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chromium / external / github.com / git / git / refs/tags/v1.6.4-rc1 / . / daemon.c
blob: 1b5ada6648da66d14dec6c399898916920582852 [file] [log] [blame]
Randal L. Schwartz979e32f2005-10-25 23:29:09[diff] [blame]1#include "cache.h"
Junio C Hamano85023572006-12-19 22:34:12[diff] [blame]2#include "pkt-line.h"
Michal Ostrowski77cb17e2006-01-11 02:12:17[diff] [blame]3#include "exec_cmd.h"
Johannes Sixt5d87dd42009-06-14 20:38:51[diff] [blame]4#include "run-command.h"
5#include "strbuf.h"
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]6
Junio C Hamano85023572006-12-19 22:34:12[diff] [blame]7#include <syslog.h>
8
Johannes Schindelin695dffe2006-09-28 10:00:35[diff] [blame]9#ifndef HOST_NAME_MAX
10#define HOST_NAME_MAX 256
11#endif
12
Patrick Welche415e7b82007-10-18 17:17:39[diff] [blame]13#ifndef NI_MAXSERV
14#define NI_MAXSERV 32
15#endif
16
Petr Baudis9048fe12005-09-24 14:13:01[diff] [blame]17static int log_syslog;
Petr Baudisf8ff0c02005-09-22 09:25:28[diff] [blame]18static int verbose;
Mark Wooding1955fab2006-02-03 20:27:04[diff] [blame]19static int reuseaddr;
Petr Baudisf8ff0c02005-09-22 09:25:28[diff] [blame]20
H. Peter Anvin960decc2005-10-19 21:27:01[diff] [blame]21static const char daemon_usage[] =
Stephan Beyer1b1dd232008-07-13 13:36:15[diff] [blame]22"git daemon [--verbose] [--syslog] [--export-all]\n"
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]23" [--timeout=n] [--init-timeout=n] [--max-connections=n]\n"
24" [--strict-paths] [--base-path=path] [--base-path-relaxed]\n"
Jens Axboe73a7a652007-07-27 21:00:29[diff] [blame]25" [--user-path | --user-path=path]\n"
Jon Loeliger49ba83f2006-09-20 01:31:51[diff] [blame]26" [--interpolated-path=path]\n"
Tilman Sauerbeck678dac62006-08-22 17:37:41[diff] [blame]27" [--reuseaddr] [--detach] [--pid-file=file]\n"
Junio C Hamanod9edcbd2006-09-07 08:40:04[diff] [blame]28" [--[enable|disable|allow-override|forbid-override]=service]\n"
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]29" [--inetd | [--listen=host_or_ipaddr] [--port=n]\n"
30" [--user=user [--group=group]]\n"
31" [directory...]";
H. Peter Anvin4ae95682005-09-27 02:10:55[diff] [blame]32
33/* List of acceptable pathname prefixes */
David Rientjes96f1e582006-08-15 17:23:48[diff] [blame]34static char **ok_paths;
35static int strict_paths;
H. Peter Anvin4ae95682005-09-27 02:10:55[diff] [blame]36
37/* If this is set, git-daemon-export-ok is not required */
David Rientjes96f1e582006-08-15 17:23:48[diff] [blame]38static int export_all_trees;
Petr Baudisf8ff0c02005-09-22 09:25:28[diff] [blame]39
Petr Baudisb21c31c2005-12-23 01:27:40[diff] [blame]40/* Take all paths relative to this one if non-NULL */
David Rientjes96f1e582006-08-15 17:23:48[diff] [blame]41static char *base_path;
Jon Loeliger49ba83f2006-09-20 01:31:51[diff] [blame]42static char *interpolated_path;
Jens Axboe73a7a652007-07-27 21:00:29[diff] [blame]43static int base_path_relaxed;
Jon Loeliger49ba83f2006-09-20 01:31:51[diff] [blame]44
45/* Flag indicating client sent extra args. */
46static int saw_extended_args;
Petr Baudisb21c31c2005-12-23 01:27:40[diff] [blame]47
Junio C Hamano603968d2006-02-05 06:27:29[diff] [blame]48/* If defined, ~user notation is allowed and the string is inserted
49 * after ~user/. E.g. a request to git://host/~alice/frotz would
50 * go to /home/alice/pub_git/frotz with --user-path=pub_git.
51 */
David Rientjes96f1e582006-08-15 17:23:48[diff] [blame]52static const char *user_path;
Junio C Hamano603968d2006-02-05 06:27:29[diff] [blame]53
H. Peter Anvin960decc2005-10-19 21:27:01[diff] [blame]54/* Timeout, and initial timeout */
David Rientjes96f1e582006-08-15 17:23:48[diff] [blame]55static unsigned int timeout;
56static unsigned int init_timeout;
Petr Baudisf8ff0c02005-09-22 09:25:28[diff] [blame]57
René Scharfe9d7ca662008-11-22 23:15:01[diff] [blame]58static char *hostname;
59static char *canon_hostname;
60static char *ip_address;
61static char *tcp_port;
Jon Loeliger49ba83f2006-09-20 01:31:51[diff] [blame]62
Petr Baudis9048fe12005-09-24 14:13:01[diff] [blame]63static void logreport(int priority, const char *err, va_list params)
Petr Baudisf8ff0c02005-09-22 09:25:28[diff] [blame]64{
Petr Baudis9048fe12005-09-24 14:13:01[diff] [blame]65 if (log_syslog) {
Stephen R. van den Berg6a992e92008-08-14 18:02:20[diff] [blame]66 char buf[1024];
67 vsnprintf(buf, sizeof(buf), err, params);
Petr Baudis9048fe12005-09-24 14:13:01[diff] [blame]68 syslog(priority, "%s", buf);
Junio C Hamano460c2012008-08-24 20:27:10[diff] [blame]69 } else {
70 /*
71 * Since stderr is set to linebuffered mode, the
Stephen R. van den Berg6a992e92008-08-14 18:02:20[diff] [blame]72 * logging of different processes will not overlap
73 */
David Soria Parra85e72832008-08-31 12:09:39[diff] [blame]74 fprintf(stderr, "[%"PRIuMAX"] ", (uintmax_t)getpid());
Stephen R. van den Berg6a992e92008-08-14 18:02:20[diff] [blame]75 vfprintf(stderr, err, params);
76 fputc('\n', stderr);
77 }
Petr Baudisf8ff0c02005-09-22 09:25:28[diff] [blame]78}
79
Pavel Roskincdda4742005-09-29 20:53:14[diff] [blame]80static void logerror(const char *err, ...)
Petr Baudisf8ff0c02005-09-22 09:25:28[diff] [blame]81{
82 va_list params;
83 va_start(params, err);
Petr Baudis9048fe12005-09-24 14:13:01[diff] [blame]84 logreport(LOG_ERR, err, params);
Petr Baudisf8ff0c02005-09-22 09:25:28[diff] [blame]85 va_end(params);
86}
87
Pavel Roskincdda4742005-09-29 20:53:14[diff] [blame]88static void loginfo(const char *err, ...)
Petr Baudisf8ff0c02005-09-22 09:25:28[diff] [blame]89{
90 va_list params;
91 if (!verbose)
92 return;
93 va_start(params, err);
Petr Baudis9048fe12005-09-24 14:13:01[diff] [blame]94 logreport(LOG_INFO, err, params);
Petr Baudisf8ff0c02005-09-22 09:25:28[diff] [blame]95 va_end(params);
96}
97
Matthias Lederhoferad8b4f52006-07-13 10:02:29[diff] [blame]98static void NORETURN daemon_die(const char *err, va_list params)
99{
100 logreport(LOG_ERR, err, params);
101 exit(1);
102}
103
Junio C Hamanod79374c2005-12-03 09:45:57[diff] [blame]104static int avoid_alias(char *p)
105{
106 int sl, ndot;
107
Junio C Hamanoa6080a02007-06-07 07:04:01[diff] [blame]108 /*
Junio C Hamanod79374c2005-12-03 09:45:57[diff] [blame]109 * This resurrects the belts and suspenders paranoia check by HPA
110 * done in <435560F7.4080006@zytor.com> thread, now enter_repo()
111 * does not do getcwd() based path canonicalizations.
