UNIX for Dummies Questions & Answers

#!/bin/bash

killtree() {
    local _pid=$1
    local _sig=${2-TERM}
    for _child in $(ps -o pid --no-headers --ppid ${_pid}); do
        killtree ${_child} ${_sig}
    done
    kill -${_sig} ${_pid}
}

if [ $# -eq 0 -o $# -gt 2 ]; then
    echo "Usage: $(basename $0) <pid> [signal]"
    exit 1
fi

killtree $@
#
#       ......
#
while [ $(ps -p $! -o etime= | tr -d ": ") -lt 10000 ]
do
  sleep 60
done 2> /dev/null

kill -s SIGHUP $!

function my_ps()
function killps()   # kill by process name
{
   local pid pname sig="-TERM"   # default signal
   if [ "$#" -lt 1 ] || [ "$#" -gt 2 ]; then
       echo "Usage: killps [-SIGNAL] pattern"
       return;
   fi
   if [ $# = 2 ]; then sig=$1 ; fi
   for pid in $(.............) ; do
       pname=$(................... )
       if ask "Kill process $pid <$pname> with signal $sig?"
           then kill $sig $pid
       fi
   done
}
_killall ()
{
    COMPREPLY=( $( /bin/ps -u $USER -o comm  | \
        sed -e '1,1d' -e 's#[]\[]##g' -e 's#^.*/##'| \
        awk '{if ($0 ~ /^$USER/) print $0}' ))

    return 0
}
complete -F _killall killall killps