blob: e0e31508a486175e6bf1f7dc0461c995cfa9da3c
1 | /* |
2 | Copyright (c) 2001-2006, Gerrit Pape |
3 | All rights reserved. |
4 | |
5 | Redistribution and use in source and binary forms, with or without |
6 | modification, are permitted provided that the following conditions are met: |
7 | |
8 | 1. Redistributions of source code must retain the above copyright notice, |
9 | this list of conditions and the following disclaimer. |
10 | 2. Redistributions in binary form must reproduce the above copyright |
11 | notice, this list of conditions and the following disclaimer in the |
12 | documentation and/or other materials provided with the distribution. |
13 | 3. The name of the author may not be used to endorse or promote products |
14 | derived from this software without specific prior written permission. |
15 | |
16 | THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
17 | WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
18 | MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
19 | EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
20 | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
21 | PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
22 | OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
23 | WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
24 | OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
25 | ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | */ |
27 | |
28 | /* Busyboxed by Denys Vlasenko <vda.linux@googlemail.com> */ |
29 | |
30 | //config:config RUNSV |
31 | //config: bool "runsv" |
32 | //config: default y |
33 | //config: help |
34 | //config: runsv starts and monitors a service and optionally an appendant log |
35 | //config: service. |
36 | |
37 | //applet:IF_RUNSV(APPLET(runsv, BB_DIR_USR_BIN, BB_SUID_DROP)) |
38 | |
39 | //kbuild:lib-$(CONFIG_RUNSV) += runsv.o |
40 | |
41 | //usage:#define runsv_trivial_usage |
42 | //usage: "DIR" |
43 | //usage:#define runsv_full_usage "\n\n" |
44 | //usage: "Start and monitor a service and optionally an appendant log service" |
45 | |
46 | #include <sys/file.h> |
47 | #include "libbb.h" |
48 | #include "common_bufsiz.h" |
49 | #include "runit_lib.h" |
50 | |
51 | #if ENABLE_MONOTONIC_SYSCALL |
52 | #include <sys/syscall.h> |
53 | |
54 | /* libc has incredibly messy way of doing this, |
55 | * typically requiring -lrt. We just skip all this mess */ |
56 | static void gettimeofday_ns(struct timespec *ts) |
57 | { |
58 | syscall(__NR_clock_gettime, CLOCK_REALTIME, ts); |
59 | } |
60 | #else |
61 | static void gettimeofday_ns(struct timespec *ts) |
62 | { |
63 | BUILD_BUG_ON(sizeof(struct timeval) != sizeof(struct timespec)); |
64 | BUILD_BUG_ON(sizeof(((struct timeval*)ts)->tv_usec) != sizeof(ts->tv_nsec)); |
65 | /* Cheat */ |
66 | gettimeofday((void*)ts, NULL); |
67 | ts->tv_nsec *= 1000; |
68 | } |
69 | #endif |
70 | |
71 | /* Compare possibly overflowing unsigned counters */ |
