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Commit | Line | Data |
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8b886ca7 | 1 | /* |
8b886ca7 | 2 | Monitor status of quagga daemons and restart if necessary. |
3 | ||
4 | Copyright (C) 2004 Andrew J. Schorr | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | */ | |
20 | ||
a365534f | 21 | #include <zebra.h> |
8b886ca7 | 22 | #include <thread.h> |
23 | #include <log.h> | |
52e66296 | 24 | #include <network.h> |
8b886ca7 | 25 | #include <sigevent.h> |
a365534f | 26 | #include <lib/version.h> |
6f594023 | 27 | #include <getopt.h> |
a365534f | 28 | #include <sys/un.h> |
29 | #include <sys/wait.h> | |
8b886ca7 | 30 | |
31 | #ifndef MIN | |
32 | #define MIN(X,Y) (((X) <= (Y)) ? (X) : (Y)) | |
33 | #endif | |
34 | ||
35 | /* Macros to help randomize timers. */ | |
36 | #define JITTER(X) ((random() % ((X)+1))-((X)/2)) | |
37 | #define FUZZY(X) ((X)+JITTER((X)/20)) | |
38 | ||
39 | #define DEFAULT_PERIOD 5 | |
40 | #define DEFAULT_TIMEOUT 10 | |
41 | #define DEFAULT_RESTART_TIMEOUT 20 | |
42 | #define DEFAULT_LOGLEVEL LOG_INFO | |
43 | #define DEFAULT_MIN_RESTART 60 | |
44 | #define DEFAULT_MAX_RESTART 600 | |
6028df52 | 45 | #ifdef PATH_WATCHQUAGGA_PID |
46 | #define DEFAULT_PIDFILE PATH_WATCHQUAGGA_PID | |
47 | #else | |
8b886ca7 | 48 | #define DEFAULT_PIDFILE STATEDIR "/watchquagga.pid" |
6028df52 | 49 | #endif |
16f6511e | 50 | #ifdef DAEMON_VTY_DIR |
51 | #define VTYDIR DAEMON_VTY_DIR | |
52 | #else | |
53 | #define VTYDIR STATEDIR | |
54 | #endif | |
8b886ca7 | 55 | |
56 | #define PING_TOKEN "PING" | |
57 | ||
58 | /* Needs to be global, referenced somewhere inside libzebra. */ | |
59 | struct thread_master *master; | |
60 | ||
61 | typedef enum | |
62 | { | |
63 | MODE_MONITOR = 0, | |
64 | MODE_GLOBAL_RESTART, | |
65 | MODE_SEPARATE_RESTART, | |
66 | MODE_PHASED_ZEBRA_RESTART, | |
67 | MODE_PHASED_ALL_RESTART | |
68 | } watch_mode_t; | |
69 | ||
70 | static const char *mode_str[] = | |
71 | { | |
72 | "monitor", | |
73 | "global restart", | |
74 | "individual daemon restart", | |
75 | "phased zebra restart", | |
76 | "phased global restart for any failure", | |
77 | }; | |
78 | ||
79 | typedef enum | |
80 | { | |
81 | PHASE_NONE = 0, | |
82 | PHASE_STOPS_PENDING, | |
83 | PHASE_WAITING_DOWN, | |
84 | PHASE_ZEBRA_RESTART_PENDING, | |
85 | PHASE_WAITING_ZEBRA_UP | |
86 | } restart_phase_t; | |
87 | ||
88 | static const char *phase_str[] = | |
89 | { | |
90 | "None", | |
91 | "Stop jobs running", | |
92 | "Waiting for other daemons to come down", | |
93 | "Zebra restart job running", | |
94 | "Waiting for zebra to come up", | |
95 | "Start jobs running", | |
96 | }; | |
97 | ||
98 | #define PHASE_TIMEOUT (3*gs.restart_timeout) | |
99 | ||
098e240f | 100 | struct restart_info |
101 | { | |
102 | const char *name; | |
103 | const char *what; | |
104 | pid_t pid; | |
105 | struct timeval time; | |
106 | long interval; | |
107 | struct thread *t_kill; | |
108 | int kills; | |
109 | }; | |
110 | ||
111 | static struct global_state | |
112 | { | |
8b886ca7 | 113 | watch_mode_t mode; |
114 | restart_phase_t phase; | |
115 | struct thread *t_phase_hanging; | |
116 | const char *vtydir; | |
117 | long period; | |
118 | long timeout; | |
119 | long restart_timeout; | |
120 | long min_restart_interval; | |
121 | long max_restart_interval; | |
122 | int do_ping; | |
123 | struct daemon *daemons; | |
124 | const char *restart_command; | |
125 | const char *start_command; | |
126 | const char *stop_command; | |
098e240f | 127 | struct restart_info restart; |
8b886ca7 | 128 | int unresponsive_restart; |
129 | int loglevel; | |
130 | struct daemon *special; /* points to zebra when doing phased restart */ | |
131 | int numdaemons; | |
132 | int numpids; | |
133 | int numdown; /* # of daemons that are not UP or UNRESPONSIVE */ | |
134 | } gs = { | |
135 | .mode = MODE_MONITOR, | |
136 | .phase = PHASE_NONE, | |
16f6511e | 137 | .vtydir = VTYDIR, |
8b886ca7 | 138 | .period = 1000*DEFAULT_PERIOD, |
139 | .timeout = DEFAULT_TIMEOUT, | |
140 | .restart_timeout = DEFAULT_RESTART_TIMEOUT, | |
141 | .loglevel = DEFAULT_LOGLEVEL, | |
142 | .min_restart_interval = DEFAULT_MIN_RESTART, | |
143 | .max_restart_interval = DEFAULT_MAX_RESTART, | |
144 | .do_ping = 1, | |
8b886ca7 | 145 | }; |
146 | ||
147 | typedef enum | |
148 | { | |
149 | DAEMON_INIT, | |
150 | DAEMON_DOWN, | |
151 | DAEMON_CONNECTING, | |
152 | DAEMON_UP, | |
153 | DAEMON_UNRESPONSIVE | |
154 | } daemon_state_t; | |
155 | ||
156 | #define IS_UP(DMN) \ | |
157 | (((DMN)->state == DAEMON_UP) || ((DMN)->state == DAEMON_UNRESPONSIVE)) | |
158 | ||
159 | static const char *state_str[] = | |
160 | { | |
161 | "Init", | |
162 | "Down", | |
163 | "Connecting", | |
164 | "Up", | |
165 | "Unresponsive", | |
166 | }; | |
167 | ||
168 | struct daemon { | |
169 | const char *name; | |
170 | daemon_state_t state; | |
171 | int fd; | |
172 | struct timeval echo_sent; | |
173 | u_int connect_tries; | |
174 | struct thread *t_wakeup; | |
175 | struct thread *t_read; | |
176 | struct thread *t_write; | |
177 | struct daemon *next; | |
178 | struct restart_info restart; | |
179 | }; | |
180 | ||
181 | static const struct option longopts[] = | |
182 | { | |
183 | { "daemon", no_argument, NULL, 'd'}, | |
184 | { "statedir", required_argument, NULL, 'S'}, | |
185 | { "no-echo", no_argument, NULL, 'e'}, | |
186 | { "loglevel", required_argument, NULL, 'l'}, | |
187 | { "interval", required_argument, NULL, 'i'}, | |
188 | { "timeout", required_argument, NULL, 't'}, | |
189 | { "restart-timeout", required_argument, NULL, 'T'}, | |
190 | { "restart", required_argument, NULL, 'r'}, | |
191 | { "start-command", required_argument, NULL, 's'}, | |
192 | { "kill-command", required_argument, NULL, 'k'}, | |
193 | { "restart-all", required_argument, NULL, 'R'}, | |
194 | { "all-restart", no_argument, NULL, 'a'}, | |
195 | { "always-all-restart", no_argument, NULL, 'A'}, | |
196 | { "unresponsive-restart", no_argument, NULL, 'z'}, | |
197 | { "min-restart-interval", required_argument, NULL, 'm'}, | |
