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$FreeBSD: head/usr.sbin/daemon/daemon.8 208190 2010-05-17 11:18:33Z ivoras $
.Dd March 19, 2007 .Dt DAEMON 8 .Os .Sh NAME .Nm daemon .Nd run detached from the controlling terminal .Sh SYNOPSIS .Nm .Op Fl cf .Op Fl p Ar pidfile .Op Fl u Ar user .Ar command arguments ... .Sh DESCRIPTION The .Nm utility detaches itself from the controlling terminal and executes the program specified by its arguments. Privileges may be lowered to the specified user.
p The options are as follows: l -tag -width indent t Fl c Change the current working directory to the root
q Dq Pa / . t Fl f Redirect standard input, standard output and standard error to
a /dev/null . t Fl p Ar file Write the ID of the created process into the .Ar file using the .Xr pidfile 3 functionality. Note, that the file will be created shortly before the process is actually executed, and will remain after the process exits (although it will be removed if the execution fails). t Fl u Ar user Login name of the user to execute the program under. Requires adequate superuser privileges. .El .Sh EXIT STATUS The .Nm utility exits 1 if an error is returned by the .Xr daemon 3 library routine, 2 if the .Ar pidfile is requested, but cannot be opened, 3 if process is already running (pidfile exists and is locked), otherwise 0. .Sh DIAGNOSTICS If the command cannot be executed, an error message is displayed on standard error unless the .Fl f flag is specified. .Sh SEE ALSO .Xr setregid 2 , .Xr setreuid 2 , .Xr daemon 3 , .Xr exec 3 , .Xr pidfile 3 , .Xr termios 4 , .Xr tty 4 .Sh HISTORY The .Nm utility first appeared in .Fx 4.7 .