1.\" Copyright (c) 1999 Berkeley Software Design, Inc. All rights reserved. 2.\" 3.\" Redistribution and use in source and binary forms, with or without 4.\" modification, are permitted provided that the following conditions 5.\" are met: 6.\" 1. Redistributions of source code must retain the above copyright 7.\" notice, this list of conditions and the following disclaimer. 8.\" 2. Redistributions in binary form must reproduce the above copyright 9.\" notice, this list of conditions and the following disclaimer in the 10.\" documentation and/or other materials provided with the distribution. 11.\" 3. Berkeley Software Design Inc's name may not be used to endorse or 12.\" promote products derived from this software without specific prior 13.\" written permission. 14.\" 15.\" THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN INC ``AS IS'' AND 16.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18.\" ARE DISCLAIMED. IN NO EVENT SHALL BERKELEY SOFTWARE DESIGN INC BE LIABLE 19.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25.\" SUCH DAMAGE. 26.\" 27.\" $FreeBSD$ 28.\" 29.Dd March 19, 2007 30.Dt DAEMON 8 31.Os 32.Sh NAME 33.Nm daemon 34.Nd run detached from the controlling terminal 35.Sh SYNOPSIS 36.Nm 37.Op Fl cf 38.Op Fl p Ar pidfile 39.Op Fl u Ar user 40.Ar command arguments ... 41.Sh DESCRIPTION 42The 43.Nm 44utility detaches itself from the controlling terminal and 45executes the program specified by its arguments. 46Privileges may be lowered to the specified user. 47.Pp 48The options are as follows: 49.Bl -tag -width indent 50.It Fl c 51Change the current working directory to the root 52.Pq Dq Pa / . 53.It Fl f 54Redirect standard input, standard output and standard error to 55.Pa /dev/null . 56.It Fl p Ar file 57Write the ID of the created process into the 58.Ar file 59using the 60.Xr pidfile 3 61functionality. 62If the 63.Fl u 64option is used, either the pidfile needs to have been pre-created 65with appropriate ownership and permissions, or the directory to contain 66the pidfile must be writable by the specified user. 67Note, that the file will be created shortly before the process is 68actually executed, and will remain after the process exits (although 69it will be removed if the execution fails). 70.It Fl u Ar user 71Login name of the user to execute the program under. 72Requires adequate superuser privileges. 73.El 74.Sh EXIT STATUS 75The 76.Nm 77utility exits 1 if an error is returned by the 78.Xr daemon 3 79library routine, 2 if the 80.Ar pidfile 81is requested, but cannot be opened, 3 if process is already running (pidfile 82exists and is locked), 83otherwise 0. 84.Sh DIAGNOSTICS 85If the command cannot be executed, an error message is displayed on 86standard error unless the 87.Fl f 88flag is specified. 89.Sh SEE ALSO 90.Xr setregid 2 , 91.Xr setreuid 2 , 92.Xr daemon 3 , 93.Xr exec 3 , 94.Xr pidfile 3 , 95.Xr termios 4 , 96.Xr tty 4 97.Sh HISTORY 98The 99.Nm 100utility first appeared in 101.Fx 4.7 . 102