mirror of
https://github.com/percona/percona-toolkit.git
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95 lines
3.3 KiB
Perl
95 lines
3.3 KiB
Perl
# This program is copyright 2013 Percona Ireland Ltd.
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# Feedback and improvements are welcome.
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#
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# THIS PROGRAM IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED
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# WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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# MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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#
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# This program is free software; you can redistribute it and/or modify it under
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# the terms of the GNU General Public License as published by the Free Software
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# Foundation, version 2; OR the Perl Artistic License. On UNIX and similar
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# systems, you can issue `man perlgpl' or `man perlartistic' to read these
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# licenses.
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#
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# You should have received a copy of the GNU General Public License along with
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# this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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# Place, Suite 330, Boston, MA 02111-1307 USA.
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# ###########################################################################
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# Safeguards package
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# ###########################################################################
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package Safeguards;
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use strict;
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use warnings FATAL => 'all';
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use English qw(-no_match_vars);
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use constant PTDEBUG => $ENV{PTDEBUG} || 0;
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sub new {
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my ($class, %args) = @_;
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my $self = {
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disk_bytes_free => $args{disk_bytes_free} || 104857600, # 100 MiB
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disk_pct_free => $args{disk_pct_free} || 5,
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};
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return bless $self, $class;
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}
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sub get_disk_space {
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my ($self, %args) = @_;
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my $filesystem = $args{filesystem} || $ENV{PWD};
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# Filesystem 1024-blocks Used Available Capacity Mounted on
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# /dev/disk0s2 118153176 94409664 23487512 81% /
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my $disk_space = `df -P -k "$filesystem"`;
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chop($disk_space) if $disk_space;
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PTDEBUG && _d('Disk space on', $filesystem, $disk_space);
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return $disk_space;
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}
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sub check_disk_space() {
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my ($self, %args) = @_;
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my $disk_space = $args{disk_space};
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PTDEBUG && _d("Checking disk space:\n", $disk_space);
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# There may be other info, so extract just the partition line,
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# i.e. the first line starting with /, as in:
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# Filesystem 1024-blocks Used Available Capacity Mounted on
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# /dev/disk0s2 118153176 94409664 23487512 81% /
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my ($partition) = $disk_space =~ m/^\s*(\/.+)/m;
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PTDEBUG && _d('Partition:', $partition);
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die "Failed to parse partition from disk space:\n$disk_space"
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unless $partition;
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# Parse the partition line.
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my (undef, undef, $bytes_used, $bytes_free, $pct_used, undef)
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= $partition =~ m/(\S+)/g;
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PTDEBUG && _d('Bytes used:', $bytes_used, 'free:', $bytes_free,
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'Percentage used:', $pct_used);
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# Convert 1024-blocks blocks to bytes.
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$bytes_used = ($bytes_used || 0) * 1024;
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$bytes_free = ($bytes_free || 0) * 1024;
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# Convert pct used to free.
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$pct_used =~ s/%//;
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my $pct_free = 100 - ($pct_used || 0);
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# Return true if both thresholds are ok.
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return $bytes_free >= $self->{disk_bytes_free}
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&& $pct_free >= $self->{disk_pct_free};
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}
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sub _d {
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my ($package, undef, $line) = caller 0;
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@_ = map { (my $temp = $_) =~ s/\n/\n# /g; $temp; }
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map { defined $_ ? $_ : 'undef' }
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@_;
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print STDERR "# $package:$line $PID ", join(' ', @_), "\n";
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}
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1;
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# ###########################################################################
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# End Safeguards package
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# ###########################################################################
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