t5570: test git-daemon's --interpolated-path option
[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 */
1055a890
JK
42static const char *base_path;
43static const 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
1055a890 109static const char *path_ok(const char *directory)
4ae95682 110{
603968d2 111 static char rpath[PATH_MAX];
49ba83fb 112 static char interp_path[PATH_MAX];
1c64b48e 113 const char *path;
1055a890 114 const char *dir;
49ba83fb 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);
1055a890 134 const char *slash = strchr(dir, '/');
603968d2
JH
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{
ae021d87
JK
238 const char *service;
239
240 if (skip_prefix(var, "daemon.", &service) &&
241 !strcmp(service, service_looking_at->config_name)) {
d819e4e6
JH
242 service_enabled = git_config_bool(var, value);
243 return 0;
244 }
245
246 /* we are not interested in parsing any other configuration here */
247 return 0;
248}
249
d5570f4d
JK
250static int daemon_error(const char *dir, const char *msg)
251{
252 if (!informative_errors)
253 msg = "access denied or repository not exported";
254 packet_write(1, "ERR %s: %s", msg, dir);
255 return -1;
256}
257
1055a890 258static const char *access_hook;
93741e4a
JH
259
260static int run_access_hook(struct daemon_service *service, const char *dir, const char *path)
261{
262 struct child_process child;
263 struct strbuf buf = STRBUF_INIT;
264 const char *argv[8];
265 const char **arg = argv;
266 char *eol;
267 int seen_errors = 0;
268
269#define STRARG(x) ((x) ? (x) : "")
270 *arg++ = access_hook;
271 *arg++ = service->name;
272 *arg++ = path;
273 *arg++ = STRARG(hostname);
274 *arg++ = STRARG(canon_hostname);
275 *arg++ = STRARG(ip_address);
276 *arg++ = STRARG(tcp_port);
277 *arg = NULL;
278#undef STRARG
279
280 memset(&child, 0, sizeof(child));
281 child.use_shell = 1;
282 child.argv = argv;
283 child.no_stdin = 1;
284 child.no_stderr = 1;
285 child.out = -1;
286 if (start_command(&child)) {
287 logerror("daemon access hook '%s' failed to start",
288 access_hook);
289 goto error_return;
290 }
291 if (strbuf_read(&buf, child.out, 0) < 0) {
292 logerror("failed to read from pipe to daemon access hook '%s'",
293 access_hook);
294 strbuf_reset(&buf);
295 seen_errors = 1;
296 }
297 if (close(child.out) < 0) {
298 logerror("failed to close pipe to daemon access hook '%s'",
299 access_hook);
300 seen_errors = 1;
301 }
302 if (finish_command(&child))
303 seen_errors = 1;
304
305 if (!seen_errors) {
306 strbuf_release(&buf);
307 return 0;
308 }
309
310error_return:
311 strbuf_ltrim(&buf);
312 if (!buf.len)
313 strbuf_addstr(&buf, "service rejected");
314 eol = strchr(buf.buf, '\n');
315 if (eol)
316 *eol = '\0';
317 errno = EACCES;
318 daemon_error(dir, buf.buf);
319 strbuf_release(&buf);
320 return -1;
321}
322
1055a890 323static int run_service(const char *dir, struct daemon_service *service)
a87e8be2 324{
4dbd1352 325 const char *path;
d819e4e6
JH
326 int enabled = service->enabled;
327
a47551c3 328 loginfo("Request %s for '%s'", service->name, dir);
4dbd1352 329
d819e4e6
JH
330 if (!enabled && !service->overridable) {
331 logerror("'%s': service not enabled.", service->name);
332 errno = EACCES;
d5570f4d 333 return daemon_error(dir, "service not enabled");
d819e4e6 334 }
4ae95682 335
a47551c3 336 if (!(path = path_ok(dir)))
d5570f4d 337 return daemon_error(dir, "no such repository");
47888f0f 338
a87e8be2
LT
339 /*
340 * Security on the cheap.
341 *
a935c397 342 * We want a readable HEAD, usable "objects" directory, and
a87e8be2
LT
343 * a "git-daemon-export-ok" flag that says that the other side
344 * is ok with us doing this.
4dbd1352
AE
345 *
346 * path_ok() uses enter_repo() and does whitelist checking.
