fast-import: use skip_prefix for parsing input
[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);
dd467629
JL
576
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));
eb30aed7 585
9d7ca667
RS
586 free(canon_hostname);
587 canon_hostname = xstrdup(hent->h_name);
588 free(ip_address);
589 ip_address = xstrdup(addrbuf);
dd467629 590#endif
6720e95b 591 }
dd467629
JL
592}
593
594
f9c87be6 595static int execute(void)
a87e8be2 596{
74543a04 597 char *line = packet_buffer;
d819e4e6 598 int pktlen, len, i;
f9c87be6 599 char *addr = getenv("REMOTE_ADDR"), *port = getenv("REMOTE_PORT");
7d80694a 600
f9c87be6
EFL
601 if (addr)
602 loginfo("Connection from %s:%s", addr, port);
5b276ee4 603
960deccb 604 alarm(init_timeout ? init_timeout : timeout);
4981fe75 605 pktlen = packet_read(0, NULL, NULL, packet_buffer, sizeof(packet_buffer), 0);
960deccb 606 alarm(0);
7d80694a 607
5ad312be
JL
608 len = strlen(line);
609 if (pktlen != len)
610 loginfo("Extended attributes (%d bytes) exist <%.*s>",
611 (int) pktlen - len,
612 (int) pktlen - len, line + len + 1);
83543a24 613 if (len && line[len-1] == '\n') {
7d80694a 614 line[--len] = 0;
83543a24
JH
615 pktlen--;
616 }
7d80694a 617
9d7ca667
RS
618 free(hostname);
619 free(canon_hostname);
620 free(ip_address);
621 free(tcp_port);
a47551c3 622 hostname = canon_hostname = ip_address = tcp_port = NULL;
eb30aed7 623
d433ed0b 624 if (len != pktlen)
73bb33a9 625 parse_host_arg(line + len + 1, pktlen - len - 1);
49ba83fb 626
d819e4e6
JH
627 for (i = 0; i < ARRAY_SIZE(daemon_service); i++) {
628 struct daemon_service *s = &(daemon_service[i]);
629 int namelen = strlen(s->name);
59556548 630 if (starts_with(line, "git-") &&
d819e4e6 631 !strncmp(s->name, line + 4, namelen) &&
49ba83fb 632 line[namelen + 4] == ' ') {
eb30aed7
JL
633 /*
634 * Note: The directory here is probably context sensitive,
635 * and might depend on the actual service being performed.
636 */
a47551c3 637 return run_service(line + namelen + 5, s);
49ba83fb 638 }
d819e4e6 639 }
a87e8be2 640
f8ff0c06 641 logerror("Protocol error: '%s'", line);
a87e8be2
LT
642 return -1;
643}
644
15515b73
EFL
645static int addrcmp(const struct sockaddr_storage *s1,
646 const struct sockaddr_storage *s2)
647{
3aff874a
BC
648 const struct sockaddr *sa1 = (const struct sockaddr*) s1;
649 const struct sockaddr *sa2 = (const struct sockaddr*) s2;
650
651 if (sa1->sa_family != sa2->sa_family)
652 return sa1->sa_family - sa2->sa_family;
653 if (sa1->sa_family == AF_INET)
15515b73
EFL
654 return memcmp(&((struct sockaddr_in *)s1)->sin_addr,
655 &((struct sockaddr_in *)s2)->sin_addr,
656 sizeof(struct in_addr));
657#ifndef NO_IPV6
3aff874a 658 if (sa1->sa_family == AF_INET6)
15515b73
EFL
659 return memcmp(&((struct sockaddr_in6 *)s1)->sin6_addr,
660 &((struct sockaddr_in6 *)s2)->sin6_addr,
661 sizeof(struct in6_addr));
662#endif
663 return 0;
664}
665
3bd62c21 666static int max_connections = 32;
66e631de 667
3bd62c21 668static unsigned int live_children;
66e631de 669
4d8fa916 670static struct child {
3bd62c21 671 struct child *next;
30e15602 672 struct child_process cld;
df076bdb 673 struct sockaddr_storage address;
3bd62c21 674} *firstborn;
66e631de 675
c295cf06 676static void add_child(struct child_process *cld, struct sockaddr *addr, socklen_t addrlen)
66e631de 677{
460c2010
JH
678 struct child *newborn, **cradle;
679
460c2010
JH
680 newborn = xcalloc(1, sizeof(*newborn));
681 live_children++;
30e15602 682 memcpy(&newborn->cld, cld, sizeof(*cld));
460c2010
JH
683 memcpy(&newborn->address, addr, addrlen);
684 for (cradle = &firstborn; *cradle; cradle = &(*cradle)->next)
15515b73 685 if (!addrcmp(&(*cradle)->address, &newborn->address))
460c2010
JH
686 break;
687 newborn->next = *cradle;
688 *cradle = newborn;
66e631de
LT
689}
690
66e631de
LT
691/*
692 * This gets called if the number of connections grows
693 * past "max_connections".
