Well I determined that whatever Livecode is using on a Mac is what the shell
expects for newline characters. I determined this by manually replacing all
newlines in the property inspector (where I keep the shell code) with whatever
the return key produces. I then copied the value from the property editor and
then pasted it into the terminal window. I got EXACTLY what I expected, that
is, the output of the telnet session.
HOWEVER... When I try to use the Livecode SHELL() to pass the property that
way, the shell command returns:
Connection closed by foreign host.
The file contains:
Trying 172.16.0.121...
Connected to 172.16.0.121.
Escape character is '^]'.
This tells me that for whatever reason, everything that telnet is saying is NOT
being sent to the file. The file gets everything before telnet kicks in, and
the SHELL() function returns everything AFTER telnet exits, but everything
between is hidden from the shell command.
Now here is where things get interesting. I opened the applescript dictionary
for terminal, and discovered they had a do script command. Hmmm... So I fiddled
with the editor until I got an applescript that did essentially the same thing.
I ran it, and lo and behold my text file output of my mac addresses appeared,
amidst some garbled stuff, but then I can do lineoffsets and clean all that up
fine.
Next, I copied the successful code into my Livecode property, and instead of
using the Livecode SHELL() command, I used do myScript as Applescript. Dammit
if it didn't work just fine!!
So then, I think this establishes that there is some kind of problem with the
way the shell command interacts with the terminal. I would call this a bug, but
I don't know enough about what is going on in the background to do so. It may
be some kind of internal OS security issue, but then why would Applescript work
fine doing essentially the same thing, which is telling the shell process to
run a script?
Anyway, I have a solution, and others may profit from what I have discovered.
Here is the Applescript I produced:
copy "telnet 172.16.0.121 >" & quote & "/Users/Shared/scanout.txt" & quote &
return to theScript
copy theScript & "theUser" & return to theScript
copy theScript & "thePassword" & return to theScript
copy theScript & "print " & quote & "show mac-address" & quote & return &
return to theScript
copy theScript & "exit" & return & "exit" & return to theScript
copy theScript & "y" & return & "n" & return to theScript
tell application "Terminal"
do script theScript
end tell
Before sending this I replace theUser and thePassword with the actual ones of
course.
Bob
On Dec 10, 2011, at 4:53 AM, Bernard Devlin wrote:
> Could it be an issue with the "return" character? As you know, they are
> different on each platform. You could try variations between ascii 10 and
> 13.
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