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package Linux::SysInfo; |
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use 5.006; |
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use strict; |
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use warnings; |
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=head1 NAME |
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Linux::SysInfo - Perl interface to the sysinfo(2) Linux system call. |
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=head1 VERSION |
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Version 0.15 |
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=cut |
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our $VERSION; |
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BEGIN { |
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$VERSION = '0.15'; |
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} |
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=head1 SYNOPSIS |
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use Linux::SysInfo qw; |
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my $si = sysinfo; |
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print "$_: $si->{$_}\n" for keys %$si; |
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=head1 DESCRIPTION |
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This module is a wrapper around the C Linux system call. |
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It gives information about the current uptime, load average, memory usage and processes running. |
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Other systems have also this system call (e.g. Solaris), but in most cases the returned information is different. |
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=head1 CONSTANTS |
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=head2 C |
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This constant is set to C<1> if your kernel supports the three extended fields C, C and C ; and to C<0> otherwise. |
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=head1 FUNCTIONS |
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=cut |
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BEGIN { |
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require XSLoader; |
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XSLoader::load(__PACKAGE__, $VERSION); |
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} |
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=head2 C |
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This function takes no argument. |
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It returns C on failure or a hash reference whose keys are the members name of the C on success : |
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=over 4 |
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=item * |
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C |
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Seconds elapsed since the system booted. |
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=item * |
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C, C, C |
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1, 5 and 15 minutes load average. |
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=item * |
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C |
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Total usable main memory size. |
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=item * |
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C |
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Available memory size. |
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=item * |
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C |
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Amount of shared memory. |
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=item * |
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C |
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Memory used by buffers. |
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=item * |
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C |
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Total swap space size. |
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=item * |
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C |
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Swap space still available. |
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=item * |
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C |
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Number of current processes. |
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=back |
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Prior to Linux 2.3.23 on i386 and 2.3.48 on all other architectures, the memory sizes were given in bytes. |
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Since then, the following members are also available and all the memory sizes are given as multiples of C bytes : |
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=over 4 |
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=item * |
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C |
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Total high memory size. |
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=item * |
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C |
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Available high memory size. |
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=item * |
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C |
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Memory unit size in bytes. |
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=back |
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=head1 EXPORT |
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The only function of this module, C, and the constant C are only exported on request. |
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Functions are also exported by the C<:funcs> tag, and constants by C<:consts>. |
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=cut |
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use base qw; |
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our @EXPORT = (); |
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our %EXPORT_TAGS = ( |
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'funcs' => [ qw ], |
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'consts' => [ qw ] |
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); |
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our @EXPORT_OK = map { @$_ } values %EXPORT_TAGS; |
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$EXPORT_TAGS{'all'} = [ @EXPORT_OK ]; |
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=head1 BINARY COMPATIBILITY |
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If you upgrade your kernel to a greater version than 2.3.23 on i386 or 2.3.48 on any other platform, you will need to rebuild the module to access the extended fields. |
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Moreover, since the perl hash function has changed after the 5.6 version, you will also need to recompile the module if you upgrade your perl from a version earlier than 5.6. |
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=head1 DEPENDENCIES |
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L 5.6. |
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A C compiler. |
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This module may happen to build with a C++ compiler as well, but don't rely on it, as no guarantee is made in this regard. |
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=head1 SEE ALSO |
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The C man page. |
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L : Gather information about your system. |
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L : Try several different methods to retrieve the load average. |
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L : Wrapper to the C BSD system call. |
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=head1 AUTHOR |
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Vincent Pit, C<< >>, L. |
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You can contact me by mail or on C (vincent). |
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185
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=head1 BUGS |
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Please report any bugs or feature requests to C, or through the web interface at L. |
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I will be notified, and then you'll automatically be notified of progress on your bug as I make changes. |
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=head1 SUPPORT |
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You can find documentation for this module with the perldoc command. |
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194
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perldoc Linux::SysInfo |
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=head1 COPYRIGHT & LICENSE |
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Copyright 2007,2008,2009,2010,2013,2017 Vincent Pit, all rights reserved. |
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This program is free software; you can redistribute it and/or modify it |
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under the same terms as Perl itself. |
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203
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=cut |
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1; # End of Linux::SysInfo |