198 | { "max-restart-interval", required_argument, NULL, 'M'}, | |
199 | { "pid-file", required_argument, NULL, 'p'}, | |
c8b40f86 | 200 | { "blank-string", required_argument, NULL, 'b'}, |
8b886ca7 | 201 | { "help", no_argument, NULL, 'h'}, |
202 | { "version", no_argument, NULL, 'v'}, | |
203 | { NULL, 0, NULL, 0 } | |
204 | }; | |
205 | ||
206 | static int try_connect(struct daemon *dmn); | |
207 | static int wakeup_send_echo(struct thread *t_wakeup); | |
208 | static void try_restart(struct daemon *dmn); | |
209 | static void phase_check(void); | |
210 | ||
211 | static int | |
212 | usage(const char *progname, int status) | |
213 | { | |
214 | if (status != 0) | |
215 | fprintf(stderr, "Try `%s --help' for more information.\n", progname); | |
216 | else | |
217 | printf("Usage : %s [OPTION...] <daemon name> ...\n\n\ | |
218 | Watchdog program to monitor status of quagga daemons and try to restart\n\ | |
219 | them if they are down or unresponsive. It determines whether a daemon is\n\ | |
220 | up based on whether it can connect to the daemon's vty unix stream socket.\n\ | |
221 | It then repeatedly sends echo commands over that socket to determine whether\n\ | |
222 | the daemon is responsive. If the daemon crashes, we will receive an EOF\n\ | |
223 | on the socket connection and know immediately that the daemon is down.\n\n\ | |
224 | The daemons to be monitored should be listed on the command line.\n\n\ | |
225 | This program can run in one of 5 modes:\n\n\ | |
226 | 0. Mode: %s.\n\ | |
227 | Just monitor and report on status changes. Example:\n\ | |
228 | %s -d zebra ospfd bgpd\n\n\ | |
229 | 1. Mode: %s.\n\ | |
230 | Whenever any daemon hangs or crashes, use the given command to restart\n\ | |
231 | them all. Example:\n\ | |
232 | %s -dz \\\n\ | |
233 | -R '/sbin/service zebra restart; /sbin/service ospfd restart' \\\n\ | |
234 | zebra ospfd\n\n\ | |
235 | 2. Mode: %s.\n\ | |
236 | When any single daemon hangs or crashes, restart only the daemon that's\n\ | |
237 | in trouble using the supplied restart command. Example:\n\ | |
238 | %s -dz -r '/sbin/service %%s restart' zebra ospfd bgpd\n\n\ | |
239 | 3. Mode: %s.\n\ | |
240 | The same as the previous mode, except that there is special treatment when\n\ | |
241 | the zebra daemon is in trouble. In that case, a phased restart approach\n\ | |
242 | is used: 1. stop all other daemons; 2. restart zebra; 3. start the other\n\ | |
243 | daemons. Example:\n\ | |
244 | %s -adz -r '/sbin/service %%s restart' \\\n\ | |
245 | -s '/sbin/service %%s start' \\\n\ | |
246 | -k '/sbin/service %%s stop' zebra ospfd bgpd\n\n\ | |
247 | 4. Mode: %s.\n\ | |
248 | This is the same as the previous mode, except that the phased restart\n\ | |
249 | procedure is used whenever any of the daemons hangs or crashes. Example:\n\ | |
250 | %s -Adz -r '/sbin/service %%s restart' \\\n\ | |
251 | -s '/sbin/service %%s start' \\\n\ | |
252 | -k '/sbin/service %%s stop' zebra ospfd bgpd\n\n\ | |
253 | As of this writing, it is believed that mode 2 [%s]\n\ | |
254 | is not safe, and mode 3 [%s] may not be safe with some of the\n\ | |
255 | routing daemons.\n\n\ | |
256 | In order to avoid attempting to restart the daemons in a fast loop,\n\ | |
257 | the -m and -M options allow you to control the minimum delay between\n\ | |
258 | restart commands. The minimum restart delay is recalculated each time\n\ | |
259 | a restart is attempted: if the time since the last restart attempt exceeds\n\ | |
260 | twice the -M value, then the restart delay is set to the -m value.\n\ | |
261 | Otherwise, the interval is doubled (but capped at the -M value).\n\n\ | |
262 | Options:\n\ | |
263 | -d, --daemon Run in daemon mode. In this mode, error messages are sent\n\ | |
264 | to syslog instead of stdout.\n\ | |
265 | -S, --statedir Set the vty socket directory (default is %s)\n\ | |
266 | -e, --no-echo Do not ping the daemons to test responsiveness (this\n\ | |
267 | option is necessary if the daemons do not support the\n\ | |
268 | echo command)\n\ | |
269 | -l, --loglevel Set the logging level (default is %d).\n\ | |
270 | The value should range from %d (LOG_EMERG) to %d (LOG_DEBUG),\n\ | |
271 | but it can be set higher than %d if extra-verbose debugging\n\ | |
272 | messages are desired.\n\ | |
273 | -m, --min-restart-interval\n\ | |
274 | Set the minimum seconds to wait between invocations of daemon\n\ | |
275 | restart commands (default is %d).\n\ | |
276 | -M, --max-restart-interval\n\ | |
277 | Set the maximum seconds to wait between invocations of daemon\n\ | |
278 | restart commands (default is %d).\n\ | |
279 | -i, --interval Set the status polling interval in seconds (default is %d)\n\ | |
280 | -t, --timeout Set the unresponsiveness timeout in seconds (default is %d)\n\ | |
281 | -T, --restart-timeout\n\ | |
282 | Set the restart (kill) timeout in seconds (default is %d).\n\ | |
283 | If any background jobs are still running after this much\n\ | |
284 | time has elapsed, they will be killed.\n\ | |
285 | -r, --restart Supply a Bourne shell command to use to restart a single\n\ | |
286 | daemon. The command string should include '%%s' where the\n\ | |
287 | name of the daemon should be substituted.\n\ | |
288 | Note that -r and -R are incompatible.\n\ | |
289 | -s, --start-command\n\ | |
290 | Supply a Bourne shell to command to use to start a single\n\ | |
291 | daemon. The command string should include '%%s' where the\n\ | |
292 | name of the daemon should be substituted.\n\ | |
293 | -k, --kill-command\n\ | |
294 | Supply a Bourne shell to command to use to stop a single\n\ | |
295 | daemon. The command string should include '%%s' where the\n\ | |
296 | name of the daemon should be substituted.\n\ | |
297 | -R, --restart-all\n\ | |
298 | When one or more daemons is down, try to restart everything\n\ | |
299 | using the Bourne shell command supplied as the argument.\n\ | |
300 | Note that -r and -R are incompatible.\n\ | |
301 | -z, --unresponsive-restart\n\ | |
302 | When a daemon is unresponsive, treat it as being down for\n\ | |
