hi all, i am quite new with Perl (just 1 week of experience) and i am suppose to understand the usage of library, which i can't, anyway...
i came across this library...i think from the linux redhat redhat.linux.lib.pl, there are a couple of functions there that can be used to retrieve information... (3 Replies)
Hello,
I have the following record in a text file, i would like modify some field:
1 - remove all space between ",", but the company name of word will not delete. Anyway, I can use the following statement to do it.
's/^ *//;s/ *, */,/g;s/ *$//' file
2. field #12, I need to modify to time... (11 Replies)
Hello,
Below is my input file's content ( in HP-UX platform ):
ABCD120672-B21 1
ABCD142257-002 1
ABCD142257-003 1
ABCD142257-006 1
From the above, I just want to get the field of 13 characters that comes after 'ABCD' i.e '120672-B21'... . Could... (2 Replies)
Dear all
I have the following problem that want to have your advices.
I want to capture the `ps auxwww | head -30` image with field separator (|) in my script
My expect output
USER PID %CPU %MEM SZ RSS TTY STAT STIME TIME COMMAND
root | 774 | 18.5 | 0.0 | 12 | 19716 | - |... (5 Replies)
:confused: I have a tab delimited file that I need to extract data from and into a file with specific field specs. Each field has to be a certain amount of characters. So, the name field (from delimited file) might have only 15 characters but needs to be 25 (in new file) so I need to insert spaces... (5 Replies)
I'm trying to update a text file via sed/awk, after a lot of searching I still can't find a code snippet that I can get to work.
Brief overview:
I have user input a line to a variable, I then find a specific value in this line 10th field in this case. After asking for new input and doing some... (14 Replies)
Hi Everyone,
New to the forum, and have my first question.
I have the following Macro currently being used within Telnet to run a report for the date being entered. However, now I need the Macro to input the day after today to the the day after today.
Example: If today is May 9, 2012 - the... (0 Replies)
Hello,
i need help with awk.
I have this file:
cat number
DirB port 67 er_enc_out 0 er_bad_os 0
DirB port 71 er_enc_out 56 er_bad_os 0
DirB port 74 er_enc_out 0 er_bad_os 0
DirB port 75 ... (4 Replies)
hi, i have a file A like this:
******************* No 2823 ********************
contig15205-
G383C4U02H4G80+ is in contig15205-
G383C4U02HGLXM- is in contig15205-
G383C4U01C3HIZ+ is in contig15205-
... (3 Replies)
In a particular directory, there can be 1000 files like below.
filename is job901.ksh
#!/bin/ksh
cront -x << EOJ
submit file=$PRODPATH/scripts/genReport.sh maxdelay=30
&node=xnode01
tname=job901
&pfile1=/prod/mldata/data/test1.dat
... (17 Replies)
Discussion started by: vedanta
17 Replies
LEARN ABOUT MOJAVE
io::pipe
IO::Pipe(3pm) Perl Programmers Reference Guide IO::Pipe(3pm)NAME
IO::Pipe - supply object methods for pipes
SYNOPSIS
use IO::Pipe;
$pipe = IO::Pipe->new();
if($pid = fork()) { # Parent
$pipe->reader();
while(<$pipe>) {
...
}
}
elsif(defined $pid) { # Child
$pipe->writer();
print $pipe ...
}
or
$pipe = IO::Pipe->new();
$pipe->reader(qw(ls -l));
while(<$pipe>) {
...
}
DESCRIPTION
"IO::Pipe" provides an interface to creating pipes between processes.
CONSTRUCTOR
new ( [READER, WRITER] )
Creates an "IO::Pipe", which is a reference to a newly created symbol (see the "Symbol" package). "IO::Pipe::new" optionally takes two
arguments, which should be objects blessed into "IO::Handle", or a subclass thereof. These two objects will be used for the system call
to "pipe". If no arguments are given then method "handles" is called on the new "IO::Pipe" object.
These two handles are held in the array part of the GLOB until either "reader" or "writer" is called.
METHODS
reader ([ARGS])
The object is re-blessed into a sub-class of "IO::Handle", and becomes a handle at the reading end of the pipe. If "ARGS" are given
then "fork" is called and "ARGS" are passed to exec.
writer ([ARGS])
The object is re-blessed into a sub-class of "IO::Handle", and becomes a handle at the writing end of the pipe. If "ARGS" are given
then "fork" is called and "ARGS" are passed to exec.
handles ()
This method is called during construction by "IO::Pipe::new" on the newly created "IO::Pipe" object. It returns an array of two objects
blessed into "IO::Pipe::End", or a subclass thereof.
SEE ALSO
IO::Handle
AUTHOR
Graham Barr. Currently maintained by the Perl Porters. Please report all bugs to <perlbug@perl.org>.
COPYRIGHT
Copyright (c) 1996-8 Graham Barr <gbarr@pobox.com>. All rights reserved. This program is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
perl v5.18.2 2013-11-04 IO::Pipe(3pm)