/usr/share/perl5/Safeguards.pm is in percona-toolkit 3.0.6+dfsg-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 | # This program is copyright 2013 Percona Ireland Ltd.
# Feedback and improvements are welcome.
#
# THIS PROGRAM IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED
# WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
# MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
#
# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free Software
# Foundation, version 2; OR the Perl Artistic License. On UNIX and similar
# systems, you can issue `man perlgpl' or `man perlartistic' to read these
# licenses.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Software Foundation, Inc., 59 Temple
# Place, Suite 330, Boston, MA 02111-1307 USA.
# ###########################################################################
# Safeguards package
# ###########################################################################
package Safeguards;
use strict;
use warnings FATAL => 'all';
use English qw(-no_match_vars);
use constant PTDEBUG => $ENV{PTDEBUG} || 0;
sub new {
my ($class, %args) = @_;
my $self = {
disk_bytes_free => $args{disk_bytes_free} || 104857600, # 100 MiB
disk_pct_free => $args{disk_pct_free} || 5,
};
return bless $self, $class;
}
sub get_disk_space {
my ($self, %args) = @_;
my $filesystem = $args{filesystem} || $ENV{PWD};
# Filesystem 1024-blocks Used Available Capacity Mounted on
# /dev/disk0s2 118153176 94409664 23487512 81% /
my $disk_space = `df -P -k "$filesystem"`;
chop($disk_space) if $disk_space;
PTDEBUG && _d('Disk space on', $filesystem, $disk_space);
return $disk_space;
}
sub check_disk_space() {
my ($self, %args) = @_;
my $disk_space = $args{disk_space};
PTDEBUG && _d("Checking disk space:\n", $disk_space);
# There may be other info, so extract just the partition line,
# i.e. the first line starting with /, as in:
# Filesystem 1024-blocks Used Available Capacity Mounted on
# /dev/disk0s2 118153176 94409664 23487512 81% /
my ($partition) = $disk_space =~ m/^\s*(\/.+)/m;
PTDEBUG && _d('Partition:', $partition);
die "Failed to parse partition from disk space:\n$disk_space"
unless $partition;
# Parse the partition line.
my (undef, undef, $bytes_used, $bytes_free, $pct_used, undef)
= $partition =~ m/(\S+)/g;
PTDEBUG && _d('Bytes used:', $bytes_used, 'free:', $bytes_free,
'Percentage used:', $pct_used);
# Convert 1024-blocks blocks to bytes.
$bytes_used = ($bytes_used || 0) * 1024;
$bytes_free = ($bytes_free || 0) * 1024;
# Convert pct used to free.
$pct_used =~ s/%//;
my $pct_free = 100 - ($pct_used || 0);
# Return true if both thresholds are ok.
return $bytes_free >= $self->{disk_bytes_free}
&& $pct_free >= $self->{disk_pct_free};
}
sub _d {
my ($package, undef, $line) = caller 0;
@_ = map { (my $temp = $_) =~ s/\n/\n# /g; $temp; }
map { defined $_ ? $_ : 'undef' }
@_;
print STDERR "# $package:$line $PID ", join(' ', @_), "\n";
}
1;
# ###########################################################################
# End Safeguards package
# ###########################################################################
|