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package IS::Init; |
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95805
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use strict; |
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31
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14
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534
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3
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12748
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use IO::Socket; |
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411740
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124656
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use IO::Select; |
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30776
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14
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727
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11546
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use POSIX qw(:signal_h :errno_h :sys_wait_h); |
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122848
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55074
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use Data::Dump qw(dump); |
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0
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my $debug=$ENV{DEBUG} || 0; |
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sub debug |
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{ |
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warn @_ if $debug; |
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} |
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15
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BEGIN { |
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use vars qw ($VERSION); |
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$VERSION = 0.93; |
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} |
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20
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=head1 NAME |
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22
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IS::Init - Clusterwide "init", spawn cluster applications |
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24
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=head1 SYNOPSIS |
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26
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use IS::Init; |
27
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28
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my $init = new IS::Init; |
29
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30
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# spawn all apps for resource group "foo", runlevel "run" |
31
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$init->tell("foo","run"); |
32
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33
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# spawn all apps for resource group "foo", runlevel "runmore" |
34
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# (this stops everything started by runlevel "run") |
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$init->tell("foo","runmore"); |
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37
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=head1 DESCRIPTION |
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39
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This module provides basic "init" functionality, giving you a single |
40
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inittab-like file to manage initialization and daemon startup across a |
41
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cluster or collection of machines. |
42
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43
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=head1 USAGE |
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45
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This module's package includes a script 'isinit', which is intended to |
46
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be a bolt-in cluster init tool, calling IS::Init. The script is |
47
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called like 'init', with the addition of a new "resource group" |
48
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argument. |
49
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50
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This module is intended to be used like 'init' and 'telinit' -- the |