112 *
113 * sl becomes true immediately after seeing '/' and continues to
114 * be true as long as dots continue after that without intervening
115 * non-dot character.
116 */
117 if (!p || (*p != '/' && *p != '~'))
118 return -1;
119 sl = 1; ndot = 0;
120 p++;
121
122 while (1) {
123 char ch = *p++;
124 if (sl) {
125 if (ch == '.')
126 ndot++;
127 else if (ch == '/') {
128 if (ndot < 3)
129 /* reject //, /./ and /../ */
130 return -1;
131 ndot = 0;
132 }
133 else if (ch == 0) {
134 if (0 < ndot && ndot < 3)
135 /* reject /.$ and /..$ */
136 return -1;
137 return 0;
138 }
139 else
140 sl = ndot = 0;
141 }
142 else if (ch == 0)
143 return 0;
144 else if (ch == '/') {
145 sl = 1;
146 ndot = 0;
147 }
148 }
149}
150
René Scharfea47551c2008-11-22 23:21:52[diff] [blame]151static char *path_ok(char *directory)
H. Peter Anvin4ae95682005-09-27 02:10:55[diff] [blame]152{
Junio C Hamano603968d2006-02-05 06:27:29[diff] [blame]153 static char rpath[PATH_MAX];
Jon Loeliger49ba83f2006-09-20 01:31:51[diff] [blame]154 static char interp_path[PATH_MAX];
Junio C Hamanod79374c2005-12-03 09:45:57[diff] [blame]155 char *path;
Jon Loeliger49ba83f2006-09-20 01:31:51[diff] [blame]156 char *dir;
157
René Scharfe9d7ca662008-11-22 23:15:01[diff] [blame]158 dir = directory;
Junio C Hamanod79374c2005-12-03 09:45:57[diff] [blame]159
160 if (avoid_alias(dir)) {
161 logerror("'%s': aliased", dir);
162 return NULL;
163 }
164
Junio C Hamano603968d2006-02-05 06:27:29[diff] [blame]165 if (*dir == '~') {
166 if (!user_path) {
167 logerror("'%s': User-path not allowed", dir);
168 return NULL;
169 }
170 if (*user_path) {
171 /* Got either "~alice" or "~alice/foo";
172 * rewrite them to "~alice/%s" or
173 * "~alice/%s/foo".
174 */
175 int namlen, restlen = strlen(dir);
176 char *slash = strchr(dir, '/');
177 if (!slash)
178 slash = dir + restlen;
179 namlen = slash - dir;
180 restlen -= namlen;
181 loginfo("userpath <%s>, request <%s>, namlen %d, restlen %d, slash <%s>", user_path, dir, namlen, restlen, slash);
182 snprintf(rpath, PATH_MAX, "%.*s/%s%.*s",
183 namlen, dir, user_path, restlen, slash);
184 dir = rpath;
185 }
186 }
Jon Loeliger49ba83f2006-09-20 01:31:51[diff] [blame]187 else if (interpolated_path && saw_extended_args) {
René Scharfe9d7ca662008-11-22 23:15:01[diff] [blame]188 struct strbuf expanded_path = STRBUF_INIT;
189 struct strbuf_expand_dict_entry dict[] = {
190 { "H", hostname },
191 { "CH", canon_hostname },
192 { "IP", ip_address },
193 { "P", tcp_port },
194 { "D", directory },
195 { "%", "%" },
196 { NULL }
197 };
198
Jon Loeliger49ba83f2006-09-20 01:31:51[diff] [blame]199 if (*dir != '/') {
200 /* Allow only absolute */
201 logerror("'%s': Non-absolute path denied (interpolated-path active)", dir);
202 return NULL;
203 }
204
René Scharfe9d7ca662008-11-22 23:15:01[diff] [blame]205 strbuf_expand(&expanded_path, interpolated_path,
206 strbuf_expand_dict_cb, &dict);
207 strlcpy(interp_path, expanded_path.buf, PATH_MAX);
208 strbuf_release(&expanded_path);
Jon Loeliger49ba83f2006-09-20 01:31:51[diff] [blame]209 loginfo("Interpolated dir '%s'", interp_path);
210
211 dir = interp_path;
212 }
Junio C Hamano603968d2006-02-05 06:27:29[diff] [blame]213 else if (base_path) {
214 if (*dir != '/') {
215 /* Allow only absolute */
Mark Wooding1fda3d52006-02-03 20:27:02[diff] [blame]216 logerror("'%s': Non-absolute path denied (base-path active)", dir);
Petr Baudisb21c31c2005-12-23 01:27:40[diff] [blame]217 return NULL;
218 }
Jon Loeliger49ba83f2006-09-20 01:31:51[diff] [blame]219 snprintf(rpath, PATH_MAX, "%s%s", base_path, dir);
220 dir = rpath;
Petr Baudisb21c31c2005-12-23 01:27:40[diff] [blame]221 }
222
René Scharfea5839712008-12-26 10:01:57[diff] [blame]223 path = enter_repo(dir, strict_paths);
224 if (!path && base_path && base_path_relaxed) {
Jens Axboe73a7a652007-07-27 21:00:29[diff] [blame]225 /*
226 * if we fail and base_path_relaxed is enabled, try without
227 * prefixing the base path
228 */
René Scharfea5839712008-12-26 10:01:57[diff] [blame]229 dir = directory;
230 path = enter_repo(dir, strict_paths);
231 }
H. Peter Anvin3e04c622005-10-19 01:26:52[diff] [blame]232
Andreas Ericsson4dbd1352005-11-17 19:37:14[diff] [blame]233 if (!path) {
Jeff King05ac6b32009-03-04 08:32:29[diff] [blame]234 logerror("'%s' does not appear to be a git repository", dir);
Andreas Ericsson4dbd1352005-11-17 19:37:14[diff] [blame]235 return NULL;
H. Peter Anvin4ae95682005-09-27 02:10:55[diff] [blame]236 }
237
238 if ( ok_paths && *ok_paths ) {
Junio C Hamanoce335fe2005-11-21 09:21:18[diff] [blame]239 char **pp;
Andreas Ericsson4dbd1352005-11-17 19:37:14[diff] [blame]240 int pathlen = strlen(path);
H. Peter Anvin4ae95682005-09-27 02:10:55[diff] [blame]241
Junio C Hamanoce335fe2005-11-21 09:21:18[diff] [blame]242 /* The validation is done on the paths after enter_repo
Junio C Hamanoa6080a02007-06-07 07:04:01[diff] [blame]243 * appends optional {.git,.git/.git} and friends, but
Junio C Hamanod79374c2005-12-03 09:45:57[diff] [blame]244 * it does not use getcwd(). So if your /pub is
245 * a symlink to /mnt/pub, you can whitelist /pub and
246 * do not have to say /mnt/pub.
247 * Do not say /pub/.
