Perl 5 version 20.0 documentation
Errno - System errno constants
- use Errno qw(EINTR EIO :POSIX);
defines and conditionally exports all the error constants
defined in your system
include file. It has a single export
, which will export all POSIX defined error numbers.
magic such that each element of
non-zero value only if
is set to that value. For example:
If a specified constant
does not exist on the system,
. You may use
to check whether the
constant is available on the system.
Importing a particular constant may not be very portable, because the
import will fail on platforms that do not have that constant. A more
portable way to set
to a valid value is to use:
Graham Barr <email@example.com>
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.