694 *
3bd62c21 695 * We kill the newest connection from a duplicate IP.
66e631de 696 */
3bd62c21 697static void kill_some_child(void)
66e631de 698{
460c2010 699 const struct child *blanket, *next;
66e631de 700
460c2010
JH
701 if (!(blanket = firstborn))
702 return;
695605b5 703
460c2010 704 for (; (next = blanket->next); blanket = next)
15515b73 705 if (!addrcmp(&blanket->address, &next->address)) {
30e15602 706 kill(blanket->cld.pid, SIGTERM);
460c2010
JH
707 break;
708 }
a5a9126b
JS
709}
710
3bd62c21 711static void check_dead_children(void)
a87e8be2 712{
3bd62c21
SB
713 int status;
714 pid_t pid;
02d57da4 715
30e15602
EFL
716 struct child **cradle, *blanket;
717 for (cradle = &firstborn; (blanket = *cradle);)
718 if ((pid = waitpid(blanket->cld.pid, &status, WNOHANG)) > 1) {
719 const char *dead = "";
720 if (status)
721 dead = " (with error)";
722 loginfo("[%"PRIuMAX"] Disconnected%s", (uintmax_t)pid, dead);
723
724 /* remove the child */
725 *cradle = blanket->next;
726 live_children--;
727 free(blanket);
728 } else
729 cradle = &blanket->next;
02d57da4
LT
730}
731
30e15602 732static char **cld_argv;
c295cf06 733static void handle(int incoming, struct sockaddr *addr, socklen_t addrlen)
02d57da4 734{
c2e86add 735 struct child_process cld = { NULL };
f9c87be6
EFL
736 char addrbuf[300] = "REMOTE_ADDR=", portbuf[300];
737 char *env[] = { addrbuf, portbuf, NULL };
02d57da4 738
3bd62c21
SB
739 if (max_connections && live_children >= max_connections) {
740 kill_some_child();
460c2010 741 sleep(1); /* give it some time to die */
3bd62c21
SB
742 check_dead_children();
743 if (live_children >= max_connections) {
744 close(incoming);
745 logerror("Too many children, dropping connection");
746 return;
747 }
748 }
02d57da4 749
f9c87be6
EFL
750 if (addr->sa_family == AF_INET) {
751 struct sockaddr_in *sin_addr = (void *) addr;
752 inet_ntop(addr->sa_family, &sin_addr->sin_addr, addrbuf + 12,
753 sizeof(addrbuf) - 12);
754 snprintf(portbuf, sizeof(portbuf), "REMOTE_PORT=%d",
755 ntohs(sin_addr->sin_port));
756#ifndef NO_IPV6
5d9cfa29 757 } else if (addr->sa_family == AF_INET6) {
f9c87be6
EFL
758 struct sockaddr_in6 *sin6_addr = (void *) addr;
759
760 char *buf = addrbuf + 12;
761 *buf++ = '['; *buf = '\0'; /* stpcpy() is cool */
762 inet_ntop(AF_INET6, &sin6_addr->sin6_addr, buf,
763 sizeof(addrbuf) - 13);
764 strcat(buf, "]");
765
766 snprintf(portbuf, sizeof(portbuf), "REMOTE_PORT=%d",
767 ntohs(sin6_addr->sin6_port));
768#endif
769 }
770
771 cld.env = (const char **)env;
30e15602
EFL
772 cld.argv = (const char **)cld_argv;
773 cld.in = incoming;
774 cld.out = dup(incoming);
a87e8be2 775
30e15602
EFL
776 if (start_command(&cld))
777 logerror("unable to fork");
778 else
779 add_child(&cld, addr, addrlen);
