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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" |
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" |
603968d2 | 19 | " [--base-path=path] [--user-path | --user-path=path]\n" |
49ba83fb | 20 | " [--interpolated-path=path]\n" |
678dac6b | 21 | " [--reuseaddr] [--detach] [--pid-file=file]\n" |
d9edcbd6 | 22 | " [--[enable|disable|allow-override|forbid-override]=service]\n" |
dd467629 JL |
23 | " [--inetd | [--listen=host_or_ipaddr] [--port=n]\n" |
24 | " [--user=user [--group=group]]\n" | |
25 | " [directory...]"; | |
4ae95682 PA |
26 | |
27 | /* List of acceptable pathname prefixes */ | |
96f1e58f DR |
28 | static char **ok_paths; |
29 | static int strict_paths; | |
4ae95682 PA |
30 | |
31 | /* If this is set, git-daemon-export-ok is not required */ | |
96f1e58f | 32 | static int export_all_trees; |
f8ff0c06 | 33 | |
b21c31c9 | 34 | /* Take all paths relative to this one if non-NULL */ |
96f1e58f | 35 | static char *base_path; |
49ba83fb JL |
36 | static char *interpolated_path; |
37 | ||
38 | /* Flag indicating client sent extra args. */ | |
39 | static int saw_extended_args; | |
b21c31c9 | 40 | |
603968d2 JH |
41 | /* If defined, ~user notation is allowed and the string is inserted |
42 | * after ~user/. E.g. a request to git://host/~alice/frotz would | |
43 | * go to /home/alice/pub_git/frotz with --user-path=pub_git. | |
44 | */ | |
96f1e58f | 45 | static const char *user_path; |
603968d2 | 46 | |
960deccb | 47 | /* Timeout, and initial timeout */ |
96f1e58f DR |
48 | static unsigned int timeout; |
49 | static unsigned int init_timeout; | |
f8ff0c06 | 50 | |
49ba83fb JL |
51 | /* |
52 | * Static table for now. Ugh. | |
53 | * Feel free to make dynamic as needed. | |
54 | */ | |
55 | #define INTERP_SLOT_HOST (0) | |
dd467629 JL |
56 | #define INTERP_SLOT_CANON_HOST (1) |
57 | #define INTERP_SLOT_IP (2) | |
58 | #define INTERP_SLOT_PORT (3) | |
59 | #define INTERP_SLOT_DIR (4) | |
60 | #define INTERP_SLOT_PERCENT (5) | |
49ba83fb JL |
61 | |
62 | static struct interp interp_table[] = { | |
63 | { "%H", 0}, | |
dd467629 JL |
64 | { "%CH", 0}, |
65 | { "%IP", 0}, | |
66 | { "%P", 0}, | |
49ba83fb | 67 | { "%D", 0}, |
eb30aed7 | 68 | { "%%", 0}, |
49ba83fb JL |
69 | }; |
70 | ||
71 | ||
9048fe1c | 72 | static void logreport(int priority, const char *err, va_list params) |
f8ff0c06 PB |
73 | { |
74 | /* We should do a single write so that it is atomic and output | |
75 | * of several processes do not get intermingled. */ | |
76 | char buf[1024]; | |
77 | int buflen; | |
78 | int maxlen, msglen; | |
79 | ||
80 | /* sizeof(buf) should be big enough for "[pid] \n" */ | |
1bedd4ca | 81 | buflen = snprintf(buf, sizeof(buf), "[%ld] ", (long) getpid()); |
f8ff0c06 PB |
82 | |
83 | maxlen = sizeof(buf) - buflen - 1; /* -1 for our own LF */ | |
84 | msglen = vsnprintf(buf + buflen, maxlen, err, params); | |
85 | ||
9048fe1c PB |
86 | if (log_syslog) { |
87 | syslog(priority, "%s", buf); | |
88 | return; | |
89 | } | |
90 | ||
f8ff0c06 PB |
91 | /* maxlen counted our own LF but also counts space given to |
92 | * vsnprintf for the terminating NUL. We want to make sure that | |
93 | * we have space for our own LF and NUL after the "meat" of the | |
94 | * message, so truncate it at maxlen - 1. | |
95 | */ | |
96 | if (msglen > maxlen - 1) | |
97 | msglen = maxlen - 1; | |
98 | else if (msglen < 0) | |
99 | msglen = 0; /* Protect against weird return values. */ | |
100 | buflen += msglen; | |
101 | ||
102 | buf[buflen++] = '\n'; | |
103 | buf[buflen] = '\0'; | |
104 | ||
105 | write(2, buf, buflen); | |
106 | } | |
107 | ||
cdda4745 | 108 | static void logerror(const char *err, ...) |
f8ff0c06 PB |
109 | { |
110 | va_list params; | |
111 | va_start(params, err); | |
9048fe1c | 112 | logreport(LOG_ERR, err, params); |
f8ff0c06 PB |
113 | va_end(params); |
114 | } | |
115 | ||
cdda4745 | 116 | static void loginfo(const char *err, ...) |
f8ff0c06 PB |
117 | { |
118 | va_list params; | |
119 | if (!verbose) | |
120 | return; | |
121 | va_start(params, err); | |
9048fe1c | 122 | logreport(LOG_INFO, err, params); |
f8ff0c06 PB |
123 | va_end(params); |
124 | } | |
a87e8be2 | 125 | |
ad8b4f56 ML |
126 | static void NORETURN daemon_die(const char *err, va_list params) |
127 | { | |
128 | logreport(LOG_ERR, err, params); | |
129 | exit(1); | |
130 | } | |
131 | ||
d79374c7 JH |
132 | static int avoid_alias(char *p) |
133 | { | |
134 | int sl, ndot; | |
135 | ||
136 | /* | |
137 | * This resurrects the belts and suspenders paranoia check by HPA | |
138 | * done in <435560F7.4080006@zytor.com> thread, now enter_repo() | |
139 | * does not do getcwd() based path canonicalizations. | |
140 | * | |
141 | * sl becomes true immediately after seeing '/' and continues to | |
142 | * be true as long as dots continue after that without intervening | |
