet_pton(AF_INET, listen_addr, &sin.sin_addr.s_addr) <= 0)
928 return 0;
929 } else {
930 sin.sin_addr.s_addr = htonl(INADDR_ANY);
931 }
932
6573faff
PA
933 sockfd = socket(AF_INET, SOCK_STREAM, 0);
934 if (sockfd < 0)
935 return 0;
936
1955fabf 937 if (set_reuse_addr(sockfd)) {
089d82e8 938 logerror("Could not set SO_REUSEADDR: %s", strerror(errno));
1955fabf
MW
939 close(sockfd);
940 return 0;
941 }
942
6573faff 943 if ( bind(sockfd, (struct sockaddr *)&sin, sizeof sin) < 0 ) {
089d82e8
NTND
944 logerror("Could not listen to %s: %s",
945 ip2str(AF_INET, (struct sockaddr *)&sin, sizeof(sin)),
946 strerror(errno));
6573faff
PA
947 close(sockfd);
948 return 0;
949 }
a87e8be2 950
f35230fb 951 if (listen(sockfd, 5) < 0) {
089d82e8
NTND
952 logerror("Could not listen to %s: %s",
953 ip2str(AF_INET, (struct sockaddr *)&sin, sizeof(sin)),
954 strerror(errno));
f35230fb
PS
955 close(sockfd);
956 return 0;
957 }
958
20276889
AJ
959 flags = fcntl(sockfd, F_GETFD, 0);
960 if (flags >= 0)
961 fcntl(sockfd, F_SETFD, flags | FD_CLOEXEC);
962
2caa3215
AS
963 ALLOC_GROW(socklist->list, socklist->nr + 1, socklist->alloc);
964 socklist->list[socklist->nr++] = sockfd;
f35230fb 965 return 1;
6573faff
PA
966}
967
968#endif
969
3a3a29c1 970static void socksetup(struct string_list *listen_addr, int listen_port, struct socketlist *socklist)
2caa3215 971{
3a3a29c1
AS
972 if (!listen_addr->nr)
973 setup_named_sock(NULL, listen_port, socklist);
974 else {
975 int i, socknum;
976 for (i = 0; i < listen_addr->nr; i++) {
977 socknum = setup_named_sock(listen_addr->items[i].string,
978 listen_port, socklist);
979
980 if (socknum == 0)
981 logerror("unable to allocate any listen sockets for host %s on port %u",
982 listen_addr->items[i].string, listen_port);
983 }
984 }
2caa3215
AS
985}
986
987static int service_loop(struct socketlist *socklist)
6573faff
PA
988{
989 struct pollfd *pfd;
990 int i;
991
2caa3215 992 pfd = xcalloc(socklist->nr, sizeof(struct pollfd));
6573faff 993
2caa3215
AS
994 for (i = 0; i < socklist->nr; i++) {
995 pfd[i].fd = socklist->list[i];
6573faff
PA
996 pfd[i].events = POLLIN;
997 }
9220282a
PA
998
999 signal(SIGCHLD, child_handler);
a87e8be2
LT
1000
1001 for (;;) {
df076bdb 1002 int i;
6573faff 1003
695605b5
SB
1004 check_dead_children();
1005
2caa3215 1006 if (poll(pfd, socklist->nr, -1) < 0) {
1eef0b33 1007 if (errno != EINTR) {
df0daf8a 1008 logerror("Poll failed, resuming: %s",
1eef0b33
JH
1009 strerror(errno));
1010 sleep(1);
1011 }
df076bdb
YH
1012 continue;
1013 }
1014
2caa3215 1015 for (i = 0; i < socklist->nr; i++) {
6573faff 1016 if (pfd[i].revents & POLLIN) {
f9c87be6
EFL
1017 union {
1018 struct sockaddr sa;
1019 struct sockaddr_in sai;
1020#ifndef NO_IPV6
1021 struct sockaddr_in6 sai6;
1022#endif
1023 } ss;
c295cf06 1024 socklen_t sslen = sizeof(ss);
f9c87be6 1025 int incoming = accept(pfd[i].fd, &ss.sa, &sslen);
df076bdb
YH
1026 if (incoming < 0) {
