August 1998
Intermediate to advanced
800 pages
39h 20m
English
Content preview from Perl CookbookBecome 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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Program: lst
Have you ever wondered what the newest or biggest files within a directory are? The standard ls program has options for listing out directories sorted in time order (the -t flag) and for recursing into subdirectories (the -R flag). However, it pauses at each directory to display the sorted contents of just that directory. It doesn’t descend through all the subdirectories first and then sort everything it finds.
The following lst program does that. Here’s an example using its -l flag to get a long listing:
% lst -l /etc
12695 0600 1 root wheel 512 Fri May 29 10:42:41 1998 /etc/ssh_random_seed12640 0644 1 root wheel 10104 Mon May 25 7:39:19 1998 /etc/ld.so.cache12626 0664 1 root wheel 12288 Sun May 24 19:23:08 1998 /etc/psdevtab12304 0644 1 root root 237 Sun May 24 13:59:33 1998 /etc/exports12309 0644 1 root root 3386 Sun May 24 13:24:33 1998 /etc/inetd.conf12399 0644 1 root root 30205 Sun May 24 10:08:37 1998 /etc/sendmail.cf18774 0644 1 gnat perldoc 2199 Sun May 24 9:35:57 1998 /etc/X11/XMetroconfig12636 0644 1 root wheel 290 Sun May 24 9:05:40 1998 /etc/mtab12627 0640 1 root root 0 Sun May 24 8:24:31 1998 /etc/wtmplock12310 0644 1 root tchrist 65 Sun May 24 8:23:04 1998 /etc/issue/etc/X11/XMetroconfig showed up in the middle of the listing for /etc because it wasn’t just for /etc, but for everything within that directory, recursively.
Other supported options include sorting on read time instead of write time using -u and sorting ...
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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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