Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Perl Grep Error - Possible Syntax?
Top Forums Shell Programming and Scripting Perl Grep Error - Possible Syntax? Post 302403964 by adelsin on Monday 15th of March 2010 07:36:37 AM
Old 03-15-2010
Perl Grep Error - Possible Syntax?
Alrighty, I'm trying to get a perl script going to search through a bunch of files for me and compile it to a single location. I am currently having troubles on just getting the grep to work.

Here is what I currently have:
Code:
#!/usr/bin/perl
open (LOG, "errors.txt") or die
 ("Unable to open error.txt");
@errors=<LOG>;
close(LOG);
$errors2 = grep Error,@errors;
foreach ($errors2)
{
chomp($_);
print "$_";
print "\n";
}

Here is the current output:
Code:
$ ./perl.sh
7
$

Here is the contents of errors.txt
Code:
$ more errors.txt
Error1
Error2
Error3
Makeshift Error
Makeshift
Pluto
jerror

For some reason it's doing a line count. Which is my next thing I wanted to do with it. I want to line count the results to see to even write them, or just skip over writing that section of my perl script.

I'm not too sure if I'm making much sense right now, but I'm just trying re-relearn perl. More of a brush up.

I've tried:
Code:
 
open (LOG, "errors.txt") or die
 ("Unable to open error.txt");
@errors=<LOG>;
close(LOG);
$errors2 = `grep Error errors.txt`;
foreach ($errors2)
{
chomp($_);
print "$_";
print "\n";
}

Which works fine as well. Then when I try to line count $errors2, it wants to line count the file Error1, Error2, etc.

But when I try to
Code:
$errors2 = `grep Error @errors`;

it tries to grep for the word Error in file Error1,Error2,etc. So that doesn't work either.


Any chance another set of eyes could see what I am doing wrong? Thank you for your time. I greatly appriciate it.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Need help with the syntax using awk+grep

Hi, I need to extract information from a 4 GB file based on the following conditions: 1) Check for the presence of a set of account numbers Each account number is present along with other information within a PAGESTART and PAGEEND. The file looks like this: PAGESTART ACCOUNT NO 123... (6 Replies)
Discussion started by: kthri
6 Replies

2. Shell Programming and Scripting

grep syntax for this...

I wanna grep for a pattern logs 1 2 & 3 within a folder containing 100 logs grep "test" /folder/log1 /folder/log2 /folder/log3 The above command will work fine but is there any command like grep "test" /folder/log1, log2, log3 or something similar (4 Replies)
Discussion started by: roshanjain2
4 Replies

3. Shell Programming and Scripting

Perl Script Syntax error in version 4

Hi , I use the following simple perl script to find the yesterday time perl -e ' use POSIX(strftime); print POSIX::strftime("%a %b %e %H:%M:%S %Y", localtime(time-86400*$ARGV))' 1 However in the perl version 4 , it gives me the following error : Do the perl version 4 does not support... (4 Replies)
Discussion started by: youareapkman
4 Replies

4. BSD

proper syntax of grep command

I'm learning UNIX on my mac (BSD), using a manual. I'm trying to figure out the grep command, and am getting something wrong. I've opened one of my files in NeoOffice and am looking for a string, the phrase 'I am writing.' I've been to some sites to get the proper syntax, and from what I can see... (5 Replies)
Discussion started by: Straitsfan
5 Replies

5. UNIX for Dummies Questions & Answers

| help | unix | grep (GNU grep) 2.5.1 | advanced regex syntax

Hello, I'm working on unix with grep (GNU grep) 2.5.1. I'm going through some of the newer regex syntax using Regular Expression Reference - Advanced Syntax a guide. ls -aLl /bin | grep "\(x\)" Which works, just highlights 'x' where ever, when ever. I'm trying to to get (?:) to work but... (4 Replies)
Discussion started by: MykC
4 Replies

6. UNIX for Dummies Questions & Answers

Find/Grep Syntax Question

Hi Folks, I am trying to dig through about 100 directories that have 1 or 2 .jpg images stored in each. I want to copy the .jpg to another file in the root directory. Really my ultimate goal is not to have to dig down into each directory to copy the images individually. I thought I could use a... (2 Replies)
Discussion started by: alpinescott
2 Replies

7. Shell Programming and Scripting

Grep syntax print after certain character

My current code is: user@ubuntu:~/Desktop$ grep -e "\(packaged by\)\|\(employee\)\|\(file name\)\|\(Total Data (MB) Read\)\|\(Begin Time\)" log.txt packaged by = Ron Mexico employee = Michael Vick file name = Mike_Vick_2011.bat Total Data (MB) Read: 11.82 Begin Time: 6/13/2011... (8 Replies)
Discussion started by: chipperuga
8 Replies

8. Programming

Syntax error in perl program.