1027 switch (errno) {
1028 case EAGAIN:
1029 case EINTR:
1030 case ECONNABORTED:
1031 continue;
1032 default:
d824cbba 1033 die_errno("accept returned");
df076bdb
YH
1034 }
1035 }
f9c87be6 1036 handle(incoming, &ss.sa, sslen);
a87e8be2
LT
1037 }
1038 }
a87e8be2
LT
1039 }
1040}
1041
a666b472
EFL
1042#ifdef NO_POSIX_GOODIES
1043
1044struct credentials;
1045
1046static void drop_privileges(struct credentials *cred)
1047{
1048 /* nothing */
1049}
1050
a666b472
EFL
1051static struct credentials *prepare_credentials(const char *user_name,
1052 const char *group_name)
1053{
1054 die("--user not supported on this platform");
1055}
1056
1057#else
1058
1059struct credentials {
1060 struct passwd *pass;
1061 gid_t gid;
1062};
1063
1064static void drop_privileges(struct credentials *cred)
1065{
1066 if (cred && (initgroups(cred->pass->pw_name, cred->gid) ||
1067 setgid (cred->gid) || setuid(cred->pass->pw_uid)))
1068 die("cannot drop privileges");
1069}
1070
1071static struct credentials *prepare_credentials(const char *user_name,
1072 const char *group_name)
1073{
1074 static struct credentials c;
1075
1076 c.pass = getpwnam(user_name);
1077 if (!c.pass)
1078 die("user not found - %s", user_name);
1079
1080 if (!group_name)
1081 c.gid = c.pass->pw_gid;
1082 else {
1083 struct group *group = getgrnam(group_name);
1084 if (!group)
1085 die("group not found - %s", group_name);
1086
1087 c.gid = group->gr_gid;
1088 }
1089
1090 return &c;
1091}
a666b472 1092#endif
a5262768 1093
45ed5d7f
ML
1094static void store_pid(const char *path)
1095{
1096 FILE *f = fopen(path, "w");
1097 if (!f)
d824cbba 1098 die_errno("cannot open pid file '%s'", path);
85e72830 1099 if (fprintf(f, "%"PRIuMAX"\n", (uintmax_t) getpid()) < 0 || fclose(f) != 0)
d824cbba 1100 die_errno("failed to write pid file '%s'", path);
45ed5d7f
ML
1101}
1102
a666b472
EFL
1103static int serve(struct string_list *listen_addr, int listen_port,
1104 struct credentials *cred)
6573faff 1105{
2caa3215 1106 struct socketlist socklist = { NULL, 0, 0 };
4ae22d96 1107
2caa3215
AS
1108 socksetup(listen_addr, listen_port, &socklist);
1109 if (socklist.nr == 0)
3a3a29c1
AS
1110 die("unable to allocate any listen sockets on port %u",
1111 listen_port);
4ae22d96 1112
a666b472 1113 drop_privileges(cred);
678dac6b 1114
f6a34cfb
CB
1115 loginfo("Ready to rumble");
1116
2caa3215 1117 return service_loop(&socklist);
4ae22d96 1118}
6573faff 1119
a87e8be2
LT
1120int main(int argc, char **argv)
1121{
dd467629 1122 int listen_port = 0;
3a3a29c1 1123 struct string_list listen_addr = STRING_LIST_INIT_NODUP;
30e15602 1124 int serve_mode = 0, inetd_mode = 0;
678dac6b 1125 const char *pid_file = NULL, *user_name = NULL, *group_name = NULL;
a5262768 1126 int detach = 0;
a666b472 1127 struct credentials *cred = NULL;
a87e8be2
LT
1128 int i;
1129
5e9637c6
ÆAB
1130 git_setup_gettext();
1131
2fb3f6db
SP
1132 git_extract_argv0_path(argv[0]);
