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8b886ca7 | 1 | /* |
c8b40f86 | 2 | $Id: watchquagga.c,v 1.4 2004/12/22 16:17:16 ajs Exp $ |
8b886ca7 | 3 | |
4 | Monitor status of quagga daemons and restart if necessary. | |
5 | ||
6 | Copyright (C) 2004 Andrew J. Schorr | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | */ | |
22 | ||
23 | /* System headers: */ | |
24 | #include <sys/types.h> | |
25 | #include <sys/socket.h> | |
26 | #include <sys/un.h> | |
27 | #include <unistd.h> | |
28 | #include <stdlib.h> | |
29 | #include <stdio.h> | |
30 | #include <signal.h> | |
31 | #include <fcntl.h> | |
32 | #include <errno.h> | |
33 | #include <time.h> | |
34 | #include <sys/time.h> | |
35 | #include <sys/wait.h> | |
36 | ||
37 | /* Quagga headers: */ | |
6028df52 | 38 | #ifdef HAVE_CONFIG_H |
39 | #include "config.h" | |
40 | #endif | |
41 | ||
8b886ca7 | 42 | #include <thread.h> |
43 | #include <log.h> | |
44 | #include <sigevent.h> | |
45 | #include <version.h> | |
46 | ||
47 | #ifndef MIN | |
48 | #define MIN(X,Y) (((X) <= (Y)) ? (X) : (Y)) | |
49 | #endif | |
50 | ||
51 | /* Macros to help randomize timers. */ | |
52 | #define JITTER(X) ((random() % ((X)+1))-((X)/2)) | |
53 | #define FUZZY(X) ((X)+JITTER((X)/20)) | |
54 | ||
55 | #define DEFAULT_PERIOD 5 | |
56 | #define DEFAULT_TIMEOUT 10 | |
57 | #define DEFAULT_RESTART_TIMEOUT 20 | |
58 | #define DEFAULT_LOGLEVEL LOG_INFO | |
59 | #define DEFAULT_MIN_RESTART 60 | |
60 | #define DEFAULT_MAX_RESTART 600 | |
6028df52 | 61 | #ifdef PATH_WATCHQUAGGA_PID |
62 | #define DEFAULT_PIDFILE PATH_WATCHQUAGGA_PID | |
63 | #else | |
8b886ca7 | 64 | #define DEFAULT_PIDFILE STATEDIR "/watchquagga.pid" |
6028df52 | 65 | #endif |
16f6511e | 66 | #ifdef DAEMON_VTY_DIR |
67 | #define VTYDIR DAEMON_VTY_DIR | |
68 | #else | |
69 | #define VTYDIR STATEDIR | |
70 | #endif | |
8b886ca7 | 71 | |
72 | #define PING_TOKEN "PING" | |
73 | ||
74 | /* Needs to be global, referenced somewhere inside libzebra. */ | |
75 | struct thread_master *master; | |
76 | ||
77 | typedef enum | |
78 | { | |
79 | MODE_MONITOR = 0, | |
80 | MODE_GLOBAL_RESTART, | |
81 | MODE_SEPARATE_RESTART, | |
82 | MODE_PHASED_ZEBRA_RESTART, | |
83 | MODE_PHASED_ALL_RESTART | |
84 | } watch_mode_t; | |
85 | ||
86 | static const char *mode_str[] = | |
87 | { | |
88 | "monitor", | |
89 | "global restart", | |
90 | "individual daemon restart", | |
91 | "phased zebra restart", | |
92 | "phased global restart for any failure", | |
93 | }; | |
94 | ||
95 | typedef enum | |
96 | { | |
97 | PHASE_NONE = 0, | |
98 | PHASE_STOPS_PENDING, | |
99 | PHASE_WAITING_DOWN, | |
100 | PHASE_ZEBRA_RESTART_PENDING, | |
101 | PHASE_WAITING_ZEBRA_UP | |
102 | } restart_phase_t; | |
103 | ||
104 | static const char *phase_str[] = | |
105 | { | |
106 | "None", | |
107 | "Stop jobs running", | |
108 | "Waiting for other daemons to come down", | |
109 | "Zebra restart job running", | |
110 | "Waiting for zebra to come up", | |
111 | "Start jobs running", | |
112 | }; | |
113 | ||
114 | #define PHASE_TIMEOUT (3*gs.restart_timeout) | |
115 | ||
116 | static struct global_state { | |
117 | watch_mode_t mode; | |
118 | restart_phase_t phase; | |
119 | struct thread *t_phase_hanging; | |
120 | const char *vtydir; | |
121 | long period; | |
122 | long timeout; | |
123 | long restart_timeout; | |
124 | long min_restart_interval; | |
125 | long max_restart_interval; | |
126 | int do_ping; | |
127 | struct daemon *daemons; | |
128 | const char *restart_command; | |
129 | const char *start_command; | |
130 | const char *stop_command; | |
131 | struct restart_info | |
132 | { | |
133 | const char *name; | |
134 | const char *what; | |
135 | pid_t pid; | |
136 | struct timeval time; | |
137 | long interval; | |
138 | struct thread *t_kill; | |
139 | int kills; | |
140 | } restart; | |
141 | int unresponsive_restart; | |
142 | int loglevel; | |
143 | struct daemon *special; /* points to zebra when doing phased restart */ | |
144 | int numdaemons; | |
145 | int numpids; | |
146 | int numdown; /* # of daemons that are not UP or UNRESPONSIVE */ | |
147 | } gs = { | |
148 | .mode = MODE_MONITOR, | |
149 | .phase = PHASE_NONE, | |
16f6511e | 150 | .vtydir = VTYDIR, |
8b886ca7 | 151 | .period = 1000*DEFAULT_PERIOD, |
152 | .timeout = DEFAULT_TIMEOUT, | |
153 | .restart_timeout = DEFAULT_RESTART_TIMEOUT, | |
154 | .loglevel = DEFAULT_LOGLEVEL, | |
155 | .min_restart_interval = DEFAULT_MIN_RESTART, | |
156 | .max_restart_interval = DEFAULT_MAX_RESTART, | |
157 | .do_ping = 1, | |
158 | .restart.name = "all", | |
159 | }; | |
160 | ||
161 | typedef enum | |
162 | { | |
163 | DAEMON_INIT, | |
164 | DAEMON_DOWN, | |
165 | DAEMON_CONNECTING, | |
166 | DAEMON_UP, | |
167 | DAEMON_UNRESPONSIVE | |
168 | } daemon_state_t; | |
169 | ||
170 | #define IS_UP(DMN) \ | |
171 | (((DMN)->state == DAEMON_UP) || ((DMN)->state == DAEMON_UNRESPONSIVE)) | |
172 | ||
173 | static const char *state_str[] = | |
174 | { | |
175 | "Init", | |
176 | "Down", | |
177 | "Connecting", | |
178 | "Up", | |
179 | "Unresponsive", | |
180 | }; | |
181 | ||
182 | struct daemon { | |
183 | const char *name; | |
184 | daemon_state_t state; | |
185 | int fd; | |
186 | struct timeval echo_sent; | |
187 | u_int connect_tries; | |
188 | struct thread *t_wakeup; | |
189 | struct thread *t_read; | |
190 | struct thread *t_write; | |
191 | struct daemon *next; | |
192 | struct restart_info restart; | |
193 | }; | |
194 | ||
195 | static const struct option longopts[] = | |
196 | { | |
197 | { "daemon", no_argument, NULL, 'd'}, | |
198 | { "statedir", required_argument, NULL, 'S'}, | |
199 | { "no-echo", no_argument, NULL, 'e'}, | |
200 | { "loglevel", required_argument, NULL, 'l'}, | |
201 | { "interval", required_argument, NULL, 'i'}, | |
202 | { "timeout", required_argument, NULL, 't'}, | |
203 | { "restart-timeout", required_argument, NULL, 'T'}, | |
204 | { "restart", required_argument, NULL, 'r'}, | |
205 | { "start-command", required_argument, NULL, 's'}, | |
206 | { "kill-command", required_argument, NULL, 'k'}, | |
