The way to do that is to create a list of files containing A1 and passing them to a grep that will look at only those files. To search for A3 the second grep would have to produce a list as well which you could save or pipe through.
The program xargs is very helpful for this in that it reads an input file or piped input, runs your command, and places every line of your input file as the last argument(s) of your command.
Code:
grep -l A1 {2nd parm for star name files if necessary} |tee my.list1
xargs <my.list1 grep -l A2 |xargs grep A3
If you will be doing a number of searches on files containing your first search term, creating a file with a list should be useful.
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)
hey guys,
Hey all,
I'm doing a project currently and want to index words in a webpage.
So there would be a file with webpage content and a file with list of words, I want an output file with true and false that would show which word exists in the webpage.
example:
Webpage content... (2 Replies)
Hi to all
Sorry for the confusion because I did not explain the task clearly.
There are many .hhr files in a folder
There are so many lines in these .hhr files but I want only the following 2 lines to be transferred to the output file.
The keyword No 1 and all the words in the next line
They... (5 Replies)
Hi
I am trying to determine number of lines having a specific keyword.
So for that I am using below query:
grep -i 'keyword1' filename|wc -l
This give me number of lines. Perfect for me.
However now the requirement is
I have multiple keywords together... and I have to find number of... (3 Replies)
Hi,
I have a file containing list of strings like
i:
Pink
Yellow
Green
and I have file having list of file names in a directory
j :
a
b
c
d
Where j contains of a ,b,c,d are as follows
a:
Pink (3 Replies)
Hi,
I want to grep multiple patterns from multiple files and save to multiple outputs. As of now its outputting all to the same file when I use this command.
Input : 108 files to check for 390 patterns to check for. output I need to 108 files with the searched patterns.
Xargs -I {} grep... (3 Replies)
I have below text file only with one line:
vi test.txt
This is the first test from a1.loa1 a1v1, b2.lob2, "c3.loc3" c3b1, loc4 but not from mot3 and second test from a5.loa5
Below should be the output that i want:
a1.loa1
b2.lob2
c3.loc3
loc4
a5.loa5
alv1 and c3b1 should be... (3 Replies)
The Problem that I am having is when the code ran and populated the progflag.csv file, columns MEMSIZE, SECOND and SASEXE were blank. The next problems are the IF else statement isn't working and the email function isn't sending the progflag.csv attachment.
a. What I want the program to do is to... (2 Replies)
I have several problems with my program: I hope you can help me.
1) the If else statement isn't working . The IF Else syntax is:
If MEMSIZE OR sasfoundation (SASEXE) OR Real Time(second) >1.0 and Filename, output column name and value to csv or else nothing
Example progflag,cvs:... (13 Replies)
Discussion started by: dellanicholson
13 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)