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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 | ||
cdda4745 | 80 | static void logerror(const char *err, ...) |
f8ff0c06 PB |
81 | { |
82 | va_list params; | |
83 | va_start(params, err); | |
9048fe1c | 84 | logreport(LOG_ERR, err, params); |
f8ff0c06 PB |
85 | va_end(params); |
86 | } | |
87 | ||
cdda4745 | 88 | static void loginfo(const char *err, ...) |
f8ff0c06 PB |
89 | { |
90 | va_list params; | |
91 | if (!verbose) | |
92 | return; | |
93 | va_start(params, err); | |
9048fe1c | 94 | logreport(LOG_INFO, err, params); |
f8ff0c06 PB |
95 | va_end(params); |
96 | } | |
a87e8be2 | 97 | |
ad8b4f56 ML |
98 | static void NORETURN daemon_die(const char *err, va_list params) |
99 | { | |
100 | logreport(LOG_ERR, err, params); | |
101 | exit(1); | |
102 | } | |
103 | ||
d79374c7 JH |
104 | static int avoid_alias(char *p) |
105 | { | |
106 | int sl, ndot; | |
107 | ||
a6080a0a | 108 | /* |
d79374c7 JH |
109 | * This resurrects the belts and suspenders paranoia check by HPA |
110 | * done in <435560F7.4080006@zytor.com> thread, now enter_repo() | |
111 | * does not do getcwd() based path canonicalizations. | |
112 | * | |
113 | * sl becomes true immediately after seeing '/' and continues to | |
114 | * be true as long as dots continue after that without intervening | |
115 | * non-dot character. | |
116 | */ | |
117 | if (!p || (*p != '/' && *p != '~')) | |
118 | return -1; | |
119 | sl = 1; ndot = 0; | |
120 | p++; | |
121 | ||
122 | while (1) { | |
123 | char ch = *p++; | |
124 | if (sl) { | |
125 | if (ch == '.') | |
126 | ndot++; | |
127 | else if (ch == '/') { | |
128 | if (ndot < 3) | |
129 | /* reject //, /./ and /../ */ | |
130 | return -1; | |
131 | ndot = 0; | |
132 | } | |
133 | else if (ch == 0) { | |
134 | if (0 < ndot && ndot < 3) | |
135 | /* reject /.$ and /..$ */ | |
136 | return -1; | |
137 | return 0; | |
138 | } | |
139 | else | |
140 | sl = ndot = 0; | |
141 | } | |
142 | else if (ch == 0) | |
143 | return 0; | |
144 | else if (ch == '/') { | |
145 | sl = 1; | |
146 | ndot = 0; | |
147 | } | |
148 | } | |
149 | } | |
150 | ||
a47551c3 | 151 | static char *path_ok(char *directory) |
4ae95682 | 152 | { |
603968d2 | 153 | static char rpath[PATH_MAX]; |
49ba83fb | 154 | static char interp_path[PATH_MAX]; |
d79374c7 | 155 | char *path; |
49ba83fb JL |
156 | char *dir; |
157 | ||
9d7ca667 | 158 | dir = directory; |
d79374c7 JH |
159 | |
160 | if (avoid_alias(dir)) { | |
161 | logerror("'%s': aliased", dir); | |
162 | return NULL; | |
163 | } | |
164 | ||
603968d2 JH |
165 | if (*dir == '~') { |
166 | if (!user_path) { | |
167 | logerror("'%s': User-path not allowed", dir); | |
168 | return NULL; | |
169 | } | |
170 | if (*user_path) { | |
171 | /* Got either "~alice" or "~alice/foo"; | |
172 | * rewrite them to "~alice/%s" or | |
173 | * "~alice/%s/foo". | |
174 | */ | |
175 | int namlen, restlen = strlen(dir); | |
176 | char *slash = strchr(dir, '/'); | |
177 | if (!slash) | |
178 | slash = dir + restlen; | |
179 | namlen = slash - dir; | |
180 | restlen -= namlen; | |
181 | loginfo("userpath <%s>, request <%s>, namlen %d, restlen %d, slash <%s>", user_path, dir, namlen, restlen, slash); | |
182 | snprintf(rpath, PATH_MAX, "%.*s/%s%.*s", | |
183 | namlen, dir, user_path, restlen, slash); | |
184 | dir = rpath; | |
185 | } | |
186 | } | |
49ba83fb | 187 | else if (interpolated_path && saw_extended_args) { |
9d7ca667 RS |
188 | struct strbuf expanded_path = STRBUF_INIT; |
189 | struct strbuf_expand_dict_entry dict[] = { | |
190 | { "H", hostname }, | |
191 | { "CH", canon_hostname }, | |
192 | { "IP", ip_address }, | |
193 | { "P", tcp_port }, | |
194 | { "D", directory }, | |
195 | { "%", "%" }, | |
196 | { NULL } | |
197 | }; | |
198 | ||
49ba83fb JL |
199 | if (*dir != '/') { |
200 | /* Allow only absolute */ | |
201 | logerror("'%s': Non-absolute path denied (interpolated-path active)", dir); | |
202 | return NULL; | |
203 | } | |
204 | ||
9d7ca667 RS |
205 | strbuf_expand(&expanded_path, interpolated_path, |
206 | strbuf_expand_dict_cb, &dict); | |
207 | strlcpy(interp_path, expanded_path.buf, PATH_MAX); | |
208 | strbuf_release(&expanded_path); | |
49ba83fb JL |
209 | loginfo("Interpolated dir '%s'", interp_path); |
210 | ||
211 | dir = interp_path; | |
212 | } | |
603968d2 JH |
213 | else if (base_path) { |
214 | if (*dir != '/') { | |
215 | /* Allow only absolute */ | |
1fda3d55 | 216 | logerror("'%s': Non-absolute path denied (base-path active)", dir); |
b21c31c9 PB |
217 | return NULL; |
218 | } | |
49ba83fb JL |
219 | snprintf(rpath, PATH_MAX, "%s%s", base_path, dir); |