Junio C Hamanoce335fe2005-11-21 09:21:18[diff] [blame]248 */
H. Peter Anvin4ae95682005-09-27 02:10:55[diff] [blame]249 for ( pp = ok_paths ; *pp ; pp++ ) {
250 int len = strlen(*pp);
Junio C Hamanoce335fe2005-11-21 09:21:18[diff] [blame]251 if (len <= pathlen &&
252 !memcmp(*pp, path, len) &&
253 (path[len] == '\0' ||
254 (!strict_paths && path[len] == '/')))
255 return path;
H. Peter Anvin4ae95682005-09-27 02:10:55[diff] [blame]256 }
Andreas Ericsson4dbd1352005-11-17 19:37:14[diff] [blame]257 }
258 else {
259 /* be backwards compatible */
260 if (!strict_paths)
261 return path;
H. Peter Anvin4ae95682005-09-27 02:10:55[diff] [blame]262 }
263
Andreas Ericsson4dbd1352005-11-17 19:37:14[diff] [blame]264 logerror("'%s': not in whitelist", path);
265 return NULL; /* Fallthrough. Deny by default */
H. Peter Anvin4ae95682005-09-27 02:10:55[diff] [blame]266}
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]267
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]268typedef int (*daemon_service_fn)(void);
269struct daemon_service {
270 const char *name;
271 const char *config_name;
272 daemon_service_fn fn;
273 int enabled;
274 int overridable;
275};
H. Peter Anvin4ae95682005-09-27 02:10:55[diff] [blame]276
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]277static struct daemon_service *service_looking_at;
278static int service_enabled;
279
Johannes Schindelinef90d6d2008-05-14 17:46:53[diff] [blame]280static int git_daemon_config(const char *var, const char *value, void *cb)
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]281{
Junio C Hamanocc44c762007-02-20 09:53:29[diff] [blame]282 if (!prefixcmp(var, "daemon.") &&
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]283 !strcmp(var + 7, service_looking_at->config_name)) {
284 service_enabled = git_config_bool(var, value);
285 return 0;
286 }
287
288 /* we are not interested in parsing any other configuration here */
289 return 0;
290}
291
René Scharfea47551c2008-11-22 23:21:52[diff] [blame]292static int run_service(char *dir, struct daemon_service *service)
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]293{
294 const char *path;
295 int enabled = service->enabled;
296
René Scharfea47551c2008-11-22 23:21:52[diff] [blame]297 loginfo("Request %s for '%s'", service->name, dir);
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]298
299 if (!enabled && !service->overridable) {
300 logerror("'%s': service not enabled.", service->name);
301 errno = EACCES;
302 return -1;
303 }
Andreas Ericsson4dbd1352005-11-17 19:37:14[diff] [blame]304
René Scharfea47551c2008-11-22 23:21:52[diff] [blame]305 if (!(path = path_ok(dir)))
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]306 return -1;
H. Peter Anvin47888f02005-09-27 15:49:40[diff] [blame]307
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]308 /*
309 * Security on the cheap.
310 *
Junio C Hamanoa935c392005-10-21 06:19:36[diff] [blame]311 * We want a readable HEAD, usable "objects" directory, and
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]312 * a "git-daemon-export-ok" flag that says that the other side
313 * is ok with us doing this.
Andreas Ericsson4dbd1352005-11-17 19:37:14[diff] [blame]314 *
315 * path_ok() uses enter_repo() and does whitelist checking.
316 * We only need to make sure the repository is exported.
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]317 */
Andreas Ericsson4dbd1352005-11-17 19:37:14[diff] [blame]318
H. Peter Anvin3e04c622005-10-19 01:26:52[diff] [blame]319 if (!export_all_trees && access("git-daemon-export-ok", F_OK)) {
Andreas Ericsson4dbd1352005-11-17 19:37:14[diff] [blame]320 logerror("'%s': repository not exported.", path);
H. Peter Anvin3e04c622005-10-19 01:26:52[diff] [blame]321 errno = EACCES;
322 return -1;
323 }
324
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]325 if (service->overridable) {
326 service_looking_at = service;
327 service_enabled = -1;
Johannes Schindelinef90d6d2008-05-14 17:46:53[diff] [blame]328 git_config(git_daemon_config, NULL);
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]329 if (0 <= service_enabled)
330 enabled = service_enabled;
331 }
332 if (!enabled) {
333 logerror("'%s': service not enabled for '%s'",
334 service->name, path);
335 errno = EACCES;
336 return -1;
337 }
338
Linus Torvalds02d57da2005-07-16 05:53:31[diff] [blame]339 /*
340 * We'll ignore SIGTERM from now on, we have a
341 * good client.
342 */
343 signal(SIGTERM, SIG_IGN);
344
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]345 return service->fn();
346}
347
Johannes Sixt5d87dd42009-06-14 20:38:51[diff] [blame]348static void copy_to_log(int fd)
349{
350 struct strbuf line = STRBUF_INIT;
351 FILE *fp;
352
353 fp = fdopen(fd, "r");
354 if (fp == NULL) {
355 logerror("fdopen of error channel failed");
356 close(fd);
357 return;
358 }
359
360 while (strbuf_getline(&line, fp, '\n') != EOF) {
361 logerror("%s", line.buf);
362 strbuf_setlen(&line, 0);
363 }
364
365 strbuf_release(&line);
366 fclose(fp);
367}
368
369static int run_service_command(const char **argv)
370{
371 struct child_process cld;
372
373 memset(&cld, 0, sizeof(cld));
374 cld.argv = argv;
375 cld.git_cmd = 1;
376 cld.err = -1;
377 if (start_command(&cld))
378 return -1;
379
380 close(0);
381 close(1);
382
383 copy_to_log(cld.err);
384
385 return finish_command(&cld);
386}
387
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]388static int upload_pack(void)
389{
390 /* Timeout as string */
391 char timeout_buf[64];
Johannes Sixt5d87dd42009-06-14 20:38:51[diff] [blame]392 const char *argv[] = { "upload-pack", "--strict", timeout_buf, ".", NULL };
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]393
H. Peter Anvin960decc2005-10-19 21:27:01[diff] [blame]394 snprintf(timeout_buf, sizeof timeout_buf, "--timeout=%u", timeout);
Johannes Sixt5d87dd42009-06-14 20:38:51[diff] [blame]395 return run_service_command(argv);
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]396}
397
Franck Bui-Huu39345a22006-09-07 13:12:05[diff] [blame]398static int upload_archive(void)
399{
Johannes Sixt5d87dd42009-06-14 20:38:51[diff] [blame]400 static const char *argv[] = { "upload-archive", ".", NULL };
401 return run_service_command(argv);
Franck Bui-Huu39345a22006-09-07 13:12:05[diff] [blame]402}
403
Linus Torvalds4b3b1e12007-01-21 19:04:13[diff] [blame]404static int receive_pack(void)
405{
Johannes Sixt5d87dd42009-06-14 20:38:51[diff] [blame]406 static const char *argv[] = { "receive-pack", ".", NULL };
407 return run_service_command(argv);
Linus Torvalds4b3b1e12007-01-21 19:04:13[diff] [blame]408}
409
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]410static struct daemon_service daemon_service[] = {
Franck Bui-Huu39345a22006-09-07 13:12:05[diff] [blame]411 { "upload-archive", "uploadarch", upload_archive, 0, 1 },
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]412 { "upload-pack", "uploadpack", upload_pack, 1, 1 },
Linus Torvalds4b3b1e12007-01-21 19:04:13[diff] [blame]413 { "receive-pack", "receivepack", receive_pack, 0, 1 },
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]414};
415
Junio C Hamanof3fa1832007-11-08 23:35:32[diff] [blame]416static void enable_service(const char *name, int ena)
417{
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]418 int i;
419 for (i = 0; i < ARRAY_SIZE(daemon_service); i++) {
420 if (!strcmp(daemon_service[i].name, name)) {
421 daemon_service[i].enabled = ena;
422 return;
423 }
424 }
425 die("No such service %s", name);
426}
427
Junio C Hamanof3fa1832007-11-08 23:35:32[diff] [blame]428static void make_service_overridable(const char *name, int ena)
429{
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]430 int i;
431 for (i = 0; i < ARRAY_SIZE(daemon_service); i++) {
432 if (!strcmp(daemon_service[i].name, name)) {
433 daemon_service[i].overridable = ena;
434 return;
435 }
436 }
437 die("No such service %s", name);
438}
439
René Scharfe6720e952008-12-26 10:12:15[diff] [blame]440static char *xstrdup_tolower(const char *str)
441{
442 char *p, *dup = xstrdup(str);
443 for (p = dup; *p; p++)
444 *p = tolower(*p);
445 return dup;
446}
447
Jon Loeligereb30aed2006-09-27 16:16:10[diff] [blame]448/*
Shawn O. Pearce73bb33a2009-06-05 01:33:32[diff] [blame]449 * Read the host as supplied by the client connection.
