daemon.c:handle: Remove unneeded check for null pointer.
[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{
cc44c765 238 if (!prefixcmp(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
6720e95b
RS
478static char *xstrdup_tolower(const char *str)
479{
480 char *p, *dup = xstrdup(str);
481 for (p = dup; *p; p++)
482 *p = tolower(*p);
483 return dup;
484}
485
e8dbd76d
IL
486static void parse_host_and_port(char *hostport, char **host,
487 char **port)
488{
489 if (*hostport == '[') {
490 char *end;
491
492 end = strchr(hostport, ']');
493 if (!end)
9517e6b8 494 die("Invalid request ('[' without ']')");
e8dbd76d
IL
495 *end = '\0';
496 *host = hostport + 1;
497 if (!end[1])
498 *port = NULL;
499 else if (end[1] == ':')
500 *port = end + 2;
501 else
502 die("Garbage after end of host part");
503 } else {
504 *host = hostport;
505 *port = strrchr(hostport, ':');
506 if (*port) {
e9bd3235 507 **port = '\0';
e8dbd76d
IL
508 ++*port;
509 }
510 }
511}
512
eb30aed7 513/*
73bb33a9 514 * Read the host as supplied by the client connection.
eb30aed7 515 */
73bb33a9 516static void parse_host_arg(char *extra_args, int buflen)
49ba83fb
JL
517{
518 char *val;
519 int vallen;
520 char *end = extra_args + buflen;
521
73bb33a9 522 if (extra_args < end && *extra_args) {
49ba83fb
JL
523 saw_extended_args = 1;
524 if (strncasecmp("host=", extra_args, 5) == 0) {
525 val = extra_args + 5;
526 vallen = strlen(val) + 1;
527 if (*val) {
eb30aed7 528 /* Split <host>:<port> at colon. */
e8dbd76d
IL
529 char *host;
530 char *port;
531 parse_host_and_port(val, &host, &port);
dd467629 532 if (port) {
9d7ca667
RS
533 free(tcp_port);
534 tcp_port = xstrdup(port);
dd467629 535 }
9d7ca667 536 free(hostname);
6720e95b 537 hostname = xstrdup_tolower(host);
49ba83fb 538 }
eb30aed7 539
49ba83fb
JL
540 /* On to the next one */
541 extra_args = val + vallen;
542 }
73bb33a9
SP
543 if (extra_args < end && *extra_args)
544 die("Invalid request");
49ba83fb 545 }
dd467629 546
dd467629
JL
547 /*
548 * Locate canonical hostname and its IP address.
549 */
6720e95b 550 if (hostname) {
dd467629 551#ifndef NO_IPV6
dd467629 552 struct addrinfo hints;
3e8a00ae 553 struct addrinfo *ai;
dd467629
JL
554 int gai;
555 static char addrbuf[HOST_NAME_MAX + 1];
556
557 memset(&hints, 0, sizeof(hints));
558 hints.ai_flags = AI_CANONNAME;
559
2af202be 560 gai = getaddrinfo(hostname, NULL, &hints, &ai);
dd467629 561 if (!gai) {
3e8a00ae
BK
562 struct sockaddr_in *sin_addr = (void *)ai->ai_addr;
563
564 inet_ntop(AF_INET, &sin_addr->sin_addr,
565 addrbuf, sizeof(addrbuf));
566 free(ip_address);
567 ip_address = xstrdup(addrbuf);
568
569 free(canon_hostname);
570 canon_hostname = xstrdup(ai->ai_canonname ?