207 | { "restart-all", required_argument, NULL, 'R'}, | |
208 | { "all-restart", no_argument, NULL, 'a'}, | |
209 | { "always-all-restart", no_argument, NULL, 'A'}, | |
210 | { "unresponsive-restart", no_argument, NULL, 'z'}, | |
211 | { "min-restart-interval", required_argument, NULL, 'm'}, | |
212 | { "max-restart-interval", required_argument, NULL, 'M'}, | |
213 | { "pid-file", required_argument, NULL, 'p'}, | |
c8b40f86 | 214 | { "blank-string", required_argument, NULL, 'b'}, |
8b886ca7 | 215 | { "help", no_argument, NULL, 'h'}, |
216 | { "version", no_argument, NULL, 'v'}, | |
217 | { NULL, 0, NULL, 0 } | |
218 | }; | |
219 | ||
220 | static int try_connect(struct daemon *dmn); | |
221 | static int wakeup_send_echo(struct thread *t_wakeup); | |
222 | static void try_restart(struct daemon *dmn); | |
223 | static void phase_check(void); | |
224 | ||
225 | static int | |
226 | usage(const char *progname, int status) | |
227 | { | |
228 | if (status != 0) | |
229 | fprintf(stderr, "Try `%s --help' for more information.\n", progname); | |
230 | else | |
231 | printf("Usage : %s [OPTION...] <daemon name> ...\n\n\ | |
232 | Watchdog program to monitor status of quagga daemons and try to restart\n\ | |
233 | them if they are down or unresponsive. It determines whether a daemon is\n\ | |
234 | up based on whether it can connect to the daemon's vty unix stream socket.\n\ | |
235 | It then repeatedly sends echo commands over that socket to determine whether\n\ | |
236 | the daemon is responsive. If the daemon crashes, we will receive an EOF\n\ | |
237 | on the socket connection and know immediately that the daemon is down.\n\n\ | |
238 | The daemons to be monitored should be listed on the command line.\n\n\ | |
239 | This program can run in one of 5 modes:\n\n\ | |
240 | 0. Mode: %s.\n\ | |
241 | Just monitor and report on status changes. Example:\n\ | |
242 | %s -d zebra ospfd bgpd\n\n\ | |
243 | 1. Mode: %s.\n\ | |
244 | Whenever any daemon hangs or crashes, use the given command to restart\n\ | |
245 | them all. Example:\n\ | |
246 | %s -dz \\\n\ | |
247 | -R '/sbin/service zebra restart; /sbin/service ospfd restart' \\\n\ | |
248 | zebra ospfd\n\n\ | |
249 | 2. Mode: %s.\n\ | |
250 | When any single daemon hangs or crashes, restart only the daemon that's\n\ | |
251 | in trouble using the supplied restart command. Example:\n\ | |
252 | %s -dz -r '/sbin/service %%s restart' zebra ospfd bgpd\n\n\ | |
253 | 3. Mode: %s.\n\ | |
254 | The same as the previous mode, except that there is special treatment when\n\ | |
255 | the zebra daemon is in trouble. In that case, a phased restart approach\n\ | |
256 | is used: 1. stop all other daemons; 2. restart zebra; 3. start the other\n\ | |
257 | daemons. Example:\n\ | |
258 | %s -adz -r '/sbin/service %%s restart' \\\n\ | |
259 | -s '/sbin/service %%s start' \\\n\ | |
260 | -k '/sbin/service %%s stop' zebra ospfd bgpd\n\n\ | |
261 | 4. Mode: %s.\n\ | |
262 | This is the same as the previous mode, except that the phased restart\n\ | |
263 | procedure is used whenever any of the daemons hangs or crashes. Example:\n\ | |
264 | %s -Adz -r '/sbin/service %%s restart' \\\n\ | |
265 | -s '/sbin/service %%s start' \\\n\ | |
266 | -k '/sbin/service %%s stop' zebra ospfd bgpd\n\n\ | |
267 | As of this writing, it is believed that mode 2 [%s]\n\ | |
268 | is not safe, and mode 3 [%s] may not be safe with some of the\n\ | |
269 | routing daemons.\n\n\ | |
270 | In order to avoid attempting to restart the daemons in a fast loop,\n\ | |
271 | the -m and -M options allow you to control the minimum delay between\n\ | |
272 | restart commands. The minimum restart delay is recalculated each time\n\ | |
273 | a restart is attempted: if the time since the last restart attempt exceeds\n\ | |
274 | twice the -M value, then the restart delay is set to the -m value.\n\ | |
275 | Otherwise, the interval is doubled (but capped at the -M value).\n\n\ | |
276 | Options:\n\ | |
277 | -d, --daemon Run in daemon mode. In this mode, error messages are sent\n\ | |
278 | to syslog instead of stdout.\n\ | |
279 | -S, --statedir Set the vty socket directory (default is %s)\n\ | |
280 | -e, --no-echo Do not ping the daemons to test responsiveness (this\n\ | |
281 | option is necessary if the daemons do not support the\n\ | |
282 | echo command)\n\ | |
283 | -l, --loglevel Set the logging level (default is %d).\n\ | |
284 | The value should range from %d (LOG_EMERG) to %d (LOG_DEBUG),\n\ | |
285 | but it can be set higher than %d if extra-verbose debugging\n\ | |
286 | messages are desired.\n\ | |
287 | -m, --min-restart-interval\n\ | |
288 | Set the minimum seconds to wait between invocations of daemon\n\ | |
289 | restart commands (default is %d).\n\ | |
290 | -M, --max-restart-interval\n\ | |
291 | Set the maximum seconds to wait between invocations of daemon\n\ | |
292 | restart commands (default is %d).\n\ | |
293 | -i, --interval Set the status polling interval in seconds (default is %d)\n\ | |
294 | -t, --timeout Set the unresponsiveness timeout in seconds (default is %d)\n\ | |
295 | -T, --restart-timeout\n\ | |
296 | Set the restart (kill) timeout in seconds (default is %d).\n\ | |
297 | If any background jobs are still running after this much\n\ | |
298 | time has elapsed, they will be killed.\n\ | |
299 | -r, --restart Supply a Bourne shell command to use to restart a single\n\ | |
300 | daemon. The command string should include '%%s' where the\n\ | |
301 | name of the daemon should be substituted.\n\ | |
302 | Note that -r and -R are incompatible.\n\ | |
303 | -s, --start-command\n\ | |
304 | Supply a Bourne shell to command to use to start a single\n\ | |
305 | daemon. The command string should include '%%s' where the\n\ | |
306 | name of the daemon should be substituted.\n\ | |
307 | -k, --kill-command\n\ | |
308 | Supply a Bourne shell to command to use to stop a single\n\ | |
309 | daemon. The command string should include '%%s' where the\n\ | |
310 | name of the daemon should be substituted.\n\ | |
