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Commit | Line | Data |
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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" | |
f8ff0c06 | 6 | |
85023577 JH |
7 | #include <syslog.h> |
8 | ||
695dffe2 JS |
9 | #ifndef HOST_NAME_MAX |
10 | #define HOST_NAME_MAX 256 | |
11 | #endif | |
12 | ||
415e7b87 PW |
13 | #ifndef NI_MAXSERV |
14 | #define NI_MAXSERV 32 | |
15 | #endif | |
16 | ||
9048fe1c | 17 | static int log_syslog; |
f8ff0c06 | 18 | static int verbose; |
1955fabf | 19 | static int reuseaddr; |
f8ff0c06 | 20 | |
960deccb | 21 | static const char daemon_usage[] = |
1b1dd23f | 22 | "git daemon [--verbose] [--syslog] [--export-all]\n" |
3bd62c21 SB |
23 | " [--timeout=n] [--init-timeout=n] [--max-connections=n]\n" |
24 | " [--strict-paths] [--base-path=path] [--base-path-relaxed]\n" | |
73a7a656 | 25 | " [--user-path | --user-path=path]\n" |
49ba83fb | 26 | " [--interpolated-path=path]\n" |
678dac6b | 27 | " [--reuseaddr] [--detach] [--pid-file=file]\n" |
d9edcbd6 | 28 | " [--[enable|disable|allow-override|forbid-override]=service]\n" |
dd467629 JL |
29 | " [--inetd | [--listen=host_or_ipaddr] [--port=n]\n" |
30 | " [--user=user [--group=group]]\n" | |
31 | " [directory...]"; | |
4ae95682 PA |
32 | |
33 | /* List of acceptable pathname prefixes */ | |
96f1e58f DR |
34 | static char **ok_paths; |
35 | static int strict_paths; | |
4ae95682 PA |
36 | |
37 | /* If this is set, git-daemon-export-ok is not required */ | |
96f1e58f | 38 | static int export_all_trees; |
f8ff0c06 | 39 | |
b21c31c9 | 40 | /* Take all paths relative to this one if non-NULL */ |
96f1e58f | 41 | static char *base_path; |
49ba83fb | 42 | static char *interpolated_path; |
73a7a656 | 43 | static int base_path_relaxed; |
49ba83fb JL |
44 | |
45 | /* Flag indicating client sent extra args. */ | |
46 | static int saw_extended_args; | |
b21c31c9 | 47 | |
603968d2 JH |
48 | /* If defined, ~user notation is allowed and the string is inserted |
49 | * after ~user/. E.g. a request to git://host/~alice/frotz would | |
50 | * go to /home/alice/pub_git/frotz with --user-path=pub_git. | |
51 | */ | |
96f1e58f | 52 | static const char *user_path; |
603968d2 | 53 | |
960deccb | 54 | /* Timeout, and initial timeout */ |
96f1e58f DR |
55 | static unsigned int timeout; |
56 | static unsigned int init_timeout; | |
f8ff0c06 | 57 | |
9d7ca667 RS |
58 | static char *hostname; |
59 | static char *canon_hostname; | |
60 | static char *ip_address; | |
61 | static char *tcp_port; | |
49ba83fb | 62 | |
9048fe1c | 63 | static void logreport(int priority, const char *err, va_list params) |
f8ff0c06 | 64 | { |
9048fe1c | 65 | if (log_syslog) { |
6a992e9e SB |
66 | char buf[1024]; |
67 | vsnprintf(buf, sizeof(buf), err, params); | |
9048fe1c | 68 | syslog(priority, "%s", buf); |
460c2010 JH |
69 | } else { |
70 | /* | |
71 | * Since stderr is set to linebuffered mode, the | |
6a992e9e SB |
72 | * logging of different processes will not overlap |
73 | */ | |
85e72830 | 74 | fprintf(stderr, "[%"PRIuMAX"] ", (uintmax_t)getpid()); |
6a992e9e SB |
75 | vfprintf(stderr, err, params); |
76 | fputc('\n', stderr); | |
77 | } | |
f8ff0c06 PB |
78 | } |
79 | ||
28bea9e5 | 80 | __attribute__((format (printf, 1, 2))) |
cdda4745 | 81 | static void logerror(const char *err, ...) |
f8ff0c06 PB |
82 | { |
83 | va_list params; | |
84 | va_start(params, err); | |
9048fe1c | 85 | logreport(LOG_ERR, err, params); |
f8ff0c06 PB |
86 | va_end(params); |
87 | } | |
88 | ||
28bea9e5 | 89 | __attribute__((format (printf, 1, 2))) |
cdda4745 | 90 | static void loginfo(const char *err, ...) |
f8ff0c06 PB |
91 | { |
92 | va_list params; | |
93 | if (!verbose) | |
94 | return; | |
95 | va_start(params, err); | |
9048fe1c | 96 | logreport(LOG_INFO, err, params); |
f8ff0c06 PB |
97 | va_end(params); |
98 | } | |
a87e8be2 | 99 | |
ad8b4f56 ML |
100 | static void NORETURN daemon_die(const char *err, va_list params) |
101 | { | |
102 | logreport(LOG_ERR, err, params); | |
103 | exit(1); | |
104 | } | |
105 | ||
a47551c3 | 106 | static char *path_ok(char *directory) |
4ae95682 | 107 | { |
603968d2 | 108 | static char rpath[PATH_MAX]; |
49ba83fb | 109 | static char interp_path[PATH_MAX]; |
d79374c7 | 110 | char *path; |
49ba83fb JL |
111 | char *dir; |
112 | ||
9d7ca667 | 113 | dir = directory; |
d79374c7 | 114 | |
34b6cb8b | 115 | if (daemon_avoid_alias(dir)) { |
d79374c7 JH |
116 | logerror("'%s': aliased", dir); |
117 | return NULL; | |
118 | } | |
119 | ||
603968d2 JH |
120 | if (*dir == '~') { |
121 | if (!user_path) { | |
122 | logerror("'%s': User-path not allowed", dir); | |
123 | return NULL; | |
124 | } | |
125 | if (*user_path) { | |
126 | /* Got either "~alice" or "~alice/foo"; | |
127 | * rewrite them to "~alice/%s" or | |
128 | * "~alice/%s/foo". | |
129 | */ | |
130 | int namlen, restlen = strlen(dir); | |
131 | char *slash = strchr(dir, '/'); | |
132 | if (!slash) | |
133 | slash = dir + restlen; | |
134 | namlen = slash - dir; | |
135 | restlen -= namlen; | |