220 | dir = rpath; | |
b21c31c9 PB |
221 | } |
222 | ||
a583971f RS |
223 | path = enter_repo(dir, strict_paths); |
224 | if (!path && base_path && base_path_relaxed) { | |
73a7a656 JA |
225 | /* |
226 | * if we fail and base_path_relaxed is enabled, try without | |
227 | * prefixing the base path | |
228 | */ | |
a583971f RS |
229 | dir = directory; |
230 | path = enter_repo(dir, strict_paths); | |
231 | } | |
3e04c62d | 232 | |
4dbd1352 | 233 | if (!path) { |
05ac6b34 | 234 | logerror("'%s' does not appear to be a git repository", dir); |
4dbd1352 | 235 | return NULL; |
4ae95682 PA |
236 | } |
237 | ||
238 | if ( ok_paths && *ok_paths ) { | |
ce335fe0 | 239 | char **pp; |
4dbd1352 | 240 | int pathlen = strlen(path); |
4ae95682 | 241 | |
ce335fe0 | 242 | /* The validation is done on the paths after enter_repo |
a6080a0a | 243 | * appends optional {.git,.git/.git} and friends, but |
d79374c7 JH |
244 | * it does not use getcwd(). So if your /pub is |
245 | * a symlink to /mnt/pub, you can whitelist /pub and | |
246 | * do not have to say /mnt/pub. | |
247 | * Do not say /pub/. | |
ce335fe0 | 248 | */ |
4ae95682 PA |
249 | for ( pp = ok_paths ; *pp ; pp++ ) { |
250 | int len = strlen(*pp); | |
ce335fe0 JH |
251 | if (len <= pathlen && |
252 | !memcmp(*pp, path, len) && | |
253 | (path[len] == '\0' || | |
254 | (!strict_paths && path[len] == '/'))) | |
255 | return path; | |
4ae95682 | 256 | } |
4dbd1352 AE |
257 | } |
258 | else { | |
259 | /* be backwards compatible */ | |
260 | if (!strict_paths) | |
261 | return path; | |
4ae95682 PA |
262 | } |
263 | ||
4dbd1352 AE |
264 | logerror("'%s': not in whitelist", path); |
265 | return NULL; /* Fallthrough. Deny by default */ | |
4ae95682 | 266 | } |
a87e8be2 | 267 | |
d819e4e6 JH |
268 | typedef int (*daemon_service_fn)(void); |
269 | struct daemon_service { | |
270 | const char *name; | |
271 | const char *config_name; | |
272 | daemon_service_fn fn; | |
273 | int enabled; | |
274 | int overridable; | |
275 | }; | |
276 | ||
277 | static struct daemon_service *service_looking_at; | |
278 | static int service_enabled; | |
279 | ||
ef90d6d4 | 280 | static int git_daemon_config(const char *var, const char *value, void *cb) |
d819e4e6 | 281 | { |
cc44c765 | 282 | if (!prefixcmp(var, "daemon.") && |
d819e4e6 JH |
283 | !strcmp(var + 7, service_looking_at->config_name)) { |
284 | service_enabled = git_config_bool(var, value); | |
285 | return 0; | |
286 | } | |
287 | ||
288 | /* we are not interested in parsing any other configuration here */ | |
289 | return 0; | |
290 | } | |
291 | ||
a47551c3 | 292 | static int run_service(char *dir, struct daemon_service *service) |
a87e8be2 | 293 | { |
4dbd1352 | 294 | const char *path; |
d819e4e6 JH |
295 | int enabled = service->enabled; |
296 | ||
a47551c3 | 297 | loginfo("Request %s for '%s'", service->name, dir); |
4dbd1352 | 298 | |
d819e4e6 JH |
299 | if (!enabled && !service->overridable) { |
300 | logerror("'%s': service not enabled.", service->name); | |
301 | errno = EACCES; | |
302 | return -1; | |
303 | } | |
4ae95682 | 304 | |
a47551c3 | 305 | if (!(path = path_ok(dir))) |
a87e8be2 | 306 | return -1; |
47888f0f | 307 | |
a87e8be2 LT |
308 | /* |
309 | * Security on the cheap. | |
310 | * | |
a935c397 | 311 | * We want a readable HEAD, usable "objects" directory, and |
a87e8be2 LT |
312 | * a "git-daemon-export-ok" flag that says that the other side |
313 | * is ok with us doing this. | |
4dbd1352 AE |
314 | * |
315 | * path_ok() uses enter_repo() and does whitelist checking. | |
316 | * We only need to make sure the repository is exported. | |
a87e8be2 | 317 | */ |
4dbd1352 | 318 | |
3e04c62d | 319 | if (!export_all_trees && access("git-daemon-export-ok", F_OK)) { |
4dbd1352 | 320 | logerror("'%s': repository not exported.", path); |
3e04c62d PA |
321 | errno = EACCES; |
322 | return -1; | |
323 | } | |
324 | ||
d819e4e6 JH |
325 | if (service->overridable) { |
326 | service_looking_at = service; | |
327 | service_enabled = -1; | |
ef90d6d4 | 328 | git_config(git_daemon_config, NULL); |
d819e4e6 JH |
329 | if (0 <= service_enabled) |
330 | enabled = service_enabled; | |
331 | } | |
332 | if (!enabled) { | |
333 | logerror("'%s': service not enabled for '%s'", | |
334 | service->name, path); | |
335 | errno = EACCES; | |
336 | return -1; | |
337 | } | |
338 | ||
02d57da4 LT |
339 | /* |
340 | * We'll ignore SIGTERM from now on, we have a | |
341 | * good client. | |
342 | */ | |
343 | signal(SIGTERM, SIG_IGN); | |
344 | ||
d819e4e6 JH |
345 | return service->fn(); |
346 | } | |
347 | ||
5d87dd4f JS |
348 | static void copy_to_log(int fd) |
349 | { | |