51
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first execution runs as a daemon, spawning and managing processes. |
52
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Later executions talk to the first, requesting it to switch to |
53
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different runlevels. |
54
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55
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The module references a configuration file, /etc/isinittab by default, |
56
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which is identical in format to /etc/inittab, with a new "resource |
57
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group" column added. This file must be replicated across all hosts in |
58
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the cluster by some means. |
59
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60
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A "resource group" is a collection of applications and physical |
61
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resources which together make up a coherent function. For example, |
62
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sendmail, /etc/sendmail.cf, and the /var/spool/mqueue directory might |
63
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make up a resource group. From /etc/isinittab you could spawn the |
64
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scripts which update sendmail.cf, mount mqueue, and then start |
65
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sendmail itself. |
66
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67
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=head1 PUBLIC METHODS |
68
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69
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=head2 new |
70
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71
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=cut |
72
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73
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sub new |
74
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{ |
75
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my $class=shift; |
76
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$class = (ref $class || $class); |
77
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my $self={}; |
78
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bless $self, $class; |
79
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80
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=pod |
81
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82
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The constructor accepts an optional hash containing the paths to the |
83
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configuration file and to the socket, like this: |
84
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85
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my $init = new IS::Init ( |
86
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'config' => '/etc/isinittab', |
87
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'socket' => '/var/run/is/init.s' |
88
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'initstat' => '/var/run/is/initstat' |
89
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); |
90
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91
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=cut |
92
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93
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my %parms=@_; |
94
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95
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$self->{'config'} = $parms{'config'} || "/etc/isinittab"; |
96
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$self->{'socket'} = "/var/run/is/init.s"; |
97
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$self->_config(); |
98
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$self->{'socket'} = $parms{'socket'} if $parms{'socket'}; |
99
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100
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($self->{'group'}, $self->{'level'}) = ("NULL", "NULL"); |
101
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102
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=pod |
103
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104
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The first time this method is executed on a machine, it opens a UNIX |
105