136 | loginfo("userpath <%s>, request <%s>, namlen %d, restlen %d, slash <%s>", user_path, dir, namlen, restlen, slash); | |
137 | snprintf(rpath, PATH_MAX, "%.*s/%s%.*s", | |
138 | namlen, dir, user_path, restlen, slash); | |
139 | dir = rpath; | |
140 | } | |
141 | } | |
49ba83fb | 142 | else if (interpolated_path && saw_extended_args) { |
9d7ca667 RS |
143 | struct strbuf expanded_path = STRBUF_INIT; |
144 | struct strbuf_expand_dict_entry dict[] = { | |
145 | { "H", hostname }, | |
146 | { "CH", canon_hostname }, | |
147 | { "IP", ip_address }, | |
148 | { "P", tcp_port }, | |
149 | { "D", directory }, | |
9d7ca667 RS |
150 | { NULL } |
151 | }; | |
152 | ||
49ba83fb JL |
153 | if (*dir != '/') { |
154 | /* Allow only absolute */ | |
155 | logerror("'%s': Non-absolute path denied (interpolated-path active)", dir); | |
156 | return NULL; | |
157 | } | |
158 | ||
9d7ca667 RS |
159 | strbuf_expand(&expanded_path, interpolated_path, |
160 | strbuf_expand_dict_cb, &dict); | |
161 | strlcpy(interp_path, expanded_path.buf, PATH_MAX); | |
162 | strbuf_release(&expanded_path); | |
49ba83fb JL |
163 | loginfo("Interpolated dir '%s'", interp_path); |
164 | ||
165 | dir = interp_path; | |
166 | } | |
603968d2 JH |
167 | else if (base_path) { |
168 | if (*dir != '/') { | |
169 | /* Allow only absolute */ | |
1fda3d55 | 170 | logerror("'%s': Non-absolute path denied (base-path active)", dir); |
b21c31c9 PB |
171 | return NULL; |
172 | } | |
49ba83fb JL |
173 | snprintf(rpath, PATH_MAX, "%s%s", base_path, dir); |
174 | dir = rpath; | |
b21c31c9 PB |
175 | } |
176 | ||
a583971f RS |
177 | path = enter_repo(dir, strict_paths); |
178 | if (!path && base_path && base_path_relaxed) { | |
73a7a656 JA |
179 | /* |
180 | * if we fail and base_path_relaxed is enabled, try without | |
181 | * prefixing the base path | |
182 | */ | |
a583971f RS |
183 | dir = directory; |
184 | path = enter_repo(dir, strict_paths); | |
185 | } | |
3e04c62d | 186 | |
4dbd1352 | 187 | if (!path) { |
05ac6b34 | 188 | logerror("'%s' does not appear to be a git repository", dir); |
4dbd1352 | 189 | return NULL; |
4ae95682 PA |
190 | } |
191 | ||
192 | if ( ok_paths && *ok_paths ) { | |
ce335fe0 | 193 | char **pp; |
4dbd1352 | 194 | int pathlen = strlen(path); |
4ae95682 | 195 | |
ce335fe0 | 196 | /* The validation is done on the paths after enter_repo |
a6080a0a | 197 | * appends optional {.git,.git/.git} and friends, but |
d79374c7 JH |
198 | * it does not use getcwd(). So if your /pub is |
199 | * a symlink to /mnt/pub, you can whitelist /pub and | |
200 | * do not have to say /mnt/pub. | |
201 | * Do not say /pub/. | |
ce335fe0 | 202 | */ |
4ae95682 PA |
203 | for ( pp = ok_paths ; *pp ; pp++ ) { |
204 | int len = strlen(*pp); | |
ce335fe0 JH |
205 | if (len <= pathlen && |
206 | !memcmp(*pp, path, len) && | |
207 | (path[len] == '\0' || | |
208 | (!strict_paths && path[len] == '/'))) | |
209 | return path; | |
4ae95682 | 210 | } |
4dbd1352 AE |
211 | } |
212 | else { | |
213 | /* be backwards compatible */ | |
214 | if (!strict_paths) | |
215 | return path; | |
4ae95682 PA |
216 | } |
217 | ||
4dbd1352 AE |
218 | logerror("'%s': not in whitelist", path); |
219 | return NULL; /* Fallthrough. Deny by default */ | |
4ae95682 | 220 | } |
a87e8be2 | 221 | |
d819e4e6 JH |
222 | typedef int (*daemon_service_fn)(void); |
223 | struct daemon_service { | |
224 | const char *name; | |
225 | const char *config_name; | |
226 | daemon_service_fn fn; | |
227 | int enabled; | |
228 | int overridable; | |
229 | }; | |
230 | ||
231 | static struct daemon_service *service_looking_at; | |
232 | static int service_enabled; | |
233 | ||
ef90d6d4 | 234 | static int git_daemon_config(const char *var, const char *value, void *cb) |
d819e4e6 | 235 | { |
cc44c765 | 236 | if (!prefixcmp(var, "daemon.") && |
d819e4e6 JH |
237 | !strcmp(var + 7, service_looking_at->config_name)) { |
238 | service_enabled = git_config_bool(var, value); | |
239 | return 0; | |
240 | } | |
241 | ||
242 | /* we are not interested in parsing any other configuration here */ | |
243 | return 0; | |
244 | } | |
245 | ||
a47551c3 | 246 | static int run_service(char *dir, struct daemon_service *service) |
a87e8be2 | 247 | { |
4dbd1352 | 248 | const char *path; |
d819e4e6 JH |
249 | int enabled = service->enabled; |
250 | ||
a47551c3 | 251 | loginfo("Request %s for '%s'", service->name, dir); |
4dbd1352 | 252 | |
d819e4e6 JH |
253 | if (!enabled && !service->overridable) { |
254 | logerror("'%s': service not enabled.", service->name); | |
255 | errno = EACCES; | |
256 | return -1; | |
257 | } | |
4ae95682 | 258 | |
a47551c3 | 259 | if (!(path = path_ok(dir))) |
a87e8be2 | 260 | return -1; |
47888f0f | 261 | |
a87e8be2 LT |
262 | /* |
263 | * Security on the cheap. | |
264 | * | |
a935c397 | 265 | * We want a readable HEAD, usable "objects" directory, and |
a87e8be2 LT |
266 | * a "git-daemon-export-ok" flag that says that the other side |
267 | * is ok with us doing this. | |
4dbd1352 AE |
268 | * |
269 | * path_ok() uses enter_repo() and does whitelist checking. | |
270 | * We only need to make sure the repository is exported. | |
