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1 | /* | |
2 | * Monitor status of frr daemons and restart if necessary. | |
3 | * | |
4 | * Copyright (C) 2004 Andrew J. Schorr | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License along | |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #include <zebra.h> | |
22 | #include <thread.h> | |
23 | #include <log.h> | |
24 | #include <network.h> | |
25 | #include <sigevent.h> | |
26 | #include <lib/version.h> | |
27 | #include "command.h" | |
28 | #include "memory_vty.h" | |
29 | #include "libfrr.h" | |
30 | #include "lib_errors.h" | |
31 | ||
32 | #include <getopt.h> | |
33 | #include <sys/un.h> | |
34 | #include <sys/wait.h> | |
35 | #include <memory.h> | |
36 | #include <systemd.h> | |
37 | ||
38 | #include "watchfrr.h" | |
39 | #include "watchfrr_errors.h" | |
40 | ||
41 | #ifndef MIN | |
42 | #define MIN(X,Y) (((X) <= (Y)) ? (X) : (Y)) | |
43 | #endif | |
44 | ||
45 | /* Macros to help randomize timers. */ | |
46 | #define JITTER(X) ((random() % ((X)+1))-((X)/2)) | |
47 | #define FUZZY(X) ((X)+JITTER((X)/20)) | |
48 | ||
49 | #define DEFAULT_PERIOD 5 | |
50 | #define DEFAULT_TIMEOUT 90 | |
51 | #define DEFAULT_RESTART_TIMEOUT 20 | |
52 | #define DEFAULT_LOGLEVEL LOG_INFO | |
53 | #define DEFAULT_MIN_RESTART 60 | |
54 | #define DEFAULT_MAX_RESTART 600 | |
55 | ||
56 | #define PING_TOKEN "PING" | |
57 | ||
58 | DEFINE_MGROUP(WATCHFRR, "watchfrr") | |
59 | DEFINE_MTYPE_STATIC(WATCHFRR, WATCHFRR_DAEMON, "watchfrr daemon entry") | |
60 | ||
61 | /* Needs to be global, referenced somewhere inside libfrr. */ | |
62 | struct thread_master *master; | |
63 | ||
64 | static bool watch_only = false; | |
65 | ||
66 | typedef enum { | |
67 | PHASE_NONE = 0, | |
68 | PHASE_INIT, | |
69 | PHASE_STOPS_PENDING, | |
70 | PHASE_WAITING_DOWN, | |
71 | PHASE_ZEBRA_RESTART_PENDING, | |
72 | PHASE_WAITING_ZEBRA_UP | |
73 | } restart_phase_t; | |
74 | ||
75 | static const char *phase_str[] = { | |
76 | "Idle", | |
77 | "Startup", | |
78 | "Stop jobs running", | |
79 | "Waiting for other daemons to come down", | |
80 | "Zebra restart job running", | |
81 | "Waiting for zebra to come up", | |
82 | "Start jobs running", | |
83 | }; | |
84 | ||
85 | #define PHASE_TIMEOUT (3*gs.restart_timeout) | |
86 | ||
87 | struct restart_info { | |
88 | const char *name; | |
89 | const char *what; | |
90 | pid_t pid; | |
91 | struct timeval time; | |
92 | long interval; | |
93 | struct thread *t_kill; | |
94 | int kills; | |
95 | }; | |
96 | ||
97 | static struct global_state { | |
98 | restart_phase_t phase; | |
99 | struct thread *t_phase_hanging; | |
100 | const char *vtydir; | |
101 | long period; | |
102 | long timeout; | |
103 | long restart_timeout; | |
104 | long min_restart_interval; | |
105 | long max_restart_interval; | |
106 | struct daemon *daemons; | |
107 | const char *restart_command; | |
108 | const char *start_command; | |
109 | const char *stop_command; | |
110 | struct restart_info restart; | |
111 | int loglevel; | |
112 | struct daemon *special; /* points to zebra when doing phased restart */ | |
113 | int numdaemons; | |
114 | int numpids; | |
115 | int numdown; /* # of daemons that are not UP or UNRESPONSIVE */ | |
116 | } gs = { | |
117 | .phase = PHASE_INIT, | |
118 | .vtydir = frr_vtydir, | |
119 | .period = 1000 * DEFAULT_PERIOD, | |
120 | .timeout = DEFAULT_TIMEOUT, | |
121 | .restart_timeout = DEFAULT_RESTART_TIMEOUT, | |
122 | .loglevel = DEFAULT_LOGLEVEL, | |
123 | .min_restart_interval = DEFAULT_MIN_RESTART, | |
124 | .max_restart_interval = DEFAULT_MAX_RESTART, | |
125 | }; | |
126 | ||
127 | typedef enum { | |
128 | DAEMON_INIT, | |
129 | DAEMON_DOWN, | |
130 | DAEMON_CONNECTING, | |
131 | DAEMON_UP, | |
132 | DAEMON_UNRESPONSIVE | |
133 | } daemon_state_t; | |
134 | ||
135 | #define IS_UP(DMN) \ | |
136 | (((DMN)->state == DAEMON_UP) || ((DMN)->state == DAEMON_UNRESPONSIVE)) | |
137 | ||
138 | static const char *state_str[] = { | |
139 | "Init", "Down", "Connecting", "Up", "Unresponsive", | |
140 | }; | |
141 | ||
142 | struct daemon { | |
143 | const char *name; | |
144 | daemon_state_t state; | |
145 | int fd; | |
146 | struct timeval echo_sent; | |
147 | unsigned int connect_tries; | |
148 | struct thread *t_wakeup; | |
149 | struct thread *t_read; | |
150 | struct thread *t_write; | |
151 | struct daemon *next; | |
152 | struct restart_info restart; | |
153 | }; | |
154 | ||
155 | #define OPTION_MINRESTART 2000 | |
156 | #define OPTION_MAXRESTART 2001 | |
157 | #define OPTION_DRY 2002 | |
158 | ||
159 | static const struct option longopts[] = { | |
160 | {"daemon", no_argument, NULL, 'd'}, | |
161 | {"statedir", required_argument, NULL, 'S'}, | |
162 | {"loglevel", required_argument, NULL, 'l'}, | |
163 | {"interval", required_argument, NULL, 'i'}, | |
164 | {"timeout", required_argument, NULL, 't'}, | |
165 | {"restart-timeout", required_argument, NULL, 'T'}, | |
166 | {"restart", required_argument, NULL, 'r'}, | |
167 | {"start-command", required_argument, NULL, 's'}, | |
168 | {"kill-command", required_argument, NULL, 'k'}, | |
169 | {"dry", no_argument, NULL, OPTION_DRY}, | |
170 | {"min-restart-interval", required_argument, NULL, OPTION_MINRESTART}, | |
171 | {"max-restart-interval", required_argument, NULL, OPTION_MAXRESTART}, | |
172 | {"pid-file", required_argument, NULL, 'p'}, | |
173 | {"blank-string", required_argument, NULL, 'b'}, | |
174 | {"help", no_argument, NULL, 'h'}, | |
175 | {"version", no_argument, NULL, 'v'}, | |
176 | {NULL, 0, NULL, 0}}; | |
177 | ||