a87e8be2 780 close(incoming);
a87e8be2
LT
781}
782
eaa94919
LT
783static void child_handler(int signo)
784{
460c2010
JH
785 /*
786 * Otherwise empty handler because systemcalls will get interrupted
695605b5
SB
787 * upon signal receipt
788 * SysV needs the handler to be rearmed
789 */
bd7b371e 790 signal(SIGCHLD, child_handler);
eaa94919
LT
791}
792
1955fabf
MW
793static int set_reuse_addr(int sockfd)
794{
795 int on = 1;
796
797 if (!reuseaddr)
798 return 0;
799 return setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR,
800 &on, sizeof(on));
801}
802
2caa3215
AS
803struct socketlist {
804 int *list;
805 size_t nr;
806 size_t alloc;
807};
808
089d82e8
NTND
809static const char *ip2str(int family, struct sockaddr *sin, socklen_t len)
810{
811#ifdef NO_IPV6
812 static char ip[INET_ADDRSTRLEN];
813#else
814 static char ip[INET6_ADDRSTRLEN];
815#endif
816
817 switch (family) {
818#ifndef NO_IPV6
819 case AF_INET6:
820 inet_ntop(family, &((struct sockaddr_in6*)sin)->sin6_addr, ip, len);
821 break;
822#endif
823 case AF_INET:
824 inet_ntop(family, &((struct sockaddr_in*)sin)->sin_addr, ip, len);
825 break;
826 default:
827 strcpy(ip, "<unknown>");
828 }
829 return ip;
830}
831
6573faff
PA
832#ifndef NO_IPV6
833
2caa3215 834static int setup_named_sock(char *listen_addr, int listen_port, struct socketlist *socklist)
a87e8be2 835{
2caa3215 836 int socknum = 0;
df076bdb 837 int maxfd = -1;
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 905
df076bdb
YH
906 if (maxfd < sockfd)
907 maxfd = sockfd;
908 }
909
910 freeaddrinfo(ai0);
911
6573faff
PA
912 return socknum;
913}
914
915#else /* NO_IPV6 */
916
2caa3215 917static int setup_named_sock(char *listen_addr, int listen_port, struct socketlist *socklist)
6573faff
PA
918{
919 struct sockaddr_in sin;
920 int sockfd;
20276889 921 long flags;
6573faff 922
dd467629
JL
923 memset(&sin, 0, sizeof sin);
924 sin.sin_family = AF_INET;
925 sin.sin_port = htons(listen_port);
926
927 if (listen_addr) {
928 /* Well, host better be an IP address here. */
929 if (inet_pton(AF_INET, listen_addr, &sin.sin_addr.s_addr) <= 0)
930 return 0;
931 } else {
932 sin.sin_addr.s_addr = htonl(INADDR_ANY);
933 }
934
6573faff
PA
935 sockfd = socket(AF_INET, SOCK_STREAM, 0);
936 if (sockfd < 0)
937 return 0;
938
1955fabf 939 if (set_reuse_addr(sockfd)) {
089d82e8 940 logerror("Could not set SO_REUSEADDR: %s", strerror(errno));
1955fabf
MW
941 close(sockfd);
942 return 0;
943 }
944
6573faff 945 if ( bind(sockfd, (struct sockaddr *)&sin, sizeof sin) < 0 ) {
089d82e8
NTND
946 logerror("Could not listen to %s: %s",
947 ip2str(AF_INET, (struct sockaddr *)&sin, sizeof(sin)),
948 strerror(errno));
6573faff
PA
949 close(sockfd);
950 return 0;
951 }
a87e8be2 952