a87e8be2 | 271 | */ |
4dbd1352 | 272 | |
3e04c62d | 273 | if (!export_all_trees && access("git-daemon-export-ok", F_OK)) { |
4dbd1352 | 274 | logerror("'%s': repository not exported.", path); |
3e04c62d PA |
275 | errno = EACCES; |
276 | return -1; | |
277 | } | |
278 | ||
d819e4e6 JH |
279 | if (service->overridable) { |
280 | service_looking_at = service; | |
281 | service_enabled = -1; | |
ef90d6d4 | 282 | git_config(git_daemon_config, NULL); |
d819e4e6 JH |
283 | if (0 <= service_enabled) |
284 | enabled = service_enabled; | |
285 | } | |
286 | if (!enabled) { | |
287 | logerror("'%s': service not enabled for '%s'", | |
288 | service->name, path); | |
289 | errno = EACCES; | |
290 | return -1; | |
291 | } | |
292 | ||
02d57da4 LT |
293 | /* |
294 | * We'll ignore SIGTERM from now on, we have a | |
295 | * good client. | |
296 | */ | |
297 | signal(SIGTERM, SIG_IGN); | |
298 | ||
d819e4e6 JH |
299 | return service->fn(); |
300 | } | |
301 | ||
5d87dd4f JS |
302 | static void copy_to_log(int fd) |
303 | { | |
304 | struct strbuf line = STRBUF_INIT; | |
305 | FILE *fp; | |
306 | ||
307 | fp = fdopen(fd, "r"); | |
308 | if (fp == NULL) { | |
309 | logerror("fdopen of error channel failed"); | |
310 | close(fd); | |
311 | return; | |
312 | } | |
313 | ||
314 | while (strbuf_getline(&line, fp, '\n') != EOF) { | |
315 | logerror("%s", line.buf); | |
316 | strbuf_setlen(&line, 0); | |
317 | } | |
318 | ||
319 | strbuf_release(&line); | |
320 | fclose(fp); | |
321 | } | |
322 | ||
323 | static int run_service_command(const char **argv) | |
324 | { | |
325 | struct child_process cld; | |
326 | ||
327 | memset(&cld, 0, sizeof(cld)); | |
328 | cld.argv = argv; | |
329 | cld.git_cmd = 1; | |
330 | cld.err = -1; | |
331 | if (start_command(&cld)) | |
332 | return -1; | |
333 | ||
334 | close(0); | |
335 | close(1); | |
336 | ||
337 | copy_to_log(cld.err); | |
338 | ||
339 | return finish_command(&cld); | |
340 | } | |
341 | ||
d819e4e6 JH |
342 | static int upload_pack(void) |
343 | { | |
344 | /* Timeout as string */ | |
345 | char timeout_buf[64]; | |
5d87dd4f | 346 | const char *argv[] = { "upload-pack", "--strict", timeout_buf, ".", NULL }; |
d819e4e6 | 347 | |
960deccb | 348 | snprintf(timeout_buf, sizeof timeout_buf, "--timeout=%u", timeout); |
5d87dd4f | 349 | return run_service_command(argv); |
a87e8be2 LT |
350 | } |
351 | ||
39345a21 FBH |
352 | static int upload_archive(void) |
353 | { | |
5d87dd4f JS |
354 | static const char *argv[] = { "upload-archive", ".", NULL }; |
355 | return run_service_command(argv); | |
39345a21 FBH |
356 | } |
357 | ||
4b3b1e1e LT |
358 | static int receive_pack(void) |
359 | { | |
5d87dd4f JS |
360 | static const char *argv[] = { "receive-pack", ".", NULL }; |
361 | return run_service_command(argv); | |
4b3b1e1e LT |
362 | } |
363 | ||
d819e4e6 | 364 | static struct daemon_service daemon_service[] = { |
39345a21 | 365 | { "upload-archive", "uploadarch", upload_archive, 0, 1 }, |
d819e4e6 | 366 | { "upload-pack", "uploadpack", upload_pack, 1, 1 }, |
4b3b1e1e | 367 | { "receive-pack", "receivepack", receive_pack, 0, 1 }, |
d819e4e6 JH |
368 | }; |
369 | ||
f3fa1838 JH |
370 | static void enable_service(const char *name, int ena) |
371 | { | |
d819e4e6 JH |
372 | int i; |
373 | for (i = 0; i < ARRAY_SIZE(daemon_service); i++) { | |
374 | if (!strcmp(daemon_service[i].name, name)) { | |
375 | daemon_service[i].enabled = ena; | |
376 | return; | |
377 | } | |
378 | } | |
379 | die("No such service %s", name); | |
380 | } | |
381 | ||
f3fa1838 JH |
382 | static void make_service_overridable(const char *name, int ena) |
383 | { | |
d819e4e6 JH |
384 | int i; |
385 | for (i = 0; i < ARRAY_SIZE(daemon_service); i++) { | |
386 | if (!strcmp(daemon_service[i].name, name)) { | |
387 | daemon_service[i].overridable = ena; | |
388 | return; | |
389 | } | |
390 | } | |
391 | die("No such service %s", name); | |
392 | } | |
393 | ||
6720e95b RS |
394 | static char *xstrdup_tolower(const char *str) |
395 | { | |
396 | char *p, *dup = xstrdup(str); | |
397 | for (p = dup; *p; p++) | |
398 | *p = tolower(*p); | |
399 | return dup; | |
400 | } | |
401 | ||
e8dbd76d IL |
402 | static void parse_host_and_port(char *hostport, char **host, |
403 | char **port) | |
404 | { | |
405 | if (*hostport == '[') { | |
406 | char *end; | |
407 | ||
408 | end = strchr(hostport, ']'); | |
409 | if (!end) | |
9517e6b8 | 410 | die("Invalid request ('[' without ']')"); |
e8dbd76d IL |
411 | *end = '\0'; |
412 | *host = hostport + 1; | |
413 | if (!end[1]) | |
414 | *port = NULL; | |
415 | else if (end[1] == ':') | |
416 | *port = end + 2; | |
417 | else | |
418 | die("Garbage after end of host part"); | |
419 | } else { | |
420 | *host = hostport; | |
421 | *port = strrchr(hostport, ':'); | |
422 | if (*port) { | |
e9bd3235 | 423 | **port = '\0'; |
e8dbd76d IL |
424 | ++*port; |
425 | } | |
426 | } | |
427 | } | |
428 | ||
eb30aed7 | 429 | /* |
73bb33a9 | 430 | * Read the host as supplied by the client connection. |
eb30aed7 | 431 | */ |
