Case command

The syntax of the case command is

case word in

pattern1 ) list1 ;;

pattern2 | pattern3 ) list2 ;;

...

esac

qsh expands each pattern in turn and sees if it matches the expansion of word. When there is a match, qsh runs the corresponding list. After the first match, no more patterns are expanded. See "Shell Patterns" for more details on patterns.

Examples

1. A case command for processing command line options.

   while getopts ap:t: c ; do
     case $c in
       a) aflag=1;;
       p) pflag=1
          path=$OPTARG;;
       t) time=$OPTARG;;
       *) print -u2 "Invalid option"
          exit 1;;
     esac
   done