Hi,
Let say I have these 3 files (state, list and myscript). I want to be able get the sample output like below when I run myscript. Any one know how to fix the code? TIA.
~~~~~~~~~~~~~~~
If your grep allows the -f flag, then you could do this
With cut -c 8-13 myfile,
I am getting some numeric value.
In my shell script I am trying to assign something like this,
var=cut -c 8-13 myfile
But at the time of execution I am getting -c is not found.
If I dont assign, then script executes well.
Can we not simply use the value from one... (8 Replies)
Hi,
How do I store following command output:
export RESULT=`date` &
It works when I do :
export RESULT=`date`
But what I need is when command put it background, I also need that output going to RESULT variable.
Is there any way ?
Thanks
Sanjay (1 Reply)
Hi,
i have two questions, I am new to programming
1. I have an output of a command and i want to get some specific part of it in a variable. i am trying
sr=`some comand xyz| grep 'Last Changed Rev:' | cut -c19-`
now variable sr gets a end of line character at end.
output of the command... (3 Replies)
Hi, with this command:
cu -l /dev/ttyACM0 -s 9600 > name.txt
I put the output of the port in a txt
Is posible to do the same (or similar) in a var directly, inside a C program?
cu -l /dev/ttyACM0 -s 9600 > variable ?
I have trying this withs pipes, but i dont know how to... (6 Replies)
I'm hoping you guys can help me out here. I've been trying different methods to try and get what IW as hoping would be a fairly simple script but has turned into a pain.
Bit of background - I am writing a script to check values in certain failes to ensure they are corerct. I'm runnign this on... (2 Replies)
Hi,
in shell script, i have the command swstart -p which returns an output. i want to store the output of this command into a variable. how i can do that
excerpt from the script
#!/usr/bin/ksh
#
#
#
# Program: swstart -p
#
# Description: Starts the sentinels on Slave server
... (4 Replies)
I'm working on a short BASH script on my Ubuntu box that will run powerpoint scripts with MS Powerpoint Viewer 2007 via WINE.
I can run the presentation when I run it manually but what i'd like to do is have the script look for the newest file then run it.
#! /bin/sh
# Start the newest... (2 Replies)
#!/bin/bash
#...
for i in `ls -c1 /usr/share/applications`
do
name="cat $i | grep ^Name= | cut -d = -f2"
echo $name
#...
done
Now inside name as output is present:
while i want only the result of the command.
Ideally i would like obtain that information using only bash ... or... (8 Replies)
I have the following script used, i am new to shell scripting. tryign to understand.
in the put $BASE_FOLDER/$base_name holds which path.
What does it mean by $1
second path in put command is it constructing this path: /user/hive/warehouse/stage.db/$1
what is $1 holding in above path.
... (2 Replies)
Discussion started by: cplusplus1
2 Replies
LEARN ABOUT REDHAT
filter::decrypt
decrypt(3) User Contributed Perl Documentation decrypt(3)NAME
Filter::decrypt - template for a decrypt source filter
SYNOPSIS
use Filter::decrypt ;
DESCRIPTION
This is a sample decrypting source filter.
Although this is a fully functional source filter and it does implement a very simple decrypt algorithm, it is not intended to be used as
it is supplied. Consider it to be a template which you can combine with a proper decryption algorithm to develop your own decryption fil-
ter.
WARNING
It is important to note that a decryption filter can never provide complete security against attack. At some point the parser within Perl
needs to be able to scan the original decrypted source. That means that at some stage fragments of the source will exist in a memory buf-
fer.
Also, with the introduction of the Perl Compiler backend modules, and the B::Deparse module in particular, using a Source Filter to hide
source code is becoming an increasingly futile exercise.
The best you can hope to achieve by decrypting your Perl source using a source filter is to make it unavailable to the casual user.
Given that proviso, there are a number of things you can do to make life more difficult for the prospective cracker.
1. Strip the Perl binary to remove all symbols.
2. Build the decrypt extension using static linking. If the extension is provided as a dynamic module, there is nothing to stop someone
from linking it at run time with a modified Perl binary.
3. Do not build Perl with "-DDEBUGGING". If you do then your source can be retrieved with the "-Dp" command line option.
The sample filter contains logic to detect the "DEBUGGING" option.
4. Do not build Perl with C debugging support enabled.
5. Do not implement the decryption filter as a sub-process (like the cpp source filter). It is possible to peek into the pipe that con-
nects to the sub-process.
6. Check that the Perl Compiler isn't being used.
There is code in the BOOT: section of decrypt.xs that shows how to detect the presence of the Compiler. Make sure you include it in
your module.
Assuming you haven't taken any steps to spot when the compiler is in use and you have an encrypted Perl script called "myscript.pl",
you can get access the source code inside it using the perl Compiler backend, like this
perl -MO=Deparse myscript.pl
Note that even if you have included the BOOT: test, it is still possible to use the Deparse module to get the source code for individ-
ual subroutines.
7. Do not use the decrypt filter as-is. The algorithm used in this filter has been purposefully left simple.
If you feel that the source filtering mechanism is not secure enough you could try using the unexec/undump method. See the Perl FAQ for
further details.
AUTHOR
Paul Marquess
DATE
19th December 1995
perl v5.8.0 2003-01-27 decrypt(3)