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