X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=src%2Fapplication.c;h=b7e943d72054e1ff6b8e3246d79363b6660b569f;hb=b43bc048eb4c2c0855d4d7c4ad6b0b3c14e50eb2;hp=96b4204ee6a9e83b7a95be51aa320c6639aab4de;hpb=ba01fa44feb6deb0f0359f381eafe866991c06c1;p=osmocom-bb.git

diff --git a/src/application.c b/src/application.c
index 96b4204..b7e943d 100644
--- a/src/application.c
+++ b/src/application.c
@@ -1,5 +1,6 @@
 /* Utility functions to setup applications */
 /*
+ * (C) 2010 by Harald Welte <laforge@gnumonks.org>
  * (C) 2011 by Holger Hans Peter Freyther
  *
  * All Rights Reserved
@@ -24,6 +25,11 @@
 #include <osmocom/core/logging.h>
 
 #include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <sys/stat.h>
 
 struct log_target *osmo_stderr_target;
 
@@ -38,7 +44,7 @@ void osmo_init_ignore_signals(void)
 
 int osmo_init_logging(const struct log_info *log_info)
 {
-	log_init(log_info);
+	log_init(log_info, NULL);
 	osmo_stderr_target = log_target_create_stderr();
 	if (!osmo_stderr_target)
 		return -1;
@@ -47,3 +53,50 @@ int osmo_init_logging(const struct log_info *log_info)
 	log_set_all_filter(osmo_stderr_target, 1);
 	return 0;
 }
+
+int osmo_daemonize(void)
+{
+	int rc;
+	pid_t pid, sid;
+
+	/* Check if parent PID == init, in which case we are already a daemon */
+	if (getppid() == 1)
+		return -EEXIST;
+
+	/* Fork from the parent process */
+	pid = fork();
+	if (pid < 0) {
+		/* some error happened */
+		return pid;
+	}
+
+	if (pid > 0) {
+		/* if we have received a positive PID, then we are the parent
+		 * and can exit */
+		exit(0);
+	}
+
+	/* FIXME: do we really want this? */
+	umask(0);
+
+	/* Create a new session and set process group ID */
+	sid = setsid();
+	if (sid < 0)
+		return sid;
+
+	/* Change to the /tmp directory, which prevents the CWD from being locked
+	 * and unable to remove it */
+	rc = chdir("/tmp");
+	if (rc < 0)
+		return rc;
+
+	/* Redirect stdio to /dev/null */
+/* since C89/C99 says stderr is a macro, we can safely do this! */
+#ifdef stderr
+	freopen("/dev/null", "r", stdin);
+	freopen("/dev/null", "w", stdout);
+	freopen("/dev/null", "w", stderr);
+#endif
+
+	return 0;
+}