571 ai->ai_canonname : ip_address);
572
573 freeaddrinfo(ai);
dd467629 574 }
dd467629 575#else
dd467629
JL
576 struct hostent *hent;
577 struct sockaddr_in sa;
578 char **ap;
579 static char addrbuf[HOST_NAME_MAX + 1];
580
9d7ca667 581 hent = gethostbyname(hostname);
dd467629
JL
582
583 ap = hent->h_addr_list;
584 memset(&sa, 0, sizeof sa);
585 sa.sin_family = hent->h_addrtype;
586 sa.sin_port = htons(0);
587 memcpy(&sa.sin_addr, *ap, hent->h_length);
588
589 inet_ntop(hent->h_addrtype, &sa.sin_addr,
590 addrbuf, sizeof(addrbuf));
eb30aed7 591
9d7ca667
RS
592 free(canon_hostname);
593 canon_hostname = xstrdup(hent->h_name);
594 free(ip_address);
595 ip_address = xstrdup(addrbuf);
dd467629 596#endif
6720e95b 597 }
dd467629
JL
598}
599
600
f9c87be6 601static int execute(void)
a87e8be2 602{
7d80694a 603 static char line[1000];
d819e4e6 604 int pktlen, len, i;
f9c87be6 605 char *addr = getenv("REMOTE_ADDR"), *port = getenv("REMOTE_PORT");
7d80694a 606
f9c87be6
EFL
607 if (addr)
608 loginfo("Connection from %s:%s", addr, port);
5b276ee4 609
960deccb 610 alarm(init_timeout ? init_timeout : timeout);
5ad312be 611 pktlen = packet_read_line(0, line, sizeof(line));
960deccb 612 alarm(0);
7d80694a 613
5ad312be
JL
614 len = strlen(line);
615 if (pktlen != len)
616 loginfo("Extended attributes (%d bytes) exist <%.*s>",
617 (int) pktlen - len,
618 (int) pktlen - len, line + len + 1);
83543a24 619 if (len && line[len-1] == '\n') {
7d80694a 620 line[--len] = 0;
83543a24
JH
621 pktlen--;
622 }
7d80694a 623
9d7ca667
RS
624 free(hostname);
625 free(canon_hostname);
626 free(ip_address);
627 free(tcp_port);
a47551c3 628 hostname = canon_hostname = ip_address = tcp_port = NULL;
eb30aed7 629
d433ed0b 630 if (len != pktlen)
73bb33a9 631 parse_host_arg(line + len + 1, pktlen - len - 1);
49ba83fb 632
d819e4e6
JH
633 for (i = 0; i < ARRAY_SIZE(daemon_service); i++) {
634 struct daemon_service *s = &(daemon_service[i]);
635 int namelen = strlen(s->name);
599065a3 636 if (!prefixcmp(line, "git-") &&
d819e4e6 637 !strncmp(s->name, line + 4, namelen) &&
49ba83fb 638 line[namelen + 4] == ' ') {
eb30aed7
JL
639 /*
640 * Note: The directory here is probably context sensitive,
641 * and might depend on the actual service being performed.
642 */
a47551c3 643 return run_service(line + namelen + 5, s);
49ba83fb 644 }
d819e4e6 645 }
a87e8be2 646
f8ff0c06 647 logerror("Protocol error: '%s'", line);
a87e8be2
LT
648 return -1;
649}
650
15515b73
EFL
651static int addrcmp(const struct sockaddr_storage *s1,
652 const struct sockaddr_storage *s2)
653{
3aff874a
BC
654 const struct sockaddr *sa1 = (const struct sockaddr*) s1;
655 const struct sockaddr *sa2 = (const struct sockaddr*) s2;
656
657 if (sa1->sa_family != sa2->sa_family)
658 return sa1->sa_family - sa2->sa_family;
659 if (sa1->sa_family == AF_INET)
15515b73
EFL
660 return memcmp(&((struct sockaddr_in *)s1)->sin_addr,
661 &((struct sockaddr_in *)s2)->sin_addr,
662 sizeof(struct in_addr));
663#ifndef NO_IPV6
3aff874a 664 if (sa1->sa_family == AF_INET6)
15515b73
EFL
665 return memcmp(&((struct sockaddr_in6 *)s1)->sin6_addr,
666 &((struct sockaddr_in6 *)s2)->sin6_addr,
667 sizeof(struct in6_addr));
668#endif
669 return 0;
670}
671
3bd62c21 672static int max_connections = 32;
66e631de 673
3bd62c21 674static unsigned int live_children;
66e631de 675
4d8fa916 676static struct child {
3bd62c21 677 struct child *next;
30e15602 678 struct child_process cld;
df076bdb 679 struct sockaddr_storage address;
3bd62c21 680} *firstborn;
66e631de 681
c295cf06 682static void add_child(struct child_process *cld, struct sockaddr *addr, socklen_t addrlen)
66e631de 683{
460c2010
JH
684 struct child *newborn, **cradle;
685
460c2010
JH
686 newborn = xcalloc(1, sizeof(*newborn));
687 live_children++;
30e15602 688 memcpy(&newborn->cld, cld, sizeof(*cld));
460c2010
JH
689 memcpy(&newborn->address, addr, addrlen);
690 for (cradle = &firstborn; *cradle; cradle = &(*cradle)->next)
15515b73 691 if (!addrcmp(&(*cradle)->address, &newborn->address))
460c2010
JH
692 break;
693 newborn->next = *cradle;
694 *cradle = newborn;
66e631de
LT
695}
696
66e631de
LT
697/*
698 * This gets called if the number of connections grows
699 * past "max_connections".