f35230fb 953 if (listen(sockfd, 5) < 0) {
089d82e8
NTND
954 logerror("Could not listen to %s: %s",
955 ip2str(AF_INET, (struct sockaddr *)&sin, sizeof(sin)),
956 strerror(errno));
f35230fb
PS
957 close(sockfd);
958 return 0;
959 }
960
20276889
AJ
961 flags = fcntl(sockfd, F_GETFD, 0);
962 if (flags >= 0)
963 fcntl(sockfd, F_SETFD, flags | FD_CLOEXEC);
964
2caa3215
AS
965 ALLOC_GROW(socklist->list, socklist->nr + 1, socklist->alloc);
966 socklist->list[socklist->nr++] = sockfd;
f35230fb 967 return 1;
6573faff
PA
968}
969
970#endif
971
3a3a29c1 972static void socksetup(struct string_list *listen_addr, int listen_port, struct socketlist *socklist)
2caa3215 973{
3a3a29c1
AS
974 if (!listen_addr->nr)
975 setup_named_sock(NULL, listen_port, socklist);
976 else {
977 int i, socknum;
978 for (i = 0; i < listen_addr->nr; i++) {
979 socknum = setup_named_sock(listen_addr->items[i].string,
980 listen_port, socklist);
981
982 if (socknum == 0)
983 logerror("unable to allocate any listen sockets for host %s on port %u",
984 listen_addr->items[i].string, listen_port);
985 }
986 }
2caa3215
AS
987}
988
989static int service_loop(struct socketlist *socklist)
6573faff
PA
990{
991 struct pollfd *pfd;
992 int i;
993
2caa3215 994 pfd = xcalloc(socklist->nr, sizeof(struct pollfd));
6573faff 995
2caa3215
AS
996 for (i = 0; i < socklist->nr; i++) {
997 pfd[i].fd = socklist->list[i];
6573faff
PA
998 pfd[i].events = POLLIN;
999 }
9220282a
PA
1000
1001 signal(SIGCHLD, child_handler);
a87e8be2
LT
1002
1003 for (;;) {
df076bdb 1004 int i;
6573faff 1005
695605b5
SB
1006 check_dead_children();
1007
2caa3215 1008 if (poll(pfd, socklist->nr, -1) < 0) {
1eef0b33 1009 if (errno != EINTR) {
df0daf8a 1010 logerror("Poll failed, resuming: %s",
1eef0b33
JH
1011 strerror(errno));
1012 sleep(1);
1013 }
df076bdb
YH
1014 continue;
1015 }
1016
2caa3215 1017 for (i = 0; i < socklist->nr; i++) {
6573faff 1018 if (pfd[i].revents & POLLIN) {
f9c87be6
EFL
1019 union {
1020 struct sockaddr sa;
1021 struct sockaddr_in sai;
1022#ifndef NO_IPV6
1023 struct sockaddr_in6 sai6;
1024#endif
1025 } ss;
c295cf06 1026 socklen_t sslen = sizeof(ss);
f9c87be6 1027 int incoming = accept(pfd[i].fd, &ss.sa, &sslen);
df076bdb
YH
1028 if (incoming < 0) {
1029 switch (errno) {
1030 case EAGAIN:
1031 case EINTR:
1032 case ECONNABORTED:
1033 continue;
1034 default:
d824cbba 1035 die_errno("accept returned");
df076bdb
YH
1036 }
1037 }
f9c87be6 1038 handle(incoming, &ss.sa, sslen);
a87e8be2
LT
1039 }
1040 }
a87e8be2
LT
1041 }
1042}
1043
a666b472
EFL
1044#ifdef NO_POSIX_GOODIES
1045
1046struct credentials;
1047
1048static void drop_privileges(struct credentials *cred)
1049{
1050 /* nothing */
1051}
1052
a666b472
EFL
1053static struct credentials *prepare_credentials(const char *user_name,
