如何用 Linux 拨号上网(3)

# If you use the ppp-on script, then these are passed to this routine
# automatically. There is no need to define them here. If not, then
# you will need to set the values.
#
ACCOUNT=my_account_name
PASSWORD=my_password
###################################################################
#
# Function to initialize the modem and ensure that it is in command
# state. This may not be needed, but it doesn't hurt.
#
function initialize
{
chat -v TIMEOUT 3 '' AT 'OK- \c-OK'
return
}
###################################################################
#
# Script to dial a telephone
#
function callnumber
{
chat -v \
ABORT '\nBUSY\r' \
ABORT '\nNO ANSWER\r' \
ABORT '\nRINGING\r\n\r\nRINGING\r' \
'' ATDT$1 \
CONNECT '' \
ogin:--ogin: $ACCOUNT \
assword: $PASSWORD
#
# If the connection was successful then end the whole script with a
# success.
#
if [ "$?" = "0" ]; then
exit 0
fi
return
}
###################################################################
#
# Script to dial any telephone number
#
function callall
{
# echo "dialing attempt number: $1" >/dev/console
callnumber $PHONE1
# callnumber $PHONE2
}
###################################################################
#
# Initialize the modem to ensure that it is in the command state
#
initialize
if [ ! "$?" = "0" ]; then
exit 1
fi
#
# Dial telephone numbers until one answers
#
attempt=0
while : ; do
attempt=`expr $attempt 1`
callall $attempt
if [ "$attempt" = "$MAX_ATTEMPTS" ]; then
exit 1
fi
sleep "$SLEEP_DELAY"
done

附录五：PPP 断开脚本 ppp-off

#!/bin/sh
######################################################################
#
# Determine the device to be terminated.
#
if [ "$1" = "" ]; then
DEVICE=ppp0
else
DEVICE=$1
fi
######################################################################
#
# If the ppp0 pid file is present then the program is running. Stop it.
if [ -r /var/run/$DEVICE.pid ]; then
kill -INT `cat /var/run/$DEVICE.pid`
#
# If the kill did not work then there is no process running for this
# pid. It may also mean that the lock file will be left. You may wish
# to delete the lock file at the same time.
if [ ! "$?" = "0" ]; then
rm -f /var/run/$DEVICE.pid
echo "ERROR: Removed stale pid file"
exit 1
fi
#
# Success. Let pppd clean up its own junk.
echo "PPP link to $DEVICE terminated."
exit 0
fi
#
# The ppp process is not running for ppp0
echo "ERROR: PPP link is not active on $DEVICE"
exit 1

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