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chromium / external / github.com / git / git / refs/tags/v1.6.6.3 / . / daemon.c
blob: 5783e2401108adb1fef6943ef80bd78dbc76ecad [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
Tarmigan Casebolt28bea9e2009-11-14 21:33:13[diff] [blame]80__attribute__((format (printf, 1, 2)))
Pavel Roskincdda4742005-09-29 20:53:14[diff] [blame]81static void logerror(const char *err, ...)
Petr Baudisf8ff0c02005-09-22 09:25:28[diff] [blame]82{
83 va_list params;
84 va_start(params, err);
Petr Baudis9048fe12005-09-24 14:13:01[diff] [blame]85 logreport(LOG_ERR, err, params);
Petr Baudisf8ff0c02005-09-22 09:25:28[diff] [blame]86 va_end(params);
87}
88
Tarmigan Casebolt28bea9e2009-11-14 21:33:13[diff] [blame]89__attribute__((format (printf, 1, 2)))
Pavel Roskincdda4742005-09-29 20:53:14[diff] [blame]90static void loginfo(const char *err, ...)
Petr Baudisf8ff0c02005-09-22 09:25:28[diff] [blame]91{
92 va_list params;
93 if (!verbose)
94 return;
95 va_start(params, err);
Petr Baudis9048fe12005-09-24 14:13:01[diff] [blame]96 logreport(LOG_INFO, err, params);
Petr Baudisf8ff0c02005-09-22 09:25:28[diff] [blame]97 va_end(params);
98}
99
Matthias Lederhoferad8b4f52006-07-13 10:02:29[diff] [blame]100static void NORETURN daemon_die(const char *err, va_list params)
101{
102 logreport(LOG_ERR, err, params);
103 exit(1);
104}
105
René Scharfea47551c2008-11-22 23:21:52[diff] [blame]106static char *path_ok(char *directory)
H. Peter Anvin4ae95682005-09-27 02:10:55[diff] [blame]107{
Junio C Hamano603968d2006-02-05 06:27:29[diff] [blame]108 static char rpath[PATH_MAX];
Jon Loeliger49ba83f2006-09-20 01:31:51[diff] [blame]109 static char interp_path[PATH_MAX];
Junio C Hamanod79374c2005-12-03 09:45:57[diff] [blame]110 char *path;
Jon Loeliger49ba83f2006-09-20 01:31:51[diff] [blame]111 char *dir;
112
René Scharfe9d7ca662008-11-22 23:15:01[diff] [blame]113 dir = directory;
Junio C Hamanod79374c2005-12-03 09:45:57[diff] [blame]114
Shawn O. Pearce34b6cb82009-11-09 19:26:43[diff] [blame]115 if (daemon_avoid_alias(dir)) {
Junio C Hamanod79374c2005-12-03 09:45:57[diff] [blame]116 logerror("'%s': aliased", dir);
117 return NULL;
118 }
119
Junio C Hamano603968d2006-02-05 06:27:29[diff] [blame]120 if (*dir == '~') {
121 if (!user_path) {
122 logerror("'%s': User-path not allowed", dir);
123 return NULL;
124 }
125 if (*user_path) {
126 /* Got either "~alice" or "~alice/foo";
127 * rewrite them to "~alice/%s" or
128 * "~alice/%s/foo".
129 */
130 int namlen, restlen = strlen(dir);
131 char *slash = strchr(dir, '/');
132 if (!slash)
133 slash = dir + restlen;
134 namlen = slash - dir;
135 restlen -= namlen;
136 loginfo("userpath <%s>, request <%s>, namlen %d, restlen %d, slash <%s>", user_path, dir, namlen, restlen, slash);
137 snprintf(rpath, PATH_MAX, "%.*s/%s%.*s",
138 namlen, dir, user_path, restlen, slash);
139 dir = rpath;
140 }
141 }
Jon Loeliger49ba83f2006-09-20 01:31:51[diff] [blame]142 else if (interpolated_path && saw_extended_args) {
René Scharfe9d7ca662008-11-22 23:15:01[diff] [blame]143 struct strbuf expanded_path = STRBUF_INIT;
144 struct strbuf_expand_dict_entry dict[] = {
145 { "H", hostname },
146 { "CH", canon_hostname },
147 { "IP", ip_address },
148 { "P", tcp_port },
149 { "D", directory },
150 { "%", "%" },
151 { NULL }
152 };
153
Jon Loeliger49ba83f2006-09-20 01:31:51[diff] [blame]154 if (*dir != '/') {
155 /* Allow only absolute */
156 logerror("'%s': Non-absolute path denied (interpolated-path active)", dir);
157 return NULL;
158 }
159
René Scharfe9d7ca662008-11-22 23:15:01[diff] [blame]160 strbuf_expand(&expanded_path, interpolated_path,
161 strbuf_expand_dict_cb, &dict);
162 strlcpy(interp_path, expanded_path.buf, PATH_MAX);
163 strbuf_release(&expanded_path);
Jon Loeliger49ba83f2006-09-20 01:31:51[diff] [blame]164 loginfo("Interpolated dir '%s'", interp_path);
165
166 dir = interp_path;
167 }
Junio C Hamano603968d2006-02-05 06:27:29[diff] [blame]168 else if (base_path) {
169 if (*dir != '/') {
170 /* Allow only absolute */
Mark Wooding1fda3d52006-02-03 20:27:02[diff] [blame]171 logerror("'%s': Non-absolute path denied (base-path active)", dir);
Petr Baudisb21c31c2005-12-23 01:27:40[diff] [blame]172 return NULL;
173 }
Jon Loeliger49ba83f2006-09-20 01:31:51[diff] [blame]174 snprintf(rpath, PATH_MAX, "%s%s", base_path, dir);
175 dir = rpath;
Petr Baudisb21c31c2005-12-23 01:27:40[diff] [blame]176 }
177
René Scharfea5839712008-12-26 10:01:57[diff] [blame]178 path = enter_repo(dir, strict_paths);
179 if (!path && base_path && base_path_relaxed) {
Jens Axboe73a7a652007-07-27 21:00:29[diff] [blame]180 /*
181 * if we fail and base_path_relaxed is enabled, try without
182 * prefixing the base path
183 */
René Scharfea5839712008-12-26 10:01:57[diff] [blame]184 dir = directory;
185 path = enter_repo(dir, strict_paths);
186 }
H. Peter Anvin3e04c622005-10-19 01:26:52[diff] [blame]187
Andreas Ericsson4dbd1352005-11-17 19:37:14[diff] [blame]188 if (!path) {
Jeff King05ac6b32009-03-04 08:32:29[diff] [blame]189 logerror("'%s' does not appear to be a git repository", dir);
Andreas Ericsson4dbd1352005-11-17 19:37:14[diff] [blame]190 return NULL;
H. Peter Anvin4ae95682005-09-27 02:10:55[diff] [blame]191 }
192
193 if ( ok_paths && *ok_paths ) {
Junio C Hamanoce335fe2005-11-21 09:21:18[diff] [blame]194 char **pp;
Andreas Ericsson4dbd1352005-11-17 19:37:14[diff] [blame]195 int pathlen = strlen(path);
H. Peter Anvin4ae95682005-09-27 02:10:55[diff] [blame]196
Junio C Hamanoce335fe2005-11-21 09:21:18[diff] [blame]197 /* The validation is done on the paths after enter_repo
Junio C Hamanoa6080a02007-06-07 07:04:01[diff] [blame]198 * appends optional {.git,.git/.git} and friends, but
Junio C Hamanod79374c2005-12-03 09:45:57[diff] [blame]199 * it does not use getcwd(). So if your /pub is
200 * a symlink to /mnt/pub, you can whitelist /pub and
201 * do not have to say /mnt/pub.
