]>
Commit | Line | Data |
---|---|---|
979e32fa | 1 | #include "cache.h" |
85023577 | 2 | #include "pkt-line.h" |
77cb17e9 | 3 | #include "exec_cmd.h" |
49ba83fb | 4 | #include "interpolate.h" |
f8ff0c06 | 5 | |
85023577 JH |
6 | #include <syslog.h> |
7 | ||
695dffe2 JS |
8 | #ifndef HOST_NAME_MAX |
9 | #define HOST_NAME_MAX 256 | |
10 | #endif | |
11 | ||
9048fe1c | 12 | static int log_syslog; |
f8ff0c06 | 13 | static int verbose; |
1955fabf | 14 | static int reuseaddr; |
f8ff0c06 | 15 | |
960deccb | 16 | static const char daemon_usage[] = |
dd467629 | 17 | "git-daemon [--verbose] [--syslog] [--export-all]\n" |
b21c31c9 | 18 | " [--timeout=n] [--init-timeout=n] [--strict-paths]\n" |
73a7a656 JA |
19 | " [--base-path=path] [--base-path-relaxed]\n" |
20 | " [--user-path | --user-path=path]\n" | |
49ba83fb | 21 | " [--interpolated-path=path]\n" |
678dac6b | 22 | " [--reuseaddr] [--detach] [--pid-file=file]\n" |
d9edcbd6 | 23 | " [--[enable|disable|allow-override|forbid-override]=service]\n" |
dd467629 JL |
24 | " [--inetd | [--listen=host_or_ipaddr] [--port=n]\n" |
25 | " [--user=user [--group=group]]\n" | |
26 | " [directory...]"; | |
4ae95682 PA |
27 | |
28 | /* List of acceptable pathname prefixes */ | |
96f1e58f DR |
29 | static char **ok_paths; |
30 | static int strict_paths; | |
4ae95682 PA |
31 | |
32 | /* If this is set, git-daemon-export-ok is not required */ | |
96f1e58f | 33 | static int export_all_trees; |
f8ff0c06 | 34 | |
b21c31c9 | 35 | /* Take all paths relative to this one if non-NULL */ |
96f1e58f | 36 | static char *base_path; |
49ba83fb | 37 | static char *interpolated_path; |
73a7a656 | 38 | static int base_path_relaxed; |
49ba83fb JL |
39 | |
40 | /* Flag indicating client sent extra args. */ | |
41 | static int saw_extended_args; | |
b21c31c9 | 42 | |
603968d2 JH |
43 | /* If defined, ~user notation is allowed and the string is inserted |
44 | * after ~user/. E.g. a request to git://host/~alice/frotz would | |
45 | * go to /home/alice/pub_git/frotz with --user-path=pub_git. | |
46 | */ | |
96f1e58f | 47 | static const char *user_path; |
603968d2 | 48 | |
960deccb | 49 | /* Timeout, and initial timeout */ |
96f1e58f DR |
50 | static unsigned int timeout; |
51 | static unsigned int init_timeout; | |
f8ff0c06 | 52 | |
49ba83fb JL |
53 | /* |
54 | * Static table for now. Ugh. | |
55 | * Feel free to make dynamic as needed. | |
56 | */ | |
57 | #define INTERP_SLOT_HOST (0) | |
dd467629 JL |
58 | #define INTERP_SLOT_CANON_HOST (1) |
59 | #define INTERP_SLOT_IP (2) | |
60 | #define INTERP_SLOT_PORT (3) | |
61 | #define INTERP_SLOT_DIR (4) | |
62 | #define INTERP_SLOT_PERCENT (5) | |
49ba83fb JL |
63 | |
64 | static struct interp interp_table[] = { | |
65 | { "%H", 0}, | |
dd467629 JL |
66 | { "%CH", 0}, |
67 | { "%IP", 0}, | |
68 | { "%P", 0}, | |
49ba83fb | 69 | { "%D", 0}, |
eb30aed7 | 70 | { "%%", 0}, |
49ba83fb JL |
71 | }; |
72 | ||
73 | ||
9048fe1c | 74 | static void logreport(int priority, const char *err, va_list params) |
f8ff0c06 PB |
75 | { |
76 | /* We should do a single write so that it is atomic and output | |
77 | * of several processes do not get intermingled. */ | |
78 | char buf[1024]; | |
79 | int buflen; | |
80 | int maxlen, msglen; | |
81 | ||
82 | /* sizeof(buf) should be big enough for "[pid] \n" */ | |
1bedd4ca | 83 | buflen = snprintf(buf, sizeof(buf), "[%ld] ", (long) getpid()); |
f8ff0c06 PB |
84 | |
85 | maxlen = sizeof(buf) - buflen - 1; /* -1 for our own LF */ | |
86 | msglen = vsnprintf(buf + buflen, maxlen, err, params); | |
87 | ||
9048fe1c PB |
88 | if (log_syslog) { |
89 | syslog(priority, "%s", buf); | |
90 | return; | |
91 | } | |
92 | ||
f8ff0c06 PB |
93 | /* maxlen counted our own LF but also counts space given to |
94 | * vsnprintf for the terminating NUL. We want to make sure that | |
95 | * we have space for our own LF and NUL after the "meat" of the | |
96 | * message, so truncate it at maxlen - 1. | |
97 | */ | |
98 | if (msglen > maxlen - 1) | |
99 | msglen = maxlen - 1; | |
100 | else if (msglen < 0) | |
101 | msglen = 0; /* Protect against weird return values. */ | |
102 | buflen += msglen; | |
103 | ||
104 | buf[buflen++] = '\n'; | |
105 | buf[buflen] = '\0'; | |
106 | ||
93822c22 | 107 | write_in_full(2, buf, buflen); |
f8ff0c06 PB |
108 | } |
109 | ||
cdda4745 | 110 | static void logerror(const char *err, ...) |
f8ff0c06 PB |
111 | { |
112 | va_list params; | |
113 | va_start(params, err); | |
9048fe1c | 114 | logreport(LOG_ERR, err, params); |
f8ff0c06 PB |
115 | va_end(params); |
116 | } | |
117 | ||
cdda4745 | 118 | static void loginfo(const char *err, ...) |
f8ff0c06 PB |
119 | { |
120 | va_list params; | |
121 | if (!verbose) | |
122 | return; | |
123 | va_start(params, err); | |
9048fe1c | 124 | logreport(LOG_INFO, err, params); |
f8ff0c06 PB |
125 | va_end(params); |
126 | } | |
a87e8be2 | 127 | |
ad8b4f56 ML |
128 | static void NORETURN daemon_die(const char *err, va_list params) |
129 | { | |
130 | logreport(LOG_ERR, err, params); | |
131 | exit(1); | |
132 | } | |
133 | ||
d79374c7 JH |
134 | static int avoid_alias(char *p) |
135 | { | |
136 | int sl, ndot; | |
137 | ||
a6080a0a | 138 | /* |