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domain socket, /var/run/is/init.s by default. Subsequent executions |
106
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communicate with the first via this socket. |
107
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108
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=cut |
109
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110
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$self->_open_socket() || $self->_start_daemon() || die $!; |
111
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112
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return $self; |
113
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} |
114
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115
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=head2 tell($resource_group,$runlevel) |
116
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117
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This method talks to a running IS::Init daemon, telling it to switch |
118
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the given resource group to the given runlevel. |
119
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120
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All processes listed in the configuration file (normally |
121
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/etc/isinittab) which belong to the new runlevel will be started if |
122
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they aren't already running. |
123
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124
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All processes in the resource group which do not belong to the new |
125
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runlevel will be killed. |
126
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127
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Other resource groups will not be affected. |
128
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129
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=cut |
130
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131
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sub tell |
132
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{ |
133
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my ($self,$group,$runlevel)=@_; |
134
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my $socket = $self->_open_socket() || die $!; |
135
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print $socket "$group $runlevel\n"; |
136
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close($socket); |
137
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1; |
138
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} |
139
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140
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sub status |
141
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{ |
142
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my $self=shift; |
143
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my %parm = @_; |
144
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my $group = $parm{'group'} if $parm{'group'}; |
145
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my $level = $parm{'level'} if $parm{'level'}; |
146
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my $initstat = $parm{'initstat'} if $parm{'initstat'}; |
147
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# allow this to be called as IS::Init->status(...) |
148
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$self=bless({},$self) unless ref($self); |
149
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$self->{'initstat'} = $initstat if $initstat; |
150
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return "" unless $self->{'initstat'} && -f $self->{'initstat'}; |
151
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my $startid="start"; |
152
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my $endid="end"; |
153
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my $out; |
154
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do |
155
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{ |
156
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$out =""; |
157
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open(STATUS,"<$self->{'initstat'}") || die $!; |
158
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while() |
159
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{ |
160
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if (/^!startid (.*)/) |
161