143 | * non-dot character. | |
144 | */ | |
145 | if (!p || (*p != '/' && *p != '~')) | |
146 | return -1; | |
147 | sl = 1; ndot = 0; | |
148 | p++; | |
149 | ||
150 | while (1) { | |
151 | char ch = *p++; | |
152 | if (sl) { | |
153 | if (ch == '.') | |
154 | ndot++; | |
155 | else if (ch == '/') { | |
156 | if (ndot < 3) | |
157 | /* reject //, /./ and /../ */ | |
158 | return -1; | |
159 | ndot = 0; | |
160 | } | |
161 | else if (ch == 0) { | |
162 | if (0 < ndot && ndot < 3) | |
163 | /* reject /.$ and /..$ */ | |
164 | return -1; | |
165 | return 0; | |
166 | } | |
167 | else | |
168 | sl = ndot = 0; | |
169 | } | |
170 | else if (ch == 0) | |
171 | return 0; | |
172 | else if (ch == '/') { | |
173 | sl = 1; | |
174 | ndot = 0; | |
175 | } | |
176 | } | |
177 | } | |
178 | ||
49ba83fb | 179 | static char *path_ok(struct interp *itable) |
4ae95682 | 180 | { |
603968d2 | 181 | static char rpath[PATH_MAX]; |
49ba83fb | 182 | static char interp_path[PATH_MAX]; |
d79374c7 | 183 | char *path; |
49ba83fb JL |
184 | char *dir; |
185 | ||
186 | dir = itable[INTERP_SLOT_DIR].value; | |
d79374c7 JH |
187 | |
188 | if (avoid_alias(dir)) { | |
189 | logerror("'%s': aliased", dir); | |
190 | return NULL; | |
191 | } | |
192 | ||
603968d2 JH |
193 | if (*dir == '~') { |
194 | if (!user_path) { | |
195 | logerror("'%s': User-path not allowed", dir); | |
196 | return NULL; | |
197 | } | |
198 | if (*user_path) { | |
199 | /* Got either "~alice" or "~alice/foo"; | |
200 | * rewrite them to "~alice/%s" or | |
201 | * "~alice/%s/foo". | |
202 | */ | |
203 | int namlen, restlen = strlen(dir); | |
204 | char *slash = strchr(dir, '/'); | |
205 | if (!slash) | |
206 | slash = dir + restlen; | |
207 | namlen = slash - dir; | |
208 | restlen -= namlen; | |
209 | loginfo("userpath <%s>, request <%s>, namlen %d, restlen %d, slash <%s>", user_path, dir, namlen, restlen, slash); | |
210 | snprintf(rpath, PATH_MAX, "%.*s/%s%.*s", | |
211 | namlen, dir, user_path, restlen, slash); | |
212 | dir = rpath; | |
213 | } | |
214 | } | |
49ba83fb JL |
215 | else if (interpolated_path && saw_extended_args) { |
216 | if (*dir != '/') { | |
217 | /* Allow only absolute */ | |
218 | logerror("'%s': Non-absolute path denied (interpolated-path active)", dir); | |
219 | return NULL; | |
220 | } | |
221 | ||
222 | interpolate(interp_path, PATH_MAX, interpolated_path, | |
223 | interp_table, ARRAY_SIZE(interp_table)); | |
224 | loginfo("Interpolated dir '%s'", interp_path); | |
225 | ||
226 | dir = interp_path; | |
227 | } | |
603968d2 JH |
228 | else if (base_path) { |
229 | if (*dir != '/') { | |
230 | /* Allow only absolute */ | |
1fda3d55 | 231 | logerror("'%s': Non-absolute path denied (base-path active)", dir); |
b21c31c9 PB |
232 | return NULL; |
233 | } | |
49ba83fb JL |
234 | snprintf(rpath, PATH_MAX, "%s%s", base_path, dir); |
235 | dir = rpath; | |
b21c31c9 PB |
236 | } |
237 | ||
d79374c7 | 238 | path = enter_repo(dir, strict_paths); |
3e04c62d | 239 | |
4dbd1352 AE |
240 | if (!path) { |
241 | logerror("'%s': unable to chdir or not a git archive", dir); | |
242 | return NULL; | |
4ae95682 PA |
243 | } |
244 | ||
245 | if ( ok_paths && *ok_paths ) { | |
ce335fe0 | 246 | char **pp; |
4dbd1352 | 247 | int pathlen = strlen(path); |
4ae95682 | 248 | |
ce335fe0 | 249 | /* The validation is done on the paths after enter_repo |
d79374c7 JH |
250 | * appends optional {.git,.git/.git} and friends, but |
251 | * it does not use getcwd(). So if your /pub is | |
252 | * a symlink to /mnt/pub, you can whitelist /pub and | |
253 | * do not have to say /mnt/pub. | |
254 | * Do not say /pub/. | |
ce335fe0 | 255 | */ |
4ae95682 PA |
256 | for ( pp = ok_paths ; *pp ; pp++ ) { |
257 | int len = strlen(*pp); | |
ce335fe0 JH |
258 | if (len <= pathlen && |
259 | !memcmp(*pp, path, len) && | |
260 | (path[len] == '\0' || | |
261 | (!strict_paths && path[len] == '/'))) | |
262 | return path; | |
4ae95682 | 263 | } |
4dbd1352 AE |
264 | } |
265 | else { | |
266 | /* be backwards compatible */ | |
267 | if (!strict_paths) | |
268 | return path; | |
4ae95682 PA |
269 | } |
270 | ||
4dbd1352 AE |
271 | logerror("'%s': not in whitelist", path); |
272 | return NULL; /* Fallthrough. Deny by default */ | |
4ae95682 | 273 | } |
a87e8be2 | 274 | |
d819e4e6 JH |
275 | typedef int (*daemon_service_fn)(void); |
276 | struct daemon_service { | |
277 | const char *name; | |
278 | const char *config_name; | |
279 | daemon_service_fn fn; | |
280 | int enabled; | |
281 | int overridable; | |
282 | }; | |
283 | ||
284 | static struct daemon_service *service_looking_at; | |
285 | static int service_enabled; | |
286 | ||
287 | static int git_daemon_config(const char *var, const char *value) | |
288 | { | |
289 | if (!strncmp(var, "daemon.", 7) && | |
290 | !strcmp(var + 7, service_looking_at->config_name)) { | |
291 | service_enabled = git_config_bool(var, value); | |
