#!/bin/sh
# which --- show first instance of program in path
# Author: Noah Friedman <friedman@prep.ai.mit.edu>
# Created: 1991-07-17
# Last modified: 1994-03-09
# Public domain.

if test $# = 0; then
  echo "Usage: which {prog}" 1>&2
  exit 1
fi

case $1 in
    /* ) if test -f "$1"; then
             echo "$1"
             exit 0;
         fi ;;
esac

path=`echo $PATH | sed -e 's/^:/.:/;s/::/:.:/g;s/:$/:./;s/:/ /g'`

for p in $path ; do
  if test -f "$p/$1" ; then
    echo "$p/$1"
    exit 0
  fi
done

exit 1

# which ends here