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{ |
162
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$startid = $1; |
163
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next; |
164
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} |
165
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next if $startid eq "start"; |
166
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if (/^!endid (.*)/) |
167
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{ |
168
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$endid = $1; |
169
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last; |
170
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} |
171
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my ($sgroup,$state,$slevel) = split; |
172
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next unless $state; |
173
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if ($group) |
174
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{ |
175
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next if $group ne $sgroup; |
176
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s/^\S+\s+(.*?)\s*$/$1/; |
177
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chomp; |
178
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} |
179
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if ($level) |
180
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{ |
181
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next if $level ne $slevel; |
182
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s/^(\S+)\s+.*$/$1/; |
183
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chomp; |
184
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} |
185
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$out .= $_; |
186
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} |
187
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188
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} while $startid ne $endid; |
189
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return $out; |
190
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} |
191
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192
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sub stopall |
193
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{ |
194
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my ($self)=@_; |
195
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my $socket = $self->_open_socket() || die $!; |
196
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print $socket "stopall"; |
197
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close($socket); |
198
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1; |
199
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} |
200
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201
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202
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sub _open_socket |
203
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{ |
204
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my $self=shift; |
205
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my $client = new IO::Socket::UNIX ( |
206
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Peer => $self->{'socket'}, |
207
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Type => SOCK_STREAM |
208
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); |
209
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return $client; |
210
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} |
211
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212
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sub _start_daemon |
213
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{ |
214
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my $self=shift; |
215
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216
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my $child; |
217
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unless ($child = fork()) |
218
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{ |
219
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while(1) |
220
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{ |
221
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unlink $self->{'socket'}; |
222
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my $server = new IO::Socket::UNIX ( |
223
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Local => $self->{'socket'}, |
224
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Type => SOCK_STREAM, |
225
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Listen => SOMAXCONN |