1133
a87e8be2
LT
1134 for (i = 1; i < argc; i++) {
1135 char *arg = argv[i];
1136
59556548 1137 if (starts_with(arg, "--listen=")) {
3a3a29c1 1138 string_list_append(&listen_addr, xstrdup_tolower(arg + 9));
6720e95b 1139 continue;
dd467629 1140 }
59556548 1141 if (starts_with(arg, "--port=")) {
a87e8be2
LT
1142 char *end;
1143 unsigned long n;
1144 n = strtoul(arg+7, &end, 0);
1145 if (arg[7] && !*end) {
dd467629 1146 listen_port = n;
a87e8be2
LT
1147 continue;
1148 }
1149 }
30e15602
EFL
1150 if (!strcmp(arg, "--serve")) {
1151 serve_mode = 1;
1152 continue;
1153 }
e64e1b79
LT
1154 if (!strcmp(arg, "--inetd")) {
1155 inetd_mode = 1;
a8883288 1156 log_syslog = 1;
e64e1b79
LT
1157 continue;
1158 }
f8ff0c06
PB
1159 if (!strcmp(arg, "--verbose")) {
1160 verbose = 1;
1161 continue;
1162 }
9048fe1c
PB
1163 if (!strcmp(arg, "--syslog")) {
1164 log_syslog = 1;
9048fe1c
PB
1165 continue;
1166 }
4ae95682
PA
1167 if (!strcmp(arg, "--export-all")) {
1168 export_all_trees = 1;
1169 continue;
1170 }
59556548 1171 if (starts_with(arg, "--access-hook=")) {
93741e4a
JH
1172 access_hook = arg + 14;
1173 continue;
1174 }
59556548 1175 if (starts_with(arg, "--timeout=")) {
960deccb 1176 timeout = atoi(arg+10);
a8883288 1177 continue;
960deccb 1178 }
59556548 1179 if (starts_with(arg, "--init-timeout=")) {
960deccb 1180 init_timeout = atoi(arg+15);
a8883288 1181 continue;
960deccb 1182 }
59556548 1183 if (starts_with(arg, "--max-connections=")) {
3bd62c21
SB
1184 max_connections = atoi(arg+18);
1185 if (max_connections < 0)
1186 max_connections = 0; /* unlimited */
1187 continue;
1188 }
4dbd1352
AE
1189 if (!strcmp(arg, "--strict-paths")) {
1190 strict_paths = 1;
1191 continue;
1192 }
59556548 1193 if (starts_with(arg, "--base-path=")) {
b21c31c9
PB
1194 base_path = arg+12;
1195 continue;
1196 }
73a7a656
JA
1197 if (!strcmp(arg, "--base-path-relaxed")) {
1198 base_path_relaxed = 1;
1199 continue;
1200 }
59556548 1201 if (starts_with(arg, "--interpolated-path=")) {
49ba83fb
JL
1202 interpolated_path = arg+20;
1203 continue;
1204 }
1955fabf
MW
1205 if (!strcmp(arg, "--reuseaddr")) {
1206 reuseaddr = 1;
1207 continue;
1208 }
603968d2
JH
1209 if (!strcmp(arg, "--user-path")) {
1210 user_path = "";
1211 continue;
1212 }
59556548 1213 if (starts_with(arg, "--user-path=")) {
603968d2
JH
1214 user_path = arg + 12;
1215 continue;
1216 }
59556548 1217 if (starts_with(arg, "--pid-file=")) {
45ed5d7f
ML
1218 pid_file = arg + 11;
1219 continue;
1220 }
a5262768
ML
1221 if (!strcmp(arg, "--detach")) {
1222 detach = 1;
1223 log_syslog = 1;
1224 continue;
1225 }
59556548 1226 if (starts_with(arg, "--user=")) {
678dac6b
TS
1227 user_name = arg + 7;
1228 continue;
1229 }
59556548 1230 if (starts_with(arg, "--group=")) {
678dac6b
TS
1231 group_name = arg + 8;
1232 continue;
1233 }
59556548 1234 if (starts_with(arg, "--enable=")) {
d819e4e6
JH
1235 enable_service(arg + 9, 1);