d79374c7 JH |
139 | * This resurrects the belts and suspenders paranoia check by HPA |
140 | * done in <435560F7.4080006@zytor.com> thread, now enter_repo() | |
141 | * does not do getcwd() based path canonicalizations. | |
142 | * | |
143 | * sl becomes true immediately after seeing '/' and continues to | |
144 | * be true as long as dots continue after that without intervening | |
145 | * non-dot character. | |
146 | */ | |
147 | if (!p || (*p != '/' && *p != '~')) | |
148 | return -1; | |
149 | sl = 1; ndot = 0; | |
150 | p++; | |
151 | ||
152 | while (1) { | |
153 | char ch = *p++; | |
154 | if (sl) { | |
155 | if (ch == '.') | |
156 | ndot++; | |
157 | else if (ch == '/') { | |
158 | if (ndot < 3) | |
159 | /* reject //, /./ and /../ */ | |
160 | return -1; | |
161 | ndot = 0; | |
162 | } | |
163 | else if (ch == 0) { | |
164 | if (0 < ndot && ndot < 3) | |
165 | /* reject /.$ and /..$ */ | |
166 | return -1; | |
167 | return 0; | |
168 | } | |
169 | else | |
170 | sl = ndot = 0; | |
171 | } | |
172 | else if (ch == 0) | |
173 | return 0; | |
174 | else if (ch == '/') { | |
175 | sl = 1; | |
176 | ndot = 0; | |
177 | } | |
178 | } | |
179 | } | |
180 | ||
49ba83fb | 181 | static char *path_ok(struct interp *itable) |
4ae95682 | 182 | { |
603968d2 | 183 | static char rpath[PATH_MAX]; |
49ba83fb | 184 | static char interp_path[PATH_MAX]; |
73a7a656 | 185 | int retried_path = 0; |
d79374c7 | 186 | char *path; |
49ba83fb JL |
187 | char *dir; |
188 | ||
189 | dir = itable[INTERP_SLOT_DIR].value; | |
d79374c7 JH |
190 | |
191 | if (avoid_alias(dir)) { | |
192 | logerror("'%s': aliased", dir); | |
193 | return NULL; | |
194 | } | |
195 | ||
603968d2 JH |
196 | if (*dir == '~') { |
197 | if (!user_path) { | |
198 | logerror("'%s': User-path not allowed", dir); | |
199 | return NULL; | |
200 | } | |
201 | if (*user_path) { | |
202 | /* Got either "~alice" or "~alice/foo"; | |
203 | * rewrite them to "~alice/%s" or | |
204 | * "~alice/%s/foo". | |
205 | */ | |
206 | int namlen, restlen = strlen(dir); | |
207 | char *slash = strchr(dir, '/'); | |
208 | if (!slash) | |
209 | slash = dir + restlen; | |
210 | namlen = slash - dir; | |
211 | restlen -= namlen; | |
212 | loginfo("userpath <%s>, request <%s>, namlen %d, restlen %d, slash <%s>", user_path, dir, namlen, restlen, slash); | |
213 | snprintf(rpath, PATH_MAX, "%.*s/%s%.*s", | |
214 | namlen, dir, user_path, restlen, slash); | |
215 | dir = rpath; | |
216 | } | |
217 | } | |
49ba83fb JL |
218 | else if (interpolated_path && saw_extended_args) { |
219 | if (*dir != '/') { | |
220 | /* Allow only absolute */ | |
221 | logerror("'%s': Non-absolute path denied (interpolated-path active)", dir); | |
222 | return NULL; | |
223 | } | |
224 | ||
225 | interpolate(interp_path, PATH_MAX, interpolated_path, | |
226 | interp_table, ARRAY_SIZE(interp_table)); | |
227 | loginfo("Interpolated dir '%s'", interp_path); | |
228 | ||
229 | dir = interp_path; | |
230 | } | |
603968d2 JH |
231 | else if (base_path) { |
232 | if (*dir != '/') { | |
233 | /* Allow only absolute */ | |
1fda3d55 | 234 | logerror("'%s': Non-absolute path denied (base-path active)", dir); |
b21c31c9 PB |
235 | return NULL; |
236 | } | |
49ba83fb JL |
237 | snprintf(rpath, PATH_MAX, "%s%s", base_path, dir); |
238 | dir = rpath; | |
b21c31c9 PB |
239 | } |
240 | ||
73a7a656 JA |
241 | do { |
242 | path = enter_repo(dir, strict_paths); | |
243 | if (path) | |
244 | break; | |
245 | ||
246 | /* | |
247 | * if we fail and base_path_relaxed is enabled, try without | |
248 | * prefixing the base path | |
249 | */ | |
250 | if (base_path && base_path_relaxed && !retried_path) { | |
251 | dir = itable[INTERP_SLOT_DIR].value; | |
252 | retried_path = 1; | |
253 | continue; | |
254 | } | |
255 | break; | |
256 | } while (1); | |
3e04c62d | 257 | |
4dbd1352 AE |
258 | if (!path) { |
259 | logerror("'%s': unable to chdir or not a git archive", dir); | |
260 | return NULL; | |
4ae95682 PA |
261 | } |
262 | ||
263 | if ( ok_paths && *ok_paths ) { | |
ce335fe0 | 264 | char **pp; |
4dbd1352 | 265 | int pathlen = strlen(path); |
4ae95682 | 266 | |
ce335fe0 | 267 | /* The validation is done on the paths after enter_repo |
a6080a0a | 268 | * appends optional {.git,.git/.git} and friends, but |
d79374c7 JH |
269 | * it does not use getcwd(). So if your /pub is |
270 | * a symlink to /mnt/pub, you can whitelist /pub and | |
271 | * do not have to say /mnt/pub. | |
272 | * Do not say /pub/. | |
ce335fe0 | 273 | */ |
4ae95682 PA |
274 | for ( pp = ok_paths ; *pp ; pp++ ) { |
275 | int len = strlen(*pp); | |
ce335fe0 JH |
276 | if (len <= pathlen && |
277 | !memcmp(*pp, path, len) && | |
278 | (path[len] == '\0' || | |
279 | (!strict_paths && path[len] == '/'))) | |
280 | return path; | |
4ae95682 | 281 | } |
4dbd1352 AE |
282 | } |
283 | else { | |
284 | /* be backwards compatible */ | |
285 | if (!strict_paths) | |
286 | return path; | |
4ae95682 PA |
287 | } |
288 | ||
4dbd1352 AE |
289 | logerror("'%s': not in whitelist", path); |
290 | return NULL; /* Fallthrough. Deny by default */ | |
4ae95682 | 291 | } |
a87e8be2 | 292 | |
d819e4e6 JH |
293 | typedef int (*daemon_service_fn)(void); |
