209 lines
4.7 KiB
Groff
209 lines
4.7 KiB
Groff
.\" $FreeBSD$
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.Dd 26 June 1997
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.Os FreeBSD
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.Dt PPPCTL 8
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.Sh NAME
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.Nm pppctl
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.Nd
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PPP control program
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.Sh SYNOPSIS
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.Nm
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.Op Fl v
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.Op Fl t Ar n
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.Op Fl p Ar passwd
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.Ar [host:]Port | LocalSocket
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.Op command[;command]...
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.Sh DESCRIPTION
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This program provides command line control of the
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.Xr ppp 8
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daemon. Its primary use is to facilitate simple scripts that
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control a running daemon.
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.Pp
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.Nm Pppctl
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is passed at least one argument, specifying the socket on which
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.Nm ppp
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is listening. Refer to the
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.Sq set server
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command of
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.Nm ppp
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for details. If the socket contains a leading '/', it
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is taken as an
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.Dv AF_LOCAL
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socket. If it contains a colon, it is treated as a
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.Ar host:port
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pair, otherwise it is treated as a TCP port specification on the
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local machine (127.0.0.1). Both the
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.Ar host
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and
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.Ar port
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may be specified numerically if you wish to avoid a DNS lookup
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or don't have an entry for the given port in
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.Pa /etc/services .
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.Pp
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All remaining arguments are concatenated to form the
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.Ar command(s)
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that will be sent to the
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.Nm ppp
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daemon. If any semi-colon characters are found, they are treated as
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.Ar command
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delimiters, allowing more than one
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.Ar command
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in a given
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.Sq session .
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For example:
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.Bd -literal -offset indent
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pppctl 3000 set timeout 300\\; show timeout
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.Ed
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.Pp
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Don't forget to escape or quote the ';' as it is a special character
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for most shells.
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.Pp
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If no
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.Ar command
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arguments are given,
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.Nm
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enters interactive mode, where commands are read from standard input.
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When reading commands, the
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.Xr editline 3
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library is used, allowing command-line editing (with
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.Xr editrc 5
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defining editing behaviour). The history size
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defaults to
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.Em 20 lines .
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.Pp
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The following command line options are available:
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.Bl -tag -width Ds
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.It Fl v
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Display all data sent to and received from the
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.Nm ppp
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daemon. Normally,
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.Nm
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displays only non-prompt lines received. This option is ignored in
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interactive mode.
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.It Fl t Ar n
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Use a timeout of
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.Ar n
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instead of the default 2 seconds when connecting. This may be required
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if you wish to control a daemon over a slow (or even a dialup) link.
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.It Fl p Ar passwd
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Specify the password required by the
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.Nm ppp
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daemon. If this switch is not used,
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.Nm
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will prompt for a password once it has successfully connected to
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.Nm ppp .
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.El
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.Pp
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.Sh EXAMPLES
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If you run
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.Nm ppp
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in
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.Fl auto
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mode,
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.Nm
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can be used to automate many frequent tasks (you can actually control
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.Nm ppp
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in any mode except interactive mode). Use of the
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.Fl p
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option is discouraged (even in scripts that aren't readable by others)
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as a
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.Xr ps 1
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listing may reveal your secret.
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.Pp
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The best way to allow easy, secure
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.Nm
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access is to create a local server socket in
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.Pa /etc/ppp/ppp.conf
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(in the correct section) like this:
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.Bd -literal -offset indent
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set server /var/run/internet "" 0177
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.Ed
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.Pp
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This will instruct
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.Nm ppp
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to create a local domain socket, with srw------- permissions and no
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password, allowing access only to the user that invoked
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.Nm ppp .
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Refer to the
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.Xr ppp 8
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man page for further details.
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.Pp
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You can now create some easy-access scripts. To connect to the internet:
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.Bd -literal -offset indent
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#! /bin/sh
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test $# -eq 0 && time=300 || time=$1
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exec pppctl /var/run/internet set timeout $time\\; dial
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.Ed
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.Pp
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To disconnect:
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.Bd -literal -offset indent
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#! /bin/sh
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exec pppctl /var/run/internet set timeout 300\\; close
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.Ed
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.Pp
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To check if the line is up:
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.Bd -literal -offset indent
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#! /bin/sh
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pppctl -p '' -v /var/run/internet quit | grep ^PPP >/dev/null
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if [ $? -eq 0 ]; then
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echo Link is up
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else
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echo Link is down
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fi
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.Ed
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.Pp
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You can even make a generic script:
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.Bd -literal -offset indent
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#! /bin/sh
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exec pppctl /var/run/internet "$@"
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.Ed
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.Pp
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You could also use
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.Nm
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to control when dial-on-demand works. Suppose you want
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.Nm ppp
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to run all the time, but you want to prevent dial-out between 8pm and 8am
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each day. However, any connections active at 8pm should continue to remain
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active until they are closed or naturally time out.
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.Pp
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A
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.Xr cron 8
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entry for 8pm which runs
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.Bd -literal -offset indent
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pppctl /var/run/internet set filter dial 0 deny 0 0
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.Ed
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.Pp
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will block all further dial requests, and the corresponding 8am entry
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.Bd -literal -offset indent
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pppctl /var/run/internet set filter dial -1
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.Ed
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.Pp
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will allow them again.
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.Sh ENVIRONMENT
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The following environment variables are understood by
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.Nm
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when in interactive mode:
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.Bl -tag -width XXXXXXXXXX
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.It Dv EL_SIZE
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The number of history lines. The default is 20.
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.It Dv EL_EDITOR
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The edit mode. Only values of "emacs" and "vi" are accepted. Other values
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are silently ignored. This environment variable will override the
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.Ar bind -v
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and
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.Ar bind -e
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commands in
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.Pa ~/.editrc .
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.El
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.Pp
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.Sh SEE ALSO
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.Xr ps 1 ,
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.Xr editline 3 ,
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.Xr editrc 5 ,
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.Xr services 5 ,
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.Xr ppp 8
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.Sh HISTORY
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The
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.Nm
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command first appeared in FreeBSD 2.2.5.
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