On 5 Dec 2007, at 12:18, Klaus Major wrote:

revCopyFile uses Applescrip which is blocking! At least in Rev, but NOT when
using the same script with the AppleScriptEditor!? :-/
Using "shell" is also blocking!

This has come up a few times on the list, and basically revolves around using a shell command that sends it's output to a text file instead of back to Rev.

Rev carries on because as far as it's concerned the shell command has finished, then you can do some kind of loop checking the output text file, without blocking.

On 14 Aug 2006, at 09:48, Brian Yennie wrote:

You might try something like:

get shell("mylongcommand > output.txt &")

This should redirect the output to a file and return immediately. It's not as clean as triggering a "done" message with new syntax would be, but it may be workable. You might try searching the archives - I seem to recall discussing this one many moons ago...

And:

On 12 Nov 2006, at 23:52, Sarah Reichelt wrote:

function checkPing pIP
  put specialFolderPath("Desktop") & "/ping.txt" into tFileName
  if there is a file tFileName then delete file tFileName

  put "ping -c1 -n "  & pIP into tShellCmd
  put " > " & tFileName & " 2>&1 &" after tShellCmd
  get shell(tShellCmd)

  put 0 into timeCheck
  repeat 50 times
      add 1 to timeCheck
      wait 1 tick with messages
      if there is a file tFileName then
          put URL ("file:" & tFileName) into tRes
if tRes is empty then next repeat -- file created but no result yet

          put wordOffset("loss", tRes) into tWord
          if tWord = 0 then next repeat -- file created but result
not complete

          -- if there is a file tFileName then delete file tFileName
          put word tWord-2 of tRes into tPercent
          if tPercent = "0%" then return true
          else return false
      end if
  end repeat

  if there is a file tFileName then delete file tFileName
  return false
end checkPing

Ian
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