311 | -R, --restart-all\n\ | |
312 | When one or more daemons is down, try to restart everything\n\ | |
313 | using the Bourne shell command supplied as the argument.\n\ | |
314 | Note that -r and -R are incompatible.\n\ | |
315 | -z, --unresponsive-restart\n\ | |
316 | When a daemon is unresponsive, treat it as being down for\n\ | |
317 | restart purposes.\n\ | |
318 | -a, --all-restart\n\ | |
319 | When zebra hangs or crashes, restart all daemons using\n\ | |
320 | this phased approach: 1. stop all other daemons; 2. restart\n\ | |
321 | zebra; 3. start other daemons. Requires -r, -s, and -k.\n\ | |
322 | -A, --always-all-restart\n\ | |
323 | When any daemon (not just zebra) hangs or crashes, use the\n\ | |
324 | same phased restart mechanism described above for -a.\n\ | |
325 | Requires -r, -s, and -k.\n\ | |
326 | -p, --pid-file Set process identifier file name\n\ | |
327 | (default is %s).\n\ | |
c8b40f86 | 328 | -b, --blank-string\n\ |
329 | When the supplied argument string is found in any of the\n\ | |
330 | various shell command arguments (-r, -s, -k, or -R), replace\n\ | |
331 | it with a space. This is an ugly hack to circumvent problems\n\ | |
332 | passing command-line arguments with embedded spaces.\n\ | |
8b886ca7 | 333 | -v, --version Print program version\n\ |
334 | -h, --help Display this help and exit\n\ | |
335 | ", progname,mode_str[0],progname,mode_str[1],progname,mode_str[2], | |
336 | progname,mode_str[3],progname,mode_str[4],progname,mode_str[2],mode_str[3], | |
16f6511e | 337 | VTYDIR,DEFAULT_LOGLEVEL,LOG_EMERG,LOG_DEBUG,LOG_DEBUG, |
8b886ca7 | 338 | DEFAULT_MIN_RESTART,DEFAULT_MAX_RESTART, |
339 | DEFAULT_PERIOD,DEFAULT_TIMEOUT,DEFAULT_RESTART_TIMEOUT,DEFAULT_PIDFILE); | |
340 | ||
341 | return status; | |
342 | } | |
343 | ||
344 | static pid_t | |
345 | run_background(const char *shell_cmd) | |
346 | { | |
347 | pid_t child; | |
348 | ||
349 | switch (child = fork()) | |
350 | { | |
351 | case -1: | |
352 | zlog_err("fork failed, cannot run command [%s]: %s", | |
353 | shell_cmd,safe_strerror(errno)); | |
354 | return -1; | |
355 | case 0: | |
356 | /* Child process. */ | |
357 | /* Use separate process group so child processes can be killed easily. */ | |
358 | if (setpgid(0,0) < 0) | |
359 | zlog_warn("warning: setpgid(0,0) failed: %s",safe_strerror(errno)); | |
360 | { | |
361 | const char *argv[4] = { "sh", "-c", shell_cmd, NULL}; | |
362 | execv("/bin/sh",(char *const *)argv); | |
363 | zlog_err("execv(/bin/sh -c '%s') failed: %s", | |
364 | shell_cmd,safe_strerror(errno)); | |
365 | _exit(127); | |
366 | } | |
367 | default: | |
368 | /* Parent process: we will reap the child later. */ | |
369 | zlog_err("Forked background command [pid %d]: %s",child,shell_cmd); | |
370 | return child; | |
371 | } | |
372 | } | |
373 | ||
374 | static struct timeval * | |
375 | time_elapsed(struct timeval *result, const struct timeval *start_time) | |
376 | { | |
377 | gettimeofday(result,NULL); | |
378 | result->tv_sec -= start_time->tv_sec; | |
379 | result->tv_usec -= start_time->tv_usec; | |
380 | while (result->tv_usec < 0) | |
381 | { | |
382 | result->tv_usec += 1000000L; | |
383 | result->tv_sec--; | |
384 | } | |
385 | return result; | |
386 | } | |
387 | ||
388 | static int | |
389 | restart_kill(struct thread *t_kill) | |
390 | { | |
391 | struct restart_info *restart = THREAD_ARG(t_kill); | |
392 | struct timeval delay; | |
393 | ||
394 | time_elapsed(&delay,&restart->time); | |
395 | zlog_warn("Warning: %s %s child process %d still running after " | |
396 | "%ld seconds, sending signal %d", | |
397 | restart->what,restart->name,restart->pid,delay.tv_sec, | |
398 | (restart->kills ? SIGKILL : SIGTERM)); | |
399 | kill(-restart->pid,(restart->kills ? SIGKILL : SIGTERM)); | |
400 | restart->kills++; | |
401 | restart->t_kill = thread_add_timer(master,restart_kill,restart, | |
402 | gs.restart_timeout); | |
403 | return 0; | |
404 | } | |
405 | ||
406 | static struct restart_info * | |
407 | find_child(pid_t child) | |
408 | { | |
409 | if (gs.mode == MODE_GLOBAL_RESTART) | |
410 | { | |
411 | if (gs.restart.pid == child) | |
412 | return &gs.restart; | |
413 | } | |
414 | else | |
415 | { | |
416 | struct daemon *dmn; | |
417 | for (dmn = gs.daemons; dmn; dmn = dmn->next) | |
418 | { | |
419 | if (dmn->restart.pid == child) | |
420 | return &dmn->restart; | |
421 | } | |
422 | } | |
423 | return NULL; | |
424 | } | |
425 | ||
426 | static void | |
427 | sigchild(void) | |
428 | { | |
429 | pid_t child; | |
430 | int status; | |
431 | const char *name; | |
432 | const char *what; | |
433 | struct restart_info *restart; | |
434 | ||
435 | switch (child = waitpid(-1,&status,WNOHANG)) | |
436 | { | |
437 | case -1: | |
438 | zlog_err("waitpid failed: %s",safe_strerror(errno)); | |
439 | return; | |
440 | case 0: | |
441 | zlog_warn("SIGCHLD received, but waitpid did not reap a child"); | |
442 | return; | |
443 | } | |
444 | ||
445 | if ((restart = find_child(child)) != NULL) | |
446 | { | |
447 | name = restart->name; | |
448 | what = restart->what; | |
449 | restart->pid = 0; | |
450 | gs.numpids--; | |
451 | thread_cancel(restart->t_kill); | |
452 | restart->t_kill = NULL; | |
453 | /* Update restart time to reflect the time the command completed. */ | |
454 | gettimeofday(&restart->time,NULL); | |
455 | } | |
456 | else | |
457 | { | |
458 | zlog_err("waitpid returned status for an unknown child process %d", | |
459 | child); | |
460 | name = "(unknown)"; | |
461 | what = "background"; | |
462 | } | |
463 | if (WIFSTOPPED(status)) | |
464 | zlog_warn("warning: %s %s process %d is stopped", | |
465 | what,name,child); | |
466 | else if (WIFSIGNALED(status)) | |
467 | zlog_warn("%s %s process %d terminated due to signal %d", | |
468 | what,name,child,WTERMSIG(status)); | |
469 | else if (WIFEXITED(status)) | |
470 | { | |
471 | if (WEXITSTATUS(status) != 0) | |
472 | zlog_warn("%s %s process %d exited with non-zero status %d", | |
473 | what,name,child,WEXITSTATUS(status)); | |