226
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) || die $!; |
227
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while(my $client = $server->accept()) |
228
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{ |
229
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|
$SIG{CHLD} = 'IGNORE'; |
230
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|
debug "reading\n"; |
231
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|
my $data=<$client>; |
232
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|
$data="" unless $data; |
233
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chomp($data=$data); |
234
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debug "$data\n" if $data; |
235
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|
debug "done reading, got: $data\n"; |
236
|
|
|
|
|
|
|
$self->_stopall() if $data =~ /^stopall/; |
237
|
|
|
|
|
|
|
my ($group,$level) = split(' ',$data); |
238
|
|
|
|
|
|
|
$self->_spawn($group,$level); |
239
|
|
|
|
|
|
|
$self->_sigchld(); |
240
|
|
|
|
|
|
|
close($client); |
241
|
|
|
|
|
|
|
} |
242
|
|
|
|
|
|
|
debug "restarting socket\n"; |
243
|
|
|
|
|
|
|
} |
244
|
|
|
|
|
|
|
} |
245
|
|
|
|
|
|
|
|
246
|
|
|
|
|
|
|
debug "IS::Init daemon started as PID $child\n"; |
247
|
|
|
|
|
|
|
|
248
|
|
|
|
|
|
|
sleep 1; |
249
|
|
|
|
|
|
|
return $child; |
250
|
|
|
|
|
|
|
} |
251
|
|
|
|
|
|
|
|
252
|
|
|
|
|
|
|
sub _status |
253
|
|
|
|
|
|
|
{ |
254
|
|
|
|
|
|
|
my ($self,$group,$level,$state) = @_; |
255
|
|
|
|
|
|
|
$level = $self->{'status'}{$group}{'level'} unless $level; |
256
|
|
|
|
|
|
|
$self->{'status'}{$group}{'level'}=$level; |
257
|
|
|
|
|
|
|
$self->{'status'}{$group}{'state'}=$state; |
258
|
|
|
|
|
|
|
return "" unless $self->{'initstat'}; |
259
|
|
|
|
|
|
|
# fetch all groups in inittab |
260
|
|
|
|
|
|
|
my @group; |
261
|
|
|
|
|
|
|
for my $tag (keys %{$self->{'inittab'}{'group'}}) |
262
|
|
|
|
|
|
|
{ |
263
|
|
|
|
|
|
|
my $group = $self->{'inittab'}{'group'}{$tag}; |
264
|
|
|
|
|
|
|
push @group, $group unless grep /^$group$/, @group; |
265
|
|
|
|
|
|
|
} |
266
|
|
|
|
|
|
|
# add the groups in status, just in case |
267
|
|
|
|
|
|
|
for my $group (keys %{$self->{'status'}}) |
268
|
|
|
|
|
|
|
{ |
269
|
|
|
|
|
|
|
push @group, $group unless grep /^$group$/, @group; |
270
|
|
|
|
|
|
|
} |
271
|
|
|
|
|
|
|
my $id = rand(); |
272
|
|
|
|
|
|
|
open(STATUS,">$self->{'initstat'}") || die $!; |
273
|
|
|
|
|
|
|
print STATUS "!startid $id\n"; |
274
|
|
|
|
|
|
|
# for my $group (keys %{$self->{'status'}}) |
275
|
|
|
|
|
|
|
for my $group (sort @group) |
276
|
|
|
|
|
|
|
{ |
277
|
|
|
|
|
|
|
next if $group eq "NULL"; |
278
|
|
|
|
|
|
|
debug "storing status for $group\n"; |
279
|
|
|
|
|
|
|
my $state = $self->{'status'}{$group}{'state'} || "stopped"; |
280
|
|
|
|
|
|
|
my $level = $self->{'status'}{$group}{'level'} || ""; |
281
|
|
|
|
|
|
|
printf STATUS ("%-15s %-15s %-15s\n", $group, $state, $level); |
282
|
|
|
|
|
|
|
} |
283
|
|
|
|
|
|
|
print STATUS "!endid $id\n"; |
284
|
|
|
|
|
|
|
# print STATUS dump($self); |
285
|
|
|
|
|
|
|
close STATUS; |
286
|
|
|
|
|
|
|
} |
287
|
|
|
|
|
|
|
|
288
|
|
|
|
|
|
|
sub _stopall |
289
|
|
|
|
|
|
|
{ |
290
|
|
|
|
|
|
|
my $self=shift; |
291
|
|
|
|
|
|
|
for my $group (keys %{$self->{'status'}}) |
292
|
|
|
|
|
|
|
{ |
293
|
|
|
|
|
|
|
$self->_status($group,'',"stopping"); |
294
|
|
|
|
|
|
|
} |
295
|
|
|
|
|
|
|
for my $tag (keys %{$self->{'pid'}}) |
296
|
|
|
|
|
|
|
{ |
297
|
|
|
|
|
|
|
$self->_kill($tag); |
298
|
|
|
|
|
|
|
} |
299
|
|
|
|
|
|
|
for my $group (keys %{$self->{'status'}}) |
300
|
|
|
|
|
|
|
{ |
301
|
|
|
|
|
|
|
$self->_status($group,'',"stopped"); |
302
|
|
|
|
|
|
|
} |
303
|
|
|
|
|
|
|
exit(0); |
304
|
|
|
|
|
|
|
} |
305
|
|
|
|
|
|
|
|
306
|
|
|
|
|
|
|
sub _config |
307
|
|
|
|
|
|
|
{ |
308
|
|
|
|
|
|
|
my $self=shift; |
309
|
|
|
|
|
|
|
$self->{'inittab'}={}; |
310
|
|
|
|
|
|
|
open(INITTAB,"<$self->{'config'}") || die $!; |
311
|
|
|
|
|
|
|
while() |
312
|
|
|
|
|
|
|
{ |
313
|
|
|
|
|
|
|
next if /^#/; |
314
|
|
|
|
|
|
|
next if /^\s*$/; |
315
|
|
|
|
|
|
|
chomp; |
316
|
|
|
|
|
|
|
my ($group,$tag,$level,$mode,$cmd) = split(':',$_,5); |
317
|
|
|
|
|
|
|
debug "inittab $group|$tag|$level|$mode|$cmd\n"; |
318
|
|
|
|
|
|
|
if ($mode eq "socket") |
319
|
|
|
|
|
|
|
{ |
320
|
|
|
|
|
|
|
$self->{'socket'} = $cmd; |
321
|
|
|
|
|
|
|
next; |
322
|
|
|
|
|
|
|
} |
323
|
|
|
|
|
|
|
if ($mode eq "initstat") |
324
|
|
|
|
|
|
|
{ |
325
|
|
|
|
|
|
|
$self->{'initstat'} = $cmd; |
326
|
|
|
|
