#!/bin/sh

# Look for program[s] somewhere in $PATH.

#

# Options:

#  -s

#    Do not print out full pathname. (silent)

#  -pPATHNAME

#    Look in PATHNAME instead of $PATH

#

# Usage:

#  PrintPath [-s] [-pPATHNAME] program [program ...]

#

# Initially written by Jim Jagielski for the Apache configuration mechanism

#  (with kudos to Kernighan/Pike)

#

# This script falls under the Apache License.

# See http://www.apache.org/licenses/LICENSE

##

# Some "constants"

##

pathname=$PATH

echo="yes"

##

# Find out what OS we are running for later on

##

os=`(uname) 2>/dev/null`

##

# Parse command line

##

for args in $*

do

    case $args in

	-s  ) echo="no" ;;

	-p* ) pathname="`echo $args | sed 's/^..//'`" ;;

	*   ) programs="$programs $args" ;;

    esac

done

##

# Now we make the adjustments required for OS/2 and everyone

# else :)

#

# First of all, all OS/2 programs have the '.exe' extension.

# Next, we adjust PATH (or what was given to us as PATH) to

# be whitespace separated directories.

# Finally, we try to determine the best flag to use for

# test/[] to look for an executable file. OS/2 just has '-r'

# but with other OSs, we do some funny stuff to check to see

# if test/[] knows about -x, which is the preferred flag.

##

if [ "x$os" = "xOS/2" ]

then

    ext=".exe"

    pathname=`echo -E $pathname |

     sed 's/^;/.;/

	  s/;;/;.;/g

	  s/;$/;./

	  s/;/ /g

	  s/\\\\/\\//g' `

    test_exec_flag="-r"

else

    ext=""	# No default extensions

    pathname=`echo $pathname |

     sed 's/^:/.:/

	  s/::/:.:/g

	  s/:$/:./

	  s/:/ /g' `

    # Here is how we test to see if test/[] can handle -x

    testfile="pp.t.$$"

    cat > $testfile <<ENDTEST

#!/bin/sh

if [ -x / ] || [ -x /bin ] || [ -x /bin/ls ]; then

    exit 0

fi

exit 1

ENDTEST

    if `/bin/sh $testfile 2>/dev/null`; then

	test_exec_flag="-x"

    else

	test_exec_flag="-r"

    fi

    rm -f $testfile

fi

for program in $programs

do

    for path in $pathname

    do

	if [ $test_exec_flag $path/${program}${ext} ] && \

	   [ ! -d $path/${program}${ext} ]; then

	    if [ "x$echo" = "xyes" ]; then

		echo $path/${program}${ext}

	    fi

	    exit 0

	fi

# Next try without extension (if one was used above)

	if [ "x$ext" != "x" ]; then

            if [ $test_exec_flag $path/${program} ] && \

               [ ! -d $path/${program} ]; then

                if [ "x$echo" = "xyes" ]; then

                    echo $path/${program}

                fi

                exit 0

            fi

        fi

    done

done

exit 1