178 | static int try_connect(struct daemon *dmn); | |
179 | static int wakeup_send_echo(struct thread *t_wakeup); | |
180 | static void try_restart(struct daemon *dmn); | |
181 | static void phase_check(void); | |
182 | static void restart_done(struct daemon *dmn); | |
183 | ||
184 | static const char *progname; | |
185 | static void printhelp(FILE *target) | |
186 | { | |
187 | fprintf(target, | |
188 | "Usage : %s [OPTION...] <daemon name> ...\n\n\ | |
189 | Watchdog program to monitor status of frr daemons and try to restart\n\ | |
190 | them if they are down or unresponsive. It determines whether a daemon is\n\ | |
191 | up based on whether it can connect to the daemon's vty unix stream socket.\n\ | |
192 | It then repeatedly sends echo commands over that socket to determine whether\n\ | |
193 | the daemon is responsive. If the daemon crashes, we will receive an EOF\n\ | |
194 | on the socket connection and know immediately that the daemon is down.\n\n\ | |
195 | The daemons to be monitored should be listed on the command line.\n\n\ | |
196 | In order to avoid attempting to restart the daemons in a fast loop,\n\ | |
197 | the -m and -M options allow you to control the minimum delay between\n\ | |
198 | restart commands. The minimum restart delay is recalculated each time\n\ | |
199 | a restart is attempted: if the time since the last restart attempt exceeds\n\ | |
200 | twice the -M value, then the restart delay is set to the -m value.\n\ | |
201 | Otherwise, the interval is doubled (but capped at the -M value).\n\n", | |
202 | progname); | |
203 | ||
204 | fprintf(target, | |
205 | "Options:\n\ | |
206 | -d, --daemon Run in daemon mode. In this mode, error messages are sent\n\ | |
207 | to syslog instead of stdout.\n\ | |
208 | -S, --statedir Set the vty socket directory (default is %s)\n\ | |
209 | -l, --loglevel Set the logging level (default is %d).\n\ | |
210 | The value should range from %d (LOG_EMERG) to %d (LOG_DEBUG),\n\ | |
211 | but it can be set higher than %d if extra-verbose debugging\n\ | |
212 | messages are desired.\n\ | |
213 | --min-restart-interval\n\ | |
214 | Set the minimum seconds to wait between invocations of daemon\n\ | |
215 | restart commands (default is %d).\n\ | |
216 | --max-restart-interval\n\ | |
217 | Set the maximum seconds to wait between invocations of daemon\n\ | |
218 | restart commands (default is %d).\n\ | |
219 | -i, --interval Set the status polling interval in seconds (default is %d)\n\ | |
220 | -t, --timeout Set the unresponsiveness timeout in seconds (default is %d)\n\ | |
221 | -T, --restart-timeout\n\ | |
222 | Set the restart (kill) timeout in seconds (default is %d).\n\ | |
223 | If any background jobs are still running after this much\n\ | |
224 | time has elapsed, they will be killed.\n\ | |
225 | -r, --restart Supply a Bourne shell command to use to restart a single\n\ | |
226 | daemon. The command string should include '%%s' where the\n\ | |
227 | name of the daemon should be substituted.\n\ | |
228 | -s, --start-command\n\ | |
229 | Supply a Bourne shell to command to use to start a single\n\ | |
230 | daemon. The command string should include '%%s' where the\n\ | |
231 | name of the daemon should be substituted.\n\ | |
232 | -k, --kill-command\n\ | |
233 | Supply a Bourne shell to command to use to stop a single\n\ | |
234 | daemon. The command string should include '%%s' where the\n\ | |
235 | name of the daemon should be substituted.\n\ | |
236 | --dry Do not start or restart anything, just log.\n\ | |
237 | -p, --pid-file Set process identifier file name\n\ | |
238 | (default is %s/watchfrr.pid).\n\ | |
239 | -b, --blank-string\n\ | |
240 | When the supplied argument string is found in any of the\n\ | |
241 | various shell command arguments (-r, -s, or -k), replace\n\ | |
242 | it with a space. This is an ugly hack to circumvent problems\n\ | |
243 | passing command-line arguments with embedded spaces.\n\ | |
244 | -v, --version Print program version\n\ | |
245 | -h, --help Display this help and exit\n", | |
246 | frr_vtydir, DEFAULT_LOGLEVEL, LOG_EMERG, LOG_DEBUG, LOG_DEBUG, | |
247 | DEFAULT_MIN_RESTART, DEFAULT_MAX_RESTART, DEFAULT_PERIOD, | |
248 | DEFAULT_TIMEOUT, DEFAULT_RESTART_TIMEOUT, frr_vtydir); | |
249 | } | |
250 | ||
251 | static pid_t run_background(char *shell_cmd) | |
252 | { | |
253 | pid_t child; | |
254 | ||
255 | switch (child = fork()) { | |
256 | case -1: | |
257 | flog_err_sys(EC_LIB_SYSTEM_CALL, | |
258 | "fork failed, cannot run command [%s]: %s", | |
259 | shell_cmd, safe_strerror(errno)); | |
260 | return -1; | |
261 | case 0: | |
262 | /* Child process. */ | |
263 | /* Use separate process group so child processes can be killed | |
264 | * easily. */ | |
265 | if (setpgid(0, 0) < 0) | |
266 | zlog_warn("warning: setpgid(0,0) failed: %s", | |
267 | safe_strerror(errno)); | |
268 | { | |
269 | char shell[] = "sh"; | |
270 | char dashc[] = "-c"; | |
271 | char *const argv[4] = {shell, dashc, shell_cmd, NULL}; | |
272 | execv("/bin/sh", argv); | |
273 | flog_err_sys(EC_LIB_SYSTEM_CALL, | |
274 | "execv(/bin/sh -c '%s') failed: %s", | |
275 | shell_cmd, safe_strerror(errno)); | |
276 | _exit(127); | |
277 | } | |
278 | default: | |
279 | /* Parent process: we will reap the child later. */ | |
280 | flog_err_sys(EC_LIB_SYSTEM_CALL, | |
281 | "Forked background command [pid %d]: %s", | |
282 | (int)child, shell_cmd); | |
283 | return child; | |
284 | } | |
285 | } | |
286 | ||
287 | static struct timeval *time_elapsed(struct timeval *result, | |
288 | const struct timeval *start_time) | |