350 | struct strbuf line = STRBUF_INIT; | |
351 | FILE *fp; | |
352 | ||
353 | fp = fdopen(fd, "r"); | |
354 | if (fp == NULL) { | |
355 | logerror("fdopen of error channel failed"); | |
356 | close(fd); | |
357 | return; | |
358 | } | |
359 | ||
360 | while (strbuf_getline(&line, fp, '\n') != EOF) { | |
361 | logerror("%s", line.buf); | |
362 | strbuf_setlen(&line, 0); | |
363 | } | |
364 | ||
365 | strbuf_release(&line); | |
366 | fclose(fp); | |
367 | } | |
368 | ||
369 | static int run_service_command(const char **argv) | |
370 | { | |
371 | struct child_process cld; | |
372 | ||
373 | memset(&cld, 0, sizeof(cld)); | |
374 | cld.argv = argv; | |
375 | cld.git_cmd = 1; | |
376 | cld.err = -1; | |
377 | if (start_command(&cld)) | |
378 | return -1; | |
379 | ||
380 | close(0); | |
381 | close(1); | |
382 | ||
383 | copy_to_log(cld.err); | |
384 | ||
385 | return finish_command(&cld); | |
386 | } | |
387 | ||
d819e4e6 JH |
388 | static int upload_pack(void) |
389 | { | |
390 | /* Timeout as string */ | |
391 | char timeout_buf[64]; | |
5d87dd4f | 392 | const char *argv[] = { "upload-pack", "--strict", timeout_buf, ".", NULL }; |
d819e4e6 | 393 | |
960deccb | 394 | snprintf(timeout_buf, sizeof timeout_buf, "--timeout=%u", timeout); |
5d87dd4f | 395 | return run_service_command(argv); |
a87e8be2 LT |
396 | } |
397 | ||
39345a21 FBH |
398 | static int upload_archive(void) |
399 | { | |
5d87dd4f JS |
400 | static const char *argv[] = { "upload-archive", ".", NULL }; |
401 | return run_service_command(argv); | |
39345a21 FBH |
402 | } |
403 | ||
4b3b1e1e LT |
404 | static int receive_pack(void) |
405 | { | |
5d87dd4f JS |
406 | static const char *argv[] = { "receive-pack", ".", NULL }; |
407 | return run_service_command(argv); | |
4b3b1e1e LT |
408 | } |
409 | ||
d819e4e6 | 410 | static struct daemon_service daemon_service[] = { |
39345a21 | 411 | { "upload-archive", "uploadarch", upload_archive, 0, 1 }, |
d819e4e6 | 412 | { "upload-pack", "uploadpack", upload_pack, 1, 1 }, |
4b3b1e1e | 413 | { "receive-pack", "receivepack", receive_pack, 0, 1 }, |
d819e4e6 JH |
414 | }; |
415 | ||
f3fa1838 JH |
416 | static void enable_service(const char *name, int ena) |
417 | { | |
d819e4e6 JH |
418 | int i; |
419 | for (i = 0; i < ARRAY_SIZE(daemon_service); i++) { | |
420 | if (!strcmp(daemon_service[i].name, name)) { | |
421 | daemon_service[i].enabled = ena; | |
422 | return; | |
423 | } | |
424 | } | |
425 | die("No such service %s", name); | |
426 | } | |
427 | ||
f3fa1838 JH |
428 | static void make_service_overridable(const char *name, int ena) |
429 | { | |
d819e4e6 JH |
430 | int i; |
431 | for (i = 0; i < ARRAY_SIZE(daemon_service); i++) { | |
432 | if (!strcmp(daemon_service[i].name, name)) { | |
433 | daemon_service[i].overridable = ena; | |
434 | return; | |
435 | } | |
436 | } | |
437 | die("No such service %s", name); | |
438 | } | |
439 | ||
6720e95b RS |
440 | static char *xstrdup_tolower(const char *str) |
441 | { | |
442 | char *p, *dup = xstrdup(str); | |
443 | for (p = dup; *p; p++) | |
444 | *p = tolower(*p); | |
445 | return dup; | |
446 | } | |
447 | ||
eb30aed7 | 448 | /* |
73bb33a9 | 449 | * Read the host as supplied by the client connection. |
eb30aed7 | 450 | */ |
73bb33a9 | 451 | static void parse_host_arg(char *extra_args, int buflen) |
49ba83fb JL |
452 | { |
453 | char *val; | |
454 | int vallen; | |
455 | char *end = extra_args + buflen; | |
456 | ||
73bb33a9 | 457 | if (extra_args < end && *extra_args) { |
49ba83fb JL |
458 | saw_extended_args = 1; |
459 | if (strncasecmp("host=", extra_args, 5) == 0) { | |
460 | val = extra_args + 5; | |
461 | vallen = strlen(val) + 1; | |
462 | if (*val) { | |
eb30aed7 JL |
463 | /* Split <host>:<port> at colon. */ |
464 | char *host = val; | |
465 | char *port = strrchr(host, ':'); | |
dd467629 JL |
466 | if (port) { |
467 | *port = 0; | |
468 | port++; | |
9d7ca667 RS |
469 | free(tcp_port); |
470 | tcp_port = xstrdup(port); | |
dd467629 | 471 | } |
9d7ca667 | 472 | free(hostname); |
6720e95b | 473 | hostname = xstrdup_tolower(host); |
49ba83fb | 474 | } |
eb30aed7 | 475 | |
49ba83fb JL |
476 | /* On to the next one */ |
477 | extra_args = val + vallen; | |
478 | } | |
73bb33a9 SP |
479 | if (extra_args < end && *extra_args) |
480 | die("Invalid request"); | |
49ba83fb | 481 | } |
dd467629 | 482 | |
dd467629 JL |
483 | /* |
484 | * Locate canonical hostname and its IP address. | |
485 | */ | |
6720e95b | 486 | if (hostname) { |
dd467629 | 487 | #ifndef NO_IPV6 |
dd467629 | 488 | struct addrinfo hints; |
3e8a00ae | 489 | struct addrinfo *ai; |
dd467629 JL |
490 | int gai; |
491 | static char addrbuf[HOST_NAME_MAX + 1]; | |