|
|
|
next; |
327
|
|
|
|
|
|
|
} |
328
|
|
|
|
|
|
|
next if /^:::/; |
329
|
|
|
|
|
|
|
$self->{'inittab'}{'group'}{$tag} = $group; |
330
|
|
|
|
|
|
|
my @level; |
331
|
|
|
|
|
|
|
if ($level =~/,/) |
332
|
|
|
|
|
|
|
{ |
333
|
|
|
|
|
|
|
@level = split(',',$level); |
334
|
|
|
|
|
|
|
debug dump(@level). "\n"; |
335
|
|
|
|
|
|
|
} |
336
|
|
|
|
|
|
|
else |
337
|
|
|
|
|
|
|
{ |
338
|
|
|
|
|
|
|
@level = split('',$level); |
339
|
|
|
|
|
|
|
} |
340
|
|
|
|
|
|
|
debug "final levels @level\n"; |
341
|
|
|
|
|
|
|
$self->{'inittab'}{'levels'}{$tag} = \@level; |
342
|
|
|
|
|
|
|
$self->{'inittab'}{'mode'}{$tag} = $mode; |
343
|
|
|
|
|
|
|
$self->{'inittab'}{'cmd'}{$tag} = $cmd; |
344
|
|
|
|
|
|
|
} |
345
|
|
|
|
|
|
|
} |
346
|
|
|
|
|
|
|
|
347
|
|
|
|
|
|
|
# starts and stops processes according to new runlevel |
348
|
|
|
|
|
|
|
sub _spawn |
349
|
|
|
|
|
|
|
{ |
350
|
|
|
|
|
|
|
my ($self,$newgroup,$newlevel)=@_; |
351
|
|
|
|
|
|
|
($newgroup,$newlevel)=($self->{'group'},$self->{'level'}) |
352
|
|
|
|
|
|
|
unless $newgroup && ($newlevel || (defined($newlevel) && $newlevel == 0)); |
353
|
|
|
|
|
|
|
($self->{'group'},$self->{'level'}) = ($newgroup,$newlevel); |
354
|
|
|
|
|
|
|
$self->_status($newgroup,$newlevel,"start"); |
355
|
|
|
|
|
|
|
$self->_config(); |
356
|
|
|
|
|
|
|
my @activetags; |
357
|
|
|
|
|
|
|
my $testres=""; |
358
|
|
|
|
|
|
|
for my $tag (keys %{$self->{'inittab'}{'group'}}) |
359
|
|
|
|
|
|
|
{ |
360
|
|
|
|
|
|
|
debug "checking $tag\n"; |
361
|
|
|
|
|
|
|
my $group=$self->{'inittab'}{'group'}{$tag}; |
362
|
|
|
|
|
|
|
my @level=@{$self->{'inittab'}{'levels'}{$tag}}; |
363
|
|
|
|
|
|
|
my $mode=$self->{'inittab'}{'mode'}{$tag}; |
364
|
|
|
|
|
|
|
my $cmd=$self->{'inittab'}{'cmd'}{$tag}; |
365
|
|
|
|
|
|
|
next if $mode eq "off"; |
366
|
|
|
|
|
|
|
push @activetags, $tag; |
367
|
|
|
|
|
|
|
next unless $group eq $newgroup; |
368
|
|
|
|
|
|
|
|
369
|
|
|
|
|
|
|
debug "$group $tag has levels @level\n"; |
370
|
|
|
|
|
|
|
|
371
|
|
|
|
|
|
|
# if this line is for our newly commanded runlevel |
372
|
|
|
|
|
|
|
if(grep /^$newlevel$/, @level) |
373
|
|
|
|
|
|
|
{ |
374
|
|
|
|
|
|
|
# start processes in new runlevel |
375
|
|
|
|
|
|
|
debug "starting $newgroup $newlevel\n"; |
376
|
|
|
|
|
|
|
|
377
|
|
|
|
|
|
|
# bail if already started in another runlevel |
378
|
|
|
|
|
|
|
next if $self->{'pid'}{$tag}; |
379
|
|
|
|
|
|
|
|
380
|
|
|
|
|
|
|
if ($mode eq "wait") |
381
|
|
|
|
|
|
|
{ |
382
|
|
|
|
|
|
|
# set a placeholder to keep us from running $tag again |
383
|
|
|
|
|
|
|
$self->{'pid'}{$tag} = "wait"; |
384
|
|
|
|
|
|
|
debug "wait system($cmd)\n"; |
385
|
|
|
|
|
|
|
# XXX process start |
386
|
|
|
|
|
|
|
system($cmd); |
387
|
|
|
|
|
|
|
next; |
388
|
|
|
|
|
|
|
} |
389
|
|
|
|
|
|
|
|
390
|
|
|
|
|
|
|
if ($mode eq "test") |
391
|
|
|
|
|
|
|
{ |
392
|
|
|
|
|
|
|
# set a placeholder to keep us from running $tag again |
393
|
|
|
|
|
|
|
$self->{'pid'}{$tag} = "test"; |
394
|
|
|
|
|
|
|
debug "test system($cmd)\n"; |
395
|
|
|
|
|
|
|
# XXX process start |
396
|
|
|
|
|
|
|
system($cmd); |
397
|
|
|
|
|
|
|
my $rc = $? >> 8; |
398
|
|
|
|
|
|
|
$testres = "fail" if $rc; |
399
|
|
|
|
|
|
|
next; |
400
|
|
|
|
|
|
|
} |
401
|
|
|
|
|
|
|
|
402
|
|
|
|
|
|
|
if ($mode eq "respawn") |
403
|
|
|
|
|
|
|
{ |
404
|
|
|
|
|
|
|
# start timing and counting |
405
|
|
|
|
|
|
|
$self->{'time'}{$tag}=time() unless $self->{'time'}{$tag}; |
406
|
|
|
|
|
|
|
$self->{'counter'}{$tag}=0 unless $self->{'counter'}{$tag}; |
407
|
|
|
|
|
|
|
if($self->{'time'}{$tag} < time() - 10) |
408
|
|
|
|
|
|
|
{ |
409
|
|
|
|
|
|
|
# it's been a while; restarting timing and counting |
410
|
|
|
|
|
|
|
$self->{'time'}{$tag}=time(); |
411
|
|
|
|
|
|
|
$self->{'counter'}{$tag}=0; |
412
|
|
|
|
|
|
|
} |
413
|
|
|
|
|
|
|
# skip this inittab entry if we're in jail |
414
|
|
|
|
|
|
|
next unless time() >= $self->{'time'}{$tag}; |
415
|
|
|
|
|
|
|
# let it respawn no more than 5 times in 10 seconds |
416
|
|
|
|
|
|
|
if ($self->{'counter'}{$tag} >= 5) |
417
|
|
|
|
|
|
|
{ |
418
|
|
|
|
|
|
|
warn "$0: $tag respawning too rapidly -- sleeping 60 seconds\n"; |
419
|
|
|
|
|
|
|
# go to jail |
420
|
|
|
|
|
|
|
$self->{'time'}{$tag}=time() + 60; |
421
|
|
|
|
|
|
|
$self->{'counter'}{$tag}=0; |
422
|
|
|
|
|
|
|
next; |
423
|
|
|
|
|
|
|
} |
424
|
|
|
|
|
|
|
$self->{'counter'}{$tag}++; |
425
|
|
|
|
|
|
|
} |
426
|
|
|
|
|
|
|
|
427
|
|
|
|
|
|
|
# we only get here if tag is respawn or once |
428
|
|
|
|
|
|
|
if (my $pid = fork()) |
429
|
|
|
|
|
|
|
{ |
430
|
|
|
|
|
|
|
