From 46f96ed5e3127394a0cd4dcb961404b792f743b4 Mon Sep 17 00:00:00 2001
From: Jakub Slawinski
Date: Thu, 10 Jul 2014 10:24:59 +0200
Subject: Initial project structure based on Active Port Forwarder 0.8.4.

---
 src/daemon.c | 73 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 src/daemon.c

(limited to 'src/daemon.c')

diff --git a/src/daemon.c b/src/daemon.c
new file mode 100644
index 0000000..db2195d
--- /dev/null
+++ b/src/daemon.c
@@ -0,0 +1,73 @@
+/*
+ * active port forwarder - software for secure forwarding
+ * Copyright (C) 2003-2007 jeremian <jeremian [at] poczta.fm>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ */
+
+#include "daemon.h"
+
+#ifndef HAVE_DAEMON
+
+#ifndef HAVE_THIS_DAEMON
+#define HAVE_THIS_DAEMON
+
+/*
+ * Function name: daemon
+ * Description: Enters into daemon mode. It's the emulation of the daemon
+ *              function from the system.
+ * Arguments: nochdir - when 0, the directory will be changed to /, otherwise
+ *                      the directory will be unchanged
+ *            noclose - when 0, the standard streams will be closed, otherwise
+ *                      the streams will be unchanged
+ * Returns: 0 - success,
+ *          -1 - failure.
+ */
+
+int
+daemon(int nochdir, int noclose)
+{
+  int retval;
+  if ((retval = fork()) == 0) {
+    /* child process */
+    setsid();
+    if (nochdir == 0) {
+      chdir("/");
+    }
+    if (noclose == 0) {
+      retval = open("/dev/null", O_RDWR);
+      if (retval == -1) {
+        return retval;
+      }
+      dup2(retval, STDIN_FILENO);
+      dup2(retval, STDOUT_FILENO);
+      dup2(retval, STDERR_FILENO);
+      close(retval);
+    }
+  }
+  else {
+    /* parent process */
+    if (retval == -1) {
+      return retval;
+    }
+    _exit(0);
+  }
+  return 0;
+}
+
+#endif
+
+#endif
-- 
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