289 | { | |
290 | gettimeofday(result, NULL); | |
291 | result->tv_sec -= start_time->tv_sec; | |
292 | result->tv_usec -= start_time->tv_usec; | |
293 | while (result->tv_usec < 0) { | |
294 | result->tv_usec += 1000000L; | |
295 | result->tv_sec--; | |
296 | } | |
297 | return result; | |
298 | } | |
299 | ||
300 | static int restart_kill(struct thread *t_kill) | |
301 | { | |
302 | struct restart_info *restart = THREAD_ARG(t_kill); | |
303 | struct timeval delay; | |
304 | ||
305 | time_elapsed(&delay, &restart->time); | |
306 | zlog_warn( | |
307 | "Warning: %s %s child process %d still running after " | |
308 | "%ld seconds, sending signal %d", | |
309 | restart->what, restart->name, (int)restart->pid, | |
310 | (long)delay.tv_sec, (restart->kills ? SIGKILL : SIGTERM)); | |
311 | kill(-restart->pid, (restart->kills ? SIGKILL : SIGTERM)); | |
312 | restart->kills++; | |
313 | restart->t_kill = NULL; | |
314 | thread_add_timer(master, restart_kill, restart, gs.restart_timeout, | |
315 | &restart->t_kill); | |
316 | return 0; | |
317 | } | |
318 | ||
319 | static struct restart_info *find_child(pid_t child) | |
320 | { | |
321 | struct daemon *dmn; | |
322 | if (gs.restart.pid == child) | |
323 | return &gs.restart; | |
324 | ||
325 | for (dmn = gs.daemons; dmn; dmn = dmn->next) { | |
326 | if (dmn->restart.pid == child) | |
327 | return &dmn->restart; | |
328 | } | |
329 | return NULL; | |
330 | } | |
331 | ||
332 | static void sigchild(void) | |
333 | { | |
334 | pid_t child; | |
335 | int status; | |
336 | const char *name; | |
337 | const char *what; | |
338 | struct restart_info *restart; | |
339 | struct daemon *dmn; | |
340 | ||
341 | switch (child = waitpid(-1, &status, WNOHANG)) { | |
342 | case -1: | |
343 | flog_err_sys(EC_LIB_SYSTEM_CALL, "waitpid failed: %s", | |
344 | safe_strerror(errno)); | |
345 | return; | |
346 | case 0: | |
347 | zlog_warn("SIGCHLD received, but waitpid did not reap a child"); | |
348 | return; | |
349 | } | |
350 | ||
351 | if (child == integrated_write_pid) { | |
352 | integrated_write_sigchld(status); | |
353 | return; | |
354 | } | |
355 | ||
356 | if ((restart = find_child(child)) != NULL) { | |
357 | name = restart->name; | |
358 | what = restart->what; | |
359 | restart->pid = 0; | |
360 | gs.numpids--; | |
361 | thread_cancel(restart->t_kill); | |
362 | restart->t_kill = NULL; | |
363 | /* Update restart time to reflect the time the command | |
364 | * completed. */ | |
365 | gettimeofday(&restart->time, NULL); | |
366 | } else { | |
367 | flog_err_sys( | |
368 | EC_LIB_SYSTEM_CALL, | |
369 | "waitpid returned status for an unknown child process %d", | |
370 | (int)child); | |
371 | name = "(unknown)"; | |
372 | what = "background"; | |
373 | } | |
374 | if (WIFSTOPPED(status)) | |
375 | zlog_warn("warning: %s %s process %d is stopped", what, name, | |
376 | (int)child); | |
377 | else if (WIFSIGNALED(status)) | |
378 | zlog_warn("%s %s process %d terminated due to signal %d", what, | |
379 | name, (int)child, WTERMSIG(status)); | |
380 | else if (WIFEXITED(status)) { | |
381 | if (WEXITSTATUS(status) != 0) | |
382 | zlog_warn( | |
383 | "%s %s process %d exited with non-zero status %d", | |
384 | what, name, (int)child, WEXITSTATUS(status)); | |
385 | else { | |
386 | zlog_debug("%s %s process %d exited normally", what, | |
387 | name, (int)child); | |
388 | ||
389 | if (restart && restart != &gs.restart) { | |
390 | dmn = container_of(restart, struct daemon, | |
391 | restart); | |
392 | restart_done(dmn); | |
393 | } else if (restart) | |
394 | for (dmn = gs.daemons; dmn; dmn = dmn->next) | |
395 | restart_done(dmn); | |
396 | } | |
397 | } else | |
398 | flog_err_sys( | |
399 | EC_LIB_SYSTEM_CALL, | |
400 | "cannot interpret %s %s process %d wait status 0x%x", | |
401 | what, name, (int)child, status); | |
402 | phase_check(); | |
403 | } | |
404 | ||
405 | static int run_job(struct restart_info *restart, const char *cmdtype, | |
406 | const char *command, int force, int update_interval) | |
407 | { | |
408 | struct timeval delay; | |
409 | ||
410 | if (gs.loglevel > LOG_DEBUG + 1) | |
411 | zlog_debug("attempting to %s %s", cmdtype, restart->name); | |
412 | ||
413 | if (restart->pid) { | |
414 | if (gs.loglevel > LOG_DEBUG + 1) | |
415 | zlog_debug( | |
416 | "cannot %s %s, previous pid %d still running", | |
417 | cmdtype, restart->name, (int)restart->pid); | |
418 | return -1; | |
419 | } | |
420 | ||
421 | /* Note: time_elapsed test must come before the force test, since we | |
422 | need | |
423 | to make sure that delay is initialized for use below in updating the | |
424 | restart interval. */ | |
425 | if ((time_elapsed(&delay, &restart->time)->tv_sec < restart->interval) | |
426 | && !force) { | |
427 | if (gs.loglevel > LOG_DEBUG + 1) | |
428 | zlog_debug( | |
429 | "postponing %s %s: " | |
430 | "elapsed time %ld < retry interval %ld", | |
431 | cmdtype, restart->name, (long)delay.tv_sec, | |
432 | restart->interval); | |
433 | return -1; | |
434 | } | |
435 | ||
436 | gettimeofday(&restart->time, NULL); | |
437 | restart->kills = 0; | |
438 | { | |
439 | char cmd[strlen(command) + strlen(restart->name) + 1]; | |
440 | snprintf(cmd, sizeof(cmd), command, restart->name); | |
441 | if ((restart->pid = run_background(cmd)) > 0) { | |
442 | restart->t_kill = NULL; | |
443 | thread_add_timer(master, restart_kill, restart, | |
444 | gs.restart_timeout, &restart->t_kill); | |
445 | restart->what = cmdtype; | |
446 | gs.numpids++; | |
447 | } else | |
448 | restart->pid = 0; | |
449 | } | |