303 | restart purposes.\n\ | |
304 | -a, --all-restart\n\ | |
305 | When zebra hangs or crashes, restart all daemons using\n\ | |
306 | this phased approach: 1. stop all other daemons; 2. restart\n\ | |
307 | zebra; 3. start other daemons. Requires -r, -s, and -k.\n\ | |
308 | -A, --always-all-restart\n\ | |
309 | When any daemon (not just zebra) hangs or crashes, use the\n\ | |
310 | same phased restart mechanism described above for -a.\n\ | |
311 | Requires -r, -s, and -k.\n\ | |
312 | -p, --pid-file Set process identifier file name\n\ | |
313 | (default is %s).\n\ | |
c8b40f86 | 314 | -b, --blank-string\n\ |
315 | When the supplied argument string is found in any of the\n\ | |
316 | various shell command arguments (-r, -s, -k, or -R), replace\n\ | |
317 | it with a space. This is an ugly hack to circumvent problems\n\ | |
318 | passing command-line arguments with embedded spaces.\n\ | |
8b886ca7 | 319 | -v, --version Print program version\n\ |
320 | -h, --help Display this help and exit\n\ | |
321 | ", progname,mode_str[0],progname,mode_str[1],progname,mode_str[2], | |
322 | progname,mode_str[3],progname,mode_str[4],progname,mode_str[2],mode_str[3], | |
16f6511e | 323 | VTYDIR,DEFAULT_LOGLEVEL,LOG_EMERG,LOG_DEBUG,LOG_DEBUG, |
8b886ca7 | 324 | DEFAULT_MIN_RESTART,DEFAULT_MAX_RESTART, |
325 | DEFAULT_PERIOD,DEFAULT_TIMEOUT,DEFAULT_RESTART_TIMEOUT,DEFAULT_PIDFILE); | |
326 | ||
327 | return status; | |
328 | } | |
329 | ||
330 | static pid_t | |
331 | run_background(const char *shell_cmd) | |
332 | { | |
333 | pid_t child; | |
334 | ||
335 | switch (child = fork()) | |
336 | { | |
337 | case -1: | |
338 | zlog_err("fork failed, cannot run command [%s]: %s", | |
339 | shell_cmd,safe_strerror(errno)); | |
340 | return -1; | |
341 | case 0: | |
342 | /* Child process. */ | |
343 | /* Use separate process group so child processes can be killed easily. */ | |
344 | if (setpgid(0,0) < 0) | |
345 | zlog_warn("warning: setpgid(0,0) failed: %s",safe_strerror(errno)); | |
346 | { | |
347 | const char *argv[4] = { "sh", "-c", shell_cmd, NULL}; | |
348 | execv("/bin/sh",(char *const *)argv); | |
349 | zlog_err("execv(/bin/sh -c '%s') failed: %s", | |
350 | shell_cmd,safe_strerror(errno)); | |
351 | _exit(127); | |
352 | } | |
353 | default: | |
354 | /* Parent process: we will reap the child later. */ | |
f2d8257f | 355 | zlog_err("Forked background command [pid %d]: %s",(int)child,shell_cmd); |
8b886ca7 | 356 | return child; |
357 | } | |
358 | } | |
359 | ||
360 | static struct timeval * | |
361 | time_elapsed(struct timeval *result, const struct timeval *start_time) | |
362 | { | |
363 | gettimeofday(result,NULL); | |
364 | result->tv_sec -= start_time->tv_sec; | |
365 | result->tv_usec -= start_time->tv_usec; | |
366 | while (result->tv_usec < 0) | |
367 | { | |
368 | result->tv_usec += 1000000L; | |
369 | result->tv_sec--; | |
370 | } | |
371 | return result; | |
372 | } | |
373 | ||
374 | static int | |
375 | restart_kill(struct thread *t_kill) | |
376 | { | |
377 | struct restart_info *restart = THREAD_ARG(t_kill); | |
378 | struct timeval delay; | |
379 | ||
380 | time_elapsed(&delay,&restart->time); | |
381 | zlog_warn("Warning: %s %s child process %d still running after " | |
382 | "%ld seconds, sending signal %d", | |
f2d8257f | 383 | restart->what,restart->name,(int)restart->pid,delay.tv_sec, |
8b886ca7 | 384 | (restart->kills ? SIGKILL : SIGTERM)); |
385 | kill(-restart->pid,(restart->kills ? SIGKILL : SIGTERM)); | |
386 | restart->kills++; | |
387 | restart->t_kill = thread_add_timer(master,restart_kill,restart, | |
388 | gs.restart_timeout); | |
389 | return 0; | |
390 | } | |
391 | ||
392 | static struct restart_info * | |
393 | find_child(pid_t child) | |
394 | { | |
395 | if (gs.mode == MODE_GLOBAL_RESTART) | |
396 | { | |
397 | if (gs.restart.pid == child) | |
398 | return &gs.restart; | |
399 | } | |
400 | else | |
401 | { | |
402 | struct daemon *dmn; | |
403 | for (dmn = gs.daemons; dmn; dmn = dmn->next) | |
404 | { | |
405 | if (dmn->restart.pid == child) | |
406 | return &dmn->restart; | |
407 | } | |
408 | } | |
409 | return NULL; | |
410 | } | |
411 | ||
412 | static void | |
413 | sigchild(void) | |
414 | { | |
415 | pid_t child; | |
416 | int status; | |
417 | const char *name; | |
418 | const char *what; | |
419 | struct restart_info *restart; | |
420 | ||
421 | switch (child = waitpid(-1,&status,WNOHANG)) | |
422 | { | |
423 | case -1: | |
424 | zlog_err("waitpid failed: %s",safe_strerror(errno)); | |
425 | return; | |
426 | case 0: | |
427 | zlog_warn("SIGCHLD received, but waitpid did not reap a child"); | |
428 | return; | |
429 | } | |
430 | ||
431 | if ((restart = find_child(child)) != NULL) | |
432 | { | |
433 | name = restart->name; | |
434 | what = restart->what; | |
435 | restart->pid = 0; | |
436 | gs.numpids--; | |
437 | thread_cancel(restart->t_kill); | |
438 | restart->t_kill = NULL; | |
439 | /* Update restart time to reflect the time the command completed. */ | |
440 | gettimeofday(&restart->time,NULL); | |
441 | } | |
442 | else | |
443 | { | |
444 | zlog_err("waitpid returned status for an unknown child process %d", | |
f2d8257f | 445 | (int)child); |
8b886ca7 | 446 | name = "(unknown)"; |
447 | what = "background"; | |
448 | } | |
449 | if (WIFSTOPPED(status)) | |
450 | zlog_warn("warning: %s %s process %d is stopped", | |
f2d8257f | 451 | what,name,(int)child); |
8b886ca7 | 452 | else if (WIFSIGNALED(status)) |
453 | zlog_warn("%s %s process %d terminated due to signal %d", | |
f2d8257f | 454 | what,name,(int)child,WTERMSIG(status)); |
8b886ca7 | 455 | else if (WIFEXITED(status)) |
456 | { | |
457 | if (WEXITSTATUS(status) != 0) | |
458 | zlog_warn("%s %s process %d exited with non-zero status %d", | |
f2d8257f | 459 | what,name,(int)child,WEXITSTATUS(status)); |
8b886ca7 | 460 | else |
f2d8257f | 461 | zlog_debug("%s %s process %d exited normally",what,name,(int)child); |
8b886ca7 | 462 | } |
463 | else | |
464 | zlog_err("cannot interpret %s %s process %d wait status 0x%x", | |
