I am writing a shell script to parse options. It parses the options correctly but when I omit any input arguments it doesn't come out of the while loop. Can anyone help on this?
TEMP=`getopt -o ha:b:d:e:c: --l ca: \-n "$x" -- "$@"`
eval set -- "$TEMP"
while true; do
case "$1" in
-h) print $USAGE
exit 0 ;;
-a) case "$2" in
-*|"") error "Option t, requires argument";
exit 1;;
*) print $2
T=${2^^} ;
shift 2 ;;
esac ;;
-b) case "$2" in
-*|"") error "Option p, requires argument";
exit 1 ;;
*) print $2
PE=${2^^} ;
shift 2 ;
esac ;;
-d) case "$2" in
-*|"") error "Option f, requires argument";
exit 1 ;;
*) print $2 ;
IN=$2 ;
shift 2 ;;
esac ;;
-e) case "$2" in
""|-*) error "Option e, requires argument";
exit 1 ;;
*) print $2 ;
KEY=$2 ;
shift 2 ;;
esac ;;
-c|--ca) case "$2" in
""|-*) error "Option c, requires argument";
exit 1;;
*) print $2 ;
C=${2};
shift 2 ;;
esac ;;
--) shift ;
break ;;
*) error "Invalid Input!" ;
exit 1 ;;
esac
done
USAGE:foo.sh -a arg1 -b arg2 -c arg3 -d arg 4 -e arg5
This works fine but
foo.sh -a arg1 -b arg2 -c arg3
doesn't come out of the while loop.
You don't ever exit the loop; how do you expect an exit to happen? A common arrangement is to examine $#
at the top, and only proceed if it is zonzero.