492 | ||
493 | memset(&hints, 0, sizeof(hints)); | |
494 | hints.ai_flags = AI_CANONNAME; | |
495 | ||
2af202be | 496 | gai = getaddrinfo(hostname, NULL, &hints, &ai); |
dd467629 | 497 | if (!gai) { |
3e8a00ae BK |
498 | struct sockaddr_in *sin_addr = (void *)ai->ai_addr; |
499 | ||
500 | inet_ntop(AF_INET, &sin_addr->sin_addr, | |
501 | addrbuf, sizeof(addrbuf)); | |
502 | free(ip_address); | |
503 | ip_address = xstrdup(addrbuf); | |
504 | ||
505 | free(canon_hostname); | |
506 | canon_hostname = xstrdup(ai->ai_canonname ? | |
507 | ai->ai_canonname : ip_address); | |
508 | ||
509 | freeaddrinfo(ai); | |
dd467629 | 510 | } |
dd467629 | 511 | #else |
dd467629 JL |
512 | struct hostent *hent; |
513 | struct sockaddr_in sa; | |
514 | char **ap; | |
515 | static char addrbuf[HOST_NAME_MAX + 1]; | |
516 | ||
9d7ca667 | 517 | hent = gethostbyname(hostname); |
dd467629 JL |
518 | |
519 | ap = hent->h_addr_list; | |
520 | memset(&sa, 0, sizeof sa); | |
521 | sa.sin_family = hent->h_addrtype; | |
522 | sa.sin_port = htons(0); | |
523 | memcpy(&sa.sin_addr, *ap, hent->h_length); | |
524 | ||
525 | inet_ntop(hent->h_addrtype, &sa.sin_addr, | |
526 | addrbuf, sizeof(addrbuf)); | |
eb30aed7 | 527 | |
9d7ca667 RS |
528 | free(canon_hostname); |
529 | canon_hostname = xstrdup(hent->h_name); | |
530 | free(ip_address); | |
531 | ip_address = xstrdup(addrbuf); | |
dd467629 | 532 | #endif |
6720e95b | 533 | } |
dd467629 JL |
534 | } |
535 | ||
536 | ||
5b276ee4 | 537 | static int execute(struct sockaddr *addr) |
a87e8be2 | 538 | { |
7d80694a | 539 | static char line[1000]; |
d819e4e6 | 540 | int pktlen, len, i; |
7d80694a | 541 | |
5b276ee4 DW |
542 | if (addr) { |
543 | char addrbuf[256] = ""; | |
544 | int port = -1; | |
545 | ||
546 | if (addr->sa_family == AF_INET) { | |
547 | struct sockaddr_in *sin_addr = (void *) addr; | |
548 | inet_ntop(addr->sa_family, &sin_addr->sin_addr, addrbuf, sizeof(addrbuf)); | |
c67359be | 549 | port = ntohs(sin_addr->sin_port); |
5b276ee4 DW |
550 | #ifndef NO_IPV6 |
551 | } else if (addr && addr->sa_family == AF_INET6) { | |
552 | struct sockaddr_in6 *sin6_addr = (void *) addr; | |
553 | ||
554 | char *buf = addrbuf; | |
555 | *buf++ = '['; *buf = '\0'; /* stpcpy() is cool */ | |
556 | inet_ntop(AF_INET6, &sin6_addr->sin6_addr, buf, sizeof(addrbuf) - 1); | |
557 | strcat(buf, "]"); | |
558 | ||
c67359be | 559 | port = ntohs(sin6_addr->sin6_port); |
5b276ee4 DW |
560 | #endif |
561 | } | |
562 | loginfo("Connection from %s:%d", addrbuf, port); | |
53ffb878 JH |
563 | setenv("REMOTE_ADDR", addrbuf, 1); |
564 | } | |
565 | else { | |
566 | unsetenv("REMOTE_ADDR"); | |
5b276ee4 DW |
567 | } |
568 | ||
960deccb | 569 | alarm(init_timeout ? init_timeout : timeout); |
5ad312be | 570 | pktlen = packet_read_line(0, line, sizeof(line)); |
960deccb | 571 | alarm(0); |
7d80694a | 572 | |
5ad312be JL |
573 | len = strlen(line); |
574 | if (pktlen != len) | |
575 | loginfo("Extended attributes (%d bytes) exist <%.*s>", | |
576 | (int) pktlen - len, | |
577 | (int) pktlen - len, line + len + 1); | |
83543a24 | 578 | if (len && line[len-1] == '\n') { |
7d80694a | 579 | line[--len] = 0; |
83543a24 JH |
580 | pktlen--; |
581 | } | |
7d80694a | 582 | |
9d7ca667 RS |
583 | free(hostname); |
584 | free(canon_hostname); | |
585 | free(ip_address); | |
586 | free(tcp_port); | |
a47551c3 | 587 | hostname = canon_hostname = ip_address = tcp_port = NULL; |
eb30aed7 | 588 | |
d433ed0b | 589 | if (len != pktlen) |
73bb33a9 | 590 | parse_host_arg(line + len + 1, pktlen - len - 1); |
49ba83fb | 591 | |
d819e4e6 JH |
592 | for (i = 0; i < ARRAY_SIZE(daemon_service); i++) { |
593 | struct daemon_service *s = &(daemon_service[i]); | |
594 | int namelen = strlen(s->name); | |
599065a3 | 595 | if (!prefixcmp(line, "git-") && |
d819e4e6 | 596 | !strncmp(s->name, line + 4, namelen) && |
49ba83fb | 597 | line[namelen + 4] == ' ') { |
eb30aed7 JL |
598 | /* |
599 | * Note: The directory here is probably context sensitive, | |
600 | * and might depend on the actual service being performed. | |
601 | */ | |
a47551c3 | 602 | return run_service(line + namelen + 5, s); |
49ba83fb | 603 | } |
d819e4e6 | 604 | } |
a87e8be2 | 605 | |
f8ff0c06 | 606 | logerror("Protocol error: '%s'", line); |
a87e8be2 LT |
607 | return -1; |
608 | } | |
609 | ||
3bd62c21 | 610 | static int max_connections = 32; |
66e631de | 611 | |
3bd62c21 | 612 | static unsigned int live_children; |
66e631de | 613 | |
4d8fa916 | 614 | static struct child { |
3bd62c21 | 615 | struct child *next; |
66e631de | 616 | pid_t pid; |
df076bdb | 617 | struct sockaddr_storage address; |
3bd62c21 | 618 | } *firstborn; |
