examples/functions/ksh-compat-test

   1 #
   2 # replacements for test/[ that do arithmetic expansion on the operands to
   3 # the arithmetic operators, like ksh.
   4 #
   5 function test()
   6 {
   7         local -i n1 n3
   8         case "$#" in
   9         3)      case "$2" in
  10                 -lt|-gt|-eq|-ne|-le|-ge)        n1=$(( $1 ))
  11                                                 n3=$(( $3 ))
  12                                                 builtin test "$n1" $2 "$n3"
  13                                                 return $?;;
  14                 *)      builtin test "$@" ;;
  15                 esac;;
  16         *)      builtin test "$@" ;;
  17         esac
  18 }
  19
  20 function [()
  21 {
  22         local -i n1 n3
  23         case "$#" in
  24         4)      case "$2" in
  25                 -lt|-gt|-eq|-ne|-le|-ge)        n1=$(( $1 ))
  26                                                 n3=$(( $3 ))
  27                                                 builtin [ "$n1" $2 "$n3" ]
  28                                                 return $?;;
  29                 *)      builtin [ "$@" ;;
  30                 esac;;
  31         *)      builtin [ "$@" ;;
  32         esac
  33 }
  34
  35 q=7
  36
  37 [ q -lt 10 ]
  38 echo $?
  39 [ $q -lt 10 ]
  40 echo $?