Hi friends
my C code is
int main()
{
system("cp <source> <destination>");
}
my question is
how to set variables for <source> and <destination>
how can we pass it to system() call.
can you suggest me
thankyou
kingskar (6 Replies)
#!/bin/sh
APP_ROOT_MODE1=/opt/app1.0
APP_ROOT_MODE2=/opt/app2.0
APP_ROOT=${APP_ROOT_${APP_MODE}}
# enviornment variable APP_MODE will be exported in the terminal where
# we run the applciation, its value is string - MODE1 or MODE2
# My intension is:
# when export APP_MODE=MODE1... (4 Replies)
Let's say I want to print the arguments $4 till $#, how can I do this?
$# contains the number of arguments
$@ contain all the arguments as string
What i need is something like
for i in $4_till_$#; do
#do something with $i
convert $i ~/$output
done
The first 3 arguments are used as options... (6 Replies)
Hi,
I'm trying to understand the arguments from this system call, can someone help me figure it out?
write(1, "/home/nick/11sp/fred\n", 27/home/nick/11sp/fred) = 27
for argument 1, i know it is a file descriptor which specifies standard output. Argument 2, i believe is "what is to be... (4 Replies)
This command successfully gives me the clearcase views I want in stdout, one line per view name. Each view name appears to have no spaces.
cleartool lsview | grep -i `uname -n` | grep -v "ViewStorage\\|vgr_tools_sv" | cut -f 3 -d ' '
How can write a cygwin bash "for" loop that will iterate... (4 Replies)
HI,
MY question is a very simple one:
if i want to call an awk script with the input file name and also pass a variable value , then how to do it.
#>awk -f my_script.awk -v variable=value my_inputfile.txt
I can't do it like this.
throws error:
awk: my_script.awk:18:... (0 Replies)
Hi Guy's.
Hopefully someone can help me with what I am trying to archieve.
So situation currently is, I have a script already setup however I have another script that sits infront of it.
The main script basically goes and searchs multiple platforms for a list of entered data.
In... (10 Replies)
I need to call a function within a code with $database and $ service as the arguments How do I proceed ? and how would a function be defined and these two arguments would be used inside the function?
calc_pref_avail $database $service
Best regards,
Vishal (7 Replies)
Dear All,
I want to know how can i call oracle function from shell script code . My oracle function have around 5 input parameters and one return value.
for name in *.csv;
do
echo "connecting to DB and start processing '$name' file at "
echo "csv file name=$x"
sqlplus -s scoot/tiger <!... (2 Replies)
I have a script that uses 2 arguments. I want to call the function part within this script using these same arguments. Below is what I came up with below script so far, any guidance would be helpful. Thank you!
cat backup.sh
#!/bin/bash
function usage {
echo "USAGE: $(basename $0)... (6 Replies)
Discussion started by: mbak
6 Replies
LEARN ABOUT CENTOS
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 v5.16.3 2013-03-04 IO::Pipe(3pm)