700 *
3bd62c21 701 * We kill the newest connection from a duplicate IP.
66e631de 702 */
3bd62c21 703static void kill_some_child(void)
66e631de 704{
460c2010 705 const struct child *blanket, *next;
66e631de 706
460c2010
JH
707 if (!(blanket = firstborn))
708 return;
695605b5 709
460c2010 710 for (; (next = blanket->next); blanket = next)
15515b73 711 if (!addrcmp(&blanket->address, &next->address)) {
30e15602 712 kill(blanket->cld.pid, SIGTERM);
460c2010
JH
713 break;
714 }
a5a9126b
JS
715}
716
3bd62c21 717static void check_dead_children(void)
a87e8be2 718{
3bd62c21
SB
719 int status;
720 pid_t pid;
02d57da4 721
30e15602
EFL
722 struct child **cradle, *blanket;
723 for (cradle = &firstborn; (blanket = *cradle);)
724 if ((pid = waitpid(blanket->cld.pid, &status, WNOHANG)) > 1) {
725 const char *dead = "";
726 if (status)
727 dead = " (with error)";
728 loginfo("[%"PRIuMAX"] Disconnected%s", (uintmax_t)pid, dead);
729
730 /* remove the child */
731 *cradle = blanket->next;
732 live_children--;
733 free(blanket);
734 } else
735 cradle = &blanket->next;
02d57da4
LT
736}
737
30e15602 738static char **cld_argv;
c295cf06 739static void handle(int incoming, struct sockaddr *addr, socklen_t addrlen)
02d57da4 740{
c2e86add 741 struct child_process cld = { NULL };
f9c87be6
EFL
742 char addrbuf[300] = "REMOTE_ADDR=", portbuf[300];
743 char *env[] = { addrbuf, portbuf, NULL };
02d57da4 744
3bd62c21
SB
745 if (max_connections && live_children >= max_connections) {
746 kill_some_child();
460c2010 747 sleep(1); /* give it some time to die */
3bd62c21
SB
748 check_dead_children();
749 if (live_children >= max_connections) {
750 close(incoming);
751 logerror("Too many children, dropping connection");
752 return;
753 }
754 }
02d57da4 755
f9c87be6
EFL
756 if (addr->sa_family == AF_INET) {
757 struct sockaddr_in *sin_addr = (void *) addr;
758 inet_ntop(addr->sa_family, &sin_addr->sin_addr, addrbuf + 12,
759 sizeof(addrbuf) - 12);
760 snprintf(portbuf, sizeof(portbuf), "REMOTE_PORT=%d",
761 ntohs(sin_addr->sin_port));
762#ifndef NO_IPV6
5d9cfa29 763 } else if (addr->sa_family == AF_INET6) {
f9c87be6
EFL
764 struct sockaddr_in6 *sin6_addr = (void *) addr;
765
766 char *buf = addrbuf + 12;
767 *buf++ = '['; *buf = '\0'; /* stpcpy() is cool */
768 inet_ntop(AF_INET6, &sin6_addr->sin6_addr, buf,
769 sizeof(addrbuf) - 13);
770 strcat(buf, "]");
771
772 snprintf(portbuf, sizeof(portbuf), "REMOTE_PORT=%d",
773 ntohs(sin6_addr->sin6_port));
774#endif
775 }
776
777 cld.env = (const char **)env;
30e15602
EFL
778 cld.argv = (const char **)cld_argv;
779 cld.in = incoming;
780 cld.out = dup(incoming);
a87e8be2 781
30e15602
EFL
782 if (start_command(&cld))
783 logerror("unable to fork");
784 else
785 add_child(&cld, addr, addrlen);
a87e8be2 786 close(incoming);
a87e8be2
LT
787}
788
eaa94919
LT
789static void child_handler(int signo)
790{
460c2010
JH
791 /*
792 * Otherwise empty handler because systemcalls will get interrupted
695605b5
SB
793 * upon signal receipt
794 * SysV needs the handler to be rearmed
795 */
bd7b371e 796 signal(SIGCHLD, child_handler);
eaa94919
LT
797}
798
1955fabf
MW
799static int set_reuse_addr(int sockfd)
800{
801 int on = 1;
802