f2d8257f | 465 | what,name,(int)child,status); |
8b886ca7 | 466 | phase_check(); |
467 | } | |
468 | ||
469 | static int | |
470 | run_job(struct restart_info *restart, const char *cmdtype, const char *command, | |
471 | int force, int update_interval) | |
472 | { | |
473 | struct timeval delay; | |
474 | ||
475 | if (gs.loglevel > LOG_DEBUG+1) | |
476 | zlog_debug("attempting to %s %s",cmdtype,restart->name); | |
477 | ||
478 | if (restart->pid) | |
479 | { | |
480 | if (gs.loglevel > LOG_DEBUG+1) | |
481 | zlog_debug("cannot %s %s, previous pid %d still running", | |
f2d8257f | 482 | cmdtype,restart->name,(int)restart->pid); |
8b886ca7 | 483 | return -1; |
484 | } | |
485 | ||
a8a8ddcd | 486 | /* Note: time_elapsed test must come before the force test, since we need |
487 | to make sure that delay is initialized for use below in updating the | |
488 | restart interval. */ | |
489 | if ((time_elapsed(&delay,&restart->time)->tv_sec < restart->interval) && | |
490 | !force) | |
8b886ca7 | 491 | { |
492 | if (gs.loglevel > LOG_DEBUG+1) | |
493 | zlog_debug("postponing %s %s: " | |
494 | "elapsed time %ld < retry interval %ld", | |
495 | cmdtype,restart->name,(long)delay.tv_sec,restart->interval); | |
496 | return -1; | |
497 | } | |
498 | ||
499 | gettimeofday(&restart->time,NULL); | |
500 | restart->kills = 0; | |
501 | { | |
502 | char cmd[strlen(command)+strlen(restart->name)+1]; | |
503 | snprintf(cmd,sizeof(cmd),command,restart->name); | |
504 | if ((restart->pid = run_background(cmd)) > 0) | |
505 | { | |
506 | restart->t_kill = thread_add_timer(master,restart_kill,restart, | |
507 | gs.restart_timeout); | |
508 | restart->what = cmdtype; | |
509 | gs.numpids++; | |
510 | } | |
511 | else | |
512 | restart->pid = 0; | |
513 | } | |
514 | ||
515 | /* Calculate the new restart interval. */ | |
516 | if (update_interval) | |
517 | { | |
518 | if (delay.tv_sec > 2*gs.max_restart_interval) | |
519 | restart->interval = gs.min_restart_interval; | |
520 | else if ((restart->interval *= 2) > gs.max_restart_interval) | |
521 | restart->interval = gs.max_restart_interval; | |
522 | if (gs.loglevel > LOG_DEBUG+1) | |
523 | zlog_debug("restart %s interval is now %ld", | |
524 | restart->name,restart->interval); | |
525 | } | |
526 | return restart->pid; | |
527 | } | |
528 | ||
529 | #define SET_READ_HANDLER(DMN) \ | |
530 | (DMN)->t_read = thread_add_read(master,handle_read,(DMN),(DMN)->fd) | |
531 | ||
532 | #define SET_WAKEUP_DOWN(DMN) \ | |
533 | (DMN)->t_wakeup = thread_add_timer_msec(master,wakeup_down,(DMN), \ | |
534 | FUZZY(gs.period)) | |
535 | ||
536 | #define SET_WAKEUP_UNRESPONSIVE(DMN) \ | |
537 | (DMN)->t_wakeup = thread_add_timer_msec(master,wakeup_unresponsive,(DMN), \ | |
538 | FUZZY(gs.period)) | |
539 | ||
540 | #define SET_WAKEUP_ECHO(DMN) \ | |
541 | (DMN)->t_wakeup = thread_add_timer_msec(master,wakeup_send_echo,(DMN), \ | |
542 | FUZZY(gs.period)) | |
543 | ||
544 | static int | |
545 | wakeup_down(struct thread *t_wakeup) | |
546 | { | |
547 | struct daemon *dmn = THREAD_ARG(t_wakeup); | |
548 | ||
549 | dmn->t_wakeup = NULL; | |
550 | if (try_connect(dmn) < 0) | |
551 | SET_WAKEUP_DOWN(dmn); | |
552 | if ((dmn->connect_tries > 1) && (dmn->state != DAEMON_UP)) | |
553 | try_restart(dmn); | |
554 | return 0; | |
555 | } | |
556 | ||
557 | static int | |
558 | wakeup_init(struct thread *t_wakeup) | |
559 | { | |
560 | struct daemon *dmn = THREAD_ARG(t_wakeup); | |
561 | ||
562 | dmn->t_wakeup = NULL; | |
563 | if (try_connect(dmn) < 0) | |
564 | { | |
565 | SET_WAKEUP_DOWN(dmn); | |
566 | zlog_err("%s state -> down : initial connection attempt failed", | |
567 | dmn->name); | |
568 | dmn->state = DAEMON_DOWN; | |
569 | } | |
570 | return 0; | |
571 | } | |
572 | ||
573 | static void | |
574 | daemon_down(struct daemon *dmn, const char *why) | |
575 | { | |
576 | if (IS_UP(dmn) || (dmn->state == DAEMON_INIT)) | |
577 | zlog_err("%s state -> down : %s",dmn->name,why); | |
578 | else if (gs.loglevel > LOG_DEBUG) | |
579 | zlog_debug("%s still down : %s",dmn->name,why); | |
580 | if (IS_UP(dmn)) | |
581 | gs.numdown++; | |
582 | dmn->state = DAEMON_DOWN; | |
583 | if (dmn->fd >= 0) | |
584 | { | |
585 | close(dmn->fd); | |
586 | dmn->fd = -1; | |
587 | } | |
588 | THREAD_OFF(dmn->t_read); | |
589 | THREAD_OFF(dmn->t_write); | |
590 | THREAD_OFF(dmn->t_wakeup); | |
591 | if (try_connect(dmn) < 0) | |
592 | SET_WAKEUP_DOWN(dmn); | |
593 | phase_check(); | |
594 | } | |
595 | ||
596 | static int | |
597 | handle_read(struct thread *t_read) | |
598 | { | |
599 | struct daemon *dmn = THREAD_ARG(t_read); | |
600 | static const char resp[sizeof(PING_TOKEN)+4] = PING_TOKEN "\n"; | |
601 | char buf[sizeof(resp)+100]; | |
602 | ssize_t rc; | |
603 | struct timeval delay; | |
604 | ||
605 | dmn->t_read = NULL; | |
606 | if ((rc = read(dmn->fd,buf,sizeof(buf))) < 0) | |
607 | { | |
608 | char why[100]; | |
609 | ||
518cde8d | 610 | if (ERRNO_IO_RETRY(errno)) |
8b886ca7 | 611 | { |
612 | /* Pretend it never happened. */ | |
613 | SET_READ_HANDLER(dmn); | |
614 | return 0; | |
615 | } | |
616 | snprintf(why,sizeof(why),"unexpected read error: %s", | |
617 | safe_strerror(errno)); | |
618 | daemon_down(dmn,why); | |
619 | return 0; | |
620 | } | |
621 | if (rc == 0) | |
622 | { | |
623 | daemon_down(dmn,"read returned EOF"); | |
624 | return 0; | |
625 | } | |
626 | if (!dmn->echo_sent.tv_sec) | |
627 | { | |
628 | char why[sizeof(buf)+100]; | |
098e240f | 629 | snprintf(why,sizeof(why),"unexpected read returns %d bytes: %.*s", |
630 | (int)rc,(int)rc,buf); | |
8b886ca7 | 631 | daemon_down(dmn,why); |
632 | return 0; | |
633 | } | |
634 | ||
635 | /* We are expecting an echo response: is there any chance that the | |
636 | response would not be returned entirely in the first read? That | |
637 | seems inconceivable... */ | |
638 | if ((rc != sizeof(resp)) || memcmp(buf,resp,sizeof(resp))) | |
639 | { | |
640 | char why[100+sizeof(buf)]; | |
098e240f | 641 | snprintf(why,sizeof(why),"read returned bad echo response of %d bytes " |
642 | "(expecting %u): %.*s", | |