Jon Loeligereb30aed2006-09-27 16:16:10[diff] [blame]450 */
Shawn O. Pearce73bb33a2009-06-05 01:33:32[diff] [blame]451static void parse_host_arg(char *extra_args, int buflen)
Jon Loeliger49ba83f2006-09-20 01:31:51[diff] [blame]452{
453 char *val;
454 int vallen;
455 char *end = extra_args + buflen;
456
Shawn O. Pearce73bb33a2009-06-05 01:33:32[diff] [blame]457 if (extra_args < end && *extra_args) {
Jon Loeliger49ba83f2006-09-20 01:31:51[diff] [blame]458 saw_extended_args = 1;
459 if (strncasecmp("host=", extra_args, 5) == 0) {
460 val = extra_args + 5;
461 vallen = strlen(val) + 1;
462 if (*val) {
Jon Loeligereb30aed2006-09-27 16:16:10[diff] [blame]463 /* Split <host>:<port> at colon. */
464 char *host = val;
465 char *port = strrchr(host, ':');
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]466 if (port) {
467 *port = 0;
468 port++;
René Scharfe9d7ca662008-11-22 23:15:01[diff] [blame]469 free(tcp_port);
470 tcp_port = xstrdup(port);
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]471 }
René Scharfe9d7ca662008-11-22 23:15:01[diff] [blame]472 free(hostname);
René Scharfe6720e952008-12-26 10:12:15[diff] [blame]473 hostname = xstrdup_tolower(host);
Jon Loeliger49ba83f2006-09-20 01:31:51[diff] [blame]474 }
Jon Loeligereb30aed2006-09-27 16:16:10[diff] [blame]475
Jon Loeliger49ba83f2006-09-20 01:31:51[diff] [blame]476 /* On to the next one */
477 extra_args = val + vallen;
478 }
Shawn O. Pearce73bb33a2009-06-05 01:33:32[diff] [blame]479 if (extra_args < end && *extra_args)
480 die("Invalid request");
Jon Loeliger49ba83f2006-09-20 01:31:51[diff] [blame]481 }
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]482
483 /*
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]484 * Locate canonical hostname and its IP address.
485 */
René Scharfe6720e952008-12-26 10:12:15[diff] [blame]486 if (hostname) {
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]487#ifndef NO_IPV6
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]488 struct addrinfo hints;
Benjamin Kramer3e8a00a2009-04-27 13:59:49[diff] [blame]489 struct addrinfo *ai;
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]490 int gai;
491 static char addrbuf[HOST_NAME_MAX + 1];
492
493 memset(&hints, 0, sizeof(hints));
494 hints.ai_flags = AI_CANONNAME;
495
Linus Torvalds2af202b2009-06-18 17:28:43[diff] [blame]496 gai = getaddrinfo(hostname, NULL, &hints, &ai);
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]497 if (!gai) {
Benjamin Kramer3e8a00a2009-04-27 13:59:49[diff] [blame]498 struct sockaddr_in *sin_addr = (void *)ai->ai_addr;
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]499
Benjamin Kramer3e8a00a2009-04-27 13:59:49[diff] [blame]500 inet_ntop(AF_INET, &sin_addr->sin_addr,
501 addrbuf, sizeof(addrbuf));
502 free(ip_address);
503 ip_address = xstrdup(addrbuf);
504
505 free(canon_hostname);
506 canon_hostname = xstrdup(ai->ai_canonname ?
507 ai->ai_canonname : ip_address);
508
509 freeaddrinfo(ai);
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]510 }
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]511#else
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]512 struct hostent *hent;
513 struct sockaddr_in sa;
514 char **ap;
515 static char addrbuf[HOST_NAME_MAX + 1];
516
René Scharfe9d7ca662008-11-22 23:15:01[diff] [blame]517 hent = gethostbyname(hostname);
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]518
519 ap = hent->h_addr_list;
520 memset(&sa, 0, sizeof sa);
521 sa.sin_family = hent->h_addrtype;
522 sa.sin_port = htons(0);
523 memcpy(&sa.sin_addr, *ap, hent->h_length);
524
525 inet_ntop(hent->h_addrtype, &sa.sin_addr,
526 addrbuf, sizeof(addrbuf));
Jon Loeligereb30aed2006-09-27 16:16:10[diff] [blame]527
René Scharfe9d7ca662008-11-22 23:15:01[diff] [blame]528 free(canon_hostname);
529 canon_hostname = xstrdup(hent->h_name);
530 free(ip_address);
531 ip_address = xstrdup(addrbuf);
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]532#endif
René Scharfe6720e952008-12-26 10:12:15[diff] [blame]533 }
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]534}
535
536
David Woodhouse5b276ee2006-06-20 14:38:13[diff] [blame]537static int execute(struct sockaddr *addr)
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]538{
Linus Torvalds7d806942005-07-15 16:27:05[diff] [blame]539 static char line[1000];
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]540 int pktlen, len, i;
Linus Torvalds7d806942005-07-15 16:27:05[diff] [blame]541
David Woodhouse5b276ee2006-06-20 14:38:13[diff] [blame]542 if (addr) {
543 char addrbuf[256] = "";
544 int port = -1;
545
546 if (addr->sa_family == AF_INET) {
547 struct sockaddr_in *sin_addr = (void *) addr;
548 inet_ntop(addr->sa_family, &sin_addr->sin_addr, addrbuf, sizeof(addrbuf));
Gerrit Papec67359b2007-11-05 09:16:22[diff] [blame]549 port = ntohs(sin_addr->sin_port);
David Woodhouse5b276ee2006-06-20 14:38:13[diff] [blame]550#ifndef NO_IPV6
551 } else if (addr && addr->sa_family == AF_INET6) {
552 struct sockaddr_in6 *sin6_addr = (void *) addr;
553
554 char *buf = addrbuf;
555 *buf++ = '['; *buf = '\0'; /* stpcpy() is cool */
556 inet_ntop(AF_INET6, &sin6_addr->sin6_addr, buf, sizeof(addrbuf) - 1);
557 strcat(buf, "]");
558
Gerrit Papec67359b2007-11-05 09:16:22[diff] [blame]559 port = ntohs(sin6_addr->sin6_port);
David Woodhouse5b276ee2006-06-20 14:38:13[diff] [blame]560#endif
561 }
562 loginfo("Connection from %s:%d", addrbuf, port);
Joey Hess53ffb872008-10-24 05:48:50[diff] [blame]563 setenv("REMOTE_ADDR", addrbuf, 1);
564 }
565 else {
566 unsetenv("REMOTE_ADDR");
David Woodhouse5b276ee2006-06-20 14:38:13[diff] [blame]567 }
568
H. Peter Anvin960decc2005-10-19 21:27:01[diff] [blame]569 alarm(init_timeout ? init_timeout : timeout);
Jon Loeliger5ad312b2006-06-07 03:58:41[diff] [blame]570 pktlen = packet_read_line(0, line, sizeof(line));
H. Peter Anvin960decc2005-10-19 21:27:01[diff] [blame]571 alarm(0);
Linus Torvalds7d806942005-07-15 16:27:05[diff] [blame]572
Jon Loeliger5ad312b2006-06-07 03:58:41[diff] [blame]573 len = strlen(line);
574 if (pktlen != len)
575 loginfo("Extended attributes (%d bytes) exist <%.*s>",
576 (int) pktlen - len,
577 (int) pktlen - len, line + len + 1);
Junio C Hamano83543a22006-10-24 01:26:05[diff] [blame]578 if (len && line[len-1] == '\n') {
Linus Torvalds7d806942005-07-15 16:27:05[diff] [blame]579 line[--len] = 0;
Junio C Hamano83543a22006-10-24 01:26:05[diff] [blame]580 pktlen--;
581 }
Linus Torvalds7d806942005-07-15 16:27:05[diff] [blame]582
René Scharfe9d7ca662008-11-22 23:15:01[diff] [blame]583 free(hostname);
584 free(canon_hostname);
585 free(ip_address);
586 free(tcp_port);
René Scharfea47551c2008-11-22 23:21:52[diff] [blame]587 hostname = canon_hostname = ip_address = tcp_port = NULL;
Jon Loeligereb30aed2006-09-27 16:16:10[diff] [blame]588
René Scharfed433ed02008-11-22 23:19:09[diff] [blame]589 if (len != pktlen)
Shawn O. Pearce73bb33a2009-06-05 01:33:32[diff] [blame]590 parse_host_arg(line + len + 1, pktlen - len - 1);
Jon Loeliger49ba83f2006-09-20 01:31:51[diff] [blame]591
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]592 for (i = 0; i < ARRAY_SIZE(daemon_service); i++) {
593 struct daemon_service *s = &(daemon_service[i]);
594 int namelen = strlen(s->name);
Junio C Hamano599065a2007-02-20 09:54:00[diff] [blame]595 if (!prefixcmp(line, "git-") &&
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]596 !strncmp(s->name, line + 4, namelen) &&
Jon Loeliger49ba83f2006-09-20 01:31:51[diff] [blame]597 line[namelen + 4] == ' ') {
Jon Loeligereb30aed2006-09-27 16:16:10[diff] [blame]598 /*
599 * Note: The directory here is probably context sensitive,
600 * and might depend on the actual service being performed.
