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Full Discussion: /usr/bin/expect script truncates data
Top Forums Shell Programming and Scripting /usr/bin/expect script truncates data Post 302902543 by black_fender on Wednesday 21st of May 2014 04:23:32 AM
Old 05-21-2014
/usr/bin/expect script truncates data
I have a script on a Linux machine that connects remotely, via telnet on a windows machine to launch several commands and colect their output. On the Linux machine the output of these commands is redirected in a file.

The script:
Code:
#!/usr/bin/expect

log_user 0
spawn telnet 10.10.10.10
expect "login name:"
send "user1\r"
expect "password:"
send "Pa$$w0rd@\r"
expect "Windows NT Domain:"
send "\r"
#expect "C:\WINNT\Profiles\focore>"
sleep 1
send "echo prcstate\r"
send "prcstate -l\r"
sleep 1
send "echo hwmls\r"
send "hwmls\r"
sleep 1
send "echo hwmscbls\r"
send "hwmscbls\r"
sleep 1
send "echo cluster res\r"
send "cluster res\r"
sleep 1
send "echo cluster node\r"
send "cluster node\r"
sleep 1
send "echo cluster group\r"
send "cluster group\r"
sleep 1
send "echo cluster netint\r"
send "cluster netint\r"
sleep 1
send "echo mtzln -p\r"
send "mtzln -p\r"
sleep 1
send "echo time /t\r"
send "time /t\r"
sleep 1
send "echo date /t\r"
send "date /t\r"


send "exit\r"
interact
exit

When I launch the script "manually" from the shell
Code:
 ./expect.sh > output.txt

The entire output is capted.
When I schedule the script in crontab no output is capted (probably due to the "interact" part of the script).
When I use a wrapper script which launches expect.sh and schedule the wrapper script in crontab output.txt contains only exactly 4.0 Kb and truncates the output of the commands in expect.sh
Code:
 cat wrapper.sh
#!/bin/bash

target_log=/absolute_path/output.txt

rm -f $target_log

/absolute_path/expect.sh >> $target_log

I'm new to expect and I don;t know how to overcome this. I've red about a full_buffer command but didn;t succeed to get the right syntax to implement it in my script.
Any ideas how to overcome this ?
 

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LEARN ABOUT MOJAVE

term_send

term::send(n)							 Terminal control						     term::send(n)

__________________________________________________________________________________________________________________________________________________

NAME

       term::send - General output to terminals

SYNOPSIS

       package require Tcl  8.4

       package require term::send  ?0.1?

       ::term::send::wrch chan str

       ::term::send::wr str

_________________________________________________________________

DESCRIPTION

       This  package provides the most primitive commands for sending characters to a terminal. They are in essence convenient wrappers around the
       builtin command puts.

       ::term::send::wrch chan str
	      Send the text str to the channel specified by the handle chan.  In contrast to the builtin command puts this command does not termi-
	      nate  the  string  with a line terminator. It also forces an  flush of Tcl internal and OS buffers to ensure that the characters are
	      processed immediately.

       ::term::send::wr str
	      This convenience command is like ::term::send::wrch, except that the destination channel is fixed to stdout.

BUGS, IDEAS, FEEDBACK
       This document, and the package it describes, will undoubtedly contain bugs and other problems.  Please report such in the category term	of
       the  Tcllib  SF	Trackers [http://sourceforge.net/tracker/?group_id=12883].  Please also report any ideas for enhancements you may have for
       either package and/or documentation.

KEYWORDS

       character output, control, terminal

CATEGORY

       Terminal control

COPYRIGHT

       Copyright (c) 2006 Andreas Kupries <andreas_kupries@users.sourceforge.net>

term									0.1							     term::send(n)
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