


lib::Errno(3p)   Perl Programmers Reference Guide  lib::Errno(3p)


NAME
       Errno - System errno constants

SYNOPSIS
           use Errno qw(EINTR EIO :POSIX);


DESCRIPTION
       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: $!";
               }
           }


AUTHOR
       Graham Barr <gbarr@pobox.com>

COPYRIGHT
       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.























22/Oct/1999            perl 5.005, patch 03                     1


