File: cio.sh
   1 #!/bin/sh
   2 
   3 # The MIT License (MIT)
   4 #
   5 # Copyright © 2020-2025 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 # cio
  27 #
  28 # Clipboard IO automatically figures out whether to copy/paste the text
  29 # clipboard, depending on the piping of its standard input/output.
  30 #
  31 # When both its standard input/output are piped, it first updates the text
  32 # clipboard, and then emits its new value to stdout.
  33 #
  34 # When run on its own (unpiped), it just emits the current text clipboard
  35 # value to stdout.
  36 
  37 
  38 # handle help option(s)
  39 case "$1" in
  40     -h|--h|-help|--help)
  41         awk '/^# +cio/, /^$/ { gsub(/^# ?/, ""); print }' "$0"
  42         exit 0
  43     ;;
  44 esac
  45 
  46 get_clip() {
  47     if [ -e /dev/clipboard ]; then
  48         cat /dev/clipboard
  49         return $?
  50     fi
  51     if [ "$(which wclip)" ]; then
  52         wclip -o
  53         return $?
  54     fi
  55     if [ "$(which xclip)" ]; then
  56         xclip -sel clip -o
  57         return $?
  58     fi
  59     if [ "$(which pbpaste)" ]; then
  60         pbpaste
  61         return $?
  62     fi
  63     if [ "$(which powershell.exe)" ]; then
  64         powershell.exe -NoProfile -c '
  65             chcp 65001 | Out-Null
  66             Get-Clipboard
  67         '
  68         return $?
  69     fi
  70 
  71     printf "\e[31mcan't use the clipboard\e[0m\n" > /dev/stderr
  72     exit 1
  73 }
  74 
  75 set_clip() {
  76     if [ -e /dev/clipboard ]; then
  77         cat > /dev/clipboard
  78         return $?
  79     fi
  80     if [ "$(which wclip)" ]; then
  81         wclip
  82         return $?
  83     fi
  84     if [ "$(which xclip)" ]; then
  85         xclip -sel clip
  86         return $?
  87     fi
  88     if [ "$(which pbcopy)" ]; then
  89         pbcopy
  90         return $?
  91     fi
  92 
  93     if [ "$(which powershell.exe)" ]; then
  94         powershell.exe -NoProfile -c '
  95             chcp 65001 | Out-Null
  96             clip.exe
  97         '
  98         return $?
  99     fi
 100 
 101     printf "\e[31mcan't use the clipboard\e[0m\n" > /dev/stderr
 102     exit 1
 103 }
 104 
 105 # handle both `... | cio` and `... | cio | ...`
 106 if [ -p /dev/stdin ]; then
 107     cat | set_clip
 108     # ... | cio | ...
 109     if [ -p /dev/stdout ]; then
 110         get_clip
 111     fi
 112     exit $?
 113 fi
 114 
 115 # handle `cio | ...`
 116 if [ -p /dev/stdout ]; then
 117     get_clip
 118     exit $?
 119 fi
 120 
 121 # handle `cio ...`
 122 if [ $# -gt 0 ]; then
 123     cat "$@" | set_clip
 124     exit $?
 125 fi
 126 
 127 # handle `cio`
 128 get_clip
 129 exit $?