450 | ||
451 | /* Calculate the new restart interval. */ | |
452 | if (update_interval) { | |
453 | if (delay.tv_sec > 2 * gs.max_restart_interval) | |
454 | restart->interval = gs.min_restart_interval; | |
455 | else if ((restart->interval *= 2) > gs.max_restart_interval) | |
456 | restart->interval = gs.max_restart_interval; | |
457 | if (gs.loglevel > LOG_DEBUG + 1) | |
458 | zlog_debug("restart %s interval is now %ld", | |
459 | restart->name, restart->interval); | |
460 | } | |
461 | return restart->pid; | |
462 | } | |
463 | ||
464 | #define SET_READ_HANDLER(DMN) \ | |
465 | do { \ | |
466 | (DMN)->t_read = NULL; \ | |
467 | thread_add_read(master, handle_read, (DMN), (DMN)->fd, \ | |
468 | &(DMN)->t_read); \ | |
469 | } while (0); | |
470 | ||
471 | #define SET_WAKEUP_DOWN(DMN) \ | |
472 | do { \ | |
473 | (DMN)->t_wakeup = NULL; \ | |
474 | thread_add_timer_msec(master, wakeup_down, (DMN), \ | |
475 | FUZZY(gs.period), &(DMN)->t_wakeup); \ | |
476 | } while (0); | |
477 | ||
478 | #define SET_WAKEUP_UNRESPONSIVE(DMN) \ | |
479 | do { \ | |
480 | (DMN)->t_wakeup = NULL; \ | |
481 | thread_add_timer_msec(master, wakeup_unresponsive, (DMN), \ | |
482 | FUZZY(gs.period), &(DMN)->t_wakeup); \ | |
483 | } while (0); | |
484 | ||
485 | #define SET_WAKEUP_ECHO(DMN) \ | |
486 | do { \ | |
487 | (DMN)->t_wakeup = NULL; \ | |
488 | thread_add_timer_msec(master, wakeup_send_echo, (DMN), \ | |
489 | FUZZY(gs.period), &(DMN)->t_wakeup); \ | |
490 | } while (0); | |
491 | ||
492 | static int wakeup_down(struct thread *t_wakeup) | |
493 | { | |
494 | struct daemon *dmn = THREAD_ARG(t_wakeup); | |
495 | ||
496 | dmn->t_wakeup = NULL; | |
497 | if (try_connect(dmn) < 0) | |
498 | SET_WAKEUP_DOWN(dmn); | |
499 | if ((dmn->connect_tries > 1) && (dmn->state != DAEMON_UP)) | |
500 | try_restart(dmn); | |
501 | return 0; | |
502 | } | |
503 | ||
504 | static int wakeup_init(struct thread *t_wakeup) | |
505 | { | |
506 | struct daemon *dmn = THREAD_ARG(t_wakeup); | |
507 | ||
508 | dmn->t_wakeup = NULL; | |
509 | if (try_connect(dmn) < 0) { | |
510 | flog_err(EC_WATCHFRR_CONNECTION, | |
511 | "%s state -> down : initial connection attempt failed", | |
512 | dmn->name); | |
513 | dmn->state = DAEMON_DOWN; | |
514 | } | |
515 | phase_check(); | |
516 | return 0; | |
517 | } | |
518 | ||
519 | static void restart_done(struct daemon *dmn) | |
520 | { | |
521 | if (dmn->state != DAEMON_DOWN) { | |
522 | zlog_warn("wtf?"); | |
523 | return; | |
524 | } | |
525 | if (dmn->t_wakeup) | |
526 | THREAD_OFF(dmn->t_wakeup); | |
527 | if (try_connect(dmn) < 0) | |
528 | SET_WAKEUP_DOWN(dmn); | |
529 | } | |
530 | ||
531 | static void daemon_down(struct daemon *dmn, const char *why) | |
532 | { | |
533 | if (IS_UP(dmn) || (dmn->state == DAEMON_INIT)) | |
534 | flog_err(EC_WATCHFRR_CONNECTION, "%s state -> down : %s", | |
535 | dmn->name, why); | |
536 | else if (gs.loglevel > LOG_DEBUG) | |
537 | zlog_debug("%s still down : %s", dmn->name, why); | |
538 | if (IS_UP(dmn)) | |
539 | gs.numdown++; | |
540 | dmn->state = DAEMON_DOWN; | |
541 | if (dmn->fd >= 0) { | |
542 | close(dmn->fd); | |
543 | dmn->fd = -1; | |
544 | } | |
545 | THREAD_OFF(dmn->t_read); | |
546 | THREAD_OFF(dmn->t_write); | |
547 | THREAD_OFF(dmn->t_wakeup); | |
548 | if (try_connect(dmn) < 0) | |
549 | SET_WAKEUP_DOWN(dmn); | |
550 | phase_check(); | |
551 | } | |
552 | ||
553 | static int handle_read(struct thread *t_read) | |
554 | { | |
555 | struct daemon *dmn = THREAD_ARG(t_read); | |
556 | static const char resp[sizeof(PING_TOKEN) + 4] = PING_TOKEN "\n"; | |
557 | char buf[sizeof(resp) + 100]; | |
558 | ssize_t rc; | |
559 | struct timeval delay; | |
560 | ||
561 | dmn->t_read = NULL; | |
562 | if ((rc = read(dmn->fd, buf, sizeof(buf))) < 0) { | |
563 | char why[100]; | |
564 | ||
565 | if (ERRNO_IO_RETRY(errno)) { | |
566 | /* Pretend it never happened. */ | |
567 | SET_READ_HANDLER(dmn); | |
568 | return 0; | |
569 | } | |
570 | snprintf(why, sizeof(why), "unexpected read error: %s", | |
571 | safe_strerror(errno)); | |
572 | daemon_down(dmn, why); | |
573 | return 0; | |
574 | } | |
575 | if (rc == 0) { | |
576 | daemon_down(dmn, "read returned EOF"); | |
577 | return 0; | |
578 | } | |
579 | if (!dmn->echo_sent.tv_sec) { | |
580 | char why[sizeof(buf) + 100]; | |
581 | snprintf(why, sizeof(why), | |
582 | "unexpected read returns %d bytes: %.*s", (int)rc, | |
583 | (int)rc, buf); | |
584 | daemon_down(dmn, why); | |
585 | return 0; | |
586 | } | |
587 | ||
588 | /* We are expecting an echo response: is there any chance that the | |
589 | response would not be returned entirely in the first read? That | |
590 | seems inconceivable... */ | |
591 | if ((rc != sizeof(resp)) || memcmp(buf, resp, sizeof(resp))) { | |
592 | char why[100 + sizeof(buf)]; | |
593 | snprintf(why, sizeof(why), | |
594 | "read returned bad echo response of %d bytes " | |
595 | "(expecting %u): %.*s", | |
596 | (int)rc, (unsigned int)sizeof(resp), (int)rc, buf); | |
597 | daemon_down(dmn, why); | |
598 | return 0; | |
599 | } | |
600 | ||
601 | time_elapsed(&delay, &dmn->echo_sent); | |
602 | dmn->echo_sent.tv_sec = 0; | |
603 | if (dmn->state == DAEMON_UNRESPONSIVE) { | |
604 | if (delay.tv_sec < gs.timeout) { | |
605 | dmn->state = DAEMON_UP; | |
606 | zlog_warn( | |
607 | "%s state -> up : echo response received after %ld.%06ld " | |
608 | "seconds", | |
609 | dmn->name, (long)delay.tv_sec, | |
610 | (long)delay.tv_usec); | |
611 | } else | |
612 | zlog_warn( | |
613 | "%s: slow echo response finally received after %ld.%06ld " | |
