Correct usage of bash getopts using long options -

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i have written below code using long options getopts, doesn't work (arguments have no effect on values of variables). correct syntax?

while getopts "c:(mode)d:(file1)e:(file2)" opt;   case $opt in   -c|--mode)       mode=$optarg       ;;     -d|--file1)       file1=$optarg       ;;     -e|--file2)       file2=$optarg       ;;     esac done

i found code in question ksh , not bash. getopts can't use long options. ended manually parsing arguments below

while test -n "$1";     case "$1" in       -c|--mode)           mode=$2           shift 2           ;;         -d|--file1)           file1=$2           shift 2           ;;         -e|--file2)           file2=$2           shift 2           ;;       esac done

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