config.tests/unix/which.test

   1 #!/bin/sh
   2
   3 HOME=/dev/null
   4 export HOME
   5
   6 unset which
   7
   8 WHICH=`which which 2>/dev/null`
   9 if echo $WHICH | grep 'shell built-in command' >/dev/null 2>&1; then
  10     WHICH=which
  11 elif [ -z "$WHICH" ]; then
  12     if which which >/dev/null 2>&1; then
  13         WHICH=which
  14     else
  15         for a in /usr/ucb /usr/bin /bin /usr/local/bin; do
  16             if [ -x $a/which ]; then
  17                 WHICH=$a/which
  18                 break;
  19             fi
  20         done
  21     fi
  22 fi
  23
  24 if [ -z "$WHICH" ]; then
  25     IFS=:
  26     for a in $PATH; do
  27         if [ -x $a/$1 ]; then
  28             echo "$a/$1"
  29             exit 0
  30         fi
  31     done
  32 else
  33     a=`"$WHICH" "$1" 2>/dev/null`
  34     if [ ! -z "$a" -a -x "$a" ]; then
  35         echo "$a"
  36         exit 0
  37     fi
  38 fi
  39 exit 1