1 /*
2 * SysDB - src/sysdbd.c
3 * Copyright (C) 2012 Sebastian 'tokkee' Harl <sh@tokkee.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
17 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
19 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
28 #if HAVE_CONFIG_H
29 # include "config.h"
30 #endif /* HAVE_CONFIG_H */
32 #include "sysdb.h"
33 #include "core/plugin.h"
34 #include "core/store.h"
35 #include "utils/error.h"
36 #include "utils/string.h"
38 #include "daemon/config.h"
40 #if HAVE_LIBGEN_H
41 # include <libgen.h>
42 #else /* HAVE_LIBGEN_H */
43 # define basename(path) (path)
44 #endif /* ! HAVE_LIBGEN_H */
46 #include <errno.h>
48 #include <sys/stat.h>
49 #include <fcntl.h>
51 #include <signal.h>
53 #include <stdio.h>
54 #include <stdlib.h>
55 #include <string.h>
57 #include <unistd.h>
59 #ifndef CONFIGFILE
60 # define CONFIGFILE SYSCONFDIR"/sysdb/sysdbd.conf"
61 #endif
63 static sdb_plugin_loop_t plugin_main_loop = SDB_PLUGIN_LOOP_INIT;
65 static void
66 sigintterm_handler(int __attribute__((unused)) signo)
67 {
68 plugin_main_loop.do_loop = 0;
69 } /* sigintterm_handler */
71 static void
72 exit_usage(char *name, int status)
73 {
74 printf(
75 "Usage: %s <options>\n"
77 "\nOptions:\n"
78 " -C FILE the main configuration file\n"
79 " default: "CONFIGFILE"\n"
80 " -d run in background (daemonize)\n"
81 "\n"
82 " -h display this help and exit\n"
83 " -V display the version number and copyright\n"
85 "\nSysDB daemon "SDB_VERSION_STRING SDB_VERSION_EXTRA", "PACKAGE_URL"\n",
86 basename(name));
87 exit(status);
88 } /* exit_usage */
90 static void
91 exit_version(void)
92 {
93 printf("SysDBd version "SDB_VERSION_STRING SDB_VERSION_EXTRA", "
94 "built "BUILD_DATE"\n"
95 "using libsysdb verion %s%s\n"
96 "Copyright (C) 2012 "PACKAGE_MAINTAINER"\n"
98 "\nThis is free software under the terms of the BSD license, see "
99 "the source for\ncopying conditions. There is NO WARRANTY; not "
100 "even for MERCHANTABILITY or\nFITNESS FOR A PARTICULAR "
101 "PURPOSE.\n", sdb_version_string(), sdb_version_extra());
102 exit(0);
103 } /* exit_version */
105 static int
106 daemonize(void)
107 {
108 pid_t pid;
110 if ((pid = fork()) < 0) {
111 char errbuf[1024];
112 sdb_log(SDB_LOG_ERR, "Failed to fork to background: %s\n",
113 sdb_strerror(errno, errbuf, sizeof(errbuf)));
114 return errno;
115 }
116 else if (pid != 0) {
117 /* parent */
118 exit(0);
119 }
121 if (chdir("/")) {
122 char errbuf[1024];
123 sdb_log(SDB_LOG_ERR, "Failed to change working directory to "
124 "the root directory: %s\n",
125 sdb_strerror(errno, errbuf, sizeof(errbuf)));
126 return errno;
127 }
129 /* detach from session */
130 setsid();
132 close(0);
133 if (open("/dev/null", O_RDWR)) {
134 char errbuf[1024];
135 sdb_log(SDB_LOG_ERR, "Failed to connect stdin to '/dev/null': "
136 "%s\n", sdb_strerror(errno, errbuf, sizeof(errbuf)));
137 return errno;
138 }
140 close(1);
141 if (dup(0) != 1) {
142 char errbuf[1024];
143 sdb_log(SDB_LOG_ERR, "Could not connect stdout to '/dev/null': "
144 "%s\n", sdb_strerror(errno, errbuf, sizeof(errbuf)));
145 return errno;
146 }
148 close(2);
149 if (dup(0) != 2) {
150 char errbuf[1024];
151 sdb_log(SDB_LOG_ERR, "Could not connect stderr to '/dev/null': "
152 "%s\n", sdb_strerror(errno, errbuf, sizeof(errbuf)));
153 return errno;
154 }
155 return 0;
156 } /* daemonize */
158 int
159 main(int argc, char **argv)
160 {
161 char *config_filename = NULL;
162 _Bool do_daemonize = 0;
164 struct sigaction sa_intterm;
166 while (42) {
167 int opt = getopt(argc, argv, "C:dhV");
169 if (-1 == opt)
170 break;
172 switch (opt) {
173 case 'C':
174 config_filename = optarg;
175 break;
176 case 'd':
177 do_daemonize = 1;
178 break;
180 case 'h':
181 exit_usage(argv[0], 0);
182 break;
183 case 'V':
184 exit_version();
185 break;
186 default:
187 exit_usage(argv[0], 1);
188 }
189 }
191 if (optind < argc)
192 exit_usage(argv[0], 1);
194 if (! config_filename)
195 config_filename = CONFIGFILE;
197 if (daemon_parse_config(config_filename)) {
198 sdb_log(SDB_LOG_ERR, "Failed to parse configuration file.\n");
199 exit(1);
200 }
202 memset(&sa_intterm, 0, sizeof(sa_intterm));
203 sa_intterm.sa_handler = sigintterm_handler;
204 sa_intterm.sa_flags = 0;
206 if (sigaction(SIGINT, &sa_intterm, /* old action */ NULL)) {
207 char errbuf[1024];
208 sdb_log(SDB_LOG_ERR, "Failed to install signal handler for "
209 "SIGINT: %s\n", sdb_strerror(errno, errbuf, sizeof(errbuf)));
210 exit(1);
211 }
212 if (sigaction(SIGTERM, &sa_intterm, /* old action */ NULL)) {
213 char errbuf[1024];
214 sdb_log(SDB_LOG_ERR, "Failed to install signal handler for "
215 "SIGTERM: %s\n", sdb_strerror(errno, errbuf, sizeof(errbuf)));
216 exit(1);
217 }
219 if (do_daemonize)
220 if (daemonize())
221 exit(1);
223 sdb_log(SDB_LOG_INFO, "SysDB daemon "SDB_VERSION_STRING
224 SDB_VERSION_EXTRA " (pid %i) initialized successfully\n",
225 (int)getpid());
227 sdb_plugin_init_all();
228 sdb_plugin_collector_loop(&plugin_main_loop);
230 sdb_log(SDB_LOG_INFO, "Shutting down SysDB daemon "SDB_VERSION_STRING
231 SDB_VERSION_EXTRA" (pid %i)\n", (int)getpid());
233 fprintf(stderr, "Store dump:\n");
234 sdb_store_dump(stderr);
235 return 0;
236 } /* main */
238 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */