09-18-2009
Finding missing files that are named sequentially with Perl?
Thank you radoulov ... your code was exactly what I needed.
This will make life easier while I learn Perl.
10 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
Hi Gurus,
i have to transfer files one by one from ftp server to target server
all files which is to be transferred lies in one ftp folder
i have to move those files sequentially from ftp to target and must verify files for successful transmission .
then i have to delete corresponding... (1 Reply)
Discussion started by: harim
1 Replies
2. Shell Programming and Scripting
I have an application consisting of a number of perl files. I want to find those perl files that have no documentation yet, so I tried the following from the root level of the directory where the application resides:
perldoc -r *
The output is something like the following:
No documentation found... (2 Replies)
Discussion started by: figaro
2 Replies
3. Shell Programming and Scripting
I have a list containing strings. All strings should have either "smp" or "drw" else it is considered an error. I have written this code below. Any better ideas to tackle this?
set fdrw = 0
set fsmp = 0
foreach f ($Lst)
set fdrwtag = `echo $f | awk '/drw/'`
set fsmptag = `echo $f | awk... (1 Reply)
Discussion started by: kristinu
1 Replies
4. Shell Programming and Scripting
I have got an Perl array like:
@array = (1,2,3,4,5,6,1,2,3,4,1,2,1,2,3,4,5,6,7,8,9...............)
This numeric sequence will be always sequentially increasing, unless it encounters, The beginning of the new sequentially increasing numeric sequence.
SO in this array we get sequentially... (5 Replies)
Discussion started by: teknokid1
5 Replies
5. Red Hat
hello everyone,
I have install centos 5 recently.The file /etc/named.conf not found. I have installed BIND using yum. so now what to do ?? should i create named.conf file manually ???
please help me.
thanks,
sharlin. :) (1 Reply)
Discussion started by: sharlin
1 Replies
6. Shell Programming and Scripting
I would really appreciate any assistance that I can get here.
I am fairly new to perl. I am trying to rewrite my shell scripts to perl.
Currently I have a shell script (using sed, awk, grep, etc) that gets a list of all of the zone files in a directory and then looks in named.conf for what... (0 Replies)
Discussion started by: brianjb
0 Replies
7. Shell Programming and Scripting
Hello, I am a very novice user of awk, I have a set of files named file001, file002, file003, file004, etc., each contains four fields (columns of data) separated each by a uneven number of spaces. I want to substitute those spaces by a TAB, so I am using this line of awk script:
awk -v OFS="\t"... (4 Replies)
Discussion started by: jaldo0805
4 Replies
8. Shell Programming and Scripting
Dear Help,
I have an input file which looks like below
002 1000 2000 3000
003 2000 3000 4000
005 1000 2000 6000
I would like to have an output which inserts the missing number in sequential sorting as shown below...
001 0 0 0
002 1000 2000 3000
003 2000 3000 4000
004 0 0 0
005 1000... (5 Replies)
Discussion started by: Indra2011
5 Replies
9. Shell Programming and Scripting
Hello team,
We wish to develop a script as follows :
1. Rename multiple files in the following way:
example
Original file names : test.txt and dummy.txt
New file names : test.$(date +"%F").AAAAA<serialno_1>.BBBBBB.p and dummy.$(date +"%F").AAAAA<serialno_2>.BBBBBB.p
2. The... (3 Replies)
Discussion started by: H squared
3 Replies
10. UNIX for Beginners Questions & Answers
Greetings!
Been a while since I futzed around with Perl, and came upon a minor headscratcher for the community ;)
Here's the basic code which I'm trying to make tick over:#!/usr/bin/perl
use strict;
use warnings;
use diagnostics;
print " starting ";
while (-e "~/.somedir/testFile")... (9 Replies)
Discussion started by: LinQ
9 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)