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✏️ Editing: ip-pre-up

#!/bin/sh
#
# This script is run by the pppd after the link is established but before it's brought up.
# It uses run-parts to run scripts in /etc/ppp/ip-pre-up.d, so to delete default routes,
# configure the new interface etc. you should create script(s) there.
#
# Be aware that other packages may include /etc/ppp/ip-pre-up.d scripts (named
# after that package), so choose local script names with that in mind.
#
# This script is called with the following arguments:
#    Arg  Name                          Example
#    $1   Interface name                ppp0
#    $2   The tty                       ttyS1
#    $3   The link speed                38400
#    $4   Local IP number               12.34.56.78
#    $5   Peer  IP number               12.34.56.99
#    $6   Optional ``ipparam'' value    foo

# The environment is cleared before executing this script
# so the path must be reset.
PATH=/usr/local/sbin:/usr/sbin:/sbin:/usr/local/bin:/usr/bin:/bin
export PATH

# These variables are for the use of the scripts run by run-parts
PPP_IFACE="$1"
PPP_TTY="$2"
PPP_SPEED="$3"
PPP_LOCAL="$4"
PPP_REMOTE="$5"
PPP_IPPARAM="$6"
export PPP_IFACE PPP_TTY PPP_SPEED PPP_LOCAL PPP_REMOTE PPP_IPPARAM

# as an additional convenience, $PPP_TTYNAME is set to the tty name,
# stripped of /dev/ (if present) for easier matching.
PPP_TTYNAME=$(/usr/bin/basename "$2")
export PPP_TTYNAME

# If /var/log/ppp-ipupdown.log exists use it for logging.
if [ -e /var/log/ppp-ipupdown.log ]; then
  exec > /var/log/ppp-ipupdown.log 2>&1
  echo "$0" "$@"
  echo
fi

# This script can be used to override the .d files supplied by other packages.
if [ -x /etc/ppp/ip-pre-up.local ]; then
  exec /etc/ppp/ip-pre-up.local "$@"
fi

run-parts /etc/ppp/ip-pre-up.d \
  --arg="$1" --arg="$2" --arg="$3" --arg="$4" --arg="$5" --arg="$6"

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