202 * Do not say /pub/.
Junio C Hamanoce335fe2005-11-21 09:21:18[diff] [blame]203 */
H. Peter Anvin4ae95682005-09-27 02:10:55[diff] [blame]204 for ( pp = ok_paths ; *pp ; pp++ ) {
205 int len = strlen(*pp);
Junio C Hamanoce335fe2005-11-21 09:21:18[diff] [blame]206 if (len <= pathlen &&
207 !memcmp(*pp, path, len) &&
208 (path[len] == '\0' ||
209 (!strict_paths && path[len] == '/')))
210 return path;
H. Peter Anvin4ae95682005-09-27 02:10:55[diff] [blame]211 }
Andreas Ericsson4dbd1352005-11-17 19:37:14[diff] [blame]212 }
213 else {
214 /* be backwards compatible */
215 if (!strict_paths)
216 return path;
H. Peter Anvin4ae95682005-09-27 02:10:55[diff] [blame]217 }
218
Andreas Ericsson4dbd1352005-11-17 19:37:14[diff] [blame]219 logerror("'%s': not in whitelist", path);
220 return NULL; /* Fallthrough. Deny by default */
H. Peter Anvin4ae95682005-09-27 02:10:55[diff] [blame]221}
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]222
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]223typedef int (*daemon_service_fn)(void);
224struct daemon_service {
225 const char *name;
226 const char *config_name;
227 daemon_service_fn fn;
228 int enabled;
229 int overridable;
230};
H. Peter Anvin4ae95682005-09-27 02:10:55[diff] [blame]231
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]232static struct daemon_service *service_looking_at;
233static int service_enabled;
234
Johannes Schindelinef90d6d2008-05-14 17:46:53[diff] [blame]235static int git_daemon_config(const char *var, const char *value, void *cb)
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]236{
Junio C Hamanocc44c762007-02-20 09:53:29[diff] [blame]237 if (!prefixcmp(var, "daemon.") &&
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]238 !strcmp(var + 7, service_looking_at->config_name)) {
239 service_enabled = git_config_bool(var, value);
240 return 0;
241 }
242
243 /* we are not interested in parsing any other configuration here */
244 return 0;
245}
246
René Scharfea47551c2008-11-22 23:21:52[diff] [blame]247static int run_service(char *dir, struct daemon_service *service)
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]248{
249 const char *path;
250 int enabled = service->enabled;
251
René Scharfea47551c2008-11-22 23:21:52[diff] [blame]252 loginfo("Request %s for '%s'", service->name, dir);
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]253
254 if (!enabled && !service->overridable) {
255 logerror("'%s': service not enabled.", service->name);
256 errno = EACCES;
257 return -1;
258 }
Andreas Ericsson4dbd1352005-11-17 19:37:14[diff] [blame]259
René Scharfea47551c2008-11-22 23:21:52[diff] [blame]260 if (!(path = path_ok(dir)))
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]261 return -1;
H. Peter Anvin47888f02005-09-27 15:49:40[diff] [blame]262
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]263 /*
264 * Security on the cheap.
265 *
Junio C Hamanoa935c392005-10-21 06:19:36[diff] [blame]266 * We want a readable HEAD, usable "objects" directory, and
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]267 * a "git-daemon-export-ok" flag that says that the other side
268 * is ok with us doing this.
Andreas Ericsson4dbd1352005-11-17 19:37:14[diff] [blame]269 *
270 * path_ok() uses enter_repo() and does whitelist checking.
271 * We only need to make sure the repository is exported.
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]272 */
Andreas Ericsson4dbd1352005-11-17 19:37:14[diff] [blame]273
H. Peter Anvin3e04c622005-10-19 01:26:52[diff] [blame]274 if (!export_all_trees && access("git-daemon-export-ok", F_OK)) {
Andreas Ericsson4dbd1352005-11-17 19:37:14[diff] [blame]275 logerror("'%s': repository not exported.", path);
H. Peter Anvin3e04c622005-10-19 01:26:52[diff] [blame]276 errno = EACCES;
277 return -1;
278 }
279
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]280 if (service->overridable) {
281 service_looking_at = service;
282 service_enabled = -1;
Johannes Schindelinef90d6d2008-05-14 17:46:53[diff] [blame]283 git_config(git_daemon_config, NULL);
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]284 if (0 <= service_enabled)
285 enabled = service_enabled;
286 }
287 if (!enabled) {
288 logerror("'%s': service not enabled for '%s'",
289 service->name, path);
290 errno = EACCES;
291 return -1;
292 }
293
Linus Torvalds02d57da2005-07-16 05:53:31[diff] [blame]294 /*
295 * We'll ignore SIGTERM from now on, we have a
296 * good client.
