# # Linux Shell Script Tutoiral # Q14 # -c clear # -d dir # -m mc # -e vi { editor } # # # Function to clear the screen # cls() { clear echo "Clear screen, press a key . . ." read return } # # Function to show files in current directory # show_ls() { ls echo "list files, press a key . . ." read return } # # Function to start mc # start_mc() { if which mc > /dev/null ; then mc echo "Midnight commander, Press a key . . ." read else echo "Error: Midnight commander not installed, Press a key . . ." read fi return } # # Function to start editor # start_ed() { ced=$1 if which $ced > /dev/null ; then $ced echo "$ced, Press a key . . ." read else echo "Error: $ced is not installed or no such editor exist, Press a key . . ." read fi return } # # Function to print help # print_help_uu() { echo "Usage: $0 -c -d -m -v {editor name}"; echo "Where -c clear the screen"; echo " -d show dir"; echo " -m start midnight commander shell"; echo " -e {editor}, start {editor} of your choice"; return } # # Main procedure start here # # Check for sufficent args # if [ $# -eq 0 ] ; then print_help_uu exit 1 fi # # Now parse command line arguments # while getopts cdme: opt do case "$opt" in c) cls;; d) show_ls;; m) start_mc;; e) thised="$OPTARG"; start_ed $thised ;; \?) print_help_uu; exit 1;; esac done