server: write pid file for backgrounded server to specified file
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/server.c b/server.c
index cf3a48e..2de65ad 100644
--- a/server.c
+++ b/server.c
@@ -924,22 +924,42 @@
sigaction(SIGTERM, &act, NULL);
}
-int fio_start_server(int daemonize)
+static void write_pid(pid_t pid, const char *pidfile)
+{
+ FILE *fpid;
+
+ fpid = fopen(pidfile, "w");
+ if (!fpid) {
+ log_err("fio: failed opening pid file %s\n", pidfile);
+ return;
+ }
+
+ fprintf(fpid, "%u\n", (unsigned int) pid);
+}
+
+/*
+ * If pidfile is specified, background us.
+ */
+int fio_start_server(char *pidfile)
{
pid_t pid;
+ int ret;
server_signal_handler();
- if (!daemonize)
+ if (!pidfile)
return fio_server();
openlog("fio", LOG_NDELAY|LOG_NOWAIT|LOG_PID, LOG_USER);
pid = fork();
if (pid < 0) {
syslog(LOG_ERR, "failed server fork");
+ free(pidfile);
return -1;
- } else if (pid)
+ } else if (pid) {
+ write_pid(pid, pidfile);
exit(0);
+ }
setsid();
close(STDIN_FILENO);
@@ -948,7 +968,13 @@
f_out = NULL;
f_err = NULL;
log_syslog = 1;
- return fio_server();
+
+ ret = fio_server();
+
+ closelog();
+ unlink(pidfile);
+ free(pidfile);
+ return ret;
}
void fio_server_set_arg(const char *arg)