474 | else | |
475 | zlog_debug("%s %s process %d exited normally",what,name,child); | |
476 | } | |
477 | else | |
478 | zlog_err("cannot interpret %s %s process %d wait status 0x%x", | |
479 | what,name,child,status); | |
480 | phase_check(); | |
481 | } | |
482 | ||
483 | static int | |
484 | run_job(struct restart_info *restart, const char *cmdtype, const char *command, | |
485 | int force, int update_interval) | |
486 | { | |
487 | struct timeval delay; | |
488 | ||
489 | if (gs.loglevel > LOG_DEBUG+1) | |
490 | zlog_debug("attempting to %s %s",cmdtype,restart->name); | |
491 | ||
492 | if (restart->pid) | |
493 | { | |
494 | if (gs.loglevel > LOG_DEBUG+1) | |
495 | zlog_debug("cannot %s %s, previous pid %d still running", | |
496 | cmdtype,restart->name,restart->pid); | |
497 | return -1; | |
498 | } | |
499 | ||
500 | if (!force && | |
501 | (time_elapsed(&delay,&restart->time)->tv_sec < restart->interval)) | |
502 | { | |
503 | if (gs.loglevel > LOG_DEBUG+1) | |
504 | zlog_debug("postponing %s %s: " | |
505 | "elapsed time %ld < retry interval %ld", | |
506 | cmdtype,restart->name,(long)delay.tv_sec,restart->interval); | |
507 | return -1; | |
508 | } | |
509 | ||
510 | gettimeofday(&restart->time,NULL); | |
511 | restart->kills = 0; | |
512 | { | |
513 | char cmd[strlen(command)+strlen(restart->name)+1]; | |
514 | snprintf(cmd,sizeof(cmd),command,restart->name); | |
515 | if ((restart->pid = run_background(cmd)) > 0) | |
516 | { | |
517 | restart->t_kill = thread_add_timer(master,restart_kill,restart, | |
518 | gs.restart_timeout); | |
519 | restart->what = cmdtype; | |
520 | gs.numpids++; | |
521 | } | |
522 | else | |
523 | restart->pid = 0; | |
524 | } | |
525 | ||
526 | /* Calculate the new restart interval. */ | |
527 | if (update_interval) | |
528 | { | |
529 | if (delay.tv_sec > 2*gs.max_restart_interval) | |
530 | restart->interval = gs.min_restart_interval; | |
531 | else if ((restart->interval *= 2) > gs.max_restart_interval) | |
532 | restart->interval = gs.max_restart_interval; | |
533 | if (gs.loglevel > LOG_DEBUG+1) | |
534 | zlog_debug("restart %s interval is now %ld", | |
535 | restart->name,restart->interval); | |
536 | } | |
537 | return restart->pid; | |
538 | } | |
539 | ||
540 | #define SET_READ_HANDLER(DMN) \ | |
541 | (DMN)->t_read = thread_add_read(master,handle_read,(DMN),(DMN)->fd) | |
542 | ||
543 | #define SET_WAKEUP_DOWN(DMN) \ | |
544 | (DMN)->t_wakeup = thread_add_timer_msec(master,wakeup_down,(DMN), \ | |
545 | FUZZY(gs.period)) | |
546 | ||
547 | #define SET_WAKEUP_UNRESPONSIVE(DMN) \ | |
548 | (DMN)->t_wakeup = thread_add_timer_msec(master,wakeup_unresponsive,(DMN), \ | |
549 | FUZZY(gs.period)) | |
550 | ||
551 | #define SET_WAKEUP_ECHO(DMN) \ | |
552 | (DMN)->t_wakeup = thread_add_timer_msec(master,wakeup_send_echo,(DMN), \ | |
553 | FUZZY(gs.period)) | |
554 | ||
555 | static int | |
556 | wakeup_down(struct thread *t_wakeup) | |
557 | { | |
558 | struct daemon *dmn = THREAD_ARG(t_wakeup); | |
559 | ||
560 | dmn->t_wakeup = NULL; | |
561 | if (try_connect(dmn) < 0) | |
562 | SET_WAKEUP_DOWN(dmn); | |
563 | if ((dmn->connect_tries > 1) && (dmn->state != DAEMON_UP)) | |
564 | try_restart(dmn); | |
565 | return 0; | |
566 | } | |
567 | ||
568 | static int | |
569 | wakeup_init(struct thread *t_wakeup) | |
570 | { | |
571 | struct daemon *dmn = THREAD_ARG(t_wakeup); | |
572 | ||
573 | dmn->t_wakeup = NULL; | |
574 | if (try_connect(dmn) < 0) | |
575 | { | |
576 | SET_WAKEUP_DOWN(dmn); | |
577 | zlog_err("%s state -> down : initial connection attempt failed", | |
578 | dmn->name); | |
579 | dmn->state = DAEMON_DOWN; | |
580 | } | |
581 | return 0; | |
582 | } | |
583 | ||
584 | static void | |
585 | daemon_down(struct daemon *dmn, const char *why) | |
586 | { | |
587 | if (IS_UP(dmn) || (dmn->state == DAEMON_INIT)) | |
588 | zlog_err("%s state -> down : %s",dmn->name,why); | |
589 | else if (gs.loglevel > LOG_DEBUG) | |
590 | zlog_debug("%s still down : %s",dmn->name,why); | |
591 | if (IS_UP(dmn)) | |
592 | gs.numdown++; | |
593 | dmn->state = DAEMON_DOWN; | |
594 | if (dmn->fd >= 0) | |
595 | { | |
596 | close(dmn->fd); | |
597 | dmn->fd = -1; | |
598 | } | |
599 | THREAD_OFF(dmn->t_read); | |
600 | THREAD_OFF(dmn->t_write); | |
601 | THREAD_OFF(dmn->t_wakeup); | |
602 | if (try_connect(dmn) < 0) | |
603 | SET_WAKEUP_DOWN(dmn); | |
604 | phase_check(); | |
605 | } | |
606 | ||
607 | static int | |
608 | handle_read(struct thread *t_read) | |
609 | { | |
610 | struct daemon *dmn = THREAD_ARG(t_read); | |
611 | static const char resp[sizeof(PING_TOKEN)+4] = PING_TOKEN "\n"; | |
612 | char buf[sizeof(resp)+100]; | |
613 | ssize_t rc; | |
614 | struct timeval delay; | |
615 | ||
616 | dmn->t_read = NULL; | |
617 | if ((rc = read(dmn->fd,buf,sizeof(buf))) < 0) | |
618 | { | |
619 | char why[100]; | |
620 | ||
621 | if ((errno == EINTR) || (errno == EAGAIN)) | |
622 | { | |
623 | /* Pretend it never happened. */ | |
624 | SET_READ_HANDLER(dmn); | |
625 | return 0; | |
626 | } | |
627 | snprintf(why,sizeof(why),"unexpected read error: %s", | |
628 | safe_strerror(errno)); | |
629 | daemon_down(dmn,why); | |
630 | return 0; | |
631 | } | |
632 | if (rc == 0) | |
633 | { | |
634 | daemon_down(dmn,"read returned EOF"); | |
635 | return 0; | |
636 | } | |
637 | if (!dmn->echo_sent.tv_sec) | |
638 | { | |
639 | char why[sizeof(buf)+100]; | |
640 | snprintf(why,sizeof(why),"unexpected read returns %zd bytes: %.*s", | |
641 | rc,rc,buf); | |
642 | daemon_down(dmn,why); | |
643 | return 0; | |
644 | } | |
645 | ||
646 | /* We are expecting an echo response: is there any chance that the | |
647 | response would not be returned entirely in the first read? That | |
648 | seems inconceivable... */ | |
649 | if ((rc != sizeof(resp)) || memcmp(buf,resp,sizeof(resp))) | |
650 | { | |
651 | char why[100+sizeof(buf)]; | |
652 | snprintf(why,sizeof(why),"read returned bad echo response of %zd bytes " | |
653 | "(expecting %zu): %.*s", | |
654 | rc,sizeof(resp),rc,buf); | |
655 | daemon_down(dmn,why); | |
