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Top Forums Shell Programming and Scripting Search for patterns in thousands of files Post 302785631 by danish0909 on Tuesday 26th of March 2013 04:52:31 AM
Old 03-26-2013
Search for patterns in thousands of files

Hi All,


I want to search for a certain string in thousands of files and these files are distributed over different directories created daily. For that I created a small script in bash but while running it I am getting the below error:

/ms.sh: xrealloc: subst.c:5173: cannot allocate 268435456 bytes (536977408 bytes allocated)

Pasting the code that I wrote:

Code:
#!/usr/local/bin/bash

for i in `cat msisdn_u.txt`
do

cd /comptel4/elink/backup1/output/vas/NG0/20130301
find ./*GPX.Z|xargs zcat|grep $i; cd ..
cd /comptel4/elink/backup1/output/vas/NG0/20130302
find ./*GPX.Z|xargs zcat|grep $i; cd ..
cd /comptel4/elink/backup1/output/vas/NG0/20130303
find ./*GPX.Z|xargs zcat|grep $i; cd ..
cd /comptel4/elink/backup1/output/vas/NG0/20130304
find ./*GPX.Z|xargs zcat|grep $i; cd ..
cd /comptel4/elink/backup1/output/vas/NG0/20130305
find ./*GPX.Z|xargs zcat|grep $i; cd ..
cd /comptel4/elink/backup1/output/vas/NG0/20130306
find ./*GPX.Z|xargs zcat|grep $i; cd ..
cd /comptel4/elink/backup1/output/vas/NG0/20130307
find ./*GPX.Z|xargs zcat|grep $i; cd ..
..
..
..
done

This is in the patterns file:

Code:
more msisdn_u.txt
0564891888
0500555401
0563433343
0561132174
0562714661
0543210172
0503588147
0541400224
0564445889
0544998887
0564543055
0544095240
0563211334

Please advise as I need to find out and report it to the management.

Thanks

Danish

Last edited by radoulov; 03-26-2013 at 08:21 AM..
 

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ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME
zgrep - search possibly compressed files for a regular expression SYNOPSIS
zgrep [ grep_options ] [ -e ] pattern filename... DESCRIPTION
Zgrep invokes grep on compressed or gzipped files. These grep options will cause zgrep to terminate with an error code: (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*). All other options specified are passed directly to grep. If no file is specified, then the standard input is decompressed if necessary and fed to grep. Otherwise the given files are uncompressed if necessary and fed to grep. If the GREP environment variable is set, zgrep uses it as the grep program to be invoked. EXIT CODE
2 - An option that is not supported was specified. AUTHOR
Charles Levert (charles@comm.polymtl.ca) SEE ALSO
grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1) ZGREP(1)
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