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service: verify PID is valid when reading it from PID file

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This commit is contained in:
Lennart Poettering 2010-04-08 03:48:52 +02:00
parent 70123e68a0
commit b8c597d5d2
1 changed files with 7 additions and 1 deletions
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8
service.c
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@ -839,7 +839,13 @@ static int service_load_pid_file(Service *s) {
if ((unsigned long) (pid_t) p != p)
return -ERANGE;
s->main_pid = p;
if (kill((pid_t) p, 0) < 0 && errno != EPERM) {
log_warning("PID %llu read from file %s does not exist. Your service or init script might be broken.",
(unsigned long long) p, s->pid_file);
return -ESRCH;
}
s->main_pid = (pid_t) p;
s->main_pid_known = true;
return 0;