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8b886ca7 | 1 | /* |
6f594023 | 2 | $Id: watchquagga.c,v 1.6 2004/12/23 19:35:56 paul 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> | |
098e240f | 34 | #include <string.h> |
8b886ca7 | 35 | #include <sys/time.h> |
36 | #include <sys/wait.h> | |
37 | ||
38 | /* Quagga headers: */ | |
6028df52 | 39 | #ifdef HAVE_CONFIG_H |
40 | #include "config.h" | |
41 | #endif | |
42 | ||
8b886ca7 | 43 | #include <thread.h> |
44 | #include <log.h> | |
45 | #include <sigevent.h> | |
46 | #include <version.h> | |
6f594023 | 47 | #include <getopt.h> |
8b886ca7 | 48 | |
49 | #ifndef MIN | |
50 | #define MIN(X,Y) (((X) <= (Y)) ? (X) : (Y)) | |
51 | #endif | |
52 | ||
53 | /* Macros to help randomize timers. */ | |
54 | #define JITTER(X) ((random() % ((X)+1))-((X)/2)) | |
55 | #define FUZZY(X) ((X)+JITTER((X)/20)) | |
56 | ||
57 | #define DEFAULT_PERIOD 5 | |
58 | #define DEFAULT_TIMEOUT 10 | |
59 | #define DEFAULT_RESTART_TIMEOUT 20 | |
60 | #define DEFAULT_LOGLEVEL LOG_INFO | |
61 | #define DEFAULT_MIN_RESTART 60 | |
62 | #define DEFAULT_MAX_RESTART 600 | |
6028df52 | 63 | #ifdef PATH_WATCHQUAGGA_PID |
64 | #define DEFAULT_PIDFILE PATH_WATCHQUAGGA_PID | |
65 | #else | |
8b886ca7 | 66 | #define DEFAULT_PIDFILE STATEDIR "/watchquagga.pid" |
6028df52 | 67 | #endif |
16f6511e | 68 | #ifdef DAEMON_VTY_DIR |
69 | #define VTYDIR DAEMON_VTY_DIR | |
70 | #else | |
71 | #define VTYDIR STATEDIR | |
72 | #endif | |
8b886ca7 | 73 | |
74 | #define PING_TOKEN "PING" | |
75 | ||
76 | /* Needs to be global, referenced somewhere inside libzebra. */ | |
77 | struct thread_master *master; | |
78 | ||
79 | typedef enum | |
80 | { | |
81 | MODE_MONITOR = 0, | |
82 | MODE_GLOBAL_RESTART, | |
83 | MODE_SEPARATE_RESTART, | |
84 | MODE_PHASED_ZEBRA_RESTART, | |
85 | MODE_PHASED_ALL_RESTART | |
86 | } watch_mode_t; | |
87 | ||
88 | static const char *mode_str[] = | |
89 | { | |
90 | "monitor", | |
91 | "global restart", | |
92 | "individual daemon restart", | |
93 | "phased zebra restart", | |
94 | "phased global restart for any failure", | |
95 | }; | |
96 | ||
97 | typedef enum | |
98 | { | |
99 | PHASE_NONE = 0, | |
100 | PHASE_STOPS_PENDING, | |
101 | PHASE_WAITING_DOWN, | |
102 | PHASE_ZEBRA_RESTART_PENDING, | |
103 | PHASE_WAITING_ZEBRA_UP | |
104 | } restart_phase_t; | |
105 | ||
106 | static const char *phase_str[] = | |
107 | { | |
108 | "None", | |
109 | "Stop jobs running", | |
110 | "Waiting for other daemons to come down", | |
111 | "Zebra restart job running", | |
112 | "Waiting for zebra to come up", | |
113 | "Start jobs running", | |
114 | }; | |
115 | ||
116 | #define PHASE_TIMEOUT (3*gs.restart_timeout) | |
117 | ||
098e240f | 118 | struct restart_info |
119 | { | |
120 | const char *name; | |
121 | const char *what; | |
122 | pid_t pid; | |
123 | struct timeval time; | |
124 | long interval; | |
125 | struct thread *t_kill; | |
126 | int kills; | |
127 | }; | |
128 | ||
129 | static struct global_state | |
130 | { | |
8b886ca7 | 131 | watch_mode_t mode; |
132 | restart_phase_t phase; | |
133 | struct thread *t_phase_hanging; | |
134 | const char *vtydir; | |
135 | long period; | |
136 | long timeout; | |
137 | long restart_timeout; | |
138 | long min_restart_interval; | |
139 | long max_restart_interval; | |
140 | int do_ping; | |
141 | struct daemon *daemons; | |
142 | const char *restart_command; | |
143 | const char *start_command; | |
144 | const char *stop_command; | |
098e240f | 145 | struct restart_info restart; |
8b886ca7 | 146 | int unresponsive_restart; |
147 | int loglevel; | |
148 | struct daemon *special; /* points to zebra when doing phased restart */ | |
149 | int numdaemons; | |
150 | int numpids; | |
151 | int numdown; /* # of daemons that are not UP or UNRESPONSIVE */ | |
152 | } gs = { | |
153 | .mode = MODE_MONITOR, | |
154 | .phase = PHASE_NONE, | |
16f6511e | 155 | .vtydir = VTYDIR, |
8b886ca7 | 156 | .period = 1000*DEFAULT_PERIOD, |
157 | .timeout = DEFAULT_TIMEOUT, | |
158 | .restart_timeout = DEFAULT_RESTART_TIMEOUT, | |
159 | .loglevel = DEFAULT_LOGLEVEL, | |
160 | .min_restart_interval = DEFAULT_MIN_RESTART, | |
161 | .max_restart_interval = DEFAULT_MAX_RESTART, | |
162 | .do_ping = 1, | |
8b886ca7 | 163 | }; |
164 | ||
165 | typedef enum | |
166 | { | |
167 | DAEMON_INIT, | |
168 | DAEMON_DOWN, | |
169 | DAEMON_CONNECTING, | |
170 | DAEMON_UP, | |
171 | DAEMON_UNRESPONSIVE | |
172 | } daemon_state_t; | |
173 | ||
174 | #define IS_UP(DMN) \ | |
175 | (((DMN)->state == DAEMON_UP) || ((DMN)->state == DAEMON_UNRESPONSIVE)) | |
176 | ||
177 | static const char *state_str[] = | |
178 | { | |
179 | "Init", | |
180 | "Down", | |
181 | "Connecting", | |
182 | "Up", | |
183 | "Unresponsive", | |
184 | }; | |
185 | ||
186 | struct daemon { | |
187 | const char *name; | |
188 | daemon_state_t state; | |
189 | int fd; | |
190 | struct timeval echo_sent; | |
191 | u_int connect_tries; | |
192 | struct thread *t_wakeup; | |
193 | struct thread *t_read; | |
194 | struct thread *t_write; | |
195 | struct daemon *next; | |
196 | struct restart_info restart; | |
197 | }; | |
198 | ||
199 | static const struct option longopts[] = | |
200 | { | |
201 | { "daemon", no_argument, NULL, 'd'}, | |
202 | { "statedir", required_argument, NULL, 'S'}, | |
203 | { "no-echo", no_argument, NULL, 'e'}, | |
204 | { "loglevel", required_argument, NULL, 'l'}, | |
205 | { "interval", required_argument, NULL, 'i'}, | |
206 | { "timeout", required_argument, NULL, 't'}, | |
207 | { "restart-timeout", required_argument, NULL, 'T'}, | |
208 | { "restart", required_argument, NULL, 'r'}, | |
209 | { "start-command", required_argument, NULL, 's'}, | |
210 | { "kill-command", required_argument, NULL, 'k'}, | |
211 | { "restart-all", required_argument, NULL, 'R'}, | |
212 | { "all-restart", no_argument, NULL, 'a'}, | |
213 | { "always-all-restart", no_argument, NULL, 'A'}, | |
214 | { "unresponsive-restart", no_argument, NULL, 'z'}, | |
215 | { "min-restart-interval", required_argument, NULL, 'm'}, | |
