February 2006
Intermediate to advanced
304 pages
6h 16m
English
Content preview from Wicked Cool Perl Scripts
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
#26 Deleting a User
Your user has been disabled. Now get rid of him.
Warning:
This script can destroy data and depends not only on the operating system you are using, but also on your system administration policies. Please inspect it before use.
The Code
1 #!/usr/bin/perl 2 use strict; 3 use warnings; 4 use Fcntl ':flock'; # import LOCK_* constants 5 6 if ($#ARGV != 0) { 7 print STDERR "Usage is $0 <user>\n"; 8 exit (8); 9 } 10 11 my $user = $ARGV[0]; 12 13 sub edit_file($) 14 { 15 my $file = shift; 16 17 open IN_FILE, "<$file" or 18 die("Could not open $file for input"); 19 20 open OUT_FILE, ">$file.new" or 21 die("Could not open $file.new for output"); 22 23 while (1) { 24 my $line = <IN_FILE>; 25 if (not defined($line)) { 26 last; 27 } ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.