601 */
René Scharfea47551c2008-11-22 23:21:52[diff] [blame]602 return run_service(line + namelen + 5, s);
Jon Loeliger49ba83f2006-09-20 01:31:51[diff] [blame]603 }
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]604 }
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]605
Petr Baudisf8ff0c02005-09-22 09:25:28[diff] [blame]606 logerror("Protocol error: '%s'", line);
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]607 return -1;
608}
609
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]610static int max_connections = 32;
Linus Torvalds66e631d2005-07-16 04:51:57[diff] [blame]611
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]612static unsigned int live_children;
Linus Torvalds66e631d2005-07-16 04:51:57[diff] [blame]613
Linus Torvalds4d8fa912005-08-01 19:11:53[diff] [blame]614static struct child {
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]615 struct child *next;
Linus Torvalds66e631d2005-07-16 04:51:57[diff] [blame]616 pid_t pid;
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]617 struct sockaddr_storage address;
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]618} *firstborn;
Linus Torvalds66e631d2005-07-16 04:51:57[diff] [blame]619
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]620static void add_child(pid_t pid, struct sockaddr *addr, int addrlen)
Linus Torvalds66e631d2005-07-16 04:51:57[diff] [blame]621{
Junio C Hamano460c2012008-08-24 20:27:10[diff] [blame]622 struct child *newborn, **cradle;
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]623
Junio C Hamano460c2012008-08-24 20:27:10[diff] [blame]624 /*
625 * This must be xcalloc() -- we'll compare the whole sockaddr_storage
626 * but individual address may be shorter.
627 */
628 newborn = xcalloc(1, sizeof(*newborn));
629 live_children++;
630 newborn->pid = pid;
631 memcpy(&newborn->address, addr, addrlen);
632 for (cradle = &firstborn; *cradle; cradle = &(*cradle)->next)
633 if (!memcmp(&(*cradle)->address, &newborn->address,
634 sizeof(newborn->address)))
635 break;
636 newborn->next = *cradle;
637 *cradle = newborn;
Linus Torvalds66e631d2005-07-16 04:51:57[diff] [blame]638}
639
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]640static void remove_child(pid_t pid)
Linus Torvalds66e631d2005-07-16 04:51:57[diff] [blame]641{
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]642 struct child **cradle, *blanket;
Linus Torvalds66e631d2005-07-16 04:51:57[diff] [blame]643
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]644 for (cradle = &firstborn; (blanket = *cradle); cradle = &blanket->next)
645 if (blanket->pid == pid) {
646 *cradle = blanket->next;
647 live_children--;
648 free(blanket);
649 break;
650 }
Linus Torvalds66e631d2005-07-16 04:51:57[diff] [blame]651}
652
653/*
654 * This gets called if the number of connections grows
655 * past "max_connections".
656 *
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]657 * We kill the newest connection from a duplicate IP.
Linus Torvalds66e631d2005-07-16 04:51:57[diff] [blame]658 */
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]659static void kill_some_child(void)
Linus Torvalds66e631d2005-07-16 04:51:57[diff] [blame]660{
Junio C Hamano460c2012008-08-24 20:27:10[diff] [blame]661 const struct child *blanket, *next;
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]662
Junio C Hamano460c2012008-08-24 20:27:10[diff] [blame]663 if (!(blanket = firstborn))
664 return;
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]665
Junio C Hamano460c2012008-08-24 20:27:10[diff] [blame]666 for (; (next = blanket->next); blanket = next)
667 if (!memcmp(&blanket->address, &next->address,
668 sizeof(next->address))) {
669 kill(blanket->pid, SIGTERM);
670 break;
671 }
Linus Torvalds66e631d2005-07-16 04:51:57[diff] [blame]672}
673
Johannes Schindelina5a91262008-07-03 15:27:24[diff] [blame]674static void check_dead_children(void)
675{
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]676 int status;
677 pid_t pid;
Johannes Schindelina5a91262008-07-03 15:27:24[diff] [blame]678
Junio C Hamano460c2012008-08-24 20:27:10[diff] [blame]679 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]680 const char *dead = "";
681 remove_child(pid);
Junio C Hamano460c2012008-08-24 20:27:10[diff] [blame]682 if (!WIFEXITED(status) || (WEXITSTATUS(status) > 0))
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]683 dead = " (with error)";
David Soria Parra85e72832008-08-31 12:09:39[diff] [blame]684 loginfo("[%"PRIuMAX"] Disconnected%s", (uintmax_t)pid, dead);
Linus Torvalds02d57da2005-07-16 05:53:31[diff] [blame]685 }
686}
687
Junio C Hamano7fa09082005-09-11 20:58:41[diff] [blame]688static void handle(int incoming, struct sockaddr *addr, int addrlen)
Linus Torvalds02d57da2005-07-16 05:53:31[diff] [blame]689{
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]690 pid_t pid;
Linus Torvalds02d57da2005-07-16 05:53:31[diff] [blame]691
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]692 if (max_connections && live_children >= max_connections) {
693 kill_some_child();
Junio C Hamano460c2012008-08-24 20:27:10[diff] [blame]694 sleep(1); /* give it some time to die */
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]695 check_dead_children();
696 if (live_children >= max_connections) {
697 close(incoming);
698 logerror("Too many children, dropping connection");
Linus Torvalds02d57da2005-07-16 05:53:31[diff] [blame]699 return;
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]700 }
701 }
Linus Torvalds02d57da2005-07-16 05:53:31[diff] [blame]702
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]703 if ((pid = fork())) {
704 close(incoming);
705 if (pid < 0) {
706 logerror("Couldn't fork %s", strerror(errno));
707 return;
708 }
Linus Torvalds02d57da2005-07-16 05:53:31[diff] [blame]709
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]710 add_child(pid, addr, addrlen);
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]711 return;
712 }
713
714 dup2(incoming, 0);
715 dup2(incoming, 1);
716 close(incoming);
Petr Baudisf8ff0c02005-09-22 09:25:28[diff] [blame]717
David Woodhouse5b276ee2006-06-20 14:38:13[diff] [blame]718 exit(execute(addr));
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]719}
720
Linus Torvaldseaa94912005-07-16 03:42:28[diff] [blame]721static void child_handler(int signo)
722{
Junio C Hamano460c2012008-08-24 20:27:10[diff] [blame]723 /*
724 * Otherwise empty handler because systemcalls will get interrupted
Stephen R. van den Berg695605b2008-08-14 18:02:20[diff] [blame]725 * upon signal receipt
726 * SysV needs the handler to be rearmed
727 */
Stephen R. van den Bergbd7b3712008-08-12 19:36:13[diff] [blame]728 signal(SIGCHLD, child_handler);