803 if (!reuseaddr)
804 return 0;
805 return setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR,
806 &on, sizeof(on));
807}
808
2caa3215
AS
809struct socketlist {
810 int *list;
811 size_t nr;
812 size_t alloc;
813};
814
089d82e8
NTND
815static const char *ip2str(int family, struct sockaddr *sin, socklen_t len)
816{
817#ifdef NO_IPV6
818 static char ip[INET_ADDRSTRLEN];
819#else
820 static char ip[INET6_ADDRSTRLEN];
821#endif
822
823 switch (family) {
824#ifndef NO_IPV6
825 case AF_INET6:
826 inet_ntop(family, &((struct sockaddr_in6*)sin)->sin6_addr, ip, len);
827 break;
828#endif
829 case AF_INET:
830 inet_ntop(family, &((struct sockaddr_in*)sin)->sin_addr, ip, len);
831 break;
832 default:
833 strcpy(ip, "<unknown>");
834 }
835 return ip;
836}
837
6573faff
PA
838#ifndef NO_IPV6
839
2caa3215 840static int setup_named_sock(char *listen_addr, int listen_port, struct socketlist *socklist)
a87e8be2 841{
2caa3215 842 int socknum = 0;
df076bdb 843 int maxfd = -1;
df076bdb 844 char pbuf[NI_MAXSERV];
6573faff
PA
845 struct addrinfo hints, *ai0, *ai;
846 int gai;
20276889 847 long flags;
df076bdb 848
dd467629 849 sprintf(pbuf, "%d", listen_port);
df076bdb
YH
850 memset(&hints, 0, sizeof(hints));
851 hints.ai_family = AF_UNSPEC;
852 hints.ai_socktype = SOCK_STREAM;
853 hints.ai_protocol = IPPROTO_TCP;
854 hints.ai_flags = AI_PASSIVE;
855
dd467629 856 gai = getaddrinfo(listen_addr, pbuf, &hints, &ai0);
2caa3215
AS
857 if (gai) {
858 logerror("getaddrinfo() for %s failed: %s", listen_addr, gai_strerror(gai));
859 return 0;
860 }
df076bdb 861
df076bdb
YH
862 for (ai = ai0; ai; ai = ai->ai_next) {
863 int sockfd;
df076bdb
YH
864
865 sockfd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
866 if (sockfd < 0)
867 continue;
868 if (sockfd >= FD_SETSIZE) {
df0daf8a 869 logerror("Socket descriptor too large");
df076bdb
YH
870 close(sockfd);
871 continue;
872 }
873
874#ifdef IPV6_V6ONLY
875 if (ai->ai_family == AF_INET6) {
876 int on = 1;
877 setsockopt(sockfd, IPPROTO_IPV6, IPV6_V6ONLY,
878 &on, sizeof(on));
879 /* Note: error is not fatal */
880 }
881#endif
882
1955fabf 883 if (set_reuse_addr(sockfd)) {
089d82e8 884 logerror("Could not set SO_REUSEADDR: %s", strerror(errno));
1955fabf 885 close(sockfd);
0032d548 886 continue;
1955fabf
MW
887 }
888
df076bdb 889 if (bind(sockfd, ai->ai_addr, ai->ai_addrlen) < 0) {
089d82e8
NTND
890 logerror("Could not bind to %s: %s",
891 ip2str(ai->ai_family, ai->ai_addr, ai->ai_addrlen),
892 strerror(errno));
df076bdb
YH
893 close(sockfd);
894 continue; /* not fatal */
895 }
896 if (listen(sockfd, 5) < 0) {
089d82e8
NTND
897 logerror("Could not listen to %s: %s",
898 ip2str(ai->ai_family, ai->ai_addr, ai->ai_addrlen),
899 strerror(errno));
df076bdb
YH
900 close(sockfd);
901 continue; /* not fatal */
902 }
903
20276889
AJ
904 flags = fcntl(sockfd, F_GETFD, 0);
905 if (flags >= 0)
906 fcntl(sockfd, F_SETFD, flags | FD_CLOEXEC);
907
2caa3215
AS
908 ALLOC_GROW(socklist->list, socklist->nr + 1, socklist->alloc);
909 socklist->list[socklist->nr++] = sockfd;
910 socknum++;
df076bdb 911
df076bdb
YH
912 if (maxfd < sockfd)
913 maxfd = sockfd;
914 }
915
916 freeaddrinfo(ai0);
917
6573faff
PA
918 return socknum;
919}