Hi, i am running this code but i am getting syntax error #!/usr/bin/perl use warnings; use strict; use XML::LibXML; use XML::LibXML::Reader; use Data::Dumper; my $file; open( $file, 'DTC_Specification_transformed.xml'); my $reader = XML::LibXML::Reader->new( IO => $file ) or die... (1 Reply)
Discussion started by: veerubiji
1 Replies

9. Shell Programming and Scripting

Help on grep syntax in UNIX

Dear Team /app/Appln/logs/ echo Session used server are 'grep -i pid|grep -i session | cut -d'.' -f1 | awk '{print $9}' | sort | uniq' Output - lxserver01 lxserver02 lxserver03 When I grep session pid in logs server details I can see above distinct server details but I... (6 Replies)
Discussion started by: skp
6 Replies

10. UNIX for Beginners Questions & Answers

FIND and GREP syntax

I have a question to this command find . -type f -name ".*txt" -exec grep "text" {}\. The find command will locate a file name with the extension of txt once per round and find the word "text" in the content of the file or the find command will locate all the file names with the extension of... (2 Replies)
Discussion started by: TestKing
2 Replies

LEARN ABOUT DEBIAN

cg

CG(1)																	     CG(1)

NAME

       cg - Recursively grep for a pattern and store it.

SYNOPSIS

       cg [ -l ] | [ [ -i ] pattern [ files ] ]

DESCRIPTION

       cg  does  a search though text files (usually source code) recursively for a pattern, storing matches and displaying the output in a human-
       readable fashion.  It is intended to give some of the functionaly of AT&T's cscope(1) tool, with the advantages of simplicity and not being
       language-specific.  The script will colorize output if configured as such.

       It  is typically run with a Perl regular expression to search for.  The search can be made case insensitive by using the -i option.  A list
       of files may also be specified with an additional argument after the pattern.  Put the files pattern in quotes to make  it  be  matched	by
       Perl  rather  than  by  the shell.  Running the script with no arguments will recall the results of the previous search.  After the search,
       entries found can be edited using the vg(1) script.  The -l option shows the last log made.

SOME EXAMPLES

       cg - alone recalls the previous search results.

       cg -i pattern - search the default list of files for all files matching the pattern (and case-insensitively).

       cg pattern '*.c' - search recursively for pattern in all *.c files.  This automatically converts '*' to '.*' and '.' to '.'  for  you  and
       does a Perl pattern match on all files in the tree.

       cg  pattern  *.c  - search through the shell-expanded list of *.c files, so not done recursively (in other words, only the files your shell
       pass to the script as arguments).

       cg -l - show the last log made.

COMMAND-LINE OPTIONS
       -i   Do a case-insensitive search.

       -l   Show the last log made.

       -p   Toggle the default pager option.  cg has a bulit-in pager function, which can be enabled or disabled by default (in .cgvgrc).  If  the
	    default is enabled, this option disables the pager; if the default is disabled, this option enables it.

       -P   Force the built-in pager to be disabled.

FILES

       ${HOME}/.cglast
	      Log file of the last search.

       ${HOME}/.cgvgrc
	      Per-user configuration file (if the defaults are not desireable).

       ${HOME}/.cgvg/*
	      Log files in $HOSTNAME.shell_pid form with the log of the last search.

SEE ALSO

       vg(1), perl(1), find(1), grep(1), cscope(1)

AUTHOR

       cg was written by Joshua Uziel <uzi@uzix.org>.

								    13 Mar 2002 							     CG(1)
All times are GMT -4. The time now is 03:15 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy