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Errno - System errno constants


use Errno qw(EINTR EIO :POSIX);


Errno defines and conditionally exports all the error constants defined in your system errno.h include file. It has a single export tag, :POSIX, which will export all POSIX defined error numbers.

Errno also makes %! magic such that each element of %! has a non-zero value only if $! is set to that value, eg

 use Errno;
 unless (open(FH, "/fangorn/spouse")) {
     if ($!{ENOENT}) {
         warn "Get a wife!\n";
     } else {
         warn "This path is barred: $!";


Graham Barr <>


Copyright (c) 1997-8 Graham Barr. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.