292 | return 0; | |
293 | } | |
294 | ||
295 | /* we are not interested in parsing any other configuration here */ | |
296 | return 0; | |
297 | } | |
298 | ||
49ba83fb | 299 | static int run_service(struct interp *itable, struct daemon_service *service) |
a87e8be2 | 300 | { |
4dbd1352 | 301 | const char *path; |
d819e4e6 JH |
302 | int enabled = service->enabled; |
303 | ||
49ba83fb JL |
304 | loginfo("Request %s for '%s'", |
305 | service->name, | |
306 | itable[INTERP_SLOT_DIR].value); | |
4dbd1352 | 307 | |
d819e4e6 JH |
308 | if (!enabled && !service->overridable) { |
309 | logerror("'%s': service not enabled.", service->name); | |
310 | errno = EACCES; | |
311 | return -1; | |
312 | } | |
4ae95682 | 313 | |
49ba83fb | 314 | if (!(path = path_ok(itable))) |
a87e8be2 | 315 | return -1; |
47888f0f | 316 | |
a87e8be2 LT |
317 | /* |
318 | * Security on the cheap. | |
319 | * | |
a935c397 | 320 | * We want a readable HEAD, usable "objects" directory, and |
a87e8be2 LT |
321 | * a "git-daemon-export-ok" flag that says that the other side |
322 | * is ok with us doing this. | |
4dbd1352 AE |
323 | * |
324 | * path_ok() uses enter_repo() and does whitelist checking. | |
325 | * We only need to make sure the repository is exported. | |
a87e8be2 | 326 | */ |
4dbd1352 | 327 | |
3e04c62d | 328 | if (!export_all_trees && access("git-daemon-export-ok", F_OK)) { |
4dbd1352 | 329 | logerror("'%s': repository not exported.", path); |
3e04c62d PA |
330 | errno = EACCES; |
331 | return -1; | |
332 | } | |
333 | ||
d819e4e6 JH |
334 | if (service->overridable) { |
335 | service_looking_at = service; | |
336 | service_enabled = -1; | |
337 | git_config(git_daemon_config); | |
338 | if (0 <= service_enabled) | |
339 | enabled = service_enabled; | |
340 | } | |
341 | if (!enabled) { | |
342 | logerror("'%s': service not enabled for '%s'", | |
343 | service->name, path); | |
344 | errno = EACCES; | |
345 | return -1; | |
346 | } | |
347 | ||
02d57da4 LT |
348 | /* |
349 | * We'll ignore SIGTERM from now on, we have a | |
350 | * good client. | |
351 | */ | |
352 | signal(SIGTERM, SIG_IGN); | |
353 | ||
d819e4e6 JH |
354 | return service->fn(); |
355 | } | |
356 | ||
357 | static int upload_pack(void) | |
358 | { | |
359 | /* Timeout as string */ | |
360 | char timeout_buf[64]; | |
361 | ||
960deccb PA |
362 | snprintf(timeout_buf, sizeof timeout_buf, "--timeout=%u", timeout); |
363 | ||
a87e8be2 | 364 | /* git-upload-pack only ever reads stuff, so this is safe */ |
77cb17e9 | 365 | execl_git_cmd("upload-pack", "--strict", timeout_buf, ".", NULL); |
a87e8be2 LT |
366 | return -1; |
367 | } | |
368 | ||
39345a21 FBH |
369 | static int upload_archive(void) |
370 | { | |
371 | execl_git_cmd("upload-archive", ".", NULL); | |
372 | return -1; | |
373 | } | |
374 | ||
d819e4e6 | 375 | static struct daemon_service daemon_service[] = { |
39345a21 | 376 | { "upload-archive", "uploadarch", upload_archive, 0, 1 }, |
d819e4e6 JH |
377 | { "upload-pack", "uploadpack", upload_pack, 1, 1 }, |
378 | }; | |
379 | ||
380 | static void enable_service(const char *name, int ena) { | |
381 | int i; | |
382 | for (i = 0; i < ARRAY_SIZE(daemon_service); i++) { | |
383 | if (!strcmp(daemon_service[i].name, name)) { | |
384 | daemon_service[i].enabled = ena; | |
385 | return; | |
386 | } | |
387 | } | |
388 | die("No such service %s", name); | |
389 | } | |
390 | ||
391 | static void make_service_overridable(const char *name, int ena) { | |
392 | int i; | |
393 | for (i = 0; i < ARRAY_SIZE(daemon_service); i++) { | |
394 | if (!strcmp(daemon_service[i].name, name)) { | |
395 | daemon_service[i].overridable = ena; | |
396 | return; | |
397 | } | |
398 | } | |
399 | die("No such service %s", name); | |
400 | } | |
401 | ||
eb30aed7 JL |
402 | /* |
403 | * Separate the "extra args" information as supplied by the client connection. | |
404 | * Any resulting data is squirrelled away in the given interpolation table. | |
405 | */ | |
406 | static void parse_extra_args(struct interp *table, char *extra_args, int buflen) | |
49ba83fb JL |
407 | { |
408 | char *val; | |
409 | int vallen; | |
410 | char *end = extra_args + buflen; | |
411 | ||
412 | while (extra_args < end && *extra_args) { | |
413 | saw_extended_args = 1; | |
414 | if (strncasecmp("host=", extra_args, 5) == 0) { | |
415 | val = extra_args + 5; | |
416 | vallen = strlen(val) + 1; | |
417 | if (*val) { | |
eb30aed7 JL |
418 | /* Split <host>:<port> at colon. */ |
419 | char *host = val; | |
420 | char *port = strrchr(host, ':'); | |
dd467629 JL |
421 | if (port) { |
422 | *port = 0; | |
423 | port++; | |
eb30aed7 | 424 | interp_set_entry(table, INTERP_SLOT_PORT, port); |
dd467629 | 425 | } |
eb30aed7 | 426 | interp_set_entry(table, INTERP_SLOT_HOST, host); |
49ba83fb | 427 | } |
eb30aed7 | 428 | |
49ba83fb JL |
429 | /* On to the next one */ |