73bb33a9 | 432 | static void parse_host_arg(char *extra_args, int buflen) |
49ba83fb JL |
433 | { |
434 | char *val; | |
435 | int vallen; | |
436 | char *end = extra_args + buflen; | |
437 | ||
73bb33a9 | 438 | if (extra_args < end && *extra_args) { |
49ba83fb JL |
439 | saw_extended_args = 1; |
440 | if (strncasecmp("host=", extra_args, 5) == 0) { | |
441 | val = extra_args + 5; | |
442 | vallen = strlen(val) + 1; | |
443 | if (*val) { | |
eb30aed7 | 444 | /* Split <host>:<port> at colon. */ |
e8dbd76d IL |
445 | char *host; |
446 | char *port; | |
447 | parse_host_and_port(val, &host, &port); | |
dd467629 | 448 | if (port) { |
9d7ca667 RS |
449 | free(tcp_port); |
450 | tcp_port = xstrdup(port); | |
dd467629 | 451 | } |
9d7ca667 | 452 | free(hostname); |
6720e95b | 453 | hostname = xstrdup_tolower(host); |
49ba83fb | 454 | } |
eb30aed7 | 455 | |
49ba83fb JL |
456 | /* On to the next one */ |
457 | extra_args = val + vallen; | |
458 | } | |
73bb33a9 SP |
459 | if (extra_args < end && *extra_args) |
460 | die("Invalid request"); | |
49ba83fb | 461 | } |
dd467629 | 462 | |
dd467629 JL |
463 | /* |
464 | * Locate canonical hostname and its IP address. | |
465 | */ | |
6720e95b | 466 | if (hostname) { |
dd467629 | 467 | #ifndef NO_IPV6 |
dd467629 | 468 | struct addrinfo hints; |
3e8a00ae | 469 | struct addrinfo *ai; |
dd467629 JL |
470 | int gai; |
471 | static char addrbuf[HOST_NAME_MAX + 1]; | |
472 | ||
473 | memset(&hints, 0, sizeof(hints)); | |
474 | hints.ai_flags = AI_CANONNAME; | |
475 | ||
2af202be | 476 | gai = getaddrinfo(hostname, NULL, &hints, &ai); |
dd467629 | 477 | if (!gai) { |
3e8a00ae BK |
478 | struct sockaddr_in *sin_addr = (void *)ai->ai_addr; |
479 | ||
480 | inet_ntop(AF_INET, &sin_addr->sin_addr, | |
481 | addrbuf, sizeof(addrbuf)); | |
482 | free(ip_address); | |
483 | ip_address = xstrdup(addrbuf); | |
484 | ||
485 | free(canon_hostname); | |
486 | canon_hostname = xstrdup(ai->ai_canonname ? | |
487 | ai->ai_canonname : ip_address); | |
488 | ||
489 | freeaddrinfo(ai); | |
dd467629 | 490 | } |
dd467629 | 491 | #else |
dd467629 JL |
492 | struct hostent *hent; |
493 | struct sockaddr_in sa; | |
494 | char **ap; | |
495 | static char addrbuf[HOST_NAME_MAX + 1]; | |
496 | ||
9d7ca667 | 497 | hent = gethostbyname(hostname); |
dd467629 JL |
498 | |
499 | ap = hent->h_addr_list; | |
500 | memset(&sa, 0, sizeof sa); | |
501 | sa.sin_family = hent->h_addrtype; | |
502 | sa.sin_port = htons(0); | |
503 | memcpy(&sa.sin_addr, *ap, hent->h_length); | |
504 | ||
505 | inet_ntop(hent->h_addrtype, &sa.sin_addr, | |
506 | addrbuf, sizeof(addrbuf)); | |
eb30aed7 | 507 | |
9d7ca667 RS |
508 | free(canon_hostname); |
509 | canon_hostname = xstrdup(hent->h_name); | |
510 | free(ip_address); | |
511 | ip_address = xstrdup(addrbuf); | |
dd467629 | 512 | #endif |
6720e95b | 513 | } |
dd467629 JL |
514 | } |
515 | ||
516 | ||
5b276ee4 | 517 | static int execute(struct sockaddr *addr) |
a87e8be2 | 518 | { |
7d80694a | 519 | static char line[1000]; |
d819e4e6 | 520 | int pktlen, len, i; |
7d80694a | 521 | |
5b276ee4 DW |
522 | if (addr) { |
523 | char addrbuf[256] = ""; | |
524 | int port = -1; | |
525 | ||
526 | if (addr->sa_family == AF_INET) { | |
527 | struct sockaddr_in *sin_addr = (void *) addr; | |
528 | inet_ntop(addr->sa_family, &sin_addr->sin_addr, addrbuf, sizeof(addrbuf)); | |
c67359be | 529 | port = ntohs(sin_addr->sin_port); |
5b276ee4 DW |
530 | #ifndef NO_IPV6 |
531 | } else if (addr && addr->sa_family == AF_INET6) { | |
532 | struct sockaddr_in6 *sin6_addr = (void *) addr; | |
533 | ||
534 | char *buf = addrbuf; | |
535 | *buf++ = '['; *buf = '\0'; /* stpcpy() is cool */ | |
536 | inet_ntop(AF_INET6, &sin6_addr->sin6_addr, buf, sizeof(addrbuf) - 1); | |
537 | strcat(buf, "]"); | |
538 | ||
c67359be | 539 | port = ntohs(sin6_addr->sin6_port); |
5b276ee4 DW |
540 | #endif |
541 | } | |
542 | loginfo("Connection from %s:%d", addrbuf, port); | |
53ffb878 JH |
543 | setenv("REMOTE_ADDR", addrbuf, 1); |
544 | } | |
545 | else { | |
546 | unsetenv("REMOTE_ADDR"); | |
5b276ee4 DW |
547 | } |
548 | ||
960deccb | 549 | alarm(init_timeout ? init_timeout : timeout); |
5ad312be | 550 | pktlen = packet_read_line(0, line, sizeof(line)); |
960deccb | 551 | alarm(0); |
7d80694a | 552 | |
5ad312be JL |
553 | len = strlen(line); |
554 | if (pktlen != len) | |
555 | loginfo("Extended attributes (%d bytes) exist <%.*s>", | |
556 | (int) pktlen - len, | |
557 | (int) pktlen - len, line + len + 1); | |
83543a24 | 558 | if (len && line[len-1] == '\n') { |
7d80694a | 559 | line[--len] = 0; |
83543a24 JH |
560 | pktlen--; |
561 | } | |
7d80694a | 562 | |
9d7ca667 RS |
563 | free(hostname); |
564 | free(canon_hostname); | |
565 | free(ip_address); | |
566 | free(tcp_port); | |
a47551c3 | 567 | hostname = canon_hostname = ip_address = tcp_port = NULL; |
eb30aed7 | 568 | |
d433ed0b | 569 | if (len != pktlen) |
73bb33a9 | 570 | parse_host_arg(line + len + 1, pktlen - len - 1); |
49ba83fb | 571 | |
d819e4e6 JH |
572 | for (i = 0; i < ARRAY_SIZE(daemon_service); i++) { |