297 */
298 signal(SIGTERM, SIG_IGN);
299
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]300 return service->fn();
301}
302
Johannes Sixt5d87dd42009-06-14 20:38:51[diff] [blame]303static void copy_to_log(int fd)
304{
305 struct strbuf line = STRBUF_INIT;
306 FILE *fp;
307
308 fp = fdopen(fd, "r");
309 if (fp == NULL) {
310 logerror("fdopen of error channel failed");
311 close(fd);
312 return;
313 }
314
315 while (strbuf_getline(&line, fp, '\n') != EOF) {
316 logerror("%s", line.buf);
317 strbuf_setlen(&line, 0);
318 }
319
320 strbuf_release(&line);
321 fclose(fp);
322}
323
324static int run_service_command(const char **argv)
325{
326 struct child_process cld;
327
328 memset(&cld, 0, sizeof(cld));
329 cld.argv = argv;
330 cld.git_cmd = 1;
331 cld.err = -1;
332 if (start_command(&cld))
333 return -1;
334
335 close(0);
336 close(1);
337
338 copy_to_log(cld.err);
339
340 return finish_command(&cld);
341}
342
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]343static int upload_pack(void)
344{
345 /* Timeout as string */
346 char timeout_buf[64];
Johannes Sixt5d87dd42009-06-14 20:38:51[diff] [blame]347 const char *argv[] = { "upload-pack", "--strict", timeout_buf, ".", NULL };
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]348
H. Peter Anvin960decc2005-10-19 21:27:01[diff] [blame]349 snprintf(timeout_buf, sizeof timeout_buf, "--timeout=%u", timeout);
Johannes Sixt5d87dd42009-06-14 20:38:51[diff] [blame]350 return run_service_command(argv);
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]351}
352
Franck Bui-Huu39345a22006-09-07 13:12:05[diff] [blame]353static int upload_archive(void)
354{
Johannes Sixt5d87dd42009-06-14 20:38:51[diff] [blame]355 static const char *argv[] = { "upload-archive", ".", NULL };
356 return run_service_command(argv);
Franck Bui-Huu39345a22006-09-07 13:12:05[diff] [blame]357}
358
Linus Torvalds4b3b1e12007-01-21 19:04:13[diff] [blame]359static int receive_pack(void)
360{
Johannes Sixt5d87dd42009-06-14 20:38:51[diff] [blame]361 static const char *argv[] = { "receive-pack", ".", NULL };
362 return run_service_command(argv);
Linus Torvalds4b3b1e12007-01-21 19:04:13[diff] [blame]363}
364
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]365static struct daemon_service daemon_service[] = {
Franck Bui-Huu39345a22006-09-07 13:12:05[diff] [blame]366 { "upload-archive", "uploadarch", upload_archive, 0, 1 },
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]367 { "upload-pack", "uploadpack", upload_pack, 1, 1 },
Linus Torvalds4b3b1e12007-01-21 19:04:13[diff] [blame]368 { "receive-pack", "receivepack", receive_pack, 0, 1 },
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]369};
370
Junio C Hamanof3fa1832007-11-08 23:35:32[diff] [blame]371static void enable_service(const char *name, int ena)
372{
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]373 int i;
374 for (i = 0; i < ARRAY_SIZE(daemon_service); i++) {
375 if (!strcmp(daemon_service[i].name, name)) {
376 daemon_service[i].enabled = ena;
377 return;
378 }
379 }
380 die("No such service %s", name);
381}
382
Junio C Hamanof3fa1832007-11-08 23:35:32[diff] [blame]383static void make_service_overridable(const char *name, int ena)
384{
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]385 int i;
386 for (i = 0; i < ARRAY_SIZE(daemon_service); i++) {
387 if (!strcmp(daemon_service[i].name, name)) {
388 daemon_service[i].overridable = ena;
389 return;
390 }
391 }
392 die("No such service %s", name);
393}
394
René Scharfe6720e952008-12-26 10:12:15[diff] [blame]395static char *xstrdup_tolower(const char *str)
396{
397 char *p, *dup = xstrdup(str);
398 for (p = dup; *p; p++)
399 *p = tolower(*p);
400 return dup;
401}
402
Jon Loeligereb30aed2006-09-27 16:16:10[diff] [blame]403/*
Shawn O. Pearce73bb33a2009-06-05 01:33:32[diff] [blame]404 * Read the host as supplied by the client connection.
Jon Loeligereb30aed2006-09-27 16:16:10[diff] [blame]405 */
Shawn O. Pearce73bb33a2009-06-05 01:33:32[diff] [blame]406static void parse_host_arg(char *extra_args, int buflen)
Jon Loeliger49ba83f2006-09-20 01:31:51[diff] [blame]407{
408 char *val;
409 int vallen;
410 char *end = extra_args + buflen;
411
Shawn O. Pearce73bb33a2009-06-05 01:33:32[diff] [blame]412 if (extra_args < end && *extra_args) {
Jon Loeliger49ba83f2006-09-20 01:31:51[diff] [blame]413 saw_extended_args = 1;
414 if (strncasecmp("host=", extra_args, 5) == 0) {
415 val = extra_args + 5;
416 vallen = strlen(val) + 1;
417 if (*val) {
Jon Loeligereb30aed2006-09-27 16:16:10[diff] [blame]418 /* Split <host>:<port> at colon. */
419 char *host = val;
420 char *port = strrchr(host, ':');
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]421 if (port) {
422 *port = 0;
423 port++;
René Scharfe9d7ca662008-11-22 23:15:01[diff] [blame]424 free(tcp_port);
425 tcp_port = xstrdup(port);
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]426 }
René Scharfe9d7ca662008-11-22 23:15:01[diff] [blame]427 free(hostname);
René Scharfe6720e952008-12-26 10:12:15[diff] [blame]428 hostname = xstrdup_tolower(host);
Jon Loeliger49ba83f2006-09-20 01:31:51[diff] [blame]429 }
Jon Loeligereb30aed2006-09-27 16:16:10[diff] [blame]430
Jon Loeliger49ba83f2006-09-20 01:31:51[diff] [blame]431 /* On to the next one */
432 extra_args = val + vallen;
433 }
Shawn O. Pearce73bb33a2009-06-05 01:33:32[diff] [blame]434 if (extra_args < end && *extra_args)
435 die("Invalid request");
Jon Loeliger49ba83f2006-09-20 01:31:51[diff] [blame]436 }
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]437
438 /*
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]439 * Locate canonical hostname and its IP address.
440 */
René Scharfe6720e952008-12-26 10:12:15[diff] [blame]441 if (hostname) {
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]442#ifndef NO_IPV6
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]443 struct addrinfo hints;
Benjamin Kramer3e8a00a2009-04-27 13:59:49[diff] [blame]444 struct addrinfo *ai;
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]445 int gai;
446 static char addrbuf[HOST_NAME_MAX + 1];
447
448 memset(&hints, 0, sizeof(hints));
449 hints.ai_flags = AI_CANONNAME;
450
Linus Torvalds2af202b2009-06-18 17:28:43[diff] [blame]451 gai = getaddrinfo(hostname, NULL, &hints, &ai);
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]452 if (!gai) {
Benjamin Kramer3e8a00a2009-04-27 13:59:49[diff] [blame]453 struct sockaddr_in *sin_addr = (void *)ai->ai_addr;
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]454
Benjamin Kramer3e8a00a2009-04-27 13:59:49[diff] [blame]455 inet_ntop(AF_INET, &sin_addr->sin_addr,
456 addrbuf, sizeof(addrbuf));
457 free(ip_address);
458 ip_address = xstrdup(addrbuf);
459
460 free(canon_hostname);
461 canon_hostname = xstrdup(ai->ai_canonname ?
