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Homework and Emergencies Homework & Coursework Questions VM trap may work differently than a pure install trap. Post 302809621 by bakunin on Monday 20th of May 2013 09:21:27 AM
Old 05-20-2013
Originally Posted by newuser45
#! /bin/bash
trap " echo 'I have trapped CTRL-C'" SIGTERM SIGINT
echo "Start of the program..."
while [ $count -lt 10 ]
        echo "Loop #$count"
        sleep 10
        count=$[ count + 1]
echo "End of the program..."

I pasted the quoted code into a file and ran it and - to my surprise - it worked. I would have expected this:

        count=$[ count + 1]

to caue problems, it "just doesn't seem right", but then, i use Korn Shell most of the times and avoid bash like the plague. I would have written:

        (( count += 1 ))

which should do the same and is POSIXly correct (notice the spaces around "((" and "))", they are necessary), but: never argue with success, yours obviously works.

One thing i noticed, though, was: as soon as i pressed "CTRL-C" the trap was executed but the "sleep 10" was interrupted and then skipped. Pressing CTRL-C often enough let me get through with the script in less than half a minute, whereas 10x 10 seconds of sleeping should have taken 1min 40sec (plus some for the rest).

So, probably there is something with your setup. I have no idea what that would be, though. I tried in an XTerm on Fedora without any real changes and it worked as expected.

I hope this helps.

Test Your Knowledge in Computers #678
Difficulty: Medium
Wi-Fi positioning systems use the positions of local cellular towers to identify the location of a Wi-Fi device.
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debconf-mergetemplate - merge together multiple debconf template files SYNOPSIS
debconf-mergetemplate [options] [templates.ll ...] templates DESCRIPTION
Note: This utility is deprecated. You should switch to using po-debconf's po2debconf program. This program is useful if you have multiple debconf templates files which you want to merge together into one big file. All the specified files will be read in, merged, and output to standard output. This can be especially useful if you are dealing with translated template files. In this case, you might have your main template file, plus several other files provided by the translators. These files will have translated fields in them, and maybe the translators left in the english versions of the fields they translated, for their reference. So, you want to merge together all the translated templates files with your main templates file. Any fields that are unique to the translated files need to be added in to the correct templates, but any fields they have in common should be superseded by the fields in the main file (which might be more up-to-date). This program handles that case properly, just list each of the translated templates files, and then your main templates file last. OPTIONS
--outdated Merge in even outdated translations. The default is to drop them with a warning message. --drop-old-templates If a translation has an entire template that is not in the master file (and thus is probably an old template), drop that entire template. SEE ALSO
debconf-getlang(1) AUTHOR
Joey Hess <> 2012-09-10 DEBCONF-MERGETEMPLATE(1)

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