643 | (int)rc,(u_int)sizeof(resp),(int)rc,buf); | |
8b886ca7 | 644 | daemon_down(dmn,why); |
645 | return 0; | |
646 | } | |
647 | ||
648 | time_elapsed(&delay,&dmn->echo_sent); | |
649 | dmn->echo_sent.tv_sec = 0; | |
650 | if (dmn->state == DAEMON_UNRESPONSIVE) | |
651 | { | |
652 | if (delay.tv_sec < gs.timeout) | |
653 | { | |
654 | dmn->state = DAEMON_UP; | |
655 | zlog_warn("%s state -> up : echo response received after %ld.%06ld " | |
656 | "seconds", dmn->name,delay.tv_sec,delay.tv_usec); | |
657 | } | |
658 | else | |
659 | zlog_warn("%s: slow echo response finally received after %ld.%06ld " | |
660 | "seconds", dmn->name,delay.tv_sec,delay.tv_usec); | |
661 | } | |
662 | else if (gs.loglevel > LOG_DEBUG+1) | |
663 | zlog_debug("%s: echo response received after %ld.%06ld seconds", | |
664 | dmn->name,delay.tv_sec,delay.tv_usec); | |
665 | ||
666 | SET_READ_HANDLER(dmn); | |
667 | if (dmn->t_wakeup) | |
668 | thread_cancel(dmn->t_wakeup); | |
669 | SET_WAKEUP_ECHO(dmn); | |
670 | ||
671 | return 0; | |
672 | } | |
673 | ||
674 | static void | |
675 | daemon_up(struct daemon *dmn, const char *why) | |
676 | { | |
677 | dmn->state = DAEMON_UP; | |
678 | gs.numdown--; | |
679 | dmn->connect_tries = 0; | |
680 | zlog_notice("%s state -> up : %s",dmn->name,why); | |
681 | if (gs.do_ping) | |
682 | SET_WAKEUP_ECHO(dmn); | |
683 | phase_check(); | |
684 | } | |
685 | ||
686 | static int | |
687 | check_connect(struct thread *t_write) | |
688 | { | |
689 | struct daemon *dmn = THREAD_ARG(t_write); | |
690 | int sockerr; | |
691 | socklen_t reslen = sizeof(sockerr); | |
692 | ||
693 | dmn->t_write = NULL; | |
694 | if (getsockopt(dmn->fd,SOL_SOCKET,SO_ERROR,(char *)&sockerr,&reslen) < 0) | |
695 | { | |
696 | zlog_warn("%s: check_connect: getsockopt failed: %s", | |
697 | dmn->name,safe_strerror(errno)); | |
698 | daemon_down(dmn,"getsockopt failed checking connection success"); | |
699 | return 0; | |
700 | } | |
701 | if ((reslen == sizeof(sockerr)) && sockerr) | |
702 | { | |
703 | char why[100]; | |
704 | snprintf(why,sizeof(why), | |
705 | "getsockopt reports that connection attempt failed: %s", | |
706 | safe_strerror(sockerr)); | |
707 | daemon_down(dmn,why); | |
708 | return 0; | |
709 | } | |
710 | ||
711 | daemon_up(dmn,"delayed connect succeeded"); | |
712 | return 0; | |
713 | } | |
714 | ||
715 | static int | |
716 | wakeup_connect_hanging(struct thread *t_wakeup) | |
717 | { | |
718 | struct daemon *dmn = THREAD_ARG(t_wakeup); | |
719 | char why[100]; | |
720 | ||
721 | dmn->t_wakeup = NULL; | |
722 | snprintf(why,sizeof(why),"connection attempt timed out after %ld seconds", | |
723 | gs.timeout); | |
724 | daemon_down(dmn,why); | |
725 | return 0; | |
726 | } | |
727 | ||
728 | /* Making connection to protocol daemon. */ | |
729 | static int | |
730 | try_connect(struct daemon *dmn) | |
731 | { | |
732 | int sock; | |
733 | struct sockaddr_un addr; | |
734 | socklen_t len; | |
8b886ca7 | 735 | |
736 | if (gs.loglevel > LOG_DEBUG+1) | |
737 | zlog_debug("%s: attempting to connect",dmn->name); | |
738 | dmn->connect_tries++; | |
739 | ||
740 | memset (&addr, 0, sizeof (struct sockaddr_un)); | |
741 | addr.sun_family = AF_UNIX; | |
742 | snprintf(addr.sun_path, sizeof(addr.sun_path), "%s/%s.vty", | |
743 | gs.vtydir,dmn->name); | |
6f0e3f6e | 744 | #ifdef HAVE_STRUCT_SOCKADDR_UN_SUN_LEN |
8b886ca7 | 745 | len = addr.sun_len = SUN_LEN(&addr); |
746 | #else | |
747 | len = sizeof (addr.sun_family) + strlen (addr.sun_path); | |
6f0e3f6e | 748 | #endif /* HAVE_STRUCT_SOCKADDR_UN_SUN_LEN */ |
8b886ca7 | 749 | |
750 | /* Quick check to see if we might succeed before we go to the trouble | |
751 | of creating a socket. */ | |
752 | if (access(addr.sun_path, W_OK) < 0) | |
753 | { | |
754 | if (errno != ENOENT) | |
755 | zlog_err("%s: access to socket %s denied: %s", | |
756 | dmn->name,addr.sun_path,safe_strerror(errno)); | |
757 | return -1; | |
758 | } | |
759 | ||
760 | if ((sock = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) | |
761 | { | |
762 | zlog_err("%s(%s): cannot make socket: %s", | |
763 | __func__,addr.sun_path, safe_strerror(errno)); | |
764 | return -1; | |
765 | } | |
766 | ||
52e66296 | 767 | if (set_nonblocking(sock) < 0) |
8b886ca7 | 768 | { |
52e66296 | 769 | zlog_err("%s(%s): set_nonblocking(%d) failed", |
770 | __func__, addr.sun_path, sock); | |
8b886ca7 | 771 | close(sock); |
772 | return -1; | |
773 | } | |
774 | ||
775 | if (connect (sock, (struct sockaddr *) &addr, len) < 0) | |
776 | { | |
777 | if ((errno != EINPROGRESS) && (errno != EWOULDBLOCK)) | |
778 | { | |
779 | if (gs.loglevel > LOG_DEBUG) | |
780 | zlog_debug("%s(%s): connect failed: %s", | |
781 | __func__,addr.sun_path, safe_strerror(errno)); | |
782 | close (sock); | |
783 | return -1; | |
784 | } | |
785 | if (gs.loglevel > LOG_DEBUG) | |
786 | zlog_debug("%s: connection in progress",dmn->name); | |
787 | dmn->state = DAEMON_CONNECTING; | |
788 | dmn->fd = sock; | |
789 | dmn->t_write = thread_add_write(master,check_connect,dmn,dmn->fd); | |
790 | dmn->t_wakeup = thread_add_timer(master,wakeup_connect_hanging,dmn, | |
791 | gs.timeout); | |
792 | SET_READ_HANDLER(dmn); | |
793 | return 0; | |
794 | } | |
795 | ||
796 | dmn->fd = sock; | |
797 | SET_READ_HANDLER(dmn); | |
798 | daemon_up(dmn,"connect succeeded"); | |
799 | return 1; | |
800 | } | |
801 | ||
802 | static int | |
803 | phase_hanging(struct thread *t_hanging) | |
804 | { | |
805 | gs.t_phase_hanging = NULL; | |
806 | zlog_err("Phase [%s] hanging for %ld seconds, aborting phased restart", | |
807 | phase_str[gs.phase],PHASE_TIMEOUT); | |
808 | gs.phase = PHASE_NONE; | |
809 | return 0; | |
810 | } | |
811 | ||
812 | static void | |
813 | set_phase(restart_phase_t new_phase) | |
814 | { | |
815 | gs.phase = new_phase; | |
816 | if (gs.t_phase_hanging) | |
817 | thread_cancel(gs.t_phase_hanging); | |
818 | gs.t_phase_hanging = thread_add_timer(master,phase_hanging,NULL, | |
819 | PHASE_TIMEOUT); | |
820 | } | |
821 | ||
822 | static void | |
823 | phase_check(void) | |
824 | { | |