216 | { "max-restart-interval", required_argument, NULL, 'M'}, | |
217 | { "pid-file", required_argument, NULL, 'p'}, | |
c8b40f86 | 218 | { "blank-string", required_argument, NULL, 'b'}, |
8b886ca7 | 219 | { "help", no_argument, NULL, 'h'}, |
220 | { "version", no_argument, NULL, 'v'}, | |
221 | { NULL, 0, NULL, 0 } | |
222 | }; | |
223 | ||
224 | static int try_connect(struct daemon *dmn); | |
225 | static int wakeup_send_echo(struct thread *t_wakeup); | |
226 | static void try_restart(struct daemon *dmn); | |
227 | static void phase_check(void); | |
228 | ||
229 | static int | |
230 | usage(const char *progname, int status) | |
231 | { | |
232 | if (status != 0) | |
233 | fprintf(stderr, "Try `%s --help' for more information.\n", progname); | |
234 | else | |
235 | printf("Usage : %s [OPTION...] <daemon name> ...\n\n\ | |
236 | Watchdog program to monitor status of quagga daemons and try to restart\n\ | |
237 | them if they are down or unresponsive. It determines whether a daemon is\n\ | |
238 | up based on whether it can connect to the daemon's vty unix stream socket.\n\ | |
239 | It then repeatedly sends echo commands over that socket to determine whether\n\ | |
240 | the daemon is responsive. If the daemon crashes, we will receive an EOF\n\ | |
241 | on the socket connection and know immediately that the daemon is down.\n\n\ | |
242 | The daemons to be monitored should be listed on the command line.\n\n\ | |
243 | This program can run in one of 5 modes:\n\n\ | |
244 | 0. Mode: %s.\n\ | |
245 | Just monitor and report on status changes. Example:\n\ | |
246 | %s -d zebra ospfd bgpd\n\n\ | |
247 | 1. Mode: %s.\n\ | |
248 | Whenever any daemon hangs or crashes, use the given command to restart\n\ | |
249 | them all. Example:\n\ | |
250 | %s -dz \\\n\ | |
251 | -R '/sbin/service zebra restart; /sbin/service ospfd restart' \\\n\ | |
252 | zebra ospfd\n\n\ | |
253 | 2. Mode: %s.\n\ | |
254 | When any single daemon hangs or crashes, restart only the daemon that's\n\ | |
255 | in trouble using the supplied restart command. Example:\n\ | |
256 | %s -dz -r '/sbin/service %%s restart' zebra ospfd bgpd\n\n\ | |
257 | 3. Mode: %s.\n\ | |
258 | The same as the previous mode, except that there is special treatment when\n\ | |
259 | the zebra daemon is in trouble. In that case, a phased restart approach\n\ | |
260 | is used: 1. stop all other daemons; 2. restart zebra; 3. start the other\n\ | |
261 | daemons. Example:\n\ | |
262 | %s -adz -r '/sbin/service %%s restart' \\\n\ | |
263 | -s '/sbin/service %%s start' \\\n\ | |
264 | -k '/sbin/service %%s stop' zebra ospfd bgpd\n\n\ | |
265 | 4. Mode: %s.\n\ | |
266 | This is the same as the previous mode, except that the phased restart\n\ | |
267 | procedure is used whenever any of the daemons hangs or crashes. Example:\n\ | |
268 | %s -Adz -r '/sbin/service %%s restart' \\\n\ | |
269 | -s '/sbin/service %%s start' \\\n\ | |
270 | -k '/sbin/service %%s stop' zebra ospfd bgpd\n\n\ | |
271 | As of this writing, it is believed that mode 2 [%s]\n\ | |
272 | is not safe, and mode 3 [%s] may not be safe with some of the\n\ | |
273 | routing daemons.\n\n\ | |
274 | In order to avoid attempting to restart the daemons in a fast loop,\n\ | |
275 | the -m and -M options allow you to control the minimum delay between\n\ | |
276 | restart commands. The minimum restart delay is recalculated each time\n\ | |
277 | a restart is attempted: if the time since the last restart attempt exceeds\n\ | |
278 | twice the -M value, then the restart delay is set to the -m value.\n\ | |
279 | Otherwise, the interval is doubled (but capped at the -M value).\n\n\ | |
280 | Options:\n\ | |
281 | -d, --daemon Run in daemon mode. In this mode, error messages are sent\n\ | |
282 | to syslog instead of stdout.\n\ | |
283 | -S, --statedir Set the vty socket directory (default is %s)\n\ | |
284 | -e, --no-echo Do not ping the daemons to test responsiveness (this\n\ | |
285 | option is necessary if the daemons do not support the\n\ | |
286 | echo command)\n\ | |
287 | -l, --loglevel Set the logging level (default is %d).\n\ | |
288 | The value should range from %d (LOG_EMERG) to %d (LOG_DEBUG),\n\ | |
289 | but it can be set higher than %d if extra-verbose debugging\n\ | |
290 | messages are desired.\n\ | |
291 | -m, --min-restart-interval\n\ | |
292 | Set the minimum seconds to wait between invocations of daemon\n\ | |
293 | restart commands (default is %d).\n\ | |
294 | -M, --max-restart-interval\n\ | |
295 | Set the maximum seconds to wait between invocations of daemon\n\ | |
296 | restart commands (default is %d).\n\ | |
297 | -i, --interval Set the status polling interval in seconds (default is %d)\n\ | |
298 | -t, --timeout Set the unresponsiveness timeout in seconds (default is %d)\n\ | |
299 | -T, --restart-timeout\n\ | |
300 | Set the restart (kill) timeout in seconds (default is %d).\n\ | |
301 | If any background jobs are still running after this much\n\ | |
302 | time has elapsed, they will be killed.\n\ | |
303 | -r, --restart Supply a Bourne shell command to use to restart a single\n\ | |
304 | daemon. The command string should include '%%s' where the\n\ | |
305 | name of the daemon should be substituted.\n\ | |
306 | Note that -r and -R are incompatible.\n\ | |
307 | -s, --start-command\n\ | |
308 | Supply a Bourne shell to command to use to start a single\n\ | |
309 | daemon. The command string should include '%%s' where the\n\ | |
310 | name of the daemon should be substituted.\n\ | |
311 | -k, --kill-command\n\ | |
312 | Supply a Bourne shell to command to use to stop a single\n\ | |
313 | daemon. The command string should include '%%s' where the\n\ | |
314 | name of the daemon should be substituted.\n\ | |
315 | -R, --restart-all\n\ | |
316 | When one or more daemons is down, try to restart everything\n\ | |
317 | using the Bourne shell command supplied as the argument.\n\ | |
318 | Note that -r and -R are incompatible.\n\ | |
319 | -z, --unresponsive-restart\n\ | |