347 * We only need to make sure the repository is exported.
a87e8be2 348 */
4dbd1352 349
3e04c62d 350 if (!export_all_trees && access("git-daemon-export-ok", F_OK)) {
4dbd1352 351 logerror("'%s': repository not exported.", path);
3e04c62d 352 errno = EACCES;
d5570f4d 353 return daemon_error(dir, "repository not exported");
3e04c62d
PA
354 }
355
d819e4e6
JH
356 if (service->overridable) {
357 service_looking_at = service;
358 service_enabled = -1;
ef90d6d4 359 git_config(git_daemon_config, NULL);
d819e4e6
JH
360 if (0 <= service_enabled)
361 enabled = service_enabled;
362 }
363 if (!enabled) {
364 logerror("'%s': service not enabled for '%s'",
365 service->name, path);
366 errno = EACCES;
d5570f4d 367 return daemon_error(dir, "service not enabled");
d819e4e6
JH
368 }
369
93741e4a
JH
370 /*
371 * Optionally, a hook can choose to deny access to the
372 * repository depending on the phase of the moon.
373 */
374 if (access_hook && run_access_hook(service, dir, path))
375 return -1;
376
02d57da4
LT
377 /*
378 * We'll ignore SIGTERM from now on, we have a
379 * good client.
380 */
381 signal(SIGTERM, SIG_IGN);
382
d819e4e6
JH
383 return service->fn();
384}
385
5d87dd4f
JS
386static void copy_to_log(int fd)
387{
388 struct strbuf line = STRBUF_INIT;
389 FILE *fp;
390
391 fp = fdopen(fd, "r");
392 if (fp == NULL) {
393 logerror("fdopen of error channel failed");
394 close(fd);
395 return;
396 }
397
398 while (strbuf_getline(&line, fp, '\n') != EOF) {
399 logerror("%s", line.buf);
400 strbuf_setlen(&line, 0);
401 }
402
403 strbuf_release(&line);
404 fclose(fp);
405}
406
407static int run_service_command(const char **argv)
408{
409 struct child_process cld;
410
411 memset(&cld, 0, sizeof(cld));
412 cld.argv = argv;
413 cld.git_cmd = 1;
414 cld.err = -1;
415 if (start_command(&cld))
416 return -1;
417
418 close(0);
419 close(1);
420
421 copy_to_log(cld.err);
422
423 return finish_command(&cld);
424}
425
d819e4e6
JH
426static int upload_pack(void)
427{
428 /* Timeout as string */
429 char timeout_buf[64];
66dbfd55
GV
430 const char *argv[] = { "upload-pack", "--strict", NULL, ".", NULL };
431
432 argv[2] = timeout_buf;
d819e4e6 433
960deccb 434 snprintf(timeout_buf, sizeof timeout_buf, "--timeout=%u", timeout);
5d87dd4f 435 return run_service_command(argv);
a87e8be2
LT
436}
437
39345a21
FBH
438static int upload_archive(void)
439{
5d87dd4f
JS
440 static const char *argv[] = { "upload-archive", ".", NULL };
441 return run_service_command(argv);
39345a21
FBH
442}
443
4b3b1e1e
LT
444static int receive_pack(void)
445{
5d87dd4f
JS
446 static const char *argv[] = { "receive-pack", ".", NULL };
447 return run_service_command(argv);
4b3b1e1e
LT
448}
449
d819e4e6 450static struct daemon_service daemon_service[] = {
39345a21 451 { "upload-archive", "uploadarch", upload_archive, 0, 1 },
d819e4e6 452 { "upload-pack", "uploadpack", upload_pack, 1, 1 },
4b3b1e1e 453 { "receive-pack", "receivepack", receive_pack, 0, 1 },
d819e4e6
JH
454};
455
f3fa1838
JH
456static void enable_service(const char *name, int ena)
457{
d819e4e6
JH
458 int i;
459 for (i = 0; i < ARRAY_SIZE(daemon_service); i++) {
460 if (!strcmp(daemon_service[i].name, name)) {
461 daemon_service[i].enabled = ena;
462 return;
463 }
464 }
465 die("No such service %s", name);
466}
467
f3fa1838
JH
468static void make_service_overridable(const char *name, int ena)
469{
d819e4e6
JH
470 int i;
471 for (i = 0; i < ARRAY_SIZE(daemon_service); i++) {
472 if (!strcmp(daemon_service[i].name, name)) {
473 daemon_service[i].overridable = ena;
474 return;
475 }
476 }
477 die("No such service %s", name);
478}
479
e8dbd76d
IL
480static void parse_host_and_port(char *hostport, char **host,
481 char **port)
482{
483 if (*hostport == '[') {
484 char *end;
485
486 end = strchr(hostport, ']');
487 if (!end)
9517e6b8 488 die("Invalid request ('[' without ']')");
e8dbd76d
IL
489 *end = '\0';
490 *host = hostport + 1;
491 if (!end[1])
492 *port = NULL;
493 else if (end[1] == ':')
494 *port = end + 2;
495 else
496 die("Garbage after end of host part");
497 } else {
498 *host = hostport;
499 *port = strrchr(hostport, ':');
500 if (*port) {
e9bd3235 501 **port = '\0';
e8dbd76d
IL
502 ++*port;
503 }
504 }
505}
506
eb30aed7 507/*
73bb33a9 508 * Read the host as supplied by the client connection.