72 | #define LESS(a,b) ((int)((unsigned)(b) - (unsigned)(a)) > 0) |
73 | |
74 | /* state */ |
75 | #define S_DOWN 0 |
76 | #define S_RUN 1 |
77 | #define S_FINISH 2 |
78 | /* ctrl */ |
79 | #define C_NOOP 0 |
80 | #define C_TERM 1 |
81 | #define C_PAUSE 2 |
82 | /* want */ |
83 | #define W_UP 0 |
84 | #define W_DOWN 1 |
85 | #define W_EXIT 2 |
86 | |
87 | struct svdir { |
88 | int pid; |
89 | smallint state; |
90 | smallint ctrl; |
91 | smallint sd_want; |
92 | smallint islog; |
93 | struct timespec start; |
94 | int fdlock; |
95 | int fdcontrol; |
96 | int fdcontrolwrite; |
97 | int wstat; |
98 | }; |
99 | |
100 | struct globals { |
101 | smallint haslog; |
102 | smallint sigterm; |
103 | smallint pidchanged; |
104 | struct fd_pair selfpipe; |
105 | struct fd_pair logpipe; |
106 | char *dir; |
107 | struct svdir svd[2]; |
108 | } FIX_ALIASING; |
109 | #define G (*(struct globals*)bb_common_bufsiz1) |
110 | #define haslog (G.haslog ) |
111 | #define sigterm (G.sigterm ) |
112 | #define pidchanged (G.pidchanged ) |
113 | #define selfpipe (G.selfpipe ) |
114 | #define logpipe (G.logpipe ) |
115 | #define dir (G.dir ) |
116 | #define svd (G.svd ) |
117 | #define INIT_G() do { \ |
118 | setup_common_bufsiz(); \ |
119 | pidchanged = 1; \ |
120 | } while (0) |
121 | |
122 | static void fatal2_cannot(const char *m1, const char *m2) |
123 | { |
124 | bb_perror_msg_and_die("%s: fatal: can't %s%s", dir, m1, m2); |
125 | /* was exiting 111 */ |
126 | } |
127 | static void fatal_cannot(const char *m) |
128 | { |
129 | fatal2_cannot(m, ""); |
130 | /* was exiting 111 */ |
131 | } |
132 | static void fatal2x_cannot(const char *m1, const char *m2) |
133 | { |
134 | bb_error_msg_and_die("%s: fatal: can't %s%s", dir, m1, m2); |
135 | /* was exiting 111 */ |
136 | } |
137 | static void warn_cannot(const char *m) |
138 | { |
139 | bb_perror_msg("%s: warning: cannot %s", dir, m); |
140 | } |
141 | |
142 | static void s_child(int sig_no UNUSED_PARAM) |
143 | { |
144 | write(selfpipe.wr, "", 1); |
145 | } |
146 | |
147 | static void s_term(int sig_no UNUSED_PARAM) |
148 | { |
149 | sigterm = 1; |
150 | write(selfpipe.wr, "", 1); /* XXX */ |
151 | } |
152 | |
153 | static int open_trunc_or_warn(const char *name) |
154 | { |
155 | /* Why O_NDELAY? */ |
156 | int fd = open(name, O_WRONLY | O_NDELAY | O_TRUNC | O_CREAT, 0644); |
157 | if (fd < 0) |
158 | bb_perror_msg("%s: warning: cannot open %s", |
159 | dir, name); |
160 | return fd; |
161 | } |
162 | |
163 | static void update_status(struct svdir *s) |
164 | { |
165 | ssize_t sz; |
166 | int fd; |
167 | svstatus_t status; |
168 | |
169 | /* pid */ |
170 | if (pidchanged) { |
171 | fd = open_trunc_or_warn("supervise/pid.new"); |
172 | if (fd < 0) |
173 | return; |
174 | if (s->pid) { |
175 | char spid[sizeof(int)*3 + 2]; |
176 | int size = sprintf(spid, "%u\n", (unsigned)s->pid); |
177 | write(fd, spid, size); |
178 | } |
179 | close(fd); |
