NAME

Unix::Uptime - Determine the current uptime, in seconds, and load averages, across different *NIX architectures

SYNOPSIS

  # Standard Usage
  use Unix::Uptime;

  my $uptime = Unix::Uptime->uptime(); # 2345

  # "HiRes" mode
  use Unix::Uptime qw(:hires);

  my $uptime = Unix::Uptime->uptime_hires(); # 2345.123593

  # Load Average
  my ($load1, $load5, $load15) = Unix::Uptime->load(); # (1.0, 2.0, 0.0)

DESCRIPTION

This is a rather simple module that abstracts the task of figuring out the current system uptime, in seconds. It was born out of a desire to do this on non-Linux systems, without SNMP. If you want to use SNMP, there are pleanty of modules on CPAN already.

Additionally, since version 0.33_02, it supports retrieving the load average.

Currently, this module just supports Linux, FreeBSD, Darwin (Mac OS X), OpenBSD, and NetBSD. It should be easy enough to add support for other operating systems, though.

OPTIONS

While this module doesn't provide any functions for exporting, if the tag ":hires" is given, then uptime_hires static method will be available. It returns decimal numbers when possible, but on some systems it is simply an alias for "uptime()". This will likely require the Time::HiRes module to be available. Otherwise, they will simply be whole seconds.

METHODS

The following static (class) methods are available:

uptime

This takes no arguments, and simply returns the number of seconds this system has been running. This will always be an integer.

uptime_hires

This is only available if the ":hires" import tag is used. It returns the system uptime with a greater resolution than one second on supported platforms. On some platforms, its results may not be any more precise than "uptime()", though. On different platforms, this requires different additional modules:

Linux: No additional requirements.
FreeBSD: Requires Time::HiRes
Darwin, OpenBSD, NetBSD: No more precise than uptime()

load

This returns an array of the load averages for the last 1, 5, and 15 minutes. The degree of precision varies from system to system.

BUGS

This currently doesn't support more than Linux, FreeBSD, Darwin (Mac OS X), OpenBSD, and NetBSD. Contributions for other operating systems would be welcome.

CAVEATS

NOTE: This module is still a work in progress, under fairly heavy development. While I think the final API should be mostly finalized at this point, I won't commit to an API freeze until version 1.0.

CONTRIBUTING

This project is developed using git. The repository may be browsed at: <http://git.pioto.org/gitweb/Unix-Uptime.git>

Patches in git-format-patch style are preferred. Either send them to me by email, or open an RT ticket <http://rt.cpan.org/Public/Bug/Report.html?Queue=Unix-Uptime>.

AUTHOR

Mike Kelly <pioto@pioto.org>

COPYRIGHT AND LICENSE

This module is free software; you can redistribute it and/or modify it under the same terms as Perl 5.10.0. For more details, see the full text of the licenses at <http://www.perlfoundation.org/artistic_license_1_0>, and <http://www.gnu.org/licenses/gpl-2.0.html>.

This program is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of merchantability or fitness for a particular purpose.