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Added pidfile locking.

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default 2024-12-16 19:47:27 +01:00
parent 1aab3c5739
commit b9e0c6e742
1 changed files with 20 additions and 11 deletions
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31
httpd.c
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@ -778,6 +778,26 @@ void httpd(void)
xs *shm_name = NULL; xs *shm_name = NULL;
sem_t anon_job_sem; sem_t anon_job_sem;
xs *pidfile = xs_fmt("%s/server.pid", srv_basedir); xs *pidfile = xs_fmt("%s/server.pid", srv_basedir);
int pidfd;
{
/* do some pidfile locking acrobatics */
if ((pidfd = open(pidfile, O_RDWR | O_CREAT, 0660)) == -1) {
srv_log(xs_fmt("Cannot create pidfile %s -- cannot continue", pidfile));
return;
}
if (lockf(pidfd, F_TLOCK, 1) == -1) {
srv_log(xs_fmt("Cannot lock pidfile %s -- server already running?", pidfile));
close(pidfd);
return;
}
ftruncate(pidfd, 0);
xs *s = xs_fmt("%d\n", (int)getpid());
write(pidfd, s, strlen(s));
}
address = xs_dict_get(srv_config, "address"); address = xs_dict_get(srv_config, "address");
@ -813,17 +833,6 @@ void httpd(void)
srv_log(xs_fmt("httpd%s start %s %s", p_state->use_fcgi ? " (FastCGI)" : "", srv_log(xs_fmt("httpd%s start %s %s", p_state->use_fcgi ? " (FastCGI)" : "",
full_address, USER_AGENT)); full_address, USER_AGENT));
{
FILE *f;
if ((f = fopen(pidfile, "w")) != NULL) {
fprintf(f, "%d\n", getpid());
fclose(f);
}
else
srv_log(xs_fmt("Cannot create %s: %s", pidfile, strerror(errno)));
}
/* show the number of usable file descriptors */ /* show the number of usable file descriptors */
struct rlimit r; struct rlimit r;
getrlimit(RLIMIT_NOFILE, &r); getrlimit(RLIMIT_NOFILE, &r);