180 | if (rename_or_warn("supervise/pid.new", |
181 | s->islog ? "log/supervise/pid" : "log/supervise/pid"+4)) |
182 | return; |
183 | pidchanged = 0; |
184 | } |
185 | |
186 | /* stat */ |
187 | fd = open_trunc_or_warn("supervise/stat.new"); |
188 | if (fd < -1) |
189 | return; |
190 | |
191 | { |
192 | char stat_buf[sizeof("finish, paused, got TERM, want down\n")]; |
193 | char *p = stat_buf; |
194 | switch (s->state) { |
195 | case S_DOWN: |
196 | p = stpcpy(p, "down"); |
197 | break; |
198 | case S_RUN: |
199 | p = stpcpy(p, "run"); |
200 | break; |
201 | case S_FINISH: |
202 | p = stpcpy(p, "finish"); |
203 | break; |
204 | } |
205 | if (s->ctrl & C_PAUSE) |
206 | p = stpcpy(p, ", paused"); |
207 | if (s->ctrl & C_TERM) |
208 | p = stpcpy(p, ", got TERM"); |
209 | if (s->state != S_DOWN) |
210 | switch (s->sd_want) { |
211 | case W_DOWN: |
212 | p = stpcpy(p, ", want down"); |
213 | break; |
214 | case W_EXIT: |
215 | p = stpcpy(p, ", want exit"); |
216 | break; |
217 | } |
218 | *p++ = '\n'; |
219 | write(fd, stat_buf, p - stat_buf); |
220 | close(fd); |
221 | } |
222 | |
223 | rename_or_warn("supervise/stat.new", |
224 | s->islog ? "log/supervise/stat" : "log/supervise/stat"+4); |
225 | |
226 | /* supervise compatibility */ |
227 | memset(&status, 0, sizeof(status)); |
228 | status.time_be64 = SWAP_BE64(s->start.tv_sec + 0x400000000000000aULL); |
229 | status.time_nsec_be32 = SWAP_BE32(s->start.tv_nsec); |
230 | status.pid_le32 = SWAP_LE32(s->pid); |
231 | if (s->ctrl & C_PAUSE) |
232 | status.paused = 1; |
233 | if (s->sd_want == W_UP) |
234 | status.want = 'u'; |
235 | else |
236 | status.want = 'd'; |
237 | if (s->ctrl & C_TERM) |
238 | status.got_term = 1; |
239 | status.run_or_finish = s->state; |
240 | fd = open_trunc_or_warn("supervise/status.new"); |
241 | if (fd < 0) |
242 | return; |
243 | sz = write(fd, &status, sizeof(status)); |
244 | close(fd); |
245 | if (sz != sizeof(status)) { |
246 | warn_cannot("write supervise/status.new"); |
247 | unlink("supervise/status.new"); |
248 | return; |
249 | } |
250 | rename_or_warn("supervise/status.new", |
251 | s->islog ? "log/supervise/status" : "log/supervise/status"+4); |
252 | } |
253 | |
254 | static unsigned custom(struct svdir *s, char c) |
255 | { |
256 | pid_t pid; |
257 | int w; |
258 | char a[10]; |
259 | struct stat st; |
260 | |
261 | if (s->islog) |
262 | return 0; |
263 | strcpy(a, "control/?"); |
264 | a[8] = c; /* replace '?' */ |
265 | if (stat(a, &st) == 0) { |
266 | if (st.st_mode & S_IXUSR) { |
267 | pid = vfork(); |
268 | if (pid == -1) { |
269 | warn_cannot("vfork for control/?"); |
270 | return 0; |
271 | } |
272 | if (pid == 0) { |
273 | /* child */ |
274 | if (haslog && dup2(logpipe.wr, 1) == -1) |
275 | warn_cannot("setup stdout for control/?"); |
276 | execl(a, a, (char *) NULL); |
277 | fatal_cannot("run control/?"); |
278 | } |
279 | /* parent */ |
280 | if (safe_waitpid(pid, &w, 0) == -1) { |
281 | warn_cannot("wait for child control/?"); |
282 | return 0; |
283 | } |
284 | return WEXITSTATUS(w) == 0; |
285 | } |
286 | } else { |
287 | if (errno != ENOENT) |
288 | warn_cannot("stat control/?"); |
289 | } |
290 | return 0; |
291 | } |
292 | |
293 | static void stopservice(struct svdir *s) |
294 | { |
295 | if (s->pid && !custom(s, 't')) { |
296 | kill(s->pid, SIGTERM); |
297 | s->ctrl |= C_TERM; |
298 | update_status(s); |
299 | } |
300 | if (s->sd_want == W_DOWN) { |
301 | kill(s->pid, SIGCONT); |
302 | custom(s, 'd'); |
303 | return; |
304 | } |
305 | if (s->sd_want == W_EXIT) { |
306 | kill(s->pid, SIGCONT); |
307 | custom(s, 'x'); |
308 | } |
309 | } |
310 | |
311 | static void startservice(struct svdir *s) |
312 | { |
313 | int p; |
314 | const char *arg[4]; |
315 | char exitcode[sizeof(int)*3 + 2]; |
316 | |
317 | if (s->state == S_FINISH) { |
318 | /* Two arguments are given to ./finish. The first one is ./run exit code, |
319 | * or -1 if ./run didnt exit normally. The second one is |
320 | * the least significant byte of the exit status as determined by waitpid; |
321 | * for instance it is 0 if ./run exited normally, and the signal number |
322 | * if ./run was terminated by a signal. If runsv cannot start ./run |
323 | * for some reason, the exit code is 111 and the status is 0. |
324 | */ |
325 | arg[0] = "./finish"; |
326 | arg[1] = "-1"; |
327 | if (WIFEXITED(s->wstat)) { |
328 | *utoa_to_buf(WEXITSTATUS(s->wstat), exitcode, sizeof(exitcode)) = '\0'; |
329 | arg[1] = exitcode; |
330 | } |
331 | //arg[2] = "0"; |
332 | //if (WIFSIGNALED(s->wstat)) { |
333 | arg[2] = utoa(WTERMSIG(s->wstat)); |
334 | //} |
335 | arg[3] = NULL; |
336 | } else { |
337 | arg[0] = "./run"; |
338 | arg[1] = NULL; |
339 | custom(s, 'u'); |
340 | } |
341 | |
342 | if (s->pid != 0) |
343 | stopservice(s); /* should never happen */ |
344 | while ((p = vfork()) == -1) { |
345 | warn_cannot("vfork, sleeping"); |
346 | sleep(5); |
347 | } |
348 | if (p == 0) { |
349 | /* child */ |
350 | if (haslog) { |
351 | /* NB: bug alert! right order is close, then dup2 */ |
352 | if (s->islog) { |
353 | xchdir("./log"); |
354 | close(logpipe.wr); |
355 | xdup2(logpipe.rd, 0); |
356 | } else { |
357 | close(logpipe.rd); |
358 | xdup2(logpipe.wr, 1); |
359 | } |
360 | } |
361 | /* Non-ignored signals revert to SIG_DFL on exec anyway */ |
362 | /*bb_signals(0 |
363 | + (1 << SIGCHLD) |
364 | + (1 << SIGTERM) |
365 | , SIG_DFL);*/ |
366 | sig_unblock(SIGCHLD); |
367 | sig_unblock(SIGTERM); |
368 | execv(arg[0], (char**) arg); |
369 | fatal2_cannot(s->islog ? "start log/" : "start ", arg[0]); |
370 | } |
371 | /* parent */ |
372 | if (s->state != S_FINISH) { |
373 | gettimeofday_ns(&s->start); |
374 | s->state = S_RUN; |
375 | } |
376 | s->pid = p; |
377 | pidchanged = 1; |
378 | s->ctrl = C_NOOP; |
379 | update_status(s); |
380 | } |
381 | |
382 | static int ctrl(struct svdir *s, char c) |
383 | { |
384 | int sig; |
385 | |
386 | switch (c) { |
387 | case 'd': /* down */ |
388 | s->sd_want = W_DOWN; |
389 | update_status(s); |
390 | if (s->pid && s->state != S_FINISH) |
391 | stopservice(s); |
392 | break; |
393 | case 'u': /* up */ |
394 | s->sd_want = W_UP; |
395 | update_status(s); |
396 | if (s->pid == 0) |
397 | startservice(s); |
398 | break; |
399 | case 'x': /* exit */ |
400 | if (s->islog) |
401 | break; |
402 | s->sd_want = W_EXIT; |
403 | update_status(s); |
404 | /* FALLTHROUGH */ |
405 | case 't': /* sig term */ |
406 | if (s->pid && s->state != S_FINISH) |
407 | stopservice(s); |
408 | break; |
409 | case 'k': /* sig kill */ |
410 | if (s->pid && !custom(s, c)) |
411 | kill(s->pid, SIGKILL); |
412 | s->state = S_DOWN; |
413 | break; |
414 | case 'p': /* sig pause */ |
415 | if (s->pid && !custom(s, c)) |
416 | kill(s->pid, SIGSTOP); |
417 | s->ctrl |= C_PAUSE; |
418 | update_status(s); |
419 | break; |
420 | case 'c': /* sig cont */ |
421 | if (s->pid && !custom(s, c)) |
422 | kill(s->pid, SIGCONT); |
423 | s->ctrl &= ~C_PAUSE; |
424 | update_status(s); |
425 | break; |
426 | case 'o': /* once */ |
427 | s->sd_want = W_DOWN; |
428 | update_status(s); |
429 | if (!s->pid) |
430 | startservice(s); |
431 | break; |
432 | case 'a': /* sig alarm */ |
433 | sig = SIGALRM; |
434 | goto sendsig; |
435 | case 'h': /* sig hup */ |
436 | sig = SIGHUP; |
437 | goto sendsig; |
438 | case 'i': /* sig int */ |
439 | sig = SIGINT; |
440 | goto sendsig; |
441 | case 'q': /* sig quit */ |
442 | sig = SIGQUIT; |
443 | goto sendsig; |
444 | case '1': /* sig usr1 */ |
445 | sig = SIGUSR1; |
446 | goto sendsig; |
447 | case '2': /* sig usr2 */ |
448 | sig = SIGUSR2; |
449 | goto sendsig; |
450 | } |
451 | return 1; |
452 | sendsig: |
453 | if (s->pid && !custom(s, c)) |
454 | kill(s->pid, sig); |
455 | return 1; |
456 | } |
457 | |
458 | int runsv_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
459 | int runsv_main(int argc UNUSED_PARAM, char **argv) |
460 | { |
461 | struct stat s; |
462 | int fd; |
463 | int r; |
464 | char buf[256]; |
465 | |
466 | INIT_G(); |
467 | |
468 | dir = single_argv(argv); |
469 | |
470 | xpiped_pair(selfpipe); |
471 | close_on_exec_on(selfpipe.rd); |
472 | close_on_exec_on(selfpipe.wr); |
473 | ndelay_on(selfpipe.rd); |
474 | ndelay_on(selfpipe.wr); |
475 | |
476 | sig_block(SIGCHLD); |
477 | bb_signals_recursive_norestart(1 << SIGCHLD, s_child); |
478 | sig_block(SIGTERM); |
479 | bb_signals_recursive_norestart(1 << SIGTERM, s_term); |
480 | |
481 | xchdir(dir); |
482 | /* bss: svd[0].pid = 0; */ |
483 | if (S_DOWN) svd[0].state = S_DOWN; /* otherwise already 0 (bss) */ |
484 | if (C_NOOP) svd[0].ctrl = C_NOOP; |
485 | if (W_UP) svd[0].sd_want = W_UP; |
486 | /* bss: svd[0].islog = 0; */ |
487 | /* bss: svd[1].pid = 0; */ |
488 | gettimeofday_ns(&svd[0].start); |
489 | if (stat("down", &s) != -1) |
490 | svd[0].sd_want = W_DOWN; |
491 | |
492 | if (stat("log", &s) == -1) { |
