contrib/scripts/exec_show.lua

   1 -- Authors: Sadrul Habib Chowdhury <imadil@gmail.com>
   2 -- License: Public domain
   3 -- Last Changed: Unknown
   4 --
   5 -- exec_show.lua: executes a command and displays the result
   6 --
   7 -- this script is meant to be used when the output for the command
   8 -- doesn't have more than a screenful of lines (approx 30-35 lines).
   9 -- eg. tail, head, grep, ps ... etc.
  10 --
  11 -- CAUTION
  12 -- DO NOT use this to execute something like xterm, vi or anything
  13 -- similar (use the given key-bindings like MOD2..F2/F3/F4/F5 for those).
  14 --
  15 -- do let me know if this doesn't work for someone.
  16 --
  17 -- Author
  18 -- Sadrul Habib Chowdhury (Adil)
  19 -- imadil at gmail dot com
  20
  21 function show_result(mp, msg)
  22     mod_query.message(mp, msg)
  23 end
  24
  25 function my_exec_handler(mp, cmd)
  26     -- not defer-ing was causing some probs
  27     ioncore.defer(
  28         function ()
  29             local f = io.popen(cmd, 'r')
  30             if not f then
  31                 show_result(mp, 'error executing command: ' .. cmd)
  32                 return
  33             end
  34
  35             local s = f:read('*a')
  36             if s then
  37                 show_result(mp, s)
  38             else
  39                 show_result(mp, 'no output')
  40             end
  41             f:close()   -- remove this, and watch your life get ruined (thanx Tuomo)
  42         end
  43     )
  44
  45 end
  46
  47 function exec_and_show(mplex)
  48     mod_query.query(mplex, TR("Exec and display:"), nil, my_exec_handler,
  49             mod_query.exec_completor,
  50             "execdisplay")
  51 end
  52
  53 defbindings("WMPlex", {
  54     bdoc("Execute a command and show the result."),
  55     kpress(MOD1.."F4", "exec_and_show(_)"),     -- change the binding to your liking
  56 })
  57