656 | return 0; | |
657 | } | |
658 | ||
659 | time_elapsed(&delay,&dmn->echo_sent); | |
660 | dmn->echo_sent.tv_sec = 0; | |
661 | if (dmn->state == DAEMON_UNRESPONSIVE) | |
662 | { | |
663 | if (delay.tv_sec < gs.timeout) | |
664 | { | |
665 | dmn->state = DAEMON_UP; | |
666 | zlog_warn("%s state -> up : echo response received after %ld.%06ld " | |
667 | "seconds", dmn->name,delay.tv_sec,delay.tv_usec); | |
668 | } | |
669 | else | |
670 | zlog_warn("%s: slow echo response finally received after %ld.%06ld " | |
671 | "seconds", dmn->name,delay.tv_sec,delay.tv_usec); | |
672 | } | |
673 | else if (gs.loglevel > LOG_DEBUG+1) | |
674 | zlog_debug("%s: echo response received after %ld.%06ld seconds", | |
675 | dmn->name,delay.tv_sec,delay.tv_usec); | |
676 | ||
677 | SET_READ_HANDLER(dmn); | |
678 | if (dmn->t_wakeup) | |
679 | thread_cancel(dmn->t_wakeup); | |
680 | SET_WAKEUP_ECHO(dmn); | |
681 | ||
682 | return 0; | |
683 | } | |
684 | ||
685 | static void | |
686 | daemon_up(struct daemon *dmn, const char *why) | |
687 | { | |
688 | dmn->state = DAEMON_UP; | |
689 | gs.numdown--; | |
690 | dmn->connect_tries = 0; | |
691 | zlog_notice("%s state -> up : %s",dmn->name,why); | |
692 | if (gs.do_ping) | |
693 | SET_WAKEUP_ECHO(dmn); | |
694 | phase_check(); | |
695 | } | |
696 | ||
697 | static int | |
698 | check_connect(struct thread *t_write) | |
699 | { | |
700 | struct daemon *dmn = THREAD_ARG(t_write); | |
701 | int sockerr; | |
702 | socklen_t reslen = sizeof(sockerr); | |
703 | ||
704 | dmn->t_write = NULL; | |
705 | if (getsockopt(dmn->fd,SOL_SOCKET,SO_ERROR,(char *)&sockerr,&reslen) < 0) | |
706 | { | |
707 | zlog_warn("%s: check_connect: getsockopt failed: %s", | |
708 | dmn->name,safe_strerror(errno)); | |
709 | daemon_down(dmn,"getsockopt failed checking connection success"); | |
710 | return 0; | |
711 | } | |
712 | if ((reslen == sizeof(sockerr)) && sockerr) | |
713 | { | |
714 | char why[100]; | |
715 | snprintf(why,sizeof(why), | |
716 | "getsockopt reports that connection attempt failed: %s", | |
717 | safe_strerror(sockerr)); | |
718 | daemon_down(dmn,why); | |
719 | return 0; | |
720 | } | |
721 | ||
722 | daemon_up(dmn,"delayed connect succeeded"); | |
723 | return 0; | |
724 | } | |
725 | ||
726 | static int | |
727 | wakeup_connect_hanging(struct thread *t_wakeup) | |
728 | { | |
729 | struct daemon *dmn = THREAD_ARG(t_wakeup); | |
730 | char why[100]; | |
731 | ||
732 | dmn->t_wakeup = NULL; | |
733 | snprintf(why,sizeof(why),"connection attempt timed out after %ld seconds", | |
734 | gs.timeout); | |
735 | daemon_down(dmn,why); | |
736 | return 0; | |
737 | } | |
738 | ||
739 | /* Making connection to protocol daemon. */ | |
740 | static int | |
741 | try_connect(struct daemon *dmn) | |
742 | { | |
743 | int sock; | |
744 | struct sockaddr_un addr; | |
745 | socklen_t len; | |
746 | int flags; | |
747 | ||
748 | if (gs.loglevel > LOG_DEBUG+1) | |
749 | zlog_debug("%s: attempting to connect",dmn->name); | |
750 | dmn->connect_tries++; | |
751 | ||
752 | memset (&addr, 0, sizeof (struct sockaddr_un)); | |
753 | addr.sun_family = AF_UNIX; | |
754 | snprintf(addr.sun_path, sizeof(addr.sun_path), "%s/%s.vty", | |
755 | gs.vtydir,dmn->name); | |
756 | #ifdef HAVE_SUN_LEN | |
757 | len = addr.sun_len = SUN_LEN(&addr); | |
758 | #else | |
759 | len = sizeof (addr.sun_family) + strlen (addr.sun_path); | |
760 | #endif /* HAVE_SUN_LEN */ | |
761 | ||
762 | /* Quick check to see if we might succeed before we go to the trouble | |
763 | of creating a socket. */ | |
764 | if (access(addr.sun_path, W_OK) < 0) | |
765 | { | |
766 | if (errno != ENOENT) | |
767 | zlog_err("%s: access to socket %s denied: %s", | |
768 | dmn->name,addr.sun_path,safe_strerror(errno)); | |
769 | return -1; | |
770 | } | |
771 | ||
772 | if ((sock = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) | |
773 | { | |
774 | zlog_err("%s(%s): cannot make socket: %s", | |
775 | __func__,addr.sun_path, safe_strerror(errno)); | |
776 | return -1; | |
777 | } | |
778 | ||
779 | /* Set non-blocking. */ | |
780 | if ((flags = fcntl(sock, F_GETFL, 0)) < 0) | |
781 | { | |
782 | zlog_err("%s(%s): fcntl(F_GETFL) failed: %s", | |
783 | __func__,addr.sun_path, safe_strerror(errno)); | |
784 | close(sock); | |
785 | return -1; | |
786 | } | |
787 | if (fcntl(sock, F_SETFL, (flags|O_NONBLOCK)) < 0) | |
788 | { | |
789 | zlog_err("%s(%s): fcntl(F_SETFL,O_NONBLOCK) failed: %s", | |
790 | __func__,addr.sun_path, safe_strerror(errno)); | |
791 | close(sock); | |
792 | return -1; | |
793 | } | |
794 | ||
795 | if (connect (sock, (struct sockaddr *) &addr, len) < 0) | |
796 | { | |
797 | if ((errno != EINPROGRESS) && (errno != EWOULDBLOCK)) | |
798 | { | |
799 | if (gs.loglevel > LOG_DEBUG) | |
800 | zlog_debug("%s(%s): connect failed: %s", | |
801 | __func__,addr.sun_path, safe_strerror(errno)); | |
802 | close (sock); | |
803 | return -1; | |
804 | } | |
805 | if (gs.loglevel > LOG_DEBUG) | |
806 | zlog_debug("%s: connection in progress",dmn->name); | |
807 | dmn->state = DAEMON_CONNECTING; | |
808 | dmn->fd = sock; | |
809 | dmn->t_write = thread_add_write(master,check_connect,dmn,dmn->fd); | |
810 | dmn->t_wakeup = thread_add_timer(master,wakeup_connect_hanging,dmn, | |
811 | gs.timeout); | |
812 | SET_READ_HANDLER(dmn); | |
813 | return 0; | |
814 | } | |
815 | ||
816 | dmn->fd = sock; | |
817 | SET_READ_HANDLER(dmn); | |
818 | daemon_up(dmn,"connect succeeded"); | |
819 | return 1; | |
820 | } | |
821 | ||
822 | static int | |
823 | phase_hanging(struct thread *t_hanging) | |
824 | { | |
825 | gs.t_phase_hanging = NULL; | |
826 | zlog_err("Phase [%s] hanging for %ld seconds, aborting phased restart", | |
827 | phase_str[gs.phase],PHASE_TIMEOUT); | |
828 | gs.phase = PHASE_NONE; | |
829 | return 0; | |
830 | } | |
831 | ||
832 | static void | |
833 | set_phase(restart_phase_t new_phase) | |
834 | { | |
835 | gs.phase = new_phase; | |
836 | if (gs.t_phase_hanging) | |
837 | thread_cancel(gs.t_phase_hanging); | |
