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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 | ||
415e7b87 PW |
12 | #ifndef NI_MAXSERV |
13 | #define NI_MAXSERV 32 | |
14 | #endif | |
15 | ||
9048fe1c | 16 | static int log_syslog; |
f8ff0c06 | 17 | static int verbose; |
1955fabf | 18 | static int reuseaddr; |
f8ff0c06 | 19 | |
960deccb | 20 | static const char daemon_usage[] = |
dd467629 | 21 | "git-daemon [--verbose] [--syslog] [--export-all]\n" |
b21c31c9 | 22 | " [--timeout=n] [--init-timeout=n] [--strict-paths]\n" |
73a7a656 JA |
23 | " [--base-path=path] [--base-path-relaxed]\n" |
24 | " [--user-path | --user-path=path]\n" | |
49ba83fb | 25 | " [--interpolated-path=path]\n" |
678dac6b | 26 | " [--reuseaddr] [--detach] [--pid-file=file]\n" |
d9edcbd6 | 27 | " [--[enable|disable|allow-override|forbid-override]=service]\n" |
dd467629 JL |
28 | " [--inetd | [--listen=host_or_ipaddr] [--port=n]\n" |
29 | " [--user=user [--group=group]]\n" | |
30 | " [directory...]"; | |
4ae95682 PA |
31 | |
32 | /* List of acceptable pathname prefixes */ | |
96f1e58f DR |
33 | static char **ok_paths; |
34 | static int strict_paths; | |
4ae95682 PA |
35 | |
36 | /* If this is set, git-daemon-export-ok is not required */ | |
96f1e58f | 37 | static int export_all_trees; |
f8ff0c06 | 38 | |
b21c31c9 | 39 | /* Take all paths relative to this one if non-NULL */ |
96f1e58f | 40 | static char *base_path; |
49ba83fb | 41 | static char *interpolated_path; |
73a7a656 | 42 | static int base_path_relaxed; |
49ba83fb JL |
43 | |
44 | /* Flag indicating client sent extra args. */ | |
45 | static int saw_extended_args; | |
b21c31c9 | 46 | |
603968d2 JH |
47 | /* If defined, ~user notation is allowed and the string is inserted |
48 | * after ~user/. E.g. a request to git://host/~alice/frotz would | |
49 | * go to /home/alice/pub_git/frotz with --user-path=pub_git. | |
50 | */ | |
96f1e58f | 51 | static const char *user_path; |
603968d2 | 52 | |
960deccb | 53 | /* Timeout, and initial timeout */ |
96f1e58f DR |
54 | static unsigned int timeout; |
55 | static unsigned int init_timeout; | |
f8ff0c06 | 56 | |
49ba83fb JL |
57 | /* |
58 | * Static table for now. Ugh. | |
59 | * Feel free to make dynamic as needed. | |
60 | */ | |
61 | #define INTERP_SLOT_HOST (0) | |
dd467629 JL |
62 | #define INTERP_SLOT_CANON_HOST (1) |
63 | #define INTERP_SLOT_IP (2) | |
64 | #define INTERP_SLOT_PORT (3) | |
65 | #define INTERP_SLOT_DIR (4) | |
66 | #define INTERP_SLOT_PERCENT (5) | |
49ba83fb JL |
67 | |
68 | static struct interp interp_table[] = { | |
69 | { "%H", 0}, | |
dd467629 JL |
70 | { "%CH", 0}, |
71 | { "%IP", 0}, | |
72 | { "%P", 0}, | |
49ba83fb | 73 | { "%D", 0}, |
eb30aed7 | 74 | { "%%", 0}, |
49ba83fb JL |
75 | }; |
76 | ||
77 | ||
9048fe1c | 78 | static void logreport(int priority, const char *err, va_list params) |
f8ff0c06 PB |
79 | { |
80 | /* We should do a single write so that it is atomic and output | |
81 | * of several processes do not get intermingled. */ | |
82 | char buf[1024]; | |
83 | int buflen; | |
84 | int maxlen, msglen; | |
85 | ||
86 | /* sizeof(buf) should be big enough for "[pid] \n" */ | |
1bedd4ca | 87 | buflen = snprintf(buf, sizeof(buf), "[%ld] ", (long) getpid()); |
f8ff0c06 PB |
88 | |
89 | maxlen = sizeof(buf) - buflen - 1; /* -1 for our own LF */ | |
90 | msglen = vsnprintf(buf + buflen, maxlen, err, params); | |
91 | ||
9048fe1c PB |
92 | if (log_syslog) { |
93 | syslog(priority, "%s", buf); | |
94 | return; | |
95 | } | |
96 | ||
f8ff0c06 PB |
97 | /* maxlen counted our own LF but also counts space given to |
98 | * vsnprintf for the terminating NUL. We want to make sure that | |
99 | * we have space for our own LF and NUL after the "meat" of the | |
100 | * message, so truncate it at maxlen - 1. | |
101 | */ | |
102 | if (msglen > maxlen - 1) | |
103 | msglen = maxlen - 1; | |
104 | else if (msglen < 0) | |
105 | msglen = 0; /* Protect against weird return values. */ | |
106 | buflen += msglen; | |
107 | ||
108 | buf[buflen++] = '\n'; | |
109 | buf[buflen] = '\0'; | |
110 | ||
93822c22 | 111 | write_in_full(2, buf, buflen); |
f8ff0c06 PB |
112 | } |
113 | ||
cdda4745 | 114 | static void logerror(const char *err, ...) |
f8ff0c06 PB |
115 | { |
116 | va_list params; | |
117 | va_start(params, err); | |
9048fe1c | 118 | logreport(LOG_ERR, err, params); |
f8ff0c06 PB |
119 | va_end(params); |
120 | } | |
121 | ||
cdda4745 | 122 | static void loginfo(const char *err, ...) |
f8ff0c06 PB |
123 | { |
124 | va_list params; | |
125 | if (!verbose) | |
126 | return; | |
127 | va_start(params, err); | |
9048fe1c | 128 | logreport(LOG_INFO, err, params); |
f8ff0c06 PB |
129 | va_end(params); |
130 | } | |
a87e8be2 | 131 | |
ad8b4f56 ML |
132 | static void NORETURN daemon_die(const char *err, va_list params) |
133 | { | |
134 | logreport(LOG_ERR, err, params); | |
135 | exit(1); | |
136 | } | |
137 | ||
d79374c7 JH |
138 | static int avoid_alias(char *p) |
139 | { | |
140 | int sl, ndot; | |
141 | ||
a6080a0a | 142 | /* |
d79374c7 JH |
143 | * This resurrects the belts and suspenders paranoia check by HPA |
144 | * done in <435560F7.4080006@zytor.com> thread, now enter_repo() | |