294 | struct daemon_service { | |
295 | const char *name; | |
296 | const char *config_name; | |
297 | daemon_service_fn fn; | |
298 | int enabled; | |
299 | int overridable; | |
300 | }; | |
301 | ||
302 | static struct daemon_service *service_looking_at; | |
303 | static int service_enabled; | |
304 | ||
305 | static int git_daemon_config(const char *var, const char *value) | |
306 | { | |
cc44c765 | 307 | if (!prefixcmp(var, "daemon.") && |
d819e4e6 JH |
308 | !strcmp(var + 7, service_looking_at->config_name)) { |
309 | service_enabled = git_config_bool(var, value); | |
310 | return 0; | |
311 | } | |
312 | ||
313 | /* we are not interested in parsing any other configuration here */ | |
314 | return 0; | |
315 | } | |
316 | ||
49ba83fb | 317 | static int run_service(struct interp *itable, struct daemon_service *service) |
a87e8be2 | 318 | { |
4dbd1352 | 319 | const char *path; |
d819e4e6 JH |
320 | int enabled = service->enabled; |
321 | ||
49ba83fb JL |
322 | loginfo("Request %s for '%s'", |
323 | service->name, | |
324 | itable[INTERP_SLOT_DIR].value); | |
4dbd1352 | 325 | |
d819e4e6 JH |
326 | if (!enabled && !service->overridable) { |
327 | logerror("'%s': service not enabled.", service->name); | |
328 | errno = EACCES; | |
329 | return -1; | |
330 | } | |
4ae95682 | 331 | |
49ba83fb | 332 | if (!(path = path_ok(itable))) |
a87e8be2 | 333 | return -1; |
47888f0f | 334 | |
a87e8be2 LT |
335 | /* |
336 | * Security on the cheap. | |
337 | * | |
a935c397 | 338 | * We want a readable HEAD, usable "objects" directory, and |
a87e8be2 LT |
339 | * a "git-daemon-export-ok" flag that says that the other side |
340 | * is ok with us doing this. | |
4dbd1352 AE |
341 | * |
342 | * path_ok() uses enter_repo() and does whitelist checking. | |
343 | * We only need to make sure the repository is exported. | |
a87e8be2 | 344 | */ |
4dbd1352 | 345 | |
3e04c62d | 346 | if (!export_all_trees && access("git-daemon-export-ok", F_OK)) { |
4dbd1352 | 347 | logerror("'%s': repository not exported.", path); |
3e04c62d PA |
348 | errno = EACCES; |
349 | return -1; | |
350 | } | |
351 | ||
d819e4e6 JH |
352 | if (service->overridable) { |
353 | service_looking_at = service; | |
354 | service_enabled = -1; | |
355 | git_config(git_daemon_config); | |
356 | if (0 <= service_enabled) | |
357 | enabled = service_enabled; | |
358 | } | |
359 | if (!enabled) { | |
360 | logerror("'%s': service not enabled for '%s'", | |
361 | service->name, path); | |
362 | errno = EACCES; | |
363 | return -1; | |
364 | } | |
365 | ||
02d57da4 LT |
366 | /* |
367 | * We'll ignore SIGTERM from now on, we have a | |
368 | * good client. | |
369 | */ | |
370 | signal(SIGTERM, SIG_IGN); | |
371 | ||
d819e4e6 JH |
372 | return service->fn(); |
373 | } | |
374 | ||
375 | static int upload_pack(void) | |
376 | { | |
377 | /* Timeout as string */ | |
378 | char timeout_buf[64]; | |
379 | ||
960deccb PA |
380 | snprintf(timeout_buf, sizeof timeout_buf, "--timeout=%u", timeout); |
381 | ||
a87e8be2 | 382 | /* git-upload-pack only ever reads stuff, so this is safe */ |
77cb17e9 | 383 | execl_git_cmd("upload-pack", "--strict", timeout_buf, ".", NULL); |
a87e8be2 LT |
384 | return -1; |
385 | } | |
386 | ||
39345a21 FBH |
387 | static int upload_archive(void) |
388 | { | |
389 | execl_git_cmd("upload-archive", ".", NULL); | |
390 | return -1; | |
391 | } | |
392 | ||
4b3b1e1e LT |
393 | static int receive_pack(void) |
394 | { | |
395 | execl_git_cmd("receive-pack", ".", NULL); | |
396 | return -1; | |
397 | } | |
398 | ||
d819e4e6 | 399 | static struct daemon_service daemon_service[] = { |
39345a21 | 400 | { "upload-archive", "uploadarch", upload_archive, 0, 1 }, |
d819e4e6 | 401 | { "upload-pack", "uploadpack", upload_pack, 1, 1 }, |
4b3b1e1e | 402 | { "receive-pack", "receivepack", receive_pack, 0, 1 }, |
d819e4e6 JH |
403 | }; |
404 | ||
405 | static void enable_service(const char *name, int ena) { | |
406 | int i; | |
407 | for (i = 0; i < ARRAY_SIZE(daemon_service); i++) { | |
408 | if (!strcmp(daemon_service[i].name, name)) { | |
409 | daemon_service[i].enabled = ena; | |
410 | return; | |
411 | } | |
412 | } | |
413 | die("No such service %s", name); | |
414 | } | |
415 | ||
416 | static void make_service_overridable(const char *name, int ena) { | |
417 | int i; | |
418 | for (i = 0; i < ARRAY_SIZE(daemon_service); i++) { | |
419 | if (!strcmp(daemon_service[i].name, name)) { | |
420 | daemon_service[i].overridable = ena; | |
421 | return; | |
422 | } | |
423 | } | |
424 | die("No such service %s", name); | |
425 | } | |
426 | ||
eb30aed7 JL |
427 | /* |
428 | * Separate the "extra args" information as supplied by the client connection. | |
3dff5379 | 429 | * Any resulting data is squirreled away in the given interpolation table. |
eb30aed7 JL |
430 | */ |
431 | static void parse_extra_args(struct interp *table, char *extra_args, int buflen) | |
49ba83fb JL |
432 | { |
433 | char *val; | |
434 | int vallen; | |
435 | char *end = extra_args + buflen; | |
436 | ||
437 | while (extra_args < end && *extra_args) { | |
438 | saw_extended_args = 1; | |
439 | if (strncasecmp("host=", extra_args, 5) == 0) { | |
440 | val = extra_args + 5; | |
441 | vallen = strlen(val) + 1; | |
442 | if (*val) { | |
eb30aed7 JL |
443 | /* Split <host>:<port> at colon. */ |
444 | char *host = val; | |
445 | char *port = strrchr(host, ':'); | |
dd467629 JL |
446 | if (port) { |
447 | *port = 0; | |
448 | port++; | |
eb30aed7 | 449 | interp_set_entry(table, INTERP_SLOT_PORT, port); |
dd467629 | 450 | } |
eb30aed7 | 451 | interp_set_entry(table, INTERP_SLOT_HOST, host); |
49ba83fb | 452 | } |
eb30aed7 | 453 | |
49ba83fb JL |
454 | /* On to the next one */ |
455 | extra_args = val + vallen; | |
456 | } | |
457 | } | |
458 | } | |
459 | ||
52fae7de | 460 | static void fill_in_extra_table_entries(struct interp *itable) |
dd467629 JL |
461 | { |
462 | char *hp; | |
dd467629 JL |
463 | |
464 | /* | |
465 | * Replace literal host with lowercase-ized hostname. | |
466 | */ | |
467 | hp = interp_table[INTERP_SLOT_HOST].value; | |
83543a24 JH |
468 | if (!hp) |
469 | return; | |
dd467629 JL |
470 | for ( ; *hp; hp++) |
471 | *hp = tolower(*hp); | |
472 | ||
473 | /* | |
474 | * Locate canonical hostname and its IP address. | |
475 | */ | |
476 | #ifndef NO_IPV6 | |
477 | { | |
478 | struct addrinfo hints; | |
479 | struct addrinfo *ai, *ai0; | |
480 | int gai; | |
481 | static char addrbuf[HOST_NAME_MAX + 1]; | |
482 | ||
483 | memset(&hints, 0, sizeof(hints)); | |
484 | hints.ai_flags = AI_CANONNAME; | |
485 | ||
486 | gai = getaddrinfo(interp_table[INTERP_SLOT_HOST].value, 0, &hints, &ai0); | |
487 | if (!gai) { | |
488 | for (ai = ai0; ai; ai = ai->ai_next) { | |
489 | struct sockaddr_in *sin_addr = (void *)ai->ai_addr; | |
490 | ||
dd467629 JL |
491 | inet_ntop(AF_INET, &sin_addr->sin_addr, |
492 | addrbuf, sizeof(addrbuf)); | |
eb30aed7 JL |
493 | interp_set_entry(interp_table, |
494 | INTERP_SLOT_CANON_HOST, ai->ai_canonname); | |
495 | interp_set_entry(interp_table, | |
496 | INTERP_SLOT_IP, addrbuf); | |
dd467629 JL |
497 | break; |
498 | } | |
499 | freeaddrinfo(ai0); | |
500 | } | |
501 | } | |
502 | #else | |
503 | { | |
504 | struct hostent *hent; | |
505 | struct sockaddr_in sa; | |
506 | char **ap; | |
507 | static char addrbuf[HOST_NAME_MAX + 1]; | |
508 | ||
509 | hent = gethostbyname(interp_table[INTERP_SLOT_HOST].value); | |
dd467629 JL |
510 | |
511 | ap = hent->h_addr_list; | |
512 | memset(&sa, 0, sizeof sa); | |
513 | sa.sin_family = hent->h_addrtype; | |
514 | sa.sin_port = htons(0); | |
515 | memcpy(&sa.sin_addr, *ap, hent->h_length); | |
516 | ||
517 | inet_ntop(hent->h_addrtype, &sa.sin_addr, | |
518 | addrbuf, sizeof(addrbuf)); | |
eb30aed7 JL |
519 | |
520 | interp_set_entry(interp_table, INTERP_SLOT_CANON_HOST, hent->h_name); | |
521 | interp_set_entry(interp_table, INTERP_SLOT_IP, addrbuf); | |
dd467629 JL |
522 | } |
523 | #endif | |
dd467629 JL |
524 | } |
525 | ||
526 | ||
5b276ee4 | 527 | static int execute(struct sockaddr *addr) |
a87e8be2 | 528 | { |
7d80694a | 529 | static char line[1000]; |
d819e4e6 | 530 | int pktlen, len, i; |
7d80694a | 531 | |
5b276ee4 DW |
532 | if (addr) { |
533 | char addrbuf[256] = ""; | |
534 | int port = -1; | |
535 | ||
536 | if (addr->sa_family == AF_INET) { | |
537 | struct sockaddr_in *sin_addr = (void *) addr; | |
538 | inet_ntop(addr->sa_family, &sin_addr->sin_addr, addrbuf, sizeof(addrbuf)); | |
539 | port = sin_addr->sin_port; | |
540 | #ifndef NO_IPV6 | |
541 | } else if (addr && addr->sa_family == AF_INET6) { | |
542 | struct sockaddr_in6 *sin6_addr = (void *) addr; | |
543 | ||
544 | char *buf = addrbuf; | |
545 | *buf++ = '['; *buf = '\0'; /* stpcpy() is cool */ | |
546 | inet_ntop(AF_INET6, &sin6_addr->sin6_addr, buf, sizeof(addrbuf) - 1); | |
547 | strcat(buf, "]"); | |
548 | ||
549 | port = sin6_addr->sin6_port; | |
550 | #endif | |
551 | } | |
552 | loginfo("Connection from %s:%d", addrbuf, port); | |
553 | } | |
554 | ||
960deccb | 555 | alarm(init_timeout ? init_timeout : timeout); |
5ad312be | 556 | pktlen = packet_read_line(0, line, sizeof(line)); |
960deccb | 557 | alarm(0); |
7d80694a | 558 | |
5ad312be JL |
559 | len = strlen(line); |
560 | if (pktlen != len) | |
561 | loginfo("Extended attributes (%d bytes) exist <%.*s>", | |
562 | (int) pktlen - len, | |
563 | (int) pktlen - len, line + len + 1); | |
83543a24 | 564 | if (len && line[len-1] == '\n') { |
7d80694a | 565 | line[--len] = 0; |
83543a24 JH |
566 | pktlen--; |
567 | } | |
7d80694a | 568 | |
eb30aed7 JL |
569 | /* |
570 | * Initialize the path interpolation table for this connection. | |
571 | */ | |
572 | interp_clear_table(interp_table, ARRAY_SIZE(interp_table)); | |
573 | interp_set_entry(interp_table, INTERP_SLOT_PERCENT, "%"); | |
574 | ||
dd467629 | 575 | if (len != pktlen) { |
eb30aed7 | 576 | parse_extra_args(interp_table, line + len + 1, pktlen - len - 1); |
dd467629 JL |
577 | fill_in_extra_table_entries(interp_table); |
578 | } | |
49ba83fb | 579 | |
d819e4e6 JH |
580 | for (i = 0; i < ARRAY_SIZE(daemon_service); i++) { |
581 | struct daemon_service *s = &(daemon_service[i]); | |
582 | int namelen = strlen(s->name); | |
599065a3 | 583 | if (!prefixcmp(line, "git-") && |
d819e4e6 | 584 | !strncmp(s->name, line + 4, namelen) && |
49ba83fb | 585 | line[namelen + 4] == ' ') { |