66e631de | 619 | |
3bd62c21 | 620 | static void add_child(pid_t pid, struct sockaddr *addr, int addrlen) |
66e631de | 621 | { |
460c2010 JH |
622 | struct child *newborn, **cradle; |
623 | ||
624 | /* | |
625 | * This must be xcalloc() -- we'll compare the whole sockaddr_storage | |
626 | * but individual address may be shorter. | |
627 | */ | |
628 | newborn = xcalloc(1, sizeof(*newborn)); | |
629 | live_children++; | |
630 | newborn->pid = pid; | |
631 | memcpy(&newborn->address, addr, addrlen); | |
632 | for (cradle = &firstborn; *cradle; cradle = &(*cradle)->next) | |
633 | if (!memcmp(&(*cradle)->address, &newborn->address, | |
634 | sizeof(newborn->address))) | |
635 | break; | |
636 | newborn->next = *cradle; | |
637 | *cradle = newborn; | |
66e631de LT |
638 | } |
639 | ||
3bd62c21 | 640 | static void remove_child(pid_t pid) |
66e631de | 641 | { |
3bd62c21 | 642 | struct child **cradle, *blanket; |
66e631de | 643 | |
3bd62c21 SB |
644 | for (cradle = &firstborn; (blanket = *cradle); cradle = &blanket->next) |
645 | if (blanket->pid == pid) { | |
646 | *cradle = blanket->next; | |
647 | live_children--; | |
648 | free(blanket); | |
649 | break; | |
650 | } | |
66e631de LT |
651 | } |
652 | ||
653 | /* | |
654 | * This gets called if the number of connections grows | |
655 | * past "max_connections". | |
656 | * | |
3bd62c21 | 657 | * We kill the newest connection from a duplicate IP. |
66e631de | 658 | */ |
3bd62c21 | 659 | static void kill_some_child(void) |
66e631de | 660 | { |
460c2010 | 661 | const struct child *blanket, *next; |
66e631de | 662 | |
460c2010 JH |
663 | if (!(blanket = firstborn)) |
664 | return; | |
695605b5 | 665 | |
460c2010 JH |
666 | for (; (next = blanket->next); blanket = next) |
667 | if (!memcmp(&blanket->address, &next->address, | |
668 | sizeof(next->address))) { | |
669 | kill(blanket->pid, SIGTERM); | |
670 | break; | |
671 | } | |
a5a9126b JS |
672 | } |
673 | ||
3bd62c21 | 674 | static void check_dead_children(void) |
a87e8be2 | 675 | { |
3bd62c21 SB |
676 | int status; |
677 | pid_t pid; | |
02d57da4 | 678 | |
460c2010 | 679 | while ((pid = waitpid(-1, &status, WNOHANG)) > 0) { |
3bd62c21 SB |
680 | const char *dead = ""; |
681 | remove_child(pid); | |
460c2010 | 682 | if (!WIFEXITED(status) || (WEXITSTATUS(status) > 0)) |
3bd62c21 | 683 | dead = " (with error)"; |
85e72830 | 684 | loginfo("[%"PRIuMAX"] Disconnected%s", (uintmax_t)pid, dead); |
02d57da4 LT |
685 | } |
686 | } | |
687 | ||
7fa09084 | 688 | static void handle(int incoming, struct sockaddr *addr, int addrlen) |
02d57da4 | 689 | { |
3bd62c21 | 690 | pid_t pid; |
02d57da4 | 691 | |
3bd62c21 SB |
692 | if (max_connections && live_children >= max_connections) { |
693 | kill_some_child(); | |
460c2010 | 694 | sleep(1); /* give it some time to die */ |
3bd62c21 SB |
695 | check_dead_children(); |
696 | if (live_children >= max_connections) { | |
697 | close(incoming); | |
698 | logerror("Too many children, dropping connection"); | |
699 | return; | |
700 | } | |
701 | } | |
02d57da4 | 702 | |
3bd62c21 | 703 | if ((pid = fork())) { |
02d57da4 | 704 | close(incoming); |
3bd62c21 SB |
705 | if (pid < 0) { |
706 | logerror("Couldn't fork %s", strerror(errno)); | |
02d57da4 | 707 | return; |
3bd62c21 | 708 | } |
02d57da4 | 709 | |
3bd62c21 | 710 | add_child(pid, addr, addrlen); |
a87e8be2 LT |
711 | return; |
712 | } | |
713 | ||
714 | dup2(incoming, 0); | |
715 | dup2(incoming, 1); | |
716 | close(incoming); | |
f8ff0c06 | 717 | |
5b276ee4 | 718 | exit(execute(addr)); |
a87e8be2 LT |
719 | } |
720 | ||
eaa94919 LT |
721 | static void child_handler(int signo) |
722 | { | |
460c2010 JH |
723 | /* |
724 | * Otherwise empty handler because systemcalls will get interrupted | |
695605b5 SB |
725 | * upon signal receipt |
726 | * SysV needs the handler to be rearmed | |
727 | */ | |
bd7b371e | 728 | signal(SIGCHLD, child_handler); |
eaa94919 LT |
729 | } |
730 | ||
1955fabf MW |
731 | static int set_reuse_addr(int sockfd) |
732 | { | |
733 | int on = 1; | |
734 | ||
735 | if (!reuseaddr) | |
736 | return 0; | |
737 | return setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, | |
738 | &on, sizeof(on)); | |
739 | } | |
740 | ||
6573faff PA |
741 | #ifndef NO_IPV6 |
742 | ||
dd467629 | 743 | static int socksetup(char *listen_addr, int listen_port, int **socklist_p) |
a87e8be2 | 744 | { |
df076bdb YH |
745 | int socknum = 0, *socklist = NULL; |
746 | int maxfd = -1; | |
df076bdb | 747 | char pbuf[NI_MAXSERV]; |
6573faff PA |
748 | struct addrinfo hints, *ai0, *ai; |
749 | int gai; | |
20276889 | 750 | long flags; |
df076bdb | 751 | |
dd467629 | 752 | sprintf(pbuf, "%d", listen_port); |
