release/src/router/pppd/scripts/poff

   1 #!/bin/sh
   2
   3 # $Id: poff,v 1.1 2002/11/24 23:30:44 etbe Exp $
   4 # Written by John Hasler <john@dhh.gt.org> and based on work
   5 # by Phil Hands <phil@hands.com>.  Distributed under the GNU GPL
   6
   7 if [ -x /usr/bin/kill ]; then
   8   KILL="/usr/bin/kill"
   9 else
  10   KILL="/bin/kill"
  11 fi
  12 SIG=TERM
  13 DONE="stopped"
  14 MODE=""
  15
  16 usage ()
  17 {
  18    cat <<!EOF!
  19 usage: $0 [option] [provider]
  20 options:
  21   -r        Cause pppd to drop the line and redial.
  22   -d        Toggle the state of pppd's debug option.
  23   -c        Cause pppd to renegotiate compression.
  24   -a        Stop all pppd's.  'provider' will be ignored.
  25   -h        Print this help summary and exit.
  26   -v        Print version and exit.
  27   none      Stop pppd.
  28
  29 Options may not be combined.
  30
  31 If 'provider' is omitted pppd will be stopped or signalled if and only if
  32 there is exactly one running unless the '-a' option was given.  If
  33 'provider' is supplied the pppd controlling the connection to that
  34 provider will be stopped or signalled.
  35 !EOF!
  36 }
  37
  38 # Get option.  If there are none replace the "?" that getopts puts in
  39 # FLAG on error with "null".
  40 getopts rdcavh FLAG
  41 if [ "$?" -ne 0 ]; then
  42     FLAG="null"
  43 fi
  44
  45 # Check for additional options.  Should be none.
  46 getopts :rdcavh DUMMY
  47 if [ "$?" -eq 0 ]; then
  48     echo "$0: Illegal option -- ${OPTARG}."
  49     exit 1
  50 fi
  51
  52 case $FLAG in
  53  "r") SIG=HUP;  DONE=signalled; shift ;;
  54  "d") SIG=USR1; DONE=signalled; shift ;;
  55  "c") SIG=USR2; DONE=signalled; shift ;;
  56  "a") MODE="all"; shift ;;
  57  "v") echo "$0$Revision: 1.1 $_TrickToPrint_RCS_Revision"; exit 0 ;;
  58  "h") usage; exit 0 ;;
  59  "?") exit 1;
  60 esac
  61
  62 # Get the PIDs of all the pppds running.  Could also get these from
  63 # /var/run, but pppd doesn't create .pid files until ppp is up.
  64 PIDS=`pidof pppd`
  65
  66 # poff is pointless if pppd isn't running.
  67 if test -z "$PIDS"; then
  68     echo "$0: No pppd is running.  None ${DONE}."
  69     exit 1
  70 fi
  71
  72 # Find out how many pppd's are running.
  73 N=`echo "$PIDS" | wc -w`
  74
  75 # If there are no arguments we can't do anything if there is more than one
  76 # pppd running.
  77 if test "$#" -eq 0 -a "$N" -gt 1 -a $FLAG != "a" ; then
  78     echo "$0: More than one pppd running and no "-a" option and
  79 no arguments supplied. Nothing ${DONE}."
  80     exit 1
  81 fi
  82
  83 # If either there are no arguments or '-a' was specified kill all the
  84 # pppd's.
  85 if test "$#" -eq 0 -o "$MODE" = "all" ; then
  86     $KILL -$SIG $PIDS || {
  87         echo "$0: $KILL failed.  None ${DONE}."
  88         exit 1
  89     }
  90     exit 0
  91 fi
  92
  93 # There is an argument, so kill the pppd started on that provider.
  94 PID=`ps axw | grep "[ /]pppd call $1 *\$" | awk '{print $1}'`
  95 if test -n "$PID" ; then
  96     $KILL -$SIG $PID || {
  97         echo "$0: $KILL failed.  None ${DONE}."
  98         exit 1
  99     }
 100 else
 101    echo "$0: I could not find a pppd process for provider '$1'. None ${DONE}."
 102    exit 1
 103 fi
 104 exit 0