462 ai->ai_canonname : ip_address);
463
464 freeaddrinfo(ai);
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]465 }
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]466#else
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]467 struct hostent *hent;
468 struct sockaddr_in sa;
469 char **ap;
470 static char addrbuf[HOST_NAME_MAX + 1];
471
René Scharfe9d7ca662008-11-22 23:15:01[diff] [blame]472 hent = gethostbyname(hostname);
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]473
474 ap = hent->h_addr_list;
475 memset(&sa, 0, sizeof sa);
476 sa.sin_family = hent->h_addrtype;
477 sa.sin_port = htons(0);
478 memcpy(&sa.sin_addr, *ap, hent->h_length);
479
480 inet_ntop(hent->h_addrtype, &sa.sin_addr,
481 addrbuf, sizeof(addrbuf));
Jon Loeligereb30aed2006-09-27 16:16:10[diff] [blame]482
René Scharfe9d7ca662008-11-22 23:15:01[diff] [blame]483 free(canon_hostname);
484 canon_hostname = xstrdup(hent->h_name);
485 free(ip_address);
486 ip_address = xstrdup(addrbuf);
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]487#endif
René Scharfe6720e952008-12-26 10:12:15[diff] [blame]488 }
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]489}
490
491
David Woodhouse5b276ee2006-06-20 14:38:13[diff] [blame]492static int execute(struct sockaddr *addr)
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]493{
Linus Torvalds7d806942005-07-15 16:27:05[diff] [blame]494 static char line[1000];
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]495 int pktlen, len, i;
Linus Torvalds7d806942005-07-15 16:27:05[diff] [blame]496
David Woodhouse5b276ee2006-06-20 14:38:13[diff] [blame]497 if (addr) {
498 char addrbuf[256] = "";
499 int port = -1;
500
501 if (addr->sa_family == AF_INET) {
502 struct sockaddr_in *sin_addr = (void *) addr;
503 inet_ntop(addr->sa_family, &sin_addr->sin_addr, addrbuf, sizeof(addrbuf));
Gerrit Papec67359b2007-11-05 09:16:22[diff] [blame]504 port = ntohs(sin_addr->sin_port);
David Woodhouse5b276ee2006-06-20 14:38:13[diff] [blame]505#ifndef NO_IPV6
506 } else if (addr && addr->sa_family == AF_INET6) {
507 struct sockaddr_in6 *sin6_addr = (void *) addr;
508
509 char *buf = addrbuf;
510 *buf++ = '['; *buf = '\0'; /* stpcpy() is cool */
511 inet_ntop(AF_INET6, &sin6_addr->sin6_addr, buf, sizeof(addrbuf) - 1);
512 strcat(buf, "]");
513
Gerrit Papec67359b2007-11-05 09:16:22[diff] [blame]514 port = ntohs(sin6_addr->sin6_port);
David Woodhouse5b276ee2006-06-20 14:38:13[diff] [blame]515#endif
516 }
517 loginfo("Connection from %s:%d", addrbuf, port);
Joey Hess53ffb872008-10-24 05:48:50[diff] [blame]518 setenv("REMOTE_ADDR", addrbuf, 1);
519 }
520 else {
521 unsetenv("REMOTE_ADDR");
David Woodhouse5b276ee2006-06-20 14:38:13[diff] [blame]522 }
523
H. Peter Anvin960decc2005-10-19 21:27:01[diff] [blame]524 alarm(init_timeout ? init_timeout : timeout);
Jon Loeliger5ad312b2006-06-07 03:58:41[diff] [blame]525 pktlen = packet_read_line(0, line, sizeof(line));
H. Peter Anvin960decc2005-10-19 21:27:01[diff] [blame]526 alarm(0);
Linus Torvalds7d806942005-07-15 16:27:05[diff] [blame]527
Jon Loeliger5ad312b2006-06-07 03:58:41[diff] [blame]528 len = strlen(line);
529 if (pktlen != len)
530 loginfo("Extended attributes (%d bytes) exist <%.*s>",
531 (int) pktlen - len,
532 (int) pktlen - len, line + len + 1);
Junio C Hamano83543a22006-10-24 01:26:05[diff] [blame]533 if (len && line[len-1] == '\n') {
Linus Torvalds7d806942005-07-15 16:27:05[diff] [blame]534 line[--len] = 0;
Junio C Hamano83543a22006-10-24 01:26:05[diff] [blame]535 pktlen--;
536 }
Linus Torvalds7d806942005-07-15 16:27:05[diff] [blame]537
René Scharfe9d7ca662008-11-22 23:15:01[diff] [blame]538 free(hostname);
539 free(canon_hostname);
540 free(ip_address);
541 free(tcp_port);
René Scharfea47551c2008-11-22 23:21:52[diff] [blame]542 hostname = canon_hostname = ip_address = tcp_port = NULL;
Jon Loeligereb30aed2006-09-27 16:16:10[diff] [blame]543
René Scharfed433ed02008-11-22 23:19:09[diff] [blame]544 if (len != pktlen)
Shawn O. Pearce73bb33a2009-06-05 01:33:32[diff] [blame]545 parse_host_arg(line + len + 1, pktlen - len - 1);
Jon Loeliger49ba83f2006-09-20 01:31:51[diff] [blame]546
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]547 for (i = 0; i < ARRAY_SIZE(daemon_service); i++) {
548 struct daemon_service *s = &(daemon_service[i]);
549 int namelen = strlen(s->name);
Junio C Hamano599065a2007-02-20 09:54:00[diff] [blame]550 if (!prefixcmp(line, "git-") &&
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]551 !strncmp(s->name, line + 4, namelen) &&
Jon Loeliger49ba83f2006-09-20 01:31:51[diff] [blame]552 line[namelen + 4] == ' ') {
Jon Loeligereb30aed2006-09-27 16:16:10[diff] [blame]553 /*
554 * Note: The directory here is probably context sensitive,
555 * and might depend on the actual service being performed.
556 */
René Scharfea47551c2008-11-22 23:21:52[diff] [blame]557 return run_service(line + namelen + 5, s);
Jon Loeliger49ba83f2006-09-20 01:31:51[diff] [blame]558 }
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]559 }
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]560
Petr Baudisf8ff0c02005-09-22 09:25:28[diff] [blame]561 logerror("Protocol error: '%s'", line);
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]562 return -1;
563}
564
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]565static int max_connections = 32;
Linus Torvalds66e631d2005-07-16 04:51:57[diff] [blame]566
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]567static unsigned int live_children;
Linus Torvalds66e631d2005-07-16 04:51:57[diff] [blame]568
Linus Torvalds4d8fa912005-08-01 19:11:53[diff] [blame]569static struct child {
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]570 struct child *next;
Linus Torvalds66e631d2005-07-16 04:51:57[diff] [blame]571 pid_t pid;
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]572 struct sockaddr_storage address;
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]573} *firstborn;
Linus Torvalds66e631d2005-07-16 04:51:57[diff] [blame]574
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]575static void add_child(pid_t pid, struct sockaddr *addr, int addrlen)
Linus Torvalds66e631d2005-07-16 04:51:57[diff] [blame]576{
Junio C Hamano460c2012008-08-24 20:27:10[diff] [blame]577 struct child *newborn, **cradle;
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]578
Junio C Hamano460c2012008-08-24 20:27:10[diff] [blame]579 /*
580 * This must be xcalloc() -- we'll compare the whole sockaddr_storage
581 * but individual address may be shorter.