320 | When a daemon is unresponsive, treat it as being down for\n\ | |
321 | restart purposes.\n\ | |
322 | -a, --all-restart\n\ | |
323 | When zebra hangs or crashes, restart all daemons using\n\ | |
324 | this phased approach: 1. stop all other daemons; 2. restart\n\ | |
325 | zebra; 3. start other daemons. Requires -r, -s, and -k.\n\ | |
326 | -A, --always-all-restart\n\ | |
327 | When any daemon (not just zebra) hangs or crashes, use the\n\ | |
328 | same phased restart mechanism described above for -a.\n\ | |
329 | Requires -r, -s, and -k.\n\ | |
330 | -p, --pid-file Set process identifier file name\n\ | |
331 | (default is %s).\n\ | |
c8b40f86 | 332 | -b, --blank-string\n\ |
333 | When the supplied argument string is found in any of the\n\ | |
334 | various shell command arguments (-r, -s, -k, or -R), replace\n\ | |
335 | it with a space. This is an ugly hack to circumvent problems\n\ | |
336 | passing command-line arguments with embedded spaces.\n\ | |
8b886ca7 | 337 | -v, --version Print program version\n\ |
338 | -h, --help Display this help and exit\n\ | |
339 | ", progname,mode_str[0],progname,mode_str[1],progname,mode_str[2], | |
340 | progname,mode_str[3],progname,mode_str[4],progname,mode_str[2],mode_str[3], | |
16f6511e | 341 | VTYDIR,DEFAULT_LOGLEVEL,LOG_EMERG,LOG_DEBUG,LOG_DEBUG, |
8b886ca7 | 342 | DEFAULT_MIN_RESTART,DEFAULT_MAX_RESTART, |
343 | DEFAULT_PERIOD,DEFAULT_TIMEOUT,DEFAULT_RESTART_TIMEOUT,DEFAULT_PIDFILE); | |
344 | ||
345 | return status; | |
346 | } | |
347 | ||
348 | static pid_t | |
349 | run_background(const char *shell_cmd) | |
350 | { | |
351 | pid_t child; | |
352 | ||
353 | switch (child = fork()) | |
354 | { | |
355 | case -1: | |
356 | zlog_err("fork failed, cannot run command [%s]: %s", | |
357 | shell_cmd,safe_strerror(errno)); | |
358 | return -1; | |
359 | case 0: | |
360 | /* Child process. */ | |
361 | /* Use separate process group so child processes can be killed easily. */ | |
362 | if (setpgid(0,0) < 0) | |
363 | zlog_warn("warning: setpgid(0,0) failed: %s",safe_strerror(errno)); | |
364 | { | |
365 | const char *argv[4] = { "sh", "-c", shell_cmd, NULL}; | |
366 | execv("/bin/sh",(char *const *)argv); | |
367 | zlog_err("execv(/bin/sh -c '%s') failed: %s", | |
368 | shell_cmd,safe_strerror(errno)); | |
369 | _exit(127); | |
370 | } | |
371 | default: | |
372 | /* Parent process: we will reap the child later. */ | |
373 | zlog_err("Forked background command [pid %d]: %s",child,shell_cmd); | |
374 | return child; | |
375 | } | |
376 | } | |
377 | ||
378 | static struct timeval * | |
379 | time_elapsed(struct timeval *result, const struct timeval *start_time) | |
380 | { | |
381 | gettimeofday(result,NULL); | |
382 | result->tv_sec -= start_time->tv_sec; | |
383 | result->tv_usec -= start_time->tv_usec; | |
384 | while (result->tv_usec < 0) | |
385 | { | |
386 | result->tv_usec += 1000000L; | |
387 | result->tv_sec--; | |
388 | } | |
389 | return result; | |
390 | } | |
391 | ||
392 | static int | |
393 | restart_kill(struct thread *t_kill) | |
394 | { | |
395 | struct restart_info *restart = THREAD_ARG(t_kill); | |
396 | struct timeval delay; | |
397 | ||
398 | time_elapsed(&delay,&restart->time); | |
399 | zlog_warn("Warning: %s %s child process %d still running after " | |
400 | "%ld seconds, sending signal %d", | |
401 | restart->what,restart->name,restart->pid,delay.tv_sec, | |
402 | (restart->kills ? SIGKILL : SIGTERM)); | |
403 | kill(-restart->pid,(restart->kills ? SIGKILL : SIGTERM)); | |
404 | restart->kills++; | |
405 | restart->t_kill = thread_add_timer(master,restart_kill,restart, | |
406 | gs.restart_timeout); | |
407 | return 0; | |
408 | } | |
409 | ||
410 | static struct restart_info * | |
411 | find_child(pid_t child) | |
412 | { | |
413 | if (gs.mode == MODE_GLOBAL_RESTART) | |
414 | { | |
415 | if (gs.restart.pid == child) | |
416 | return &gs.restart; | |
417 | } | |
418 | else | |
419 | { | |
420 | struct daemon *dmn; | |
421 | for (dmn = gs.daemons; dmn; dmn = dmn->next) | |
422 | { | |
423 | if (dmn->restart.pid == child) | |
424 | return &dmn->restart; | |
425 | } | |
426 | } | |
427 | return NULL; | |
428 | } | |
429 | ||
430 | static void | |
431 | sigchild(void) | |
432 | { | |
433 | pid_t child; | |
434 | int status; | |
435 | const char *name; | |
436 | const char *what; | |
437 | struct restart_info *restart; | |
438 | ||
439 | switch (child = waitpid(-1,&status,WNOHANG)) | |
440 | { | |
441 | case -1: | |
442 | zlog_err("waitpid failed: %s",safe_strerror(errno)); | |
443 | return; | |
444 | case 0: | |
445 | zlog_warn("SIGCHLD received, but waitpid did not reap a child"); | |
446 | return; | |
447 | } | |
448 | ||
449 | if ((restart = find_child(child)) != NULL) | |
450 | { | |
451 | name = restart->name; | |
452 | what = restart->what; | |
453 | restart->pid = 0; | |
454 | gs.numpids--; | |
455 | thread_cancel(restart->t_kill); | |
456 | restart->t_kill = NULL; | |
457 | /* Update restart time to reflect the time the command completed. */ | |
458 | gettimeofday(&restart->time,NULL); | |
459 | } | |
460 | else | |
461 | { | |
462 | zlog_err("waitpid returned status for an unknown child process %d", | |
463 | child); | |
464 | name = "(unknown)"; | |
465 | what = "background"; | |
466 | } | |
467 | if (WIFSTOPPED(status)) | |
468 | zlog_warn("warning: %s %s process %d is stopped", | |
469 | what,name,child); | |
470 | else if (WIFSIGNALED(status)) | |
471 | zlog_warn("%s %s process %d terminated due to signal %d", | |
472 | what,name,child,WTERMSIG(status)); | |
473 | else if (WIFEXITED(status)) | |
474 | { | |
475 | if (WEXITSTATUS(status) != 0) | |
476 | zlog_warn("%s %s process %d exited with non-zero status %d", | |
477 | what,name,child,WEXITSTATUS(status)); | |
478 | else | |
479 | zlog_debug("%s %s process %d exited normally",what,name,child); | |
480 | } | |
481 | else | |
482 | zlog_err("cannot interpret %s %s process %d wait status 0x%x", | |
483 | what,name,child,status); | |
484 | phase_check(); | |
