Welcome to forums, kindly use code tags for commands/codes/Inputs used by you in the posts as per forum rules. Now for your requirement please do let us know the complete input and expected output for same, it will help us to advise you, based on some assumptions following you can take as a start up.
Lets say we have following input file.
Then following is the code for same, which may help.
Output will be as follows.
Thanks,
R. Singh
Hi
I need to search for matching strings in a database and I want to print out all files that matches in "detail", which means that I want the output to contain datum of last saving. I only get the grep function tp print the actual file names which is not enough since the database is to large... (14 Replies)
Hi everybody! :) :D :D :)
it's great to be here since this is my first post.
touch /base/oracle/FRA/XMUT00/RMAN_FLAG
touch /base/oracle/FRA/XRLL00/RMAN_FLAG
find directory name containing RMAN_FLAG :
$ find /base/oracle/FRA -name RMAN_FLAG -print|xargs -n1 dirname |sort -u... (3 Replies)
hi all,
for an example:
In a file out.txt contains:
/export/home/raghu/bin/debug_serverLog_apache_20090626_0625.txt
How to grep or cut the value as "debug_serverLog_apache_20090626_0625.txt"
or i want only the output as "debug_serverLog_apache_20090626_0625.txt"
pls advice me (3 Replies)
I have multiple systems with each having its own log directory containing log file pertinent to that system. I have constructed a find/grep statement to get the list of directories ending in log, but I can't seem to pipe that to grep (via xargs) to have grep search each file in the log directories... (8 Replies)
Hi,
I want to grep a string from the list of files present in a text file.
I want the output to be printed only when the string is present in a file along with the file name..
I tried some thing like
cat files_list | grep "search_string" $_
I know $_ is wrong but i want something... (7 Replies)
Hi,
My requirement is to copy all yesterdays files which have "access" keyword in their filenames to a separate folder say "/tmp/moht".
Can you please let me know how? (8 Replies)
Hi all,
it possible creating a file with list of directories, and using grep to find pattern on only directories and subdirectories contained in that file?
And it is done?
regards (4 Replies)
I have a script to create a variable from a list, B.txt and then search it in another file, file.txt and then print the pattern line and next line.
#!/bin/bash
while read a
do
echo "$a" | grep -A 1 $a file.txt > $a\.txt
done < B.txt
I always get that no such file or directory exists... (6 Replies)
Hi
I have below lists of files
filename-1.0.0.tar.gz
filename-1.0.1.345657676.snapshots.tar.gz
so when I do grep -o 'filename-*.tar.gz' | sort | tail -1
then it consider snapshots as a part of it's result.
How can I make sure, that it should only display the results from... (3 Replies)
Discussion started by: manas_ranjan
3 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)