eb30aed7 509 */
73bb33a9 510static void parse_host_arg(char *extra_args, int buflen)
49ba83fb
JL
511{
512 char *val;
513 int vallen;
514 char *end = extra_args + buflen;
515
73bb33a9 516 if (extra_args < end && *extra_args) {
49ba83fb
JL
517 saw_extended_args = 1;
518 if (strncasecmp("host=", extra_args, 5) == 0) {
519 val = extra_args + 5;
520 vallen = strlen(val) + 1;
521 if (*val) {
eb30aed7 522 /* Split <host>:<port> at colon. */
e8dbd76d
IL
523 char *host;
524 char *port;
525 parse_host_and_port(val, &host, &port);
dd467629 526 if (port) {
9d7ca667
RS
527 free(tcp_port);
528 tcp_port = xstrdup(port);
dd467629 529 }
9d7ca667 530 free(hostname);
6720e95b 531 hostname = xstrdup_tolower(host);
49ba83fb 532 }
eb30aed7 533
49ba83fb
JL
534 /* On to the next one */
535 extra_args = val + vallen;
536 }
73bb33a9
SP
537 if (extra_args < end && *extra_args)
538 die("Invalid request");
49ba83fb 539 }
dd467629 540
dd467629
JL
541 /*
542 * Locate canonical hostname and its IP address.
543 */
6720e95b 544 if (hostname) {
dd467629 545#ifndef NO_IPV6
dd467629 546 struct addrinfo hints;
3e8a00ae 547 struct addrinfo *ai;
dd467629
JL
548 int gai;
549 static char addrbuf[HOST_NAME_MAX + 1];
550
551 memset(&hints, 0, sizeof(hints));
552 hints.ai_flags = AI_CANONNAME;
553
2af202be 554 gai = getaddrinfo(hostname, NULL, &hints, &ai);
dd467629 555 if (!gai) {
3e8a00ae
BK
556 struct sockaddr_in *sin_addr = (void *)ai->ai_addr;
557
558 inet_ntop(AF_INET, &sin_addr->sin_addr,
559 addrbuf, sizeof(addrbuf));
560 free(ip_address);
561 ip_address = xstrdup(addrbuf);
562
563 free(canon_hostname);
564 canon_hostname = xstrdup(ai->ai_canonname ?
565 ai->ai_canonname : ip_address);
566
567 freeaddrinfo(ai);
dd467629 568 }
dd467629 569#else
dd467629
JL
570 struct hostent *hent;
571 struct sockaddr_in sa;
572 char **ap;
573 static char addrbuf[HOST_NAME_MAX + 1];
574
9d7ca667 575 hent = gethostbyname(hostname);
eb6c4035
RS
576 if (hent) {
577 ap = hent->h_addr_list;
578 memset(&sa, 0, sizeof sa);
579 sa.sin_family = hent->h_addrtype;
580 sa.sin_port = htons(0);
581 memcpy(&sa.sin_addr, *ap, hent->h_length);
582
583 inet_ntop(hent->h_addrtype, &sa.sin_addr,
584 addrbuf, sizeof(addrbuf));
dd467629 585
eb6c4035
RS
586 free(canon_hostname);
587 canon_hostname = xstrdup(hent->h_name);
588 free(ip_address);
589 ip_address = xstrdup(addrbuf);
590 }
dd467629 591#endif
6720e95b 592 }
dd467629
JL
593}
594
595
f9c87be6 596static int execute(void)
a87e8be2 597{
74543a04 598 char *line = packet_buffer;
d819e4e6 599 int pktlen, len, i;
f9c87be6 600 char *addr = getenv("REMOTE_ADDR"), *port = getenv("REMOTE_PORT");
7d80694a 601
f9c87be6
EFL
602 if (addr)
603 loginfo("Connection from %s:%s", addr, port);
5b276ee4 604
960deccb 605 alarm(init_timeout ? init_timeout : timeout);
4981fe75 606 pktlen = packet_read(0, NULL, NULL, packet_buffer, sizeof(packet_buffer), 0);
960deccb 607 alarm(0);
7d80694a 608
5ad312be
JL
609 len = strlen(line);
610 if (pktlen != len)
611 loginfo("Extended attributes (%d bytes) exist <%.*s>",
612 (int) pktlen - len,
613 (int) pktlen - len, line + len + 1);
83543a24 614 if (len && line[len-1] == '\n') {
7d80694a 615 line[--len] = 0;
83543a24
JH
616 pktlen--;
617 }
7d80694a 618
9d7ca667
RS
619 free(hostname);
620 free(canon_hostname);
621 free(ip_address);
622 free(tcp_port);
a47551c3 623 hostname = canon_hostname = ip_address = tcp_port = NULL;
eb30aed7 624
d433ed0b 625 if (len != pktlen)
73bb33a9 626 parse_host_arg(line + len + 1, pktlen - len - 1);
49ba83fb 627
d819e4e6
JH
628 for (i = 0; i < ARRAY_SIZE(daemon_service); i++) {
629 struct daemon_service *s = &(daemon_service[i]);
d12c24d2
JK
630 const char *arg;
631
632 if (skip_prefix(line, "git-", &arg) &&
633 skip_prefix(arg, s->name, &arg) &&
634 *arg++ == ' ') {
eb30aed7
JL
635 /*
636 * Note: The directory here is probably context sensitive,
637 * and might depend on the actual service being performed.
