Shell Programming:
Batch Files
_________________________________________________________
Guide to (mostly) Harmless Hacking
Vol. 5 Programmers' Series
No. 3: More on Advanced Unix Shell Programming
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by Meino Christian
Cramer <root@solfire.ludwigsburg.netsurf.de>
In this Guide you will discover examples of powerful batch
files
****************************************************
Want to get rolling
as a serious hacker? Try out these favorites from Meino
Christian Cramer. He uses them often, if something goes
wrong on his system, or if he wants to check some things...
He uses Linux, kernel version 2.1.102 (hacker kernel), but
the scripts are not that kernel relevant, so they should run
on every newer Linux system with bash shell installed.
You will find these
especially useful if you decide to learn
how to program in C -- that's in the next Programmer's Series
GTMHH!
If your favorite
shell isn't the bash shell, and these scripts won't run on your
shell, you have three choices:
1.) Install bash instead, learn to use it and forget your
current shell (OK, it is a little bit drastically...)
2.) Install the bash shell and change the first line of all
scripts from
#!/bin/sh
to
#!/<wherever
you have installed the bash>
3.) Change the syntax of the scripts from bash syntax to the
syntax of your favorite shell. This is not that hard, because
most of the work of the scripts is done by utilities and tools,
not by the scripts themselves.
First example:
---------------------------------------------------------------
(store this script as "llib")
#!/bin/sh
#
# This script shows you, which shared libraries are
# installed on your system and where to find them.
#
# usage: llib <part or the whole name of the library to find>
#################################################################
if [ -z $i ]
then
echo "usage: llib <part or the whole name of the library to find>"
exit
fi
echo "----------------------------------------------------------"
ldconfig -p | grep -i $1
echo "----------------------------------------------------------"
for i in $( ldconfig -p | grep -i $1 | gawk '{ print $4 }' )
do
ls "$i"*
done | sort -u
echo "----------------------------------------------------------"
This script is
tested with ldconfig version 1.9.6., GNU grep version 2.2, GNU
awk (gawk) version 3.03, sort version 1.14 and bash version 2.02.01.
But it should run also with older version of the utilities, except
of ldconfig, which may have no "-p" switch in older
versions.
More on shell batch files --->>