eb30aed7 JL |
586 | /* |
587 | * Note: The directory here is probably context sensitive, | |
588 | * and might depend on the actual service being performed. | |
589 | */ | |
590 | interp_set_entry(interp_table, | |
591 | INTERP_SLOT_DIR, line + namelen + 5); | |
49ba83fb JL |
592 | return run_service(interp_table, s); |
593 | } | |
d819e4e6 | 594 | } |
a87e8be2 | 595 | |
f8ff0c06 | 596 | logerror("Protocol error: '%s'", line); |
a87e8be2 LT |
597 | return -1; |
598 | } | |
599 | ||
66e631de LT |
600 | |
601 | /* | |
602 | * We count spawned/reaped separately, just to avoid any | |
603 | * races when updating them from signals. The SIGCHLD handler | |
604 | * will only update children_reaped, and the fork logic will | |
605 | * only update children_spawned. | |
606 | * | |
607 | * MAX_CHILDREN should be a power-of-two to make the modulus | |
608 | * operation cheap. It should also be at least twice | |
609 | * the maximum number of connections we will ever allow. | |
610 | */ | |
611 | #define MAX_CHILDREN 128 | |
612 | ||
613 | static int max_connections = 25; | |
614 | ||
615 | /* These are updated by the signal handler */ | |
96f1e58f | 616 | static volatile unsigned int children_reaped; |
4d8fa916 | 617 | static pid_t dead_child[MAX_CHILDREN]; |
66e631de LT |
618 | |
619 | /* These are updated by the main loop */ | |
96f1e58f DR |
620 | static unsigned int children_spawned; |
621 | static unsigned int children_deleted; | |
66e631de | 622 | |
4d8fa916 | 623 | static struct child { |
66e631de | 624 | pid_t pid; |
7fa09084 | 625 | int addrlen; |
df076bdb | 626 | struct sockaddr_storage address; |
66e631de LT |
627 | } live_child[MAX_CHILDREN]; |
628 | ||
7fa09084 | 629 | static void add_child(int idx, pid_t pid, struct sockaddr *addr, int addrlen) |
66e631de LT |
630 | { |
631 | live_child[idx].pid = pid; | |
632 | live_child[idx].addrlen = addrlen; | |
df076bdb | 633 | memcpy(&live_child[idx].address, addr, addrlen); |
66e631de LT |
634 | } |
635 | ||
636 | /* | |
637 | * Walk from "deleted" to "spawned", and remove child "pid". | |
638 | * | |
639 | * We move everything up by one, since the new "deleted" will | |
640 | * be one higher. | |
641 | */ | |
642 | static void remove_child(pid_t pid, unsigned deleted, unsigned spawned) | |
643 | { | |
644 | struct child n; | |
645 | ||
646 | deleted %= MAX_CHILDREN; | |
647 | spawned %= MAX_CHILDREN; | |
648 | if (live_child[deleted].pid == pid) { | |
649 | live_child[deleted].pid = -1; | |
650 | return; | |
651 | } | |
652 | n = live_child[deleted]; | |
653 | for (;;) { | |
654 | struct child m; | |
655 | deleted = (deleted + 1) % MAX_CHILDREN; | |
656 | if (deleted == spawned) | |
657 | die("could not find dead child %d\n", pid); | |
658 | m = live_child[deleted]; | |
659 | live_child[deleted] = n; | |
660 | if (m.pid == pid) | |
661 | return; | |
662 | n = m; | |
663 | } | |
664 | } | |
665 | ||
666 | /* | |
667 | * This gets called if the number of connections grows | |
668 | * past "max_connections". | |
669 | * | |
670 | * We _should_ start off by searching for connections | |
671 | * from the same IP, and if there is some address wth | |
672 | * multiple connections, we should kill that first. | |
673 | * | |
674 | * As it is, we just "randomly" kill 25% of the connections, | |
675 | * and our pseudo-random generator sucks too. I have no | |
676 | * shame. | |
677 | * | |
678 | * Really, this is just a place-holder for a _real_ algorithm. | |
679 | */ | |
02d57da4 | 680 | static void kill_some_children(int signo, unsigned start, unsigned stop) |
66e631de LT |
681 | { |
682 | start %= MAX_CHILDREN; | |
683 | stop %= MAX_CHILDREN; | |
684 | while (start != stop) { | |
685 | if (!(start & 3)) | |
02d57da4 | 686 | kill(live_child[start].pid, signo); |
66e631de LT |
687 | start = (start + 1) % MAX_CHILDREN; |
688 | } | |
689 | } | |
690 | ||
02d57da4 | 691 | static void check_max_connections(void) |
a87e8be2 | 692 | { |
02d57da4 | 693 | for (;;) { |
eaa94919 | 694 | int active; |
66e631de | 695 | unsigned spawned, reaped, deleted; |
eaa94919 | 696 | |
66e631de | 697 | spawned = children_spawned; |
66e631de LT |
698 | reaped = children_reaped; |
699 | deleted = children_deleted; | |
700 | ||
701 | while (deleted < reaped) { | |
702 | pid_t pid = dead_child[deleted % MAX_CHILDREN]; | |
703 | remove_child(pid, deleted, spawned); | |
704 | deleted++; | |
705 | } | |
706 | children_deleted = deleted; | |
707 | ||
708 | active = spawned - deleted; | |
02d57da4 LT |
709 | if (active <= max_connections) |
710 | break; | |
66e631de | 711 | |
02d57da4 LT |
712 | /* Kill some unstarted connections with SIGTERM */ |
713 | kill_some_children(SIGTERM, deleted, spawned); | |
714 | if (active <= max_connections << 1) | |
715 | break; | |
716 | ||
717 | /* If the SIGTERM thing isn't helping use SIGKILL */ | |
718 | kill_some_children(SIGKILL, deleted, spawned); | |
719 | sleep(1); | |
720 | } | |
721 | } | |
722 | ||
7fa09084 | 723 | static void handle(int incoming, struct sockaddr *addr, int addrlen) |
02d57da4 LT |
724 | { |
725 | pid_t pid = fork(); | |
726 | ||
727 | if (pid) { | |
728 | unsigned idx; | |
729 | ||
