.\" Copyright (c) 1994 Christoph M. Robitschko .\" 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. All advertising materials mentioning features or use of this software .\" must display the following acknowledgement: .\" This product includes software developed by Christoph M. Robitschko .\" 4. The name of the author may not be used to endorse or promote products .\" derived from this software withough specific prior written permission .\" .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. .\" .\" $Id$ .\" .Dd January 28, 1994 .Dt daemon 3 .Os FreeBSD .Sh NAME .Nm daemon .Nd become a daemon process .Sh SYNOPSIS .Ft int .Fn daemon "int nochdir" "int noclose" .Sh DESCRIPTION The .Fn daemon function makes the calling process into a daemon process: it forks and continues as the child process (while the parent exits with a 0 exit value) , creates a new session, disassociates itself from the controlling terminal, closes stdin, stdout and stderr (unless .Fa noclose is nonzero) and changes the working directory to the root directory (unless .Fa nochdir is nonzero). .Sh RETURN VALUES .Fn daemon returns -1 if the fork failed, or 0 otherwise. .Sh SEE ALSO .Xr fork 2 , .Xr exit 2 , .Xr setsid 2 , .Xr chdir 2 .Sh FILES .Pa /usr/lib/libutil.a The name of the library these functions are part of.