493 | if (errno != ENOENT) |
494 | warn_cannot("stat ./log"); |
495 | } else { |
496 | if (!S_ISDIR(s.st_mode)) { |
497 | errno = 0; |
498 | warn_cannot("stat log/down: log is not a directory"); |
499 | } else { |
500 | haslog = 1; |
501 | svd[1].state = S_DOWN; |
502 | svd[1].ctrl = C_NOOP; |
503 | svd[1].sd_want = W_UP; |
504 | svd[1].islog = 1; |
505 | gettimeofday_ns(&svd[1].start); |
506 | if (stat("log/down", &s) != -1) |
507 | svd[1].sd_want = W_DOWN; |
508 | xpiped_pair(logpipe); |
509 | close_on_exec_on(logpipe.rd); |
510 | close_on_exec_on(logpipe.wr); |
511 | } |
512 | } |
513 | |
514 | if (mkdir("supervise", 0700) == -1) { |
515 | r = readlink("supervise", buf, sizeof(buf)); |
516 | if (r != -1) { |
517 | if (r == sizeof(buf)) |
518 | fatal2x_cannot("readlink ./supervise", ": name too long"); |
519 | buf[r] = 0; |
520 | mkdir(buf, 0700); |
521 | } else { |
522 | if ((errno != ENOENT) && (errno != EINVAL)) |
523 | fatal_cannot("readlink ./supervise"); |
524 | } |
525 | } |
526 | svd[0].fdlock = xopen3("log/supervise/lock"+4, |
527 | O_WRONLY|O_NDELAY|O_APPEND|O_CREAT, 0600); |
528 | if (flock(svd[0].fdlock, LOCK_EX | LOCK_NB) == -1) |
529 | fatal_cannot("lock supervise/lock"); |
530 | close_on_exec_on(svd[0].fdlock); |
531 | if (haslog) { |
532 | if (mkdir("log/supervise", 0700) == -1) { |
533 | r = readlink("log/supervise", buf, 256); |
534 | if (r != -1) { |
535 | if (r == 256) |
536 | fatal2x_cannot("readlink ./log/supervise", ": name too long"); |
537 | buf[r] = 0; |
538 | fd = xopen(".", O_RDONLY|O_NDELAY); |
539 | xchdir("./log"); |
540 | mkdir(buf, 0700); |
541 | if (fchdir(fd) == -1) |
542 | fatal_cannot("change back to service directory"); |
543 | close(fd); |
544 | } |
545 | else { |
546 | if ((errno != ENOENT) && (errno != EINVAL)) |
547 | fatal_cannot("readlink ./log/supervise"); |
548 | } |
549 | } |
550 | svd[1].fdlock = xopen3("log/supervise/lock", |
551 | O_WRONLY|O_NDELAY|O_APPEND|O_CREAT, 0600); |
552 | if (flock(svd[1].fdlock, LOCK_EX) == -1) |
553 | fatal_cannot("lock log/supervise/lock"); |
554 | close_on_exec_on(svd[1].fdlock); |
555 | } |
556 | |
557 | mkfifo("log/supervise/control"+4, 0600); |
558 | svd[0].fdcontrol = xopen("log/supervise/control"+4, O_RDONLY|O_NDELAY); |
559 | close_on_exec_on(svd[0].fdcontrol); |
560 | svd[0].fdcontrolwrite = xopen("log/supervise/control"+4, O_WRONLY|O_NDELAY); |
561 | close_on_exec_on(svd[0].fdcontrolwrite); |
562 | update_status(&svd[0]); |
563 | if (haslog) { |
564 | mkfifo("log/supervise/control", 0600); |
565 | svd[1].fdcontrol = xopen("log/supervise/control", O_RDONLY|O_NDELAY); |
566 | close_on_exec_on(svd[1].fdcontrol); |
567 | svd[1].fdcontrolwrite = xopen("log/supervise/control", O_WRONLY|O_NDELAY); |
568 | close_on_exec_on(svd[1].fdcontrolwrite); |
569 | update_status(&svd[1]); |
570 | } |
571 | mkfifo("log/supervise/ok"+4, 0600); |
572 | fd = xopen("log/supervise/ok"+4, O_RDONLY|O_NDELAY); |