920
921#else /* NO_IPV6 */
922
2caa3215 923static int setup_named_sock(char *listen_addr, int listen_port, struct socketlist *socklist)
6573faff
PA
924{
925 struct sockaddr_in sin;
926 int sockfd;
20276889 927 long flags;
6573faff 928
dd467629
JL
929 memset(&sin, 0, sizeof sin);
930 sin.sin_family = AF_INET;
931 sin.sin_port = htons(listen_port);
932
933 if (listen_addr) {
934 /* Well, host better be an IP address here. */
935 if (inet_pton(AF_INET, listen_addr, &sin.sin_addr.s_addr) <= 0)
936 return 0;
937 } else {
938 sin.sin_addr.s_addr = htonl(INADDR_ANY);
939 }
940
6573faff
PA
941 sockfd = socket(AF_INET, SOCK_STREAM, 0);
942 if (sockfd < 0)
943 return 0;
944
1955fabf 945 if (set_reuse_addr(sockfd)) {
089d82e8 946 logerror("Could not set SO_REUSEADDR: %s", strerror(errno));
1955fabf
MW
947 close(sockfd);
948 return 0;
949 }
950
6573faff 951 if ( bind(sockfd, (struct sockaddr *)&sin, sizeof sin) < 0 ) {
089d82e8
NTND
952 logerror("Could not listen to %s: %s",
953 ip2str(AF_INET, (struct sockaddr *)&sin, sizeof(sin)),
954 strerror(errno));
6573faff
PA
955 close(sockfd);
956 return 0;
957 }
a87e8be2 958
f35230fb 959 if (listen(sockfd, 5) < 0) {
089d82e8
NTND
960 logerror("Could not listen to %s: %s",
961 ip2str(AF_INET, (struct sockaddr *)&sin, sizeof(sin)),
962 strerror(errno));
f35230fb
PS
963 close(sockfd);
964 return 0;
965 }
966
20276889
AJ
967 flags = fcntl(sockfd, F_GETFD, 0);
968 if (flags >= 0)
969 fcntl(sockfd, F_SETFD, flags | FD_CLOEXEC);
970
2caa3215
AS
971 ALLOC_GROW(socklist->list, socklist->nr + 1, socklist->alloc);
972 socklist->list[socklist->nr++] = sockfd;
f35230fb 973 return 1;
6573faff
PA
974}
975
976#endif
977
3a3a29c1 978static void socksetup(struct string_list *listen_addr, int listen_port, struct socketlist *socklist)
2caa3215 979{
3a3a29c1
AS
980 if (!listen_addr->nr)
981 setup_named_sock(NULL, listen_port, socklist);
982 else {
983 int i, socknum;
984 for (i = 0; i < listen_addr->nr; i++) {
985 socknum = setup_named_sock(listen_addr->items[i].string,
986 listen_port, socklist);
987
988 if (socknum == 0)
989 logerror("unable to allocate any listen sockets for host %s on port %u",
990 listen_addr->items[i].string, listen_port);
991 }
992 }
2caa3215
AS
993}
994
995static int service_loop(struct socketlist *socklist)
6573faff
PA
996{
997 struct pollfd *pfd;
998 int i;
999
2caa3215 1000 pfd = xcalloc(socklist->nr, sizeof(struct pollfd));
6573faff 1001
2caa3215
AS
1002 for (i = 0; i < socklist->nr; i++) {
1003 pfd[i].fd = socklist->list[i];
6573faff
PA
1004 pfd[i].events = POLLIN;
1005 }
9220282a
PA
1006
1007 signal(SIGCHLD, child_handler);
a87e8be2
LT
1008
1009 for (;;) {
df076bdb 1010 int i;
6573faff 1011
695605b5
SB
1012 check_dead_children();
1013
2caa3215 1014 if (poll(pfd, socklist->nr, -1) < 0) {
1eef0b33 1015 if (errno != EINTR) {
df0daf8a 1016 logerror("Poll failed, resuming: %s",
1eef0b33
JH
1017 strerror(errno));
1018 sleep(1);
1019 }
df076bdb
YH
1020 continue;
1021 }
1022
2caa3215 1023 for (i = 0; i < socklist->nr; i++) {
6573faff 1024 if (pfd[i].revents & POLLIN) {
f9c87be6
EFL
1025 union {
1026 struct sockaddr sa;
1027 struct sockaddr_in sai;
1028#ifndef NO_IPV6
1029 struct sockaddr_in6 sai6;
