03-05-2009
1. There will be a blank carriage return inbetween the paragraphs.
2. The NAME (in the first one) matches Service (in the second)
Thanks for your quick response.
9 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I am a beginner at shell scripting, actually i am working on my first script right now.
Anyway i have searched the world how to grep two letters from each word (it will always just be two words).
For example:
Example Blablabla
I want my script to cut out Ex (from the first word) and Bl... (4 Replies)
Discussion started by: maskot
4 Replies
2. Shell Programming and Scripting
Hi
Is there a way to cut the last two characters off a word or number given that this word or number can be of varying length?
I have tried something like
TEST=`echo $OLD | cut -c 1-5`
where $OLD is a variable containing a number like 1234567 which gives a result of 12345. This is fine... (4 Replies)
Discussion started by: rleebife
4 Replies
3. Shell Programming and Scripting
Hi
Can i have an example where i should be able to cut columns
(like for eg cut -c 1-3) in sed or awk.
Regards
Dhana (12 Replies)
Discussion started by: dhanamurthy
12 Replies
4. UNIX for Dummies Questions & Answers
Hi,
From the file "example" with lines like below, I need the int value associated with ENG , i.e, 123
SUB: ENG123, GROUP 1
SUB: HIS124, GROUP 1
..
..
Normally , i do
grep ENG example | cut -d ' ' -f 2 | cut -c 4-6
Is it possible to do it in simpler way using awk/sed ?
... (5 Replies)
Discussion started by: priyam
5 Replies
5. Shell Programming and Scripting
Hi
My input file looks like as follows: say a.txt
"aaaa cc","224 AW","ss cccccc","P06 09/10","dddddd"
"aaaa cc","224 AW","ss cccccc","P06 09/10","dddddd"
"aaaa cc","224 AW","ss cccccc","P06 09/10","dddddd"
"aaaa cc","224 AW","ss cccccc","P06 09/10","dddddd"
"aaaa cc","224 AW","ss... (5 Replies)
Discussion started by: bittoo
5 Replies
6. Shell Programming and Scripting
Hi,
I am cutting data from a fixed length test file and then writing out a new record using the echo command, the problem I have is how to stop multiple spaces from being written to the output file as a single space.
Example:
cat filea | while read line
do
field1=`echo $line | cut -c1-2`
... (6 Replies)
Discussion started by: dc18
6 Replies
7. Shell Programming and Scripting
hi people,
I have a text file containing data, seperated by TAB. I want to process this tab'ed data as variable. how can I assign this?
Ex:
Code:
11aaa 12000 13aaa 14aaa 15aaa 16aaa 17aaa
21aaa 22000 23aaa 24aaa 25aaa 26aaa 27aaa
31aaa 32000 33aaa 34aaa 35aaa 36aaa 37aaa... (1 Reply)
Discussion started by: gc_sw
1 Replies
8. Shell Programming and Scripting
I have a file and need to only select users that have a shell of “/bin/bash” in the line using awk or sed please help (4 Replies)
Discussion started by: boyboy1212
4 Replies
9. UNIX for Dummies Questions & Answers
I have this filename "RBD_EXTRACT_a3468_d20131118.tar.gz" and I would like print out the "yyyymmdd" only. I use this command below, but if different command like cut or print....etc. Thanks
ls RBD_EXTRACT* | sed 's/.*\(........\).tar.gz$/\1/' > test.txt (9 Replies)
Discussion started by: dotran
9 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)