df076bdb YH |
753 | memset(&hints, 0, sizeof(hints)); |
754 | hints.ai_family = AF_UNSPEC; | |
755 | hints.ai_socktype = SOCK_STREAM; | |
756 | hints.ai_protocol = IPPROTO_TCP; | |
757 | hints.ai_flags = AI_PASSIVE; | |
758 | ||
dd467629 | 759 | gai = getaddrinfo(listen_addr, pbuf, &hints, &ai0); |
df076bdb | 760 | if (gai) |
d7530708 | 761 | die("getaddrinfo() failed: %s", gai_strerror(gai)); |
df076bdb | 762 | |
df076bdb YH |
763 | for (ai = ai0; ai; ai = ai->ai_next) { |
764 | int sockfd; | |
df076bdb YH |
765 | |
766 | sockfd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol); | |
767 | if (sockfd < 0) | |
768 | continue; | |
769 | if (sockfd >= FD_SETSIZE) { | |
df0daf8a | 770 | logerror("Socket descriptor too large"); |
df076bdb YH |
771 | close(sockfd); |
772 | continue; | |
773 | } | |
774 | ||
775 | #ifdef IPV6_V6ONLY | |
776 | if (ai->ai_family == AF_INET6) { | |
777 | int on = 1; | |
778 | setsockopt(sockfd, IPPROTO_IPV6, IPV6_V6ONLY, | |
779 | &on, sizeof(on)); | |
780 | /* Note: error is not fatal */ | |
781 | } | |
782 | #endif | |
783 | ||
1955fabf MW |
784 | if (set_reuse_addr(sockfd)) { |
785 | close(sockfd); | |
0032d548 | 786 | continue; |
1955fabf MW |
787 | } |
788 | ||
df076bdb YH |
789 | if (bind(sockfd, ai->ai_addr, ai->ai_addrlen) < 0) { |
790 | close(sockfd); | |
791 | continue; /* not fatal */ | |
792 | } | |
793 | if (listen(sockfd, 5) < 0) { | |
794 | close(sockfd); | |
795 | continue; /* not fatal */ | |
796 | } | |
797 | ||
20276889 AJ |
798 | flags = fcntl(sockfd, F_GETFD, 0); |
799 | if (flags >= 0) | |
800 | fcntl(sockfd, F_SETFD, flags | FD_CLOEXEC); | |
801 | ||
83572c1a | 802 | socklist = xrealloc(socklist, sizeof(int) * (socknum + 1)); |
df076bdb YH |
803 | socklist[socknum++] = sockfd; |
804 | ||
df076bdb YH |
805 | if (maxfd < sockfd) |
806 | maxfd = sockfd; | |
807 | } | |
808 | ||
809 | freeaddrinfo(ai0); | |
810 | ||
6573faff PA |
811 | *socklist_p = socklist; |
812 | return socknum; | |
813 | } | |
814 | ||
815 | #else /* NO_IPV6 */ | |
816 | ||
100690b6 | 817 | static int socksetup(char *listen_addr, int listen_port, int **socklist_p) |
6573faff PA |
818 | { |
819 | struct sockaddr_in sin; | |
820 | int sockfd; | |
20276889 | 821 | long flags; |
6573faff | 822 | |
dd467629 JL |
823 | memset(&sin, 0, sizeof sin); |
824 | sin.sin_family = AF_INET; | |
825 | sin.sin_port = htons(listen_port); | |
826 | ||
827 | if (listen_addr) { | |
828 | /* Well, host better be an IP address here. */ | |
829 | if (inet_pton(AF_INET, listen_addr, &sin.sin_addr.s_addr) <= 0) | |
830 | return 0; | |
831 | } else { | |
832 | sin.sin_addr.s_addr = htonl(INADDR_ANY); | |
833 | } | |
834 | ||
6573faff PA |
835 | sockfd = socket(AF_INET, SOCK_STREAM, 0); |
836 | if (sockfd < 0) | |
837 | return 0; | |
838 | ||
1955fabf MW |
839 | if (set_reuse_addr(sockfd)) { |
840 | close(sockfd); | |
841 | return 0; | |
842 | } | |
843 | ||
6573faff PA |
844 | if ( bind(sockfd, (struct sockaddr *)&sin, sizeof sin) < 0 ) { |
845 | close(sockfd); | |
846 | return 0; | |
847 | } | |
a87e8be2 | 848 | |
f35230fb PS |
849 | if (listen(sockfd, 5) < 0) { |
850 | close(sockfd); | |
851 | return 0; | |
852 | } | |
853 | ||
20276889 AJ |
854 | flags = fcntl(sockfd, F_GETFD, 0); |
855 | if (flags >= 0) | |
856 | fcntl(sockfd, F_SETFD, flags | FD_CLOEXEC); | |
857 | ||
1b4713fb | 858 | *socklist_p = xmalloc(sizeof(int)); |
6573faff | 859 | **socklist_p = sockfd; |
f35230fb | 860 | return 1; |
6573faff PA |
861 | } |
862 | ||
863 | #endif | |
864 | ||
865 | static int service_loop(int socknum, int *socklist) | |
866 | { | |
867 | struct pollfd *pfd; | |
868 | int i; | |
869 | ||
695605b5 | 870 | pfd = xcalloc(socknum, sizeof(struct pollfd)); |
6573faff PA |
871 | |
872 | for (i = 0; i < socknum; i++) { | |
873 | pfd[i].fd = socklist[i]; | |
874 | pfd[i].events = POLLIN; | |
875 | } | |
9220282a PA |
876 | |
877 | signal(SIGCHLD, child_handler); | |
a87e8be2 LT |
878 | |
879 | for (;;) { | |
df076bdb | 880 | int i; |
6573faff | 881 | |
695605b5 SB |
882 | check_dead_children(); |
883 | ||
884 | if (poll(pfd, socknum, -1) < 0) { | |
1eef0b33 | 885 | if (errno != EINTR) { |
df0daf8a | 886 | logerror("Poll failed, resuming: %s", |
1eef0b33 JH |
887 | strerror(errno)); |
888 | sleep(1); | |
889 | } | |
df076bdb YH |
890 | continue; |
891 | } | |
892 | ||
893 | for (i = 0; i < socknum; i++) { | |
6573faff | 894 | if (pfd[i].revents & POLLIN) { |
df076bdb | 895 | struct sockaddr_storage ss; |
7626e49e | 896 | unsigned int sslen = sizeof(ss); |
6573faff | 897 | int incoming = accept(pfd[i].fd, (struct sockaddr *)&ss, &sslen); |
df076bdb YH |
