expect_out buffer no such variable running script background


 
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Old 10-01-2010
expect_out buffer no such variable running script background

I am trying to use send and receive using expect. the expect_out(buffer) is working fine while it is running it as foreground. But the same script when it is ran as background, the expect_out(buffer) errored out.

Is there any factor influence when we run script in foreground and in background?

Please through some lights on this.

sample part of script

<..>
send "RTRV-COND-ALL:::P;";
expect ">"
set out $expect_out(buffer)
puts $out
<..>

---------- Post updated 10-01-10 at 11:04 AM ---------- Previous update was 09-30-10 at 11:37 PM ----------

Issue got fixed. The expect_out(buffer) is working fine while running in background...

It was an environmental issue.
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EXIM_CONVERT4R4(8)                                            System Manager's Manual                                           EXIM_CONVERT4R4(8)

NAME
exim_convert4r4 - Convert Exim configuration from v3 to v4 format SYNOPSIS
exim_convert4r4 DESCRIPTION
This script is provided to assist in updating Exim configuration files. It reads an Exim 3 configuration file on the standard input, and writes a modified file on the standard output. It also writes comments about what it has done to the standard error file. It assumes that the input is a valid Exim 3 configuration file. A typical call to the conversion script might be exim_convert4r4 < /etc/exim/exim.conf > /etc/exim4/exim4.conf.new The output file MUST be checked and tested before trying to use it on a live system. The conversion script is just an aid which does a lot of the "grunt work". It does not guarantee to produce an Exim 4 configuration that behaves exactly the same as the Exim 3 configuration it reads. Each option change in the new file is preceded by an identifying comment. In fact, the conversion script tends to make quite a mess of your configuration, and you should expect to go through it afterwards and tidy it up by hand. Unless you are running a very straightforward configuration, the automatic conversion is likely to generate a non-optimal configuration. You should not only check it thoroughly, but also run as many tests as you can, to ensure that it is working as you expect. In particular, you should test address routing, using -bt and -bv, and the policy controls, using -bh. If possible, you should also do some live tests (i.e. send and receive some messages) before putting Exim 4 into service. If you have a very complicated configuration, it is possible that exim_convert4r4 will break it in some situations, which is why thorough testing is strongly recommended. BUGS
This manual page needs a major re-work. If somebody knows better groff than us and has more experience in writing manual pages, any patches would be greatly appreciated. SEE ALSO
exim(8), the files in /usr/share/doc/exim4-base/, especially Exim4.upgrade.gz AUTHOR
This manual page was stitched together from Exim4.upgrade by Andreas Metzler <ametzler at downhill.at.eu.org>, for the Debian GNU/Linux system (but may be used by others). March 26, 2003 EXIM_CONVERT4R4(8)