485 | } | |
486 | ||
487 | static int | |
488 | run_job(struct restart_info *restart, const char *cmdtype, const char *command, | |
489 | int force, int update_interval) | |
490 | { | |
491 | struct timeval delay; | |
492 | ||
493 | if (gs.loglevel > LOG_DEBUG+1) | |
494 | zlog_debug("attempting to %s %s",cmdtype,restart->name); | |
495 | ||
496 | if (restart->pid) | |
497 | { | |
498 | if (gs.loglevel > LOG_DEBUG+1) | |
499 | zlog_debug("cannot %s %s, previous pid %d still running", | |
500 | cmdtype,restart->name,restart->pid); | |
501 | return -1; | |
502 | } | |
503 | ||
504 | if (!force && | |
505 | (time_elapsed(&delay,&restart->time)->tv_sec < restart->interval)) | |
506 | { | |
507 | if (gs.loglevel > LOG_DEBUG+1) | |
508 | zlog_debug("postponing %s %s: " | |
509 | "elapsed time %ld < retry interval %ld", | |
510 | cmdtype,restart->name,(long)delay.tv_sec,restart->interval); | |
511 | return -1; | |
512 | } | |
513 | ||
514 | gettimeofday(&restart->time,NULL); | |
515 | restart->kills = 0; | |
516 | { | |
517 | char cmd[strlen(command)+strlen(restart->name)+1]; | |
518 | snprintf(cmd,sizeof(cmd),command,restart->name); | |
519 | if ((restart->pid = run_background(cmd)) > 0) | |
520 | { | |
521 | restart->t_kill = thread_add_timer(master,restart_kill,restart, | |
522 | gs.restart_timeout); | |
523 | restart->what = cmdtype; | |
524 | gs.numpids++; | |
525 | } | |
526 | else | |
527 | restart->pid = 0; | |
528 | } | |
529 | ||
530 | /* Calculate the new restart interval. */ | |
531 | if (update_interval) | |
532 | { | |
533 | if (delay.tv_sec > 2*gs.max_restart_interval) | |
534 | restart->interval = gs.min_restart_interval; | |
535 | else if ((restart->interval *= 2) > gs.max_restart_interval) | |
536 | restart->interval = gs.max_restart_interval; | |
537 | if (gs.loglevel > LOG_DEBUG+1) | |
538 | zlog_debug("restart %s interval is now %ld", | |
539 | restart->name,restart->interval); | |
540 | } | |
541 | return restart->pid; | |
542 | } | |
543 | ||
544 | #define SET_READ_HANDLER(DMN) \ | |
545 | (DMN)->t_read = thread_add_read(master,handle_read,(DMN),(DMN)->fd) | |
546 | ||
547 | #define SET_WAKEUP_DOWN(DMN) \ | |
548 | (DMN)->t_wakeup = thread_add_timer_msec(master,wakeup_down,(DMN), \ | |
549 | FUZZY(gs.period)) | |
550 | ||
551 | #define SET_WAKEUP_UNRESPONSIVE(DMN) \ | |
552 | (DMN)->t_wakeup = thread_add_timer_msec(master,wakeup_unresponsive,(DMN), \ | |
553 | FUZZY(gs.period)) | |
554 | ||
555 | #define SET_WAKEUP_ECHO(DMN) \ | |
556 | (DMN)->t_wakeup = thread_add_timer_msec(master,wakeup_send_echo,(DMN), \ | |
557 | FUZZY(gs.period)) | |
558 | ||
559 | static int | |
560 | wakeup_down(struct thread *t_wakeup) | |
561 | { | |
562 | struct daemon *dmn = THREAD_ARG(t_wakeup); | |
563 | ||
564 | dmn->t_wakeup = NULL; | |
565 | if (try_connect(dmn) < 0) | |
566 | SET_WAKEUP_DOWN(dmn); | |
567 | if ((dmn->connect_tries > 1) && (dmn->state != DAEMON_UP)) | |
568 | try_restart(dmn); | |
569 | return 0; | |
570 | } | |
571 | ||
572 | static int | |
573 | wakeup_init(struct thread *t_wakeup) | |
574 | { | |
575 | struct daemon *dmn = THREAD_ARG(t_wakeup); | |
576 | ||
577 | dmn->t_wakeup = NULL; | |
578 | if (try_connect(dmn) < 0) | |
579 | { | |
580 | SET_WAKEUP_DOWN(dmn); | |
581 | zlog_err("%s state -> down : initial connection attempt failed", | |
582 | dmn->name); | |
583 | dmn->state = DAEMON_DOWN; | |
584 | } | |
585 | return 0; | |
586 | } | |
587 | ||
588 | static void | |
589 | daemon_down(struct daemon *dmn, const char *why) | |
590 | { | |
591 | if (IS_UP(dmn) || (dmn->state == DAEMON_INIT)) | |
592 | zlog_err("%s state -> down : %s",dmn->name,why); | |
593 | else if (gs.loglevel > LOG_DEBUG) | |
594 | zlog_debug("%s still down : %s",dmn->name,why); | |
595 | if (IS_UP(dmn)) | |
596 | gs.numdown++; | |
597 | dmn->state = DAEMON_DOWN; | |
598 | if (dmn->fd >= 0) | |
599 | { | |
600 | close(dmn->fd); | |
601 | dmn->fd = -1; | |
602 | } | |
603 | THREAD_OFF(dmn->t_read); | |
604 | THREAD_OFF(dmn->t_write); | |
605 | THREAD_OFF(dmn->t_wakeup); | |
606 | if (try_connect(dmn) < 0) | |
607 | SET_WAKEUP_DOWN(dmn); | |
608 | phase_check(); | |
609 | } | |
610 | ||
611 | static int | |
612 | handle_read(struct thread *t_read) | |
613 | { | |
614 | struct daemon *dmn = THREAD_ARG(t_read); | |
615 | static const char resp[sizeof(PING_TOKEN)+4] = PING_TOKEN "\n"; | |
616 | char buf[sizeof(resp)+100]; | |
617 | ssize_t rc; | |
618 | struct timeval delay; | |
619 | ||
620 | dmn->t_read = NULL; | |
621 | if ((rc = read(dmn->fd,buf,sizeof(buf))) < 0) | |
622 | { | |
623 | char why[100]; | |
624 | ||
625 | if ((errno == EINTR) || (errno == EAGAIN)) | |
626 | { | |
627 | /* Pretend it never happened. */ | |
628 | SET_READ_HANDLER(dmn); | |
629 | return 0; | |
630 | } | |
631 | snprintf(why,sizeof(why),"unexpected read error: %s", | |
632 | safe_strerror(errno)); | |
633 | daemon_down(dmn,why); | |
634 | return 0; | |
635 | } | |
636 | if (rc == 0) | |
637 | { | |
638 | daemon_down(dmn,"read returned EOF"); | |
639 | return 0; | |
640 | } | |
641 | if (!dmn->echo_sent.tv_sec) | |
642 | { | |
643 | char why[sizeof(buf)+100]; | |
098e240f | 644 | snprintf(why,sizeof(why),"unexpected read returns %d bytes: %.*s", |
645 | (int)rc,(int)rc,buf); | |
8b886ca7 | 646 | daemon_down(dmn,why); |
647 | return 0; | |
648 | } | |
649 | ||
650 | /* We are expecting an echo response: is there any chance that the | |
651 | response would not be returned entirely in the first read? That | |
652 | seems inconceivable... */ | |
653 | if ((rc != sizeof(resp)) || memcmp(buf,resp,sizeof(resp))) | |
654 | { | |
655 | char why[100+sizeof(buf)]; | |
098e240f | 656 | snprintf(why,sizeof(why),"read returned bad echo response of %d bytes " |
657 | "(expecting %u): %.*s", | |
658 | (int)rc,(u_int)sizeof(resp),(int)rc,buf); | |
8b886ca7 | 659 | daemon_down(dmn,why); |
660 | return 0; | |
661 | } | |
662 | ||
663 | time_elapsed(&delay,&dmn->echo_sent); | |
664 | dmn->echo_sent.tv_sec = 0; | |
665 | if (dmn->state == DAEMON_UNRESPONSIVE) | |