582 */
583 newborn = xcalloc(1, sizeof(*newborn));
584 live_children++;
585 newborn->pid = pid;
586 memcpy(&newborn->address, addr, addrlen);
587 for (cradle = &firstborn; *cradle; cradle = &(*cradle)->next)
588 if (!memcmp(&(*cradle)->address, &newborn->address,
589 sizeof(newborn->address)))
590 break;
591 newborn->next = *cradle;
592 *cradle = newborn;
Linus Torvalds66e631d2005-07-16 04:51:57[diff] [blame]593}
594
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]595static void remove_child(pid_t pid)
Linus Torvalds66e631d2005-07-16 04:51:57[diff] [blame]596{
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]597 struct child **cradle, *blanket;
Linus Torvalds66e631d2005-07-16 04:51:57[diff] [blame]598
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]599 for (cradle = &firstborn; (blanket = *cradle); cradle = &blanket->next)
600 if (blanket->pid == pid) {
601 *cradle = blanket->next;
602 live_children--;
603 free(blanket);
604 break;
605 }
Linus Torvalds66e631d2005-07-16 04:51:57[diff] [blame]606}
607
608/*
609 * This gets called if the number of connections grows
610 * past "max_connections".
611 *
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]612 * We kill the newest connection from a duplicate IP.
Linus Torvalds66e631d2005-07-16 04:51:57[diff] [blame]613 */
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]614static void kill_some_child(void)
Linus Torvalds66e631d2005-07-16 04:51:57[diff] [blame]615{
Junio C Hamano460c2012008-08-24 20:27:10[diff] [blame]616 const struct child *blanket, *next;
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]617
Junio C Hamano460c2012008-08-24 20:27:10[diff] [blame]618 if (!(blanket = firstborn))
619 return;
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]620
Junio C Hamano460c2012008-08-24 20:27:10[diff] [blame]621 for (; (next = blanket->next); blanket = next)
622 if (!memcmp(&blanket->address, &next->address,
623 sizeof(next->address))) {
624 kill(blanket->pid, SIGTERM);
625 break;
626 }
Linus Torvalds66e631d2005-07-16 04:51:57[diff] [blame]627}
628
Johannes Schindelina5a91262008-07-03 15:27:24[diff] [blame]629static void check_dead_children(void)
630{
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]631 int status;
632 pid_t pid;
Johannes Schindelina5a91262008-07-03 15:27:24[diff] [blame]633
Junio C Hamano460c2012008-08-24 20:27:10[diff] [blame]634 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]635 const char *dead = "";
636 remove_child(pid);
Junio C Hamano460c2012008-08-24 20:27:10[diff] [blame]637 if (!WIFEXITED(status) || (WEXITSTATUS(status) > 0))
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]638 dead = " (with error)";
David Soria Parra85e72832008-08-31 12:09:39[diff] [blame]639 loginfo("[%"PRIuMAX"] Disconnected%s", (uintmax_t)pid, dead);
Linus Torvalds02d57da2005-07-16 05:53:31[diff] [blame]640 }
641}
642
Junio C Hamano7fa09082005-09-11 20:58:41[diff] [blame]643static void handle(int incoming, struct sockaddr *addr, int addrlen)
Linus Torvalds02d57da2005-07-16 05:53:31[diff] [blame]644{
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]645 pid_t pid;
Linus Torvalds02d57da2005-07-16 05:53:31[diff] [blame]646
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]647 if (max_connections && live_children >= max_connections) {
648 kill_some_child();
Junio C Hamano460c2012008-08-24 20:27:10[diff] [blame]649 sleep(1); /* give it some time to die */
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]650 check_dead_children();
651 if (live_children >= max_connections) {
652 close(incoming);
653 logerror("Too many children, dropping connection");
Linus Torvalds02d57da2005-07-16 05:53:31[diff] [blame]654 return;
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]655 }
656 }
Linus Torvalds02d57da2005-07-16 05:53:31[diff] [blame]657
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]658 if ((pid = fork())) {
659 close(incoming);
660 if (pid < 0) {
661 logerror("Couldn't fork %s", strerror(errno));
662 return;
663 }
Linus Torvalds02d57da2005-07-16 05:53:31[diff] [blame]664
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]665 add_child(pid, addr, addrlen);
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]666 return;
667 }
668
669 dup2(incoming, 0);
670 dup2(incoming, 1);
671 close(incoming);
Petr Baudisf8ff0c02005-09-22 09:25:28[diff] [blame]672
David Woodhouse5b276ee2006-06-20 14:38:13[diff] [blame]673 exit(execute(addr));
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]674}
675
Linus Torvaldseaa94912005-07-16 03:42:28[diff] [blame]676static void child_handler(int signo)
677{
Junio C Hamano460c2012008-08-24 20:27:10[diff] [blame]678 /*
679 * Otherwise empty handler because systemcalls will get interrupted
Stephen R. van den Berg695605b2008-08-14 18:02:20[diff] [blame]680 * upon signal receipt
681 * SysV needs the handler to be rearmed
682 */
Stephen R. van den Bergbd7b3712008-08-12 19:36:13[diff] [blame]683 signal(SIGCHLD, child_handler);
Linus Torvaldseaa94912005-07-16 03:42:28[diff] [blame]684}
685
Mark Wooding1955fab2006-02-03 20:27:04[diff] [blame]686static int set_reuse_addr(int sockfd)
687{
688 int on = 1;
689
690 if (!reuseaddr)
691 return 0;
692 return setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR,
693 &on, sizeof(on));
694}
695
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]696#ifndef NO_IPV6
697
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]698static int socksetup(char *listen_addr, int listen_port, int **socklist_p)
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]699{
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]700 int socknum = 0, *socklist = NULL;
701 int maxfd = -1;
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]702 char pbuf[NI_MAXSERV];
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]703 struct addrinfo hints, *ai0, *ai;
704 int gai;
Alexandre Julliard20276882007-02-14 17:10:26[diff] [blame]705 long flags;
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]706
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]707 sprintf(pbuf, "%d", listen_port);
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]708 memset(&hints, 0, sizeof(hints));
709 hints.ai_family = AF_UNSPEC;
710 hints.ai_socktype = SOCK_STREAM;
711 hints.ai_protocol = IPPROTO_TCP;
