| module Errno |
Index:
Ruby exception objects are subclasses of
Exception. However,
operating systems typically report errors using plain
integers. Module Errno is created dynamically to map these
operating system errors to Ruby classes, with each error number generating
its own subclass of SystemCallError. As the subclass is created
in module Errno, its name will start Errno::.
The names of the Errno
:: classes depend on the environment in
which Ruby runs. On a typical Unix or Windows platform, there are
Errno classes such as Errno::EACCES,
Errno::EAGAIN, Errno::EINTR, and so on.
The integer operating system error number corresponding to a particular error is available as the class constant
Errno::error::Errno.
Errno::EACCES::Errno |
-> | 13 |
Errno::EAGAIN::Errno |
-> | 11 |
Errno::EINTR::Errno |
-> | 4 |
The full list of operating system errors on your particular platform are available as the constants of Errno.
Errno.constants |
-> | E2BIG, EACCES, EADDRINUSE, EADDRNOTAVAIL, EADV, EAFNOSUPPORT, EAGAIN, ... |
Extracted from the book "Programming Ruby - The Pragmatic Programmer's Guide"
Copyright © 2000 Addison Wesley Longman, Inc. Released under the terms of the Open Publication License V1.0.
This reference is available for download.