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
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
|
# please insert nothing before this line: -*- mode: cperl; cperl-indent-level: 4; cperl-continued-statement-offset: 4; indent-tabs-mode: nil -*-
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
package Apache2::Resource;
use strict;
use warnings FATAL => 'all';
use mod_perl2;
use Apache2::Module ();
use BSD::Resource qw(setrlimit getrlimit get_rlimits);
use Apache2::Const -compile => qw(OK);
$Apache2::Resource::VERSION = '1.72';
our $Debug;
$Debug ||= 0;
sub MB ($) {
my $num = shift;
return ($num < (1024 * 1024)) ? $num*1024*1024 : $num;
}
sub BM ($) {
my $num = shift;
return ($num > (1024 * 1024)) ? '(' . ($num>>20) . 'Mb)' : '';
}
sub DEFAULT_RLIMIT_DATA () { 64 } # data (memory) size in MB
sub DEFAULT_RLIMIT_AS () { 64 } # address space (memory) size in MB
sub DEFAULT_RLIMIT_CPU () { 60*6 } # cpu time in seconds
sub DEFAULT_RLIMIT_CORE () { 0 } # core file size (MB)
sub DEFAULT_RLIMIT_RSS () { 16 } # resident set size (MB)
sub DEFAULT_RLIMIT_FSIZE () { 10 } # file size (MB)
sub DEFAULT_RLIMIT_STACK () { 20 } # stack size (MB)
my %is_mb = map {$_, 1} qw{DATA RSS STACK FSIZE CORE MEMLOCK AS};
sub debug { print STDERR @_ if $Debug }
sub install_rlimit ($$$) {
my ($res, $soft, $hard) = @_;
my $name = $res;
my $cv = \&{"BSD::Resource::RLIMIT_${res}"};
eval { $res = $cv->() };
return if $@;
unless ($soft) {
my $defval = \&{"DEFAULT_RLIMIT_${name}"};
if (defined &$defval) {
$soft = $defval->();
} else {
warn "can't find default for `$defval'\n";
}
}
$hard ||= $soft;
debug "Apache2::Resource: PID $$ attempting to set `$name'=$soft:$hard ...";
($soft, $hard) = (MB $soft, MB $hard) if $is_mb{$name};
return setrlimit $res, $soft, $hard;
}
sub handler {
while (my ($k, $v) = each %ENV) {
next unless $k =~ /^PERL_RLIMIT_(\w+)$/;
$k = $1;
next if $k eq "DEFAULTS";
my ($soft, $hard) = split ":", $v, 2;
$hard ||= $soft;
my $set = install_rlimit $k, $soft, $hard;
debug "not " unless $set;
debug "ok\n";
debug $@ if $@;
}
Apache2::Const::OK;
}
sub default_handler {
while (my ($k, $v) = each %Apache2::Resource::) {
next unless $k =~ s/^DEFAULT_/PERL_/;
$ENV{$k} = "";
}
handler();
}
sub status_rlimit {
my $lim = get_rlimits();
my @retval = ("<table border=1><tr>",
(map "<th>$_</th>", qw(Resource Soft Hard)),
"</tr>");
for my $res (keys %$lim) {
my $val = eval "&BSD::Resource::${res}()";
my ($soft, $hard) = getrlimit $val;
(my $limit = $res) =~ s/^RLIMIT_//;
($soft, $hard) = ("$soft " . BM($soft), "$hard ". BM($hard))
if $is_mb{$limit};
push @retval,
"<tr>", (map { "<td>$_</td>" } $res, $soft, $hard), "</tr>\n";
}
push @retval, "</table><P>";
push @retval, "<small>Apache2::Resource $Apache2::Resource::VERSION</small>";
return \@retval;
}
if ($ENV{MOD_PERL}) {
if ($ENV{PERL_RLIMIT_DEFAULTS}) {
require Apache2::ServerUtil;
Apache2::ServerUtil->server->push_handlers(
PerlChildInitHandler => \&default_handler);
}
Apache2::Status->menu_item(rlimit => "Resource Limits",
\&status_rlimit)
if Apache2::Module::loaded("Apache2::Status");
}
# perl Apache2/Resource.pm
++$Debug, default_handler unless caller();
1;
__END__
|