712 hints.ai_flags = AI_PASSIVE;
713
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]714 gai = getaddrinfo(listen_addr, pbuf, &hints, &ai0);
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]715 if (gai)
Alexander Potashevd7530702009-01-04 18:38:41[diff] [blame]716 die("getaddrinfo() failed: %s", gai_strerror(gai));
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]717
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]718 for (ai = ai0; ai; ai = ai->ai_next) {
719 int sockfd;
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]720
721 sockfd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
722 if (sockfd < 0)
723 continue;
724 if (sockfd >= FD_SETSIZE) {
Stephen R. van den Bergdf0daf82008-08-14 18:02:20[diff] [blame]725 logerror("Socket descriptor too large");
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]726 close(sockfd);
727 continue;
728 }
729
730#ifdef IPV6_V6ONLY
731 if (ai->ai_family == AF_INET6) {
732 int on = 1;
733 setsockopt(sockfd, IPPROTO_IPV6, IPV6_V6ONLY,
734 &on, sizeof(on));
735 /* Note: error is not fatal */
736 }
737#endif
738
Mark Wooding1955fab2006-02-03 20:27:04[diff] [blame]739 if (set_reuse_addr(sockfd)) {
740 close(sockfd);
Serge E. Hallyn0032d542006-04-18 13:11:06[diff] [blame]741 continue;
Mark Wooding1955fab2006-02-03 20:27:04[diff] [blame]742 }
743
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]744 if (bind(sockfd, ai->ai_addr, ai->ai_addrlen) < 0) {
745 close(sockfd);
746 continue; /* not fatal */
747 }
748 if (listen(sockfd, 5) < 0) {
749 close(sockfd);
750 continue; /* not fatal */
751 }
752
Alexandre Julliard20276882007-02-14 17:10:26[diff] [blame]753 flags = fcntl(sockfd, F_GETFD, 0);
754 if (flags >= 0)
755 fcntl(sockfd, F_SETFD, flags | FD_CLOEXEC);
756
Jonas Fonseca83572c12006-08-26 14:16:18[diff] [blame]757 socklist = xrealloc(socklist, sizeof(int) * (socknum + 1));
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]758 socklist[socknum++] = sockfd;
759
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]760 if (maxfd < sockfd)
761 maxfd = sockfd;
762 }
763
764 freeaddrinfo(ai0);
765
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]766 *socklist_p = socklist;
767 return socknum;
768}
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]769
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]770#else /* NO_IPV6 */
771
Alex Riesen100690b2006-09-28 18:48:14[diff] [blame]772static int socksetup(char *listen_addr, int listen_port, int **socklist_p)
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]773{
774 struct sockaddr_in sin;
775 int sockfd;
Alexandre Julliard20276882007-02-14 17:10:26[diff] [blame]776 long flags;
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]777
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]778 memset(&sin, 0, sizeof sin);
779 sin.sin_family = AF_INET;
780 sin.sin_port = htons(listen_port);
781
782 if (listen_addr) {
783 /* Well, host better be an IP address here. */
784 if (inet_pton(AF_INET, listen_addr, &sin.sin_addr.s_addr) <= 0)
785 return 0;
786 } else {
787 sin.sin_addr.s_addr = htonl(INADDR_ANY);
788 }
789
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]790 sockfd = socket(AF_INET, SOCK_STREAM, 0);
791 if (sockfd < 0)
792 return 0;
793
Mark Wooding1955fab2006-02-03 20:27:04[diff] [blame]794 if (set_reuse_addr(sockfd)) {
795 close(sockfd);
796 return 0;
797 }
798
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]799 if ( bind(sockfd, (struct sockaddr *)&sin, sizeof sin) < 0 ) {
800 close(sockfd);
801 return 0;
802 }
803
Paul Sericef35230f2005-11-21 17:07:23[diff] [blame]804 if (listen(sockfd, 5) < 0) {
805 close(sockfd);
806 return 0;
807 }
808
Alexandre Julliard20276882007-02-14 17:10:26[diff] [blame]809 flags = fcntl(sockfd, F_GETFD, 0);
810 if (flags >= 0)
811 fcntl(sockfd, F_SETFD, flags | FD_CLOEXEC);
812
H. Peter Anvin1b4713f2005-09-30 17:47:50[diff] [blame]813 *socklist_p = xmalloc(sizeof(int));
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]814 **socklist_p = sockfd;
Paul Sericef35230f2005-11-21 17:07:23[diff] [blame]815 return 1;
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]816}
817
818#endif
819
820static int service_loop(int socknum, int *socklist)
821{
822 struct pollfd *pfd;
823 int i;
824
Stephen R. van den Berg695605b2008-08-14 18:02:20[diff] [blame]825 pfd = xcalloc(socknum, sizeof(struct pollfd));
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]826
827 for (i = 0; i < socknum; i++) {
828 pfd[i].fd = socklist[i];
829 pfd[i].events = POLLIN;
830 }
H. Peter Anvin92202822005-09-30 18:01:57[diff] [blame]831
832 signal(SIGCHLD, child_handler);
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]833
834 for (;;) {
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]835 int i;
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]836
Stephen R. van den Berg695605b2008-08-14 18:02:20[diff] [blame]837 check_dead_children();
838
839 if (poll(pfd, socknum, -1) < 0) {
Junio C Hamano1eef0b32005-07-26 20:26:52[diff] [blame]840 if (errno != EINTR) {
Stephen R. van den Bergdf0daf82008-08-14 18:02:20[diff] [blame]841 logerror("Poll failed, resuming: %s",
Junio C Hamano1eef0b32005-07-26 20:26:52[diff] [blame]842 strerror(errno));
843 sleep(1);
844 }
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]845 continue;
846 }
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]847
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]848 for (i = 0; i < socknum; i++) {
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]849 if (pfd[i].revents & POLLIN) {
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]850 struct sockaddr_storage ss;
H. Peter Anvin7626e492005-09-30 17:48:21[diff] [blame]851 unsigned int sslen = sizeof(ss);
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]852 int incoming = accept(pfd[i].fd, (struct sockaddr *)&ss, &sslen);
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]853 if (incoming < 0) {
854 switch (errno) {
855 case EAGAIN:
856 case EINTR:
857 case ECONNABORTED:
858 continue;
859 default:
Thomas Rastd824cbb2009-06-27 15:58:46[diff] [blame]860 die_errno("accept returned");
YOSHIFUJI Hideakidf076bd2005-07-23 08:24:59[diff] [blame]861 }
862 }
863 handle(incoming, (struct sockaddr *)&ss, sslen);