666 | { | |
667 | if (delay.tv_sec < gs.timeout) | |
668 | { | |
669 | dmn->state = DAEMON_UP; | |
670 | zlog_warn("%s state -> up : echo response received after %ld.%06ld " | |
671 | "seconds", dmn->name,delay.tv_sec,delay.tv_usec); | |
672 | } | |
673 | else | |
674 | zlog_warn("%s: slow echo response finally received after %ld.%06ld " | |
675 | "seconds", dmn->name,delay.tv_sec,delay.tv_usec); | |
676 | } | |
677 | else if (gs.loglevel > LOG_DEBUG+1) | |
678 | zlog_debug("%s: echo response received after %ld.%06ld seconds", | |
679 | dmn->name,delay.tv_sec,delay.tv_usec); | |
680 | ||
681 | SET_READ_HANDLER(dmn); | |
682 | if (dmn->t_wakeup) | |
683 | thread_cancel(dmn->t_wakeup); | |
684 | SET_WAKEUP_ECHO(dmn); | |
685 | ||
686 | return 0; | |
687 | } | |
688 | ||
689 | static void | |
690 | daemon_up(struct daemon *dmn, const char *why) | |
691 | { | |
692 | dmn->state = DAEMON_UP; | |
693 | gs.numdown--; | |
694 | dmn->connect_tries = 0; | |
695 | zlog_notice("%s state -> up : %s",dmn->name,why); | |
696 | if (gs.do_ping) | |
697 | SET_WAKEUP_ECHO(dmn); | |
698 | phase_check(); | |
699 | } | |
700 | ||
701 | static int | |
702 | check_connect(struct thread *t_write) | |
703 | { | |
704 | struct daemon *dmn = THREAD_ARG(t_write); | |
705 | int sockerr; | |
706 | socklen_t reslen = sizeof(sockerr); | |
707 | ||
708 | dmn->t_write = NULL; | |
709 | if (getsockopt(dmn->fd,SOL_SOCKET,SO_ERROR,(char *)&sockerr,&reslen) < 0) | |
710 | { | |
711 | zlog_warn("%s: check_connect: getsockopt failed: %s", | |
712 | dmn->name,safe_strerror(errno)); | |
713 | daemon_down(dmn,"getsockopt failed checking connection success"); | |
714 | return 0; | |
715 | } | |
716 | if ((reslen == sizeof(sockerr)) && sockerr) | |
717 | { | |
718 | char why[100]; | |
719 | snprintf(why,sizeof(why), | |
720 | "getsockopt reports that connection attempt failed: %s", | |
721 | safe_strerror(sockerr)); | |
722 | daemon_down(dmn,why); | |
723 | return 0; | |
724 | } | |
725 | ||
726 | daemon_up(dmn,"delayed connect succeeded"); | |
727 | return 0; | |
728 | } | |
729 | ||
730 | static int | |
731 | wakeup_connect_hanging(struct thread *t_wakeup) | |
732 | { | |
733 | struct daemon *dmn = THREAD_ARG(t_wakeup); | |
734 | char why[100]; | |
735 | ||
736 | dmn->t_wakeup = NULL; | |
737 | snprintf(why,sizeof(why),"connection attempt timed out after %ld seconds", | |
738 | gs.timeout); | |
739 | daemon_down(dmn,why); | |
740 | return 0; | |
741 | } | |
742 | ||
743 | /* Making connection to protocol daemon. */ | |
744 | static int | |
745 | try_connect(struct daemon *dmn) | |
746 | { | |
747 | int sock; | |
748 | struct sockaddr_un addr; | |
749 | socklen_t len; | |
750 | int flags; | |
751 | ||
752 | if (gs.loglevel > LOG_DEBUG+1) | |
753 | zlog_debug("%s: attempting to connect",dmn->name); | |
754 | dmn->connect_tries++; | |
755 | ||
756 | memset (&addr, 0, sizeof (struct sockaddr_un)); | |
757 | addr.sun_family = AF_UNIX; | |
758 | snprintf(addr.sun_path, sizeof(addr.sun_path), "%s/%s.vty", | |
759 | gs.vtydir,dmn->name); | |
760 | #ifdef HAVE_SUN_LEN | |
761 | len = addr.sun_len = SUN_LEN(&addr); | |
762 | #else | |
763 | len = sizeof (addr.sun_family) + strlen (addr.sun_path); | |
764 | #endif /* HAVE_SUN_LEN */ | |
765 | ||
766 | /* Quick check to see if we might succeed before we go to the trouble | |
767 | of creating a socket. */ | |
768 | if (access(addr.sun_path, W_OK) < 0) | |
769 | { | |
770 | if (errno != ENOENT) | |
771 | zlog_err("%s: access to socket %s denied: %s", | |
772 | dmn->name,addr.sun_path,safe_strerror(errno)); | |
773 | return -1; | |
774 | } | |
775 | ||
776 | if ((sock = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) | |
777 | { | |
778 | zlog_err("%s(%s): cannot make socket: %s", | |
779 | __func__,addr.sun_path, safe_strerror(errno)); | |
780 | return -1; | |
781 | } | |
782 | ||
783 | /* Set non-blocking. */ | |
784 | if ((flags = fcntl(sock, F_GETFL, 0)) < 0) | |
785 | { | |
786 | zlog_err("%s(%s): fcntl(F_GETFL) failed: %s", | |
787 | __func__,addr.sun_path, safe_strerror(errno)); | |
788 | close(sock); | |
789 | return -1; | |
790 | } | |
791 | if (fcntl(sock, F_SETFL, (flags|O_NONBLOCK)) < 0) | |
792 | { | |
793 | zlog_err("%s(%s): fcntl(F_SETFL,O_NONBLOCK) failed: %s", | |
794 | __func__,addr.sun_path, safe_strerror(errno)); | |
795 | close(sock); | |
796 | return -1; | |
797 | } | |
798 | ||
799 | if (connect (sock, (struct sockaddr *) &addr, len) < 0) | |
800 | { | |
801 | if ((errno != EINPROGRESS) && (errno != EWOULDBLOCK)) | |
802 | { | |
803 | if (gs.loglevel > LOG_DEBUG) | |
804 | zlog_debug("%s(%s): connect failed: %s", | |
805 | __func__,addr.sun_path, safe_strerror(errno)); | |
806 | close (sock); | |
807 | return -1; | |
808 | } | |
809 | if (gs.loglevel > LOG_DEBUG) | |
810 | zlog_debug("%s: connection in progress",dmn->name); | |
811 | dmn->state = DAEMON_CONNECTING; | |
812 | dmn->fd = sock; | |
813 | dmn->t_write = thread_add_write(master,check_connect,dmn,dmn->fd); | |
814 | dmn->t_wakeup = thread_add_timer(master,wakeup_connect_hanging,dmn, | |
815 | gs.timeout); | |
816 | SET_READ_HANDLER(dmn); | |
817 | return 0; | |
818 | } | |
819 | ||
820 | dmn->fd = sock; | |
821 | SET_READ_HANDLER(dmn); | |
822 | daemon_up(dmn,"connect succeeded"); | |
823 | return 1; | |
824 | } | |
825 | ||
826 | static int | |
827 | phase_hanging(struct thread *t_hanging) | |
828 | { | |
829 | gs.t_phase_hanging = NULL; | |
830 | zlog_err("Phase [%s] hanging for %ld seconds, aborting phased restart", | |
831 | phase_str[gs.phase],PHASE_TIMEOUT); | |
832 | gs.phase = PHASE_NONE; | |
833 | return 0; | |
834 | } | |
835 | ||
836 | static void | |
837 | set_phase(restart_phase_t new_phase) | |
838 | { | |
839 | gs.phase = new_phase; | |
840 | if (gs.t_phase_hanging) | |
841 | thread_cancel(gs.t_phase_hanging); | |
842 | gs.t_phase_hanging = thread_add_timer(master,phase_hanging,NULL, | |
843 | PHASE_TIMEOUT); | |
844 | } | |
845 | ||
846 | static void | |
847 | phase_check(void) | |
848 | { | |