638 */
d12c24d2 639 return run_service(arg, s);
49ba83fb 640 }
d819e4e6 641 }
a87e8be2 642
f8ff0c06 643 logerror("Protocol error: '%s'", line);
a87e8be2
LT
644 return -1;
645}
646
15515b73
EFL
647static int addrcmp(const struct sockaddr_storage *s1,
648 const struct sockaddr_storage *s2)
649{
3aff874a
BC
650 const struct sockaddr *sa1 = (const struct sockaddr*) s1;
651 const struct sockaddr *sa2 = (const struct sockaddr*) s2;
652
653 if (sa1->sa_family != sa2->sa_family)
654 return sa1->sa_family - sa2->sa_family;
655 if (sa1->sa_family == AF_INET)
15515b73
EFL
656 return memcmp(&((struct sockaddr_in *)s1)->sin_addr,
657 &((struct sockaddr_in *)s2)->sin_addr,
658 sizeof(struct in_addr));
659#ifndef NO_IPV6
3aff874a 660 if (sa1->sa_family == AF_INET6)
15515b73
EFL
661 return memcmp(&((struct sockaddr_in6 *)s1)->sin6_addr,
662 &((struct sockaddr_in6 *)s2)->sin6_addr,
663 sizeof(struct in6_addr));
664#endif
665 return 0;
666}
667
3bd62c21 668static int max_connections = 32;
66e631de 669
3bd62c21 670static unsigned int live_children;
66e631de 671
4d8fa916 672static struct child {
3bd62c21 673 struct child *next;
30e15602 674 struct child_process cld;
df076bdb 675 struct sockaddr_storage address;
3bd62c21 676} *firstborn;
66e631de 677
c295cf06 678static void add_child(struct child_process *cld, struct sockaddr *addr, socklen_t addrlen)
66e631de 679{
460c2010
JH
680 struct child *newborn, **cradle;
681
460c2010
JH
682 newborn = xcalloc(1, sizeof(*newborn));
683 live_children++;
30e15602 684 memcpy(&newborn->cld, cld, sizeof(*cld));
460c2010
JH
685 memcpy(&newborn->address, addr, addrlen);
686 for (cradle = &firstborn; *cradle; cradle = &(*cradle)->next)
15515b73 687 if (!addrcmp(&(*cradle)->address, &newborn->address))
460c2010
JH
688 break;
689 newborn->next = *cradle;
690 *cradle = newborn;
66e631de
LT
691}
692
66e631de
LT
693/*
694 * This gets called if the number of connections grows
695 * past "max_connections".
696 *
3bd62c21 697 * We kill the newest connection from a duplicate IP.