430 | extra_args = val + vallen; | |
431 | } | |
432 | } | |
433 | } | |
434 | ||
dd467629 JL |
435 | void fill_in_extra_table_entries(struct interp *itable) |
436 | { | |
437 | char *hp; | |
dd467629 JL |
438 | |
439 | /* | |
440 | * Replace literal host with lowercase-ized hostname. | |
441 | */ | |
442 | hp = interp_table[INTERP_SLOT_HOST].value; | |
83543a24 JH |
443 | if (!hp) |
444 | return; | |
dd467629 JL |
445 | for ( ; *hp; hp++) |
446 | *hp = tolower(*hp); | |
447 | ||
448 | /* | |
449 | * Locate canonical hostname and its IP address. | |
450 | */ | |
451 | #ifndef NO_IPV6 | |
452 | { | |
453 | struct addrinfo hints; | |
454 | struct addrinfo *ai, *ai0; | |
455 | int gai; | |
456 | static char addrbuf[HOST_NAME_MAX + 1]; | |
457 | ||
458 | memset(&hints, 0, sizeof(hints)); | |
459 | hints.ai_flags = AI_CANONNAME; | |
460 | ||
461 | gai = getaddrinfo(interp_table[INTERP_SLOT_HOST].value, 0, &hints, &ai0); | |
462 | if (!gai) { | |
463 | for (ai = ai0; ai; ai = ai->ai_next) { | |
464 | struct sockaddr_in *sin_addr = (void *)ai->ai_addr; | |
465 | ||
dd467629 JL |
466 | inet_ntop(AF_INET, &sin_addr->sin_addr, |
467 | addrbuf, sizeof(addrbuf)); | |
eb30aed7 JL |
468 | interp_set_entry(interp_table, |
469 | INTERP_SLOT_CANON_HOST, ai->ai_canonname); | |
470 | interp_set_entry(interp_table, | |
471 | INTERP_SLOT_IP, addrbuf); | |
dd467629 JL |
472 | break; |
473 | } | |
474 | freeaddrinfo(ai0); | |
475 | } | |
476 | } | |
477 | #else | |
478 | { | |
479 | struct hostent *hent; | |
480 | struct sockaddr_in sa; | |
481 | char **ap; | |
482 | static char addrbuf[HOST_NAME_MAX + 1]; | |
483 | ||
484 | hent = gethostbyname(interp_table[INTERP_SLOT_HOST].value); | |
dd467629 JL |
485 | |
486 | ap = hent->h_addr_list; | |
487 | memset(&sa, 0, sizeof sa); | |
488 | sa.sin_family = hent->h_addrtype; | |
489 | sa.sin_port = htons(0); | |
490 | memcpy(&sa.sin_addr, *ap, hent->h_length); | |
491 | ||
492 | inet_ntop(hent->h_addrtype, &sa.sin_addr, | |
493 | addrbuf, sizeof(addrbuf)); | |
eb30aed7 JL |
494 | |
495 | interp_set_entry(interp_table, INTERP_SLOT_CANON_HOST, hent->h_name); | |
496 | interp_set_entry(interp_table, INTERP_SLOT_IP, addrbuf); | |
dd467629 JL |
497 | } |
498 | #endif | |
dd467629 JL |
499 | } |
500 | ||
501 | ||
5b276ee4 | 502 | static int execute(struct sockaddr *addr) |
a87e8be2 | 503 | { |
7d80694a | 504 | static char line[1000]; |
d819e4e6 | 505 | int pktlen, len, i; |
7d80694a | 506 | |
5b276ee4 DW |
507 | if (addr) { |
508 | char addrbuf[256] = ""; | |
509 | int port = -1; | |
510 | ||
511 | if (addr->sa_family == AF_INET) { | |
512 | struct sockaddr_in *sin_addr = (void *) addr; | |
513 | inet_ntop(addr->sa_family, &sin_addr->sin_addr, addrbuf, sizeof(addrbuf)); | |
514 | port = sin_addr->sin_port; | |
515 | #ifndef NO_IPV6 | |
516 | } else if (addr && addr->sa_family == AF_INET6) { | |
517 | struct sockaddr_in6 *sin6_addr = (void *) addr; | |
518 | ||
519 | char *buf = addrbuf; | |
520 | *buf++ = '['; *buf = '\0'; /* stpcpy() is cool */ | |
521 | inet_ntop(AF_INET6, &sin6_addr->sin6_addr, buf, sizeof(addrbuf) - 1); | |
522 | strcat(buf, "]"); | |
523 | ||
524 | port = sin6_addr->sin6_port; | |
525 | #endif | |
526 | } | |
527 | loginfo("Connection from %s:%d", addrbuf, port); | |
528 | } | |
529 | ||
960deccb | 530 | alarm(init_timeout ? init_timeout : timeout); |
5ad312be | 531 | pktlen = packet_read_line(0, line, sizeof(line)); |
960deccb | 532 | alarm(0); |
7d80694a | 533 | |
5ad312be JL |
534 | len = strlen(line); |
535 | if (pktlen != len) | |
536 | loginfo("Extended attributes (%d bytes) exist <%.*s>", | |
537 | (int) pktlen - len, | |
538 | (int) pktlen - len, line + len + 1); | |
83543a24 | 539 | if (len && line[len-1] == '\n') { |
7d80694a | 540 | line[--len] = 0; |
83543a24 JH |
541 | pktlen--; |
542 | } | |
7d80694a | 543 | |
eb30aed7 JL |
544 | /* |
545 | * Initialize the path interpolation table for this connection. | |
546 | */ | |
547 | interp_clear_table(interp_table, ARRAY_SIZE(interp_table)); | |
548 | interp_set_entry(interp_table, INTERP_SLOT_PERCENT, "%"); | |
549 | ||
dd467629 | 550 | if (len != pktlen) { |
eb30aed7 | 551 | parse_extra_args(interp_table, line + len + 1, pktlen - len - 1); |
dd467629 JL |
552 | fill_in_extra_table_entries(interp_table); |
553 | } | |
49ba83fb | 554 | |
d819e4e6 JH |
555 | for (i = 0; i < ARRAY_SIZE(daemon_service); i++) { |
556 | struct daemon_service *s = &(daemon_service[i]); | |
557 | int namelen = strlen(s->name); | |
558 | if (!strncmp("git-", line, 4) && | |
559 | !strncmp(s->name, line + 4, namelen) && | |
49ba83fb | 560 | line[namelen + 4] == ' ') { |
eb30aed7 JL |
561 | /* |
562 | * Note: The directory here is probably context sensitive, | |
563 | * and might depend on the actual service being performed. | |
564 | */ | |
565 | interp_set_entry(interp_table, | |