1236 continue;
1237 }
59556548 1238 if (starts_with(arg, "--disable=")) {
d819e4e6
JH
1239 enable_service(arg + 10, 0);
1240 continue;
1241 }
59556548 1242 if (starts_with(arg, "--allow-override=")) {
74c0cc21 1243 make_service_overridable(arg + 17, 1);
d819e4e6
JH
1244 continue;
1245 }
59556548 1246 if (starts_with(arg, "--forbid-override=")) {
74c0cc21 1247 make_service_overridable(arg + 18, 0);
d819e4e6
JH
1248 continue;
1249 }
82246b76 1250 if (!strcmp(arg, "--informative-errors")) {
d5570f4d
JK
1251 informative_errors = 1;
1252 continue;
1253 }
82246b76 1254 if (!strcmp(arg, "--no-informative-errors")) {
d5570f4d
JK
1255 informative_errors = 0;
1256 continue;
1257 }
4ae95682
PA
1258 if (!strcmp(arg, "--")) {
1259 ok_paths = &argv[i+1];
1260 break;
1261 } else if (arg[0] != '-') {
1262 ok_paths = &argv[i];
1263 break;
1264 }
e64e1b79 1265
a87e8be2
LT
1266 usage(daemon_usage);
1267 }
1268
22665bba 1269 if (log_syslog) {
6a992e9e 1270 openlog("git-daemon", LOG_PID, LOG_DAEMON);
22665bba 1271 set_die_routine(daemon_die);
460c2010 1272 } else
48196afd 1273 /* avoid splitting a message in the middle */
48cfaea1 1274 setvbuf(stderr, NULL, _IOFBF, 4096);
22665bba 1275
9cddf56e
EFL
1276 if (inetd_mode && (detach || group_name || user_name))
1277 die("--detach, --user and --group are incompatible with --inetd");
678dac6b 1278
3a3a29c1 1279 if (inetd_mode && (listen_port || (listen_addr.nr > 0)))
dd467629
JL
1280 die("--listen= and --port= are incompatible with --inetd");
1281 else if (listen_port == 0)
1282 listen_port = DEFAULT_GIT_PORT;
1283
678dac6b
TS
1284 if (group_name && !user_name)
1285 die("--group supplied without --user");
1286
a666b472
EFL
1287 if (user_name)
1288 cred = prepare_credentials(user_name, group_name);
678dac6b 1289
ad8b4f56
ML
1290 if (strict_paths && (!ok_paths || !*ok_paths))
1291 die("option --strict-paths requires a whitelist");
1292
90b4a71c
JH
1293 if (base_path && !is_directory(base_path))
1294 die("base-path '%s' does not exist or is not a directory",
1295 base_path);
20632071 1296
7c3693f1 1297 if (inetd_mode) {
30e15602
EFL
1298 if (!freopen("/dev/null", "w", stderr))
1299 die_errno("failed to redirect stderr to /dev/null");
1300 }
1301
f9c87be6
EFL
1302 if (inetd_mode || serve_mode)
1303 return execute();
bce8230d 1304
de0957ce
NTND
1305 if (detach) {
1306 if (daemonize())
1307 die("--detach not supported on this platform");
1308 } else
a5262768 1309 sanitize_stdfds();
258e93a1 1310
45ed5d7f
ML
1311 if (pid_file)
1312 store_pid(pid_file);
1313
30e15602
EFL
1314 /* prepare argv for serving-processes */
1315 cld_argv = xmalloc(sizeof (char *) * (argc + 2));
081f84ee
JN
1316 cld_argv[0] = argv[0]; /* git-daemon */
1317 cld_argv[1] = "--serve";
1318 for (i = 1; i < argc; ++i)
1319 cld_argv[i+1] = argv[i];
30e15602
EFL
1320 cld_argv[argc+1] = NULL;
1321
a666b472 1322 return serve(&listen_addr, listen_port, cred);
a87e8be2 1323}