573 | close_on_exec_on(fd); |
574 | if (haslog) { |
575 | mkfifo("log/supervise/ok", 0600); |
576 | fd = xopen("log/supervise/ok", O_RDONLY|O_NDELAY); |
577 | close_on_exec_on(fd); |
578 | } |
579 | for (;;) { |
580 | struct pollfd x[3]; |
581 | unsigned deadline; |
582 | char ch; |
583 | |
584 | if (haslog) |
585 | if (!svd[1].pid && svd[1].sd_want == W_UP) |
586 | startservice(&svd[1]); |
587 | if (!svd[0].pid) |
588 | if (svd[0].sd_want == W_UP || svd[0].state == S_FINISH) |
589 | startservice(&svd[0]); |
590 | |
591 | x[0].fd = selfpipe.rd; |
592 | x[0].events = POLLIN; |
593 | x[1].fd = svd[0].fdcontrol; |
594 | x[1].events = POLLIN; |
595 | /* x[2] is used only if haslog == 1 */ |
596 | x[2].fd = svd[1].fdcontrol; |
597 | x[2].events = POLLIN; |
598 | sig_unblock(SIGTERM); |
599 | sig_unblock(SIGCHLD); |
600 | poll(x, 2 + haslog, 3600*1000); |
601 | sig_block(SIGTERM); |
602 | sig_block(SIGCHLD); |
603 | |
604 | while (read(selfpipe.rd, &ch, 1) == 1) |
605 | continue; |
606 | |
607 | for (;;) { |
608 | pid_t child; |
609 | int wstat; |
610 | |
611 | child = wait_any_nohang(&wstat); |
612 | if (!child) |
613 | break; |
614 | if ((child == -1) && (errno != EINTR)) |
615 | break; |
616 | if (child == svd[0].pid) { |
617 | svd[0].wstat = wstat; |
618 | svd[0].pid = 0; |
619 | pidchanged = 1; |
620 | svd[0].ctrl &= ~C_TERM; |
621 | if (svd[0].state != S_FINISH) { |
622 | fd = open("finish", O_RDONLY|O_NDELAY); |
623 | if (fd != -1) { |
624 | close(fd); |
625 | svd[0].state = S_FINISH; |
626 | update_status(&svd[0]); |
627 | continue; |
628 | } |
629 | } |
630 | svd[0].state = S_DOWN; |
631 | deadline = svd[0].start.tv_sec + 1; |
632 | gettimeofday_ns(&svd[0].start); |
633 | update_status(&svd[0]); |
634 | if (LESS(svd[0].start.tv_sec, deadline)) |
635 | sleep(1); |
636 | } |
637 | if (haslog) { |
638 | if (child == svd[1].pid) { |
639 | svd[0].wstat = wstat; |
640 | svd[1].pid = 0; |
641 | pidchanged = 1; |
642 | svd[1].state = S_DOWN; |
643 | svd[1].ctrl &= ~C_TERM; |
644 | deadline = svd[1].start.tv_sec + 1; |
645 | gettimeofday_ns(&svd[1].start); |
646 | update_status(&svd[1]); |
647 | if (LESS(svd[1].start.tv_sec, deadline)) |
648 | sleep(1); |
649 | } |
650 | } |
651 | } /* for (;;) */ |
652 | if (read(svd[0].fdcontrol, &ch, 1) == 1) |
653 | ctrl(&svd[0], ch); |
654 | if (haslog) |
655 | if (read(svd[1].fdcontrol, &ch, 1) == 1) |
656 | ctrl(&svd[1], ch); |
657 | |
658 | if (sigterm) { |
659 | ctrl(&svd[0], 'x'); |
660 | sigterm = 0; |
661 | } |
662 | |
663 | if (svd[0].sd_want == W_EXIT && svd[0].state == S_DOWN) { |
664 | if (svd[1].pid == 0) |
665 | _exit(EXIT_SUCCESS); |
666 | if (svd[1].sd_want != W_EXIT) { |
667 | svd[1].sd_want = W_EXIT; |
668 | /* stopservice(&svd[1]); */ |
669 | update_status(&svd[1]); |
670 | close(logpipe.wr); |
671 | close(logpipe.rd); |
672 | } |
673 | } |
674 | } /* for (;;) */ |
675 | /* not reached */ |
676 | return 0; |
677 | } |
678 |