support/ppp/poff

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