Reference Link :-
http://frodo.looijaard.name/project/getopt/misc/examples
https://linuxaria.com/howto/parse-options-in-your-bash-script-with-getopt
https://gist.github.com/cosimo/3760587
#!/bin/bash
# Example input and output (from the bash prompt):
# ./parse.bash -a par1 'another arg' --c-long 'wow!*\?' -cmore -b " very long "
# Option a
# Option c, no argument
# Option c, argument `more'
# Option b, argument ` very long '
# Remaining arguments:
# --> `par1'
# --> `another arg'
# --> `wow!*\?'
# Note that we use `"$@"' to let each command-line parameter expand to a
# separate word. The quotes around `$@' are essential!
# We need TEMP as the `eval set --' would nuke the return value of getopt.
TEMP=`getopt -o a:m:h:: --long action:,mode:,help:: -- "$@"`
if [ $? != 0 ] ; then echo "Terminating..." >&2 ; exit 1 ; fi
# Note the quotes around `$TEMP': they are essential!
eval set -- "$TEMP"
while true ; do
case "$1" in
-h|--help) echo "Option h" ; shift ;;
-m|--mode) echo "Option m, argument \`$2'" ; shift 2 ;;
-a|--action) echo "Option a, argument \`$2'" ; shift 2 ;;
--) shift ; break ;;
*) echo "Internal error!" ; exit 1 ;;
esac
done
echo "Remaining arguments:"
for arg do echo '--> '"\`$arg'" ; done