Make keyd background itself by default

[onak.git] / keyd.c

diff --git a/keyd.c b/keyd.c
index 7b8a18fa5f6f12f74f388037731df34f24dcb5ea..18d09bf515fd5533c74a52e9f59e62042d45a094 100644 (file)
--- a/keyd.c
+++ b/keyd.c
@@ -2,11 +2,13 @@
  * keyd.c - key retrieval daemon
  *
  * Jonathan McDowell <noodles@earth.li>
- * 
+ *
  * Copyright 2004 Project Purple
  */
 
+#include <errno.h>
 #include <fcntl.h>
+#include <getopt.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -27,6 +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;
@@ -311,7 +339,8 @@ int sock_do(int fd)
 
 int sock_close(int fd)
 {
-       return shutdown(fd, SHUT_RDWR);
+       shutdown(fd, SHUT_RDWR);
+       return close(fd);
 }
 
 int sock_accept(int fd)
@@ -340,10 +369,30 @@ int main(int argc, char *argv[])
        int fd = -1;
        fd_set rfds;
        char sockname[1024];
+       char *configfile = NULL;
+       bool foreground = false;
+       int optchar;
+
+       while ((optchar = getopt(argc, argv, "c:f")) != -1 ) {
+               switch (optchar) {
+               case 'c':
+                       configfile = strdup(optarg);
+                       break;
+               case 'f':
+                       foreground = true;
+                       break;
+               }
+       }
 
-       readconfig(NULL);
+       readconfig(configfile);
+       free(configfile);
+       configfile = NULL;
        initlogthing("keyd", config.logfile);
 
+       if (!foreground) {
+               daemonize();
+       }
+
        catchsignals();
        
        snprintf(sockname, 1023, "%s/%s", config.db_dir, KEYD_SOCKET);
@@ -368,6 +417,6 @@ int main(int argc, char *argv[])
 
        cleanuplogthing();
        cleanupconfig();
-       
+
        return(EXIT_SUCCESS);
 }