143 lines
4.0 KiB
Groff
143 lines
4.0 KiB
Groff
|
.\" Copyright (c) 2007-2015 The OpenRC Authors.
|
||
|
|
.\" See the Authors file at the top-level directory of this distribution and
|
||
|
|
.\" https://github.com/OpenRC/openrc/blob/master/AUTHORS
|
||
|
|
.\"
|
||
|
|
.\" This file is part of OpenRC. It is subject to the license terms in
|
||
|
|
.\" the LICENSE file found in the top-level directory of this
|
||
|
|
.\" distribution and at https://github.com/OpenRC/openrc/blob/master/LICENSE
|
||
|
|
.\" This file may not be copied, modified, propagated, or distributed
|
||
|
|
.\" except according to the terms contained in the LICENSE file.
|
||
|
|
.\"
|
||
|
|
.Dd April 27, 2016
|
||
|
|
.Dt supervise-DAEMON 8 SMM
|
||
|
|
.Os OpenRC
|
||
|
|
.Sh NAME
|
||
|
|
.Nm supervise-daemon
|
||
|
|
.Nd starts a daemon and restarts it if it crashes
|
||
|
|
.Sh SYNOPSIS
|
||
|
|
.Nm
|
||
|
|
.Fl d , -chdir
|
||
|
|
.Ar path
|
||
|
|
.Fl e , -env
|
||
|
|
.Ar var=value
|
||
|
|
.Fl g , -group
|
||
|
|
.Ar group
|
||
|
|
.Fl I , -ionice
|
||
|
|
.Ar arg
|
||
|
|
.Fl k , -umask
|
||
|
|
.Ar value
|
||
|
|
.Fl N , -nicelevel
|
||
|
|
.Ar level
|
||
|
|
.Fl p , -pidfile
|
||
|
|
.Ar pidfile
|
||
|
|
.Fl u , -user
|
||
|
|
.Ar user
|
||
|
|
.Fl r , -chroot
|
||
|
|
.Ar chrootpath
|
||
|
|
.Fl 1 , -stdout
|
||
|
|
.Ar logfile
|
||
|
|
.Fl 2 , -stderr
|
||
|
|
.Ar logfile
|
||
|
|
.Fl S , -start
|
||
|
|
.Ar daemon
|
||
|
|
.Op Fl -
|
||
|
|
.Op Ar arguments
|
||
|
|
.Nm
|
||
|
|
.Fl K , -stop
|
||
|
|
.Ar daemon
|
||
|
|
.Fl p , -pidfile
|
||
|
|
.Ar pidfile
|
||
|
|
.Fl r , -chroot
|
||
|
|
.Ar chrootpath
|
||
|
|
.Sh DESCRIPTION
|
||
|
|
.Nm
|
||
|
|
provides a consistent method of starting, stopping and restarting
|
||
|
|
daemons. If
|
||
|
|
.Fl K , -stop
|
||
|
|
is not provided, then we assume we are starting the daemon.
|
||
|
|
.Nm
|
||
|
|
only works with daemons which do not fork. Also, it uses its own pid
|
||
|
|
file, so the daemon should not write a pid file, or the pid file passed
|
||
|
|
to
|
||
|
|
.Nm
|
||
|
|
should not be the one the daemon writes.
|
||
|
|
.Pp
|
||
|
|
Here are the options to specify the daemon and how it should start or stop:
|
||
|
|
.Bl -tag -width indent
|
||
|
|
.It Fl p , -pidfile Ar pidfile
|
||
|
|
When starting, we write a
|
||
|
|
.Ar pidfile
|
||
|
|
so we know which supervisor to stop. When stopping we only stop the pid(s)
|
||
|
|
listed in the
|
||
|
|
.Ar pidfile .
|
||
|
|
.It Fl u , -user Ar user Ns Op : Ns Ar group
|
||
|
|
Start the daemon as the
|
||
|
|
.Ar user
|
||
|
|
and update $HOME accordingly or stop daemons
|
||
|
|
owned by the user. You can optionally append a
|
||
|
|
.Ar group
|
||
|
|
name here also.
|
||
|
|
.It Fl v , -verbose
|
||
|
|
Print the action(s) that are taken just before doing them.
|
||
|
|
.Pp
|
||
|
|
The options are as follows:
|
||
|
|
.Bl -tag -width indent
|
||
|
|
.It Fl d , -chdir Ar path
|
||
|
|
chdir to this directory before starting the daemon.
|
||
|
|
.It Fl e , -env Ar VAR=VALUE
|
||
|
|
Set the environment variable VAR to VALUE.
|
||
|
|
.It Fl g , -group Ar group
|
||
|
|
Start the daemon as in the group.
|
||
|
|
.It Fl I , -ionice Ar class Ns Op : Ns Ar data
|
||
|
|
Modifies the IO scheduling priority of the daemon.
|
||
|
|
Class can be 0 for none, 1 for real time, 2 for best effort and 3 for idle.
|
||
|
|
Data can be from 0 to 7 inclusive.
|
||
|
|
.It Fl k , -umask Ar mode
|
||
|
|
Set the umask of the daemon.
|
||
|
|
.It Fl N , -nicelevel Ar level
|
||
|
|
Modifies the scheduling priority of the daemon.
|
||
|
|
.It Fl r , -chroot Ar path
|
||
|
|
chroot to this directory before starting the daemon. All other paths, such
|
||
|
|
as the path to the daemon, chdir and pidfile, should be relative to the chroot.
|
||
|
|
.It Fl u , -user Ar user
|
||
|
|
Start the daemon as the specified user.
|
||
|
|
.It Fl 1 , -stdout Ar logfile
|
||
|
|
Redirect the standard output of the process to logfile.
|
||
|
|
Must be an absolute pathname, but relative to the path optionally given with
|
||
|
|
.Fl r , -chroot .
|
||
|
|
The logfile can also be a named pipe.
|
||
|
|
.It Fl 2 , -stderr Ar logfile
|
||
|
|
The same thing as
|
||
|
|
.Fl 1 , -stdout
|
||
|
|
but with the standard error output.
|
||
|
|
.El
|
||
|
|
.Sh ENVIRONMENT
|
||
|
|
.Va SSD_NICELEVEL
|
||
|
|
can also set the scheduling priority of the daemon, but the command line
|
||
|
|
option takes precedence.
|
||
|
|
.Sh NOTE
|
||
|
|
.Nm
|
||
|
|
uses
|
||
|
|
.Xr getopt 3
|
||
|
|
to parse its options, which allows it to accept the `--' option which will
|
||
|
|
cause it to stop processing options at that point. Any subsequent arguments
|
||
|
|
are passed as arguments to the daemon to start and used when finding a daemon
|
||
|
|
to stop or signal.
|
||
|
|
.Sh SEE ALSO
|
||
|
|
.Xr chdir 2 ,
|
||
|
|
.Xr chroot 2 ,
|
||
|
|
.Xr getopt 3 ,
|
||
|
|
.Xr nice 2 ,
|
||
|
|
.Xr rc_find_pids 3
|
||
|
|
.Sh BUGS
|
||
|
|
.Nm
|
||
|
|
cannot stop an interpreted daemon that no longer exists without a pidfile.
|
||
|
|
.Sh HISTORY
|
||
|
|
.Nm
|
||
|
|
first appeared in Debian.
|
||
|
|
.Pp
|
||
|
|
This is a complete re-implementation with the process finding code in the
|
||
|
|
OpenRC library (librc, -lrc) so other programs can make use of it.
|
||
|
|
.Sh AUTHORS
|
||
|
|
.An William Hubbs <w.d.hubbs@gmail.com>
|