iwhich

: Use /bin/sh
#
# $Id: iwhich,v 1.2 1995/10/11 02:31:58 geoff Exp $
#
# Report which version of a command is in use.  This version of
# "which" doesn't handle shell aliases, but it makes up for that with
# the "-a" (report all copies) switch and the fact that it returns a
# nonzero shell status if the command isn't found.
#
USAGE='Usage:  which [-a] command[s]'
#
# For each command, the full pathname of the version that will be
# selected from $PATH is reported.  If the -a switch is given,
# versions in $PATH that are overridden by earlier $PATH entries will
# also be reported.  The exit status is nonzero if none of the
# commands are found anywhere in $PATH.
#
# $Log: iwhich,v $
# Revision 1.2  1995/10/11 02:31:58  geoff
# Work around a buggy version of Ultrix test
#
# Revision 1.1  1995/01/15  00:13:54  geoff
# Initial revision
#
#
opath=$PATH
PATH=/bin:/usr/bin
all=no
while [ $# -gt 0 ]
do
    case "$1" in
	-a)
	    all=yes
	    shift
	    ;;
	-*)
	    echo "$USAGE" 1>&2
	    exit 2
	    ;;
	*)
	    break
	    ;;
    esac
done
case $# in
    0)
	echo "$USAGE" 1>&2
	exit 2
	;;
esac
opath=`echo "$opath" | sed 's/^:/.:/
			  s/::/:.:/g
			  s/:$/:./
			  s/:/ /g'`
found=false
for file
do
    for i in $opath
    do
	if [ \( -x $i/$file \) -a \( ! -d $i/$file \) ]
	then
	    echo $i/$file
	    found=true
	    case "$all" in
		no)
		    break
		    ;;
	    esac
	fi
    done
done
if $found
then
    exit 0
else
    exit 1
fi