1 #!/bin/sh 2 # Look for program[s] somewhere in $PATH. 3 # 4 # Options: 5 # -s 6 # Do not print out full pathname. (silent) 7 # -pPATHNAME 8 # Look in PATHNAME instead of $PATH 9 # 10 # Usage: 11 # PrintPath [-s] [-pPATHNAME] program [program ...] 12 # 13 # Initially written by Jim Jagielski for the Apache configuration mechanism 14 # (with kudos to Kernighan/Pike) 15 # 16 # This script falls under the Apache License. 17 # See http://www.apache.org/licenses/LICENSE 18 19 ## 20 # Some "constants" 21 ## 22 pathname=$PATH 23 echo="yes" 24 25 ## 26 # Find out what OS we are running for later on 27 ## 28 os=`(uname) 2>/dev/null` 29 30 ## 31 # Parse command line 32 ## 33 for args in $* 34 do 35 case $args in 36 -s ) echo="no" ;; 37 -p* ) pathname="`echo $args | sed 's/^..//'`" ;; 38 * ) programs="$programs $args" ;; 39 esac 40 done 41 42 ## 43 # Now we make the adjustments required for OS/2 and everyone 44 # else :) 45 # 46 # First of all, all OS/2 programs have the '.exe' extension. 47 # Next, we adjust PATH (or what was given to us as PATH) to 48 # be whitespace separated directories. 49 # Finally, we try to determine the best flag to use for 50 # test/[] to look for an executable file. OS/2 just has '-r' 51 # but with other OSs, we do some funny stuff to check to see 52 # if test/[] knows about -x, which is the preferred flag. 53 ## 54 55 if [ "x$os" = "xOS/2" ] 56 then 57 ext=".exe" 58 pathname=`echo -E $pathname | 59 sed 's/^;/.;/ 60 s/;;/;.;/g 61 s/;$/;./ 62 s/;/ /g 63 s/\\\\/\\//g' ` 64 test_exec_flag="-r" 65 else 66 ext="" # No default extensions 67 pathname=`echo $pathname | 68 sed 's/^:/.:/ 69 s/::/:.:/g 70 s/:$/:./ 71 s/:/ /g' ` 72 # Here is how we test to see if test/[] can handle -x 73 testfile="pp.t.$$" 74 75 cat > $testfile <<ENDTEST 76 #!/bin/sh 77 if [ -x / ] || [ -x /bin ] || [ -x /bin/ls ]; then 78 exit 0 79 fi 80 exit 1 81 ENDTEST 82 83 if `/bin/sh $testfile 2>/dev/null`; then 84 test_exec_flag="-x" 85 else 86 test_exec_flag="-r" 87 fi 88 rm -f $testfile 89 fi 90 91 for program in $programs 92 do 93 for path in $pathname 94 do 95 if [ $test_exec_flag $path/${program}${ext} ] && \ 96 [ ! -d $path/${program}${ext} ]; then 97 if [ "x$echo" = "xyes" ]; then 98 echo $path/${program}${ext} 99 fi 100 exit 0 101 fi 102 103 # Next try without extension (if one was used above) 104 if [ "x$ext" != "x" ]; then 105 if [ $test_exec_flag $path/${program} ] && \ 106 [ ! -d $path/${program} ]; then 107 if [ "x$echo" = "xyes" ]; then 108 echo $path/${program} 109 fi 110 exit 0 111 fi 112 fi 113 done 114 done 115 exit 1 116 117