145 | * does not do getcwd() based path canonicalizations. | |
146 | * | |
147 | * sl becomes true immediately after seeing '/' and continues to | |
148 | * be true as long as dots continue after that without intervening | |
149 | * non-dot character. | |
150 | */ | |
151 | if (!p || (*p != '/' && *p != '~')) | |
152 | return -1; | |
153 | sl = 1; ndot = 0; | |
154 | p++; | |
155 | ||
156 | while (1) { | |
157 | char ch = *p++; | |
158 | if (sl) { | |
159 | if (ch == '.') | |
160 | ndot++; | |
161 | else if (ch == '/') { | |
162 | if (ndot < 3) | |
163 | /* reject //, /./ and /../ */ | |
164 | return -1; | |
165 | ndot = 0; | |
166 | } | |
167 | else if (ch == 0) { | |
168 | if (0 < ndot && ndot < 3) | |
169 | /* reject /.$ and /..$ */ | |
170 | return -1; | |
171 | return 0; | |
172 | } | |
173 | else | |
174 | sl = ndot = 0; | |
175 | } | |
176 | else if (ch == 0) | |
177 | return 0; | |
178 | else if (ch == '/') { | |
179 | sl = 1; | |
180 | ndot = 0; | |
181 | } | |
182 | } | |
183 | } | |
184 | ||
49ba83fb | 185 | static char *path_ok(struct interp *itable) |
4ae95682 | 186 | { |
603968d2 | 187 | static char rpath[PATH_MAX]; |
49ba83fb | 188 | static char interp_path[PATH_MAX]; |
73a7a656 | 189 | int retried_path = 0; |
d79374c7 | 190 | char *path; |
49ba83fb JL |
191 | char *dir; |
192 | ||
193 | dir = itable[INTERP_SLOT_DIR].value; | |
d79374c7 JH |
194 | |
195 | if (avoid_alias(dir)) { | |
196 | logerror("'%s': aliased", dir); | |
197 | return NULL; | |
198 | } | |
199 | ||
603968d2 JH |
200 | if (*dir == '~') { |
201 | if (!user_path) { | |
202 | logerror("'%s': User-path not allowed", dir); | |
203 | return NULL; | |
204 | } | |
205 | if (*user_path) { | |
206 | /* Got either "~alice" or "~alice/foo"; | |
207 | * rewrite them to "~alice/%s" or | |
208 | * "~alice/%s/foo". | |
209 | */ | |
210 | int namlen, restlen = strlen(dir); | |
211 | char *slash = strchr(dir, '/'); | |
212 | if (!slash) | |
213 | slash = dir + restlen; | |
214 | namlen = slash - dir; | |
215 | restlen -= namlen; | |
216 | loginfo("userpath <%s>, request <%s>, namlen %d, restlen %d, slash <%s>", user_path, dir, namlen, restlen, slash); | |
217 | snprintf(rpath, PATH_MAX, "%.*s/%s%.*s", | |
218 | namlen, dir, user_path, restlen, slash); | |
219 | dir = rpath; | |
220 | } | |
221 | } | |
49ba83fb JL |
222 | else if (interpolated_path && saw_extended_args) { |
223 | if (*dir != '/') { | |
224 | /* Allow only absolute */ | |
225 | logerror("'%s': Non-absolute path denied (interpolated-path active)", dir); | |
226 | return NULL; | |
227 | } | |
228 | ||
229 | interpolate(interp_path, PATH_MAX, interpolated_path, | |
230 | interp_table, ARRAY_SIZE(interp_table)); | |
231 | loginfo("Interpolated dir '%s'", interp_path); | |
232 | ||
233 | dir = interp_path; | |
234 | } | |
603968d2 JH |
235 | else if (base_path) { |
236 | if (*dir != '/') { | |
237 | /* Allow only absolute */ | |
1fda3d55 | 238 | logerror("'%s': Non-absolute path denied (base-path active)", dir); |
b21c31c9 PB |
239 | return NULL; |
240 | } | |
49ba83fb JL |
241 | snprintf(rpath, PATH_MAX, "%s%s", base_path, dir); |
242 | dir = rpath; | |
b21c31c9 PB |
243 | } |
244 | ||
73a7a656 JA |
245 | do { |
246 | path = enter_repo(dir, strict_paths); | |
247 | if (path) | |
248 | break; | |
249 | ||
250 | /* | |
251 | * if we fail and base_path_relaxed is enabled, try without | |
252 | * prefixing the base path | |
253 | */ | |
254 | if (base_path && base_path_relaxed && !retried_path) { | |
255 | dir = itable[INTERP_SLOT_DIR].value; | |
256 | retried_path = 1; | |
257 | continue; | |
258 | } | |
259 | break; | |
260 | } while (1); | |
3e04c62d | 261 | |
4dbd1352 AE |
262 | if (!path) { |
263 | logerror("'%s': unable to chdir or not a git archive", dir); | |
264 | return NULL; | |
4ae95682 PA |
265 | } |
266 | ||
267 | if ( ok_paths && *ok_paths ) { | |
ce335fe0 | 268 | char **pp; |
4dbd1352 | 269 | int pathlen = strlen(path); |
4ae95682 | 270 | |
ce335fe0 | 271 | /* The validation is done on the paths after enter_repo |
a6080a0a | 272 | * appends optional {.git,.git/.git} and friends, but |
d79374c7 JH |
273 | * it does not use getcwd(). So if your /pub is |
274 | * a symlink to /mnt/pub, you can whitelist /pub and | |
275 | * do not have to say /mnt/pub. | |
276 | * Do not say /pub/. | |
ce335fe0 | 277 | */ |
4ae95682 PA |
278 | for ( pp = ok_paths ; *pp ; pp++ ) { |
279 | int len = strlen(*pp); | |
ce335fe0 JH |
280 | if (len <= pathlen && |
281 | !memcmp(*pp, path, len) && | |
282 | (path[len] == '\0' || | |
283 | (!strict_paths && path[len] == '/'))) | |
284 | return path; | |
4ae95682 | 285 | } |
4dbd1352 AE |
286 | } |
287 | else { | |
288 | /* be backwards compatible */ | |
289 | if (!strict_paths) | |
290 | return path; | |
4ae95682 PA |
291 | } |
292 | ||
4dbd1352 AE |
293 | logerror("'%s': not in whitelist", path); |
294 | return NULL; /* Fallthrough. Deny by default */ | |
4ae95682 | 295 | } |
a87e8be2 | 296 | |
d819e4e6 JH |
297 | typedef int (*daemon_service_fn)(void); |
298 | struct daemon_service { | |
299 | const char *name; | |
300 | const char *config_name; | |
301 | daemon_service_fn fn; | |
302 | int enabled; | |
303 | int overridable; | |
304 | }; | |