566 | INTERP_SLOT_DIR, line + namelen + 5); | |
49ba83fb JL |
567 | return run_service(interp_table, s); |
568 | } | |
d819e4e6 | 569 | } |
a87e8be2 | 570 | |
f8ff0c06 | 571 | logerror("Protocol error: '%s'", line); |
a87e8be2 LT |
572 | return -1; |
573 | } | |
574 | ||
66e631de LT |
575 | |
576 | /* | |
577 | * We count spawned/reaped separately, just to avoid any | |
578 | * races when updating them from signals. The SIGCHLD handler | |
579 | * will only update children_reaped, and the fork logic will | |
580 | * only update children_spawned. | |
581 | * | |
582 | * MAX_CHILDREN should be a power-of-two to make the modulus | |
583 | * operation cheap. It should also be at least twice | |
584 | * the maximum number of connections we will ever allow. | |
585 | */ | |
586 | #define MAX_CHILDREN 128 | |
587 | ||
588 | static int max_connections = 25; | |
589 | ||
590 | /* These are updated by the signal handler */ | |
96f1e58f | 591 | static volatile unsigned int children_reaped; |
4d8fa916 | 592 | static pid_t dead_child[MAX_CHILDREN]; |
66e631de LT |
593 | |
594 | /* These are updated by the main loop */ | |
96f1e58f DR |
595 | static unsigned int children_spawned; |
596 | static unsigned int children_deleted; | |
66e631de | 597 | |
4d8fa916 | 598 | static struct child { |
66e631de | 599 | pid_t pid; |
7fa09084 | 600 | int addrlen; |
df076bdb | 601 | struct sockaddr_storage address; |
66e631de LT |
602 | } live_child[MAX_CHILDREN]; |
603 | ||
7fa09084 | 604 | static void add_child(int idx, pid_t pid, struct sockaddr *addr, int addrlen) |
66e631de LT |
605 | { |
606 | live_child[idx].pid = pid; | |
607 | live_child[idx].addrlen = addrlen; | |
df076bdb | 608 | memcpy(&live_child[idx].address, addr, addrlen); |
66e631de LT |
609 | } |
610 | ||
611 | /* | |
612 | * Walk from "deleted" to "spawned", and remove child "pid". | |
613 | * | |
614 | * We move everything up by one, since the new "deleted" will | |
615 | * be one higher. | |
616 | */ | |
617 | static void remove_child(pid_t pid, unsigned deleted, unsigned spawned) | |
618 | { | |
619 | struct child n; | |
620 | ||
621 | deleted %= MAX_CHILDREN; | |
622 | spawned %= MAX_CHILDREN; | |
623 | if (live_child[deleted].pid == pid) { | |
624 | live_child[deleted].pid = -1; | |
625 | return; | |
626 | } | |
627 | n = live_child[deleted]; | |
628 | for (;;) { | |
629 | struct child m; | |
630 | deleted = (deleted + 1) % MAX_CHILDREN; | |
631 | if (deleted == spawned) | |
632 | die("could not find dead child %d\n", pid); | |
633 | m = live_child[deleted]; | |
634 | live_child[deleted] = n; | |
635 | if (m.pid == pid) | |
636 | return; | |
637 | n = m; | |
638 | } | |
639 | } | |
640 | ||
641 | /* | |
642 | * This gets called if the number of connections grows | |
643 | * past "max_connections". | |
644 | * | |
645 | * We _should_ start off by searching for connections | |
646 | * from the same IP, and if there is some address wth | |
647 | * multiple connections, we should kill that first. | |
648 | * | |
649 | * As it is, we just "randomly" kill 25% of the connections, | |
650 | * and our pseudo-random generator sucks too. I have no | |
651 | * shame. | |
652 | * | |
653 | * Really, this is just a place-holder for a _real_ algorithm. | |
654 | */ | |
02d57da4 | 655 | static void kill_some_children(int signo, unsigned start, unsigned stop) |
66e631de LT |
656 | { |
657 | start %= MAX_CHILDREN; | |
658 | stop %= MAX_CHILDREN; | |
659 | while (start != stop) { | |
660 | if (!(start & 3)) | |
02d57da4 | 661 | kill(live_child[start].pid, signo); |
66e631de LT |
662 | start = (start + 1) % MAX_CHILDREN; |
663 | } | |
664 | } | |
665 | ||
02d57da4 | 666 | static void check_max_connections(void) |
a87e8be2 | 667 | { |
02d57da4 | 668 | for (;;) { |
eaa94919 | 669 | int active; |
66e631de | 670 | unsigned spawned, reaped, deleted; |
eaa94919 | 671 | |
66e631de | 672 | spawned = children_spawned; |
66e631de LT |
673 | reaped = children_reaped; |
674 | deleted = children_deleted; | |
675 | ||
676 | while (deleted < reaped) { | |
677 | pid_t pid = dead_child[deleted % MAX_CHILDREN]; | |
678 | remove_child(pid, deleted, spawned); | |
679 | deleted++; | |
680 | } | |
681 | children_deleted = deleted; | |
682 | ||
683 | active = spawned - deleted; | |
02d57da4 LT |
684 | if (active <= max_connections) |
685 | break; | |
66e631de | 686 | |
02d57da4 LT |
687 | /* Kill some unstarted connections with SIGTERM */ |
688 | kill_some_children(SIGTERM, deleted, spawned); | |
689 | if (active <= max_connections << 1) | |
690 | break; | |
691 | ||
692 | /* If the SIGTERM thing isn't helping use SIGKILL */ | |
693 | kill_some_children(SIGKILL, deleted, spawned); | |
694 | sleep(1); | |
695 | } | |
696 | } | |
697 | ||
7fa09084 | 698 | static void handle(int incoming, struct sockaddr *addr, int addrlen) |
02d57da4 LT |
699 | { |
700 | pid_t pid = fork(); | |
701 | ||
