Installing and Administering PPP

Chapter 4 69

Common pppd Options

The exec Option

Example

This example uses a Login shell script to invoke an executable shell

script called $PPPHOME/Exec. $PPPHOME/Exec causes sendmail to run

its queue whenever a remote system establishes a connection, possibly

triggering a delivery to the remote system.

#!/bin/sh

PATH=/usr/bin:/usr/etc:/etc:/bin

PPPHOME=/etc/ppp

export PPPHOME PATH

mesg n

stty -tostop

exec pppd ‘hostname‘: idle 130 exec $PPPHOME/Exec

Executable Shell Script:

#!/bin/sh

case "$1" in

up) echo link is up at ‘date‘ > /dev/console ;

/usr/lib/sendmail -q < /dev/null ;;

down) echo link is down at ‘date‘ > /dev/console ;;

esac

PPP_ORIG_NETMASK Original netmask.

PPP_INTERFACE Name of PPP interface (DUX).

PPP_DEVICE Name of device being used for serial stream.

PPP_LOGFILE Self-explanatory.

PPP_ACCTFILE Self-explanatory.

PPP_AUTHNAME Peer name if CHAP/PAP is used, else “name”

parameter from command line, if given. Else

user name of user that started pppd.

PPP_PID pppd user process PID.

PPP_SHUTDOWN Shutdown reason if link is going down and a

shutdown reason is available, else non-existent.

Variable Description