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.Dd March 1, 2017
.Dt VLOGGER 8
.Os
.Sh NAME
.Nm vlogger
.Nd log messages to syslog or an arbitrary executable
.Sh SYNOPSIS
.Nm vlogger
.Op Fl isS
.Op Fl f Ar file
.Op Fl p Ar pri
.Op Fl t Ar tag
.Op Ar message ...
.Sh DESCRIPTION
The
.Nm
utility writes messages to the system log or an arbitrary executable.
.Pp
If
.Nm
is executed as
.Nm logger
it will always use the system log and behave like the regular
.Xr logger 1 .
.Pp
Without
.Ar message
arguments
.Nm
reads messages from
.Dv stdin
or the file specified with the
.Fl f
flag.
If the
.Pa /etc/vlogger
executable exists
.Nm
executes it with
.Ar tag ,
.Ar level
and
.Ar facility
as arguments,
replacing the
.Nm
process.
.Pp
If
.Nm
is executed as a log service for
.Xr runit 8
or another daemontools like
supervision suite it uses the service name as default
.Ar tag .
As example if
.Nm
is linked to
.Pa /var/service/foo/log/run
it uses
.Dq foo
as
.Ar tag
and
.Dq daemon.notice
as
.Ar pri .
.Pp
The options are as follows:
.Bl -tag -width "-f file"
.It Fl f Ar file
Read lines from the specified
.Ar file .
This option cannot be combine
.Ar message
arguments.
.It Fl i
Log the PID of the
.Nm
process.
Only supported if
.Xr syslog 3
is used.
.It Fl p Ar pri
The.
.Ar pri
can be
.Pa facility.level
or just
.Pa facility .
See
.Sx FACILITIES ,
.Sx LEVELS
or
.Xr syslog 3 .
The default is
.Dq user.notice .
.It Fl S
Force
.Nm
to use
.Xr syslog 3
even if
.Pa /etc/vlogger
exists.
.It Fl s
Output the message to standard error, as well as
.Xr syslog 3 .
Only supported if
.Xr syslog 3
is used.
.It Fl t Ar tag
Defines the
.Xr openlog 3
.Pa ident
which is used as prefix for each log message or passed as first argument to
.Pa /etc/vlogger .
The default is the
.Ev LOGNAME
environment variable.
.It Ar message
Write the
.Ar message
to the system log.
.El
.Sh FACILITIES
.Bl -tag -width 11n -compact
.It auth
.It authpriv
.It cron
.It daemon
.It ftp
.It kern
can not be used from userspace replaced with
.Pa daemon .
.It lpr
.It mail
.It news
.It syslog
.It user
.It uucp
.It local[0-7]
.It security
deprecated synonym for
.Pa auth .
.El
.Sh LEVELS
.Bl -tag -width 11n -compact
.It emerg
.It alert
.It crit
.It err
.It warning
.It notice
.It info
.It debug
.It panic
deprecated synonym for
.Pa emerg .
.It error
deprecated synonym for
.Ar err .
.It warn
deprecated synonym for
.Pa warning .
.El
.Sh FILES
.Bl -tag -width indent
.It /etc/vlogger
An optional executable file that is used to handle the messages.
It is executed with
.Ar tag ,
.Ar level
and
.Ar facility
as arguments
and replaces the
.Nm
process.
.El
.Sh EXIT STATUS
.Ex -std
.Sh EXAMPLES
.Pa /etc/vlogger :
.Bd -literal -offset indent
#!/bin/sh
exec svlogd /var/log/$1
.Ed
.Sh SEE ALSO
.Xr logger 1 ,
.Xr syslog 3 ,
.Xr svlogd 8
.Sh HISTORY
This program is a replacement for the
.Nm logger
utility provided by
.Nm util-linux .
.Sh AUTHORS
.An Duncan Overbruck Aq Mt mail@duncano.de
.Sh LICENSE
.Nm
is in the public domain.
.Pp
To the extent possible under law,
the creator of this work
has waived all copyright and related or
neighboring rights to this work.
.Pp
.Lk http://creativecommons.org/publicdomain/zero/1.0/