1030#endif
1031 } ss;
c295cf06 1032 socklen_t sslen = sizeof(ss);
f9c87be6 1033 int incoming = accept(pfd[i].fd, &ss.sa, &sslen);
df076bdb
YH
1034 if (incoming < 0) {
1035 switch (errno) {
1036 case EAGAIN:
1037 case EINTR:
1038 case ECONNABORTED:
1039 continue;
1040 default:
d824cbba 1041 die_errno("accept returned");
df076bdb
YH
1042 }
1043 }
f9c87be6 1044 handle(incoming, &ss.sa, sslen);
a87e8be2
LT
1045 }
1046 }
a87e8be2
LT
1047 }
1048}
1049
258e93a1
ML
1050/* if any standard file descriptor is missing open it to /dev/null */
1051static void sanitize_stdfds(void)
1052{
1053 int fd = open("/dev/null", O_RDWR, 0);
1054 while (fd != -1 && fd < 2)
1055 fd = dup(fd);
1056 if (fd == -1)
d824cbba 1057 die_errno("open /dev/null or dup failed");
258e93a1
ML
1058 if (fd > 2)
1059 close(fd);
1060}
1061
a666b472
EFL
1062#ifdef NO_POSIX_GOODIES
1063
1064struct credentials;
1065
1066static void drop_privileges(struct credentials *cred)
1067{
1068 /* nothing */
1069}
1070
1071static void daemonize(void)
1072{
1073 die("--detach not supported on this platform");
1074}
1075
1076static struct credentials *prepare_credentials(const char *user_name,
1077 const char *group_name)
1078{
1079 die("--user not supported on this platform");
1080}
1081
1082#else
1083
1084struct credentials {
1085 struct passwd *pass;
1086 gid_t gid;
1087};
1088
1089static void drop_privileges(struct credentials *cred)
1090{
1091 if (cred && (initgroups(cred->pass->pw_name, cred->gid) ||
1092 setgid (cred->gid) || setuid(cred->pass->pw_uid)))
1093 die("cannot drop privileges");
1094}
1095
1096static struct credentials *prepare_credentials(const char *user_name,
1097 const char *group_name)
1098{
1099 static struct credentials c;
1100
1101 c.pass = getpwnam(user_name);
1102 if (!c.pass)
1103 die("user not found - %s", user_name);
1104
1105 if (!group_name)
1106 c.gid = c.pass->pw_gid;
1107 else {
1108 struct group *group = getgrnam(group_name);
1109 if (!group)
1110 die("group not found - %s", group_name);
1111
1112 c.gid = group->gr_gid;
1113 }
1114
1115 return &c;
1116}
1117
a5262768
ML
1118static void daemonize(void)
1119{
1120 switch (fork()) {
1121 case 0:
1122 break;
1123 case -1:
d824cbba 1124 die_errno("fork failed");
a5262768
ML
1125 default:
1126 exit(0);
1127 }
1128 if (setsid() == -1)
d824cbba 1129 die_errno("setsid failed");
a5262768
ML
1130 close(0);
1131 close(1);
1132 close(2);
1133 sanitize_stdfds();
1134}
a666b472 1135#endif
a5262768 1136
45ed5d7f
ML
1137static void store_pid(const char *path)
1138{
1139 FILE *f = fopen(path, "w");
1140 if (!f)
d824cbba 1141 die_errno("cannot open pid file '%s'", path);
85e72830 1142 if (fprintf(f, "%"PRIuMAX"\n", (uintmax_t) getpid()) < 0 || fclose(f) != 0)
d824cbba 1143 die_errno("failed to write pid file '%s'", path);
45ed5d7f
ML
1144}
1145
a666b472
EFL
1146static int serve(struct string_list *listen_addr, int listen_port,
1147 struct credentials *cred)
6573faff 1148{
2caa3215 1149 struct socketlist socklist = { NULL, 0, 0 };
4ae22d96 1150
2caa3215
AS
1151 socksetup(listen_addr, listen_port, &socklist);
1152 if (socklist.nr == 0)
3a3a29c1
AS
1153 die("unable to allocate any listen sockets on port %u",
