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 9, 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 u Ar user 39.Op Fl g Ar group 40.Op Fl p Ar pidfile 41.Ar command arguments ... 42.Sh DESCRIPTION 43The 44.Nm 45utility detaches itself from the controlling terminal and 46executes the program specified by its arguments. 47Privileges may be lowered to specified user and/or group. 48.Pp 49The options are as follows: 50.Bl -tag -width indent 51.It Fl c 52Change the current working directory to the root 53.Pq Dq Pa / . 54.It Fl f 55Redirect standard input, standard output and standard error to 56.Pa /dev/null . 57.It Fl g Ar group 58Drop privileges to specified group. 59.It Fl p Ar file 60Write the ID of the created process into the 61.Ar file 62using 63.It Fl u Ar user 64Drop privileges to specified user. 65.Xr pidfile 3 66functionality. 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.El 71.Sh EXIT STATUS 72The 73.Nm 74utility exits 1 if an error is returned by the 75.Xr daemon 3 76library routine, 2 if the 77.Ar pidfile 78is requested, but cannot be opened, 3 if process is already running (pidfile 79exists and is locked), 80otherwise 0. 81.Sh DIAGNOSTICS 82If the command cannot be executed, an error message is displayed on 83standard error unless the 84.Fl f 85flag is specified. 86.Sh SEE ALSO 87.Xr setregid 2 , 88.Xr setreuid 2 , 89.Xr daemon 3 , 90.Xr exec 3 , 91.Xr pidfile 3 , 92.Xr termios 4 , 93.Xr tty 4 94.Sh HISTORY 95The 96.Nm 97utility first appeared in 98.Fx 4.7 . 99