2009-09-19 Tatsuhiro Tsujikawa <t-tujikawa@users.sourceforge.net>

	Added our own daemon() function for systems which desn't have
	daemon(3).
	* configure.ac
	* src/Makefile.am
	* src/daemon.cc
	* src/daemon.h
	* src/option_processing.cc

1 files changed, 80 insertions, 0 deletions

diff --git a/src/daemon.cc b/src/daemon.cc
new file mode 100644
index 00000000..04b37e00
--- /dev/null
+++ b/src/daemon.cc
@@ -0,0 +1,80 @@
+/* <!-- copyright */
+/*
+ * aria2 - The high speed download utility
+ *
+ * Copyright (C) 2009 Tatsuhiro Tsujikawa
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * In addition, as a special exception, the copyright holders give
+ * permission to link the code of portions of this program with the
+ * OpenSSL library under certain conditions as described in each
+ * individual source file, and distribute linked combinations
+ * including the two.
+ * You must obey the GNU General Public License in all respects
+ * for all of the code used other than OpenSSL.  If you modify
+ * file(s) with this exception, you may extend this exception to your
+ * version of the file(s), but you are not obligated to do so.  If you
+ * do not wish to do so, delete this exception statement from your
+ * version.  If you delete this exception statement from all source
+ * files in the program, then also delete it here.
+ */
+/* copyright --> */
+#include "daemon.h"
+
+#include <unistd.h>
+#include <cstdio>
+#include <cstdlib>
+
+namespace aria2 {
+
+int daemon(int nochdir, int noclose)
+{
+  pid_t pid;
+  pid = fork();
+  if(pid == -1) {
+    return -1;
+  } else if(pid > 0) {
+    exit(EXIT_SUCCESS);
+  }
+  if(setsid() == -1) {
+    return -1;
+  }
+  pid = fork();
+  if(pid == -1) {
+    return -1;
+  } else if(pid > 0) {
+    exit(EXIT_SUCCESS);
+  }
+  if(nochdir == 0) {
+    if(chdir("/") == -1) {
+      return -1;
+    }
+  }
+  if(noclose == 0) {
+    if(freopen("/dev/null", "r", stdin) == 0) {
+      return -1;
+    }
+    if(freopen("/dev/null", "w", stdout) == 0) {
+      return -1;
+    }
+    if(freopen("/dev/null", "w", stderr) == 0) {
+      return -1;
+    }
+  }
+  return 0;
+}
+
+} // namespace aria2