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Full Discussion: how to use telnet in script
Top Forums Shell Programming and Scripting how to use telnet in script Post 302112964 by mady on Monday 2nd of April 2007 08:24:37 AM
Old 04-02-2007
this one is working, but it exits the telnet session at the end. i want the script to make a permanant connection to the server so that whenever i want to connect, i can just run the script instead of entering all the credinals.
Quote:
Originally Posted by vgersh99
I second the above!
Here's the "poor-man's" inline telnet which might not be bullet-proof for all the cases:
Code:
    (
    sleep 3
    print user
    sleep 1
    print password
    sleep 2
    print "ls ~"
    sleep 1
    print "exit"
    sleep 3
    ) | telnet hostname

 

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SLEEP(1)						    BSD General Commands Manual 						  SLEEP(1)

NAME
sleep -- suspend execution for an interval of time SYNOPSIS
sleep seconds DESCRIPTION
The sleep command suspends execution for a minimum of seconds. If the sleep command receives a signal, it takes the standard action. When the SIGINFO signal is received, the estimate of the amount of seconds left to sleep is printed on the standard output. IMPLEMENTATION NOTES
The SIGALRM signal is not handled specially by this implementation. The sleep command allows and honors a non-integer number of seconds to sleep in any form acceptable by strtod(3). This is a non-portable extension, and its use will nearly guarantee that a shell script will not execute properly on another system. EXIT STATUS
The sleep utility exits 0 on success, and >0 if an error occurs. EXAMPLES
To schedule the execution of a command for x number seconds later (with csh(1)): (sleep 1800; sh command_file >& errors)& This incantation would wait a half hour before running the script command_file. (See the at(1) utility.) To reiteratively run a command (with the csh(1)): while (1) if (! -r zzz.rawdata) then sleep 300 else foreach i (`ls *.rawdata`) sleep 70 awk -f collapse_data $i >> results end break endif end The scenario for a script such as this might be: a program currently running is taking longer than expected to process a series of files, and it would be nice to have another program start processing the files created by the first program as soon as it is finished (when zzz.rawdata is created). The script checks every five minutes for the file zzz.rawdata, when the file is found, then another portion processing is done courteously by sleeping for 70 seconds in between each awk job. SEE ALSO
nanosleep(2), sleep(3) STANDARDS
The sleep command is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible. HISTORY
A sleep command appeared in Version 4 AT&T UNIX. BSD
April 18, 1994 BSD
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