1054 const char *group_name)
1055{
1056 die("--user not supported on this platform");
1057}
1058
1059#else
1060
1061struct credentials {
1062 struct passwd *pass;
1063 gid_t gid;
1064};
1065
1066static void drop_privileges(struct credentials *cred)
1067{
1068 if (cred && (initgroups(cred->pass->pw_name, cred->gid) ||
1069 setgid (cred->gid) || setuid(cred->pass->pw_uid)))
1070 die("cannot drop privileges");
1071}
1072
1073static struct credentials *prepare_credentials(const char *user_name,
1074 const char *group_name)
1075{
1076 static struct credentials c;
1077
1078 c.pass = getpwnam(user_name);
1079 if (!c.pass)
1080 die("user not found - %s", user_name);
1081
1082 if (!group_name)
1083 c.gid = c.pass->pw_gid;
1084 else {
1085 struct group *group = getgrnam(group_name);
1086 if (!group)
1087 die("group not found - %s", group_name);
1088
1089 c.gid = group->gr_gid;
1090 }
1091
1092 return &c;
1093}
a666b472 1094#endif
a5262768 1095
45ed5d7f
ML
1096static void store_pid(const char *path)
1097{
1098 FILE *f = fopen(path, "w");
1099 if (!f)
d824cbba 1100 die_errno("cannot open pid file '%s'", path);
85e72830 1101 if (fprintf(f, "%"PRIuMAX"\n", (uintmax_t) getpid()) < 0 || fclose(f) != 0)
d824cbba 1102 die_errno("failed to write pid file '%s'", path);
45ed5d7f
ML
1103}
1104
a666b472
EFL
1105static int serve(struct string_list *listen_addr, int listen_port,
1106 struct credentials *cred)
6573faff 1107{
2caa3215 1108 struct socketlist socklist = { NULL, 0, 0 };
4ae22d96 1109
2caa3215
AS
1110 socksetup(listen_addr, listen_port, &socklist);
1111 if (socklist.nr == 0)
3a3a29c1
AS
1112 die("unable to allocate any listen sockets on port %u",
1113 listen_port);
4ae22d96 1114
a666b472 1115 drop_privileges(cred);
678dac6b 1116
f6a34cfb
CB
1117 loginfo("Ready to rumble");
1118
2caa3215 1119 return service_loop(&socklist);
4ae22d96 1120}
6573faff 1121
a87e8be2
LT
1122int main(int argc, char **argv)
1123{
dd467629 1124 int listen_port = 0;
3a3a29c1 1125 struct string_list listen_addr = STRING_LIST_INIT_NODUP;
30e15602 1126 int serve_mode = 0, inetd_mode = 0;
678dac6b 1127 const char *pid_file = NULL, *user_name = NULL, *group_name = NULL;
a5262768 1128 int detach = 0;
a666b472 1129 struct credentials *cred = NULL;
a87e8be2
LT
1130 int i;
1131
5e9637c6
ÆAB
1132 git_setup_gettext();
1133
2fb3f6db
SP
1134 git_extract_argv0_path(argv[0]);
1135
a87e8be2
LT
1136 for (i = 1; i < argc; i++) {
1137 char *arg = argv[i];
ae021d87 1138 const char *v;
a87e8be2 1139
ae021d87
JK
1140 if (skip_prefix(arg, "--listen=", &v)) {
1141 string_list_append(&listen_addr, xstrdup_tolower(v));
6720e95b 1142 continue;
dd467629 1143 }
ae021d87 1144 if (skip_prefix(arg, "--port=", &v)) {
a87e8be2