305 | ||
306 | static struct daemon_service *service_looking_at; | |
307 | static int service_enabled; | |
308 | ||
309 | static int git_daemon_config(const char *var, const char *value) | |
310 | { | |
cc44c765 | 311 | if (!prefixcmp(var, "daemon.") && |
d819e4e6 JH |
312 | !strcmp(var + 7, service_looking_at->config_name)) { |
313 | service_enabled = git_config_bool(var, value); | |
314 | return 0; | |
315 | } | |
316 | ||
317 | /* we are not interested in parsing any other configuration here */ | |
318 | return 0; | |
319 | } | |
320 | ||
49ba83fb | 321 | static int run_service(struct interp *itable, struct daemon_service *service) |
a87e8be2 | 322 | { |
4dbd1352 | 323 | const char *path; |
d819e4e6 JH |
324 | int enabled = service->enabled; |
325 | ||
49ba83fb JL |
326 | loginfo("Request %s for '%s'", |
327 | service->name, | |
328 | itable[INTERP_SLOT_DIR].value); | |
4dbd1352 | 329 | |
d819e4e6 JH |
330 | if (!enabled && !service->overridable) { |
331 | logerror("'%s': service not enabled.", service->name); | |
332 | errno = EACCES; | |
333 | return -1; | |
334 | } | |
4ae95682 | 335 | |
49ba83fb | 336 | if (!(path = path_ok(itable))) |
a87e8be2 | 337 | return -1; |
47888f0f | 338 | |
a87e8be2 LT |
339 | /* |
340 | * Security on the cheap. | |
341 | * | |
a935c397 | 342 | * We want a readable HEAD, usable "objects" directory, and |
a87e8be2 LT |
343 | * a "git-daemon-export-ok" flag that says that the other side |
344 | * is ok with us doing this. | |
4dbd1352 AE |
345 | * |
346 | * path_ok() uses enter_repo() and does whitelist checking. | |
347 | * We only need to make sure the repository is exported. | |
a87e8be2 | 348 | */ |
4dbd1352 | 349 | |
3e04c62d | 350 | if (!export_all_trees && access("git-daemon-export-ok", F_OK)) { |
4dbd1352 | 351 | logerror("'%s': repository not exported.", path); |
3e04c62d PA |
352 | errno = EACCES; |
353 | return -1; | |
354 | } | |
355 | ||
d819e4e6 JH |
356 | if (service->overridable) { |
357 | service_looking_at = service; | |
358 | service_enabled = -1; | |
359 | git_config(git_daemon_config); | |
360 | if (0 <= service_enabled) | |
361 | enabled = service_enabled; | |
362 | } | |
363 | if (!enabled) { | |
364 | logerror("'%s': service not enabled for '%s'", | |
365 | service->name, path); | |
366 | errno = EACCES; | |
367 | return -1; | |
368 | } | |
369 | ||
02d57da4 LT |
370 | /* |
371 | * We'll ignore SIGTERM from now on, we have a | |
372 | * good client. | |
373 | */ | |
374 | signal(SIGTERM, SIG_IGN); | |
375 | ||
d819e4e6 JH |
376 | return service->fn(); |
377 | } | |
378 | ||
379 | static int upload_pack(void) | |
380 | { | |
381 | /* Timeout as string */ | |
382 | char timeout_buf[64]; | |
383 | ||
960deccb PA |
384 | snprintf(timeout_buf, sizeof timeout_buf, "--timeout=%u", timeout); |
385 | ||
a87e8be2 | 386 | /* git-upload-pack only ever reads stuff, so this is safe */ |
77cb17e9 | 387 | execl_git_cmd("upload-pack", "--strict", timeout_buf, ".", NULL); |
a87e8be2 LT |
388 | return -1; |
389 | } | |
390 | ||
39345a21 FBH |
391 | static int upload_archive(void) |
392 | { | |
393 | execl_git_cmd("upload-archive", ".", NULL); | |
394 | return -1; | |
395 | } | |
396 | ||
4b3b1e1e LT |
397 | static int receive_pack(void) |
398 | { | |
399 | execl_git_cmd("receive-pack", ".", NULL); | |
400 | return -1; | |
401 | } | |
402 | ||
d819e4e6 | 403 | static struct daemon_service daemon_service[] = { |
39345a21 | 404 | { "upload-archive", "uploadarch", upload_archive, 0, 1 }, |
d819e4e6 | 405 | { "upload-pack", "uploadpack", upload_pack, 1, 1 }, |
4b3b1e1e | 406 | { "receive-pack", "receivepack", receive_pack, 0, 1 }, |
d819e4e6 JH |
407 | }; |
408 | ||
f3fa1838 JH |
409 | static void enable_service(const char *name, int ena) |
410 | { | |
d819e4e6 JH |
411 | int i; |
412 | for (i = 0; i < ARRAY_SIZE(daemon_service); i++) { | |
413 | if (!strcmp(daemon_service[i].name, name)) { | |
414 | daemon_service[i].enabled = ena; | |
415 | return; | |
416 | } | |
417 | } | |
418 | die("No such service %s", name); | |
419 | } | |
420 | ||
f3fa1838 JH |
421 | static void make_service_overridable(const char *name, int ena) |
422 | { | |
d819e4e6 JH |
423 | int i; |
424 | for (i = 0; i < ARRAY_SIZE(daemon_service); i++) { | |
425 | if (!strcmp(daemon_service[i].name, name)) { | |
426 | daemon_service[i].overridable = ena; | |
427 | return; | |
428 | } | |
429 | } | |
430 | die("No such service %s", name); | |
431 | } | |
432 | ||
eb30aed7 JL |
433 | /* |
434 | * Separate the "extra args" information as supplied by the client connection. | |
3dff5379 | 435 | * Any resulting data is squirreled away in the given interpolation table. |
eb30aed7 JL |
436 | */ |
437 | static void parse_extra_args(struct interp *table, char *extra_args, int buflen) | |
49ba83fb JL |
438 | { |
439 | char *val; | |
440 | int vallen; | |
441 | char *end = extra_args + buflen; | |
442 | ||
443 | while (extra_args < end && *extra_args) { | |
444 | saw_extended_args = 1; | |
445 | if (strncasecmp("host=", extra_args, 5) == 0) { | |
446 | val = extra_args + 5; | |
447 | vallen = strlen(val) + 1; | |
448 | if (*val) { | |
eb30aed7 JL |
449 | /* Split <host>:<port> at colon. */ |
450 | char *host = val; | |
451 | char *port = strrchr(host, ':'); | |
dd467629 JL |
452 | if (port) { |
453 | *port = 0; | |
454 | port++; | |
eb30aed7 | 455 | interp_set_entry(table, INTERP_SLOT_PORT, port); |
dd467629 | 456 | } |
eb30aed7 | 457 | interp_set_entry(table, INTERP_SLOT_HOST, host); |
49ba83fb | 458 | } |
eb30aed7 | 459 | |
49ba83fb JL |
460 | /* On to the next one */ |
461 | extra_args = val + vallen; | |
462 | } | |
463 | } | |
464 | } | |
465 | ||
52fae7de | 466 | static void fill_in_extra_table_entries(struct interp *itable) |
dd467629 JL |
467 | { |
468 | char *hp; | |
dd467629 JL |
469 | |
470 | /* | |
471 | * Replace literal host with lowercase-ized hostname. | |
472 | */ | |
473 | hp = interp_table[INTERP_SLOT_HOST].value; | |
83543a24 JH |
474 | if (!hp) |
475 | return; | |
dd467629 JL |
476 | for ( ; *hp; hp++) |
477 | *hp = tolower(*hp); | |
478 | ||
479 | /* | |
480 | * Locate canonical hostname and its IP address. | |
481 | */ | |
482 | #ifndef NO_IPV6 | |
483 | { | |
484 | struct addrinfo hints; | |
485 | struct addrinfo *ai, *ai0; | |
486 | int gai; | |
487 | static char addrbuf[HOST_NAME_MAX + 1]; | |
488 | ||
489 | memset(&hints, 0, sizeof(hints)); | |
490 | hints.ai_flags = AI_CANONNAME; | |
491 | ||
492 | gai = getaddrinfo(interp_table[INTERP_SLOT_HOST].value, 0, &hints, &ai0); | |
493 | if (!gai) { | |
494 | for (ai = ai0; ai; ai = ai->ai_next) { | |
495 | struct sockaddr_in *sin_addr = (void *)ai->ai_addr; | |
496 | ||
dd467629 JL |
497 | inet_ntop(AF_INET, &sin_addr->sin_addr, |
498 | addrbuf, sizeof(addrbuf)); | |
eb30aed7 JL |
499 | interp_set_entry(interp_table, |
500 | INTERP_SLOT_CANON_HOST, ai->ai_canonname); | |
501 | interp_set_entry(interp_table, | |
502 | INTERP_SLOT_IP, addrbuf); | |
dd467629 JL |
503 | break; |
504 | } | |
505 | freeaddrinfo(ai0); | |
506 | } | |
507 | } | |
508 | #else | |
509 | { | |
510 | struct hostent *hent; | |
511 | struct sockaddr_in sa; | |
512 | char **ap; | |
513 | static char addrbuf[HOST_NAME_MAX + 1]; | |
514 | ||
515 | hent = gethostbyname(interp_table[INTERP_SLOT_HOST].value); | |
dd467629 JL |
516 | |
517 | ap = hent->h_addr_list; | |
518 | memset(&sa, 0, sizeof sa); | |
519 | sa.sin_family = hent->h_addrtype; | |
520 | sa.sin_port = htons(0); | |
521 | memcpy(&sa.sin_addr, *ap, hent->h_length); | |
522 | ||
523 | inet_ntop(hent->h_addrtype, &sa.sin_addr, | |
524 | addrbuf, sizeof(addrbuf)); | |
eb30aed7 JL |
525 | |
526 | interp_set_entry(interp_table, INTERP_SLOT_CANON_HOST, hent->h_name); | |
527 | interp_set_entry(interp_table, INTERP_SLOT_IP, addrbuf); | |
dd467629 JL |
528 | } |
529 | #endif | |
dd467629 JL |
530 | } |
531 | ||
532 | ||
5b276ee4 | 533 | static int execute(struct sockaddr *addr) |
a87e8be2 | 534 | { |
7d80694a | 535 | static char line[1000]; |
d819e4e6 | 536 | int pktlen, len, i; |
7d80694a | 537 | |
5b276ee4 DW |
538 | if (addr) { |
539 | char addrbuf[256] = ""; | |
540 | int port = -1; | |
541 | ||
542 | if (addr->sa_family == AF_INET) { | |
543 | struct sockaddr_in *sin_addr = (void *) addr; | |
544 | inet_ntop(addr->sa_family, &sin_addr->sin_addr, addrbuf, sizeof(addrbuf)); | |
c67359be | 545 | port = ntohs(sin_addr->sin_port); |
5b276ee4 DW |
546 | #ifndef NO_IPV6 |
547 | } else if (addr && addr->sa_family == AF_INET6) { | |
548 | struct sockaddr_in6 *sin6_addr = (void *) addr; | |
549 | ||
550 | char *buf = addrbuf; | |
551 | *buf++ = '['; *buf = '\0'; /* stpcpy() is cool */ | |
552 | inet_ntop(AF_INET6, &sin6_addr->sin6_addr, buf, sizeof(addrbuf) - 1); | |
553 | strcat(buf, "]"); | |
554 | ||
c67359be | 555 | port = ntohs(sin6_addr->sin6_port); |
5b276ee4 DW |
556 | #endif |
557 | } | |
558 | loginfo("Connection from %s:%d", addrbuf, port); | |
559 | } | |
560 | ||
960deccb | 561 | alarm(init_timeout ? init_timeout : timeout); |
5ad312be | 562 | pktlen = packet_read_line(0, line, sizeof(line)); |
960deccb | 563 | alarm(0); |
7d80694a | 564 | |
5ad312be JL |
565 | len = strlen(line); |
566 | if (pktlen != len) | |
567 | loginfo("Extended attributes (%d bytes) exist <%.*s>", | |
568 | (int) pktlen - len, | |
569 | (int) pktlen - len, line + len + 1); | |
83543a24 | 570 | if (len && line[len-1] == '\n') { |
7d80694a | 571 | line[--len] = 0; |
83543a24 JH |
572 | pktlen--; |
573 | } | |
7d80694a | 574 | |
eb30aed7 JL |
575 | /* |
576 | * Initialize the path interpolation table for this connection. | |
577 | */ | |
578 | interp_clear_table(interp_table, ARRAY_SIZE(interp_table)); | |
579 | interp_set_entry(interp_table, INTERP_SLOT_PERCENT, "%"); | |
580 | ||
dd467629 | 581 | if (len != pktlen) { |
eb30aed7 | 582 | parse_extra_args(interp_table, line + len + 1, pktlen - len - 1); |
dd467629 JL |
583 | fill_in_extra_table_entries(interp_table); |
584 | } | |
49ba83fb | 585 | |
d819e4e6 JH |
586 | for (i = 0; i < ARRAY_SIZE(daemon_service); i++) { |
587 | struct daemon_service *s = &(daemon_service[i]); | |
588 | int namelen = strlen(s->name); | |
599065a3 | 589 | if (!prefixcmp(line, "git-") && |
d819e4e6 | 590 | !strncmp(s->name, line + 4, namelen) && |
49ba83fb | 591 | line[namelen + 4] == ' ') { |
eb30aed7 JL |
592 | /* |
593 | * Note: The directory here is probably context sensitive, | |
