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- #!/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
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