LT
1145 char *end;
1146 unsigned long n;
ae021d87
JK
1147 n = strtoul(v, &end, 0);
1148 if (*v && !*end) {
dd467629 1149 listen_port = n;
a87e8be2
LT
1150 continue;
1151 }
1152 }
30e15602
EFL
1153 if (!strcmp(arg, "--serve")) {
1154 serve_mode = 1;
1155 continue;
1156 }
e64e1b79
LT
1157 if (!strcmp(arg, "--inetd")) {
1158 inetd_mode = 1;
a8883288 1159 log_syslog = 1;
e64e1b79
LT
1160 continue;
1161 }
f8ff0c06
PB
1162 if (!strcmp(arg, "--verbose")) {
1163 verbose = 1;
1164 continue;
1165 }
9048fe1c
PB
1166 if (!strcmp(arg, "--syslog")) {
1167 log_syslog = 1;
9048fe1c
PB
1168 continue;
1169 }
4ae95682
PA
1170 if (!strcmp(arg, "--export-all")) {
1171 export_all_trees = 1;
1172 continue;
1173 }
ae021d87
JK
1174 if (skip_prefix(arg, "--access-hook=", &v)) {
1175 access_hook = v;
93741e4a
JH
1176 continue;
1177 }
ae021d87
JK
1178 if (skip_prefix(arg, "--timeout=", &v)) {
1179 timeout = atoi(v);
a8883288 1180 continue;
960deccb 1181 }
ae021d87
JK
1182 if (skip_prefix(arg, "--init-timeout=", &v)) {
1183 init_timeout = atoi(v);
a8883288 1184 continue;
960deccb 1185 }
ae021d87
JK
1186 if (skip_prefix(arg, "--max-connections=", &v)) {
1187 max_connections = atoi(v);
3bd62c21
SB
1188 if (max_connections < 0)
1189 max_connections = 0; /* unlimited */
1190 continue;
1191 }
4dbd1352
AE
1192 if (!strcmp(arg, "--strict-paths")) {
1193 strict_paths = 1;
1194 continue;
1195 }
ae021d87
JK
1196 if (skip_prefix(arg, "--base-path=", &v)) {
1197 base_path = v;
b21c31c9
PB
1198 continue;
1199 }
73a7a656
JA
1200 if (!strcmp(arg, "--base-path-relaxed")) {
1201 base_path_relaxed = 1;
1202 continue;
1203 }
ae021d87
JK
1204 if (skip_prefix(arg, "--interpolated-path=", &v)) {
1205 interpolated_path = v;
49ba83fb
JL
1206 continue;
1207 }
1955fabf
MW
1208 if (!strcmp(arg, "--reuseaddr")) {
1209 reuseaddr = 1;
1210 continue;
1211 }
603968d2
JH
1212 if (!strcmp(arg, "--user-path")) {
1213 user_path = "";
1214 continue;
1215 }
ae021d87
JK
1216 if (skip_prefix(arg, "--user-path=", &v)) {
1217 user_path = v;
603968d2
JH
1218 continue;
1219 }
ae021d87
JK
1220 if (skip_prefix(arg, "--pid-file=", &v)) {
1221 pid_file = v;
45ed5d7f
ML
1222 continue;
1223 }
a5262768
ML
1224 if (!strcmp(arg, "--detach")) {
1225 detach = 1;
1226 log_syslog = 1;
1227 continue;
1228 }
ae021d87
JK
1229 if (skip_prefix(arg, "--user=", &v)) {
1230 user_name = v;
678dac6b
TS
1231 continue;
1232 }
ae021d87
JK
1233 if (skip_prefix(arg, "--group=", &v)) {
1234 group_name = v;
678dac6b
TS
1235 continue;
1236 }
ae021d87
JK
1237 if (skip_prefix(arg, "--enable=", &v)) {
1238 enable_service(v, 1);
d819e4e6
JH
1239 continue;
1240 }
ae021d87
JK
1241 if (skip_prefix(arg, "--disable=", &v)) {
1242 enable_service(v, 0);
d819e4e6
JH
1243 continue;
1244 }
ae021d87
JK