66e631de 698 */
3bd62c21 699static void kill_some_child(void)
66e631de 700{
460c2010 701 const struct child *blanket, *next;
66e631de 702
460c2010
JH
703 if (!(blanket = firstborn))
704 return;
695605b5 705
460c2010 706 for (; (next = blanket->next); blanket = next)
15515b73 707 if (!addrcmp(&blanket->address, &next->address)) {
30e15602 708 kill(blanket->cld.pid, SIGTERM);
460c2010
JH
709 break;
710 }
a5a9126b
JS
711}
712
3bd62c21 713static void check_dead_children(void)
a87e8be2 714{
3bd62c21
SB
715 int status;
716 pid_t pid;
02d57da4 717
30e15602
EFL
718 struct child **cradle, *blanket;
719 for (cradle = &firstborn; (blanket = *cradle);)
720 if ((pid = waitpid(blanket->cld.pid, &status, WNOHANG)) > 1) {
721 const char *dead = "";
722 if (status)
723 dead = " (with error)";
724 loginfo("[%"PRIuMAX"] Disconnected%s", (uintmax_t)pid, dead);
725
726 /* remove the child */
727 *cradle = blanket->next;
728 live_children--;
729 free(blanket);
730 } else
731 cradle = &blanket->next;
02d57da4
LT
732}
733
30e15602 734static char **cld_argv;
c295cf06 735static void handle(int incoming, struct sockaddr *addr, socklen_t addrlen)
02d57da4 736{
c2e86add 737 struct child_process cld = { NULL };
f9c87be6
EFL
738 char addrbuf[300] = "REMOTE_ADDR=", portbuf[300];
739 char *env[] = { addrbuf, portbuf, NULL };
02d57da4 740
3bd62c21
SB
741 if (max_connections && live_children >= max_connections) {
742 kill_some_child();
460c2010 743 sleep(1); /* give it some time to die */
3bd62c21
SB
744 check_dead_children();
745 if (live_children >= max_connections) {
746 close(incoming);
747 logerror("Too many children, dropping connection");
748 return;
749 }
750 }
02d57da4 751
f9c87be6
EFL
752 if (addr->sa_family == AF_INET) {
753 struct sockaddr_in *sin_addr = (void *) addr;
754 inet_ntop(addr->sa_family, &sin_addr->sin_addr, addrbuf + 12,
755 sizeof(addrbuf) - 12);
756 snprintf(portbuf, sizeof(portbuf), "REMOTE_PORT=%d",
757 ntohs(sin_addr->sin_port));
758#ifndef NO_IPV6
5d9cfa29 759 } else if (addr->sa_family == AF_INET6) {
f9c87be6
EFL
760 struct sockaddr_in6 *sin6_addr = (void *) addr;
761
762 char *buf = addrbuf + 12;
763 *buf++ = '['; *buf = '\0'; /* stpcpy() is cool */
764 inet_ntop(AF_INET6, &sin6_addr->sin6_addr, buf,
765 sizeof(addrbuf) - 13);
766 strcat(buf, "]");
767
768 snprintf(portbuf, sizeof(portbuf), "REMOTE_PORT=%d",
769 ntohs(sin6_addr->sin6_port));
770#endif
771 }
772
773 cld.env = (const char **)env;
30e15602
EFL
774 cld.argv = (const char **)cld_argv;
775 cld.in = incoming;
776 cld.out = dup(incoming);
a87e8be2 777
30e15602
EFL
778 if (start_command(&cld))
779 logerror("unable to fork");
780 else
781 add_child(&cld, addr, addrlen);
a87e8be2
LT
782}
783
eaa94919
LT
784static void child_handler(int signo)
785{
460c2010
JH
786 /*
787 * Otherwise empty handler because systemcalls will get interrupted
695605b5
SB
788 * upon signal receipt
789 * SysV needs the handler to be rearmed
790 */
bd7b371e 791 signal(SIGCHLD, child_handler);
eaa94919
LT
792}
793
1955fabf
MW
794static int set_reuse_addr(int sockfd)
795{
796 int on = 1;
797
798 if (!reuseaddr)
799 return 0;
800 return setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR,
801 &on, sizeof(on));
802}
803
2caa3215
AS
804struct socketlist {
805 int *list;
806 size_t nr;
807 size_t alloc;
808};
809
089d82e8
NTND
810static const char *ip2str(int family, struct sockaddr *sin, socklen_t len)
811{
812#ifdef NO_IPV6
813 static char ip[INET_ADDRSTRLEN];
814#else
815 static char ip[INET6_ADDRSTRLEN];
816#endif
817
818 switch (family) {
819#ifndef NO_IPV6
820 case AF_INET6:
821 inet_ntop(family, &((struct sockaddr_in6*)sin)->sin6_addr, ip, len);
822 break;
823#endif
824 case AF_INET:
825 inet_ntop(family, &((struct sockaddr_in*)sin)->sin_addr, ip, len);