825 | switch (gs.phase) | |
826 | { | |
827 | case PHASE_NONE: | |
828 | break; | |
829 | case PHASE_STOPS_PENDING: | |
830 | if (gs.numpids) | |
831 | break; | |
832 | zlog_info("Phased restart: all routing daemon stop jobs have completed."); | |
833 | set_phase(PHASE_WAITING_DOWN); | |
834 | /*FALLTHRU*/ | |
835 | case PHASE_WAITING_DOWN: | |
836 | if (gs.numdown+IS_UP(gs.special) < gs.numdaemons) | |
837 | break; | |
838 | zlog_info("Phased restart: all routing daemons now down."); | |
839 | run_job(&gs.special->restart,"restart",gs.restart_command,1,1); | |
840 | set_phase(PHASE_ZEBRA_RESTART_PENDING); | |
841 | /*FALLTHRU*/ | |
842 | case PHASE_ZEBRA_RESTART_PENDING: | |
843 | if (gs.special->restart.pid) | |
844 | break; | |
845 | zlog_info("Phased restart: %s restart job completed.",gs.special->name); | |
846 | set_phase(PHASE_WAITING_ZEBRA_UP); | |
847 | /*FALLTHRU*/ | |
848 | case PHASE_WAITING_ZEBRA_UP: | |
849 | if (!IS_UP(gs.special)) | |
850 | break; | |
851 | zlog_info("Phased restart: %s is now up.",gs.special->name); | |
852 | { | |
853 | struct daemon *dmn; | |
854 | for (dmn = gs.daemons; dmn; dmn = dmn->next) | |
855 | { | |
856 | if (dmn != gs.special) | |
a8a8ddcd | 857 | run_job(&dmn->restart,"start",gs.start_command,1,0); |
8b886ca7 | 858 | } |
859 | } | |
860 | gs.phase = PHASE_NONE; | |
861 | THREAD_OFF(gs.t_phase_hanging); | |
862 | zlog_notice("Phased global restart has completed."); | |
863 | break; | |
864 | } | |
865 | } | |
866 | ||
867 | static void | |
868 | try_restart(struct daemon *dmn) | |
869 | { | |
870 | switch (gs.mode) | |
871 | { | |
872 | case MODE_MONITOR: | |
873 | return; | |
874 | case MODE_GLOBAL_RESTART: | |
875 | run_job(&gs.restart,"restart",gs.restart_command,0,1); | |
876 | break; | |
877 | case MODE_SEPARATE_RESTART: | |
878 | run_job(&dmn->restart,"restart",gs.restart_command,0,1); | |
879 | break; | |
880 | case MODE_PHASED_ZEBRA_RESTART: | |
881 | if (dmn != gs.special) | |
882 | { | |
883 | if ((gs.special->state == DAEMON_UP) && (gs.phase == PHASE_NONE)) | |
884 | run_job(&dmn->restart,"restart",gs.restart_command,0,1); | |
885 | else | |
886 | zlog_debug("%s: postponing restart attempt because master %s daemon " | |
887 | "not up [%s], or phased restart in progress", | |
888 | dmn->name,gs.special->name,state_str[gs.special->state]); | |
889 | break; | |
890 | } | |
891 | /*FALLTHRU*/ | |
892 | case MODE_PHASED_ALL_RESTART: | |
893 | if ((gs.phase != PHASE_NONE) || gs.numpids) | |
894 | { | |
895 | if (gs.loglevel > LOG_DEBUG+1) | |
896 | zlog_debug("postponing phased global restart: restart already in " | |
897 | "progress [%s], or outstanding child processes [%d]", | |
898 | phase_str[gs.phase],gs.numpids); | |
899 | break; | |
900 | } | |
901 | /* Is it too soon for a restart? */ | |
902 | { | |
903 | struct timeval delay; | |
904 | if (time_elapsed(&delay,&gs.special->restart.time)->tv_sec < | |
905 | gs.special->restart.interval) | |
906 | { | |
907 | if (gs.loglevel > LOG_DEBUG+1) | |
908 | zlog_debug("postponing phased global restart: " | |
909 | "elapsed time %ld < retry interval %ld", | |
910 | (long)delay.tv_sec,gs.special->restart.interval); | |
911 | break; | |
912 | } | |
913 | } | |
914 | zlog_info("Phased restart: stopping all routing daemons."); | |
915 | /* First step: stop all other daemons. */ | |
916 | for (dmn = gs.daemons; dmn; dmn = dmn->next) | |
917 | { | |
918 | if (dmn != gs.special) | |
a8a8ddcd | 919 | run_job(&dmn->restart,"stop",gs.stop_command,1,1); |
8b886ca7 | 920 | } |
921 | set_phase(PHASE_STOPS_PENDING); | |
922 | break; | |
923 | default: | |
924 | zlog_err("error: unknown restart mode %d",gs.mode); | |
925 | break; | |
926 | } | |
927 | } | |
928 | ||
929 | static int | |
930 | wakeup_unresponsive(struct thread *t_wakeup) | |
931 | { | |
932 | struct daemon *dmn = THREAD_ARG(t_wakeup); | |
933 | ||
934 | dmn->t_wakeup = NULL; | |
935 | if (dmn->state != DAEMON_UNRESPONSIVE) | |
936 | zlog_err("%s: no longer unresponsive (now %s), " | |
937 | "wakeup should have been cancelled!", | |
938 | dmn->name,state_str[dmn->state]); | |
939 | else | |
940 | { | |
941 | SET_WAKEUP_UNRESPONSIVE(dmn); | |
942 | try_restart(dmn); | |
943 | } | |
944 | return 0; | |
945 | } | |
946 | ||
947 | static int | |
948 | wakeup_no_answer(struct thread *t_wakeup) | |
949 | { | |
950 | struct daemon *dmn = THREAD_ARG(t_wakeup); | |
951 | ||
952 | dmn->t_wakeup = NULL; | |
953 | dmn->state = DAEMON_UNRESPONSIVE; | |
954 | zlog_err("%s state -> unresponsive : no response yet to ping " | |
955 | "sent %ld seconds ago",dmn->name,gs.timeout); | |
956 | if (gs.unresponsive_restart) | |
957 | { | |
958 | SET_WAKEUP_UNRESPONSIVE(dmn); | |
959 | try_restart(dmn); | |
960 | } | |
961 | return 0; | |
962 | } | |
963 | ||
964 | static int | |
965 | wakeup_send_echo(struct thread *t_wakeup) | |
966 | { | |
967 | static const char echocmd[] = "echo " PING_TOKEN; | |
968 | ssize_t rc; | |
969 | struct daemon *dmn = THREAD_ARG(t_wakeup); | |
970 | ||
971 | dmn->t_wakeup = NULL; | |
972 | if (((rc = write(dmn->fd,echocmd,sizeof(echocmd))) < 0) || | |
973 | ((size_t)rc != sizeof(echocmd))) | |
974 | { | |
975 | char why[100+sizeof(echocmd)]; | |
098e240f | 976 | snprintf(why,sizeof(why),"write '%s' returned %d instead of %u", |
977 | echocmd,(int)rc,(u_int)sizeof(echocmd)); | |
8b886ca7 | 978 | daemon_down(dmn,why); |
979 | } | |
980 | else | |
981 | { | |
982 | gettimeofday(&dmn->echo_sent,NULL); | |
983 | dmn->t_wakeup = thread_add_timer(master,wakeup_no_answer,dmn,gs.timeout); | |
984 | } | |
985 | return 0; | |
986 | } | |
987 | ||
988 | static void | |
989 | sigint(void) | |
990 | { | |
991 | zlog_notice("Terminating on signal"); | |
992 | exit(0); | |
993 | } | |
994 | ||
995 | static int | |
996 | valid_command(const char *cmd) | |
997 | { | |
998 | char *p; | |
999 | ||
1000 | return ((p = strchr(cmd,'%')) != NULL) && (*(p+1) == 's') && !strchr(p+1,'%'); | |
1001 | } | |
1002 | ||
c8b40f86 | 1003 | /* This is an ugly hack to circumvent problems with passing command-line |
