help

   1 #!/bin/sh
   2
   3 # usage:        help - Lists all the available commands
   4 #               help <command> - Detailled explanation of how "command" works
   5
   6 if tty -s
   7 then
   8         HELPTEXT="Hi $USER, Run 'help' for help, 'help <command>' for specific help on a command, run 'exit' to exit. Available commands:"
   9 else
  10         HELPTEXT="Hi $USER, Run 'help' for help, 'help <command>' for specific help on a command. Available commands:"
  11 fi
  12
  13 cd "$(dirname "$0")"
  14
  15 if [[ ! -z $1 ]]; then
  16         cmd=$1
  17         if [[ -f $cmd && -x $cmd ]]; then
  18                 awk 'NR>=3&&NR<=4' $cmd | cut -c 3-
  19         else
  20                 echo "command \"$cmd\" doesn't exists"
  21         fi
  22 else
  23         echo $HELPTEXT
  24         for cmd in *
  25         do
  26                 case "$cmd" in
  27                 help) ;;
  28                 *) [ -f "$cmd" ] && [ -x "$cmd" ] && echo "$cmd" ;;
  29                 esac
  30         done
  31 fi
  32