838 | gs.t_phase_hanging = thread_add_timer(master,phase_hanging,NULL, | |
839 | PHASE_TIMEOUT); | |
840 | } | |
841 | ||
842 | static void | |
843 | phase_check(void) | |
844 | { | |
845 | switch (gs.phase) | |
846 | { | |
847 | case PHASE_NONE: | |
848 | break; | |
849 | case PHASE_STOPS_PENDING: | |
850 | if (gs.numpids) | |
851 | break; | |
852 | zlog_info("Phased restart: all routing daemon stop jobs have completed."); | |
853 | set_phase(PHASE_WAITING_DOWN); | |
854 | /*FALLTHRU*/ | |
855 | case PHASE_WAITING_DOWN: | |
856 | if (gs.numdown+IS_UP(gs.special) < gs.numdaemons) | |
857 | break; | |
858 | zlog_info("Phased restart: all routing daemons now down."); | |
859 | run_job(&gs.special->restart,"restart",gs.restart_command,1,1); | |
860 | set_phase(PHASE_ZEBRA_RESTART_PENDING); | |
861 | /*FALLTHRU*/ | |
862 | case PHASE_ZEBRA_RESTART_PENDING: | |
863 | if (gs.special->restart.pid) | |
864 | break; | |
865 | zlog_info("Phased restart: %s restart job completed.",gs.special->name); | |
866 | set_phase(PHASE_WAITING_ZEBRA_UP); | |
867 | /*FALLTHRU*/ | |
868 | case PHASE_WAITING_ZEBRA_UP: | |
869 | if (!IS_UP(gs.special)) | |
870 | break; | |
871 | zlog_info("Phased restart: %s is now up.",gs.special->name); | |
872 | { | |
873 | struct daemon *dmn; | |
874 | for (dmn = gs.daemons; dmn; dmn = dmn->next) | |
875 | { | |
876 | if (dmn != gs.special) | |
877 | run_job(&dmn->restart,"start",gs.start_command,1,1); | |
878 | } | |
879 | } | |
880 | gs.phase = PHASE_NONE; | |
881 | THREAD_OFF(gs.t_phase_hanging); | |
882 | zlog_notice("Phased global restart has completed."); | |
883 | break; | |
884 | } | |
885 | } | |
886 | ||
887 | static void | |
888 | try_restart(struct daemon *dmn) | |
889 | { | |
890 | switch (gs.mode) | |
891 | { | |
892 | case MODE_MONITOR: | |
893 | return; | |
894 | case MODE_GLOBAL_RESTART: | |
895 | run_job(&gs.restart,"restart",gs.restart_command,0,1); | |
896 | break; | |
897 | case MODE_SEPARATE_RESTART: | |
898 | run_job(&dmn->restart,"restart",gs.restart_command,0,1); | |
899 | break; | |
900 | case MODE_PHASED_ZEBRA_RESTART: | |
901 | if (dmn != gs.special) | |
902 | { | |
903 | if ((gs.special->state == DAEMON_UP) && (gs.phase == PHASE_NONE)) | |
904 | run_job(&dmn->restart,"restart",gs.restart_command,0,1); | |
905 | else | |
906 | zlog_debug("%s: postponing restart attempt because master %s daemon " | |
907 | "not up [%s], or phased restart in progress", | |
908 | dmn->name,gs.special->name,state_str[gs.special->state]); | |
909 | break; | |
910 | } | |
911 | /*FALLTHRU*/ | |
912 | case MODE_PHASED_ALL_RESTART: | |
913 | if ((gs.phase != PHASE_NONE) || gs.numpids) | |
914 | { | |
915 | if (gs.loglevel > LOG_DEBUG+1) | |
916 | zlog_debug("postponing phased global restart: restart already in " | |
917 | "progress [%s], or outstanding child processes [%d]", | |
918 | phase_str[gs.phase],gs.numpids); | |
919 | break; | |
920 | } | |
921 | /* Is it too soon for a restart? */ | |
922 | { | |
923 | struct timeval delay; | |
924 | if (time_elapsed(&delay,&gs.special->restart.time)->tv_sec < | |
925 | gs.special->restart.interval) | |
926 | { | |
927 | if (gs.loglevel > LOG_DEBUG+1) | |
928 | zlog_debug("postponing phased global restart: " | |
929 | "elapsed time %ld < retry interval %ld", | |
930 | (long)delay.tv_sec,gs.special->restart.interval); | |
931 | break; | |
932 | } | |
933 | } | |
934 | zlog_info("Phased restart: stopping all routing daemons."); | |
935 | /* First step: stop all other daemons. */ | |
936 | for (dmn = gs.daemons; dmn; dmn = dmn->next) | |
937 | { | |
938 | if (dmn != gs.special) | |
939 | run_job(&dmn->restart,"stop",gs.stop_command,1,0); | |
940 | } | |
941 | set_phase(PHASE_STOPS_PENDING); | |
942 | break; | |
943 | default: | |
944 | zlog_err("error: unknown restart mode %d",gs.mode); | |
945 | break; | |
946 | } | |
947 | } | |
948 | ||
949 | static int | |
950 | wakeup_unresponsive(struct thread *t_wakeup) | |
951 | { | |
952 | struct daemon *dmn = THREAD_ARG(t_wakeup); | |
953 | ||
954 | dmn->t_wakeup = NULL; | |
955 | if (dmn->state != DAEMON_UNRESPONSIVE) | |
956 | zlog_err("%s: no longer unresponsive (now %s), " | |
957 | "wakeup should have been cancelled!", | |
958 | dmn->name,state_str[dmn->state]); | |
959 | else | |
960 | { | |
961 | SET_WAKEUP_UNRESPONSIVE(dmn); | |
962 | try_restart(dmn); | |
963 | } | |
964 | return 0; | |
965 | } | |
966 | ||
967 | static int | |
968 | wakeup_no_answer(struct thread *t_wakeup) | |
969 | { | |
970 | struct daemon *dmn = THREAD_ARG(t_wakeup); | |
971 | ||
972 | dmn->t_wakeup = NULL; | |
973 | dmn->state = DAEMON_UNRESPONSIVE; | |
974 | zlog_err("%s state -> unresponsive : no response yet to ping " | |
975 | "sent %ld seconds ago",dmn->name,gs.timeout); | |
976 | if (gs.unresponsive_restart) | |
977 | { | |
978 | SET_WAKEUP_UNRESPONSIVE(dmn); | |
979 | try_restart(dmn); | |
980 | } | |
981 | return 0; | |
982 | } | |
983 | ||
984 | static int | |
985 | wakeup_send_echo(struct thread *t_wakeup) | |
986 | { | |
987 | static const char echocmd[] = "echo " PING_TOKEN; | |
988 | ssize_t rc; | |
989 | struct daemon *dmn = THREAD_ARG(t_wakeup); | |
990 | ||
991 | dmn->t_wakeup = NULL; | |
992 | if (((rc = write(dmn->fd,echocmd,sizeof(echocmd))) < 0) || | |
993 | ((size_t)rc != sizeof(echocmd))) | |
994 | { | |
995 | char why[100+sizeof(echocmd)]; | |
996 | snprintf(why,sizeof(why),"write '%s' returned %zd instead of %zu", | |
997 | echocmd,rc,sizeof(echocmd)); | |
998 | daemon_down(dmn,why); | |
999 | } | |
1000 | else | |
1001 | { | |
1002 | gettimeofday(&dmn->echo_sent,NULL); | |
1003 | dmn->t_wakeup = thread_add_timer(master,wakeup_no_answer,dmn,gs.timeout); | |
1004 | } | |
1005 | return 0; | |
1006 | } | |
1007 | ||
1008 | static void | |
1009 | sigint(void) | |
1010 | { | |
1011 | zlog_notice("Terminating on signal"); | |
1012 | exit(0); | |
1013 | } | |
1014 | ||
1015 | static int | |
1016 | valid_command(const char *cmd) | |
1017 | { | |
1018 | char *p; | |
1019 | ||
1020 | return ((p = strchr(cmd,'%')) != NULL) && (*(p+1) == 's') && !strchr(p+1,'%'); | |