1004 | arguments that contain spaces. The fix is to use a configuration file. */ | |
1005 | static char * | |
1006 | translate_blanks(const char *cmd, const char *blankstr) | |
1007 | { | |
1008 | char *res; | |
1009 | char *p; | |
1010 | size_t bslen = strlen(blankstr); | |
1011 | ||
1012 | if (!(res = strdup(cmd))) | |
1013 | { | |
1014 | perror("strdup"); | |
1015 | exit(1); | |
1016 | } | |
1017 | while ((p = strstr(res,blankstr)) != NULL) | |
1018 | { | |
1019 | *p = ' '; | |
1020 | if (bslen != 1) | |
1021 | memmove(p+1,p+bslen,strlen(p+bslen)+1); | |
1022 | } | |
1023 | return res; | |
1024 | } | |
1025 | ||
8b886ca7 | 1026 | int |
1027 | main(int argc, char **argv) | |
1028 | { | |
1029 | const char *progname; | |
1030 | int opt; | |
1031 | int daemon_mode = 0; | |
1032 | const char *pidfile = DEFAULT_PIDFILE; | |
1033 | const char *special = "zebra"; | |
c8b40f86 | 1034 | const char *blankstr = NULL; |
8b886ca7 | 1035 | static struct quagga_signal_t my_signals[] = |
1036 | { | |
1037 | { | |
1038 | .signal = SIGINT, | |
1039 | .handler = sigint, | |
1040 | }, | |
1041 | { | |
1042 | .signal = SIGTERM, | |
1043 | .handler = sigint, | |
1044 | }, | |
1045 | { | |
1046 | .signal = SIGCHLD, | |
1047 | .handler = sigchild, | |
1048 | }, | |
1049 | }; | |
1050 | ||
1051 | if ((progname = strrchr (argv[0], '/')) != NULL) | |
1052 | progname++; | |
1053 | else | |
1054 | progname = argv[0]; | |
1055 | ||
098e240f | 1056 | gs.restart.name = "all"; |
c8b40f86 | 1057 | while ((opt = getopt_long(argc, argv, "aAb:dek:l:m:M:i:p:r:R:S:s:t:T:zvh", |
8b886ca7 | 1058 | longopts, 0)) != EOF) |
1059 | { | |
1060 | switch (opt) | |
1061 | { | |
1062 | case 0: | |
1063 | break; | |
1064 | case 'a': | |
1065 | if ((gs.mode != MODE_MONITOR) && (gs.mode != MODE_SEPARATE_RESTART)) | |
1066 | { | |
1067 | fputs("Ambiguous operating mode selected.\n",stderr); | |
1068 | return usage(progname,1); | |
1069 | } | |
1070 | gs.mode = MODE_PHASED_ZEBRA_RESTART; | |
1071 | break; | |
1072 | case 'A': | |
1073 | if ((gs.mode != MODE_MONITOR) && (gs.mode != MODE_SEPARATE_RESTART)) | |
1074 | { | |
1075 | fputs("Ambiguous operating mode selected.\n",stderr); | |
1076 | return usage(progname,1); | |
1077 | } | |
1078 | gs.mode = MODE_PHASED_ALL_RESTART; | |
1079 | break; | |
c8b40f86 | 1080 | case 'b': |
1081 | blankstr = optarg; | |
1082 | break; | |
8b886ca7 | 1083 | case 'd': |
1084 | daemon_mode = 1; | |
1085 | break; | |
1086 | case 'e': | |
1087 | gs.do_ping = 0; | |
1088 | break; | |
1089 | case 'k': | |
1090 | if (!valid_command(optarg)) | |
1091 | { | |
1092 | fprintf(stderr,"Invalid kill command, must contain '%%s': %s\n", | |
1093 | optarg); | |
1094 | return usage(progname,1); | |
1095 | } | |
1096 | gs.stop_command = optarg; | |
1097 | break; | |
1098 | case 'l': | |
1099 | { | |
1100 | char garbage[3]; | |
1101 | if ((sscanf(optarg,"%d%1s",&gs.loglevel,garbage) != 1) || | |
1102 | (gs.loglevel < LOG_EMERG)) | |
1103 | { | |
1104 | fprintf(stderr,"Invalid loglevel argument: %s\n",optarg); | |
1105 | return usage(progname,1); | |
1106 | } | |
1107 | } | |
1108 | break; | |
1109 | case 'm': | |
1110 | { | |
1111 | char garbage[3]; | |
1112 | if ((sscanf(optarg,"%ld%1s", | |
1113 | &gs.min_restart_interval,garbage) != 1) || | |
1114 | (gs.min_restart_interval < 0)) | |
1115 | { | |
1116 | fprintf(stderr,"Invalid min_restart_interval argument: %s\n", | |
1117 | optarg); | |
1118 | return usage(progname,1); | |
1119 | } | |
1120 | } | |
1121 | break; | |
1122 | case 'M': | |
1123 | { | |
1124 | char garbage[3]; | |
1125 | if ((sscanf(optarg,"%ld%1s", | |
1126 | &gs.max_restart_interval,garbage) != 1) || | |
1127 | (gs.max_restart_interval < 0)) | |
1128 | { | |
1129 | fprintf(stderr,"Invalid max_restart_interval argument: %s\n", | |
1130 | optarg); | |
1131 | return usage(progname,1); | |
1132 | } | |
1133 | } | |
1134 | break; | |
1135 | case 'i': | |
1136 | { | |
1137 | char garbage[3]; | |
1138 | int period; | |
1139 | if ((sscanf(optarg,"%d%1s",&period,garbage) != 1) || | |
1140 | (gs.period < 1)) | |
1141 | { | |
1142 | fprintf(stderr,"Invalid interval argument: %s\n",optarg); | |
1143 | return usage(progname,1); | |
1144 | } | |
1145 | gs.period = 1000*period; | |
1146 | } | |
1147 | break; | |
1148 | case 'p': | |
1149 | pidfile = optarg; | |
1150 | break; | |
1151 | case 'r': | |
1152 | if ((gs.mode == MODE_GLOBAL_RESTART) || | |
1153 | (gs.mode == MODE_SEPARATE_RESTART)) | |
1154 | { | |
1155 | fputs("Ambiguous operating mode selected.\n",stderr); | |
1156 | return usage(progname,1); | |
1157 | } | |
1158 | if (!valid_command(optarg)) | |
1159 | { | |
1160 | fprintf(stderr, | |
1161 | "Invalid restart command, must contain '%%s': %s\n", | |
1162 | optarg); | |
1163 | return usage(progname,1); | |
1164 | } | |
1165 | gs.restart_command = optarg; | |
1166 | if (gs.mode == MODE_MONITOR) | |
1167 | gs.mode = MODE_SEPARATE_RESTART; | |
1168 | break; | |
1169 | case 'R': | |
1170 | if (gs.mode != MODE_MONITOR) | |
1171 | { | |
1172 | fputs("Ambiguous operating mode selected.\n",stderr); | |
1173 | return usage(progname,1); | |
1174 | } | |
1175 | if (strchr(optarg,'%')) | |
1176 | { | |
1177 | fprintf(stderr, | |
1178 | "Invalid restart-all arg, must not contain '%%s': %s\n", | |
1179 | optarg); | |
1180 | return usage(progname,1); | |
1181 | } | |
1182 | gs.restart_command = optarg; | |
1183 | gs.mode = MODE_GLOBAL_RESTART; | |
1184 | break; | |
1185 | case 's': | |
1186 | if (!valid_command(optarg)) | |
1187 | { | |
1188 | fprintf(stderr,"Invalid start command, must contain '%%s': %s\n", | |
1189 | optarg); | |
1190 | return usage(progname,1); | |
1191 | } | |
1192 | gs.start_command = optarg; | |
1193 | break; | |
1194 | case 'S': | |
1195 | gs.vtydir = optarg; | |
1196 | break; | |
1197 | case 't': | |
1198 | { | |
1199 | char garbage[3]; | |
1200 | if ((sscanf(optarg,"%ld%1s",&gs.timeout,garbage) != 1) || | |
1201 | (gs.timeout < 1)) | |
1202 | { | |
1203 | fprintf(stderr,"Invalid timeout argument: %s\n",optarg); | |
1204 | return usage(progname,1); | |
1205 | } | |
1206 | } | |