849 | switch (gs.phase) | |
850 | { | |
851 | case PHASE_NONE: | |
852 | break; | |
853 | case PHASE_STOPS_PENDING: | |
854 | if (gs.numpids) | |
855 | break; | |
856 | zlog_info("Phased restart: all routing daemon stop jobs have completed."); | |
857 | set_phase(PHASE_WAITING_DOWN); | |
858 | /*FALLTHRU*/ | |
859 | case PHASE_WAITING_DOWN: | |
860 | if (gs.numdown+IS_UP(gs.special) < gs.numdaemons) | |
861 | break; | |
862 | zlog_info("Phased restart: all routing daemons now down."); | |
863 | run_job(&gs.special->restart,"restart",gs.restart_command,1,1); | |
864 | set_phase(PHASE_ZEBRA_RESTART_PENDING); | |
865 | /*FALLTHRU*/ | |
866 | case PHASE_ZEBRA_RESTART_PENDING: | |
867 | if (gs.special->restart.pid) | |
868 | break; | |
869 | zlog_info("Phased restart: %s restart job completed.",gs.special->name); | |
870 | set_phase(PHASE_WAITING_ZEBRA_UP); | |
871 | /*FALLTHRU*/ | |
872 | case PHASE_WAITING_ZEBRA_UP: | |
873 | if (!IS_UP(gs.special)) | |
874 | break; | |
875 | zlog_info("Phased restart: %s is now up.",gs.special->name); | |
876 | { | |
877 | struct daemon *dmn; | |
878 | for (dmn = gs.daemons; dmn; dmn = dmn->next) | |
879 | { | |
880 | if (dmn != gs.special) | |
881 | run_job(&dmn->restart,"start",gs.start_command,1,1); | |
882 | } | |
883 | } | |
884 | gs.phase = PHASE_NONE; | |
885 | THREAD_OFF(gs.t_phase_hanging); | |
886 | zlog_notice("Phased global restart has completed."); | |
887 | break; | |
888 | } | |
889 | } | |
890 | ||
891 | static void | |
892 | try_restart(struct daemon *dmn) | |
893 | { | |
894 | switch (gs.mode) | |
895 | { | |
896 | case MODE_MONITOR: | |
897 | return; | |
898 | case MODE_GLOBAL_RESTART: | |
899 | run_job(&gs.restart,"restart",gs.restart_command,0,1); | |
900 | break; | |
901 | case MODE_SEPARATE_RESTART: | |
902 | run_job(&dmn->restart,"restart",gs.restart_command,0,1); | |
903 | break; | |
904 | case MODE_PHASED_ZEBRA_RESTART: | |
905 | if (dmn != gs.special) | |
906 | { | |
907 | if ((gs.special->state == DAEMON_UP) && (gs.phase == PHASE_NONE)) | |
908 | run_job(&dmn->restart,"restart",gs.restart_command,0,1); | |
909 | else | |
910 | zlog_debug("%s: postponing restart attempt because master %s daemon " | |
911 | "not up [%s], or phased restart in progress", | |
912 | dmn->name,gs.special->name,state_str[gs.special->state]); | |
913 | break; | |
914 | } | |
915 | /*FALLTHRU*/ | |
916 | case MODE_PHASED_ALL_RESTART: | |
917 | if ((gs.phase != PHASE_NONE) || gs.numpids) | |
918 | { | |
919 | if (gs.loglevel > LOG_DEBUG+1) | |
920 | zlog_debug("postponing phased global restart: restart already in " | |
921 | "progress [%s], or outstanding child processes [%d]", | |
922 | phase_str[gs.phase],gs.numpids); | |
923 | break; | |
924 | } | |
925 | /* Is it too soon for a restart? */ | |
926 | { | |
927 | struct timeval delay; | |
928 | if (time_elapsed(&delay,&gs.special->restart.time)->tv_sec < | |
929 | gs.special->restart.interval) | |
930 | { | |
931 | if (gs.loglevel > LOG_DEBUG+1) | |
932 | zlog_debug("postponing phased global restart: " | |
933 | "elapsed time %ld < retry interval %ld", | |
934 | (long)delay.tv_sec,gs.special->restart.interval); | |
935 | break; | |
936 | } | |
937 | } | |
938 | zlog_info("Phased restart: stopping all routing daemons."); | |
939 | /* First step: stop all other daemons. */ | |
940 | for (dmn = gs.daemons; dmn; dmn = dmn->next) | |
941 | { | |
942 | if (dmn != gs.special) | |
943 | run_job(&dmn->restart,"stop",gs.stop_command,1,0); | |
944 | } | |
945 | set_phase(PHASE_STOPS_PENDING); | |
946 | break; | |
947 | default: | |
948 | zlog_err("error: unknown restart mode %d",gs.mode); | |
949 | break; | |
950 | } | |
951 | } | |
952 | ||
953 | static int | |
954 | wakeup_unresponsive(struct thread *t_wakeup) | |
955 | { | |
956 | struct daemon *dmn = THREAD_ARG(t_wakeup); | |
957 | ||
958 | dmn->t_wakeup = NULL; | |
959 | if (dmn->state != DAEMON_UNRESPONSIVE) | |
960 | zlog_err("%s: no longer unresponsive (now %s), " | |
961 | "wakeup should have been cancelled!", | |
962 | dmn->name,state_str[dmn->state]); | |
963 | else | |
964 | { | |
965 | SET_WAKEUP_UNRESPONSIVE(dmn); | |
966 | try_restart(dmn); | |
967 | } | |
968 | return 0; | |
969 | } | |
970 | ||
971 | static int | |
972 | wakeup_no_answer(struct thread *t_wakeup) | |
973 | { | |
974 | struct daemon *dmn = THREAD_ARG(t_wakeup); | |
975 | ||
976 | dmn->t_wakeup = NULL; | |
977 | dmn->state = DAEMON_UNRESPONSIVE; | |
978 | zlog_err("%s state -> unresponsive : no response yet to ping " | |
979 | "sent %ld seconds ago",dmn->name,gs.timeout); | |
980 | if (gs.unresponsive_restart) | |
981 | { | |
982 | SET_WAKEUP_UNRESPONSIVE(dmn); | |
983 | try_restart(dmn); | |
984 | } | |
985 | return 0; | |
986 | } | |
987 | ||
988 | static int | |
989 | wakeup_send_echo(struct thread *t_wakeup) | |
990 | { | |
991 | static const char echocmd[] = "echo " PING_TOKEN; | |
992 | ssize_t rc; | |
993 | struct daemon *dmn = THREAD_ARG(t_wakeup); | |
994 | ||
995 | dmn->t_wakeup = NULL; | |
996 | if (((rc = write(dmn->fd,echocmd,sizeof(echocmd))) < 0) || | |
997 | ((size_t)rc != sizeof(echocmd))) | |
998 | { | |
999 | char why[100+sizeof(echocmd)]; | |
098e240f | 1000 | snprintf(why,sizeof(why),"write '%s' returned %d instead of %u", |
1001 | echocmd,(int)rc,(u_int)sizeof(echocmd)); | |
8b886ca7 | 1002 | daemon_down(dmn,why); |
1003 | } | |
1004 | else | |
1005 | { | |
1006 | gettimeofday(&dmn->echo_sent,NULL); | |
1007 | dmn->t_wakeup = thread_add_timer(master,wakeup_no_answer,dmn,gs.timeout); | |
1008 | } | |
1009 | return 0; | |
1010 | } | |
1011 | ||
1012 | static void | |
1013 | sigint(void) | |
1014 | { | |
1015 | zlog_notice("Terminating on signal"); | |
1016 | exit(0); | |
1017 | } | |
1018 | ||
1019 | static int | |
1020 | valid_command(const char *cmd) | |
1021 | { | |
1022 | char *p; | |
1023 | ||
1024 | return ((p = strchr(cmd,'%')) != NULL) && (*(p+1) == 's') && !strchr(p+1,'%'); | |
1025 | } | |
1026 | ||
c8b40f86 | 1027 | /* This is an ugly hack to circumvent problems with passing command-line |