573 | struct daemon_service *s = &(daemon_service[i]); | |
574 | int namelen = strlen(s->name); | |
599065a3 | 575 | if (!prefixcmp(line, "git-") && |
d819e4e6 | 576 | !strncmp(s->name, line + 4, namelen) && |
49ba83fb | 577 | line[namelen + 4] == ' ') { |
eb30aed7 JL |
578 | /* |
579 | * Note: The directory here is probably context sensitive, | |
580 | * and might depend on the actual service being performed. | |
581 | */ | |
a47551c3 | 582 | return run_service(line + namelen + 5, s); |
49ba83fb | 583 | } |
d819e4e6 | 584 | } |
a87e8be2 | 585 | |
f8ff0c06 | 586 | logerror("Protocol error: '%s'", line); |
a87e8be2 LT |
587 | return -1; |
588 | } | |
589 | ||
15515b73 EFL |
590 | static int addrcmp(const struct sockaddr_storage *s1, |
591 | const struct sockaddr_storage *s2) | |
592 | { | |
3aff874a BC |
593 | const struct sockaddr *sa1 = (const struct sockaddr*) s1; |
594 | const struct sockaddr *sa2 = (const struct sockaddr*) s2; | |
595 | ||
596 | if (sa1->sa_family != sa2->sa_family) | |
597 | return sa1->sa_family - sa2->sa_family; | |
598 | if (sa1->sa_family == AF_INET) | |
15515b73 EFL |
599 | return memcmp(&((struct sockaddr_in *)s1)->sin_addr, |
600 | &((struct sockaddr_in *)s2)->sin_addr, | |
601 | sizeof(struct in_addr)); | |
602 | #ifndef NO_IPV6 | |
3aff874a | 603 | if (sa1->sa_family == AF_INET6) |
15515b73 EFL |
604 | return memcmp(&((struct sockaddr_in6 *)s1)->sin6_addr, |
605 | &((struct sockaddr_in6 *)s2)->sin6_addr, | |
606 | sizeof(struct in6_addr)); | |
607 | #endif | |
608 | return 0; | |
609 | } | |
610 | ||
3bd62c21 | 611 | static int max_connections = 32; |
66e631de | 612 | |
3bd62c21 | 613 | static unsigned int live_children; |
66e631de | 614 | |
4d8fa916 | 615 | static struct child { |
3bd62c21 | 616 | struct child *next; |
66e631de | 617 | pid_t pid; |
df076bdb | 618 | struct sockaddr_storage address; |
3bd62c21 | 619 | } *firstborn; |
66e631de | 620 | |
3bd62c21 | 621 | static void add_child(pid_t pid, struct sockaddr *addr, int addrlen) |
66e631de | 622 | { |
460c2010 JH |
623 | struct child *newborn, **cradle; |
624 | ||
460c2010 JH |
625 | newborn = xcalloc(1, sizeof(*newborn)); |
626 | live_children++; | |
627 | newborn->pid = pid; | |
628 | memcpy(&newborn->address, addr, addrlen); | |
629 | for (cradle = &firstborn; *cradle; cradle = &(*cradle)->next) | |
15515b73 | 630 | if (!addrcmp(&(*cradle)->address, &newborn->address)) |
460c2010 JH |
631 | break; |
632 | newborn->next = *cradle; | |
633 | *cradle = newborn; | |
66e631de LT |
634 | } |
635 | ||
3bd62c21 | 636 | static void remove_child(pid_t pid) |
66e631de | 637 | { |
3bd62c21 | 638 | struct child **cradle, *blanket; |
66e631de | 639 | |
3bd62c21 SB |
640 | for (cradle = &firstborn; (blanket = *cradle); cradle = &blanket->next) |
641 | if (blanket->pid == pid) { | |
642 | *cradle = blanket->next; | |
643 | live_children--; | |
644 | free(blanket); | |
645 | break; | |
646 | } | |
66e631de LT |
647 | } |
648 | ||
649 | /* | |
650 | * This gets called if the number of connections grows | |
651 | * past "max_connections". | |
652 | * | |
3bd62c21 | 653 | * We kill the newest connection from a duplicate IP. |
66e631de | 654 | */ |
3bd62c21 | 655 | static void kill_some_child(void) |
66e631de | 656 | { |
460c2010 | 657 | const struct child *blanket, *next; |
66e631de | 658 | |
460c2010 JH |
659 | if (!(blanket = firstborn)) |
660 | return; | |
695605b5 | 661 | |
460c2010 | 662 | for (; (next = blanket->next); blanket = next) |
15515b73 | 663 | if (!addrcmp(&blanket->address, &next->address)) { |
460c2010 JH |
664 | kill(blanket->pid, SIGTERM); |
665 | break; | |
666 | } | |
a5a9126b JS |
667 | } |
668 | ||
3bd62c21 | 669 | static void check_dead_children(void) |
a87e8be2 | 670 | { |
3bd62c21 SB |
671 | int status; |
672 | pid_t pid; | |
02d57da4 | 673 | |
460c2010 | 674 | while ((pid = waitpid(-1, &status, WNOHANG)) > 0) { |
3bd62c21 SB |
675 | const char *dead = ""; |
676 | remove_child(pid); | |
460c2010 | 677 | if (!WIFEXITED(status) || (WEXITSTATUS(status) > 0)) |
3bd62c21 | 678 | dead = " (with error)"; |
85e72830 | 679 | loginfo("[%"PRIuMAX"] Disconnected%s", (uintmax_t)pid, dead); |
02d57da4 LT |
680 | } |
681 | } | |
682 | ||
7fa09084 | 683 | static void handle(int incoming, struct sockaddr *addr, int addrlen) |
02d57da4 | 684 | { |
3bd62c21 | 685 | pid_t pid; |
02d57da4 | 686 | |
3bd62c21 SB |
687 | if (max_connections && live_children >= max_connections) { |
688 | kill_some_child(); | |
460c2010 | 689 | sleep(1); /* give it some time to die */ |
3bd62c21 SB |
690 | check_dead_children(); |
691 | if (live_children >= max_connections) { | |
692 | close(incoming); | |
693 | logerror("Too many children, dropping connection"); | |
694 | return; | |
695 | } | |
696 | } | |
02d57da4 | 697 | |
3bd62c21 | 698 | if ((pid = fork())) { |
02d57da4 | 699 | close(incoming); |
3bd62c21 SB |
700 | if (pid < 0) { |
701 | logerror("Couldn't fork %s", strerror(errno)); | |
02d57da4 | 702 | return; |
3bd62c21 | 703 | } |
02d57da4 | 704 | |
3bd62c21 | 705 | add_child(pid, addr, addrlen); |
a87e8be2 LT |
706 | return; |
707 | } | |