1154 listen_port);
4ae22d96 1155
a666b472 1156 drop_privileges(cred);
678dac6b 1157
f6a34cfb
CB
1158 loginfo("Ready to rumble");
1159
2caa3215 1160 return service_loop(&socklist);
4ae22d96 1161}
6573faff 1162
a87e8be2
LT
1163int main(int argc, char **argv)
1164{
dd467629 1165 int listen_port = 0;
3a3a29c1 1166 struct string_list listen_addr = STRING_LIST_INIT_NODUP;
30e15602 1167 int serve_mode = 0, inetd_mode = 0;
678dac6b 1168 const char *pid_file = NULL, *user_name = NULL, *group_name = NULL;
a5262768 1169 int detach = 0;
a666b472 1170 struct credentials *cred = NULL;
a87e8be2
LT
1171 int i;
1172
5e9637c6
ÆAB
1173 git_setup_gettext();
1174
2fb3f6db
SP
1175 git_extract_argv0_path(argv[0]);
1176
a87e8be2
LT
1177 for (i = 1; i < argc; i++) {
1178 char *arg = argv[i];
1179
cc44c765 1180 if (!prefixcmp(arg, "--listen=")) {
3a3a29c1 1181 string_list_append(&listen_addr, xstrdup_tolower(arg + 9));
6720e95b 1182 continue;
dd467629 1183 }
cc44c765 1184 if (!prefixcmp(arg, "--port=")) {
a87e8be2
LT
1185 char *end;
1186 unsigned long n;
1187 n = strtoul(arg+7, &end, 0);
1188 if (arg[7] && !*end) {
dd467629 1189 listen_port = n;
a87e8be2
LT
1190 continue;
1191 }
1192 }
30e15602
EFL
1193 if (!strcmp(arg, "--serve")) {
1194 serve_mode = 1;
1195 continue;
1196 }
e64e1b79
LT
1197 if (!strcmp(arg, "--inetd")) {
1198 inetd_mode = 1;
a8883288 1199 log_syslog = 1;
e64e1b79
LT
1200 continue;
1201 }
f8ff0c06
PB
1202 if (!strcmp(arg, "--verbose")) {
1203 verbose = 1;
1204 continue;
1205 }
9048fe1c
PB
1206 if (!strcmp(arg, "--syslog")) {
1207 log_syslog = 1;
9048fe1c
PB
1208 continue;
1209 }
4ae95682
PA
1210 if (!strcmp(arg, "--export-all")) {
1211 export_all_trees = 1;
1212 continue;
1213 }
93741e4a
JH
1214 if (!prefixcmp(arg, "--access-hook=")) {
1215 access_hook = arg + 14;
1216 continue;
1217 }
cc44c765 1218 if (!prefixcmp(arg, "--timeout=")) {
960deccb 1219 timeout = atoi(arg+10);
a8883288 1220 continue;
960deccb 1221 }
cc44c765 1222 if (!prefixcmp(arg, "--init-timeout=")) {
960deccb 1223 init_timeout = atoi(arg+15);
a8883288 1224 continue;
960deccb 1225 }
3bd62c21
SB
1226 if (!prefixcmp(arg, "--max-connections=")) {
1227 max_connections = atoi(arg+18);
1228 if (max_connections < 0)
1229 max_connections = 0; /* unlimited */
1230 continue;
1231 }
4dbd1352
AE
1232 if (!strcmp(arg, "--strict-paths")) {
1233 strict_paths = 1;
1234 continue;
1235 }
cc44c765 1236 if (!prefixcmp(arg, "--base-path=")) {
b21c31c9
PB
1237 base_path = arg+12;
1238 continue;
1239 }
73a7a656
JA
1240 if (!strcmp(arg, "--base-path-relaxed")) {
1241 base_path_relaxed = 1;
1242 continue;
1243 }
cc44c765 1244 if (!prefixcmp(arg, "--interpolated-path=")) {
49ba83fb
JL
1245 interpolated_path = arg+20;
1246 continue;
1247 }
1955fabf
MW
1248 if (!strcmp(arg, "--reuseaddr")) {
1249 reuseaddr = 1;
1250 continue;
1251 }
603968d2
JH
1252 if (!strcmp(arg, "--user-path")) {
1253 user_path = "";
1254 continue;
1255 }
cc44c765 1256 if (!prefixcmp(arg, "--user-path=")) {
603968d2
JH
1257 user_path = arg + 12;
1258 continue;
1259 }
cc44c765 1260 if (!prefixcmp(arg, "--pid-file=")) {
45ed5d7f
ML
1261 pid_file = arg + 11;
1262 continue;
1263 }
a5262768
ML
1264 if (!strcmp(arg, "--detach")) {
