Oops inc.

apt-cache depends and rdepends

oopsinc — Mon, 01 Mar 2010 23:21:55 +0000

$ apt-cache depends git-svn git-svn Depends: git-core Depends: git-core |Depends: libsvn-perl Depends: libsvn-perl Depends: libwww-perl Depends: libterm-readkey-perl Suggests: git-doc Suggests: subversion Replaces:
$ apt-cache rdepends git-svn git-svn Reverse Depends: moap git-doc git-core

get soname from library

oopsinc — Wed, 10 Feb 2010 13:48:54 +0000

Nice trick found in debian packaging tools:

$ objdump -p /lib/libc.so.6 | sed -n -e's/^[[:space:]]*SONAME[[:space:]]*//p' | sed -e's/$[0-9]$\.so\./\1-/; s/\.so\.//' libc6

view binary files

oopsinc — Tue, 09 Feb 2010 19:13:24 +0000

Lets assume you have some mysterious binary x file. A few tips to quickly look around what inside it:

cat x | od -xa
cat x | xxd
cat x | strings

crosscompiling on debian

oopsinc — Fri, 29 Jan 2010 17:20:33 +0000

http://psas.pdx.edu/DebianCrossCompilerHowto/

dynamic libraries on linux

oopsinc — Fri, 29 Jan 2010 16:35:51 +0000

Recently there was interesting thread on dynamic kernel libraries in linux. I found a few links from this discussion interesting.

http://www.iecc.com/linker/
http://www.linuxjournal.com/article/6463
Linkers & Loaders
understanding elf using readelf and objdump
executable and linkable format
notes on elf file format

irc client for ubuntu

oopsinc — Fri, 29 Jan 2010 16:06:20 +0000

Quick irc intro for ubuntu users https://help.ubuntu.com/community/InternetRelayChat.

skip broken commits with git-bisect

oopsinc — Sat, 23 Jan 2010 12:23:51 +0000

This was found somewhere on LKML.

You can do “git bisect skip” to make git know that some particular commit
is not a commit you can test, and you can also move away from a whole
problematic region to another area by doing

git bisect visualize

to bring up a graphical gitk view of what all you have left to bisect,
pick a good point (still reasonably close to the middle) there, and do

git reset --hard

and try that kernel instead of the one git bisect suggested.