702 | if (pid) { | |
703 | unsigned idx; | |
704 | ||
705 | close(incoming); | |
706 | if (pid < 0) | |
707 | return; | |
708 | ||
709 | idx = children_spawned % MAX_CHILDREN; | |
710 | children_spawned++; | |
711 | add_child(idx, pid, addr, addrlen); | |
66e631de | 712 | |
02d57da4 | 713 | check_max_connections(); |
a87e8be2 LT |
714 | return; |
715 | } | |
716 | ||
717 | dup2(incoming, 0); | |
718 | dup2(incoming, 1); | |
719 | close(incoming); | |
f8ff0c06 | 720 | |
5b276ee4 | 721 | exit(execute(addr)); |
a87e8be2 LT |
722 | } |
723 | ||
eaa94919 LT |
724 | static void child_handler(int signo) |
725 | { | |
726 | for (;;) { | |
9048fe1c PB |
727 | int status; |
728 | pid_t pid = waitpid(-1, &status, WNOHANG); | |
66e631de LT |
729 | |
730 | if (pid > 0) { | |
731 | unsigned reaped = children_reaped; | |
732 | dead_child[reaped % MAX_CHILDREN] = pid; | |
733 | children_reaped = reaped + 1; | |
f8ff0c06 | 734 | /* XXX: Custom logging, since we don't wanna getpid() */ |
9048fe1c | 735 | if (verbose) { |
554fe20d | 736 | const char *dead = ""; |
9048fe1c PB |
737 | if (!WIFEXITED(status) || WEXITSTATUS(status) > 0) |
738 | dead = " (with error)"; | |
739 | if (log_syslog) | |
740 | syslog(LOG_INFO, "[%d] Disconnected%s", pid, dead); | |
741 | else | |
742 | fprintf(stderr, "[%d] Disconnected%s\n", pid, dead); | |
743 | } | |
eaa94919 LT |
744 | continue; |
745 | } | |
746 | break; | |
747 | } | |
748 | } | |
749 | ||
1955fabf MW |
750 | static int set_reuse_addr(int sockfd) |
751 | { | |
752 | int on = 1; | |
753 | ||
754 | if (!reuseaddr) | |
755 | return 0; | |
756 | return setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, | |
757 | &on, sizeof(on)); | |
758 | } | |
759 | ||
6573faff PA |
760 | #ifndef NO_IPV6 |
761 | ||
dd467629 | 762 | static int socksetup(char *listen_addr, int listen_port, int **socklist_p) |
a87e8be2 | 763 | { |
df076bdb YH |
764 | int socknum = 0, *socklist = NULL; |
765 | int maxfd = -1; | |
df076bdb | 766 | char pbuf[NI_MAXSERV]; |
6573faff PA |
767 | struct addrinfo hints, *ai0, *ai; |
768 | int gai; | |
df076bdb | 769 | |
dd467629 | 770 | sprintf(pbuf, "%d", listen_port); |
df076bdb YH |
771 | memset(&hints, 0, sizeof(hints)); |
772 | hints.ai_family = AF_UNSPEC; | |
773 | hints.ai_socktype = SOCK_STREAM; | |
774 | hints.ai_protocol = IPPROTO_TCP; | |
775 | hints.ai_flags = AI_PASSIVE; | |
776 | ||
dd467629 | 777 | gai = getaddrinfo(listen_addr, pbuf, &hints, &ai0); |
df076bdb YH |
778 | if (gai) |
779 | die("getaddrinfo() failed: %s\n", gai_strerror(gai)); | |
780 | ||
df076bdb YH |
781 | for (ai = ai0; ai; ai = ai->ai_next) { |
782 | int sockfd; | |
df076bdb YH |
783 | |
784 | sockfd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol); | |
785 | if (sockfd < 0) | |
786 | continue; | |
787 | if (sockfd >= FD_SETSIZE) { | |
788 | error("too large socket descriptor."); | |
789 | close(sockfd); | |
790 | continue; | |
791 | } | |
792 | ||
793 | #ifdef IPV6_V6ONLY | |
794 | if (ai->ai_family == AF_INET6) { | |
795 | int on = 1; | |
796 | setsockopt(sockfd, IPPROTO_IPV6, IPV6_V6ONLY, | |
797 | &on, sizeof(on)); | |
798 | /* Note: error is not fatal */ | |
799 | } | |
800 | #endif | |
801 | ||
1955fabf MW |
802 | if (set_reuse_addr(sockfd)) { |
803 | close(sockfd); | |
0032d548 | 804 | continue; |
1955fabf MW |
805 | } |
806 | ||
df076bdb YH |
807 | if (bind(sockfd, ai->ai_addr, ai->ai_addrlen) < 0) { |
808 | close(sockfd); | |
809 | continue; /* not fatal */ | |
810 | } | |
811 | if (listen(sockfd, 5) < 0) { | |
812 | close(sockfd); | |
813 | continue; /* not fatal */ | |
814 | } | |
815 | ||
83572c1a | 816 | socklist = xrealloc(socklist, sizeof(int) * (socknum + 1)); |
df076bdb YH |
817 | socklist[socknum++] = sockfd; |
818 | ||
df076bdb YH |
819 | if (maxfd < sockfd) |
820 | maxfd = sockfd; | |
821 | } | |
822 | ||
823 | freeaddrinfo(ai0); | |
824 | ||
6573faff PA |
825 | *socklist_p = socklist; |
826 | return socknum; | |
827 | } | |
828 | ||
829 | #else /* NO_IPV6 */ | |
830 | ||
100690b6 | 831 | static int socksetup(char *listen_addr, int listen_port, int **socklist_p) |
6573faff PA |
832 | { |
833 | struct sockaddr_in sin; | |
834 | int sockfd; | |
835 | ||
dd467629 JL |
836 | memset(&sin, 0, sizeof sin); |
837 | sin.sin_family = AF_INET; | |
838 | sin.sin_port = htons(listen_port); | |
839 | ||
840 | if (listen_addr) { | |
841 | /* Well, host better be an IP address here. */ | |
842 | if (inet_pton(AF_INET, listen_addr, &sin.sin_addr.s_addr) <= 0) | |
843 | return 0; | |
844 | } else { | |
845 | sin.sin_addr.s_addr = htonl(INADDR_ANY); | |
846 | } | |
847 | ||
6573faff PA |
848 | sockfd = socket(AF_INET, SOCK_STREAM, 0); |
849 | if (sockfd < 0) | |
850 | return 0; | |
851 | ||
1955fabf MW |
852 | if (set_reuse_addr(sockfd)) { |
853 | close(sockfd); | |
854 | return 0; | |
855 | } | |
856 | ||
6573faff PA |
857 | if ( bind(sockfd, (struct sockaddr *)&sin, sizeof sin) < 0 ) { |