730 | close(incoming); | |
731 | if (pid < 0) | |
732 | return; | |
733 | ||
734 | idx = children_spawned % MAX_CHILDREN; | |
735 | children_spawned++; | |
736 | add_child(idx, pid, addr, addrlen); | |
66e631de | 737 | |
02d57da4 | 738 | check_max_connections(); |
a87e8be2 LT |
739 | return; |
740 | } | |
741 | ||
742 | dup2(incoming, 0); | |
743 | dup2(incoming, 1); | |
744 | close(incoming); | |
f8ff0c06 | 745 | |
5b276ee4 | 746 | exit(execute(addr)); |
a87e8be2 LT |
747 | } |
748 | ||
eaa94919 LT |
749 | static void child_handler(int signo) |
750 | { | |
751 | for (;;) { | |
9048fe1c PB |
752 | int status; |
753 | pid_t pid = waitpid(-1, &status, WNOHANG); | |
66e631de LT |
754 | |
755 | if (pid > 0) { | |
756 | unsigned reaped = children_reaped; | |
757 | dead_child[reaped % MAX_CHILDREN] = pid; | |
758 | children_reaped = reaped + 1; | |
f8ff0c06 | 759 | /* XXX: Custom logging, since we don't wanna getpid() */ |
9048fe1c | 760 | if (verbose) { |
554fe20d | 761 | const char *dead = ""; |
9048fe1c PB |
762 | if (!WIFEXITED(status) || WEXITSTATUS(status) > 0) |
763 | dead = " (with error)"; | |
764 | if (log_syslog) | |
765 | syslog(LOG_INFO, "[%d] Disconnected%s", pid, dead); | |
766 | else | |
767 | fprintf(stderr, "[%d] Disconnected%s\n", pid, dead); | |
768 | } | |
eaa94919 LT |
769 | continue; |
770 | } | |
771 | break; | |
772 | } | |
773 | } | |
774 | ||
1955fabf MW |
775 | static int set_reuse_addr(int sockfd) |
776 | { | |
777 | int on = 1; | |
778 | ||
779 | if (!reuseaddr) | |
780 | return 0; | |
781 | return setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, | |
782 | &on, sizeof(on)); | |
783 | } | |
784 | ||
6573faff PA |
785 | #ifndef NO_IPV6 |
786 | ||
dd467629 | 787 | static int socksetup(char *listen_addr, int listen_port, int **socklist_p) |
a87e8be2 | 788 | { |
df076bdb YH |
789 | int socknum = 0, *socklist = NULL; |
790 | int maxfd = -1; | |
df076bdb | 791 | char pbuf[NI_MAXSERV]; |
6573faff PA |
792 | struct addrinfo hints, *ai0, *ai; |
793 | int gai; | |
20276889 | 794 | long flags; |
df076bdb | 795 | |
dd467629 | 796 | sprintf(pbuf, "%d", listen_port); |
df076bdb YH |
797 | memset(&hints, 0, sizeof(hints)); |
798 | hints.ai_family = AF_UNSPEC; | |
799 | hints.ai_socktype = SOCK_STREAM; | |
800 | hints.ai_protocol = IPPROTO_TCP; | |
801 | hints.ai_flags = AI_PASSIVE; | |
802 | ||
dd467629 | 803 | gai = getaddrinfo(listen_addr, pbuf, &hints, &ai0); |
df076bdb YH |
804 | if (gai) |
805 | die("getaddrinfo() failed: %s\n", gai_strerror(gai)); | |
806 | ||
df076bdb YH |
807 | for (ai = ai0; ai; ai = ai->ai_next) { |
808 | int sockfd; | |
df076bdb YH |
809 | |
810 | sockfd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol); | |
811 | if (sockfd < 0) | |
812 | continue; | |
813 | if (sockfd >= FD_SETSIZE) { | |
814 | error("too large socket descriptor."); | |
815 | close(sockfd); | |
816 | continue; | |
817 | } | |
818 | ||
819 | #ifdef IPV6_V6ONLY | |
820 | if (ai->ai_family == AF_INET6) { | |
821 | int on = 1; | |
822 | setsockopt(sockfd, IPPROTO_IPV6, IPV6_V6ONLY, | |
823 | &on, sizeof(on)); | |
824 | /* Note: error is not fatal */ | |
825 | } | |
826 | #endif | |
827 | ||
1955fabf MW |
828 | if (set_reuse_addr(sockfd)) { |
829 | close(sockfd); | |
0032d548 | 830 | continue; |
1955fabf MW |
831 | } |
832 | ||
df076bdb YH |
833 | if (bind(sockfd, ai->ai_addr, ai->ai_addrlen) < 0) { |
834 | close(sockfd); | |
835 | continue; /* not fatal */ | |
836 | } | |
837 | if (listen(sockfd, 5) < 0) { | |
838 | close(sockfd); | |
839 | continue; /* not fatal */ | |
840 | } | |
841 | ||
20276889 AJ |
842 | flags = fcntl(sockfd, F_GETFD, 0); |
843 | if (flags >= 0) | |
844 | fcntl(sockfd, F_SETFD, flags | FD_CLOEXEC); | |
845 | ||
83572c1a | 846 | socklist = xrealloc(socklist, sizeof(int) * (socknum + 1)); |
df076bdb YH |
847 | socklist[socknum++] = sockfd; |
848 | ||
df076bdb YH |
849 | if (maxfd < sockfd) |
850 | maxfd = sockfd; | |
851 | } | |
852 | ||
853 | freeaddrinfo(ai0); | |
854 | ||
6573faff PA |
855 | *socklist_p = socklist; |
856 | return socknum; | |
857 | } | |
858 | ||
859 | #else /* NO_IPV6 */ | |
860 | ||
100690b6 | 861 | static int socksetup(char *listen_addr, int listen_port, int **socklist_p) |
6573faff PA |
862 | { |
863 | struct sockaddr_in sin; | |
864 | int sockfd; | |
20276889 | 865 | long flags; |
6573faff | 866 | |
dd467629 JL |
867 | memset(&sin, 0, sizeof sin); |
868 | sin.sin_family = AF_INET; | |
869 | sin.sin_port = htons(listen_port); | |
870 | ||
871 | if (listen_addr) { | |
872 | /* Well, host better be an IP address here. */ | |
873 | if (inet_pton(AF_INET, listen_addr, &sin.sin_addr.s_addr) <= 0) | |
874 | return 0; | |
875 | } else { | |
876 | sin.sin_addr.s_addr = htonl(INADDR_ANY); | |
877 | } | |
878 | ||
6573faff PA |
879 | sockfd = socket(AF_INET, SOCK_STREAM, 0); |
880 | if (sockfd < 0) | |
881 | return 0; | |
882 | ||
1955fabf MW |
883 | if (set_reuse_addr(sockfd)) { |
884 | close(sockfd); | |
885 | return 0; | |
886 | } | |
887 | ||
6573faff PA |
888 | if ( bind(sockfd, (struct sockaddr *)&sin, sizeof sin) < 0 ) { |
889 | close(sockfd); | |
890 | return 0; | |
891 | } | |
a87e8be2 | 892 | |
f35230fb PS |
