1 /* Copyright (C) 2009-2010, Martin Johansson <martin@fatbob.nu>
2 Copyright (C) 2005-2010, Thorvald Natvig <thorvald@natvig.com>
6 Redistribution and use in source and binary forms, with or without
7 modification, are permitted provided that the following conditions
10 - Redistributions of source code must retain the above copyright notice,
11 this list of conditions and the following disclaimer.
12 - Redistributions in binary form must reproduce the above copyright notice,
13 this list of conditions and the following disclaimer in the documentation
14 and/or other materials provided with the distribution.
15 - Neither the name of the Developers nor the names of its contributors may
16 be used to endorse or promote products derived from this software without
17 specific prior written permission.
19 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
23 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
26 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
27 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
28 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
29 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 #include <sys/types.h>
37 #include <sys/utsname.h>
45 #ifdef _POSIX_PRIORITY_SCHEDULING
56 char system_string[64], version_string[64];
60 void lockfile(const char *pidfile)
65 lfp = open(pidfile, O_RDWR|O_CREAT|O_EXCL, 0640);
68 Log_fatal("Cannot open PID-file %s for writing", pidfile);
69 snprintf(str,16,"%d\n", getpid());
70 write(lfp, str, strlen(str)); /* record pid to lockfile */
72 Log_info("PID-file: %s", pidfile);
75 /* Drops privileges (if configured to do so). */
76 static void switch_user(void)
79 struct group *grp = NULL;
80 const char *username, *groupname;
83 username = getStrConf(USERNAME);
84 groupname = getStrConf(GROUPNAME);
87 /* It's an error to specify groupname
88 * but leave username empty.
91 Log_fatal("username missing");
97 pwd = getpwnam(username);
99 Log_fatal("Unknown user '%s'", username);
104 grp = getgrnam(groupname);
107 Log_fatal("Unknown group '%s'", groupname);
112 if (initgroups(pwd->pw_name, gid))
113 Log_fatal("initgroups() failed: %s", strerror(errno));
116 Log_fatal("setgid() failed: %s", strerror(errno));
118 if (setuid(pwd->pw_uid))
119 Log_fatal("setuid() failed: %s", strerror(errno));
124 Log_fatal("getgrgid() failed: %s", strerror(errno));
126 Log_info("Switch to user '%s' group '%s'", pwd->pw_name, grp->gr_name);
129 void signal_handler(int sig)
133 /* XXX - do stuff? */
134 Log_info("HUP signal");
137 Log_info("TERM signal. Shutting down.");
148 return; /* already a daemon */
151 fprintf(stderr, "Fork error. Exiting\n");
152 exit(1); /* fork error */
155 exit(0); /* parent exits */
157 /* child (daemon) continues */
158 setsid(); /* obtain a new process group */
159 for (i = getdtablesize(); i >= 0; --i)
160 close(i); /* close all descriptors */
162 i = open("/dev/null",O_RDWR);
166 umask(027); /* set newly created file permissions */
171 #ifdef _POSIX_PRIORITY_SCHEDULING
175 struct sched_param sp;
177 sp.sched_priority = sched_get_priority_min(SCHED_RR); /* Should suffice */
178 Log_info("Setting SCHED_RR prio %d", sp.sched_priority);
179 rc = sched_setscheduler(0, SCHED_RR, &sp);
181 Log_warn("Failed to set scheduler: %s", strerror(errno));
187 printf("uMurmur version %s. Mumble protocol %d.%d.%d\n", UMURMUR_VERSION, PROTVER_MAJOR, PROTVER_MINOR, PROTVER_PATCH);
188 printf("Usage: umurmurd [-d] [-p <pidfile>] [-c <conf file>] [-h]\n");
189 printf(" -d - Do not daemonize\n");
190 printf(" -p <pidfile> - Write PID to this file\n");
191 printf(" -c <conf file> - Specify configuration file\n");
192 #ifdef _POSIX_PRIORITY_SCHEDULING
193 printf(" -r - Run with realtime priority\n");
195 printf(" -a <address> - Bind to IP address\n");
196 printf(" -b <port> - Bind to port\n");
197 printf(" -h - Print this help\n");
201 int main(int argc, char **argv)
203 bool_t nodaemon = false;
204 #ifdef _POSIX_PRIORITY_SCHEDULING
205 bool_t realtime = false;
207 char *conffile = NULL, *pidfile = NULL;
209 struct utsname utsbuf;
212 #ifdef _POSIX_PRIORITY_SCHEDULING
213 while ((c = getopt(argc, argv, "drp:c:a:b:h")) != EOF) {
215 while ((c = getopt(argc, argv, "dp:c:a:b:h")) != EOF) {
228 bindport = atoi(optarg);
236 #ifdef _POSIX_PRIORITY_SCHEDULING
242 fprintf(stderr, "Unrecognized option\n");
248 /* Logging to terminal if not daemonizing, otherwise to syslog.
249 * Need to initialize logging before calling Conf_init()
256 /* Initialize the config subsystem early;
257 * switch_user() will need to read some config variables.
269 signal(SIGCHLD, SIG_IGN); /* ignore child */
270 signal(SIGTSTP, SIG_IGN); /* ignore tty signals */
271 signal(SIGTTOU, SIG_IGN);
272 signal(SIGTTIN, SIG_IGN);
273 signal(SIGPIPE, SIG_IGN);
274 signal(SIGHUP, signal_handler); /* catch hangup signal */
275 signal(SIGTERM, signal_handler); /* catch kill signal */
277 /* Build system string */
278 if (uname(&utsbuf) == 0) {
279 snprintf(system_string, 64, "%s %s", utsbuf.sysname, utsbuf.machine);
280 snprintf(version_string, 64, "%s", utsbuf.release);
283 snprintf(system_string, 64, "unknown unknown");
284 snprintf(version_string, 64, "unknown");
292 #ifdef _POSIX_PRIORITY_SCHEDULING