898 | if (incoming < 0) { |
899 | switch (errno) { | |
900 | case EAGAIN: | |
901 | case EINTR: | |
902 | case ECONNABORTED: | |
903 | continue; | |
904 | default: | |
d824cbba | 905 | die_errno("accept returned"); |
df076bdb YH |
906 | } |
907 | } | |
908 | handle(incoming, (struct sockaddr *)&ss, sslen); | |
a87e8be2 LT |
909 | } |
910 | } | |
a87e8be2 LT |
911 | } |
912 | } | |
913 | ||
258e93a1 ML |
914 | /* if any standard file descriptor is missing open it to /dev/null */ |
915 | static void sanitize_stdfds(void) | |
916 | { | |
917 | int fd = open("/dev/null", O_RDWR, 0); | |
918 | while (fd != -1 && fd < 2) | |
919 | fd = dup(fd); | |
920 | if (fd == -1) | |
d824cbba | 921 | die_errno("open /dev/null or dup failed"); |
258e93a1 ML |
922 | if (fd > 2) |
923 | close(fd); | |
924 | } | |
925 | ||
a5262768 ML |
926 | static void daemonize(void) |
927 | { | |
928 | switch (fork()) { | |
929 | case 0: | |
930 | break; | |
931 | case -1: | |
d824cbba | 932 | die_errno("fork failed"); |
a5262768 ML |
933 | default: |
934 | exit(0); | |
935 | } | |
936 | if (setsid() == -1) | |
d824cbba | 937 | die_errno("setsid failed"); |
a5262768 ML |
938 | close(0); |
939 | close(1); | |
940 | close(2); | |
941 | sanitize_stdfds(); | |
942 | } | |
943 | ||
45ed5d7f ML |
944 | static void store_pid(const char *path) |
945 | { | |
946 | FILE *f = fopen(path, "w"); | |
947 | if (!f) | |
d824cbba | 948 | die_errno("cannot open pid file '%s'", path); |
85e72830 | 949 | if (fprintf(f, "%"PRIuMAX"\n", (uintmax_t) getpid()) < 0 || fclose(f) != 0) |
d824cbba | 950 | die_errno("failed to write pid file '%s'", path); |
45ed5d7f ML |
951 | } |
952 | ||
dd467629 | 953 | static int serve(char *listen_addr, int listen_port, struct passwd *pass, gid_t gid) |
6573faff PA |
954 | { |
955 | int socknum, *socklist; | |
4ae22d96 | 956 | |
dd467629 | 957 | socknum = socksetup(listen_addr, listen_port, &socklist); |
6573faff | 958 | if (socknum == 0) |
dd467629 JL |
959 | die("unable to allocate any listen sockets on host %s port %u", |
960 | listen_addr, listen_port); | |
4ae22d96 | 961 | |
678dac6b TS |
962 | if (pass && gid && |
963 | (initgroups(pass->pw_name, gid) || setgid (gid) || | |
964 | setuid(pass->pw_uid))) | |
965 | die("cannot drop privileges"); | |
966 | ||
6573faff | 967 | return service_loop(socknum, socklist); |
4ae22d96 | 968 | } |
6573faff | 969 | |
a87e8be2 LT |
970 | int main(int argc, char **argv) |
971 | { | |
dd467629 JL |
972 | int listen_port = 0; |
973 | char *listen_addr = NULL; | |
e64e1b79 | 974 | int inetd_mode = 0; |
678dac6b | 975 | const char *pid_file = NULL, *user_name = NULL, *group_name = NULL; |
a5262768 | 976 | int detach = 0; |
678dac6b TS |
977 | struct passwd *pass = NULL; |
978 | struct group *group; | |
979 | gid_t gid = 0; | |
a87e8be2 LT |
980 | int i; |
981 | ||
2fb3f6db SP |
982 | git_extract_argv0_path(argv[0]); |
983 | ||
a87e8be2 LT |
984 | for (i = 1; i < argc; i++) { |
985 | char *arg = argv[i]; | |
986 | ||
cc44c765 | 987 | if (!prefixcmp(arg, "--listen=")) { |
6720e95b RS |
988 | listen_addr = xstrdup_tolower(arg + 9); |
989 | continue; | |
dd467629 | 990 | } |
cc44c765 | 991 | if (!prefixcmp(arg, "--port=")) { |
a87e8be2 LT |
992 | char *end; |
993 | unsigned long n; | |
994 | n = strtoul(arg+7, &end, 0); | |
995 | if (arg[7] && !*end) { | |
dd467629 | 996 | listen_port = n; |
a87e8be2 LT |
997 | continue; |
998 | } | |
999 | } | |
e64e1b79 LT |
1000 | if (!strcmp(arg, "--inetd")) { |
1001 | inetd_mode = 1; | |
a8883288 | 1002 | log_syslog = 1; |
e64e1b79 LT |
1003 | continue; |
1004 | } | |
f8ff0c06 PB |
1005 | if (!strcmp(arg, "--verbose")) { |
1006 | verbose = 1; | |
1007 | continue; | |
1008 | } | |
9048fe1c PB |
1009 | if (!strcmp(arg, "--syslog")) { |
1010 | log_syslog = 1; | |
9048fe1c PB |
1011 | continue; |
1012 | } | |
4ae95682 PA |
1013 | if (!strcmp(arg, "--export-all")) { |
1014 | export_all_trees = 1; | |
1015 | continue; | |
1016 | } | |
cc44c765 | 1017 | if (!prefixcmp(arg, "--timeout=")) { |
960deccb | 1018 | timeout = atoi(arg+10); |
a8883288 | 1019 | continue; |
960deccb | 1020 | } |
cc44c765 | 1021 | if (!prefixcmp(arg, "--init-timeout=")) { |
960deccb | 1022 | init_timeout = atoi(arg+15); |
a8883288 | 1023 | continue; |
960deccb | 1024 | } |
3bd62c21 SB |
1025 | if (!prefixcmp(arg, "--max-connections=")) { |
1026 | max_connections = atoi(arg+18); | |
1027 | if (max_connections < 0) | |
1028 | max_connections = 0; /* unlimited */ | |
1029 | continue; | |
1030 | } | |
4dbd1352 AE |
1031 | if (!strcmp(arg, "--strict-paths")) { |
1032 | strict_paths = 1; | |
1033 | continue; | |
1034 | } | |
cc44c765 | 1035 | if (!prefixcmp(arg, "--base-path=")) { |
