Text only | Text with Images

newLISP Fan Club

Forum => newLISP and the O.S. => Topic started by: nallen05 on June 21, 2009, 10:00:54 AM

Title: (process "telnet")
Post by: nallen05 on June 21, 2009, 10:00:54 AM
hi



I am trying to script some tests for a network card with newLISP on Windows XP



When I execute
Code Select
(process "telnet") the telnet application hijacks my cmd prompt (so I can't interact with newlisp until I close telnet) and no input/output from newlisp makes it to/from the telnet process.



Is there a way to control telnet from newLISP with `process'?



Thanks for your time



Nick
Title:
Post by: cormullion on June 21, 2009, 02:52:45 PM
I'm not a windows user, but the manual suggests to me that it might be difficult without using peek.


Code Select
(map set '(myin telnetout) (pipe))
(map set '(telnetin myout) (pipe))  

(set 'p (process "/usr/bin/telnet" telnetin telnetout))

(define (telnet s)
   (write-buffer myout (string s "n"))  
   (do-while (!= (peek myin) 0)
       (println "; " (read-line myin))))

(telnet "status")

; telnet> No connection.
; Escape character is '^]'.

(telnet "open 192.168.0.7")

; telnet: connect to address 192.168.0.7: Connection refused
; telnet: Unable to connect to remote host

(destroy p)


which at least looks vaguely promising - the peek helps to get the multiple output lines. But I noticed that the response "Trying 192.168.0.7..." normally seen in the interactive command wasn't collected.



The manual says "Not all interactive console applications can have their standard I/O channels remapped." This might be the case here...



hth
Title: peek / netcat
Post by: nallen05 on June 21, 2009, 03:36:13 PM
hey cormullion



thanks for the quick response :-)



unfortuanatly there is no peek on windows!



my guess is an oddity in the behavior of telnet.exe itself, since people seem to be having trouble scripting it with other languages/tools:



http://www.pcreview.co.uk/forums/thread-1904438.php



I downloaded netcat for windows and (process "nc -t <ip> <port>" ncin ncout) seems to be doing the trick. Now I just have to figure out how to filter out all the goat vomit ;-)



thanks again



Nick
Title:
Post by: TedWalther on June 22, 2009, 10:50:04 AM
In the Code Patterns document, there should be something about "pipes"   You should be using pipes for this.



Ted
Title:
Post by: nallen05 on June 25, 2009, 09:08:12 AM
"STD I/O pipes" or "scripts as pipes"? STD I/O pipes don't seem to work with any telnet application I can find for Windows.



FWIW I moved on to NET-CONNECT/NET-PEEK/NET-RECEIVE/NET-SEND and am having good results directly reading and writing bytes to the telnet server from newlisp...
Text only | Text with Images