826 break;
827 default:
828 strcpy(ip, "<unknown>");
829 }
830 return ip;
831}
832
6573faff
PA
833#ifndef NO_IPV6
834
2caa3215 835static int setup_named_sock(char *listen_addr, int listen_port, struct socketlist *socklist)
a87e8be2 836{
2caa3215 837 int socknum = 0;
df076bdb 838 char pbuf[NI_MAXSERV];
6573faff
PA
839 struct addrinfo hints, *ai0, *ai;
840 int gai;
20276889 841 long flags;
df076bdb 842
dd467629 843 sprintf(pbuf, "%d", listen_port);
df076bdb
YH
844 memset(&hints, 0, sizeof(hints));
845 hints.ai_family = AF_UNSPEC;
846 hints.ai_socktype = SOCK_STREAM;
847 hints.ai_protocol = IPPROTO_TCP;
848 hints.ai_flags = AI_PASSIVE;
849
dd467629 850 gai = getaddrinfo(listen_addr, pbuf, &hints, &ai0);
2caa3215
AS
851 if (gai) {
852 logerror("getaddrinfo() for %s failed: %s", listen_addr, gai_strerror(gai));
853 return 0;
854 }
df076bdb 855
df076bdb
YH
856 for (ai = ai0; ai; ai = ai->ai_next) {
857 int sockfd;
df076bdb
YH
858
859 sockfd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
860 if (sockfd < 0)
861 continue;
862 if (sockfd >= FD_SETSIZE) {
df0daf8a 863 logerror("Socket descriptor too large");
df076bdb
YH
864 close(sockfd);
865 continue;
866 }
867
868#ifdef IPV6_V6ONLY
869 if (ai->ai_family == AF_INET6) {
870 int on = 1;
871 setsockopt(sockfd, IPPROTO_IPV6, IPV6_V6ONLY,
872 &on, sizeof(on));
873 /* Note: error is not fatal */
874 }
875#endif
876
1955fabf 877 if (set_reuse_addr(sockfd)) {
089d82e8 878 logerror("Could not set SO_REUSEADDR: %s", strerror(errno));
1955fabf 879 close(sockfd);
0032d548 880 continue;
1955fabf
MW
881 }
882
df076bdb 883 if (bind(sockfd, ai->ai_addr, ai->ai_addrlen) < 0) {
089d82e8
NTND
884 logerror("Could not bind to %s: %s",
885 ip2str(ai->ai_family, ai->ai_addr, ai->ai_addrlen),
886 strerror(errno));
df076bdb
YH
887 close(sockfd);
888 continue; /* not fatal */
889 }
890 if (listen(sockfd, 5) < 0) {
089d82e8
NTND
891 logerror("Could not listen to %s: %s",
892 ip2str(ai->ai_family, ai->ai_addr, ai->ai_addrlen),
893 strerror(errno));
df076bdb
YH
894 close(sockfd);
895 continue; /* not fatal */
896 }
897
20276889
AJ
898 flags = fcntl(sockfd, F_GETFD, 0);
899 if (flags >= 0)
900 fcntl(sockfd, F_SETFD, flags | FD_CLOEXEC);
901
2caa3215
AS
902 ALLOC_GROW(socklist->list, socklist->nr + 1, socklist->alloc);
903 socklist->list[socklist->nr++] = sockfd;
904 socknum++;
df076bdb
YH
905 }
906
907 freeaddrinfo(ai0);
908
6573faff
PA
909 return socknum;
910}
911
912#else /* NO_IPV6 */
913
2caa3215 914static int setup_named_sock(char *listen_addr, int listen_port, struct socketlist *socklist)
6573faff
PA
915{
916 struct sockaddr_in sin;
917 int sockfd;
20276889 918 long flags;
6573faff 919
dd467629
JL
920 memset(&sin, 0, sizeof sin);
921 sin.sin_family = AF_INET;
922 sin.sin_port = htons(listen_port);
923
924 if (listen_addr) {
925 /* Well, host better be an IP address here. */
926 if (inet_pton(AF_INET, listen_addr, &sin.sin_addr.s_addr) <= 0)
927 return 0;
928 } else {
929 sin.sin_addr.s_addr = htonl(INADDR_ANY);
930 }
931
6573faff
PA
932 sockfd = socket(AF_INET, SOCK_STREAM, 0);
933 if (sockfd < 0)
934 return 0;
935
1955fabf 936 if (set_reuse_addr(sockfd)) {
089d82e8 937 logerror("Could not set SO_REUSEADDR: %s", strerror(errno));
1955fabf
MW
938 close(sockfd);
939 return 0;
940 }
941
6573faff 942 if ( bind(sockfd, (struct sockaddr *)&sin, sizeof sin) < 0 ) {
9d1b9aa9 943 logerror("Could not bind to %s: %s",
089d82e8
NTND
944 ip2str(AF_INET, (struct sockaddr *)&sin, sizeof(sin)),
945 strerror(errno));
6573faff
PA
946 close(sockfd);
947 return 0;
948 }
a87e8be2 949
f35230fb 950 if (listen(sockfd, 5) < 0) {
089d82e8
NTND
951 logerror("Could not listen to %s: %s",
952 ip2str(AF_INET, (struct sockaddr *)&sin, sizeof(sin)),