708 | ||
709 | dup2(incoming, 0); | |
710 | dup2(incoming, 1); | |
711 | close(incoming); | |
f8ff0c06 | 712 | |
5b276ee4 | 713 | exit(execute(addr)); |
a87e8be2 LT |
714 | } |
715 | ||
eaa94919 LT |
716 | static void child_handler(int signo) |
717 | { | |
460c2010 JH |
718 | /* |
719 | * Otherwise empty handler because systemcalls will get interrupted | |
695605b5 SB |
720 | * upon signal receipt |
721 | * SysV needs the handler to be rearmed | |
722 | */ | |
bd7b371e | 723 | signal(SIGCHLD, child_handler); |
eaa94919 LT |
724 | } |
725 | ||
1955fabf MW |
726 | static int set_reuse_addr(int sockfd) |
727 | { | |
728 | int on = 1; | |
729 | ||
730 | if (!reuseaddr) | |
731 | return 0; | |
732 | return setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, | |
733 | &on, sizeof(on)); | |
734 | } | |
735 | ||
6573faff PA |
736 | #ifndef NO_IPV6 |
737 | ||
dd467629 | 738 | static int socksetup(char *listen_addr, int listen_port, int **socklist_p) |
a87e8be2 | 739 | { |
df076bdb YH |
740 | int socknum = 0, *socklist = NULL; |
741 | int maxfd = -1; | |
df076bdb | 742 | char pbuf[NI_MAXSERV]; |
6573faff PA |
743 | struct addrinfo hints, *ai0, *ai; |
744 | int gai; | |
20276889 | 745 | long flags; |
df076bdb | 746 | |
dd467629 | 747 | sprintf(pbuf, "%d", listen_port); |
df076bdb YH |
748 | memset(&hints, 0, sizeof(hints)); |
749 | hints.ai_family = AF_UNSPEC; | |
750 | hints.ai_socktype = SOCK_STREAM; | |
751 | hints.ai_protocol = IPPROTO_TCP; | |
752 | hints.ai_flags = AI_PASSIVE; | |
753 | ||
dd467629 | 754 | gai = getaddrinfo(listen_addr, pbuf, &hints, &ai0); |
df076bdb | 755 | if (gai) |
d7530708 | 756 | die("getaddrinfo() failed: %s", gai_strerror(gai)); |
df076bdb | 757 | |
df076bdb YH |
758 | for (ai = ai0; ai; ai = ai->ai_next) { |
759 | int sockfd; | |
df076bdb YH |
760 | |
761 | sockfd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol); | |
762 | if (sockfd < 0) | |
763 | continue; | |
764 | if (sockfd >= FD_SETSIZE) { | |
df0daf8a | 765 | logerror("Socket descriptor too large"); |
df076bdb YH |
766 | close(sockfd); |
767 | continue; | |
768 | } | |
769 | ||
770 | #ifdef IPV6_V6ONLY | |
771 | if (ai->ai_family == AF_INET6) { | |
772 | int on = 1; | |
773 | setsockopt(sockfd, IPPROTO_IPV6, IPV6_V6ONLY, | |
774 | &on, sizeof(on)); | |
775 | /* Note: error is not fatal */ | |
776 | } | |
777 | #endif | |
778 | ||
1955fabf MW |
779 | if (set_reuse_addr(sockfd)) { |
780 | close(sockfd); | |
0032d548 | 781 | continue; |
1955fabf MW |
782 | } |
783 | ||
df076bdb YH |
784 | if (bind(sockfd, ai->ai_addr, ai->ai_addrlen) < 0) { |
785 | close(sockfd); | |
786 | continue; /* not fatal */ | |
787 | } | |
788 | if (listen(sockfd, 5) < 0) { | |
789 | close(sockfd); | |
790 | continue; /* not fatal */ | |
791 | } | |
792 | ||
20276889 AJ |
793 | flags = fcntl(sockfd, F_GETFD, 0); |
794 | if (flags >= 0) | |
795 | fcntl(sockfd, F_SETFD, flags | FD_CLOEXEC); | |
796 | ||
83572c1a | 797 | socklist = xrealloc(socklist, sizeof(int) * (socknum + 1)); |
df076bdb YH |
798 | socklist[socknum++] = sockfd; |
799 | ||
df076bdb YH |
800 | if (maxfd < sockfd) |
801 | maxfd = sockfd; | |
802 | } | |
803 | ||
804 | freeaddrinfo(ai0); | |
805 | ||
6573faff PA |
806 | *socklist_p = socklist; |
807 | return socknum; | |
808 | } | |
809 | ||
810 | #else /* NO_IPV6 */ | |
811 | ||
100690b6 | 812 | static int socksetup(char *listen_addr, int listen_port, int **socklist_p) |
6573faff PA |
813 | { |
814 | struct sockaddr_in sin; | |
815 | int sockfd; | |
20276889 | 816 | long flags; |
6573faff | 817 | |
dd467629 JL |
818 | memset(&sin, 0, sizeof sin); |
819 | sin.sin_family = AF_INET; | |
820 | sin.sin_port = htons(listen_port); | |
821 | ||
822 | if (listen_addr) { | |
823 | /* Well, host better be an IP address here. */ | |
824 | if (inet_pton(AF_INET, listen_addr, &sin.sin_addr.s_addr) <= 0) | |
825 | return 0; | |
826 | } else { | |
827 | sin.sin_addr.s_addr = htonl(INADDR_ANY); | |
828 | } | |
829 | ||
6573faff PA |
830 | sockfd = socket(AF_INET, SOCK_STREAM, 0); |
831 | if (sockfd < 0) | |
832 | return 0; | |
833 | ||
1955fabf MW |
834 | if (set_reuse_addr(sockfd)) { |
835 | close(sockfd); | |
836 | return 0; | |
837 | } | |
838 | ||
6573faff PA |
839 | if ( bind(sockfd, (struct sockaddr *)&sin, sizeof sin) < 0 ) { |
840 | close(sockfd); | |
841 | return 0; | |
842 | } | |
a87e8be2 | 843 | |
f35230fb PS |
844 | if (listen(sockfd, 5) < 0) { |
845 | close(sockfd); | |
846 | return 0; | |
847 | } | |
848 | ||
20276889 AJ |
849 | flags = fcntl(sockfd, F_GETFD, 0); |
850 | if (flags >= 0) | |
851 | fcntl(sockfd, F_SETFD, flags | FD_CLOEXEC); | |
852 | ||
1b4713fb | 853 | *socklist_p = xmalloc(sizeof(int)); |
6573faff | 854 | **socklist_p = sockfd; |
f35230fb | 855 | return 1; |
6573faff PA |
856 | } |
857 | ||
858 | #endif | |
859 | ||
860 | static int service_loop(int socknum, int *socklist) | |
861 | { | |
862 | struct pollfd *pfd; | |
863 | int i; | |
864 | ||
695605b5 | 865 | pfd = xcalloc(socknum, sizeof(struct pollfd)); |
6573faff PA |
866 | |
867 | for (i = 0; i < socknum; i++) { | |