1265 detach = 1;
1266 log_syslog = 1;
1267 continue;
1268 }
cc44c765 1269 if (!prefixcmp(arg, "--user=")) {
678dac6b
TS
1270 user_name = arg + 7;
1271 continue;
1272 }
cc44c765 1273 if (!prefixcmp(arg, "--group=")) {
678dac6b
TS
1274 group_name = arg + 8;
1275 continue;
1276 }
cc44c765 1277 if (!prefixcmp(arg, "--enable=")) {
d819e4e6
JH
1278 enable_service(arg + 9, 1);
1279 continue;
1280 }
cc44c765 1281 if (!prefixcmp(arg, "--disable=")) {
d819e4e6
JH
1282 enable_service(arg + 10, 0);
1283 continue;
1284 }
cc44c765 1285 if (!prefixcmp(arg, "--allow-override=")) {
74c0cc21 1286 make_service_overridable(arg + 17, 1);
d819e4e6
JH
1287 continue;
1288 }
cc44c765 1289 if (!prefixcmp(arg, "--forbid-override=")) {
74c0cc21 1290 make_service_overridable(arg + 18, 0);
d819e4e6
JH
1291 continue;
1292 }
d5570f4d
JK
1293 if (!prefixcmp(arg, "--informative-errors")) {
1294 informative_errors = 1;
1295 continue;
1296 }
1297 if (!prefixcmp(arg, "--no-informative-errors")) {
1298 informative_errors = 0;
1299 continue;
1300 }
4ae95682
PA
1301 if (!strcmp(arg, "--")) {
1302 ok_paths = &argv[i+1];
1303 break;
1304 } else if (arg[0] != '-') {
1305 ok_paths = &argv[i];
1306 break;
1307 }
e64e1b79 1308
a87e8be2
LT
1309 usage(daemon_usage);
1310 }
1311
22665bba 1312 if (log_syslog) {
6a992e9e 1313 openlog("git-daemon", LOG_PID, LOG_DAEMON);
22665bba 1314 set_die_routine(daemon_die);
460c2010 1315 } else
48196afd 1316 /* avoid splitting a message in the middle */
48cfaea1 1317 setvbuf(stderr, NULL, _IOFBF, 4096);
22665bba 1318
9cddf56e
EFL
1319 if (inetd_mode && (detach || group_name || user_name))
1320 die("--detach, --user and --group are incompatible with --inetd");
678dac6b 1321
3a3a29c1 1322 if (inetd_mode && (listen_port || (listen_addr.nr > 0)))
dd467629
JL
1323 die("--listen= and --port= are incompatible with --inetd");
1324 else if (listen_port == 0)
1325 listen_port = DEFAULT_GIT_PORT;
1326
678dac6b
TS
1327 if (group_name && !user_name)
1328 die("--group supplied without --user");
1329
a666b472
EFL
1330 if (user_name)
1331 cred = prepare_credentials(user_name, group_name);
678dac6b 1332
ad8b4f56
ML
1333 if (strict_paths && (!ok_paths || !*ok_paths))
1334 die("option --strict-paths requires a whitelist");
1335
90b4a71c
JH
1336 if (base_path && !is_directory(base_path))
1337 die("base-path '%s' does not exist or is not a directory",
1338 base_path);
20632071 1339
7c3693f1 1340 if (inetd_mode) {
30e15602
EFL
1341 if (!freopen("/dev/null", "w", stderr))
1342 die_errno("failed to redirect stderr to /dev/null");
1343 }
1344
f9c87be6
EFL
1345 if (inetd_mode || serve_mode)
1346 return execute();
bce8230d 1347
f6a34cfb 1348 if (detach)
a5262768
ML
1349 daemonize();
1350 else
1351 sanitize_stdfds();
258e93a1 1352
45ed5d7f
ML
1353 if (pid_file)
1354 store_pid(pid_file);
1355
30e15602
EFL
1356 /* prepare argv for serving-processes */
1357 cld_argv = xmalloc(sizeof (char *) * (argc + 2));
081f84ee
JN
1358 cld_argv[0] = argv[0]; /* git-daemon */
1359 cld_argv[1] = "--serve";
1360 for (i = 1; i < argc; ++i)
1361 cld_argv[i+1] = argv[i];
30e15602
EFL
1362 cld_argv[argc+1] = NULL;
1363
a666b472 1364 return serve(&listen_addr, listen_port, cred);
a87e8be2 1365}