File: toplus.sh
   1 #!/bin/sh
   2 
   3 # The MIT License (MIT)
   4 #
   5 # Copyright (c) 2026 pacman64
   6 #
   7 # Permission is hereby granted, free of charge, to any person obtaining a copy
   8 # of this software and associated documentation files (the "Software"), to deal
   9 # in the Software without restriction, including without limitation the rights
  10 # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11 # copies of the Software, and to permit persons to whom the Software is
  12 # furnished to do so, subject to the following conditions:
  13 #
  14 # The above copyright notice and this permission notice shall be included in
  15 # all copies or substantial portions of the Software.
  16 #
  17 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  20 # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23 # SOFTWARE.
  24 
  25 
  26 # toplus [seconds...] [options...]
  27 #
  28 # Run `top` using better default settings. Unlike running `top`, this tool
  29 # avoids leaving any output on the screen once done. Updates happen every 2
  30 # seconds by default, unless you change it by giving an argument which looks
  31 # like a number, without decimals.
  32 #
  33 # As when running `top` directly, pressing `q` quits. You can also force-quit
  34 # this tool by pressing Ctrl+C.
  35 #
  36 # The options are, available both in single and double-dash versions
  37 #
  38 #   -h, -help    show this help message
  39 
  40 
  41 # This version is compatible with busybox/alpine-linux.
  42 
  43 case "$1" in
  44     -h|--h|-help|--help)
  45         awk '/^# +toplus /, /^$/ { gsub(/^# ?/, ""); print }' "$0"
  46         exit 0
  47     ;;
  48 esac
  49 
  50 seconds=2
  51 if echo "$1" | grep -E -q '^[0-9]+$'; then
  52     seconds="$1"
  53     shift
  54 fi
  55 
  56 # restore previous screen contents when sent a SIGINT signal, which usually
  57 # happens by pressing Ctrl+C
  58 trap 'printf "\e[?1049l\e[23;0;0t"; exit 130' INT
  59 
  60 printf "\e[?1049h\e[22;0;0t"
  61 top -d "${seconds}" "$@"
  62 code=$?
  63 printf "\e[?1049l\e[23;0;0t"
  64 exit "${code}"