1207 | break; | |
1208 | case 'T': | |
1209 | { | |
1210 | char garbage[3]; | |
1211 | if ((sscanf(optarg,"%ld%1s",&gs.restart_timeout,garbage) != 1) || | |
1212 | (gs.restart_timeout < 1)) | |
1213 | { | |
1214 | fprintf(stderr,"Invalid restart timeout argument: %s\n",optarg); | |
1215 | return usage(progname,1); | |
1216 | } | |
1217 | } | |
1218 | break; | |
1219 | case 'z': | |
1220 | gs.unresponsive_restart = 1; | |
1221 | break; | |
1222 | case 'v': | |
1223 | printf ("%s version %s\n", progname, QUAGGA_VERSION); | |
1224 | puts("Copyright 2004 Andrew J. Schorr"); | |
1225 | return 0; | |
1226 | case 'h': | |
1227 | return usage(progname,0); | |
1228 | default: | |
1229 | fputs("Invalid option.\n",stderr); | |
1230 | return usage(progname,1); | |
1231 | } | |
1232 | } | |
1233 | ||
1234 | if (gs.unresponsive_restart && (gs.mode == MODE_MONITOR)) | |
1235 | { | |
1236 | fputs("Option -z requires a -r or -R restart option.\n",stderr); | |
1237 | return usage(progname,1); | |
1238 | } | |
1239 | switch (gs.mode) | |
1240 | { | |
1241 | case MODE_MONITOR: | |
1242 | if (gs.restart_command || gs.start_command || gs.stop_command) | |
1243 | { | |
1244 | fprintf(stderr,"No kill/(re)start commands needed for %s mode.\n", | |
1245 | mode_str[gs.mode]); | |
1246 | return usage(progname,1); | |
1247 | } | |
1248 | break; | |
1249 | case MODE_GLOBAL_RESTART: | |
1250 | case MODE_SEPARATE_RESTART: | |
1251 | if (!gs.restart_command || gs.start_command || gs.stop_command) | |
1252 | { | |
1253 | fprintf(stderr,"No start/kill commands needed in [%s] mode.\n", | |
1254 | mode_str[gs.mode]); | |
1255 | return usage(progname,1); | |
1256 | } | |
1257 | break; | |
1258 | case MODE_PHASED_ZEBRA_RESTART: | |
1259 | case MODE_PHASED_ALL_RESTART: | |
1260 | if (!gs.restart_command || !gs.start_command || !gs.stop_command) | |
1261 | { | |
1262 | fprintf(stderr, | |
1263 | "Need start, kill, and restart commands in [%s] mode.\n", | |
1264 | mode_str[gs.mode]); | |
1265 | return usage(progname,1); | |
1266 | } | |
1267 | break; | |
1268 | } | |
1269 | ||
c8b40f86 | 1270 | if (blankstr) |
1271 | { | |
1272 | if (gs.restart_command) | |
1273 | gs.restart_command = translate_blanks(gs.restart_command,blankstr); | |
1274 | if (gs.start_command) | |
1275 | gs.start_command = translate_blanks(gs.start_command,blankstr); | |
1276 | if (gs.stop_command) | |
1277 | gs.stop_command = translate_blanks(gs.stop_command,blankstr); | |
1278 | } | |
1279 | ||
8b886ca7 | 1280 | gs.restart.interval = gs.min_restart_interval; |
1281 | master = thread_master_create(); | |
1282 | signal_init (master, Q_SIGC(my_signals), my_signals); | |
1283 | srandom(time(NULL)); | |
1284 | ||
1285 | { | |
1286 | int i; | |
1287 | struct daemon *tail = NULL; | |
1288 | ||
1289 | for (i = optind; i < argc; i++) | |
1290 | { | |
1291 | struct daemon *dmn; | |
1292 | ||
1293 | if (!(dmn = (struct daemon *)calloc(1,sizeof(*dmn)))) | |
1294 | { | |
098e240f | 1295 | fprintf(stderr,"calloc(1,%u) failed: %s\n", |
1296 | (u_int)sizeof(*dmn), safe_strerror(errno)); | |
8b886ca7 | 1297 | return 1; |
1298 | } | |
1299 | dmn->name = dmn->restart.name = argv[i]; | |
1300 | dmn->state = DAEMON_INIT; | |
1301 | gs.numdaemons++; | |
1302 | gs.numdown++; | |
1303 | dmn->fd = -1; | |
1304 | dmn->t_wakeup = thread_add_timer_msec(master,wakeup_init,dmn, | |
1305 | 100+(random() % 900)); | |
1306 | dmn->restart.interval = gs.min_restart_interval; | |
1307 | if (tail) | |
1308 | tail->next = dmn; | |
1309 | else | |
1310 | gs.daemons = dmn; | |
1311 | tail = dmn; | |
1312 | ||
1313 | if (((gs.mode == MODE_PHASED_ZEBRA_RESTART) || | |
1314 | (gs.mode == MODE_PHASED_ALL_RESTART)) && | |
1315 | !strcmp(dmn->name,special)) | |
1316 | gs.special = dmn; | |
1317 | } | |
1318 | } | |
1319 | if (!gs.daemons) | |
1320 | { | |
1321 | fputs("Must specify one or more daemons to monitor.\n",stderr); | |
1322 | return usage(progname,1); | |
1323 | } | |
1324 | if (((gs.mode == MODE_PHASED_ZEBRA_RESTART) || | |
1325 | (gs.mode == MODE_PHASED_ALL_RESTART)) && !gs.special) | |
1326 | { | |
1327 | fprintf(stderr,"In mode [%s], but cannot find master daemon %s\n", | |
1328 | mode_str[gs.mode],special); | |
1329 | return usage(progname,1); | |
1330 | } | |
1331 | if (gs.special && (gs.numdaemons < 2)) | |
1332 | { | |
1333 | fprintf(stderr,"Mode [%s] does not make sense with only 1 daemon " | |
1334 | "to watch.\n",mode_str[gs.mode]); | |
1335 | return usage(progname,1); | |
1336 | } | |
1337 | ||
1338 | zlog_default = openzlog(progname, ZLOG_NONE, | |
1339 | LOG_CONS|LOG_NDELAY|LOG_PID, LOG_DAEMON); | |
1340 | zlog_set_level(NULL, ZLOG_DEST_MONITOR, ZLOG_DISABLED); | |
1341 | if (daemon_mode) | |
1342 | { | |
1343 | zlog_set_level(NULL, ZLOG_DEST_SYSLOG, MIN(gs.loglevel,LOG_DEBUG)); | |
065de903 SH |
1344 | if (daemon (0, 0) < 0) |
1345 | { | |
1346 | fprintf(stderr, "Watchquagga daemon failed: %s", strerror(errno)); | |
1347 | exit (1); | |
1348 | } | |
8b886ca7 | 1349 | } |
1350 | else | |
1351 | zlog_set_level(NULL, ZLOG_DEST_STDOUT, MIN(gs.loglevel,LOG_DEBUG)); | |
1352 | ||
1353 | /* Make sure we're not already running. */ | |
1354 | pid_output (pidfile); | |
1355 | ||
1356 | /* Announce which daemons are being monitored. */ | |
1357 | { | |
1358 | struct daemon *dmn; | |
1359 | size_t len = 0; | |
1360 | ||
1361 | for (dmn = gs.daemons; dmn; dmn = dmn->next) | |
1362 | len += strlen(dmn->name)+1; | |
1363 | ||
1364 | { | |
1365 | char buf[len+1]; | |
1366 | char *p = buf; | |
1367 | ||
1368 | for (dmn = gs.daemons; dmn; dmn = dmn->next) | |
1369 | { | |
1370 | if (p != buf) | |
1371 | *p++ = ' '; | |
1372 | strcpy(p,dmn->name); | |
1373 | p += strlen(p); | |
1374 | } | |
1375 | zlog_notice("%s %s watching [%s], mode [%s]", | |
1376 | progname, QUAGGA_VERSION, buf, mode_str[gs.mode]); | |
1377 | } | |
1378 | } | |
1379 | ||
1380 | { | |
1381 | struct thread thread; | |
1382 | ||
1383 | while (thread_fetch (master, &thread)) | |
1384 | thread_call (&thread); | |
1385 | } | |
1386 | ||
1387 | /* Not reached. */ | |
1388 | return 0; | |
1389 | } |