594 | * and might depend on the actual service being performed. | |
595 | */ | |
596 | interp_set_entry(interp_table, | |
597 | INTERP_SLOT_DIR, line + namelen + 5); | |
49ba83fb JL |
598 | return run_service(interp_table, s); |
599 | } | |
d819e4e6 | 600 | } |
a87e8be2 | 601 | |
f8ff0c06 | 602 | logerror("Protocol error: '%s'", line); |
a87e8be2 LT |
603 | return -1; |
604 | } | |
605 | ||
66e631de LT |
606 | |
607 | /* | |
608 | * We count spawned/reaped separately, just to avoid any | |
609 | * races when updating them from signals. The SIGCHLD handler | |
610 | * will only update children_reaped, and the fork logic will | |
611 | * only update children_spawned. | |
612 | * | |
613 | * MAX_CHILDREN should be a power-of-two to make the modulus | |
614 | * operation cheap. It should also be at least twice | |
615 | * the maximum number of connections we will ever allow. | |
616 | */ | |
617 | #define MAX_CHILDREN 128 | |
618 | ||
619 | static int max_connections = 25; | |
620 | ||
621 | /* These are updated by the signal handler */ | |
96f1e58f | 622 | static volatile unsigned int children_reaped; |
4d8fa916 | 623 | static pid_t dead_child[MAX_CHILDREN]; |
66e631de LT |
624 | |
625 | /* These are updated by the main loop */ | |
96f1e58f DR |
626 | static unsigned int children_spawned; |
627 | static unsigned int children_deleted; | |
66e631de | 628 | |
4d8fa916 | 629 | static struct child { |
66e631de | 630 | pid_t pid; |
7fa09084 | 631 | int addrlen; |
df076bdb | 632 | struct sockaddr_storage address; |
66e631de LT |
633 | } live_child[MAX_CHILDREN]; |
634 | ||
7fa09084 | 635 | static void add_child(int idx, pid_t pid, struct sockaddr *addr, int addrlen) |
66e631de LT |
636 | { |
637 | live_child[idx].pid = pid; | |
638 | live_child[idx].addrlen = addrlen; | |
df076bdb | 639 | memcpy(&live_child[idx].address, addr, addrlen); |
66e631de LT |
640 | } |
641 | ||
642 | /* | |
643 | * Walk from "deleted" to "spawned", and remove child "pid". | |
644 | * | |
645 | * We move everything up by one, since the new "deleted" will | |
646 | * be one higher. | |
647 | */ | |
648 | static void remove_child(pid_t pid, unsigned deleted, unsigned spawned) | |
649 | { | |
650 | struct child n; | |
651 | ||
652 | deleted %= MAX_CHILDREN; | |
653 | spawned %= MAX_CHILDREN; | |
654 | if (live_child[deleted].pid == pid) { | |
655 | live_child[deleted].pid = -1; | |
656 | return; | |
657 | } | |
658 | n = live_child[deleted]; | |
659 | for (;;) { | |
660 | struct child m; | |
661 | deleted = (deleted + 1) % MAX_CHILDREN; | |
662 | if (deleted == spawned) | |
663 | die("could not find dead child %d\n", pid); | |
664 | m = live_child[deleted]; | |
665 | live_child[deleted] = n; | |
666 | if (m.pid == pid) | |
667 | return; | |
668 | n = m; | |
669 | } | |
670 | } | |
671 | ||
672 | /* | |
673 | * This gets called if the number of connections grows | |
674 | * past "max_connections". | |
675 | * | |
676 | * We _should_ start off by searching for connections | |
677 | * from the same IP, and if there is some address wth | |
678 | * multiple connections, we should kill that first. | |
679 | * | |
680 | * As it is, we just "randomly" kill 25% of the connections, | |
681 | * and our pseudo-random generator sucks too. I have no | |
682 | * shame. | |
683 | * | |
684 | * Really, this is just a place-holder for a _real_ algorithm. | |
685 | */ | |
02d57da4 | 686 | static void kill_some_children(int signo, unsigned start, unsigned stop) |
66e631de LT |
687 | { |
688 | start %= MAX_CHILDREN; | |
689 | stop %= MAX_CHILDREN; | |
690 | while (start != stop) { | |
691 | if (!(start & 3)) | |
02d57da4 | 692 | kill(live_child[start].pid, signo); |
66e631de LT |
693 | start = (start + 1) % MAX_CHILDREN; |
694 | } | |
695 | } | |
696 | ||
02d57da4 | 697 | static void check_max_connections(void) |
a87e8be2 | 698 | { |
02d57da4 | 699 | for (;;) { |
eaa94919 | 700 | int active; |
66e631de | 701 | unsigned spawned, reaped, deleted; |
eaa94919 | 702 | |
66e631de | 703 | spawned = children_spawned; |
66e631de LT |
704 | reaped = children_reaped; |
705 | deleted = children_deleted; | |
706 | ||
707 | while (deleted < reaped) { | |
708 | pid_t pid = dead_child[deleted % MAX_CHILDREN]; | |
709 | remove_child(pid, deleted, spawned); | |
710 | deleted++; | |
711 | } | |
712 | children_deleted = deleted; | |
713 | ||
714 | active = spawned - deleted; | |
02d57da4 LT |
715 | if (active <= max_connections) |
716 | break; | |
66e631de | 717 | |
02d57da4 LT |
718 | /* Kill some unstarted connections with SIGTERM */ |
719 | kill_some_children(SIGTERM, deleted, spawned); | |
720 | if (active <= max_connections << 1) | |
721 | break; | |
722 | ||
723 | /* If the SIGTERM thing isn't helping use SIGKILL */ | |
724 | kill_some_children(SIGKILL, deleted, spawned); | |
725 | sleep(1); | |
726 | } | |
727 | } | |
728 | ||
7fa09084 | 729 | static void handle(int incoming, struct sockaddr *addr, int addrlen) |
02d57da4 LT |
730 | { |
731 | pid_t pid = fork(); | |
732 | ||
733 | if (pid) { | |
734 | unsigned idx; | |
735 | ||
736 | close(incoming); | |
737 | if (pid < 0) | |
738 | return; | |
739 | ||
740 | idx = children_spawned % MAX_CHILDREN; | |
741 | children_spawned++; | |