Linus Torvaldseaa94912005-07-16 03:42:28[diff] [blame]729}
730
Mark Wooding1955fab2006-02-03 20:27:04[diff] [blame]731static int set_reuse_addr(int sockfd)
732{
733 int on = 1;
734
735 if (!reuseaddr)
736 return 0;
737 return setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR,
738 &on, sizeof(on));
739}
740
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]741#ifndef NO_IPV6
742
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]743static int socksetup(char *listen_addr, int listen_port, int **socklist_p)
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]744{
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]745 int socknum = 0, *socklist = NULL;
746 int maxfd = -1;
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]747 char pbuf[NI_MAXSERV];
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]748 struct addrinfo hints, *ai0, *ai;
749 int gai;
Alexandre Julliard20276882007-02-14 17:10:26[diff] [blame]750 long flags;
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]751
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]752 sprintf(pbuf, "%d", listen_port);
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]753 memset(&hints, 0, sizeof(hints));
754 hints.ai_family = AF_UNSPEC;
755 hints.ai_socktype = SOCK_STREAM;
756 hints.ai_protocol = IPPROTO_TCP;
757 hints.ai_flags = AI_PASSIVE;
758
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]759 gai = getaddrinfo(listen_addr, pbuf, &hints, &ai0);
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]760 if (gai)
Alexander Potashevd7530702009-01-04 18:38:41[diff] [blame]761 die("getaddrinfo() failed: %s", gai_strerror(gai));
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]762
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]763 for (ai = ai0; ai; ai = ai->ai_next) {
764 int sockfd;
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]765
766 sockfd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
767 if (sockfd < 0)
768 continue;
769 if (sockfd >= FD_SETSIZE) {
Stephen R. van den Bergdf0daf82008-08-14 18:02:20[diff] [blame]770 logerror("Socket descriptor too large");
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]771 close(sockfd);
772 continue;
773 }
774
775#ifdef IPV6_V6ONLY
776 if (ai->ai_family == AF_INET6) {
777 int on = 1;
778 setsockopt(sockfd, IPPROTO_IPV6, IPV6_V6ONLY,
779 &on, sizeof(on));
780 /* Note: error is not fatal */
781 }
782#endif
783
Mark Wooding1955fab2006-02-03 20:27:04[diff] [blame]784 if (set_reuse_addr(sockfd)) {
785 close(sockfd);
Serge E. Hallyn0032d542006-04-18 13:11:06[diff] [blame]786 continue;
Mark Wooding1955fab2006-02-03 20:27:04[diff] [blame]787 }
788
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]789 if (bind(sockfd, ai->ai_addr, ai->ai_addrlen) < 0) {
790 close(sockfd);
791 continue; /* not fatal */
792 }
793 if (listen(sockfd, 5) < 0) {
794 close(sockfd);
795 continue; /* not fatal */
796 }
797
Alexandre Julliard20276882007-02-14 17:10:26[diff] [blame]798 flags = fcntl(sockfd, F_GETFD, 0);
799 if (flags >= 0)
800 fcntl(sockfd, F_SETFD, flags | FD_CLOEXEC);
801
Jonas Fonseca83572c12006-08-26 14:16:18[diff] [blame]802 socklist = xrealloc(socklist, sizeof(int) * (socknum + 1));
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]803 socklist[socknum++] = sockfd;
804
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]805 if (maxfd < sockfd)
806 maxfd = sockfd;
807 }
808
809 freeaddrinfo(ai0);
810
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]811 *socklist_p = socklist;
812 return socknum;
813}
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]814
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]815#else /* NO_IPV6 */
816
Alex Riesen100690b2006-09-28 18:48:14[diff] [blame]817static int socksetup(char *listen_addr, int listen_port, int **socklist_p)
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]818{
819 struct sockaddr_in sin;
820 int sockfd;
Alexandre Julliard20276882007-02-14 17:10:26[diff] [blame]821 long flags;
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]822
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]823 memset(&sin, 0, sizeof sin);
824 sin.sin_family = AF_INET;
825 sin.sin_port = htons(listen_port);
826
827 if (listen_addr) {
828 /* Well, host better be an IP address here. */
829 if (inet_pton(AF_INET, listen_addr, &sin.sin_addr.s_addr) <= 0)
830 return 0;
831 } else {
832 sin.sin_addr.s_addr = htonl(INADDR_ANY);
833 }
834
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]835 sockfd = socket(AF_INET, SOCK_STREAM, 0);
836 if (sockfd < 0)
837 return 0;
838
Mark Wooding1955fab2006-02-03 20:27:04[diff] [blame]839 if (set_reuse_addr(sockfd)) {
840 close(sockfd);
841 return 0;
842 }
843
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]844 if ( bind(sockfd, (struct sockaddr *)&sin, sizeof sin) < 0 ) {
845 close(sockfd);
846 return 0;
847 }
848
Paul Sericef35230f2005-11-21 17:07:23[diff] [blame]849 if (listen(sockfd, 5) < 0) {
850 close(sockfd);
851 return 0;
852 }
853
Alexandre Julliard20276882007-02-14 17:10:26[diff] [blame]854 flags = fcntl(sockfd, F_GETFD, 0);
855 if (flags >= 0)
856 fcntl(sockfd, F_SETFD, flags | FD_CLOEXEC);
857
H. Peter Anvin1b4713f2005-09-30 17:47:50[diff] [blame]858 *socklist_p = xmalloc(sizeof(int));
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]859 **socklist_p = sockfd;
Paul Sericef35230f2005-11-21 17:07:23[diff] [blame]860 return 1;
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]861}
862
863#endif
864
865static int service_loop(int socknum, int *socklist)
866{
867 struct pollfd *pfd;
868 int i;
869
Stephen R. van den Berg695605b2008-08-14 18:02:20[diff] [blame]870 pfd = xcalloc(socknum, sizeof(struct pollfd));
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]871
872 for (i = 0; i < socknum; i++) {
873 pfd[i].fd = socklist[i];
874 pfd[i].events = POLLIN;
875 }
H. Peter Anvin92202822005-09-30 18:01:57[diff] [blame]876
877 signal(SIGCHLD, child_handler);
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]878
879 for (;;) {
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]880 int i;
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]881
Stephen R. van den Berg695605b2008-08-14 18:02:20[diff] [blame]882 check_dead_children();
883
884 if (poll(pfd, socknum, -1) < 0) {
Junio C Hamano1eef0b32005-07-26 20:26:52[diff] [blame]885 if (errno != EINTR) {
Stephen R. van den Bergdf0daf82008-08-14 18:02:20[diff] [blame]886 logerror("Poll failed, resuming: %s",
Junio C Hamano1eef0b32005-07-26 20:26:52[diff] [blame]887 strerror(errno));
888 sleep(1);
889 }
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]890 continue;
891 }
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]892