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]864 }
865 }
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]866 }
867}
868
Matthias Lederhofer258e93a2006-07-13 16:32:11[diff] [blame]869/* if any standard file descriptor is missing open it to /dev/null */
870static void sanitize_stdfds(void)
871{
872 int fd = open("/dev/null", O_RDWR, 0);
873 while (fd != -1 && fd < 2)
874 fd = dup(fd);
875 if (fd == -1)
Thomas Rastd824cbb2009-06-27 15:58:46[diff] [blame]876 die_errno("open /dev/null or dup failed");
Matthias Lederhofer258e93a2006-07-13 16:32:11[diff] [blame]877 if (fd > 2)
878 close(fd);
879}
880
Matthias Lederhofera5262762006-07-13 16:47:13[diff] [blame]881static void daemonize(void)
882{
883 switch (fork()) {
884 case 0:
885 break;
886 case -1:
Thomas Rastd824cbb2009-06-27 15:58:46[diff] [blame]887 die_errno("fork failed");
Matthias Lederhofera5262762006-07-13 16:47:13[diff] [blame]888 default:
889 exit(0);
890 }
891 if (setsid() == -1)
Thomas Rastd824cbb2009-06-27 15:58:46[diff] [blame]892 die_errno("setsid failed");
Matthias Lederhofera5262762006-07-13 16:47:13[diff] [blame]893 close(0);
894 close(1);
895 close(2);
896 sanitize_stdfds();
897}
898
Matthias Lederhofer45ed5d72006-07-13 10:18:08[diff] [blame]899static void store_pid(const char *path)
900{
901 FILE *f = fopen(path, "w");
902 if (!f)
Thomas Rastd824cbb2009-06-27 15:58:46[diff] [blame]903 die_errno("cannot open pid file '%s'", path);
David Soria Parra85e72832008-08-31 12:09:39[diff] [blame]904 if (fprintf(f, "%"PRIuMAX"\n", (uintmax_t) getpid()) < 0 || fclose(f) != 0)
Thomas Rastd824cbb2009-06-27 15:58:46[diff] [blame]905 die_errno("failed to write pid file '%s'", path);
Matthias Lederhofer45ed5d72006-07-13 10:18:08[diff] [blame]906}
907
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]908static int serve(char *listen_addr, int listen_port, struct passwd *pass, gid_t gid)
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]909{
910 int socknum, *socklist;
Junio C Hamano4ae22d92005-10-21 06:21:50[diff] [blame]911
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]912 socknum = socksetup(listen_addr, listen_port, &socklist);
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]913 if (socknum == 0)
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]914 die("unable to allocate any listen sockets on host %s port %u",
915 listen_addr, listen_port);
Junio C Hamano4ae22d92005-10-21 06:21:50[diff] [blame]916
Tilman Sauerbeck678dac62006-08-22 17:37:41[diff] [blame]917 if (pass && gid &&
918 (initgroups(pass->pw_name, gid) || setgid (gid) ||
919 setuid(pass->pw_uid)))
920 die("cannot drop privileges");
921
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]922 return service_loop(socknum, socklist);
Junio C Hamano4ae22d92005-10-21 06:21:50[diff] [blame]923}
Peter Anvin6573faf2005-09-29 00:26:44[diff] [blame]924
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]925int main(int argc, char **argv)
926{
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]927 int listen_port = 0;
928 char *listen_addr = NULL;
Linus Torvaldse64e1b72005-07-15 16:32:16[diff] [blame]929 int inetd_mode = 0;
Tilman Sauerbeck678dac62006-08-22 17:37:41[diff] [blame]930 const char *pid_file = NULL, *user_name = NULL, *group_name = NULL;
Matthias Lederhofera5262762006-07-13 16:47:13[diff] [blame]931 int detach = 0;
Tilman Sauerbeck678dac62006-08-22 17:37:41[diff] [blame]932 struct passwd *pass = NULL;
933 struct group *group;
934 gid_t gid = 0;
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]935 int i;
936
Steffen Prohaska2fb3f6d2009-01-18 12:00:12[diff] [blame]937 git_extract_argv0_path(argv[0]);
938
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]939 for (i = 1; i < argc; i++) {
940 char *arg = argv[i];
941
Junio C Hamanocc44c762007-02-20 09:53:29[diff] [blame]942 if (!prefixcmp(arg, "--listen=")) {
René Scharfe6720e952008-12-26 10:12:15[diff] [blame]943 listen_addr = xstrdup_tolower(arg + 9);
944 continue;
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]945 }
Junio C Hamanocc44c762007-02-20 09:53:29[diff] [blame]946 if (!prefixcmp(arg, "--port=")) {
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]947 char *end;
948 unsigned long n;
949 n = strtoul(arg+7, &end, 0);
950 if (arg[7] && !*end) {
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]951 listen_port = n;
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]952 continue;
953 }
954 }
Linus Torvaldse64e1b72005-07-15 16:32:16[diff] [blame]955 if (!strcmp(arg, "--inetd")) {
956 inetd_mode = 1;
Andreas Ericssona8883282005-11-16 23:38:29[diff] [blame]957 log_syslog = 1;
Linus Torvaldse64e1b72005-07-15 16:32:16[diff] [blame]958 continue;
959 }
Petr Baudisf8ff0c02005-09-22 09:25:28[diff] [blame]960 if (!strcmp(arg, "--verbose")) {
961 verbose = 1;
962 continue;
963 }
Petr Baudis9048fe12005-09-24 14:13:01[diff] [blame]964 if (!strcmp(arg, "--syslog")) {
965 log_syslog = 1;
Petr Baudis9048fe12005-09-24 14:13:01[diff] [blame]966 continue;
967 }
H. Peter Anvin4ae95682005-09-27 02:10:55[diff] [blame]968 if (!strcmp(arg, "--export-all")) {
969 export_all_trees = 1;
970 continue;
971 }
Junio C Hamanocc44c762007-02-20 09:53:29[diff] [blame]972 if (!prefixcmp(arg, "--timeout=")) {
H. Peter Anvin960decc2005-10-19 21:27:01[diff] [blame]973 timeout = atoi(arg+10);
Andreas Ericssona8883282005-11-16 23:38:29[diff] [blame]974 continue;
H. Peter Anvin960decc2005-10-19 21:27:01[diff] [blame]975 }
Junio C Hamanocc44c762007-02-20 09:53:29[diff] [blame]976 if (!prefixcmp(arg, "--init-timeout=")) {
H. Peter Anvin960decc2005-10-19 21:27:01[diff] [blame]977 init_timeout = atoi(arg+15);
Andreas Ericssona8883282005-11-16 23:38:29[diff] [blame]978 continue;
H. Peter Anvin960decc2005-10-19 21:27:01[diff] [blame]979 }
Stephen R. van den Berg3bd62c22008-08-14 18:02:20[diff] [blame]980 if (!prefixcmp(arg, "--max-connections=")) {
981 max_connections = atoi(arg+18);
982 if (max_connections < 0)
983 max_connections = 0; /* unlimited */
984 continue;
985 }
Andreas Ericsson4dbd1352005-11-17 19:37:14[diff] [blame]986 if (!strcmp(arg, "--strict-paths")) {
987 strict_paths = 1;
988 continue;
989 }
Junio C Hamanocc44c762007-02-20 09:53:29[diff] [blame]990 if (!prefixcmp(arg, "--base-path=")) {
Petr Baudisb21c31c2005-12-23 01:27:40[diff] [blame]991 base_path = arg+12;
