From fed1a3ba8ab6d2ee1b81ca9c2bfe8039632f47b1 Mon Sep 17 00:00:00 2001
From: Nicholas Marriott <nicholas.marriott@gmail.com>
Date: Wed, 18 Jun 2008 19:36:27 +0000
Subject: [PATCH] compat/daemon.c

---
 GNUmakefile     |  4 +--
 compat/daemon.c | 66 +++++++++++++++++++++++++++++++++++++++++++++++++
 tmux.h          |  7 +++++-
 3 files changed, 74 insertions(+), 3 deletions(-)
 create mode 100644 compat/daemon.c

diff --git a/GNUmakefile b/GNUmakefile
index 06866f79..9085d307 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -1,4 +1,4 @@
-# $Id: GNUmakefile,v 1.21 2008-06-18 19:34:50 nicm Exp $
+# $Id: GNUmakefile,v 1.22 2008-06-18 19:36:27 nicm Exp $
 
 .PHONY: clean
 
@@ -53,7 +53,7 @@ INSTALLMAN= install -g bin -o root -m 444
 
 ifeq ($(shell uname),SunOS)
 INCDIRS+= -Icompat
-SRCS+= compat/strtonum.c
+SRCS+= compat/strtonum.c compat/daemon.c
 CFLAGS+= -DNO_STRTONUM -DNO_TREE_H -DNO_PATHS_H -DNO_SETPROCTITLE \
 	-DNO_DAEMON
 endif 
diff --git a/compat/daemon.c b/compat/daemon.c
new file mode 100644
index 00000000..420f58dc
--- /dev/null
+++ b/compat/daemon.c
@@ -0,0 +1,66 @@
+/*	$OpenBSD: daemon.c,v 1.6 2005/08/08 08:05:33 espie Exp $ */
+/*-
+ * Copyright (c) 1990, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <fcntl.h>
+#include <paths.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+#include "tmux.h"
+
+int
+daemon(int nochdir, int noclose)
+{
+	int fd;
+
+	switch (fork()) {
+	case -1:
+		return (-1);
+	case 0:
+		break;
+	default:
+		_exit(0);
+	}
+
+	if (setsid() == -1)
+		return (-1);
+
+	if (!nochdir)
+		(void)chdir("/");
+
+	if (!noclose && (fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) {
+		(void)dup2(fd, STDIN_FILENO);
+		(void)dup2(fd, STDOUT_FILENO);
+		(void)dup2(fd, STDERR_FILENO);
+		if (fd > 2)
+			(void)close (fd);
+	}
+	return (0);
+}
diff --git a/tmux.h b/tmux.h
index 2430dd0f..93005d73 100644
--- a/tmux.h
+++ b/tmux.h
@@ -1,4 +1,4 @@
-/* $Id: tmux.h,v 1.146 2008-06-18 19:34:50 nicm Exp $ */
+/* $Id: tmux.h,v 1.147 2008-06-18 19:36:27 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -760,6 +760,11 @@ size_t	 	 strlcpy(char *, const char *, size_t);
 size_t	 	 strlcat(char *, const char *, size_t);
 #endif
 
+#ifdef NO_DAEMON
+/* daemon.c */
+size_t	 	 daemon(int, int);
+#endif
+
 /* tmux.c */
 extern volatile sig_atomic_t sigwinch;
 extern volatile sig_atomic_t sigterm;