1021 | } | |
1022 | ||
c8b40f86 | 1023 | /* This is an ugly hack to circumvent problems with passing command-line |
1024 | arguments that contain spaces. The fix is to use a configuration file. */ | |
1025 | static char * | |
1026 | translate_blanks(const char *cmd, const char *blankstr) | |
1027 | { | |
1028 | char *res; | |
1029 | char *p; | |
1030 | size_t bslen = strlen(blankstr); | |
1031 | ||
1032 | if (!(res = strdup(cmd))) | |
1033 | { | |
1034 | perror("strdup"); | |
1035 | exit(1); | |
1036 | } | |
1037 | while ((p = strstr(res,blankstr)) != NULL) | |
1038 | { | |
1039 | *p = ' '; | |
1040 | if (bslen != 1) | |
1041 | memmove(p+1,p+bslen,strlen(p+bslen)+1); | |
1042 | } | |
1043 | return res; | |
1044 | } | |
1045 | ||
8b886ca7 | 1046 | int |
1047 | main(int argc, char **argv) | |
1048 | { | |
1049 | const char *progname; | |
1050 | int opt; | |
1051 | int daemon_mode = 0; | |
1052 | const char *pidfile = DEFAULT_PIDFILE; | |
1053 | const char *special = "zebra"; | |
c8b40f86 | 1054 | const char *blankstr = NULL; |
8b886ca7 | 1055 | static struct quagga_signal_t my_signals[] = |
1056 | { | |
1057 | { | |
1058 | .signal = SIGINT, | |
1059 | .handler = sigint, | |
1060 | }, | |
1061 | { | |
1062 | .signal = SIGTERM, | |
1063 | .handler = sigint, | |
1064 | }, | |
1065 | { | |
1066 | .signal = SIGCHLD, | |
1067 | .handler = sigchild, | |
1068 | }, | |
1069 | }; | |
1070 | ||
1071 | if ((progname = strrchr (argv[0], '/')) != NULL) | |
1072 | progname++; | |
1073 | else | |
1074 | progname = argv[0]; | |
1075 | ||
c8b40f86 | 1076 | while ((opt = getopt_long(argc, argv, "aAb:dek:l:m:M:i:p:r:R:S:s:t:T:zvh", |
8b886ca7 | 1077 | longopts, 0)) != EOF) |
1078 | { | |
1079 | switch (opt) | |
1080 | { | |
1081 | case 0: | |
1082 | break; | |
1083 | case 'a': | |
1084 | if ((gs.mode != MODE_MONITOR) && (gs.mode != MODE_SEPARATE_RESTART)) | |
1085 | { | |
1086 | fputs("Ambiguous operating mode selected.\n",stderr); | |
1087 | return usage(progname,1); | |
1088 | } | |
1089 | gs.mode = MODE_PHASED_ZEBRA_RESTART; | |
1090 | break; | |
1091 | case 'A': | |
1092 | if ((gs.mode != MODE_MONITOR) && (gs.mode != MODE_SEPARATE_RESTART)) | |
1093 | { | |
1094 | fputs("Ambiguous operating mode selected.\n",stderr); | |
1095 | return usage(progname,1); | |
1096 | } | |
1097 | gs.mode = MODE_PHASED_ALL_RESTART; | |
1098 | break; | |
c8b40f86 | 1099 | case 'b': |
1100 | blankstr = optarg; | |
1101 | break; | |
8b886ca7 | 1102 | case 'd': |
1103 | daemon_mode = 1; | |
1104 | break; | |
1105 | case 'e': | |
1106 | gs.do_ping = 0; | |
1107 | break; | |
1108 | case 'k': | |
1109 | if (!valid_command(optarg)) | |
1110 | { | |
1111 | fprintf(stderr,"Invalid kill command, must contain '%%s': %s\n", | |
1112 | optarg); | |
1113 | return usage(progname,1); | |
1114 | } | |
1115 | gs.stop_command = optarg; | |
1116 | break; | |
1117 | case 'l': | |
1118 | { | |
1119 | char garbage[3]; | |
1120 | if ((sscanf(optarg,"%d%1s",&gs.loglevel,garbage) != 1) || | |
1121 | (gs.loglevel < LOG_EMERG)) | |
1122 | { | |
1123 | fprintf(stderr,"Invalid loglevel argument: %s\n",optarg); | |
1124 | return usage(progname,1); | |
1125 | } | |
1126 | } | |
1127 | break; | |
1128 | case 'm': | |
1129 | { | |
1130 | char garbage[3]; | |
1131 | if ((sscanf(optarg,"%ld%1s", | |
1132 | &gs.min_restart_interval,garbage) != 1) || | |
1133 | (gs.min_restart_interval < 0)) | |
1134 | { | |
1135 | fprintf(stderr,"Invalid min_restart_interval argument: %s\n", | |
1136 | optarg); | |
1137 | return usage(progname,1); | |
1138 | } | |
1139 | } | |
1140 | break; | |
1141 | case 'M': | |
1142 | { | |
1143 | char garbage[3]; | |
1144 | if ((sscanf(optarg,"%ld%1s", | |
1145 | &gs.max_restart_interval,garbage) != 1) || | |
1146 | (gs.max_restart_interval < 0)) | |
1147 | { | |
1148 | fprintf(stderr,"Invalid max_restart_interval argument: %s\n", | |
1149 | optarg); | |
1150 | return usage(progname,1); | |
1151 | } | |
1152 | } | |
1153 | break; | |
1154 | case 'i': | |
1155 | { | |
1156 | char garbage[3]; | |
1157 | int period; | |
1158 | if ((sscanf(optarg,"%d%1s",&period,garbage) != 1) || | |
1159 | (gs.period < 1)) | |
1160 | { | |
1161 | fprintf(stderr,"Invalid interval argument: %s\n",optarg); | |
1162 | return usage(progname,1); | |
1163 | } | |
1164 | gs.period = 1000*period; | |
1165 | } | |
1166 | break; | |
1167 | case 'p': | |
1168 | pidfile = optarg; | |
1169 | break; | |
1170 | case 'r': | |
1171 | if ((gs.mode == MODE_GLOBAL_RESTART) || | |
1172 | (gs.mode == MODE_SEPARATE_RESTART)) | |
1173 | { | |
1174 | fputs("Ambiguous operating mode selected.\n",stderr); | |
1175 | return usage(progname,1); | |
1176 | } | |
1177 | if (!valid_command(optarg)) | |
1178 | { | |
1179 | fprintf(stderr, | |
1180 | "Invalid restart command, must contain '%%s': %s\n", | |
1181 | optarg); | |
1182 | return usage(progname,1); | |
1183 | } | |
1184 | gs.restart_command = optarg; | |
1185 | if (gs.mode == MODE_MONITOR) | |
1186 | gs.mode = MODE_SEPARATE_RESTART; | |
1187 | break; | |
1188 | case 'R': | |
1189 | if (gs.mode != MODE_MONITOR) | |
1190 | { | |
1191 | fputs("Ambiguous operating mode selected.\n",stderr); | |
1192 | return usage(progname,1); | |
1193 | } | |
1194 | if (strchr(optarg,'%')) | |
1195 | { | |
1196 | fprintf(stderr, | |
1197 | "Invalid restart-all arg, must not contain '%%s': %s\n", | |
1198 | optarg); | |
1199 | return usage(progname,1); | |
1200 | } | |
1201 | gs.restart_command = optarg; | |
1202 | gs.mode = MODE_GLOBAL_RESTART; | |
1203 | break; | |
1204 | case 's': | |
1205 | if (!valid_command(optarg)) | |
1206 | { | |
1207 | fprintf(stderr,"Invalid start command, must contain '%%s': %s\n", | |
1208 | optarg); | |
1209 | return usage(progname,1); | |
1210 | } | |
1211 | gs.start_command = optarg; | |
1212 | break; | |
1213 | case 'S': | |
1214 | gs.vtydir = optarg; | |
1215 | break; | |
1216 | case 't': | |
1217 | { | |
1218 | char garbage[3]; | |
1219 | if ((sscanf(optarg,"%ld%1s",&gs.timeout,garbage) != 1) || | |
1220 | (gs.timeout < 1)) | |