992 continue;
993 }
Jens Axboe73a7a652007-07-27 21:00:29[diff] [blame]994 if (!strcmp(arg, "--base-path-relaxed")) {
995 base_path_relaxed = 1;
996 continue;
997 }
Junio C Hamanocc44c762007-02-20 09:53:29[diff] [blame]998 if (!prefixcmp(arg, "--interpolated-path=")) {
Jon Loeliger49ba83f2006-09-20 01:31:51[diff] [blame]999 interpolated_path = arg+20;
1000 continue;
1001 }
Mark Wooding1955fab2006-02-03 20:27:04[diff] [blame]1002 if (!strcmp(arg, "--reuseaddr")) {
1003 reuseaddr = 1;
1004 continue;
1005 }
Junio C Hamano603968d2006-02-05 06:27:29[diff] [blame]1006 if (!strcmp(arg, "--user-path")) {
1007 user_path = "";
1008 continue;
1009 }
Junio C Hamanocc44c762007-02-20 09:53:29[diff] [blame]1010 if (!prefixcmp(arg, "--user-path=")) {
Junio C Hamano603968d2006-02-05 06:27:29[diff] [blame]1011 user_path = arg + 12;
1012 continue;
1013 }
Junio C Hamanocc44c762007-02-20 09:53:29[diff] [blame]1014 if (!prefixcmp(arg, "--pid-file=")) {
Matthias Lederhofer45ed5d72006-07-13 10:18:08[diff] [blame]1015 pid_file = arg + 11;
1016 continue;
1017 }
Matthias Lederhofera5262762006-07-13 16:47:13[diff] [blame]1018 if (!strcmp(arg, "--detach")) {
1019 detach = 1;
1020 log_syslog = 1;
1021 continue;
1022 }
Junio C Hamanocc44c762007-02-20 09:53:29[diff] [blame]1023 if (!prefixcmp(arg, "--user=")) {
Tilman Sauerbeck678dac62006-08-22 17:37:41[diff] [blame]1024 user_name = arg + 7;
1025 continue;
1026 }
Junio C Hamanocc44c762007-02-20 09:53:29[diff] [blame]1027 if (!prefixcmp(arg, "--group=")) {
Tilman Sauerbeck678dac62006-08-22 17:37:41[diff] [blame]1028 group_name = arg + 8;
1029 continue;
1030 }
Junio C Hamanocc44c762007-02-20 09:53:29[diff] [blame]1031 if (!prefixcmp(arg, "--enable=")) {
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]1032 enable_service(arg + 9, 1);
1033 continue;
1034 }
Junio C Hamanocc44c762007-02-20 09:53:29[diff] [blame]1035 if (!prefixcmp(arg, "--disable=")) {
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]1036 enable_service(arg + 10, 0);
1037 continue;
1038 }
Junio C Hamanocc44c762007-02-20 09:53:29[diff] [blame]1039 if (!prefixcmp(arg, "--allow-override=")) {
Junio C Hamano74c0cc22006-08-21 02:03:50[diff] [blame]1040 make_service_overridable(arg + 17, 1);
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]1041 continue;
1042 }
Junio C Hamanocc44c762007-02-20 09:53:29[diff] [blame]1043 if (!prefixcmp(arg, "--forbid-override=")) {
Junio C Hamano74c0cc22006-08-21 02:03:50[diff] [blame]1044 make_service_overridable(arg + 18, 0);
Junio C Hamanod819e4e2006-08-21 02:03:13[diff] [blame]1045 continue;
1046 }
H. Peter Anvin4ae95682005-09-27 02:10:55[diff] [blame]1047 if (!strcmp(arg, "--")) {
1048 ok_paths = &argv[i+1];
1049 break;
1050 } else if (arg[0] != '-') {
1051 ok_paths = &argv[i];
1052 break;
1053 }
Linus Torvaldse64e1b72005-07-15 16:32:16[diff] [blame]1054
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]1055 usage(daemon_usage);
1056 }
1057
Johannes Sixt22665bb2008-02-25 13:25:20[diff] [blame]1058 if (log_syslog) {
Stephen R. van den Berg6a992e92008-08-14 18:02:20[diff] [blame]1059 openlog("git-daemon", LOG_PID, LOG_DAEMON);
Johannes Sixt22665bb2008-02-25 13:25:20[diff] [blame]1060 set_die_routine(daemon_die);
Junio C Hamano460c2012008-08-24 20:27:10[diff] [blame]1061 } else
Junio C Hamano48196af2008-09-04 03:33:29[diff] [blame]1062 /* avoid splitting a message in the middle */
1063 setvbuf(stderr, NULL, _IOLBF, 0);
Johannes Sixt22665bb2008-02-25 13:25:20[diff] [blame]1064
Tilman Sauerbeck678dac62006-08-22 17:37:41[diff] [blame]1065 if (inetd_mode && (group_name || user_name))
1066 die("--user and --group are incompatible with --inetd");
1067
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]1068 if (inetd_mode && (listen_port || listen_addr))
1069 die("--listen= and --port= are incompatible with --inetd");
1070 else if (listen_port == 0)
1071 listen_port = DEFAULT_GIT_PORT;
1072
Tilman Sauerbeck678dac62006-08-22 17:37:41[diff] [blame]1073 if (group_name && !user_name)
1074 die("--group supplied without --user");
1075
1076 if (user_name) {
1077 pass = getpwnam(user_name);
1078 if (!pass)
1079 die("user not found - %s", user_name);
1080
1081 if (!group_name)
1082 gid = pass->pw_gid;
1083 else {
1084 group = getgrnam(group_name);
1085 if (!group)
1086 die("group not found - %s", group_name);
1087
1088 gid = group->gr_gid;
1089 }
1090 }
1091
Matthias Lederhoferad8b4f52006-07-13 10:02:29[diff] [blame]1092 if (strict_paths && (!ok_paths || !*ok_paths))
1093 die("option --strict-paths requires a whitelist");
1094
Junio C Hamano90b4a712008-09-09 08:27:07[diff] [blame]1095 if (base_path && !is_directory(base_path))
1096 die("base-path '%s' does not exist or is not a directory",
1097 base_path);
Johannes Sixt20632072008-02-26 12:00:55[diff] [blame]1098
lars.doelle@on-line.de7c3693f2005-09-08 01:50:01[diff] [blame]1099 if (inetd_mode) {
David Woodhouse5b276ee2006-06-20 14:38:13[diff] [blame]1100 struct sockaddr_storage ss;
1101 struct sockaddr *peer = (struct sockaddr *)&ss;
1102 socklen_t slen = sizeof(ss);
1103
René Scharfec569b1f2008-12-26 09:46:25[diff] [blame]1104 if (!freopen("/dev/null", "w", stderr))
Thomas Rastd824cbb2009-06-27 15:58:46[diff] [blame]1105 die_errno("failed to redirect stderr to /dev/null");
David Woodhouse5b276ee2006-06-20 14:38:13[diff] [blame]1106
1107 if (getpeername(0, peer, &slen))
1108 peer = NULL;
1109
1110 return execute(peer);
lars.doelle@on-line.de7c3693f2005-09-08 01:50:01[diff] [blame]1111 }
Andreas Ericssonbce82302005-11-14 16:41:01[diff] [blame]1112
Stephen R. van den Berg6a992e92008-08-14 18:02:20[diff] [blame]1113 if (detach) {
Matthias Lederhofera5262762006-07-13 16:47:13[diff] [blame]1114 daemonize();
Stephen R. van den Berg6a992e92008-08-14 18:02:20[diff] [blame]1115 loginfo("Ready to rumble");
1116 }
Matthias Lederhofera5262762006-07-13 16:47:13[diff] [blame]1117 else
1118 sanitize_stdfds();
Matthias Lederhofer258e93a2006-07-13 16:32:11[diff] [blame]1119
Matthias Lederhofer45ed5d72006-07-13 10:18:08[diff] [blame]1120 if (pid_file)
1121 store_pid(pid_file);
1122
Jon Loeligerdd467622006-09-26 14:47:43[diff] [blame]1123 return serve(listen_addr, listen_port, pass, gid);
Linus Torvaldsa87e8be2005-07-14 02:45:26[diff] [blame]1124}