893 | if (listen(sockfd, 5) < 0) { |
894 | close(sockfd); | |
895 | return 0; | |
896 | } | |
897 | ||
20276889 AJ |
898 | flags = fcntl(sockfd, F_GETFD, 0); |
899 | if (flags >= 0) | |
900 | fcntl(sockfd, F_SETFD, flags | FD_CLOEXEC); | |
901 | ||
1b4713fb | 902 | *socklist_p = xmalloc(sizeof(int)); |
6573faff | 903 | **socklist_p = sockfd; |
f35230fb | 904 | return 1; |
6573faff PA |
905 | } |
906 | ||
907 | #endif | |
908 | ||
909 | static int service_loop(int socknum, int *socklist) | |
910 | { | |
911 | struct pollfd *pfd; | |
912 | int i; | |
913 | ||
1b4713fb | 914 | pfd = xcalloc(socknum, sizeof(struct pollfd)); |
6573faff PA |
915 | |
916 | for (i = 0; i < socknum; i++) { | |
917 | pfd[i].fd = socklist[i]; | |
918 | pfd[i].events = POLLIN; | |
919 | } | |
9220282a PA |
920 | |
921 | signal(SIGCHLD, child_handler); | |
a87e8be2 LT |
922 | |
923 | for (;;) { | |
df076bdb | 924 | int i; |
6573faff | 925 | |
7872e055 | 926 | if (poll(pfd, socknum, -1) < 0) { |
1eef0b33 | 927 | if (errno != EINTR) { |
6573faff | 928 | error("poll failed, resuming: %s", |
1eef0b33 JH |
929 | strerror(errno)); |
930 | sleep(1); | |
931 | } | |
df076bdb YH |
932 | continue; |
933 | } | |
934 | ||
935 | for (i = 0; i < socknum; i++) { | |
6573faff | 936 | if (pfd[i].revents & POLLIN) { |
df076bdb | 937 | struct sockaddr_storage ss; |
7626e49e | 938 | unsigned int sslen = sizeof(ss); |
6573faff | 939 | int incoming = accept(pfd[i].fd, (struct sockaddr *)&ss, &sslen); |
df076bdb YH |
940 | if (incoming < 0) { |
941 | switch (errno) { | |
942 | case EAGAIN: | |
943 | case EINTR: | |
944 | case ECONNABORTED: | |
945 | continue; | |
946 | default: | |
947 | die("accept returned %s", strerror(errno)); | |
948 | } | |
949 | } | |
950 | handle(incoming, (struct sockaddr *)&ss, sslen); | |
a87e8be2 LT |
951 | } |
952 | } | |
a87e8be2 LT |
953 | } |
954 | } | |
955 | ||
258e93a1 ML |
956 | /* if any standard file descriptor is missing open it to /dev/null */ |
957 | static void sanitize_stdfds(void) | |
958 | { | |
959 | int fd = open("/dev/null", O_RDWR, 0); | |
960 | while (fd != -1 && fd < 2) | |
961 | fd = dup(fd); | |
962 | if (fd == -1) | |
963 | die("open /dev/null or dup failed: %s", strerror(errno)); | |
964 | if (fd > 2) | |
965 | close(fd); | |
966 | } | |
967 | ||
a5262768 ML |
968 | static void daemonize(void) |
969 | { | |
970 | switch (fork()) { | |
971 | case 0: | |
972 | break; | |
973 | case -1: | |
974 | die("fork failed: %s", strerror(errno)); | |
975 | default: | |
976 | exit(0); | |
977 | } | |
978 | if (setsid() == -1) | |
979 | die("setsid failed: %s", strerror(errno)); | |
980 | close(0); | |
981 | close(1); | |
982 | close(2); | |
983 | sanitize_stdfds(); | |
984 | } | |
985 | ||
45ed5d7f ML |
986 | static void store_pid(const char *path) |
987 | { | |
988 | FILE *f = fopen(path, "w"); | |
989 | if (!f) | |
990 | die("cannot open pid file %s: %s", path, strerror(errno)); | |
bc4e7d03 JM |
991 | if (fprintf(f, "%d\n", getpid()) < 0 || fclose(f) != 0) |
992 | die("failed to write pid file %s: %s", path, strerror(errno)); | |
45ed5d7f ML |
993 | } |
994 | ||
dd467629 | 995 | static int serve(char *listen_addr, int listen_port, struct passwd *pass, gid_t gid) |
6573faff PA |
996 | { |
997 | int socknum, *socklist; | |
4ae22d96 | 998 | |
dd467629 | 999 | socknum = socksetup(listen_addr, listen_port, &socklist); |
6573faff | 1000 | if (socknum == 0) |
dd467629 JL |
1001 | die("unable to allocate any listen sockets on host %s port %u", |
1002 | listen_addr, listen_port); | |
4ae22d96 | 1003 | |
678dac6b TS |
1004 | if (pass && gid && |
1005 | (initgroups(pass->pw_name, gid) || setgid (gid) || | |
1006 | setuid(pass->pw_uid))) | |
1007 | die("cannot drop privileges"); | |
1008 | ||
6573faff | 1009 | return service_loop(socknum, socklist); |
4ae22d96 | 1010 | } |
6573faff | 1011 | |
a87e8be2 LT |
1012 | int main(int argc, char **argv) |
1013 | { | |
dd467629 JL |
1014 | int listen_port = 0; |
1015 | char *listen_addr = NULL; | |
e64e1b79 | 1016 | int inetd_mode = 0; |
678dac6b | 1017 | const char *pid_file = NULL, *user_name = NULL, *group_name = NULL; |
a5262768 | 1018 | int detach = 0; |
678dac6b TS |
1019 | struct passwd *pass = NULL; |
1020 | struct group *group; | |
1021 | gid_t gid = 0; | |
a87e8be2 LT |
1022 | int i; |
1023 | ||
f0b7367c JH |
1024 | /* Without this we cannot rely on waitpid() to tell |
1025 | * what happened to our children. | |
1026 | */ | |
1027 | signal(SIGCHLD, SIG_DFL); | |
1028 | ||
a87e8be2 LT |
1029 | for (i = 1; i < argc; i++) { |
1030 | char *arg = argv[i]; | |
1031 | ||
cc44c765 | 1032 | if (!prefixcmp(arg, "--listen=")) { |
dd467629 JL |
1033 | char *p = arg + 9; |
1034 | char *ph = listen_addr = xmalloc(strlen(arg + 9) + 1); | |
1035 | while (*p) | |
1036 | *ph++ = tolower(*p++); | |
1037 | *ph = 0; | |
1038 | continue; | |
1039 | } | |
cc44c765 | 1040 | if (!prefixcmp(arg, "--port=")) { |
a87e8be2 LT |
1041 | char *end; |
1042 | unsigned long n; | |
1043 | n = strtoul(arg+7, &end, 0); | |
1044 | if (arg[7] && !*end) { | |
dd467629 | 1045 | listen_port = n; |
a87e8be2 LT |
1046 | continue; |
1047 | } | |
1048 | } | |
e64e1b79 LT |