1028 | arguments that contain spaces. The fix is to use a configuration file. */ | |
1029 | static char * | |
1030 | translate_blanks(const char *cmd, const char *blankstr) | |
1031 | { | |
1032 | char *res; | |
1033 | char *p; | |
1034 | size_t bslen = strlen(blankstr); | |
1035 | ||
1036 | if (!(res = strdup(cmd))) | |
1037 | { | |
1038 | perror("strdup"); | |
1039 | exit(1); | |
1040 | } | |
1041 | while ((p = strstr(res,blankstr)) != NULL) | |
1042 | { | |
1043 | *p = ' '; | |
1044 | if (bslen != 1) | |
1045 | memmove(p+1,p+bslen,strlen(p+bslen)+1); | |
1046 | } | |
1047 | return res; | |
1048 | } | |
1049 | ||
8b886ca7 | 1050 | int |
1051 | main(int argc, char **argv) | |
1052 | { | |
1053 | const char *progname; | |
1054 | int opt; | |
1055 | int daemon_mode = 0; | |
1056 | const char *pidfile = DEFAULT_PIDFILE; | |
1057 | const char *special = "zebra"; | |
c8b40f86 | 1058 | const char *blankstr = NULL; |
8b886ca7 | 1059 | static struct quagga_signal_t my_signals[] = |
1060 | { | |
1061 | { | |
1062 | .signal = SIGINT, | |
1063 | .handler = sigint, | |
1064 | }, | |
1065 | { | |
1066 | .signal = SIGTERM, | |
1067 | .handler = sigint, | |
1068 | }, | |
1069 | { | |
1070 | .signal = SIGCHLD, | |
1071 | .handler = sigchild, | |
1072 | }, | |
1073 | }; | |
1074 | ||
1075 | if ((progname = strrchr (argv[0], '/')) != NULL) | |
1076 | progname++; | |
1077 | else | |
1078 | progname = argv[0]; | |
1079 | ||
098e240f | 1080 | gs.restart.name = "all"; |
c8b40f86 | 1081 | while ((opt = getopt_long(argc, argv, "aAb:dek:l:m:M:i:p:r:R:S:s:t:T:zvh", |
8b886ca7 | 1082 | longopts, 0)) != EOF) |
1083 | { | |
1084 | switch (opt) | |
1085 | { | |
1086 | case 0: | |
1087 | break; | |
1088 | case 'a': | |
1089 | if ((gs.mode != MODE_MONITOR) && (gs.mode != MODE_SEPARATE_RESTART)) | |
1090 | { | |
1091 | fputs("Ambiguous operating mode selected.\n",stderr); | |
1092 | return usage(progname,1); | |
1093 | } | |
1094 | gs.mode = MODE_PHASED_ZEBRA_RESTART; | |
1095 | break; | |
1096 | case 'A': | |
1097 | if ((gs.mode != MODE_MONITOR) && (gs.mode != MODE_SEPARATE_RESTART)) | |
1098 | { | |
1099 | fputs("Ambiguous operating mode selected.\n",stderr); | |
1100 | return usage(progname,1); | |
1101 | } | |
1102 | gs.mode = MODE_PHASED_ALL_RESTART; | |
1103 | break; | |
c8b40f86 | 1104 | case 'b': |
1105 | blankstr = optarg; | |
1106 | break; | |
8b886ca7 | 1107 | case 'd': |
1108 | daemon_mode = 1; | |
1109 | break; | |
1110 | case 'e': | |
1111 | gs.do_ping = 0; | |
1112 | break; | |
1113 | case 'k': | |
1114 | if (!valid_command(optarg)) | |
1115 | { | |
1116 | fprintf(stderr,"Invalid kill command, must contain '%%s': %s\n", | |
1117 | optarg); | |
1118 | return usage(progname,1); | |
1119 | } | |
1120 | gs.stop_command = optarg; | |
1121 | break; | |
1122 | case 'l': | |
1123 | { | |
1124 | char garbage[3]; | |
1125 | if ((sscanf(optarg,"%d%1s",&gs.loglevel,garbage) != 1) || | |
1126 | (gs.loglevel < LOG_EMERG)) | |
1127 | { | |
1128 | fprintf(stderr,"Invalid loglevel argument: %s\n",optarg); | |
1129 | return usage(progname,1); | |
1130 | } | |
1131 | } | |
1132 | break; | |
1133 | case 'm': | |
1134 | { | |
1135 | char garbage[3]; | |
1136 | if ((sscanf(optarg,"%ld%1s", | |
1137 | &gs.min_restart_interval,garbage) != 1) || | |
1138 | (gs.min_restart_interval < 0)) | |
1139 | { | |
1140 | fprintf(stderr,"Invalid min_restart_interval argument: %s\n", | |
1141 | optarg); | |
1142 | return usage(progname,1); | |
1143 | } | |
1144 | } | |
1145 | break; | |
1146 | case 'M': | |
1147 | { | |
1148 | char garbage[3]; | |
1149 | if ((sscanf(optarg,"%ld%1s", | |
1150 | &gs.max_restart_interval,garbage) != 1) || | |
1151 | (gs.max_restart_interval < 0)) | |
1152 | { | |
1153 | fprintf(stderr,"Invalid max_restart_interval argument: %s\n", | |
1154 | optarg); | |
1155 | return usage(progname,1); | |
1156 | } | |
1157 | } | |
1158 | break; | |
1159 | case 'i': | |
1160 | { | |
1161 | char garbage[3]; | |
1162 | int period; | |
1163 | if ((sscanf(optarg,"%d%1s",&period,garbage) != 1) || | |
1164 | (gs.period < 1)) | |
1165 | { | |
1166 | fprintf(stderr,"Invalid interval argument: %s\n",optarg); | |
1167 | return usage(progname,1); | |
1168 | } | |
1169 | gs.period = 1000*period; | |
1170 | } | |
1171 | break; | |
1172 | case 'p': | |
1173 | pidfile = optarg; | |
1174 | break; | |
1175 | case 'r': | |
1176 | if ((gs.mode == MODE_GLOBAL_RESTART) || | |
1177 | (gs.mode == MODE_SEPARATE_RESTART)) | |
1178 | { | |
1179 | fputs("Ambiguous operating mode selected.\n",stderr); | |
1180 | return usage(progname,1); | |
1181 | } | |
1182 | if (!valid_command(optarg)) | |
1183 | { | |
1184 | fprintf(stderr, | |
1185 | "Invalid restart command, must contain '%%s': %s\n", | |
1186 | optarg); | |
1187 | return usage(progname,1); | |
1188 | } | |
1189 | gs.restart_command = optarg; | |
1190 | if (gs.mode == MODE_MONITOR) | |
1191 | gs.mode = MODE_SEPARATE_RESTART; | |
1192 | break; | |
1193 | case 'R': | |
1194 | if (gs.mode != MODE_MONITOR) | |
1195 | { | |
1196 | fputs("Ambiguous operating mode selected.\n",stderr); | |
1197 | return usage(progname,1); | |
1198 | } | |
1199 | if (strchr(optarg,'%')) | |
1200 | { | |
1201 | fprintf(stderr, | |
1202 | "Invalid restart-all arg, must not contain '%%s': %s\n", | |
1203 | optarg); | |
1204 | return usage(progname,1); | |
1205 | } | |
1206 | gs.restart_command = optarg; | |
1207 | gs.mode = MODE_GLOBAL_RESTART; | |
1208 | break; | |
1209 | case 's': | |
1210 | if (!valid_command(optarg)) | |
1211 | { | |
1212 | fprintf(stderr,"Invalid start command, must contain '%%s': %s\n", | |
1213 | optarg); | |
1214 | return usage(progname,1); | |
1215 | } | |
1216 | gs.start_command = optarg; | |
1217 | break; | |
1218 | case 'S': | |
1219 | gs.vtydir = optarg; | |
1220 | break; | |
1221 | case 't': | |
1222 | { | |
1223 | char garbage[3]; | |
1224 | if ((sscanf(optarg,"%ld%1s",&gs.timeout,garbage) != 1) || | |
1225 | (gs.timeout < 1)) | |
1226 | { | |
