Does anyone know how to use grep/egrep to find a string that contains a null character?
i.e.: the string looks like this: null0001nullN
well I want to be able to : grep '0001N'
is there a wildcard character or something that I can put in the grep to include the nulls? (3 Replies)
hi,
I have few text templates
as a simple ex:
template 1
city Name:
zip code:
state Name:
template2:
employee Name:
Phone number:
I wish to grep on given text file and make sure the text file matches one of these templates. Please give your ideas. (6 Replies)
Hi,
I am trying to display the filename in which a string was found after using find and grep. For this after some googling I found that this works:
find -name "*.java" -exec grep "searchStr" {} /dev/null \;
I wanted to know the difference between the above and the following:
find -name... (0 Replies)
Hi frnds
i want to desplay file names that should be word1 and word2
ex :
i have 10 *.log files
5 files having word1 and word2
5 files having only word1,
i have used below command
egrep -l 'word1|word2' *.log
its giving all 10 files, but i want to display only 5... (20 Replies)
Hi..
How to search for multiple words in a single line using grep?.
Eg: Jack and Jill went up the hill
Jack and Jill were best friends
Humpty and Dumpty were good friends too
----------
I want to extract the 2nd statement(assuming there are several statements with... (11 Replies)
Hello All,
I'm a newbie/rookie in Shell scipting. I've done oracle export of a table using Export utility. When I do export, it generates 2 files.
1> .dmp file
2> .dmp.log file.
In .dmp.log file I have to search for a sentence which goes like '0 records have been inserted' and then... (2 Replies)
Hello.
From command line, the command zypper info nxclient
return a bloc of data :
linux local # zypper info nxclient
Loading repository data...
Reading installed packages...
Information for package nxclient:
Repository: zypper_local
Name: nxclient
Version: 3.5.0-7
Arch: x86_64... (7 Replies)
Hi guys and gals,
I have many files that contains many lines of data. I am trying to find a needle in a haystack in that I'm looking only for files that contain word1 AND word2.
I'm using ...
...
but this is finding files that contains word1 OR word2. No good for me. How can I grep to... (7 Replies)
I have 4000 files like
$cat clus_grp_seq10_g.phy
18 1002
anig_OJJ65951_1 ATGGTTTCGCAGCGTGATAGAGAATTGTTTAGGGATGATATTCGCTCGCGAGGAACGAAGCTCAATGCTGCCGAGCGCGAGAGTCTGCTAAGGCCATATCTGCCAGATCCGTCTGACCTTCCACGCAGGCCACTTCAGCGGCGCAAGAAGGTTCCTCG
aver_OOF92921_1 ... (1 Reply)
I have multiple strings in a file which have special character $, when i search strings by ignoring $ with \ using single quotes it returns empty results.
My search strings are set char_1($lock) and set new_char_clear_3($unlock)
I tried searching with
but it returns empty results.However... (3 Replies)
Discussion started by: g_eashwar
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)