868 | pfd[i].fd = socklist[i]; | |
869 | pfd[i].events = POLLIN; | |
870 | } | |
9220282a PA |
871 | |
872 | signal(SIGCHLD, child_handler); | |
a87e8be2 LT |
873 | |
874 | for (;;) { | |
df076bdb | 875 | int i; |
6573faff | 876 | |
695605b5 SB |
877 | check_dead_children(); |
878 | ||
879 | if (poll(pfd, socknum, -1) < 0) { | |
1eef0b33 | 880 | if (errno != EINTR) { |
df0daf8a | 881 | logerror("Poll failed, resuming: %s", |
1eef0b33 JH |
882 | strerror(errno)); |
883 | sleep(1); | |
884 | } | |
df076bdb YH |
885 | continue; |
886 | } | |
887 | ||
888 | for (i = 0; i < socknum; i++) { | |
6573faff | 889 | if (pfd[i].revents & POLLIN) { |
df076bdb | 890 | struct sockaddr_storage ss; |
7626e49e | 891 | unsigned int sslen = sizeof(ss); |
6573faff | 892 | int incoming = accept(pfd[i].fd, (struct sockaddr *)&ss, &sslen); |
df076bdb YH |
893 | if (incoming < 0) { |
894 | switch (errno) { | |
895 | case EAGAIN: | |
896 | case EINTR: | |
897 | case ECONNABORTED: | |
898 | continue; | |
899 | default: | |
d824cbba | 900 | die_errno("accept returned"); |
df076bdb YH |
901 | } |
902 | } | |
903 | handle(incoming, (struct sockaddr *)&ss, sslen); | |
a87e8be2 LT |
904 | } |
905 | } | |
a87e8be2 LT |
906 | } |
907 | } | |
908 | ||
258e93a1 ML |
909 | /* if any standard file descriptor is missing open it to /dev/null */ |
910 | static void sanitize_stdfds(void) | |
911 | { | |
912 | int fd = open("/dev/null", O_RDWR, 0); | |
913 | while (fd != -1 && fd < 2) | |
914 | fd = dup(fd); | |
915 | if (fd == -1) | |
d824cbba | 916 | die_errno("open /dev/null or dup failed"); |
258e93a1 ML |
917 | if (fd > 2) |
918 | close(fd); | |
919 | } | |
920 | ||
a5262768 ML |
921 | static void daemonize(void) |
922 | { | |
923 | switch (fork()) { | |
924 | case 0: | |
925 | break; | |
926 | case -1: | |
d824cbba | 927 | die_errno("fork failed"); |
a5262768 ML |
928 | default: |
929 | exit(0); | |
930 | } | |
931 | if (setsid() == -1) | |
d824cbba | 932 | die_errno("setsid failed"); |
a5262768 ML |
933 | close(0); |
934 | close(1); | |
935 | close(2); | |
936 | sanitize_stdfds(); | |
937 | } | |
938 | ||
45ed5d7f ML |
939 | static void store_pid(const char *path) |
940 | { | |
941 | FILE *f = fopen(path, "w"); | |
942 | if (!f) | |
d824cbba | 943 | die_errno("cannot open pid file '%s'", path); |
85e72830 | 944 | if (fprintf(f, "%"PRIuMAX"\n", (uintmax_t) getpid()) < 0 || fclose(f) != 0) |
d824cbba | 945 | die_errno("failed to write pid file '%s'", path); |
45ed5d7f ML |
946 | } |
947 | ||
dd467629 | 948 | static int serve(char *listen_addr, int listen_port, struct passwd *pass, gid_t gid) |
6573faff PA |
949 | { |
950 | int socknum, *socklist; | |
4ae22d96 | 951 | |
dd467629 | 952 | socknum = socksetup(listen_addr, listen_port, &socklist); |
6573faff | 953 | if (socknum == 0) |
dd467629 JL |
954 | die("unable to allocate any listen sockets on host %s port %u", |
955 | listen_addr, listen_port); | |
4ae22d96 | 956 | |
678dac6b TS |
957 | if (pass && gid && |
958 | (initgroups(pass->pw_name, gid) || setgid (gid) || | |
959 | setuid(pass->pw_uid))) | |
960 | die("cannot drop privileges"); | |
961 | ||
6573faff | 962 | return service_loop(socknum, socklist); |
4ae22d96 | 963 | } |
6573faff | 964 | |
a87e8be2 LT |
965 | int main(int argc, char **argv) |
966 | { | |
dd467629 JL |
967 | int listen_port = 0; |
968 | char *listen_addr = NULL; | |
e64e1b79 | 969 | int inetd_mode = 0; |
678dac6b | 970 | const char *pid_file = NULL, *user_name = NULL, *group_name = NULL; |
a5262768 | 971 | int detach = 0; |
678dac6b TS |
972 | struct passwd *pass = NULL; |
973 | struct group *group; | |
974 | gid_t gid = 0; | |
a87e8be2 LT |
975 | int i; |
976 | ||
2fb3f6db SP |
977 | git_extract_argv0_path(argv[0]); |
978 | ||
a87e8be2 LT |
979 | for (i = 1; i < argc; i++) { |
980 | char *arg = argv[i]; | |
981 | ||
cc44c765 | 982 | if (!prefixcmp(arg, "--listen=")) { |
6720e95b RS |
983 | listen_addr = xstrdup_tolower(arg + 9); |
984 | continue; | |
dd467629 | 985 | } |
cc44c765 | 986 | if (!prefixcmp(arg, "--port=")) { |
a87e8be2 LT |
987 | char *end; |
988 | unsigned long n; | |
989 | n = strtoul(arg+7, &end, 0); | |
990 | if (arg[7] && !*end) { | |
dd467629 | 991 | listen_port = n; |
a87e8be2 LT |
992 | continue; |
993 | } | |
994 | } | |
e64e1b79 LT |
995 | if (!strcmp(arg, "--inetd")) { |
996 | inetd_mode = 1; | |
a8883288 | 997 | log_syslog = 1; |
e64e1b79 LT |
998 | continue; |
999 | } | |
f8ff0c06 PB |
1000 | if (!strcmp(arg, "--verbose")) { |
1001 | verbose = 1; | |
1002 | continue; | |
1003 | } | |
9048fe1c PB |
1004 | if (!strcmp(arg, "--syslog")) { |
1005 | log_syslog = 1; | |
9048fe1c PB |
1006 | continue; |
1007 | } | |
4ae95682 PA |
1008 | if (!strcmp(arg, "--export-all")) { |
1009 | export_all_trees = 1; | |
1010 | continue; | |
1011 | } | |
cc44c765 | 1012 | if (!prefixcmp(arg, "--timeout=")) { |
960deccb | 1013 | timeout = atoi(arg+10); |
a8883288 | 1014 | continue; |
960deccb | 1015 | } |
cc44c765 | 1016 | if (!prefixcmp(arg, "--init-timeout=")) { |
960deccb | 1017 | init_timeout = atoi(arg+15); |
a8883288 | 1018 | continue; |
