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Entries from August 2014

Sunday, August 17. 2014

Abandoned APT file finder

A few months back, when the Heartbleed bug bugged everyone, I tried to find the reason for one particular server still being vulnerable despite being updated. It turned out, that Apache loaded a manually installed SPDY library with statically linked OpenSSL library. After that incident I wanted to find all other files added to the system by hand.

I wrote this little script, and then I found a neat little debian package Cruft that performs exactly that task (written in shell, but ok).

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in Code, kurz notiert at 18:52 | Comments (0) | Trackbacks (0)

Tcl INI-Parser with Macros

You probably know the common ini file format with [sections] and key=value pairs, e.g.


[foo]
key1=value1
key2=value2
 

But sometimes, the ini file describes very similar sections, such as:


[host foo.example.com]
listen=foo.example.com:80
allow=10.0.0.0/8

[host bar.example.com]
listen=bar.example.com:80
allow=10.0.0.0/8

; many more here...
 

In order to eliminate this redundancy, qmon's ini-file parser defines macros inspired by C++ style #defines:


#template HOST %FQDN%
[host %FQDN%]
listen=%FQDN%:80
allow=10.0.0.0/8
#end template

#use HOST foo.example.com
#use HOST bar.example.com
 

This kind of macro preprocessor is used in the qmon monitoring system to simplify the task of configuring the same check over and over again for each host to be monitored.

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in Code at 17:39 | Comments (0) | Trackbacks (0)
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