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file status operators -x and -s
File Handling example from a Well House Consultants training course
More on File Handling [link]
Source code: reporter Module: P207
#!/usr/bin/env perl
# reporter - tell us about files ...

open (FILES,"ls|") || die "Can't read pipe\n";

while ($line = <FILES>) {
        chop $line;
        print ((-x $line) ? "Can":"Can't",
        " execute file $line. Size is ",
        -s $line," bytes\n");
        }

__END__

-bash-3.2$ perl reporter
Can't execute file addplus. Size is 4077 bytes
Can't execute file bridges. Size is 1347 bytes
Can't execute file christmas. Size is 1437 bytes
Can't execute file ck. Size is 1478 bytes
Can't execute file costa. Size is 1460 bytes
Can't execute file ddd. Size is 465 bytes
Can execute file fan. Size is 598 bytes
Can't execute file forvat. Size is 1034 bytes
Can't execute file fprint. Size is 1677 bytes
Can't execute file fsv. Size is 1847 bytes
Can't execute file leedspark. Size is 858 bytes
Can't execute file legacy. Size is 798 bytes
Can't execute file newread. Size is 423 bytes
Can't execute file output.txt. Size is 416 bytes
Can't execute file park. Size is 1221 bytes
Can't execute file paut. Size is 962 bytes
Can't execute file perlwget. Size is 600 bytes
Can execute file piper. Size is 305 bytes
Can't execute file procmon. Size is 292 bytes
Can execute file reporter. Size is 273 bytes
Can execute file sp. Size is 155 bytes
Can't execute file tin. Size is 1417 bytes
Can't execute file wacsal. Size is 2218 bytes
-bash-3.2$

Learn about this subject
This module and example are covered on the following public courses:
 * Perl Programming
 * Perl bootcamp
 * Learning to program in Perl
 * Perl Programming
Also available on on site courses for larger groups

Books covering this topic
Yes. We have over 700 books in our library. Books covering Perl are listed here and when you've selected a relevant book we'll link you on to Amazon to order.

Other Examples
This example comes from our "File Handling" training module. You'll find a description of the topic and some other closely related examples on the "File Handling" module index page.

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