1245 if (skip_prefix(arg, "--allow-override=", &v)) {
1246 make_service_overridable(v, 1);
d819e4e6
JH
1247 continue;
1248 }
ae021d87
JK
1249 if (skip_prefix(arg, "--forbid-override=", &v)) {
1250 make_service_overridable(v, 0);
d819e4e6
JH
1251 continue;
1252 }
82246b76 1253 if (!strcmp(arg, "--informative-errors")) {
d5570f4d
JK
1254 informative_errors = 1;
1255 continue;
1256 }
82246b76 1257 if (!strcmp(arg, "--no-informative-errors")) {
d5570f4d
JK
1258 informative_errors = 0;
1259 continue;
1260 }
4ae95682
PA
1261 if (!strcmp(arg, "--")) {
1262 ok_paths = &argv[i+1];
1263 break;
1264 } else if (arg[0] != '-') {
1265 ok_paths = &argv[i];
1266 break;
1267 }
e64e1b79 1268
a87e8be2
LT
1269 usage(daemon_usage);
1270 }
1271
22665bba 1272 if (log_syslog) {
6a992e9e 1273 openlog("git-daemon", LOG_PID, LOG_DAEMON);
22665bba 1274 set_die_routine(daemon_die);
460c2010 1275 } else
48196afd 1276 /* avoid splitting a message in the middle */
48cfaea1 1277 setvbuf(stderr, NULL, _IOFBF, 4096);
22665bba 1278
9cddf56e
EFL
1279 if (inetd_mode && (detach || group_name || user_name))
1280 die("--detach, --user and --group are incompatible with --inetd");
678dac6b 1281
3a3a29c1 1282 if (inetd_mode && (listen_port || (listen_addr.nr > 0)))
dd467629
JL
1283 die("--listen= and --port= are incompatible with --inetd");
1284 else if (listen_port == 0)
1285 listen_port = DEFAULT_GIT_PORT;
1286
678dac6b
TS
1287 if (group_name && !user_name)
1288 die("--group supplied without --user");
1289
a666b472
EFL
1290 if (user_name)
1291 cred = prepare_credentials(user_name, group_name);
678dac6b 1292
ad8b4f56
ML
1293 if (strict_paths && (!ok_paths || !*ok_paths))
1294 die("option --strict-paths requires a whitelist");
1295
90b4a71c
JH
1296 if (base_path && !is_directory(base_path))
1297 die("base-path '%s' does not exist or is not a directory",
1298 base_path);
20632071 1299
7c3693f1 1300 if (inetd_mode) {
30e15602
EFL
1301 if (!freopen("/dev/null", "w", stderr))
1302 die_errno("failed to redirect stderr to /dev/null");
1303 }
1304
f9c87be6
EFL
1305 if (inetd_mode || serve_mode)
1306 return execute();
bce8230d 1307
de0957ce
NTND
1308 if (detach) {
1309 if (daemonize())
1310 die("--detach not supported on this platform");
1311 } else
a5262768 1312 sanitize_stdfds();
258e93a1 1313
45ed5d7f
ML
1314 if (pid_file)
1315 store_pid(pid_file);
1316
30e15602
EFL
1317 /* prepare argv for serving-processes */
1318 cld_argv = xmalloc(sizeof (char *) * (argc + 2));
081f84ee
JN
1319 cld_argv[0] = argv[0]; /* git-daemon */
1320 cld_argv[1] = "--serve";
1321 for (i = 1; i < argc; ++i)
1322 cld_argv[i+1] = argv[i];
30e15602
EFL
1323 cld_argv[argc+1] = NULL;
1324
a666b472 1325 return serve(&listen_addr, listen_port, cred);
a87e8be2 1326}