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Full Discussion: possible sed usage
Top Forums Shell Programming and Scripting possible sed usage Post 302240906 by madpenguin on Saturday 27th of September 2008 01:43:35 AM
Old 09-27-2008
possible sed usage
Sorry about the title. I'm assuming I want sed anyway...

Here's the deal:

I have hundreds of files in a folder and they all are named with the same format.

$NAME-$VERSION-$ARCH-$BUILD

This is Slackwares' /var/log/packages directory BTW...

$BUILD is what I'm focusing on. It could be just "1" or it could be "1foo" or it could be "1foo357" or "1foo357bar"

I'm trying to isolate just the "1" regardless of what comes after it. I came to the conclusion that just identifying the last hyphen and then grabbing the very next number would be the easiest way.

This is what worked great until I started adding custom build tags like foo and foo357:

Code:
installed=$(ls /var/log/packages/$NAME-[[:digit:].]* | sed 's/^.*\(.\)$/\1/')

so if $build = 1foo357bar, then the above gives me "r"... The number I want will ALWAYS be after the last hyphen. There is a small chance that the number could reach double digits but it would be rare.

Any ideas? Thanks much for your help. I'm really stumped for some reason.
 

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LEARN ABOUT NETBSD

build-rdeps

BUILD-RDEPS(1)															    BUILD-RDEPS(1)

NAME

       build-rdeps - find packages that depend on a specific package to build (reverse build depends)

SYNOPSIS

       build-rdeps package

DESCRIPTION

       build-rdeps searches for all packages that build-depend on the specified package.

OPTIONS

       -u, --update
	   Run apt-get update before searching for build-depends.

       -s, --sudo
	   Use sudo when running apt-get update. Has no effect if -u is omitted.

       --distribution
	   Select another distribution, which is searched for build-depends.

       --only-main
	   Ignore contrib and non-free

       --exclude-component
	   Ignore the given component (e.g. main, contrib, non-free).

       --origin
	   Restrict the search to only the specified origin (such as "Debian").

       -m, --print-maintainer
	   Print the value of the maintainer field for each package.

       -d, --debug
	   Run the debug mode

       --help
	   Show the usage information.

       --version
	   Show the version information.

REQUIREMENTS

       The tool requires apt Sources files to be around for the checked components.  In the default case this means that in /var/lib/apt/lists
       files need to be around for main, contrib and non-free.

       In practice this means one needs to add one deb-src line for each component, e.g.

       deb-src http://<mirror>/debian <dist> main contrib non-free

       and run apt-get update afterwards or use the update option of this tool.

LICENSE

       This code is copyright by Patrick Schoenfeld <schoenfeld@debian.org>, all rights reserved.  This program comes with ABSOLUTELEY NO
       WARRANTY.  You are free to redistribute this code under the terms of the GNU General Public License, version 2 or later.

AUTHOR

       Patrick Schoenfeld <schoenfeld@debian.org>

Debian Utilities						    2013-12-23							    BUILD-RDEPS(1)
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