b21c31c9 PB |
1036 | base_path = arg+12; |
1037 | continue; | |
1038 | } | |
73a7a656 JA |
1039 | if (!strcmp(arg, "--base-path-relaxed")) { |
1040 | base_path_relaxed = 1; | |
1041 | continue; | |
1042 | } | |
cc44c765 | 1043 | if (!prefixcmp(arg, "--interpolated-path=")) { |
49ba83fb JL |
1044 | interpolated_path = arg+20; |
1045 | continue; | |
1046 | } | |
1955fabf MW |
1047 | if (!strcmp(arg, "--reuseaddr")) { |
1048 | reuseaddr = 1; | |
1049 | continue; | |
1050 | } | |
603968d2 JH |
1051 | if (!strcmp(arg, "--user-path")) { |
1052 | user_path = ""; | |
1053 | continue; | |
1054 | } | |
cc44c765 | 1055 | if (!prefixcmp(arg, "--user-path=")) { |
603968d2 JH |
1056 | user_path = arg + 12; |
1057 | continue; | |
1058 | } | |
cc44c765 | 1059 | if (!prefixcmp(arg, "--pid-file=")) { |
45ed5d7f ML |
1060 | pid_file = arg + 11; |
1061 | continue; | |
1062 | } | |
a5262768 ML |
1063 | if (!strcmp(arg, "--detach")) { |
1064 | detach = 1; | |
1065 | log_syslog = 1; | |
1066 | continue; | |
1067 | } | |
cc44c765 | 1068 | if (!prefixcmp(arg, "--user=")) { |
678dac6b TS |
1069 | user_name = arg + 7; |
1070 | continue; | |
1071 | } | |
cc44c765 | 1072 | if (!prefixcmp(arg, "--group=")) { |
678dac6b TS |
1073 | group_name = arg + 8; |
1074 | continue; | |
1075 | } | |
cc44c765 | 1076 | if (!prefixcmp(arg, "--enable=")) { |
d819e4e6 JH |
1077 | enable_service(arg + 9, 1); |
1078 | continue; | |
1079 | } | |
cc44c765 | 1080 | if (!prefixcmp(arg, "--disable=")) { |
d819e4e6 JH |
1081 | enable_service(arg + 10, 0); |
1082 | continue; | |
1083 | } | |
cc44c765 | 1084 | if (!prefixcmp(arg, "--allow-override=")) { |
74c0cc21 | 1085 | make_service_overridable(arg + 17, 1); |
d819e4e6 JH |
1086 | continue; |
1087 | } | |
cc44c765 | 1088 | if (!prefixcmp(arg, "--forbid-override=")) { |
74c0cc21 | 1089 | make_service_overridable(arg + 18, 0); |
d819e4e6 JH |
1090 | continue; |
1091 | } | |
4ae95682 PA |
1092 | if (!strcmp(arg, "--")) { |
1093 | ok_paths = &argv[i+1]; | |
1094 | break; | |
1095 | } else if (arg[0] != '-') { | |
1096 | ok_paths = &argv[i]; | |
1097 | break; | |
1098 | } | |
e64e1b79 | 1099 | |
a87e8be2 LT |
1100 | usage(daemon_usage); |
1101 | } | |
1102 | ||
22665bba | 1103 | if (log_syslog) { |
6a992e9e | 1104 | openlog("git-daemon", LOG_PID, LOG_DAEMON); |
22665bba | 1105 | set_die_routine(daemon_die); |
460c2010 | 1106 | } else |
48196afd JH |
1107 | /* avoid splitting a message in the middle */ |
1108 | setvbuf(stderr, NULL, _IOLBF, 0); | |
22665bba | 1109 | |
678dac6b TS |
1110 | if (inetd_mode && (group_name || user_name)) |
1111 | die("--user and --group are incompatible with --inetd"); | |
1112 | ||
dd467629 JL |
1113 | if (inetd_mode && (listen_port || listen_addr)) |
1114 | die("--listen= and --port= are incompatible with --inetd"); | |
1115 | else if (listen_port == 0) | |
1116 | listen_port = DEFAULT_GIT_PORT; | |
1117 | ||
678dac6b TS |
1118 | if (group_name && !user_name) |
1119 | die("--group supplied without --user"); | |
1120 | ||
1121 | if (user_name) { | |
1122 | pass = getpwnam(user_name); | |
1123 | if (!pass) | |
1124 | die("user not found - %s", user_name); | |
1125 | ||
1126 | if (!group_name) | |
1127 | gid = pass->pw_gid; | |
1128 | else { | |
1129 | group = getgrnam(group_name); | |
1130 | if (!group) | |
1131 | die("group not found - %s", group_name); | |
1132 | ||
1133 | gid = group->gr_gid; | |
1134 | } | |
1135 | } | |
1136 | ||
ad8b4f56 ML |
1137 | if (strict_paths && (!ok_paths || !*ok_paths)) |
1138 | die("option --strict-paths requires a whitelist"); | |
1139 | ||
90b4a71c JH |
1140 | if (base_path && !is_directory(base_path)) |
1141 | die("base-path '%s' does not exist or is not a directory", | |
1142 | base_path); | |
20632071 | 1143 | |
7c3693f1 | 1144 | if (inetd_mode) { |
5b276ee4 DW |
1145 | struct sockaddr_storage ss; |
1146 | struct sockaddr *peer = (struct sockaddr *)&ss; | |
1147 | socklen_t slen = sizeof(ss); | |
1148 | ||
c569b1fe | 1149 | if (!freopen("/dev/null", "w", stderr)) |
d824cbba | 1150 | die_errno("failed to redirect stderr to /dev/null"); |
5b276ee4 DW |
1151 | |
1152 | if (getpeername(0, peer, &slen)) | |
1153 | peer = NULL; | |
1154 | ||
1155 | return execute(peer); | |
7c3693f1 | 1156 | } |
bce8230d | 1157 | |
6a992e9e | 1158 | if (detach) { |
a5262768 | 1159 | daemonize(); |
6a992e9e SB |
1160 | loginfo("Ready to rumble"); |
1161 | } | |
a5262768 ML |
1162 | else |
1163 | sanitize_stdfds(); | |
258e93a1 | 1164 | |
45ed5d7f ML |
1165 | if (pid_file) |
1166 | store_pid(pid_file); | |
1167 | ||
dd467629 | 1168 | return serve(listen_addr, listen_port, pass, gid); |
a87e8be2 | 1169 | } |