#!/bin/sh
PATH=/sbin:/usr/sbin:/bin:/usr/bin

# ifup-post for PPP is handled through /etc/ppp/ip-up

if [ "$1" != daemon ] ; then
  # disconnect stdin, out, err to disassociate from controlling tty
  # so that no HUPs will get through.
  $0 daemon $*& </dev/null >/dev/null 2>/dev/null
  exit 0
fi
shift

CONFIG=$1
. network-functions
source_config

if [ -z "$DISCONNECTTIMEOUT" ]; then
  DISCONNECTTIMEOUT=2
fi

if [ -z "$RETRYTIMEOUT" ]; then
  RETRYTIMEOUT=30
fi

if [ "$2" = "boot" -a "${ONBOOT}" = "no" ]; then
  exit
fi

[ -x /usr/sbin/pppd ] || {
  echo "/usr/sbin/pppd does not exist or is not executable"
  echo "ifup-ppp for $DEVICE exiting"
  logger -p daemon.info -t ifup-ppp \
    "/usr/sbin/pppd does not exist or is not executable for $DEVICE"
  exit 1
}

[ -f /etc/sysconfig/network-scripts/chat-$DEVICE ] || {
  echo "/etc/sysconfig/network-scripts/chat-$DEVICE does not exist"
  echo "ifup-ppp for $DEVICE exiting"
  logger -p daemon.info -t ifup-ppp \
    "/etc/sysconfig/network-scripts/chat-$DEVICE does not exist for $DEVICE"
  exit 1
}

opts="lock"
if [ "${HARDFLOWCTL}" = yes ] ; then
  opts="$opts modem crtscts"
fi
if [ "${ESCAPECHARS}" = yes ] ; then
  opts="$opts asyncmap 00000000"
fi
if [ "${DEFROUTE}" = yes ] ; then
  opts="$opts defaultroute"
fi
if [ -n "${MRU}" ] ; then
  opts="$opts mru ${MRU}"
fi
if [ -n "${MTU}" ] ; then
  opts="$opts mtu ${MTU}"
fi
if [ -n "${IPADDR}${REMIP}" ] ; then
  # if either IP address is set, the following will work.
  opts="$opts ${IPADDR}:${REMIP}"
fi
if [ -n "${PAPNAME}" ] ; then
  opts="$opts name ${PAPNAME}"
fi
if [ "${DEBUG}" = yes ] ; then
  opts="$opts debug"
  chatdbg="-v"
fi

CHATSCRIPT=/etc/sysconfig/network-scripts/chat-$DEVNAME
[ -f $CHATSCRIPT ] || {
  CHATSCRIPT=/etc/sysconfig/network-scripts/chat-$PARENTDEVNAME
}

while : ; do
  (logger -p daemon.info -t ifup-ppp \
    "pppd started for $DEVICE on $MODEMPORT at $LINESPEED" &)&

  > /var/run/ppp-$DEVICE.dev
  /usr/sbin/pppd -detach $opts $MODEMPORT $LINESPEED \
    remotename $DEVICE ipparam $DEVICE \
    ${PPPOPTIONS} \
    connect "/usr/sbin/chat $chatdbg -f $CHATSCRIPT"

  # exit if we're not supposed to persist or our lock file has disappeared 
  if [ "$PERSIST" != "yes" -o ! -f /var/run/ppp-$DEVICE.dev ]; then
    rm -f /var/run/ppp-$DEVICE.dev
    exit 0
  fi

  size=`wc -c < /var/run/ppp-$DEVICE.dev`

  if [ $size = 0 ]; then
    # pppd never connected
    timeout=$RETRYTIMEOUT
  else
    # pppd connected and then disconnected
    timeout=$DISCONNECTTIMEOUT
  fi

  [ -z "$timeout" ] && {
    timeout=30
  }

  sleep $timeout || {
    # sleep was killed
    rm -f /var/run/ppp-$DEVICE.dev
    exit 0
  }

  # exit if our lock file disappeared while we slept
  if [ ! -f /var/run/ppp-$DEVICE.dev ]; then
    exit 0
  fi
done