Hi all, i'm new here and to Unix and have a question about more help then I am getting. I live basically in Portland, OR and am attending college and have to take some Unix classes for my degree. Well class is fine and the help from the instructor is ok but I would like to receive more help then... (5 Replies)
i want to redirect output of one command as the command line argument of another script
for example, say i would run this command:
find . -xdev -type f -size +4096 -exec ls -al {} \;
i wan to be able to do something like:
echo +4096 | find . -xdev -type f -size ****** -exec... (3 Replies)
Can someone please help me with this SHELL script?
I need to create a script that gets a positive number n as an argument. The script must calculate the factorial of its argument. In other words, it must calculate n!=1x2x3x...xn. Note that 0!=1.
Here is a start but I have no clue how to... (3 Replies)
I have a flat file sample like this -
"COURSE"|"ddddd " " dddd"|"sssddd
sdsdsdsdx" dddddddd ffffff
"aaaaa" dddddddd ffffff
sdsdsd"|"xxxxxxx"|
"COURSE"|"ffff " " bbbb"|"lllll"|
The delimiter is pipe character (|) and the text are enclosed in double quotes... (5 Replies)
If ($argv == “-debug”) then
Echo “in loop”
Endif
But this is not working. If I modify this code and remove “-“, then it works.
Similarly I am getting problem using grep command also
Grep “-debug” Filename
Can someone please help me on how to resolve these... (1 Reply)
Hello,
Is there any method thorugh which script can take argument if pass otherwise if argument doesn't pass then it takes the argument from the configuration file
i.e I am workiing on a script which will run through crontab and the script will
chekout the code ,zip and copy to the... (3 Replies)
Hi All,
I am running the script
VBoxManage list vms |sed 's/"//g' | cut -d " " -f1 > har1out.mytxt
result=`cat har1out.mytxt | grep $1'
echo $result
echo $1
{
if
then
echo pass
else
echo fail
fi (2 Replies)
Hi guys,
I need to know how i can ignore Pipe '|' if Pipe is coming as a column in Pipe delimited file
for eg:
file 1:
xx|yy|"xyz|zzz"|zzz|12...
using below awk command
awk 'BEGIN {FS=OFS="|" } print $3
i would get xyz
But i want as :
xyz|zzz to consider as whole column... (13 Replies)
Discussion started by: rohit_shinez
13 Replies
LEARN ABOUT MOJAVE
io::pipe5.18
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)