sys-uptime

Description

This package provides uptime and boot time information, similar to the 'uptime' Unix command.

Synopsis

   
   require 'sys/uptime'
   include Sys

   p Uptime.days
   p Uptime.hours
   p Uptime.minutes
   p Uptime.seconds
   p Uptime.dhms.join(', ')
   p Uptime.uptime
   p Uptime.boot_time

Constants

VERSION

Returns the current version number of this package (as a string).

Class Methods

Uptime.boot_time

Returns the boot time as a Time object.

Uptime.days

Returns the total number of days the system has been up.

Uptime.hours

Returns the total number of hours the system has been up.

Uptime.minutes

Returns the total number of minutes the system has been up.

Uptime.seconds

Returns the total number of seconds the system has been up.

Uptime.dhms

Calculates and returns the number of days, hours, minutes and seconds the system has been running as a four-element Array.

Uptime.uptime

Calculates and returns the number of days, hours, minutes and seconds the system has been running as a colon-separated string.

Exceptions

Uptime::Error

Raised if something goes wrong. On Unix, this would likely mean a failure of the times() function. That would be highly unusual.
On Windows, it probably means you failed to connect to WMI properly. The mostly likely reason would be that the WMI service wasn't running.

Notes

On MS Windows each of the class methods optionally takes a host name as a single argument. The default is localhost (or whatever the result of Socket.gethostname returns).
The current time, users and load average are NOT included in this module, even though you may be used to seeing them with the command line version of 'uptime'. This is because these things have _absolutely nothing_ to do with uptime (at least, not as I logically think of uptime).
This package was tested successfully on a Solaris system with over 1600 days of uptime.

Known Bugs

None that I am aware of. Please log any bugs you find on the project website at http://www.rubyforge.org/projects/sysutils.

Questions

"Doesn't Struct::Tms do this?" - No.

License

Ruby's

Copyright

Copyright 2002-2007, Daniel J. Berger
All Rights Reserved. This module is free software. It may be used, redistributed and/or modified under the same terms as Ruby itself.

Warranty

This package is provided "as is" and without any exblockquotess or implied warranties, including, without limitation, the implied warranties of merchantability and fitness for a particular purpose.

Acknowledgements

Mike Hall for help with the BSD side of things.
Ola Eriksson, whose source code I shamelessly plagiarized to get a better implementation for systems that have the utmpx.h header file.

Author

Daniel J. Berger
djberg96 at nospam at gmail dot com
imperator on IRC (Freenode)