10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
suppose i have a perl script that is normally run this way:
./checkdisk.pl -H hostname -w 40 -c 80
but, for whatever reason, i cannot run the script directly as it should. But i can cat it through pipe. How can i pass the arguments "-H hostname -w 40 -c 80"?
so this is what i'm doing,... (6 Replies)
Discussion started by: SkySmart
6 Replies
2. Shell Programming and Scripting
I need to declare a function, this function will contain a script, this script cannot be in a file but must be piped. and then, for the script to run, i need to pass arguments to it.
everything has to be on one line. so i'm basically looking for a one-liner
here's what i'm doing:
myfunc ()... (3 Replies)
Discussion started by: SkySmart
3 Replies
3. Shell Programming and Scripting
Hi,
I am having a bit of trouble writing this.
I have the script working if I only use 1 of these but it's not working the way i need it to.
Basically more above the script i may or may not have a 5th variable defined. if i do it does a process before getting to the rest of the script.... (2 Replies)
Discussion started by: techy1
2 Replies
4. Shell Programming and Scripting
I am developing a script where 3 other scripts are included.
This is a graph related script.
COMPLETE IDEA:
-There are 3 different graph scripts. I would like to create a master graph with all 3 in one.
-User chooses the type of graph
-User is asked to enter the required auguments (... (7 Replies)
Discussion started by: newkid.7955
7 Replies
5. Shell Programming and Scripting
Hello,
I am trying to make a bash script that can pull data from a file and then change one part of said data.
I want to search by username and pull the full line. That way there is a way to replace just one part of that line then return it back to the file.
My Data is stored like:
... (1 Reply)
Discussion started by: serverfull
1 Replies
6. Shell Programming and Scripting
I have trouble getting this logic to work
#!/bin/bash
function assign_var(){
while
do
read -p "$2 :" $3
done
}
assign_var '$IPADDRESS' ipaddress IPADDRESS
Basicly, i want to make sure that entry is made (i can add more sophisticated checks later), but the idea is to recycle... (11 Replies)
Discussion started by: serverchief
11 Replies
7. Homework & Coursework Questions
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
Your script must check for the correct number of arguments (one argument). If somebody tries to invoke the... (1 Reply)
Discussion started by: brooksie91
1 Replies
8. UNIX for Dummies Questions & Answers
Hi,
What is the maximum number of arguments that could be passed to zsh ?
To find out that I tried a simple script.
And the maximum number of arguments that could be passed turned out to be 23394
#! /bin/zsh
arg=1
i=1
subIndex=23000
while
do
arg=$arg" "$i
i=$(($i + 1))... (9 Replies)
Discussion started by: matrixmadhan
9 Replies
9. Programming
I have to write a C program using sys call (read, no fread) to read from shell all the parameters, without know how many are them.
I tryed in some ways, but I have no success.
Any Idea?
Can I use read to read from stdin? (1 Reply)
Discussion started by: DNAx86
1 Replies
10. Shell Programming and Scripting
I am writing script in c shell and using this script to read the command line arguments, but it is not working. Pl. someone let me know what is the problem.
#!/bin/csh -f
if ($#argv <> 2) then
echo "you must give exactly two parameters"
else
set name1 = $argv
... (1 Reply)
Discussion started by: skumar11
1 Replies
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 v5.16.3 2013-03-04 IO::Pipe(3pm)