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]893 for (i = 0; i < socknum; i++) {
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]894 if (pfd[i].revents & POLLIN) {
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]895 struct sockaddr_storage ss;
H. Peter Anvin7626e492005-09-30 17:48:21[diff] [blame]896 unsigned int sslen = sizeof(ss);
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]897 int incoming = accept(pfd[i].fd, (struct sockaddr *)&ss, &sslen);
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]898 if (incoming < 0) {
899 switch (errno) {
900 case EAGAIN:
901 case EINTR:
902 case ECONNABORTED:
903 continue;
904 default:
Thomas Rastd824cbb2009-06-27 15:58:46[diff] [blame]905 die_errno("accept returned");
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]906 }
907 }
908 handle(incoming, (struct sockaddr *)&ss, sslen);
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]909 }
910 }
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]911 }
912}
913
Matthias Lederhofer258e93a2006-07-13 16:32:11[diff] [blame]914/* if any standard file descriptor is missing open it to /dev/null */
915static void sanitize_stdfds(void)
916{
917 int fd = open("/dev/null", O_RDWR, 0);
918 while (fd != -1 && fd < 2)
919 fd = dup(fd);
920 if (fd == -1)
Thomas Rastd824cbb2009-06-27 15:58:46[diff] [blame]921 die_errno("open /dev/null or dup failed");
Matthias Lederhofer258e93a2006-07-13 16:32:11[diff] [blame]922 if (fd > 2)
923 close(fd);
924}
925
Matthias Lederhofera5262762006-07-13 16:47:13[diff] [blame]926static void daemonize(void)
927{
928 switch (fork()) {
929 case 0:
930 break;
931 case -1:
Thomas Rastd824cbb2009-06-27 15:58:46[diff] [blame]932 die_errno("fork failed");
Matthias Lederhofera5262762006-07-13 16:47:13[diff] [blame]933 default:
934 exit(0);
935 }
936 if (setsid() == -1)
Thomas Rastd824cbb2009-06-27 15:58:46[diff] [blame]937 die_errno("setsid failed");
Matthias Lederhofera5262762006-07-13 16:47:13[diff] [blame]938 close(0);
939 close(1);
940 close(2);
941 sanitize_stdfds();
942}
943
Matthias Lederhofer45ed5d72006-07-13 10:18:08[diff] [blame]944static void store_pid(const char *path)
945{
946 FILE *f = fopen(path, "w");
947 if (!f)
Thomas Rastd824cbb2009-06-27 15:58:46[diff] [blame]948 die_errno("cannot open pid file '%s'", path);
David Soria Parra85e72832008-08-31 12:09:39[diff] [blame]949 if (fprintf(f, "%"PRIuMAX"\n", (uintmax_t) getpid()) < 0 || fclose(f) != 0)
Thomas Rastd824cbb2009-06-27 15:58:46[diff] [blame]950 die_errno("failed to write pid file '%s'", path);
Matthias Lederhofer45ed5d72006-07-13 10:18:08[diff] [blame]951}
952
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]953static int serve(char *listen_addr, int listen_port, struct passwd *pass, gid_t gid)
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]954{
955 int socknum, *socklist;
Junio C Hamano4ae22d92005-10-21 06:21:50[diff] [blame]956
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]957 socknum = socksetup(listen_addr, listen_port, &socklist);
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]958 if (socknum == 0)
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]959 die("unable to allocate any listen sockets on host %s port %u",
960 listen_addr, listen_port);
Junio C Hamano4ae22d92005-10-21 06:21:50[diff] [blame]961
Tilman Sauerbeck678dac62006-08-22 17:37:41[diff] [blame]962 if (pass && gid &&
963 (initgroups(pass->pw_name, gid) || setgid (gid) ||
964 setuid(pass->pw_uid)))
965 die("cannot drop privileges");
966
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]967 return service_loop(socknum, socklist);
Junio C Hamano4ae22d92005-10-21 06:21:50[diff] [blame]968}
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]969
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]970int main(int argc, char **argv)
971{
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]972 int listen_port = 0;
973 char *listen_addr = NULL;
Linus Torvaldse64e1b72005-07-15 16:32:16[diff] [blame]974 int inetd_mode = 0;
Tilman Sauerbeck678dac62006-08-22 17:37:41[diff] [blame]975 const char *pid_file = NULL, *user_name = NULL, *group_name = NULL;
Matthias Lederhofera5262762006-07-13 16:47:13[diff] [blame]976 int detach = 0;
Tilman Sauerbeck678dac62006-08-22 17:37:41[diff] [blame]977 struct passwd *pass = NULL;
978 struct group *group;
979 gid_t gid = 0;
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]980 int i;
981
Steffen Prohaska2fb3f6d2009-01-18 12:00:12[diff] [blame]982 git_extract_argv0_path(argv[0]);
983
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]984 for (i = 1; i < argc; i++) {
985 char *arg = argv[i];
986
Junio C Hamanocc44c762007-02-20 09:53:29[diff] [blame]987 if (!prefixcmp(arg, "--listen=")) {
René Scharfe6720e952008-12-26 10:12:15[diff] [blame]988 listen_addr = xstrdup_tolower(arg + 9);
989 continue;
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]990 }
Junio C Hamanocc44c762007-02-20 09:53:29[diff] [blame]991 if (!prefixcmp(arg, "--port=")) {
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]992 char *end;
993 unsigned long n;
994 n = strtoul(arg+7, &end, 0);
995 if (arg[7] && !*end) {
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]996 listen_port = n;
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]997 continue;
998 }
999 }
Linus Torvaldse64e1b72005-07-15 16:32:16[diff] [blame]1000 if (!strcmp(arg, "--inetd")) {
1001 inetd_mode = 1;
Andreas Ericssona8883282005-11-16 23:38:29[diff] [blame]1002 log_syslog = 1;
Linus Torvaldse64e1b72005-07-15 16:32:16[diff] [blame]1003 continue;
1004 }
Petr Baudisf8ff0c02005-09-22 09:25:28[diff] [blame]1005 if (!strcmp(arg, "--verbose")) {
1006 verbose = 1;
1007 continue;
1008 }
Petr Baudis9048fe12005-09-24 14:13:01[diff] [blame]1009 if (!strcmp(arg, "--syslog")) {
1010 log_syslog = 1;
Petr Baudis9048fe12005-09-24 14:13:01[diff] [blame]1011 continue;
1012 }
H. Peter Anvin4ae95682005-09-27 02:10:55[diff] [blame]1013 if (!strcmp(arg, "--export-all")) {
1014 export_all_trees = 1;
1015 continue;
1016 }
Junio C Hamanocc44c762007-02-20 09:53:29[diff] [blame]1017 if (!prefixcmp(arg, "--timeout=")) {
H. Peter Anvin960decc2005-10-19 21:27:01[diff] [blame]1018 timeout = atoi(arg+10);
Andreas Ericssona8883282005-11-16 23:38:29[diff] [blame]1019 continue;
H. Peter Anvin960decc2005-10-19 21:27:01[diff] [blame]1020 }
Junio C Hamanocc44c762007-02-20 09:53:29[diff] [blame]1021 if (!prefixcmp(arg, "--init-timeout=")) {
H. Peter Anvin960decc2005-10-19 21:27:01[diff] [blame]1022 init_timeout = atoi(arg+15);
Andreas Ericssona8883282005-11-16 23:38:29[diff] [blame]1023 continue;
H. Peter Anvin960decc2005-10-19 21:27:01[diff] [blame]1024 }
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]1025 if (!prefixcmp(arg, "--max-connections=")) {