1049 | if (!strcmp(arg, "--inetd")) { |
1050 | inetd_mode = 1; | |
a8883288 | 1051 | log_syslog = 1; |
e64e1b79 LT |
1052 | continue; |
1053 | } | |
f8ff0c06 PB |
1054 | if (!strcmp(arg, "--verbose")) { |
1055 | verbose = 1; | |
1056 | continue; | |
1057 | } | |
9048fe1c PB |
1058 | if (!strcmp(arg, "--syslog")) { |
1059 | log_syslog = 1; | |
9048fe1c PB |
1060 | continue; |
1061 | } | |
4ae95682 PA |
1062 | if (!strcmp(arg, "--export-all")) { |
1063 | export_all_trees = 1; | |
1064 | continue; | |
1065 | } | |
cc44c765 | 1066 | if (!prefixcmp(arg, "--timeout=")) { |
960deccb | 1067 | timeout = atoi(arg+10); |
a8883288 | 1068 | continue; |
960deccb | 1069 | } |
cc44c765 | 1070 | if (!prefixcmp(arg, "--init-timeout=")) { |
960deccb | 1071 | init_timeout = atoi(arg+15); |
a8883288 | 1072 | continue; |
960deccb | 1073 | } |
4dbd1352 AE |
1074 | if (!strcmp(arg, "--strict-paths")) { |
1075 | strict_paths = 1; | |
1076 | continue; | |
1077 | } | |
cc44c765 | 1078 | if (!prefixcmp(arg, "--base-path=")) { |
b21c31c9 PB |
1079 | base_path = arg+12; |
1080 | continue; | |
1081 | } | |
73a7a656 JA |
1082 | if (!strcmp(arg, "--base-path-relaxed")) { |
1083 | base_path_relaxed = 1; | |
1084 | continue; | |
1085 | } | |
cc44c765 | 1086 | if (!prefixcmp(arg, "--interpolated-path=")) { |
49ba83fb JL |
1087 | interpolated_path = arg+20; |
1088 | continue; | |
1089 | } | |
1955fabf MW |
1090 | if (!strcmp(arg, "--reuseaddr")) { |
1091 | reuseaddr = 1; | |
1092 | continue; | |
1093 | } | |
603968d2 JH |
1094 | if (!strcmp(arg, "--user-path")) { |
1095 | user_path = ""; | |
1096 | continue; | |
1097 | } | |
cc44c765 | 1098 | if (!prefixcmp(arg, "--user-path=")) { |
603968d2 JH |
1099 | user_path = arg + 12; |
1100 | continue; | |
1101 | } | |
cc44c765 | 1102 | if (!prefixcmp(arg, "--pid-file=")) { |
45ed5d7f ML |
1103 | pid_file = arg + 11; |
1104 | continue; | |
1105 | } | |
a5262768 ML |
1106 | if (!strcmp(arg, "--detach")) { |
1107 | detach = 1; | |
1108 | log_syslog = 1; | |
1109 | continue; | |
1110 | } | |
cc44c765 | 1111 | if (!prefixcmp(arg, "--user=")) { |
678dac6b TS |
1112 | user_name = arg + 7; |
1113 | continue; | |
1114 | } | |
cc44c765 | 1115 | if (!prefixcmp(arg, "--group=")) { |
678dac6b TS |
1116 | group_name = arg + 8; |
1117 | continue; | |
1118 | } | |
cc44c765 | 1119 | if (!prefixcmp(arg, "--enable=")) { |
d819e4e6 JH |
1120 | enable_service(arg + 9, 1); |
1121 | continue; | |
1122 | } | |
cc44c765 | 1123 | if (!prefixcmp(arg, "--disable=")) { |
d819e4e6 JH |
1124 | enable_service(arg + 10, 0); |
1125 | continue; | |
1126 | } | |
cc44c765 | 1127 | if (!prefixcmp(arg, "--allow-override=")) { |
74c0cc21 | 1128 | make_service_overridable(arg + 17, 1); |
d819e4e6 JH |
1129 | continue; |
1130 | } | |
cc44c765 | 1131 | if (!prefixcmp(arg, "--forbid-override=")) { |
74c0cc21 | 1132 | make_service_overridable(arg + 18, 0); |
d819e4e6 JH |
1133 | continue; |
1134 | } | |
4ae95682 PA |
1135 | if (!strcmp(arg, "--")) { |
1136 | ok_paths = &argv[i+1]; | |
1137 | break; | |
1138 | } else if (arg[0] != '-') { | |
1139 | ok_paths = &argv[i]; | |
1140 | break; | |
1141 | } | |
e64e1b79 | 1142 | |
a87e8be2 LT |
1143 | usage(daemon_usage); |
1144 | } | |
1145 | ||
678dac6b TS |
1146 | if (inetd_mode && (group_name || user_name)) |
1147 | die("--user and --group are incompatible with --inetd"); | |
1148 | ||
dd467629 JL |
1149 | if (inetd_mode && (listen_port || listen_addr)) |
1150 | die("--listen= and --port= are incompatible with --inetd"); | |
1151 | else if (listen_port == 0) | |
1152 | listen_port = DEFAULT_GIT_PORT; | |
1153 | ||
678dac6b TS |
1154 | if (group_name && !user_name) |
1155 | die("--group supplied without --user"); | |
1156 | ||
1157 | if (user_name) { | |
1158 | pass = getpwnam(user_name); | |
1159 | if (!pass) | |
1160 | die("user not found - %s", user_name); | |
1161 | ||
1162 | if (!group_name) | |
1163 | gid = pass->pw_gid; | |
1164 | else { | |
1165 | group = getgrnam(group_name); | |
1166 | if (!group) | |
1167 | die("group not found - %s", group_name); | |
1168 | ||
1169 | gid = group->gr_gid; | |
1170 | } | |
1171 | } | |
1172 | ||
ad8b4f56 | 1173 | if (log_syslog) { |
a8883288 | 1174 | openlog("git-daemon", 0, LOG_DAEMON); |
ad8b4f56 | 1175 | set_die_routine(daemon_die); |
4dbd1352 AE |
1176 | } |
1177 | ||
ad8b4f56 ML |
1178 | if (strict_paths && (!ok_paths || !*ok_paths)) |
1179 | die("option --strict-paths requires a whitelist"); | |
1180 | ||
7c3693f1 | 1181 | if (inetd_mode) { |
5b276ee4 DW |
1182 | struct sockaddr_storage ss; |
1183 | struct sockaddr *peer = (struct sockaddr *)&ss; | |
1184 | socklen_t slen = sizeof(ss); | |
1185 | ||
ba0012c3 | 1186 | freopen("/dev/null", "w", stderr); |
5b276ee4 DW |
1187 | |
1188 | if (getpeername(0, peer, &slen)) | |
1189 | peer = NULL; | |
1190 | ||
1191 | return execute(peer); | |
7c3693f1 | 1192 | } |
bce8230d | 1193 | |
a5262768 ML |
1194 | if (detach) |
1195 | daemonize(); | |
1196 | else | |
1197 | sanitize_stdfds(); | |
258e93a1 | 1198 | |
45ed5d7f ML |
1199 | if (pid_file) |
1200 | store_pid(pid_file); | |
1201 | ||
dd467629 | 1202 | return serve(listen_addr, listen_port, pass, gid); |
a87e8be2 | 1203 | } |