1221 | { | |
1222 | fprintf(stderr,"Invalid timeout argument: %s\n",optarg); | |
1223 | return usage(progname,1); | |
1224 | } | |
1225 | } | |
1226 | break; | |
1227 | case 'T': | |
1228 | { | |
1229 | char garbage[3]; | |
1230 | if ((sscanf(optarg,"%ld%1s",&gs.restart_timeout,garbage) != 1) || | |
1231 | (gs.restart_timeout < 1)) | |
1232 | { | |
1233 | fprintf(stderr,"Invalid restart timeout argument: %s\n",optarg); | |
1234 | return usage(progname,1); | |
1235 | } | |
1236 | } | |
1237 | break; | |
1238 | case 'z': | |
1239 | gs.unresponsive_restart = 1; | |
1240 | break; | |
1241 | case 'v': | |
1242 | printf ("%s version %s\n", progname, QUAGGA_VERSION); | |
1243 | puts("Copyright 2004 Andrew J. Schorr"); | |
1244 | return 0; | |
1245 | case 'h': | |
1246 | return usage(progname,0); | |
1247 | default: | |
1248 | fputs("Invalid option.\n",stderr); | |
1249 | return usage(progname,1); | |
1250 | } | |
1251 | } | |
1252 | ||
1253 | if (gs.unresponsive_restart && (gs.mode == MODE_MONITOR)) | |
1254 | { | |
1255 | fputs("Option -z requires a -r or -R restart option.\n",stderr); | |
1256 | return usage(progname,1); | |
1257 | } | |
1258 | switch (gs.mode) | |
1259 | { | |
1260 | case MODE_MONITOR: | |
1261 | if (gs.restart_command || gs.start_command || gs.stop_command) | |
1262 | { | |
1263 | fprintf(stderr,"No kill/(re)start commands needed for %s mode.\n", | |
1264 | mode_str[gs.mode]); | |
1265 | return usage(progname,1); | |
1266 | } | |
1267 | break; | |
1268 | case MODE_GLOBAL_RESTART: | |
1269 | case MODE_SEPARATE_RESTART: | |
1270 | if (!gs.restart_command || gs.start_command || gs.stop_command) | |
1271 | { | |
1272 | fprintf(stderr,"No start/kill commands needed in [%s] mode.\n", | |
1273 | mode_str[gs.mode]); | |
1274 | return usage(progname,1); | |
1275 | } | |
1276 | break; | |
1277 | case MODE_PHASED_ZEBRA_RESTART: | |
1278 | case MODE_PHASED_ALL_RESTART: | |
1279 | if (!gs.restart_command || !gs.start_command || !gs.stop_command) | |
1280 | { | |
1281 | fprintf(stderr, | |
1282 | "Need start, kill, and restart commands in [%s] mode.\n", | |
1283 | mode_str[gs.mode]); | |
1284 | return usage(progname,1); | |
1285 | } | |
1286 | break; | |
1287 | } | |
1288 | ||
c8b40f86 | 1289 | if (blankstr) |
1290 | { | |
1291 | if (gs.restart_command) | |
1292 | gs.restart_command = translate_blanks(gs.restart_command,blankstr); | |
1293 | if (gs.start_command) | |
1294 | gs.start_command = translate_blanks(gs.start_command,blankstr); | |
1295 | if (gs.stop_command) | |
1296 | gs.stop_command = translate_blanks(gs.stop_command,blankstr); | |
1297 | } | |
1298 | ||
8b886ca7 | 1299 | gs.restart.interval = gs.min_restart_interval; |
1300 | master = thread_master_create(); | |
1301 | signal_init (master, Q_SIGC(my_signals), my_signals); | |
1302 | srandom(time(NULL)); | |
1303 | ||
1304 | { | |
1305 | int i; | |
1306 | struct daemon *tail = NULL; | |
1307 | ||
1308 | for (i = optind; i < argc; i++) | |
1309 | { | |
1310 | struct daemon *dmn; | |
1311 | ||
1312 | if (!(dmn = (struct daemon *)calloc(1,sizeof(*dmn)))) | |
1313 | { | |
1314 | fprintf(stderr,"calloc(1,%zu) failed: %s\n", | |
1315 | sizeof(*dmn), safe_strerror(errno)); | |
1316 | return 1; | |
1317 | } | |
1318 | dmn->name = dmn->restart.name = argv[i]; | |
1319 | dmn->state = DAEMON_INIT; | |
1320 | gs.numdaemons++; | |
1321 | gs.numdown++; | |
1322 | dmn->fd = -1; | |
1323 | dmn->t_wakeup = thread_add_timer_msec(master,wakeup_init,dmn, | |
1324 | 100+(random() % 900)); | |
1325 | dmn->restart.interval = gs.min_restart_interval; | |
1326 | if (tail) | |
1327 | tail->next = dmn; | |
1328 | else | |
1329 | gs.daemons = dmn; | |
1330 | tail = dmn; | |
1331 | ||
1332 | if (((gs.mode == MODE_PHASED_ZEBRA_RESTART) || | |
1333 | (gs.mode == MODE_PHASED_ALL_RESTART)) && | |
1334 | !strcmp(dmn->name,special)) | |
1335 | gs.special = dmn; | |
1336 | } | |
1337 | } | |
1338 | if (!gs.daemons) | |
1339 | { | |
1340 | fputs("Must specify one or more daemons to monitor.\n",stderr); | |
1341 | return usage(progname,1); | |
1342 | } | |
1343 | if (((gs.mode == MODE_PHASED_ZEBRA_RESTART) || | |
1344 | (gs.mode == MODE_PHASED_ALL_RESTART)) && !gs.special) | |
1345 | { | |
1346 | fprintf(stderr,"In mode [%s], but cannot find master daemon %s\n", | |
1347 | mode_str[gs.mode],special); | |
1348 | return usage(progname,1); | |
1349 | } | |
1350 | if (gs.special && (gs.numdaemons < 2)) | |
1351 | { | |
1352 | fprintf(stderr,"Mode [%s] does not make sense with only 1 daemon " | |
1353 | "to watch.\n",mode_str[gs.mode]); | |
1354 | return usage(progname,1); | |
1355 | } | |
1356 | ||
1357 | zlog_default = openzlog(progname, ZLOG_NONE, | |
1358 | LOG_CONS|LOG_NDELAY|LOG_PID, LOG_DAEMON); | |
1359 | zlog_set_level(NULL, ZLOG_DEST_MONITOR, ZLOG_DISABLED); | |
1360 | if (daemon_mode) | |
1361 | { | |
1362 | zlog_set_level(NULL, ZLOG_DEST_SYSLOG, MIN(gs.loglevel,LOG_DEBUG)); | |
1363 | daemon(0, 0); | |
1364 | } | |
1365 | else | |
1366 | zlog_set_level(NULL, ZLOG_DEST_STDOUT, MIN(gs.loglevel,LOG_DEBUG)); | |
1367 | ||
1368 | /* Make sure we're not already running. */ | |
1369 | pid_output (pidfile); | |
1370 | ||
1371 | /* Announce which daemons are being monitored. */ | |
1372 | { | |
1373 | struct daemon *dmn; | |
1374 | size_t len = 0; | |
1375 | ||
1376 | for (dmn = gs.daemons; dmn; dmn = dmn->next) | |
1377 | len += strlen(dmn->name)+1; | |
1378 | ||
1379 | { | |
1380 | char buf[len+1]; | |
1381 | char *p = buf; | |
1382 | ||
1383 | for (dmn = gs.daemons; dmn; dmn = dmn->next) | |
1384 | { | |
1385 | if (p != buf) | |
1386 | *p++ = ' '; | |
1387 | strcpy(p,dmn->name); | |
1388 | p += strlen(p); | |
1389 | } | |
1390 | zlog_notice("%s %s watching [%s], mode [%s]", | |
1391 | progname, QUAGGA_VERSION, buf, mode_str[gs.mode]); | |
1392 | } | |
1393 | } | |
1394 | ||
1395 | { | |
1396 | struct thread thread; | |
1397 | ||
1398 | while (thread_fetch (master, &thread)) | |
1399 | thread_call (&thread); | |
1400 | } | |
1401 | ||
1402 | /* Not reached. */ | |
1403 | return 0; | |
1404 | } |