742 | add_child(idx, pid, addr, addrlen); | |
66e631de | 743 | |
02d57da4 | 744 | check_max_connections(); |
a87e8be2 LT |
745 | return; |
746 | } | |
747 | ||
748 | dup2(incoming, 0); | |
749 | dup2(incoming, 1); | |
750 | close(incoming); | |
f8ff0c06 | 751 | |
5b276ee4 | 752 | exit(execute(addr)); |
a87e8be2 LT |
753 | } |
754 | ||
eaa94919 LT |
755 | static void child_handler(int signo) |
756 | { | |
757 | for (;;) { | |
9048fe1c PB |
758 | int status; |
759 | pid_t pid = waitpid(-1, &status, WNOHANG); | |
66e631de LT |
760 | |
761 | if (pid > 0) { | |
762 | unsigned reaped = children_reaped; | |
763 | dead_child[reaped % MAX_CHILDREN] = pid; | |
764 | children_reaped = reaped + 1; | |
f8ff0c06 | 765 | /* XXX: Custom logging, since we don't wanna getpid() */ |
9048fe1c | 766 | if (verbose) { |
554fe20d | 767 | const char *dead = ""; |
9048fe1c PB |
768 | if (!WIFEXITED(status) || WEXITSTATUS(status) > 0) |
769 | dead = " (with error)"; | |
770 | if (log_syslog) | |
771 | syslog(LOG_INFO, "[%d] Disconnected%s", pid, dead); | |
772 | else | |
773 | fprintf(stderr, "[%d] Disconnected%s\n", pid, dead); | |
774 | } | |
eaa94919 LT |
775 | continue; |
776 | } | |
777 | break; | |
778 | } | |
779 | } | |
780 | ||
1955fabf MW |
781 | static int set_reuse_addr(int sockfd) |
782 | { | |
783 | int on = 1; | |
784 | ||
785 | if (!reuseaddr) | |
786 | return 0; | |
787 | return setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, | |
788 | &on, sizeof(on)); | |
789 | } | |
790 | ||
6573faff PA |
791 | #ifndef NO_IPV6 |
792 | ||
dd467629 | 793 | static int socksetup(char *listen_addr, int listen_port, int **socklist_p) |
a87e8be2 | 794 | { |
df076bdb YH |
795 | int socknum = 0, *socklist = NULL; |
796 | int maxfd = -1; | |
df076bdb | 797 | char pbuf[NI_MAXSERV]; |
6573faff PA |
798 | struct addrinfo hints, *ai0, *ai; |
799 | int gai; | |
20276889 | 800 | long flags; |
df076bdb | 801 | |
dd467629 | 802 | sprintf(pbuf, "%d", listen_port); |
df076bdb YH |
803 | memset(&hints, 0, sizeof(hints)); |
804 | hints.ai_family = AF_UNSPEC; | |
805 | hints.ai_socktype = SOCK_STREAM; | |
806 | hints.ai_protocol = IPPROTO_TCP; | |
807 | hints.ai_flags = AI_PASSIVE; | |
808 | ||
dd467629 | 809 | gai = getaddrinfo(listen_addr, pbuf, &hints, &ai0); |
df076bdb YH |
810 | if (gai) |
811 | die("getaddrinfo() failed: %s\n", gai_strerror(gai)); | |
812 | ||
df076bdb YH |
813 | for (ai = ai0; ai; ai = ai->ai_next) { |
814 | int sockfd; | |
df076bdb YH |
815 | |
816 | sockfd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol); | |
817 | if (sockfd < 0) | |
818 | continue; | |
819 | if (sockfd >= FD_SETSIZE) { | |
820 | error("too large socket descriptor."); | |
821 | close(sockfd); | |
822 | continue; | |
823 | } | |
824 | ||
825 | #ifdef IPV6_V6ONLY | |
826 | if (ai->ai_family == AF_INET6) { | |
827 | int on = 1; | |
828 | setsockopt(sockfd, IPPROTO_IPV6, IPV6_V6ONLY, | |
829 | &on, sizeof(on)); | |
830 | /* Note: error is not fatal */ | |
831 | } | |
832 | #endif | |
833 | ||
1955fabf MW |
834 | if (set_reuse_addr(sockfd)) { |
835 | close(sockfd); | |
0032d548 | 836 | continue; |
1955fabf MW |
837 | } |
838 | ||
df076bdb YH |
839 | if (bind(sockfd, ai->ai_addr, ai->ai_addrlen) < 0) { |
840 | close(sockfd); | |
841 | continue; /* not fatal */ | |
842 | } | |
843 | if (listen(sockfd, 5) < 0) { | |
844 | close(sockfd); | |
845 | continue; /* not fatal */ | |
846 | } | |
847 | ||
20276889 AJ |
848 | flags = fcntl(sockfd, F_GETFD, 0); |
849 | if (flags >= 0) | |
850 | fcntl(sockfd, F_SETFD, flags | FD_CLOEXEC); | |
851 | ||
83572c1a | 852 | socklist = xrealloc(socklist, sizeof(int) * (socknum + 1)); |
df076bdb YH |
853 | socklist[socknum++] = sockfd; |
854 | ||
df076bdb YH |
855 | if (maxfd < sockfd) |
856 | maxfd = sockfd; | |
857 | } | |
858 | ||
859 | freeaddrinfo(ai0); | |
860 | ||
6573faff PA |
861 | *socklist_p = socklist; |
862 | return socknum; | |
863 | } | |
864 | ||
865 | #else /* NO_IPV6 */ | |
866 | ||
100690b6 | 867 | static int socksetup(char *listen_addr, int listen_port, int **socklist_p) |
6573faff PA |
868 | { |
869 | struct sockaddr_in sin; | |
870 | int sockfd; | |
20276889 | 871 | long flags; |
6573faff | 872 | |
dd467629 JL |
873 | memset(&sin, 0, sizeof sin); |
874 | sin.sin_family = AF_INET; | |
875 | sin.sin_port = htons(listen_port); | |
876 | ||
877 | if (listen_addr) { | |
878 | /* Well, host better be an IP address here. */ | |
879 | if (inet_pton(AF_INET, listen_addr, &sin.sin_addr.s_addr) <= 0) | |
880 | return 0; | |
881 | } else { | |
882 | sin.sin_addr.s_addr = htonl(INADDR_ANY); | |
883 | } | |
884 | ||
6573faff PA |
885 | sockfd = socket(AF_INET, SOCK_STREAM, 0); |
886 | if (sockfd < 0) | |
887 | return 0; | |
888 | ||
1955fabf MW |
889 | if (set_reuse_addr(sockfd)) { |
890 | close(sockfd); | |
891 | return 0; | |
892 | } | |
893 | ||
6573faff PA |
894 | if ( bind(sockfd, (struct sockaddr *)&sin, sizeof sin) < 0 ) { |
895 | close(sockfd); | |
896 | return 0; | |
897 | } | |
a87e8be2 | 898 | |
f35230fb PS |
899 | if (listen(sockfd, 5) < 0) { |
900 | close(sockfd); | |
901 | return 0; | |
902 | } | |
903 | ||
20276889 AJ |
904 | flags = fcntl(sockfd, F_GETFD, 0); |
905 | if (flags >= 0) | |
