Initial Contribution
diff --git a/libc/unistd/daemon.c b/libc/unistd/daemon.c
new file mode 100644
index 0000000..8181d16
--- /dev/null
+++ b/libc/unistd/daemon.c
@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
+ * COPYRIGHT OWNER 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 <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+int daemon( int nochdir, int noclose )
+{
+ pid_t pid;
+
+ if ( !nochdir && chdir("/") != 0 )
+ return -1;
+
+ if ( !noclose )
+ {
+ int fd = open("/dev/null", O_RDWR);
+
+ if ( fd < 0 )
+ return -1;
+
+ if ( dup2( fd, 0 ) < 0 ||
+ dup2( fd, 1 ) < 0 ||
+ dup2( fd, 2 ) < 0 )
+ {
+ close(fd);
+ return -1;
+ }
+ close(fd);
+ }
+
+ pid = fork();
+ if (pid < 0)
+ return -1;
+
+ if (pid > 0)
+ _exit(0);
+
+ if ( setsid() < 0 )
+ return -1;
+
+ return 0;
+}
+