953 strerror(errno));
f35230fb
PS
954 close(sockfd);
955 return 0;
956 }
957
20276889
AJ
958 flags = fcntl(sockfd, F_GETFD, 0);
959 if (flags >= 0)
960 fcntl(sockfd, F_SETFD, flags | FD_CLOEXEC);
961
2caa3215
AS
962 ALLOC_GROW(socklist->list, socklist->nr + 1, socklist->alloc);
963 socklist->list[socklist->nr++] = sockfd;
f35230fb 964 return 1;
6573faff
PA
965}
966
967#endif
968
3a3a29c1 969static void socksetup(struct string_list *listen_addr, int listen_port, struct socketlist *socklist)
2caa3215 970{
3a3a29c1
AS
971 if (!listen_addr->nr)
972 setup_named_sock(NULL, listen_port, socklist);
973 else {
974 int i, socknum;
975 for (i = 0; i < listen_addr->nr; i++) {
976 socknum = setup_named_sock(listen_addr->items[i].string,
977 listen_port, socklist);
978
979 if (socknum == 0)
980 logerror("unable to allocate any listen sockets for host %s on port %u",
981 listen_addr->items[i].string, listen_port);
982 }
983 }
2caa3215
AS
984}
985
986static int service_loop(struct socketlist *socklist)
6573faff
PA
987{
988 struct pollfd *pfd;
989 int i;
990
2caa3215 991 pfd = xcalloc(socklist->nr, sizeof(struct pollfd));
6573faff 992
2caa3215
AS
993 for (i = 0; i < socklist->nr; i++) {
994 pfd[i].fd = socklist->list[i];
6573faff
PA
995 pfd[i].events = POLLIN;
996 }
9220282a
PA
997
998 signal(SIGCHLD, child_handler);
a87e8be2
LT
999
1000 for (;;) {
df076bdb 1001 int i;
6573faff 1002
695605b5
SB
1003 check_dead_children();
1004
2caa3215 1005 if (poll(pfd, socklist->nr, -1) < 0) {
1eef0b33 1006 if (errno != EINTR) {
df0daf8a 1007 logerror("Poll failed, resuming: %s",
1eef0b33
JH
1008 strerror(errno));
1009 sleep(1);
1010 }
df076bdb
YH
1011 continue;
1012 }
1013
2caa3215 1014 for (i = 0; i < socklist->nr; i++) {
6573faff 1015 if (pfd[i].revents & POLLIN) {
f9c87be6
EFL
1016 union {
1017 struct sockaddr sa;
1018 struct sockaddr_in sai;
1019#ifndef NO_IPV6
1020 struct sockaddr_in6 sai6;
1021#endif
1022 } ss;
c295cf06 1023 socklen_t sslen = sizeof(ss);
f9c87be6 1024 int incoming = accept(pfd[i].fd, &ss.sa, &sslen);
df076bdb
YH
1025 if (incoming < 0) {
1026 switch (errno) {
1027 case EAGAIN:
1028 case EINTR:
1029 case ECONNABORTED:
1030 continue;
1031 default:
d824cbba 1032 die_errno("accept returned");
df076bdb
YH
1033 }
1034 }
f9c87be6 1035 handle(incoming, &ss.sa, sslen);
a87e8be2
LT
1036 }
1037 }
a87e8be2
LT
1038 }
1039}
1040
a666b472
EFL
1041#ifdef NO_POSIX_GOODIES
1042
1043struct credentials;
1044
1045static void drop_privileges(struct credentials *cred)
1046{
1047 /* nothing */
1048}
1049
a666b472
EFL
1050static struct credentials *prepare_credentials(const char *user_name,
1051 const char *group_name)
1052{
1053 die("--user not supported on this platform");
1054}
1055
1056#else
1057
1058struct credentials {
1059 struct passwd *pass;
1060 gid_t gid;
1061};
1062
1063static void drop_privileges(struct credentials *cred)
1064{
1065 if (cred && (initgroups(cred->pass->pw_name, cred->gid) ||
1066 setgid (cred->gid) || setuid(cred->pass->pw_uid)))
1067 die("cannot drop privileges");
1068}
1069
1070static struct credentials *prepare_credentials(const char *user_name,
1071 const char *group_name)
1072{
1073 static struct credentials c;
1074
1075 c.pass = getpwnam(user_name);
1076 if (!c.pass)
1077 die("user not found - %s", user_name);
1078
1079 if (!group_name)
1080 c.gid = c.pass->pw_gid;
1081 else {
1082 struct group *group = getgrnam(group_name);
1083 if (!group)
1084 die("group not found - %s", group_name);
1085
1086 c.gid = group->gr_gid;
1087 }
1088
1089 return &c;
1090}
a666b472 1091#endif
a5262768 1092
45ed5d7f
ML
1093static void store_pid(const char *path)
1094{
1095 FILE *f = fopen(path, "w");
1096 if (!f)
d824cbba 1097 die_errno("cannot open pid file '%s'", path);