906 | fcntl(sockfd, F_SETFD, flags | FD_CLOEXEC); | |
907 | ||
1b4713fb | 908 | *socklist_p = xmalloc(sizeof(int)); |
6573faff | 909 | **socklist_p = sockfd; |
f35230fb | 910 | return 1; |
6573faff PA |
911 | } |
912 | ||
913 | #endif | |
914 | ||
915 | static int service_loop(int socknum, int *socklist) | |
916 | { | |
917 | struct pollfd *pfd; | |
918 | int i; | |
919 | ||
1b4713fb | 920 | pfd = xcalloc(socknum, sizeof(struct pollfd)); |
6573faff PA |
921 | |
922 | for (i = 0; i < socknum; i++) { | |
923 | pfd[i].fd = socklist[i]; | |
924 | pfd[i].events = POLLIN; | |
925 | } | |
9220282a PA |
926 | |
927 | signal(SIGCHLD, child_handler); | |
a87e8be2 LT |
928 | |
929 | for (;;) { | |
df076bdb | 930 | int i; |
6573faff | 931 | |
7872e055 | 932 | if (poll(pfd, socknum, -1) < 0) { |
1eef0b33 | 933 | if (errno != EINTR) { |
6573faff | 934 | error("poll failed, resuming: %s", |
1eef0b33 JH |
935 | strerror(errno)); |
936 | sleep(1); | |
937 | } | |
df076bdb YH |
938 | continue; |
939 | } | |
940 | ||
941 | for (i = 0; i < socknum; i++) { | |
6573faff | 942 | if (pfd[i].revents & POLLIN) { |
df076bdb | 943 | struct sockaddr_storage ss; |
7626e49e | 944 | unsigned int sslen = sizeof(ss); |
6573faff | 945 | int incoming = accept(pfd[i].fd, (struct sockaddr *)&ss, &sslen); |
df076bdb YH |
946 | if (incoming < 0) { |
947 | switch (errno) { | |
948 | case EAGAIN: | |
949 | case EINTR: | |
950 | case ECONNABORTED: | |
951 | continue; | |
952 | default: | |
953 | die("accept returned %s", strerror(errno)); | |
954 | } | |
955 | } | |
956 | handle(incoming, (struct sockaddr *)&ss, sslen); | |
a87e8be2 LT |
957 | } |
958 | } | |
a87e8be2 LT |
959 | } |
960 | } | |
961 | ||
258e93a1 ML |
962 | /* if any standard file descriptor is missing open it to /dev/null */ |
963 | static void sanitize_stdfds(void) | |
964 | { | |
965 | int fd = open("/dev/null", O_RDWR, 0); | |
966 | while (fd != -1 && fd < 2) | |
967 | fd = dup(fd); | |
968 | if (fd == -1) | |
969 | die("open /dev/null or dup failed: %s", strerror(errno)); | |
970 | if (fd > 2) | |
971 | close(fd); | |
972 | } | |
973 | ||
a5262768 ML |
974 | static void daemonize(void) |
975 | { | |
976 | switch (fork()) { | |
977 | case 0: | |
978 | break; | |
979 | case -1: | |
980 | die("fork failed: %s", strerror(errno)); | |
981 | default: | |
982 | exit(0); | |
983 | } | |
984 | if (setsid() == -1) | |
985 | die("setsid failed: %s", strerror(errno)); | |
986 | close(0); | |
987 | close(1); | |
988 | close(2); | |
989 | sanitize_stdfds(); | |
990 | } | |
991 | ||
45ed5d7f ML |
992 | static void store_pid(const char *path) |
993 | { | |
994 | FILE *f = fopen(path, "w"); | |
995 | if (!f) | |
996 | die("cannot open pid file %s: %s", path, strerror(errno)); | |
bc4e7d03 JM |
997 | if (fprintf(f, "%d\n", getpid()) < 0 || fclose(f) != 0) |
998 | die("failed to write pid file %s: %s", path, strerror(errno)); | |
45ed5d7f ML |
999 | } |
1000 | ||
dd467629 | 1001 | static int serve(char *listen_addr, int listen_port, struct passwd *pass, gid_t gid) |
6573faff PA |
1002 | { |
1003 | int socknum, *socklist; | |
4ae22d96 | 1004 | |
dd467629 | 1005 | socknum = socksetup(listen_addr, listen_port, &socklist); |
6573faff | 1006 | if (socknum == 0) |
dd467629 JL |
1007 | die("unable to allocate any listen sockets on host %s port %u", |
1008 | listen_addr, listen_port); | |
4ae22d96 | 1009 | |
678dac6b TS |
1010 | if (pass && gid && |
1011 | (initgroups(pass->pw_name, gid) || setgid (gid) || | |
1012 | setuid(pass->pw_uid))) | |
1013 | die("cannot drop privileges"); | |
1014 | ||
6573faff | 1015 | return service_loop(socknum, socklist); |
4ae22d96 | 1016 | } |
6573faff | 1017 | |
a87e8be2 LT |
1018 | int main(int argc, char **argv) |
1019 | { | |
dd467629 JL |
1020 | int listen_port = 0; |
1021 | char *listen_addr = NULL; | |
e64e1b79 | 1022 | int inetd_mode = 0; |
678dac6b | 1023 | const char *pid_file = NULL, *user_name = NULL, *group_name = NULL; |
a5262768 | 1024 | int detach = 0; |
678dac6b TS |
1025 | struct passwd *pass = NULL; |
1026 | struct group *group; | |
1027 | gid_t gid = 0; | |
a87e8be2 LT |
1028 | int i; |
1029 | ||
f0b7367c JH |
1030 | /* Without this we cannot rely on waitpid() to tell |
1031 | * what happened to our children. | |
1032 | */ | |
1033 | signal(SIGCHLD, SIG_DFL); | |
1034 | ||
a87e8be2 LT |
1035 | for (i = 1; i < argc; i++) { |
1036 | char *arg = argv[i]; | |
1037 | ||
cc44c765 | 1038 | if (!prefixcmp(arg, "--listen=")) { |
dd467629 JL |
1039 | char *p = arg + 9; |
1040 | char *ph = listen_addr = xmalloc(strlen(arg + 9) + 1); | |
1041 | while (*p) | |
1042 | *ph++ = tolower(*p++); | |
1043 | *ph = 0; | |
1044 | continue; | |
1045 | } | |
cc44c765 | 1046 | if (!prefixcmp(arg, "--port=")) { |
a87e8be2 LT |
1047 | char *end; |
1048 | unsigned long n; | |
1049 | n = strtoul(arg+7, &end, 0); | |
1050 | if (arg[7] && !*end) { | |
dd467629 | 1051 | listen_port = n; |
a87e8be2 LT |
1052 | continue; |
1053 | } | |
1054 | } | |
e64e1b79 LT |
1055 | if (!strcmp(arg, "--inetd")) { |
1056 | inetd_mode = 1; | |
a8883288 | 1057 | log_syslog = 1; |
e64e1b79 LT |
1058 | continue; |
1059 | } | |
f8ff0c06 PB |
1060 | if (!strcmp(arg, "--verbose")) { |
