Perl Guru Forums: Perl Programming Help: Beginner: writing to a file from perl

CGI/Perl Guide | Learning Center | Forums | Advertise | Login

Site Search: in


	MAIN INDEX	SEARCH POSTS	WHO'S ONLINE	LOG IN

Home: Perl Programming Help: Beginner:
writing to a file from perl

Xploit
Novice

Apr 18, 2011, 9:09 AM

Post #1 of 2 (468 views)

writing to a file from perl	Can't Post

all im trying to do here is put the output of the command into a file. and its not working. what am i doing wrong here? code im using is below:

#!/usr/bin/perl
use warnings;
use strict;

open INPUT, "<ips.txt" or die $!;
my @file = <INPUT>;
open OUTPUT, ">>output.txt" or die $!;

for (@file) {
select OUTPUT;
system("ping -c 1 $_");

}

miller
User

Apr 18, 2011, 10:05 AM

Post #2 of 2 (465 views)

Re: [Xploit] writing to a file from perl [In reply to]	Can't Post

Using select in that way won't work because the output of system is printing to a different STDOUT.

Instead either capture the results of your external command using backticks ``, or have the system command append to the file.

Code

#!/usr/bin/perl  
use warnings;  
use strict;  
 
my @ips = do { 
	open my $fh, 'ips.txt' or die $!; 
	<$fh>; 
}; 
chomp @ips; 
 
open my $fh, '>>', 'output.txt' or die $!;  
 
for (@file) {  
	print $fh `ping -c 1 $_`;  
}

Code

for (@file) {  
	system("ping -c 1 $_ >> output.txt");  
}

- Miller

(This post was edited by miller on Apr 18, 2011, 10:06 AM)

Search for (options)

Web Applications & Managed Hosting Powered by Gossamer Threads
Visit our Mailing List Archives