yes, so the content of file.txt will be written to stdin of a.out
Hi,
I know May be I was not clear enough of what I am trying to do,
The program is as follows -
Code:
int main()
{
if( write(STDIN_FILENO,"arghh!",6) == -1 )
{
fprintf(stderr,"Error in write\n");
exit(2);
}
return 0;
}
I am doing following on shell command line -
$>file.txt (this create an empty file.txt)
$./a.out < file.txt (redirect standard input of a.out to file.txt, a.out is supposed to WRITE to(not READ from) file.txt(that is what it is programmed to do).
($ is not part of command but of shell command prompt)
STDIN_FILENO's file status flag is 2 (O_RDWR - both read write allowed).
I expected that a.out writes to standard input; which is file.txt. But file.txt remains empty.
I 'm using RH 7.2 Genome in the Network Configuration I change therer are two places one for static hostname for my machine and in DNS hostname I don't know what happen when restarting my PC when connecting using dialer I can't browse the Internet also I can't use sendmail .......Server timeout... (2 Replies)
The #1 Online Store for Louis Vuitton Replicas is: http://www.opichina.com.cn.
We offer Louis Vuitton Replicas and more! Whatever you call it: LV Bags, LV Replicas, Louis Vuitton Fake, Louis Vuitton Knockoffs, Louis Vuitton Bag, Louis Vuitton Purse, Louis Vuitton Wallet, Louis Vuitton Shoes,... (10 Replies)
Hi,
Could someone please tell me what would happen if the following were entered into the command line:
rm -i /books/*.*
rm /books/*
Many thanks! (3 Replies)
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One bad day, the id was deleted accidentally. But the home directory, files and everything... (1 Reply)
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Please tell me whether my explanation is right or wrong? If wrong, please explain.
"The BIOS checks the system and loads this initial bootstrapping code into
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Hello,
Who actually wrote Professional Linux Programming of Wrox publication as there are two different sets of writers, one set consists of Jon Masters and Richard Blum and another set of writers is Neil Mathew with lots of other writers. Plz resolve it. I'm really confused.
Regards.. (0 Replies)
Hi everyone. Silly might be silly be I'm still new to bash. I'm trying to make an Alarm Clock for in the morning using my laptop i have wrote this Simple Script but i cant work out how to play it at a certain time.
#!/bin/bash
cd /home/josh/Music/Bruno_Mars/Hooligans/
cvlc... (8 Replies)
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Perl::Critic::Policy::InputOutput::ProhibitTwoArgOpen(3)User Contributed Perl DocumentatioPerl::Critic::Policy::InputOutput::ProhibitTwoArgOpen(3)NAME
Perl::Critic::Policy::InputOutput::ProhibitTwoArgOpen - Write "open $fh, q{<}, $filename;" instead of "open $fh, "<$filename";".
AFFILIATION
This Policy is part of the core Perl::Critic distribution.
DESCRIPTION
The three-argument form of "open" (introduced in Perl 5.6) prevents subtle bugs that occur when the filename starts with funny characters
like '>' or '<'. The IO::File module provides a nice object-oriented interface to filehandles, which I think is more elegant anyway.
open( $fh, '>output.txt' ); # not ok
open( $fh, q{>}, 'output.txt' ); # ok
use IO::File;
my $fh = IO::File->new( 'output.txt', q{>} ); # even better!
It's also more explicitly clear to define the input mode of the file, as in the difference between these two:
open( $fh, 'foo.txt' ); # BAD: Reader must think what default mode is
open( $fh, '<', 'foo.txt' ); # GOOD: Reader can see open mode
This policy will not complain if the file explicitly states that it is compatible with a version of perl prior to 5.6 via an include
statement, e.g. by having "require 5.005" in it.
CONFIGURATION
This Policy is not configurable except for the standard options.
NOTES
There are two cases in which you are forced to use the two-argument form of open. When re-opening STDIN, STDOUT, or STDERR, and when doing
a safe pipe open, as described in perlipc.
SEE ALSO
IO::Handle
IO::File
AUTHOR
Jeffrey Ryan Thalhammer <jeff@imaginative-software.com>
COPYRIGHT
Copyright (c) 2005-2011 Imaginative Software Systems. 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 2014-06-09 Perl::Critic::Policy::InputOutput::ProhibitTwoArgOpen(3)
04-01-2009
May be I was not clear enough of what I am trying to do,