I 'm trying to grep 2 fieldds on 2 differnt lines. Like this:
psit > file
egrep -e '(NS|ES)' $file. Not working. If this succeeds then run next cmd else exit. Pls Help
Gundu (13 Replies)
Hi.
I have this format on a textfile:
VG Name /dev/vg00
PV Name /dev/dsk/c16t0d0
PV Name /dev/dsk/c18t0d0
PV Name /dev/dsk/c16t4d0
VG Name /dev/vg01
PV Name ... (6 Replies)
I have setof files with data and with same fields multiple times in each of the files.
for example:
file 1
name = mary kate
last name = kate
address = 123
street = abc
name = mary mark
last name = mark
address = 456
street = bcd
file 2
name = mary kate
last name = kate... (2 Replies)
Sir
I have a data file e.g. DATA31082009. This file consists of several data files appended to that file. The size of each data file is different. The first line of each file starts with "44". I want to grep data from "44" to the preceding line of next "44" and save it as a individual file.... (10 Replies)
I want to search files (basically .cc files) in /xx folder and subfolders.
Those files (*.cc files) must contain #include "header.h" AND x() function.
I am writing it another way to make it clear,
I wanna list of *.cc files that have 'header.h' & 'x()'. They must have two strings, header.h... (2 Replies)
hi
i have kind of below text in a file.
I want to get a complete paragraph starting with START and ending with before another START) which has a particular string say XYZ or ABC
START XYZ hshjghkjh 45 ljkfd
fldjlj d jldf
START 3493u ABC 454
4545454
4545454 45454
4545454
START ...... (3 Replies)
How do you grep 'select * from table_name' string from a script if the select * and from table_name are on 2 different lines ? like
select *
from table_name
Any help would be greatly appreciated !!!
Thanks
RDR (4 Replies)
I want to grep multiple lines from a text file. I want to grep all lines containing X,Y and NA in a single command. How do I go about doing that?
This is what my text files look like:
rs1983866 0.0983 10 100016313
rs1983865 0.5994 X 100016339
rs1983864 0.3272 11 100017453
rs7077266... (2 Replies)
I would like to use grep to select multiple lines from a text file using a single-column text file. Basically I want to only select lines from the first text file where the second column of the first text file matches the second text file. How do I go about doing that? Thanks! (5 Replies)
GM,
I have an issue at work, which requires a simple solution. But, after multiple attempts, I have not been able to hit on the code needed.
I am assuming that sed, awk or even perl could do what I need.
I have an application that adds extra blank page feeds, for multiple reports, when... (7 Replies)
Discussion started by: jxfish2
7 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)