I'm writing a bash script, and I was wondering what proper programming etiquette was for piping. How many pipes is too many pipes?
My next step would be to tar those directories, then move them. I'm not asking if it's a matter of CAN I pipe it all, but SHOULD I pipe it all. As its proper to indent while in a loop, is there a unanimous rule for amount of pipes?
I'm a frequent visitor to these forums. I generally enjoy topics that are posted as well as the responses. I really pickup a lot of new things to learn.
However, there is one thing that does bother me here. (I dont mean to start a flame war, or any problems at all, just expressing some... (8 Replies)
I have a series of new machines that are internet facing (have IP's that are accessible via the 'net) and it has internal facing interfaces. I need to be able to communicate back to the internal network to a specific server which processes monitoring and e-mail traffic. I've been told that I should... (3 Replies)
My goal was to find any directories inside of any directory called "09_Client Original" not modified in the last 30 days.
$ find /Volumes/Jobs_Volume/ -type d -name "09_Client Original" -exec find {} -mtime +30 -type d -maxdepth 1 \;
The results of this find are passed along in a perl script... (1 Reply)
foll. is my code snippet.
#!/bin/ksh
retVal=`sqlplus -s user/passwd@oracle_sid <<EOF
SET SERVEROUTPUT ON SIZE 100000
DECLARE
STATUS_VALUE CHAR;
BEGIN
SELECT temp1 INTO STATUS_VALUE FROM sai;
DBMS_OUTPUT.PUT_LINE(STATUS_VALUE);
END;
/
SET... (1 Reply)
Hi,
Below is my script which creates a file:
#!/bin/sh
if
then
echo "Enter bill period "
echo "Syntax: sh cpd.sh G08"
exit
fi
sqlplus uname/pwd@dbname <<EOF
set WRAP off
set FEEDBACK off
set PAGESIZE 0
set VERIFY off (14 Replies)
I'm learning UNIX on my mac (BSD), using a manual. I'm trying to figure out the grep command, and am getting something wrong. I've opened one of my files in NeoOffice and am looking for a string, the phrase 'I am writing.' I've been to some sites to get the proper syntax, and from what I can see... (5 Replies)
I have written a Bash Script that captures video via the Linux application DVgrab. When run my script prompts the terminal user to enter all the necessary information for the capture, save location, file name, file type capture duration etc...
These are all in the form of
#!/bin/bash
echo... (5 Replies)
Hello,
On a linux server (centos 5.4), users upload file that should be flv. How can I check that the file is a real and proper flv file? Checking the extension is not enough!
Thanks (1 Reply)
Recently i started to work in new company. I will replace old admin who is going into retirement and he has been showing me his procedures for server, database and network administration.
From first point of view: there is absolutely no configuration management involved how they deploy software... (0 Replies)
Hey guys, not sure should I post it here or in 'What is on Your Mind?'
I'm discussing usage of DSL (domain specific language) in security tools with my colleagues. We haven't been able to reach an agreement over naming conventions.
There are many tools using DSL: splunk, sumologic,... (2 Replies)
Discussion started by: Tobby P
2 Replies
LEARN ABOUT DEBIAN
poe::pipe::oneway
POE::Pipe::OneWay(3pm) User Contributed Perl Documentation POE::Pipe::OneWay(3pm)NAME
POE::Pipe::OneWay - a portable API for one-way pipes
SYNOPSIS
my ($read, $write) = POE::Pipe::OneWay->new();
die "couldn't create a pipe: $!" unless defined $read;
DESCRIPTION
The right way to create an anonymous pipe varies from one operating system to the next. Some operating systems support "pipe()". Others
require "socketpair()". And a few operating systems support neither, so a plain old socket must be created.
POE::Pipe::OneWay will attempt to create a unidirectional pipe using "pipe()", "socketpair()", and IO::Socket::INET, in that order.
Exceptions are hardcoded for operating systems with broken or nonstandard behaviors.
The upshot of all this is that an application can portably create a one-way pipe by instantiating POE::Pipe::OneWay. The work of deciding
how to create the pipe and opening the handles will be taken care of internally.
POE::Pipe::OneWay may be used outside of POE, as it doesn't use POE internally.
PUBLIC METHODS
new [TYPE]
Create a new one-way pipe, optionally constraining it to a particular TYPE of pipe. One-way pipes have two ends: a "read" end and a
"write" end. On success, new() returns two handles: one for the "read" end and one for the "write" end. Returns nothing on failure, and
sets $! to explain why the constructor failed.
my ($read, $write) = POE::Pipe::OneWay->new();
die $! unless defined $read;
TYPE may be one of "pipe", "socketpair", or "inet". When set, POE::Pipe::OneWay will constrain its search to either "pipe()", a UNIX-
domain "socketpair()", or plain old sockets, respectively. Otherwise new() will try each method in order, or a particular method
predetermined to be the best one for the current operating environment.
BUGS
POE::Pipe::OneWay may block up to one second on some systems if failure occurs while trying to create "inet" sockets.
SEE ALSO
POE::Pipe, POE::Pipe::TwoWay.
AUTHOR & COPYRIGHT
POE::Pipe::OneWay is copyright 2000-2008 by Rocco Caputo. All rights reserved. POE::Pipe::OneWay is free software; you may redistribute
it and/or modify it under the same terms as Perl itself.
perl v5.14.2 2012-05-15 POE::Pipe::OneWay(3pm)