1026 max_connections = atoi(arg+18);
1027 if (max_connections < 0)
1028 max_connections = 0; /* unlimited */
1029 continue;
1030 }
Andreas Ericsson4dbd1352005-11-17 19:37:14[diff] [blame]1031 if (!strcmp(arg, "--strict-paths")) {
1032 strict_paths = 1;
1033 continue;
1034 }
Junio C Hamanocc44c762007-02-20 09:53:29[diff] [blame]1035 if (!prefixcmp(arg, "--base-path=")) {
Petr Baudisb21c31c2005-12-23 01:27:40[diff] [blame]1036 base_path = arg+12;
1037 continue;
1038 }
Jens Axboe73a7a652007-07-27 21:00:29[diff] [blame]1039 if (!strcmp(arg, "--base-path-relaxed")) {
1040 base_path_relaxed = 1;
1041 continue;
1042 }
Junio C Hamanocc44c762007-02-20 09:53:29[diff] [blame]1043 if (!prefixcmp(arg, "--interpolated-path=")) {
Jon Loeliger49ba83f2006-09-20 01:31:51[diff] [blame]1044 interpolated_path = arg+20;
1045 continue;
1046 }
Mark Wooding1955fab2006-02-03 20:27:04[diff] [blame]1047 if (!strcmp(arg, "--reuseaddr")) {
1048 reuseaddr = 1;
1049 continue;
1050 }
Junio C Hamano603968d2006-02-05 06:27:29[diff] [blame]1051 if (!strcmp(arg, "--user-path")) {
1052 user_path = "";
1053 continue;
1054 }
Junio C Hamanocc44c762007-02-20 09:53:29[diff] [blame]1055 if (!prefixcmp(arg, "--user-path=")) {
Junio C Hamano603968d2006-02-05 06:27:29[diff] [blame]1056 user_path = arg + 12;
1057 continue;
1058 }
Junio C Hamanocc44c762007-02-20 09:53:29[diff] [blame]1059 if (!prefixcmp(arg, "--pid-file=")) {
Matthias Lederhofer45ed5d72006-07-13 10:18:08[diff] [blame]1060 pid_file = arg + 11;
1061 continue;
1062 }
Matthias Lederhofera5262762006-07-13 16:47:13[diff] [blame]1063 if (!strcmp(arg, "--detach")) {
1064 detach = 1;
1065 log_syslog = 1;
1066 continue;
1067 }
Junio C Hamanocc44c762007-02-20 09:53:29[diff] [blame]1068 if (!prefixcmp(arg, "--user=")) {
Tilman Sauerbeck678dac62006-08-22 17:37:41[diff] [blame]1069 user_name = arg + 7;
1070 continue;
1071 }
Junio C Hamanocc44c762007-02-20 09:53:29[diff] [blame]1072 if (!prefixcmp(arg, "--group=")) {
Tilman Sauerbeck678dac62006-08-22 17:37:41[diff] [blame]1073 group_name = arg + 8;
1074 continue;
1075 }
Junio C Hamanocc44c762007-02-20 09:53:29[diff] [blame]1076 if (!prefixcmp(arg, "--enable=")) {
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]1077 enable_service(arg + 9, 1);
1078 continue;
1079 }
Junio C Hamanocc44c762007-02-20 09:53:29[diff] [blame]1080 if (!prefixcmp(arg, "--disable=")) {
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]1081 enable_service(arg + 10, 0);
1082 continue;
1083 }
Junio C Hamanocc44c762007-02-20 09:53:29[diff] [blame]1084 if (!prefixcmp(arg, "--allow-override=")) {
Junio C Hamano74c0cc22006-08-21 02:03:50[diff] [blame]1085 make_service_overridable(arg + 17, 1);
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]1086 continue;
1087 }
Junio C Hamanocc44c762007-02-20 09:53:29[diff] [blame]1088 if (!prefixcmp(arg, "--forbid-override=")) {
Junio C Hamano74c0cc22006-08-21 02:03:50[diff] [blame]1089 make_service_overridable(arg + 18, 0);
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]1090 continue;
1091 }
H. Peter Anvin4ae95682005-09-27 02:10:55[diff] [blame]1092 if (!strcmp(arg, "--")) {
1093 ok_paths = &argv[i+1];
1094 break;
1095 } else if (arg[0] != '-') {
1096 ok_paths = &argv[i];
1097 break;
1098 }
Linus Torvaldse64e1b72005-07-15 16:32:16[diff] [blame]1099
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]1100 usage(daemon_usage);
1101 }
1102
Johannes Sixt22665bb2008-02-25 13:25:20[diff] [blame]1103 if (log_syslog) {
Stephen R. van den Berg6a992e92008-08-14 18:02:20[diff] [blame]1104 openlog("git-daemon", LOG_PID, LOG_DAEMON);
Johannes Sixt22665bb2008-02-25 13:25:20[diff] [blame]1105 set_die_routine(daemon_die);
Junio C Hamano460c2012008-08-24 20:27:10[diff] [blame]1106 } else
Junio C Hamano48196af2008-09-04 03:33:29[diff] [blame]1107 /* avoid splitting a message in the middle */
1108 setvbuf(stderr, NULL, _IOLBF, 0);
Johannes Sixt22665bb2008-02-25 13:25:20[diff] [blame]1109
Tilman Sauerbeck678dac62006-08-22 17:37:41[diff] [blame]1110 if (inetd_mode && (group_name || user_name))
1111 die("--user and --group are incompatible with --inetd");
1112
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]1113 if (inetd_mode && (listen_port || listen_addr))
1114 die("--listen= and --port= are incompatible with --inetd");
1115 else if (listen_port == 0)
1116 listen_port = DEFAULT_GIT_PORT;
1117
Tilman Sauerbeck678dac62006-08-22 17:37:41[diff] [blame]1118 if (group_name && !user_name)
1119 die("--group supplied without --user");
1120
1121 if (user_name) {
1122 pass = getpwnam(user_name);
1123 if (!pass)
1124 die("user not found - %s", user_name);
1125
1126 if (!group_name)
1127 gid = pass->pw_gid;
1128 else {
1129 group = getgrnam(group_name);
1130 if (!group)
1131 die("group not found - %s", group_name);
1132
1133 gid = group->gr_gid;
1134 }
1135 }
1136
Matthias Lederhoferad8b4f52006-07-13 10:02:29[diff] [blame]1137 if (strict_paths && (!ok_paths || !*ok_paths))
1138 die("option --strict-paths requires a whitelist");
1139
Junio C Hamano90b4a712008-09-09 08:27:07[diff] [blame]1140 if (base_path && !is_directory(base_path))
1141 die("base-path '%s' does not exist or is not a directory",
1142 base_path);
Johannes Sixt20632072008-02-26 12:00:55[diff] [blame]1143
lars.doelle@on-line.de7c3693f2005-09-08 01:50:01[diff] [blame]1144 if (inetd_mode) {
David Woodhouse5b276ee2006-06-20 14:38:13[diff] [blame]1145 struct sockaddr_storage ss;
1146 struct sockaddr *peer = (struct sockaddr *)&ss;
1147 socklen_t slen = sizeof(ss);
1148
René Scharfec569b1f2008-12-26 09:46:25[diff] [blame]1149 if (!freopen("/dev/null", "w", stderr))
Thomas Rastd824cbb2009-06-27 15:58:46[diff] [blame]1150 die_errno("failed to redirect stderr to /dev/null");
David Woodhouse5b276ee2006-06-20 14:38:13[diff] [blame]1151
1152 if (getpeername(0, peer, &slen))
1153 peer = NULL;
1154
1155 return execute(peer);
lars.doelle@on-line.de7c3693f2005-09-08 01:50:01[diff] [blame]1156 }
Andreas Ericssonbce82302005-11-14 16:41:01[diff] [blame]1157
Stephen R. van den Berg6a992e92008-08-14 18:02:20[diff] [blame]1158 if (detach) {
Matthias Lederhofera5262762006-07-13 16:47:13[diff] [blame]1159 daemonize();
Stephen R. van den Berg6a992e92008-08-14 18:02:20[diff] [blame]1160 loginfo("Ready to rumble");
1161 }
Matthias Lederhofera5262762006-07-13 16:47:13[diff] [blame]1162 else
1163 sanitize_stdfds();
Matthias Lederhofer258e93a2006-07-13 16:32:11[diff] [blame]1164
Matthias Lederhofer45ed5d72006-07-13 10:18:08[diff] [blame]1165 if (pid_file)
1166 store_pid(pid_file);
1167
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]1168 return serve(listen_addr, listen_port, pass, gid);
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]1169}