960deccb | 1019 | } |
3bd62c21 SB |
1020 | if (!prefixcmp(arg, "--max-connections=")) { |
1021 | max_connections = atoi(arg+18); | |
1022 | if (max_connections < 0) | |
1023 | max_connections = 0; /* unlimited */ | |
1024 | continue; | |
1025 | } | |
4dbd1352 AE |
1026 | if (!strcmp(arg, "--strict-paths")) { |
1027 | strict_paths = 1; | |
1028 | continue; | |
1029 | } | |
cc44c765 | 1030 | if (!prefixcmp(arg, "--base-path=")) { |
b21c31c9 PB |
1031 | base_path = arg+12; |
1032 | continue; | |
1033 | } | |
73a7a656 JA |
1034 | if (!strcmp(arg, "--base-path-relaxed")) { |
1035 | base_path_relaxed = 1; | |
1036 | continue; | |
1037 | } | |
cc44c765 | 1038 | if (!prefixcmp(arg, "--interpolated-path=")) { |
49ba83fb JL |
1039 | interpolated_path = arg+20; |
1040 | continue; | |
1041 | } | |
1955fabf MW |
1042 | if (!strcmp(arg, "--reuseaddr")) { |
1043 | reuseaddr = 1; | |
1044 | continue; | |
1045 | } | |
603968d2 JH |
1046 | if (!strcmp(arg, "--user-path")) { |
1047 | user_path = ""; | |
1048 | continue; | |
1049 | } | |
cc44c765 | 1050 | if (!prefixcmp(arg, "--user-path=")) { |
603968d2 JH |
1051 | user_path = arg + 12; |
1052 | continue; | |
1053 | } | |
cc44c765 | 1054 | if (!prefixcmp(arg, "--pid-file=")) { |
45ed5d7f ML |
1055 | pid_file = arg + 11; |
1056 | continue; | |
1057 | } | |
a5262768 ML |
1058 | if (!strcmp(arg, "--detach")) { |
1059 | detach = 1; | |
1060 | log_syslog = 1; | |
1061 | continue; | |
1062 | } | |
cc44c765 | 1063 | if (!prefixcmp(arg, "--user=")) { |
678dac6b TS |
1064 | user_name = arg + 7; |
1065 | continue; | |
1066 | } | |
cc44c765 | 1067 | if (!prefixcmp(arg, "--group=")) { |
678dac6b TS |
1068 | group_name = arg + 8; |
1069 | continue; | |
1070 | } | |
cc44c765 | 1071 | if (!prefixcmp(arg, "--enable=")) { |
d819e4e6 JH |
1072 | enable_service(arg + 9, 1); |
1073 | continue; | |
1074 | } | |
cc44c765 | 1075 | if (!prefixcmp(arg, "--disable=")) { |
d819e4e6 JH |
1076 | enable_service(arg + 10, 0); |
1077 | continue; | |
1078 | } | |
cc44c765 | 1079 | if (!prefixcmp(arg, "--allow-override=")) { |
74c0cc21 | 1080 | make_service_overridable(arg + 17, 1); |
d819e4e6 JH |
1081 | continue; |
1082 | } | |
cc44c765 | 1083 | if (!prefixcmp(arg, "--forbid-override=")) { |
74c0cc21 | 1084 | make_service_overridable(arg + 18, 0); |
d819e4e6 JH |
1085 | continue; |
1086 | } | |
4ae95682 PA |
1087 | if (!strcmp(arg, "--")) { |
1088 | ok_paths = &argv[i+1]; | |
1089 | break; | |
1090 | } else if (arg[0] != '-') { | |
1091 | ok_paths = &argv[i]; | |
1092 | break; | |
1093 | } | |
e64e1b79 | 1094 | |
a87e8be2 LT |
1095 | usage(daemon_usage); |
1096 | } | |
1097 | ||
22665bba | 1098 | if (log_syslog) { |
6a992e9e | 1099 | openlog("git-daemon", LOG_PID, LOG_DAEMON); |
22665bba | 1100 | set_die_routine(daemon_die); |
460c2010 | 1101 | } else |
48196afd JH |
1102 | /* avoid splitting a message in the middle */ |
1103 | setvbuf(stderr, NULL, _IOLBF, 0); | |
22665bba | 1104 | |
678dac6b TS |
1105 | if (inetd_mode && (group_name || user_name)) |
1106 | die("--user and --group are incompatible with --inetd"); | |
1107 | ||
dd467629 JL |
1108 | if (inetd_mode && (listen_port || listen_addr)) |
1109 | die("--listen= and --port= are incompatible with --inetd"); | |
1110 | else if (listen_port == 0) | |
1111 | listen_port = DEFAULT_GIT_PORT; | |
1112 | ||
678dac6b TS |
1113 | if (group_name && !user_name) |
1114 | die("--group supplied without --user"); | |
1115 | ||
1116 | if (user_name) { | |
1117 | pass = getpwnam(user_name); | |
1118 | if (!pass) | |
1119 | die("user not found - %s", user_name); | |
1120 | ||
1121 | if (!group_name) | |
1122 | gid = pass->pw_gid; | |
1123 | else { | |
1124 | group = getgrnam(group_name); | |
1125 | if (!group) | |
1126 | die("group not found - %s", group_name); | |
1127 | ||
1128 | gid = group->gr_gid; | |
1129 | } | |
1130 | } | |
1131 | ||
ad8b4f56 ML |
1132 | if (strict_paths && (!ok_paths || !*ok_paths)) |
1133 | die("option --strict-paths requires a whitelist"); | |
1134 | ||
90b4a71c JH |
1135 | if (base_path && !is_directory(base_path)) |
1136 | die("base-path '%s' does not exist or is not a directory", | |
1137 | base_path); | |
20632071 | 1138 | |
7c3693f1 | 1139 | if (inetd_mode) { |
5b276ee4 DW |
1140 | struct sockaddr_storage ss; |
1141 | struct sockaddr *peer = (struct sockaddr *)&ss; | |
1142 | socklen_t slen = sizeof(ss); | |
1143 | ||
c569b1fe | 1144 | if (!freopen("/dev/null", "w", stderr)) |
d824cbba | 1145 | die_errno("failed to redirect stderr to /dev/null"); |
5b276ee4 DW |
1146 | |
1147 | if (getpeername(0, peer, &slen)) | |
1148 | peer = NULL; | |
1149 | ||
1150 | return execute(peer); | |
7c3693f1 | 1151 | } |
bce8230d | 1152 | |
6a992e9e | 1153 | if (detach) { |
a5262768 | 1154 | daemonize(); |
6a992e9e SB |
1155 | loginfo("Ready to rumble"); |
1156 | } | |
a5262768 ML |
1157 | else |
1158 | sanitize_stdfds(); | |
258e93a1 | 1159 | |
45ed5d7f ML |
1160 | if (pid_file) |
1161 | store_pid(pid_file); | |
1162 | ||
dd467629 | 1163 | return serve(listen_addr, listen_port, pass, gid); |
a87e8be2 | 1164 | } |