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