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)
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)
Hi Guys,
I need to set the value of $7 to zero in case $7 is NULL. I've tried the below command but doesn't work. Any ideas. thanks guys.
MEM=`ps v $PPID| grep -i db2 | grep -v grep| awk '{ if ( $7 ~ " " ) { print 0 } else { print $7}}' `
Harby. (4 Replies)
Hi,
I am writing a Perl script that reads in many lines, if a line meets the criteria I want to edit, it. For example, the script will return the following example line... test=abc123
All I want to do is strip off the "test=" and just be left with the abc123. In my script I can easily... (3 Replies)
I must admit I am relativly new to sed, and I am trying to make a simple sed query to search log files and return multiple variables from multiple logs. So far I have had success, but one problem remains:
Alot of lines in the log files wrap onto multiple lines and are not being returned as... (2 Replies)
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)
hello all
i request you to give the solution for the following problem..
I want read the text file.and print the contents character by character..like if the text file contains google means..i want to print
g
go
goo
goog
googl
google
like this Using unix Shell scripting...
without using... (1 Reply)
I'm trying to output the contents of the infile to the outfile using Append.
I will want to use append but the syntax doesn't seem to be working !
Input file (called a.txt) contains this:
a
a
a
b
b
b
I'm running shell script (called k.sh) from Unix command-line like this:
./k.sh .... (1 Reply)
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)
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
poe::filter::grep
POE::Filter::Grep(3pm) User Contributed Perl Documentation POE::Filter::Grep(3pm)NAME
POE::Filter::Grep - select or remove items based on simple rules
SYNOPSIS
#!perl
use POE qw(
Wheel::FollowTail
Filter::Line Filter::Grep Filter::Stackable
);
POE::Session->create(
inline_states => {
_start => sub {
my $parse_input_as_lines = POE::Filter::Line->new();
my $select_sudo_log_lines = POE::Filter::Grep->new(
Put => sub { 1 },
Get => sub {
my $input = shift;
return $input =~ /sudo[d+]/i;
},
);
my $filter_stack = POE::Filter::Stackable->new(
Filters => [
$parse_input_as_lines, # first on get, last on put
$select_sudo_log_lines, # first on put, last on get
]
);
$_[HEAP]{tailor} = POE::Wheel::FollowTail->new(
Filename => "/var/log/system.log",
InputEvent => "got_log_line",
Filter => $filter_stack,
);
},
got_log_line => sub {
print "Log: $_[ARG0]
";
}
}
);
POE::Kernel->run();
exit;
DESCRIPTION
POE::Filter::Grep selects or removes items based on simple tests. It may be used to filter input, output, or both. This filter is named
and modeled after Perl's built-in grep() function.
POE::Filter::Grep is designed to be combined with other filters through POE::Filter::Stackable. In the "SYNOPSIS" example, a filter stack
is created to parse logs as lines and remove all entries that don't pertain to a sudo process. (Or if your glass is half full, the stack
only selects entries that DO mention sudo.)
PUBLIC FILTER METHODS
In addition to the usual POE::Filter methods, POE::Filter::Grep also supports the following.
new
new() constructs a new POE::Filter::Grep object. It must either be called with a single Code parameter, or both a Put and a Get parameter.
The values for Code, Put, and Get are code references that, when invoked, return true to select an item or false to reject it. A Code
function will be used for both input and output, while Get and Put functions allow input and output to be filtered in different ways. The
item in question will be passed as the function's sole parameter.
sub reject_bidoofs {
my $pokemon = shift;
return 1 if $pokemon ne "bidoof";
return;
}
my $gotta_catch_nearly_all = POE::Filter::Grep->new(
Code => &reject_bidoofs,
);
Enforce read-only behavior:
my $read_only = POE::Filter::Grep->new(
Get => sub { 1 },
Put => sub { 0 },
);
modify
modify() changes a POE::Filter::Grep object's behavior at run-time. It accepts the same parameters as new(), and it replaces the existing
tests with new ones.
# Don't give away our Dialgas.
$gotta_catch_nearly_all->modify(
Get => sub { 1 },
Put => sub { return shift() ne "dialga" },
);
SEE ALSO
POE::Filter for more information about filters in general.
POE::Filter::Stackable for more details on stacking filters.
BUGS
None known.
AUTHORS & COPYRIGHTS
The Grep filter was contributed by Dieter Pearcey. Documentation is provided by Rocco Caputo.
Please see the POE manpage for more information about authors and contributors.
perl v5.14.2 2012-05-15 POE::Filter::Grep(3pm)