858 | close(sockfd); | |
859 | return 0; | |
860 | } | |
a87e8be2 | 861 | |
f35230fb PS |
862 | if (listen(sockfd, 5) < 0) { |
863 | close(sockfd); | |
864 | return 0; | |
865 | } | |
866 | ||
1b4713fb | 867 | *socklist_p = xmalloc(sizeof(int)); |
6573faff | 868 | **socklist_p = sockfd; |
f35230fb | 869 | return 1; |
6573faff PA |
870 | } |
871 | ||
872 | #endif | |
873 | ||
874 | static int service_loop(int socknum, int *socklist) | |
875 | { | |
876 | struct pollfd *pfd; | |
877 | int i; | |
878 | ||
1b4713fb | 879 | pfd = xcalloc(socknum, sizeof(struct pollfd)); |
6573faff PA |
880 | |
881 | for (i = 0; i < socknum; i++) { | |
882 | pfd[i].fd = socklist[i]; | |
883 | pfd[i].events = POLLIN; | |
884 | } | |
9220282a PA |
885 | |
886 | signal(SIGCHLD, child_handler); | |
a87e8be2 LT |
887 | |
888 | for (;;) { | |
df076bdb | 889 | int i; |
6573faff | 890 | |
7872e055 | 891 | if (poll(pfd, socknum, -1) < 0) { |
1eef0b33 | 892 | if (errno != EINTR) { |
6573faff | 893 | error("poll failed, resuming: %s", |
1eef0b33 JH |
894 | strerror(errno)); |
895 | sleep(1); | |
896 | } | |
df076bdb YH |
897 | continue; |
898 | } | |
899 | ||
900 | for (i = 0; i < socknum; i++) { | |
6573faff | 901 | if (pfd[i].revents & POLLIN) { |
df076bdb | 902 | struct sockaddr_storage ss; |
7626e49e | 903 | unsigned int sslen = sizeof(ss); |
6573faff | 904 | int incoming = accept(pfd[i].fd, (struct sockaddr *)&ss, &sslen); |
df076bdb YH |
905 | if (incoming < 0) { |
906 | switch (errno) { | |
907 | case EAGAIN: | |
908 | case EINTR: | |
909 | case ECONNABORTED: | |
910 | continue; | |
911 | default: | |
912 | die("accept returned %s", strerror(errno)); | |
913 | } | |
914 | } | |
915 | handle(incoming, (struct sockaddr *)&ss, sslen); | |
a87e8be2 LT |
916 | } |
917 | } | |
a87e8be2 LT |
918 | } |
919 | } | |
920 | ||
258e93a1 ML |
921 | /* if any standard file descriptor is missing open it to /dev/null */ |
922 | static void sanitize_stdfds(void) | |
923 | { | |
924 | int fd = open("/dev/null", O_RDWR, 0); | |
925 | while (fd != -1 && fd < 2) | |
926 | fd = dup(fd); | |
927 | if (fd == -1) | |
928 | die("open /dev/null or dup failed: %s", strerror(errno)); | |
929 | if (fd > 2) | |
930 | close(fd); | |
931 | } | |
932 | ||
a5262768 ML |
933 | static void daemonize(void) |
934 | { | |
935 | switch (fork()) { | |
936 | case 0: | |
937 | break; | |
938 | case -1: | |
939 | die("fork failed: %s", strerror(errno)); | |
940 | default: | |
941 | exit(0); | |
942 | } | |
943 | if (setsid() == -1) | |
944 | die("setsid failed: %s", strerror(errno)); | |
945 | close(0); | |
946 | close(1); | |
947 | close(2); | |
948 | sanitize_stdfds(); | |
949 | } | |
950 | ||
45ed5d7f ML |
951 | static void store_pid(const char *path) |
952 | { | |
953 | FILE *f = fopen(path, "w"); | |
954 | if (!f) | |
955 | die("cannot open pid file %s: %s", path, strerror(errno)); | |
956 | fprintf(f, "%d\n", getpid()); | |
957 | fclose(f); | |
958 | } | |
959 | ||
dd467629 | 960 | static int serve(char *listen_addr, int listen_port, struct passwd *pass, gid_t gid) |
6573faff PA |
961 | { |
962 | int socknum, *socklist; | |
4ae22d96 | 963 | |
dd467629 | 964 | socknum = socksetup(listen_addr, listen_port, &socklist); |
6573faff | 965 | if (socknum == 0) |
dd467629 JL |
966 | die("unable to allocate any listen sockets on host %s port %u", |
967 | listen_addr, listen_port); | |
4ae22d96 | 968 | |
678dac6b TS |
969 | if (pass && gid && |
970 | (initgroups(pass->pw_name, gid) || setgid (gid) || | |
971 | setuid(pass->pw_uid))) | |
972 | die("cannot drop privileges"); | |
973 | ||
6573faff | 974 | return service_loop(socknum, socklist); |
4ae22d96 | 975 | } |
6573faff | 976 | |
a87e8be2 LT |
977 | int main(int argc, char **argv) |
978 | { | |
dd467629 JL |
979 | int listen_port = 0; |
980 | char *listen_addr = NULL; | |
e64e1b79 | 981 | int inetd_mode = 0; |
678dac6b | 982 | const char *pid_file = NULL, *user_name = NULL, *group_name = NULL; |
a5262768 | 983 | int detach = 0; |
678dac6b TS |
984 | struct passwd *pass = NULL; |
985 | struct group *group; | |
986 | gid_t gid = 0; | |
a87e8be2 LT |
987 | int i; |
988 | ||
f0b7367c JH |
989 | /* Without this we cannot rely on waitpid() to tell |
990 | * what happened to our children. | |
991 | */ | |
992 | signal(SIGCHLD, SIG_DFL); | |
993 | ||
a87e8be2 LT |
994 | for (i = 1; i < argc; i++) { |
995 | char *arg = argv[i]; | |
996 | ||
dd467629 JL |
997 | if (!strncmp(arg, "--listen=", 9)) { |
998 | char *p = arg + 9; | |
999 | char *ph = listen_addr = xmalloc(strlen(arg + 9) + 1); | |
1000 | while (*p) | |
1001 | *ph++ = tolower(*p++); | |
1002 | *ph = 0; | |
1003 | continue; | |
1004 | } | |
a87e8be2 LT |
1005 | if (!strncmp(arg, "--port=", 7)) { |
1006 | char *end; | |
1007 | unsigned long n; | |
1008 | n = strtoul(arg+7, &end, 0); | |
1009 | if (arg[7] && !*end) { | |
dd467629 | 1010 | listen_port = n; |
a87e8be2 LT |
1011 | continue; |
1012 | } | |
1013 | } | |
e64e1b79 LT |
1014 | if (!strcmp(arg, "--inetd")) { |
1015 | inetd_mode = 1; | |
a8883288 | 1016 | log_syslog = 1; |
e64e1b79 LT |
1017 | continue; |
1018 | } | |
f8ff0c06 PB |
1019 | if (!strcmp(arg, "--verbose")) { |
1020 | verbose = 1; | |
1021 | continue; | |
1022 | } | |
9048fe1c PB |
1023 | if (!strcmp(arg, "--syslog")) { |
1024 | log_syslog = 1; | |
9048fe1c PB |
1025 | continue; |
1026 | } | |
4ae95682 PA |
1027 | if (!strcmp(arg, "--export-all")) { |
1028 | export_all_trees = 1; | |
1029 | continue; | |
1030 | } | |
960deccb PA |
1031 | if (!strncmp(arg, "--timeout=", 10)) { |
1032 | timeout = atoi(arg+10); | |
a8883288 | 1033 | continue; |
960deccb | 1034 | } |
54e31a20 | 1035 | if (!strncmp(arg, "--init-timeout=", 15)) { |
960deccb | 1036 | init_timeout = atoi(arg+15); |
a8883288 | 1037 | continue; |
960deccb | 1038 | } |
4dbd1352 AE |
1039 | if (!strcmp(arg, "--strict-paths")) { |
1040 | strict_paths = 1; | |
1041 | continue; | |
1042 | } | |
b21c31c9 PB |
1043 | if (!strncmp(arg, "--base-path=", 12)) { |
1044 | base_path = arg+12; | |
1045 | continue; | |
1046 | } | |
49ba83fb JL |
1047 | if (!strncmp(arg, "--interpolated-path=", 20)) { |
1048 | interpolated_path = arg+20; | |
1049 | continue; | |
1050 | } | |
1955fabf MW |
1051 | if (!strcmp(arg, "--reuseaddr")) { |
1052 | reuseaddr = 1; | |
1053 | continue; | |
1054 | } | |
603968d2 JH |
1055 | if (!strcmp(arg, "--user-path")) { |
1056 | user_path = ""; | |
1057 | continue; | |
1058 | } | |
1059 | if (!strncmp(arg, "--user-path=", 12)) { | |
1060 | user_path = arg + 12; | |
1061 | continue; | |
1062 | } | |
45ed5d7f ML |
1063 | if (!strncmp(arg, "--pid-file=", 11)) { |
1064 | pid_file = arg + 11; | |
1065 | continue; | |
1066 | } | |
a5262768 ML |
1067 | if (!strcmp(arg, "--detach")) { |
1068 | detach = 1; | |
1069 | log_syslog = 1; | |
1070 | continue; | |
1071 | } | |
678dac6b TS |
1072 | if (!strncmp(arg, "--user=", 7)) { |
1073 | user_name = arg + 7; | |
1074 | continue; | |
1075 | } | |
1076 | if (!strncmp(arg, "--group=", 8)) { | |
1077 | group_name = arg + 8; | |
1078 | continue; | |
1079 | } | |
d819e4e6 JH |
1080 | if (!strncmp(arg, "--enable=", 9)) { |
1081 | enable_service(arg + 9, 1); | |
1082 | continue; | |
1083 | } | |
1084 | if (!strncmp(arg, "--disable=", 10)) { | |
1085 | enable_service(arg + 10, 0); | |
1086 | continue; | |
1087 | } | |
74c0cc21 JH |
1088 | if (!strncmp(arg, "--allow-override=", 17)) { |
1089 | make_service_overridable(arg + 17, 1); | |
d819e4e6 JH |
1090 | continue; |
1091 | } | |
74c0cc21 JH |
1092 | if (!strncmp(arg, "--forbid-override=", 18)) { |
1093 | make_service_overridable(arg + 18, 0); | |
d819e4e6 JH |
1094 | continue; |
1095 | } | |
4ae95682 PA |
1096 | if (!strcmp(arg, "--")) { |
1097 | ok_paths = &argv[i+1]; | |
1098 | break; | |
1099 | } else if (arg[0] != '-') { | |
1100 | ok_paths = &argv[i]; | |
1101 | break; | |
1102 | } | |
e64e1b79 | 1103 | |
a87e8be2 LT |
1104 | usage(daemon_usage); |
1105 | } | |
1106 | ||
678dac6b TS |
1107 | if (inetd_mode && (group_name || user_name)) |
1108 | die("--user and --group are incompatible with --inetd"); | |
1109 | ||
dd467629 JL |
1110 | if (inetd_mode && (listen_port || listen_addr)) |
1111 | die("--listen= and --port= are incompatible with --inetd"); | |
1112 | else if (listen_port == 0) | |
1113 | listen_port = DEFAULT_GIT_PORT; | |
1114 | ||
678dac6b TS |
1115 | if (group_name && !user_name) |
1116 | die("--group supplied without --user"); | |
1117 | ||
1118 | if (user_name) { | |
1119 | pass = getpwnam(user_name); | |
1120 | if (!pass) | |
1121 | die("user not found - %s", user_name); | |
1122 | ||
1123 | if (!group_name) | |
1124 | gid = pass->pw_gid; | |
1125 | else { | |
1126 | group = getgrnam(group_name); | |
1127 | if (!group) | |
1128 | die("group not found - %s", group_name); | |
1129 | ||
1130 | gid = group->gr_gid; | |
1131 | } | |
1132 | } | |
1133 | ||
ad8b4f56 | 1134 | if (log_syslog) { |
a8883288 | 1135 | openlog("git-daemon", 0, LOG_DAEMON); |
ad8b4f56 | 1136 | set_die_routine(daemon_die); |
4dbd1352 AE |
1137 | } |
1138 | ||
ad8b4f56 ML |
1139 | if (strict_paths && (!ok_paths || !*ok_paths)) |
1140 | die("option --strict-paths requires a whitelist"); | |
1141 | ||
7c3693f1 | 1142 | if (inetd_mode) { |
5b276ee4 DW |
1143 | struct sockaddr_storage ss; |
1144 | struct sockaddr *peer = (struct sockaddr *)&ss; | |
1145 | socklen_t slen = sizeof(ss); | |
1146 | ||
ba0012c3 | 1147 | freopen("/dev/null", "w", stderr); |
5b276ee4 DW |
1148 | |
1149 | if (getpeername(0, peer, &slen)) | |
1150 | peer = NULL; | |
1151 | ||
1152 | return execute(peer); | |
7c3693f1 | 1153 | } |
bce8230d | 1154 | |
a5262768 ML |
1155 | if (detach) |
1156 | daemonize(); | |
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 | } |