#!/bin/sh
#
# Wait for a command to run and then trap it in gdb.
#

set -x

pid=0
#timeout=$((30))
timeout=$((30*5))
tick=0

GDB=gdb

waitname=$1
if [ "x$waitname" = "x" ]; then
   echo "$0: no program name specified"
fi

until [ $tick = $timeout ];
do
    #line=$(killall -s -0 $waitname 2>/dev/null)
    # Linux doesn't like -s...
    #line=$(killall -v -0 $waitname 2>&1)
    #last=$?
    #if [ $last = 0 ]; then
        #pid=$(echo $line | awk '{print $NF}')
        pid=$(pidof $waitname)
        if [ "x$pid" != "x" ]; then
         break
        fi
        #break
    #fi
    echo -n '.'
    #sleep 1
    sleep 0.2
    tick=$((tick+1))
done

if [ $pid = 0 ]; then
   echo "$0: timed out waiting for $waitname"
   exit 1
fi

echo "running gdb with pid $pid"
# FreeBSD:
#exec $GDB -e $waitname -p $pid
# Linux:
#exec $GDB --se=$waitname $pid
exec $GDB $waitname $pid