85e72830 1098 if (fprintf(f, "%"PRIuMAX"\n", (uintmax_t) getpid()) < 0 || fclose(f) != 0)
d824cbba 1099 die_errno("failed to write pid file '%s'", path);
45ed5d7f
ML
1100}
1101
a666b472
EFL
1102static int serve(struct string_list *listen_addr, int listen_port,
1103 struct credentials *cred)
6573faff 1104{
2caa3215 1105 struct socketlist socklist = { NULL, 0, 0 };
4ae22d96 1106
2caa3215
AS
1107 socksetup(listen_addr, listen_port, &socklist);
1108 if (socklist.nr == 0)
3a3a29c1
AS
1109 die("unable to allocate any listen sockets on port %u",
1110 listen_port);
4ae22d96 1111
a666b472 1112 drop_privileges(cred);
678dac6b 1113
f6a34cfb
CB
1114 loginfo("Ready to rumble");
1115
2caa3215 1116 return service_loop(&socklist);
4ae22d96 1117}
6573faff 1118
a87e8be2
LT
1119int main(int argc, char **argv)
1120{
dd467629 1121 int listen_port = 0;
3a3a29c1 1122 struct string_list listen_addr = STRING_LIST_INIT_NODUP;
30e15602 1123 int serve_mode = 0, inetd_mode = 0;
678dac6b 1124 const char *pid_file = NULL, *user_name = NULL, *group_name = NULL;
a5262768 1125 int detach = 0;
a666b472 1126 struct credentials *cred = NULL;
a87e8be2
LT
1127 int i;
1128
5e9637c6
ÆAB
1129 git_setup_gettext();
1130
2fb3f6db
SP
1131 git_extract_argv0_path(argv[0]);
1132
a87e8be2
LT
1133 for (i = 1; i < argc; i++) {
1134 char *arg = argv[i];
ae021d87 1135 const char *v;
a87e8be2 1136
ae021d87
JK
1137 if (skip_prefix(arg, "--listen=", &v)) {
1138 string_list_append(&listen_addr, xstrdup_tolower(v));
6720e95b 1139 continue;
dd467629 1140 }
ae021d87 1141 if (skip_prefix(arg, "--port=", &v)) {
a87e8be2
LT
1142 char *end;
1143 unsigned long n;
ae021d87
JK
1144 n = strtoul(v, &end, 0);
1145 if (*v && !*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 }
ae021d87
JK
1171 if (skip_prefix(arg, "--access-hook=", &v)) {
1172 access_hook = v;
93741e4a
JH
1173 continue;
1174 }
ae021d87
JK
1175 if (skip_prefix(arg, "--timeout=", &v)) {
1176 timeout = atoi(v);
a8883288 1177 continue;
960deccb 1178 }
ae021d87
JK
1179 if (skip_prefix(arg, "--init-timeout=", &v)) {
1180 init_timeout = atoi(v);
a8883288 1181 continue;
960deccb 1182 }
ae021d87
JK
1183 if (skip_prefix(arg, "--max-connections=", &v)) {
1184 max_connections = atoi(v);
3bd62c21
SB
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 }
ae021d87
JK
1193 if (skip_prefix(arg, "--base-path=", &v)) {
1194 base_path = v;
b21c31c9
PB
1195 continue;
1196 }
73a7a656
JA
1197 if (!strcmp(arg, "--base-path-relaxed")) {
1198 base_path_relaxed = 1;
1199 continue;
1200 }
ae021d87
JK
1201 if (skip_prefix(arg, "--interpolated-path=", &v)) {
1202 interpolated_path = v;
49ba83fb
JL
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 }
ae021d87
JK
1213 if (skip_prefix(arg, "--user-path=", &v)) {
1214 user_path = v;
603968d2
JH
1215 continue;
1216 }
ae021d87
JK
1217 if (skip_prefix(arg, "--pid-file=", &v)) {
1218 pid_file = v;
45ed5d7f
ML
1219 continue;
1220 }
a5262768
ML
1221 if (!strcmp(arg, "--detach")) {
1222 detach = 1;
1223 log_syslog = 1;
1224 continue;
1225 }
ae021d87
JK
1226 if (skip_prefix(arg, "--user=", &v)) {
1227 user_name = v;
678dac6b
TS
1228 continue;
1229 }
ae021d87
JK
1230 if (skip_prefix(arg, "--group=", &v)) {
1231 group_name = v;
678dac6b
TS
1232 continue;
1233 }
ae021d87
JK
1234 if (skip_prefix(arg, "--enable=", &v)) {
1235 enable_service(v, 1);
d819e4e6
JH
1236 continue;
1237 }
ae021d87
JK
1238 if (skip_prefix(arg, "--disable=", &v)) {
1239 enable_service(v, 0);
d819e4e6
JH
1240 continue;
1241 }
ae021d87
JK
1242 if (skip_prefix(arg, "--allow-override=", &v)) {
1243 make_service_overridable(v, 1);
d819e4e6
JH
1244 continue;
1245 }
ae021d87
JK
1246 if (skip_prefix(arg, "--forbid-override=", &v)) {
1247 make_service_overridable(v, 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}