614 | "seconds", | |
615 | dmn->name, (long)delay.tv_sec, | |
616 | (long)delay.tv_usec); | |
617 | } else if (gs.loglevel > LOG_DEBUG + 1) | |
618 | zlog_debug("%s: echo response received after %ld.%06ld seconds", | |
619 | dmn->name, (long)delay.tv_sec, (long)delay.tv_usec); | |
620 | ||
621 | SET_READ_HANDLER(dmn); | |
622 | if (dmn->t_wakeup) | |
623 | thread_cancel(dmn->t_wakeup); | |
624 | SET_WAKEUP_ECHO(dmn); | |
625 | ||
626 | return 0; | |
627 | } | |
628 | ||
629 | /* | |
630 | * Wait till we notice that all daemons are ready before | |
631 | * we send we are ready to systemd | |
632 | */ | |
633 | static void daemon_send_ready(void) | |
634 | { | |
635 | static int sent = 0; | |
636 | if (!sent && gs.numdown == 0) { | |
637 | FILE *fp; | |
638 | ||
639 | zlog_notice("all daemons up, doing startup-complete notify"); | |
640 | frr_detach(); | |
641 | ||
642 | fp = fopen(DAEMON_VTY_DIR "/watchfrr.started", "w"); | |
643 | if (fp) | |
644 | fclose(fp); | |
645 | #if defined HAVE_SYSTEMD | |
646 | systemd_send_started(master, 0); | |
647 | #endif | |
648 | sent = 1; | |
649 | } | |
650 | } | |
651 | ||
652 | static void daemon_up(struct daemon *dmn, const char *why) | |
653 | { | |
654 | dmn->state = DAEMON_UP; | |
655 | gs.numdown--; | |
656 | dmn->connect_tries = 0; | |
657 | zlog_notice("%s state -> up : %s", dmn->name, why); | |
658 | daemon_send_ready(); | |
659 | SET_WAKEUP_ECHO(dmn); | |
660 | phase_check(); | |
661 | } | |
662 | ||
663 | static int check_connect(struct thread *t_write) | |
664 | { | |
665 | struct daemon *dmn = THREAD_ARG(t_write); | |
666 | int sockerr; | |
667 | socklen_t reslen = sizeof(sockerr); | |
668 | ||
669 | dmn->t_write = NULL; | |
670 | if (getsockopt(dmn->fd, SOL_SOCKET, SO_ERROR, (char *)&sockerr, &reslen) | |
671 | < 0) { | |
672 | zlog_warn("%s: check_connect: getsockopt failed: %s", dmn->name, | |
673 | safe_strerror(errno)); | |
674 | daemon_down(dmn, | |
675 | "getsockopt failed checking connection success"); | |
676 | return 0; | |
677 | } | |
678 | if ((reslen == sizeof(sockerr)) && sockerr) { | |
679 | char why[100]; | |
680 | snprintf( | |
681 | why, sizeof(why), | |
682 | "getsockopt reports that connection attempt failed: %s", | |
683 | safe_strerror(sockerr)); | |
684 | daemon_down(dmn, why); | |
685 | return 0; | |
686 | } | |
687 | ||
688 | daemon_up(dmn, "delayed connect succeeded"); | |
689 | return 0; | |
690 | } | |
691 | ||
692 | static int wakeup_connect_hanging(struct thread *t_wakeup) | |
693 | { | |
694 | struct daemon *dmn = THREAD_ARG(t_wakeup); | |
695 | char why[100]; | |
696 | ||
697 | dmn->t_wakeup = NULL; | |
698 | snprintf(why, sizeof(why), | |
699 | "connection attempt timed out after %ld seconds", gs.timeout); | |
700 | daemon_down(dmn, why); | |
701 | return 0; | |
702 | } | |
703 | ||
704 | /* Making connection to protocol daemon. */ | |
705 | static int try_connect(struct daemon *dmn) | |
706 | { | |
707 | int sock; | |
708 | struct sockaddr_un addr; | |
709 | socklen_t len; | |
710 | ||
711 | if (gs.loglevel > LOG_DEBUG + 1) | |
712 | zlog_debug("%s: attempting to connect", dmn->name); | |
713 | dmn->connect_tries++; | |
714 | ||
715 | memset(&addr, 0, sizeof(struct sockaddr_un)); | |
716 | addr.sun_family = AF_UNIX; | |
717 | snprintf(addr.sun_path, sizeof(addr.sun_path), "%s/%s.vty", gs.vtydir, | |
718 | dmn->name); | |
719 | #ifdef HAVE_STRUCT_SOCKADDR_UN_SUN_LEN | |
720 | len = addr.sun_len = SUN_LEN(&addr); | |
721 | #else | |
722 | len = sizeof(addr.sun_family) + strlen(addr.sun_path); | |
723 | #endif /* HAVE_STRUCT_SOCKADDR_UN_SUN_LEN */ | |
724 | ||
725 | /* Quick check to see if we might succeed before we go to the trouble | |
726 | of creating a socket. */ | |
727 | if (access(addr.sun_path, W_OK) < 0) { | |
728 | if (errno != ENOENT) | |
729 | flog_err_sys(EC_LIB_SYSTEM_CALL, | |
730 | "%s: access to socket %s denied: %s", | |
731 | dmn->name, addr.sun_path, | |
732 | safe_strerror(errno)); | |
733 | return -1; | |
734 | } | |
735 | ||
736 | if ((sock = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) { | |
737 | flog_err_sys(EC_LIB_SOCKET, "%s(%s): cannot make socket: %s", | |
738 | __func__, addr.sun_path, safe_strerror(errno)); | |
739 | return -1; | |
740 | } | |
741 | ||
742 | if (set_nonblocking(sock) < 0 || set_cloexec(sock) < 0) { | |
743 | flog_err_sys(EC_LIB_SYSTEM_CALL, | |
744 | "%s(%s): set_nonblocking/cloexec(%d) failed", | |
745 | __func__, addr.sun_path, sock); | |
746 | close(sock); | |
747 | return -1; | |
748 | } | |
749 | ||
750 | if (connect(sock, (struct sockaddr *)&addr, len) < 0) { | |
751 | if ((errno != EINPROGRESS) && (errno != EWOULDBLOCK)) { | |
752 | if (gs.loglevel > LOG_DEBUG) | |
753 | zlog_debug("%s(%s): connect failed: %s", | |
754 | __func__, addr.sun_path, | |
755 | safe_strerror(errno)); | |
756 | close(sock); | |
757 | return -1; | |
758 | } | |
759 | if (gs.loglevel > LOG_DEBUG) | |
760 | zlog_debug("%s: connection in progress", dmn->name); | |
761 | dmn->state = DAEMON_CONNECTING; | |
762 | dmn->fd = sock; | |
763 | dmn->t_write = NULL; | |
764 | thread_add_write(master, check_connect, dmn, dmn->fd, | |
765 | &dmn->t_write); | |
766 | dmn->t_wakeup = NULL; | |
767 | thread_add_timer(master, wakeup_connect_hanging, dmn, | |
768 | gs.timeout, &dmn->t_wakeup); | |
769 | SET_READ_HANDLER(dmn); | |
770 | return 0; | |
771 | } | |
772 | ||
773 | dmn->fd = sock; | |
774 | SET_READ_HANDLER(dmn); | |
775 | daemon_up(dmn, "connect succeeded"); | |
776 | return 1; | |
777 | } | |
778 | ||
779 | static int phase_hanging(struct thread *t_hanging) | |
780 | { | |
781 | gs.t_phase_hanging = NULL; | |
782 | flog_err(EC_WATCHFRR_CONNECTION, | |
783 | "Phase [%s] hanging for %ld seconds, aborting phased restart", | |
784 | phase_str[gs.phase], PHASE_TIMEOUT); | |
785 | gs.phase = PHASE_NONE; | |
786 | return 0; | |
787 | } | |
788 | ||
789 | static void set_phase(restart_phase_t new_phase) | |
790 | { | |
791 | gs.phase = new_phase; | |
792 | if (gs.t_phase_hanging) | |
793 | thread_cancel(gs.t_phase_hanging); | |
794 | gs.t_phase_hanging = NULL; | |
795 | thread_add_timer(master, phase_hanging, NULL, PHASE_TIMEOUT, | |
796 | &gs.t_phase_hanging); | |
797 | } | |
798 | ||
799 | static void phase_check(void) | |
800 | { | |
801 | struct daemon *dmn; | |
802 | ||
803 | switch (gs.phase) { | |
804 | case PHASE_NONE: | |
805 | break; | |
806 | ||
807 | case PHASE_INIT: | |
808 | for (dmn = gs.daemons; dmn; dmn = dmn->next) | |
809 | if (dmn->state == DAEMON_INIT) | |
810 | return; | |
811 | ||
812 | /* startup complete, everything out of INIT */ | |
813 | gs.phase = PHASE_NONE; | |
814 | for (dmn = gs.daemons; dmn; dmn = dmn->next) | |
815 | if (dmn->state == DAEMON_DOWN) { | |
816 | SET_WAKEUP_DOWN(dmn); | |
817 | try_restart(dmn); | |
818 | } | |
819 | break; | |
820 | case PHASE_STOPS_PENDING: | |
821 | if (gs.numpids) | |
822 | break; | |
823 | zlog_info( | |
824 | "Phased restart: all routing daemon stop jobs have completed."); | |
825 | set_phase(PHASE_WAITING_DOWN); | |
826 | ||
827 | /*FALLTHRU*/ | |
828 | case PHASE_WAITING_DOWN: | |
829 | if (gs.numdown + IS_UP(gs.special) < gs.numdaemons) | |
830 | break; | |
831 | zlog_info("Phased restart: all routing daemons now down."); | |
832 | run_job(&gs.special->restart, "restart", gs.restart_command, 1, | |
833 | 1); | |
834 | set_phase(PHASE_ZEBRA_RESTART_PENDING); | |
835 | ||
836 | /*FALLTHRU*/ | |
837 | case PHASE_ZEBRA_RESTART_PENDING: | |
838 | if (gs.special->restart.pid) | |
839 | break; | |
840 | zlog_info("Phased restart: %s restart job completed.", | |
841 | gs.special->name); | |
842 | set_phase(PHASE_WAITING_ZEBRA_UP); | |
843 | ||
844 | /*FALLTHRU*/ | |
845 | case PHASE_WAITING_ZEBRA_UP: | |
846 | if (!IS_UP(gs.special)) | |
847 | break; | |
848 | zlog_info("Phased restart: %s is now up.", gs.special->name); | |
849 | { | |
850 | struct daemon *dmn; | |
851 | for (dmn = gs.daemons; dmn; dmn = dmn->next) { | |
852 | if (dmn != gs.special) | |
853 | run_job(&dmn->restart, "start", | |
854 | gs.start_command, 1, 0); | |
855 | } | |
856 | } | |
857 | gs.phase = PHASE_NONE; | |
858 | THREAD_OFF(gs.t_phase_hanging); | |
859 | zlog_notice("Phased global restart has completed."); | |
860 | break; | |
861 | } | |
862 | } | |
863 | ||
864 | static void try_restart(struct daemon *dmn) | |
865 | { | |
866 | if (watch_only) | |
867 | return; | |
868 | ||
869 | if (dmn != gs.special) { | |
870 | if ((gs.special->state == DAEMON_UP) | |
871 | && (gs.phase == PHASE_NONE)) | |
872 | run_job(&dmn->restart, "restart", gs.restart_command, 0, | |
873 | 1); | |
874 | else | |
875 | zlog_debug( | |
876 | "%s: postponing restart attempt because master %s daemon " | |
877 | "not up [%s], or phased restart in progress", | |
878 | dmn->name, gs.special->name, | |
879 | state_str[gs.special->state]); | |
880 | return; | |
881 | } | |
882 | ||
883 | if ((gs.phase != PHASE_NONE) || gs.numpids) { | |
884 | if (gs.loglevel > LOG_DEBUG + 1) | |
885 | zlog_debug( | |
886 | "postponing phased global restart: restart already in " | |
887 | "progress [%s], or outstanding child processes [%d]", | |
888 | phase_str[gs.phase], gs.numpids); | |
889 | return; | |
890 | } | |
891 | /* Is it too soon for a restart? */ | |
892 | { | |
893 | struct timeval delay; | |
894 | if (time_elapsed(&delay, &gs.special->restart.time)->tv_sec | |
895 | < gs.special->restart.interval) { | |
896 | if (gs.loglevel > LOG_DEBUG + 1) | |
897 | zlog_debug( | |
898 | "postponing phased global restart: " | |
899 | "elapsed time %ld < retry interval %ld", | |
900 | (long)delay.tv_sec, | |
901 | gs.special->restart.interval); | |
902 | return; | |
903 | } | |
904 | } | |
905 | run_job(&gs.restart, "restart", gs.restart_command, 0, 1); | |
906 | } | |
907 | ||
908 | static int wakeup_unresponsive(struct thread *t_wakeup) | |
909 | { | |
910 | struct daemon *dmn = THREAD_ARG(t_wakeup); | |
911 | ||
912 | dmn->t_wakeup = NULL; | |
913 | if (dmn->state != DAEMON_UNRESPONSIVE) | |
914 | flog_err(EC_WATCHFRR_CONNECTION, | |
915 | "%s: no longer unresponsive (now %s), " | |
916 | "wakeup should have been cancelled!", | |
917 | dmn->name, state_str[dmn->state]); | |
918 | else { | |
919 | SET_WAKEUP_UNRESPONSIVE(dmn); | |
920 | try_restart(dmn); | |
921 | } | |
922 | return 0; | |
923 | } | |
924 | ||
925 | static int wakeup_no_answer(struct thread *t_wakeup) | |
926 | { | |
927 | struct daemon *dmn = THREAD_ARG(t_wakeup); | |
928 | ||
929 | dmn->t_wakeup = NULL; | |
930 | dmn->state = DAEMON_UNRESPONSIVE; | |
931 | flog_err(EC_WATCHFRR_CONNECTION, | |
932 | "%s state -> unresponsive : no response yet to ping " | |
933 | "sent %ld seconds ago", | |
934 | dmn->name, gs.timeout); | |
935 | SET_WAKEUP_UNRESPONSIVE(dmn); | |
936 | try_restart(dmn); | |
937 | return 0; | |
938 | } | |
939 | ||
940 | static int wakeup_send_echo(struct thread *t_wakeup) | |
941 | { | |
942 | static const char echocmd[] = "echo " PING_TOKEN; | |
943 | ssize_t rc; | |
944 | struct daemon *dmn = THREAD_ARG(t_wakeup); | |
945 | ||
946 | dmn->t_wakeup = NULL; | |
947 | if (((rc = write(dmn->fd, echocmd, sizeof(echocmd))) < 0) | |