1227 | fprintf(stderr,"Invalid timeout argument: %s\n",optarg); | |
1228 | return usage(progname,1); | |
1229 | } | |
1230 | } | |
1231 | break; | |
1232 | case 'T': | |
1233 | { | |
1234 | char garbage[3]; | |
1235 | if ((sscanf(optarg,"%ld%1s",&gs.restart_timeout,garbage) != 1) || | |
1236 | (gs.restart_timeout < 1)) | |
1237 | { | |
1238 | fprintf(stderr,"Invalid restart timeout argument: %s\n",optarg); | |
1239 | return usage(progname,1); | |
1240 | } | |
1241 | } | |
1242 | break; | |
1243 | case 'z': | |
1244 | gs.unresponsive_restart = 1; | |
1245 | break; | |
1246 | case 'v': | |
1247 | printf ("%s version %s\n", progname, QUAGGA_VERSION); | |
1248 | puts("Copyright 2004 Andrew J. Schorr"); | |
1249 | return 0; | |
1250 | case 'h': | |
1251 | return usage(progname,0); | |
1252 | default: | |
1253 | fputs("Invalid option.\n",stderr); | |
1254 | return usage(progname,1); | |
1255 | } | |
1256 | } | |
1257 | ||
1258 | if (gs.unresponsive_restart && (gs.mode == MODE_MONITOR)) | |
1259 | { | |
1260 | fputs("Option -z requires a -r or -R restart option.\n",stderr); | |
1261 | return usage(progname,1); | |
1262 | } | |
1263 | switch (gs.mode) | |
1264 | { | |
1265 | case MODE_MONITOR: | |
1266 | if (gs.restart_command || gs.start_command || gs.stop_command) | |
1267 | { | |
1268 | fprintf(stderr,"No kill/(re)start commands needed for %s mode.\n", | |
1269 | mode_str[gs.mode]); | |
1270 | return usage(progname,1); | |
1271 | } | |
1272 | break; | |
1273 | case MODE_GLOBAL_RESTART: | |
1274 | case MODE_SEPARATE_RESTART: | |
1275 | if (!gs.restart_command || gs.start_command || gs.stop_command) | |
1276 | { | |
1277 | fprintf(stderr,"No start/kill commands needed in [%s] mode.\n", | |
1278 | mode_str[gs.mode]); | |
1279 | return usage(progname,1); | |
1280 | } | |
1281 | break; | |
1282 | case MODE_PHASED_ZEBRA_RESTART: | |
1283 | case MODE_PHASED_ALL_RESTART: | |
1284 | if (!gs.restart_command || !gs.start_command || !gs.stop_command) | |
1285 | { | |
1286 | fprintf(stderr, | |
1287 | "Need start, kill, and restart commands in [%s] mode.\n", | |
1288 | mode_str[gs.mode]); | |
1289 | return usage(progname,1); | |
1290 | } | |
1291 | break; | |
1292 | } | |
1293 | ||
c8b40f86 | 1294 | if (blankstr) |
1295 | { | |
1296 | if (gs.restart_command) | |
1297 | gs.restart_command = translate_blanks(gs.restart_command,blankstr); | |
1298 | if (gs.start_command) | |
1299 | gs.start_command = translate_blanks(gs.start_command,blankstr); | |
1300 | if (gs.stop_command) | |
1301 | gs.stop_command = translate_blanks(gs.stop_command,blankstr); | |
1302 | } | |
1303 | ||
8b886ca7 | 1304 | gs.restart.interval = gs.min_restart_interval; |
1305 | master = thread_master_create(); | |
1306 | signal_init (master, Q_SIGC(my_signals), my_signals); | |
1307 | srandom(time(NULL)); | |
1308 | ||
1309 | { | |
1310 | int i; | |
1311 | struct daemon *tail = NULL; | |
1312 | ||
1313 | for (i = optind; i < argc; i++) | |
1314 | { | |
1315 | struct daemon *dmn; | |
1316 | ||
1317 | if (!(dmn = (struct daemon *)calloc(1,sizeof(*dmn)))) | |
1318 | { | |
098e240f | 1319 | fprintf(stderr,"calloc(1,%u) failed: %s\n", |
1320 | (u_int)sizeof(*dmn), safe_strerror(errno)); | |
8b886ca7 | 1321 | return 1; |
1322 | } | |
1323 | dmn->name = dmn->restart.name = argv[i]; | |
1324 | dmn->state = DAEMON_INIT; | |
1325 | gs.numdaemons++; | |
1326 | gs.numdown++; | |
1327 | dmn->fd = -1; | |
1328 | dmn->t_wakeup = thread_add_timer_msec(master,wakeup_init,dmn, | |
1329 | 100+(random() % 900)); | |
1330 | dmn->restart.interval = gs.min_restart_interval; | |
1331 | if (tail) | |
1332 | tail->next = dmn; | |
1333 | else | |
1334 | gs.daemons = dmn; | |
1335 | tail = dmn; | |
1336 | ||
1337 | if (((gs.mode == MODE_PHASED_ZEBRA_RESTART) || | |
1338 | (gs.mode == MODE_PHASED_ALL_RESTART)) && | |
1339 | !strcmp(dmn->name,special)) | |
1340 | gs.special = dmn; | |
1341 | } | |
1342 | } | |
1343 | if (!gs.daemons) | |
1344 | { | |
1345 | fputs("Must specify one or more daemons to monitor.\n",stderr); | |
1346 | return usage(progname,1); | |
1347 | } | |
1348 | if (((gs.mode == MODE_PHASED_ZEBRA_RESTART) || | |
1349 | (gs.mode == MODE_PHASED_ALL_RESTART)) && !gs.special) | |
1350 | { | |
1351 | fprintf(stderr,"In mode [%s], but cannot find master daemon %s\n", | |
1352 | mode_str[gs.mode],special); | |
1353 | return usage(progname,1); | |
1354 | } | |
1355 | if (gs.special && (gs.numdaemons < 2)) | |
1356 | { | |
1357 | fprintf(stderr,"Mode [%s] does not make sense with only 1 daemon " | |
1358 | "to watch.\n",mode_str[gs.mode]); | |
1359 | return usage(progname,1); | |
1360 | } | |
1361 | ||
1362 | zlog_default = openzlog(progname, ZLOG_NONE, | |
1363 | LOG_CONS|LOG_NDELAY|LOG_PID, LOG_DAEMON); | |
1364 | zlog_set_level(NULL, ZLOG_DEST_MONITOR, ZLOG_DISABLED); | |
1365 | if (daemon_mode) | |
1366 | { | |
1367 | zlog_set_level(NULL, ZLOG_DEST_SYSLOG, MIN(gs.loglevel,LOG_DEBUG)); | |
1368 | daemon(0, 0); | |
1369 | } | |
1370 | else | |
1371 | zlog_set_level(NULL, ZLOG_DEST_STDOUT, MIN(gs.loglevel,LOG_DEBUG)); | |
1372 | ||
1373 | /* Make sure we're not already running. */ | |
1374 | pid_output (pidfile); | |
1375 | ||
1376 | /* Announce which daemons are being monitored. */ | |
1377 | { | |
1378 | struct daemon *dmn; | |
1379 | size_t len = 0; | |
1380 | ||
1381 | for (dmn = gs.daemons; dmn; dmn = dmn->next) | |
1382 | len += strlen(dmn->name)+1; | |
1383 | ||
1384 | { | |
1385 | char buf[len+1]; | |
1386 | char *p = buf; | |
1387 | ||
1388 | for (dmn = gs.daemons; dmn; dmn = dmn->next) | |
1389 | { | |
1390 | if (p != buf) | |
1391 | *p++ = ' '; | |
1392 | strcpy(p,dmn->name); | |
1393 | p += strlen(p); | |
1394 | } | |
1395 | zlog_notice("%s %s watching [%s], mode [%s]", | |
1396 | progname, QUAGGA_VERSION, buf, mode_str[gs.mode]); | |
1397 | } | |
1398 | } | |
1399 | ||
1400 | { | |
1401 | struct thread thread; | |
1402 | ||
1403 | while (thread_fetch (master, &thread)) | |
1404 | thread_call (&thread); | |
1405 | } | |
1406 | ||
1407 | /* Not reached. */ | |
1408 | return 0; | |
1409 | } |