From a44fea3cff11bf65aec751dc949aa7f789eb8564 Mon Sep 17 00:00:00 2001
From: Eric Andersen <andersen@codepoet.org>
Date: Tue, 3 Apr 2001 23:55:10 +0000
Subject: Add in daemon.c, now used by busybox.  -Erik

---
 libc/unistd/Makefile |  2 +-
 libc/unistd/daemon.c | 95 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 96 insertions(+), 1 deletion(-)
 create mode 100644 libc/unistd/daemon.c

diff --git a/libc/unistd/Makefile b/libc/unistd/Makefile
index d128e14bc..7202d0983 100644
--- a/libc/unistd/Makefile
+++ b/libc/unistd/Makefile
@@ -26,7 +26,7 @@ LIBC=$(TOPDIR)libc.a
 DIRS:=
 
 CSRC=execl.c execlp.c execv.c execvep.c execvp.c getcwd.c getopt.c \
-	sleep.c getpass.c sysconf_src.c getopt_vars.c
+	sleep.c getpass.c sysconf_src.c getopt_vars.c daemon.c
 
 # TESTING -- comment this out if it breaks for you
 ifeq ($(TARGET_ARCH), $(NATIVE_ARCH))
diff --git a/libc/unistd/daemon.c b/libc/unistd/daemon.c
new file mode 100644
index 000000000..2bd9f6f76
--- /dev/null
+++ b/libc/unistd/daemon.c
@@ -0,0 +1,95 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * daemon implementation for uClibc
+ *
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * The uClibc Library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ * 
+ * The GNU C Library 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
+ * Library General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Library General Public
+ * License along with the GNU C Library; see the file COPYING.LIB.  If not,
+ * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA. 
+ *
+ * Original copyright notice is retained at the end of this file.
+ */
+
+#include <fcntl.h>
+#include <paths.h>
+#include <unistd.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)
+	chdir("/");
+
+    if (!noclose && (fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) {
+	dup2(fd, STDIN_FILENO);
+	dup2(fd, STDOUT_FILENO);
+	dup2(fd, STDERR_FILENO);
+	if (fd > 2)
+	    close(fd);
+    }
+    return(0);
+}
+
+
+
+/*-
+ * 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. <BSD Advertising Clause omitted per the July 22, 1999 licensing change 
+ *		ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change> 
+ *
+ * 4. 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.
+ */
+
+
-- 
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