1061 | verbose = 1; | |
1062 | continue; | |
1063 | } | |
9048fe1c PB |
1064 | if (!strcmp(arg, "--syslog")) { |
1065 | log_syslog = 1; | |
9048fe1c PB |
1066 | continue; |
1067 | } | |
4ae95682 PA |
1068 | if (!strcmp(arg, "--export-all")) { |
1069 | export_all_trees = 1; | |
1070 | continue; | |
1071 | } | |
cc44c765 | 1072 | if (!prefixcmp(arg, "--timeout=")) { |
960deccb | 1073 | timeout = atoi(arg+10); |
a8883288 | 1074 | continue; |
960deccb | 1075 | } |
cc44c765 | 1076 | if (!prefixcmp(arg, "--init-timeout=")) { |
960deccb | 1077 | init_timeout = atoi(arg+15); |
a8883288 | 1078 | continue; |
960deccb | 1079 | } |
4dbd1352 AE |
1080 | if (!strcmp(arg, "--strict-paths")) { |
1081 | strict_paths = 1; | |
1082 | continue; | |
1083 | } | |
cc44c765 | 1084 | if (!prefixcmp(arg, "--base-path=")) { |
b21c31c9 PB |
1085 | base_path = arg+12; |
1086 | continue; | |
1087 | } | |
73a7a656 JA |
1088 | if (!strcmp(arg, "--base-path-relaxed")) { |
1089 | base_path_relaxed = 1; | |
1090 | continue; | |
1091 | } | |
cc44c765 | 1092 | if (!prefixcmp(arg, "--interpolated-path=")) { |
49ba83fb JL |
1093 | interpolated_path = arg+20; |
1094 | continue; | |
1095 | } | |
1955fabf MW |
1096 | if (!strcmp(arg, "--reuseaddr")) { |
1097 | reuseaddr = 1; | |
1098 | continue; | |
1099 | } | |
603968d2 JH |
1100 | if (!strcmp(arg, "--user-path")) { |
1101 | user_path = ""; | |
1102 | continue; | |
1103 | } | |
cc44c765 | 1104 | if (!prefixcmp(arg, "--user-path=")) { |
603968d2 JH |
1105 | user_path = arg + 12; |
1106 | continue; | |
1107 | } | |
cc44c765 | 1108 | if (!prefixcmp(arg, "--pid-file=")) { |
45ed5d7f ML |
1109 | pid_file = arg + 11; |
1110 | continue; | |
1111 | } | |
a5262768 ML |
1112 | if (!strcmp(arg, "--detach")) { |
1113 | detach = 1; | |
1114 | log_syslog = 1; | |
1115 | continue; | |
1116 | } | |
cc44c765 | 1117 | if (!prefixcmp(arg, "--user=")) { |
678dac6b TS |
1118 | user_name = arg + 7; |
1119 | continue; | |
1120 | } | |
cc44c765 | 1121 | if (!prefixcmp(arg, "--group=")) { |
678dac6b TS |
1122 | group_name = arg + 8; |
1123 | continue; | |
1124 | } | |
cc44c765 | 1125 | if (!prefixcmp(arg, "--enable=")) { |
d819e4e6 JH |
1126 | enable_service(arg + 9, 1); |
1127 | continue; | |
1128 | } | |
cc44c765 | 1129 | if (!prefixcmp(arg, "--disable=")) { |
d819e4e6 JH |
1130 | enable_service(arg + 10, 0); |
1131 | continue; | |
1132 | } | |
cc44c765 | 1133 | if (!prefixcmp(arg, "--allow-override=")) { |
74c0cc21 | 1134 | make_service_overridable(arg + 17, 1); |
d819e4e6 JH |
1135 | continue; |
1136 | } | |
cc44c765 | 1137 | if (!prefixcmp(arg, "--forbid-override=")) { |
74c0cc21 | 1138 | make_service_overridable(arg + 18, 0); |
d819e4e6 JH |
1139 | continue; |
1140 | } | |
4ae95682 PA |
1141 | if (!strcmp(arg, "--")) { |
1142 | ok_paths = &argv[i+1]; | |
1143 | break; | |
1144 | } else if (arg[0] != '-') { | |
1145 | ok_paths = &argv[i]; | |
1146 | break; | |
1147 | } | |
e64e1b79 | 1148 | |
a87e8be2 LT |
1149 | usage(daemon_usage); |
1150 | } | |
1151 | ||
22665bba JS |
1152 | if (log_syslog) { |
1153 | openlog("git-daemon", 0, LOG_DAEMON); | |
1154 | set_die_routine(daemon_die); | |
1155 | } | |
1156 | ||
678dac6b TS |
1157 | if (inetd_mode && (group_name || user_name)) |
1158 | die("--user and --group are incompatible with --inetd"); | |
1159 | ||
dd467629 JL |
1160 | if (inetd_mode && (listen_port || listen_addr)) |
1161 | die("--listen= and --port= are incompatible with --inetd"); | |
1162 | else if (listen_port == 0) | |
1163 | listen_port = DEFAULT_GIT_PORT; | |
1164 | ||
678dac6b TS |
1165 | if (group_name && !user_name) |
1166 | die("--group supplied without --user"); | |
1167 | ||
1168 | if (user_name) { | |
1169 | pass = getpwnam(user_name); | |
1170 | if (!pass) | |
1171 | die("user not found - %s", user_name); | |
1172 | ||
1173 | if (!group_name) | |
1174 | gid = pass->pw_gid; | |
1175 | else { | |
1176 | group = getgrnam(group_name); | |
1177 | if (!group) | |
1178 | die("group not found - %s", group_name); | |
1179 | ||
1180 | gid = group->gr_gid; | |
1181 | } | |
1182 | } | |
1183 | ||
ad8b4f56 ML |
1184 | if (strict_paths && (!ok_paths || !*ok_paths)) |
1185 | die("option --strict-paths requires a whitelist"); | |
1186 | ||
20632071 JS |
1187 | if (base_path) { |
1188 | struct stat st; | |
1189 | ||
1190 | if (stat(base_path, &st) || !S_ISDIR(st.st_mode)) | |
1191 | die("base-path '%s' does not exist or " | |
1192 | "is not a directory", base_path); | |
1193 | } | |
1194 | ||
7c3693f1 | 1195 | if (inetd_mode) { |
5b276ee4 DW |
1196 | struct sockaddr_storage ss; |
1197 | struct sockaddr *peer = (struct sockaddr *)&ss; | |
1198 | socklen_t slen = sizeof(ss); | |
1199 | ||
ba0012c3 | 1200 | freopen("/dev/null", "w", stderr); |
5b276ee4 DW |
1201 | |
1202 | if (getpeername(0, peer, &slen)) | |
1203 | peer = NULL; | |
1204 | ||
1205 | return execute(peer); | |
7c3693f1 | 1206 | } |
bce8230d | 1207 | |
a5262768 ML |
1208 | if (detach) |
1209 | daemonize(); | |
1210 | else | |
1211 | sanitize_stdfds(); | |
258e93a1 | 1212 | |
45ed5d7f ML |
1213 | if (pid_file) |
1214 | store_pid(pid_file); | |
1215 | ||
dd467629 | 1216 | return serve(listen_addr, listen_port, pass, gid); |
a87e8be2 | 1217 | } |