From: Jonathan McDowell <noodles@earth.li>
Date: Wed, 16 Mar 2011 03:33:26 +0000 (+0000)
Subject: Make keyd background itself by default
X-Git-Url: https://git.sommitrealweird.co.uk/onak.git/commitdiff_plain/8d14d66b84cc370cefe54b33de1b95bb49c90bf6

Make keyd background itself by default

  It's meant to be a daemon, so it should run in the background. The
  -f option will cause it to run in the foreground for debugging etc.
---

diff --git a/keyd.c b/keyd.c
index 05f9fe9..18d09bf 100644
--- a/keyd.c
+++ b/keyd.c
@@ -6,6 +6,7 @@
  * Copyright 2004 Project Purple
  */
 
+#include <errno.h>
 #include <fcntl.h>
 #include <getopt.h>
 #include <stdio.h>
@@ -28,6 +29,32 @@
 #include "onak-conf.h"
 #include "parsekey.h"
 
+void daemonize(void)
+{
+	pid_t pid;
+
+	pid = fork();
+
+	if (pid < 0) {
+		logthing(LOGTHING_CRITICAL,
+			"Failed to fork into background: %d (%s)",
+			errno,
+			strerror(errno));
+		exit(EXIT_FAILURE);
+	} else if (pid > 0) {
+		logthing(LOGTHING_INFO, "Backgrounded as pid %d.", pid);
+		exit(EXIT_SUCCESS);
+	}
+
+	pid = setsid();
+
+	freopen("/dev/null", "r", stdin);
+	freopen("/dev/null", "w", stdout);
+	freopen("/dev/null", "w", stderr);
+
+	return;
+}
+
 void iteratefunc(void *ctx, struct openpgp_publickey *key)
 {
 	struct openpgp_packet_list *packets = NULL;
@@ -343,13 +370,17 @@ int main(int argc, char *argv[])
 	fd_set rfds;
 	char sockname[1024];
 	char *configfile = NULL;
+	bool foreground = false;
 	int optchar;
 
-	while ((optchar = getopt(argc, argv, "c:")) != -1 ) {
+	while ((optchar = getopt(argc, argv, "c:f")) != -1 ) {
 		switch (optchar) {
 		case 'c':
 			configfile = strdup(optarg);
 			break;
+		case 'f':
+			foreground = true;
+			break;
 		}
 	}
 
@@ -358,6 +389,10 @@ int main(int argc, char *argv[])
 	configfile = NULL;
 	initlogthing("keyd", config.logfile);
 
+	if (!foreground) {
+		daemonize();
+	}
+
 	catchsignals();
 	
 	snprintf(sockname, 1023, "%s/%s", config.db_dir, KEYD_SOCKET);