root/src/stratcond.c

Revision 5b63423e3ea22c19a8187dfcce162d43e0159643, 6.2 kB (checked in by Theo Schlossnagle <jesus@omniti.com>, 5 years ago)

pull out the watchdog stuff into utils and integrate it back into noitd and now into stratcond, refs #131

  • Property mode set to 100644
Line 
1 /*
2  * Copyright (c) 2007-2009, OmniTI Computer Consulting, Inc.
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions are
7  * met:
8  *
9  *     * Redistributions of source code must retain the above copyright
10  *       notice, this list of conditions and the following disclaimer.
11  *     * Redistributions in binary form must reproduce the above
12  *       copyright notice, this list of conditions and the following
13  *       disclaimer in the documentation and/or other materials provided
14  *       with the distribution.
15  *     * Neither the name OmniTI Computer Consulting, Inc. nor the names
16  *       of its contributors may be used to endorse or promote products
17  *       derived from this software without specific prior written
18  *       permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31  */
32
33 #include "noit_defines.h"
34
35 #include <assert.h>
36 #include <stdio.h>
37 #include <stdlib.h>
38 #include <unistd.h>
39 #include <errno.h>
40 #include <sys/ioctl.h>
41 #include <fcntl.h>
42
43 #include "eventer/eventer.h"
44 #include "utils/noit_log.h"
45 #include "utils/noit_hash.h"
46 #include "utils/noit_security.h"
47 #include "utils/noit_watchdog.h"
48 #include "noit_listener.h"
49 #include "noit_console.h"
50 #include "noit_module.h"
51 #include "noit_conf.h"
52 #include "stratcon_jlog_streamer.h"
53 #include "stratcon_datastore.h"
54 #include "stratcon_iep.h"
55 #include "stratcon_realtime_http.h"
56
57 #define APPNAME "stratcon"
58 static char *config_file = ETC_DIR "/" APPNAME ".conf";
59 static const char *droptouser = NULL;
60 static const char *droptogroup = NULL;
61 static const char *chrootpath = NULL;
62 static int foreground = 0;
63 static int debug = 0;
64
65 #include "man/stratcond.usage.h"
66 static void usage(const char *progname) {
67   printf("Usage for %s:\n", progname);
68 #ifdef STRATCOND_USAGE
69   assert(write(STDOUT_FILENO,
70               STRATCOND_USAGE,
71               sizeof(STRATCOND_USAGE)-1) == sizeof(STRATCOND_USAGE)-1);
72 #else
73   printf("\nError in usage, build problem.\n");
74 #endif
75   return;
76 }
77
78 void parse_clargs(int argc, char **argv) {
79   int c;
80   while((c = getopt(argc, argv, "hc:dDu:g:t:")) != EOF) {
81     switch(c) {
82       case 'h':
83         usage(argv[0]);
84         exit(1);
85         break;
86       case 'u':
87         droptouser = strdup(optarg);
88         break;
89       case 'g':
90         droptogroup = strdup(optarg);
91         break;
92       case 't':
93         chrootpath = strdup(optarg);
94         break;
95       case 'c':
96         config_file = strdup(optarg);
97         break;
98       case 'd':
99         debug++;
100         break;
101       case 'D':
102         foreground = 1;
103         break;
104       default:
105         break;
106     }
107   }
108 }
109
110 static
111 int configure_eventer() {
112   int rv = 0;
113   noit_hash_table *table;
114   table = noit_conf_get_hash(NULL, "/" APPNAME "/eventer/config");
115   if(table) {
116     noit_hash_iter iter = NOIT_HASH_ITER_ZERO;
117     const char *key, *value;
118     int klen;
119     while(noit_hash_next_str(table, &iter, &key, &klen, &value)) {
120       int subrv;
121       if((subrv = eventer_propset(key, value)) != 0)
122         rv = subrv;
123     }
124     noit_hash_destroy(table, free, free);
125     free(table);
126   }
127   return rv;
128 }
129
130 static int child_main() {
131   char conf_str[1024];
132
133   /* First initialize logging, so we can log errors */
134   noit_log_init();
135   noit_log_stream_add_stream(noit_debug, noit_stderr);
136   noit_log_stream_add_stream(noit_error, noit_stderr);
137
138   /* Next load the configs */
139   noit_conf_init(APPNAME);
140   if(noit_conf_load(config_file) == -1) {
141     fprintf(stderr, "Cannot load config: '%s'\n", config_file);
142     exit(2);
143   }
144
145   /* Reinitialize the logging system now that we have a config */
146   noit_conf_log_init(APPNAME);
147   if(debug)
148     noit_debug->enabled = 1;
149
150   /* Lastly, run through all other system inits */
151   if(!noit_conf_get_stringbuf(NULL, "/" APPNAME "/eventer/@implementation",
152                               conf_str, sizeof(conf_str))) {
153     noitL(noit_stderr, "Cannot find '%s' in configuration\n",
154           "/" APPNAME "/eventer/@implementation");
155     exit(-1);
156   }
157   if(eventer_choose(conf_str) == -1) {
158     noitL(noit_stderr, "Cannot choose eventer %s\n", conf_str);
159     exit(-1);
160   }
161   if(configure_eventer() != 0) {
162     noitL(noit_stderr, "Cannot configure eventer\n");
163     exit(-1);
164   }
165   if(eventer_init() == -1) {
166     noitL(noit_stderr, "Cannot init eventer %s\n", conf_str);
167     exit(-1);
168   }
169
170   noit_watchdog_child_eventer_heartbeat();
171
172   noit_console_init(APPNAME);
173   stratcon_realtime_http_init(APPNAME);
174   noit_listener_init(APPNAME);
175
176   /* Drop privileges */
177   if(chrootpath && noit_security_chroot(chrootpath)) {
178     noitL(noit_stderr, "Failed to chroot(), exiting.\n");
179     exit(-1);
180   }
181   if(noit_security_usergroup(droptouser, droptogroup)) {
182     noitL(noit_stderr, "Failed to drop privileges, exiting.\n");
183     exit(-1);
184   }
185
186   stratcon_iep_init();
187   stratcon_jlog_streamer_init(APPNAME);
188
189   /* Write our log out, and setup a watchdog to write it out on change. */
190   stratcon_datastore_saveconfig(NULL);
191   noit_conf_coalesce_changes(10); /* 10 seconds of no changes before we write */
192   noit_conf_watch_and_journal_watchdog(stratcon_datastore_saveconfig, NULL);
193
194   eventer_loop();
195   return 0;
196 }
197
198 int main(int argc, char **argv) {
199   parse_clargs(argc, argv);
200
201   if(chdir("/") != 0) {
202     fprintf(stderr, "cannot chdir(\"/\"): %s\n", strerror(errno));
203     exit(2);
204   }
205
206   noit_watchdog_prefork_init();
207
208   if(foreground) exit(child_main());
209
210   close(STDIN_FILENO);
211   close(STDOUT_FILENO);
212   close(STDERR_FILENO);
213   if(fork()) exit(0);
214   setsid();
215   if(fork()) exit(0);
216
217   return noit_watchdog_start_child("stratcond", child_main, 0);
218 }
Note: See TracBrowser for help on using the browser.