948 | || ((size_t)rc != sizeof(echocmd))) { | |
949 | char why[100 + sizeof(echocmd)]; | |
950 | snprintf(why, sizeof(why), | |
951 | "write '%s' returned %d instead of %u", echocmd, | |
952 | (int)rc, (unsigned int)sizeof(echocmd)); | |
953 | daemon_down(dmn, why); | |
954 | } else { | |
955 | gettimeofday(&dmn->echo_sent, NULL); | |
956 | dmn->t_wakeup = NULL; | |
957 | thread_add_timer(master, wakeup_no_answer, dmn, gs.timeout, | |
958 | &dmn->t_wakeup); | |
959 | } | |
960 | return 0; | |
961 | } | |
962 | ||
963 | bool check_all_up(void) | |
964 | { | |
965 | struct daemon *dmn; | |
966 | ||
967 | for (dmn = gs.daemons; dmn; dmn = dmn->next) | |
968 | if (dmn->state != DAEMON_UP) | |
969 | return false; | |
970 | return true; | |
971 | } | |
972 | ||
973 | void watchfrr_status(struct vty *vty) | |
974 | { | |
975 | struct daemon *dmn; | |
976 | struct timeval delay; | |
977 | ||
978 | vty_out(vty, "watchfrr global phase: %s\n", phase_str[gs.phase]); | |
979 | if (gs.restart.pid) | |
980 | vty_out(vty, " global restart running, pid %ld\n", | |
981 | (long)gs.restart.pid); | |
982 | ||
983 | for (dmn = gs.daemons; dmn; dmn = dmn->next) { | |
984 | vty_out(vty, " %-20s %s\n", dmn->name, state_str[dmn->state]); | |
985 | if (dmn->restart.pid) | |
986 | vty_out(vty, " restart running, pid %ld\n", | |
987 | (long)dmn->restart.pid); | |
988 | else if (dmn->state == DAEMON_DOWN && | |
989 | time_elapsed(&delay, &dmn->restart.time)->tv_sec | |
990 | < dmn->restart.interval) | |
991 | vty_out(vty, " restarting in %ld seconds" | |
992 | " (%lds backoff interval)\n", | |
993 | dmn->restart.interval - delay.tv_sec, | |
994 | dmn->restart.interval); | |
995 | } | |
996 | } | |
997 | ||
998 | static void sigint(void) | |
999 | { | |
1000 | zlog_notice("Terminating on signal"); | |
1001 | systemd_send_stopping(); | |
1002 | exit(0); | |
1003 | } | |
1004 | ||
1005 | static int valid_command(const char *cmd) | |
1006 | { | |
1007 | char *p; | |
1008 | ||
1009 | return ((p = strchr(cmd, '%')) != NULL) && (*(p + 1) == 's') | |
1010 | && !strchr(p + 1, '%'); | |
1011 | } | |
1012 | ||
1013 | /* This is an ugly hack to circumvent problems with passing command-line | |
1014 | arguments that contain spaces. The fix is to use a configuration file. */ | |
1015 | static char *translate_blanks(const char *cmd, const char *blankstr) | |
1016 | { | |
1017 | char *res; | |
1018 | char *p; | |
1019 | size_t bslen = strlen(blankstr); | |
1020 | ||
1021 | if (!(res = strdup(cmd))) { | |
1022 | perror("strdup"); | |
1023 | exit(1); | |
1024 | } | |
1025 | while ((p = strstr(res, blankstr)) != NULL) { | |
1026 | *p = ' '; | |
1027 | if (bslen != 1) | |
1028 | memmove(p + 1, p + bslen, strlen(p + bslen) + 1); | |
1029 | } | |
1030 | return res; | |
1031 | } | |
1032 | ||
1033 | static void watchfrr_init(int argc, char **argv) | |
1034 | { | |
1035 | const char *special = "zebra"; | |
1036 | int i; | |
1037 | struct daemon *dmn, **add = &gs.daemons; | |
1038 | char alldaemons[512] = "", *p = alldaemons; | |
1039 | ||
1040 | for (i = optind; i < argc; i++) { | |
1041 | dmn = XCALLOC(MTYPE_WATCHFRR_DAEMON, sizeof(*dmn)); | |
1042 | ||
1043 | dmn->name = dmn->restart.name = argv[i]; | |
1044 | dmn->state = DAEMON_INIT; | |
1045 | gs.numdaemons++; | |
1046 | gs.numdown++; | |
1047 | dmn->fd = -1; | |
1048 | dmn->t_wakeup = NULL; | |
1049 | thread_add_timer_msec(master, wakeup_init, dmn, 0, | |
1050 | &dmn->t_wakeup); | |
1051 | dmn->restart.interval = gs.min_restart_interval; | |
1052 | *add = dmn; | |
1053 | add = &dmn->next; | |
1054 | ||
1055 | if (!strcmp(dmn->name, special)) | |
1056 | gs.special = dmn; | |
1057 | } | |
1058 | ||
1059 | if (!gs.daemons) { | |
1060 | fprintf(stderr, | |
1061 | "Must specify one or more daemons to monitor.\n\n"); | |
1062 | frr_help_exit(1); | |
1063 | } | |
1064 | if (!watch_only && !gs.special) { | |
1065 | fprintf(stderr, "\"%s\" daemon must be in daemon lists\n\n", | |
1066 | special); | |
1067 | frr_help_exit(1); | |
1068 | } | |
1069 | ||
1070 | for (dmn = gs.daemons; dmn; dmn = dmn->next) { | |
1071 | snprintf(p, alldaemons + sizeof(alldaemons) - p, "%s%s", | |
1072 | (p == alldaemons) ? "" : " ", dmn->name); | |
1073 | p += strlen(p); | |
1074 | } | |
1075 | zlog_notice("%s %s watching [%s]%s", progname, FRR_VERSION, alldaemons, | |
1076 | watch_only ? ", monitor mode" : ""); | |
1077 | } | |
1078 | ||
1079 | struct zebra_privs_t watchfrr_privs = { | |
1080 | #ifdef VTY_GROUP | |
1081 | .vty_group = VTY_GROUP, | |
1082 | #endif | |
1083 | }; | |
1084 | ||
1085 | static struct quagga_signal_t watchfrr_signals[] = { | |
1086 | { | |
1087 | .signal = SIGINT, | |
1088 | .handler = sigint, | |
1089 | }, | |
1090 | { | |
1091 | .signal = SIGTERM, | |
1092 | .handler = sigint, | |
1093 | }, | |
1094 | { | |
1095 | .signal = SIGCHLD, | |
1096 | .handler = sigchild, | |
1097 | }, | |
1098 | }; | |
1099 | ||
1100 | FRR_DAEMON_INFO(watchfrr, WATCHFRR, | |
1101 | .flags = FRR_NO_PRIVSEP | FRR_NO_TCPVTY | FRR_LIMITED_CLI | |
1102 | | FRR_NO_CFG_PID_DRY | FRR_NO_ZCLIENT | |
1103 | | FRR_DETACH_LATER, | |
1104 | ||
1105 | .printhelp = printhelp, | |
1106 | .copyright = "Copyright 2004 Andrew J. Schorr", | |
1107 | ||
1108 | .signals = watchfrr_signals, | |
1109 | .n_signals = array_size(watchfrr_signals), | |
1110 | ||
1111 | .privs = &watchfrr_privs, ) | |
1112 | ||
1113 | #define DEPRECATED_OPTIONS "aAezR:" | |
1114 | ||
1115 | int main(int argc, char **argv) | |
1116 | { | |
1117 | int opt; | |
1118 | const char *blankstr = NULL; | |
1119 | ||
1120 | frr_preinit(&watchfrr_di, argc, argv); | |
1121 | progname = watchfrr_di.progname; | |
1122 | ||
1123 | frr_opt_add("b:dk:l:i:p:r:S:s:t:T:" DEPRECATED_OPTIONS, longopts, ""); | |
1124 | ||
1125 | gs.restart.name = "all"; | |
1126 | while ((opt = frr_getopt(argc, argv, NULL)) != EOF) { | |
1127 | if (opt && opt < 128 && strchr(DEPRECATED_OPTIONS, opt)) { | |
1128 | fprintf(stderr, | |
1129 | "The -%c option no longer exists.\n" | |
1130 | "Please refer to the watchfrr(8) man page.\n", | |
1131 | opt); | |
1132 | exit(1); | |
1133 | } | |
1134 | ||
1135 | switch (opt) { | |
1136 | case 0: | |
1137 | break; | |
1138 | case 'b': | |
1139 | blankstr = optarg; | |
1140 | break; | |
1141 | case OPTION_DRY: | |
1142 | watch_only = true; | |
1143 | break; | |
1144 | case 'k': | |
1145 | if (!valid_command(optarg)) { | |
1146 | fprintf(stderr, | |
1147 | "Invalid kill command, must contain '%%s': %s\n", | |
1148 | optarg); | |
1149 | frr_help_exit(1); | |
1150 | } | |
1151 | gs.stop_command = optarg; | |
1152 | break; | |
1153 | case 'l': { | |
1154 | char garbage[3]; | |
1155 | if ((sscanf(optarg, "%d%1s", &gs.loglevel, garbage) | |
1156 | != 1) | |
1157 | || (gs.loglevel < LOG_EMERG)) { | |
1158 | fprintf(stderr, | |
1159 | "Invalid loglevel argument: %s\n", | |
1160 | optarg); | |
1161 | frr_help_exit(1); | |
1162 | } | |
1163 | } break; | |
1164 | case OPTION_MINRESTART: { | |
1165 | char garbage[3]; | |
1166 | if ((sscanf(optarg, "%ld%1s", &gs.min_restart_interval, | |
1167 | garbage) | |
1168 | != 1) | |
1169 | || (gs.min_restart_interval < 0)) { | |
1170 | fprintf(stderr, | |
1171 | "Invalid min_restart_interval argument: %s\n", | |
1172 | optarg); | |
1173 | frr_help_exit(1); | |
1174 | } | |
1175 | } break; | |
1176 | case OPTION_MAXRESTART: { | |
1177 | char garbage[3]; | |
1178 | if ((sscanf(optarg, "%ld%1s", &gs.max_restart_interval, | |
1179 | garbage) | |
1180 | != 1) | |
1181 | || (gs.max_restart_interval < 0)) { | |
1182 | fprintf(stderr, | |
1183 | "Invalid max_restart_interval argument: %s\n", | |
1184 | optarg); | |
1185 | frr_help_exit(1); | |
1186 | } | |
1187 | } break; | |
1188 | case 'i': { | |
1189 | char garbage[3]; | |
1190 | int period; | |
1191 | if ((sscanf(optarg, "%d%1s", &period, garbage) != 1) | |
1192 | || (gs.period < 1)) { | |
1193 | fprintf(stderr, | |
1194 | "Invalid interval argument: %s\n", | |
1195 | optarg); | |
1196 | frr_help_exit(1); | |
1197 | } | |
1198 | gs.period = 1000 * period; | |
1199 | } break; | |
1200 | case 'p': | |
1201 | watchfrr_di.pid_file = optarg; | |
1202 | break; | |
1203 | case 'r': | |
1204 | if (!valid_command(optarg)) { | |
1205 | fprintf(stderr, | |
1206 | "Invalid restart command, must contain '%%s': %s\n", | |
1207 | optarg); | |
1208 | frr_help_exit(1); | |
1209 | } | |
1210 | gs.restart_command = optarg; | |
1211 | break; | |
1212 | case 's': | |
1213 | if (!valid_command(optarg)) { | |
1214 | fprintf(stderr, | |
1215 | "Invalid start command, must contain '%%s': %s\n", | |
1216 | optarg); | |
1217 | frr_help_exit(1); | |
1218 | } | |
1219 | gs.start_command = optarg; | |
1220 | break; | |
1221 | case 'S': | |
1222 | gs.vtydir = optarg; | |
1223 | break; | |
1224 | case 't': { | |
1225 | char garbage[3]; | |
1226 | if ((sscanf(optarg, "%ld%1s", &gs.timeout, garbage) | |
1227 | != 1) | |
1228 | || (gs.timeout < 1)) { | |
1229 | fprintf(stderr, | |
1230 | "Invalid timeout argument: %s\n", | |
1231 | optarg); | |
1232 | frr_help_exit(1); | |
1233 | } | |
1234 | } break; | |
1235 | case 'T': { | |
1236 | char garbage[3]; | |
1237 | if ((sscanf(optarg, "%ld%1s", &gs.restart_timeout, | |
1238 | garbage) | |
1239 | != 1) | |
1240 | || (gs.restart_timeout < 1)) { | |
1241 | fprintf(stderr, | |
1242 | "Invalid restart timeout argument: %s\n", | |
1243 | optarg); | |
1244 | frr_help_exit(1); | |
1245 | } | |
1246 | } break; | |
1247 | default: | |
1248 | fputs("Invalid option.\n", stderr); | |
1249 | frr_help_exit(1); | |
1250 | } | |
1251 | } | |
1252 | ||
1253 | if (watch_only | |
1254 | && (gs.start_command || gs.stop_command || gs.restart_command)) { | |
1255 | fputs("Options -r/-s/-k are not used when --dry is active.\n", | |
1256 | stderr); | |
1257 | } | |
1258 | if (!watch_only | |
1259 | && (!gs.restart_command || !gs.start_command || !gs.stop_command)) { | |
1260 | fprintf(stderr, | |
1261 | "Options -s (start), -k (kill), and -r (restart) are required.\n"); | |
1262 | frr_help_exit(1); | |
1263 | } | |
1264 | ||
1265 | if (blankstr) { | |
1266 | if (gs.restart_command) | |
1267 | gs.restart_command = | |
1268 | translate_blanks(gs.restart_command, blankstr); | |
1269 | if (gs.start_command) | |
1270 | gs.start_command = | |
1271 | translate_blanks(gs.start_command, blankstr); | |
1272 | if (gs.stop_command) | |
1273 | gs.stop_command = | |
1274 | translate_blanks(gs.stop_command, blankstr); | |
1275 | } | |
1276 | ||
1277 | gs.restart.interval = gs.min_restart_interval; | |
1278 | ||
1279 | master = frr_init(); | |
1280 | watchfrr_error_init(); | |
1281 | watchfrr_init(argc, argv); | |
1282 | watchfrr_vty_init(); | |
1283 | ||
1284 | frr_config_fork(); | |
1285 | ||
1286 | zlog_set_level(ZLOG_DEST_MONITOR, ZLOG_DISABLED); | |
1287 | if (watchfrr_di.daemon_mode) | |
1288 | zlog_set_level(ZLOG_DEST_SYSLOG, MIN(gs.loglevel, LOG_DEBUG)); | |
1289 | else | |
1290 | zlog_set_level(ZLOG_DEST_STDOUT, MIN(gs.loglevel, LOG_DEBUG)); | |
1291 | ||
1292 | frr_run(master); | |
1293 | ||
1294 | systemd_send_stopping(); | |
1295 | /* Not reached. */ | |
1296 | return 0; | |
1297 | } |