# parent |
431
|
|
|
|
|
|
|
debug "$pid forked\n"; |
432
|
|
|
|
|
|
|
# build index so we can find pid from tag |
433
|
|
|
|
|
|
|
$self->{'pid'}{$tag} = $pid; |
434
|
|
|
|
|
|
|
# build reverse index so we can find tag from pid |
435
|
|
|
|
|
|
|
$self->{'tag'}{$self->{'pid'}{$tag}}=$tag; |
436
|
|
|
|
|
|
|
next; |
437
|
|
|
|
|
|
|
} |
438
|
|
|
|
|
|
|
# child |
439
|
|
|
|
|
|
|
# sleep 1; |
440
|
|
|
|
|
|
|
debug "exec $cmd\n"; |
441
|
|
|
|
|
|
|
# XXX process start |
442
|
|
|
|
|
|
|
exec($cmd); |
443
|
|
|
|
|
|
|
} |
444
|
|
|
|
|
|
|
else |
445
|
|
|
|
|
|
|
{ |
446
|
|
|
|
|
|
|
# stop processes in old runlevel |
447
|
|
|
|
|
|
|
next unless $self->{'pid'}{$tag}; |
448
|
|
|
|
|
|
|
$self->_kill($tag); |
449
|
|
|
|
|
|
|
} |
450
|
|
|
|
|
|
|
|
451
|
|
|
|
|
|
|
} |
452
|
|
|
|
|
|
|
|
453
|
|
|
|
|
|
|
# stop processes which are no longer in inittab |
454
|
|
|
|
|
|
|
for my $tag (keys %{$self->{'pid'}}) |
455
|
|
|
|
|
|
|
{ |
456
|
|
|
|
|
|
|
next if grep /^$tag$/, @activetags; |
457
|
|
|
|
|
|
|
$self->_kill($tag); |
458
|
|
|
|
|
|
|
} |
459
|
|
|
|
|
|
|
|
460
|
|
|
|
|
|
|
my $state = $testres || "run"; |
461
|
|
|
|
|
|
|
$self->_status($newgroup,$newlevel,$state); |
462
|
|
|
|
|
|
|
} |
463
|
|
|
|
|
|
|
|
464
|
|
|
|
|
|
|
sub _kill |
465
|
|
|
|
|
|
|
{ |
466
|
|
|
|
|
|
|
my $self = shift; |
467
|
|
|
|
|
|
|
my $tag = shift; |
468
|
|
|
|
|
|
|
if |
469
|
|
|
|
|
|
|
( |
470
|
|
|
|
|
|
|
$self->{'pid'}{$tag} eq "wait" || |
471
|
|
|
|
|
|
|
$self->{'pid'}{$tag} eq "test" |
472
|
|
|
|
|
|
|
) |
473
|
|
|
|
|
|
|
{ |
474
|
|
|
|
|
|
|
delete $self->{'pid'}{$tag}; |
475
|
|
|
|
|
|
|
return; |
476
|
|
|
|
|
|
|
} |
477
|
|
|
|
|
|
|
return unless $self->{'pid'}{$tag}; |
478
|
|
|
|
|
|
|
debug "killing $self->{'pid'}{$tag}\n"; |
479
|
|
|
|
|
|
|
# XXX process kill start |
480
|
|
|
|
|
|
|
kill(15,$self->{'pid'}{$tag}); |
481
|
|
|
|
|
|
|
for(my $i=1;$i <= 16; $i*=2) |
482
|
|
|
|
|
|
|
{ |
483
|
|
|
|
|
|
|
last unless $self->{'pid'}{$tag}; |
484
|
|
|
|
|
|
|
last unless kill(0,$self->{'pid'}{$tag}); |
485
|
|
|
|
|
|
|
sleep $i; |
486
|
|
|
|
|
|
|
} |
487
|
|
|
|
|
|
|
return unless $self->{'pid'}{$tag}; |
488
|
|
|
|
|
|
|
while(kill(0,$self->{'pid'}{$tag})) |
489
|
|
|
|
|
|
|
{ |
490
|
|
|
|
|
|
|
# XXX process kill hard |
491
|
|
|
|
|
|
|
debug "hard kill $self->{'pid'}{$tag}\n"; |
492
|
|
|
|
|
|
|
kill(9,$self->{'pid'}{$tag}); |
493
|
|
|
|
|
|
|
} |
494
|
|
|
|
|
|
|
# XXX process kill done |
495
|
|
|
|
|
|
|
debug "killed $self->{'pid'}{$tag}\n"; |
496
|
|
|
|
|
|
|
|
497
|
|
|
|
|
|
|
delete $self->{'pid'}{$tag}; |
498
|
|
|
|
|
|
|
} |
499
|
|
|
|
|
|
|
|
500
|
|
|
|
|
|
|
sub _sigchld |
501
|
|
|
|
|
|
|
{ |
502
|
|
|
|
|
|
|
my $self=shift; |
503
|
|
|
|
|
|
|
my $pid = waitpid(-1, &WNOHANG); |
504
|
|
|
|
|
|
|
if ($pid == -1) |
505
|
|
|
|
|
|
|
{ |
506
|
|
|
|
|
|
|
# nothing exited -- ignore |
507
|
|
|
|
|
|
|
$SIG{CHLD} = sub {$self->_sigchld()}; |
508
|
|
|
|
|
|
|
return; |
509
|
|
|
|
|
|
|
} |
510
|
|
|
|
|
|
|
unless (kill(0,$pid) == 0) |
511
|
|
|
|
|
|
|
{ |
512
|
|
|
|
|
|
|
# still running -- false alarm |
513
|
|
|
|
|
|
|
$SIG{CHLD} = sub {$self->_sigchld()}; |
514
|
|
|
|
|
|
|
return; |
515
|
|
|
|
|
|
|
} |
516
|
|
|
|
|
|
|
# $pid exited |
517
|
|
|
|
|
|
|
debug "$pid exited\n"; |
518
|
|
|
|
|
|
|
# XXX pid exited (do we get here for every kill? what about system()?) |
519
|
|
|
|
|
|
|
my $tag = $self->{'tag'}{$pid}; |
520
|
|
|
|
|
|
|
# why not just always delete $self->{'pid'}{$tag} here? |
521
|
|
|
|
|
|
|
delete $self->{'pid'}{$tag} if $self->{'inittab'}{'mode'}{$tag} eq 'respawn'; |
522
|
|
|
|
|
|
|
# reread isinittab |
523
|
|
|
|
|
|
|
$self->_spawn(); |
524
|
|
|
|
|
|
|
$SIG{CHLD} = sub {$self->_sigchld()}; |
525
|
|
|
|
|
|
|
} |
526
|
|
|
|
|
|
|
|
527
|
|
|
|
|
|
|
=head1 BUGS |
528
|
|
|
|
|
|
|
|
529
|
|
|
|
|
|
|
=head1 AUTHOR |
530
|
|
|
|
|
|
|
|
531
|
|
|
|
|
|
|
Steve Traugott |
532
|
|
|
|
|
|
|
CPAN ID: STEVEGT |
533
|
|
|
|
|
|
|
stevegt@TerraLuna.Org |
534
|
|
|
|
|
|
|
http://www.stevegt.com |
535
|
|
|
|
|
|
|
|
536
|
|
|
|
|
|
|
=head1 COPYRIGHT |
537
|
|
|
|
|
|
|
|
538
|
|
|
|
|
|
|
Copyright (c) 2001 Steve Traugott. All rights reserved. |
539
|
|
|
|
|
|
|
This program is free software; you can redistribute |
540
|
|
|
|
|
|
|
it and/or modify it under the same terms as Perl itself. |
541
|
|
|
|
|
|
|
|
542
|
|
|
|
|
|
|
The full text of the license can be found in the |
543
|
|
|
|
|
|
|
LICENSE file included with this module. |
544
|
|
|
|
|
|
|
|
545
|
|
|
|
|
|
|
=head1 SEE ALSO |
546
|
|
|
|
|
|
|
|
547
|
|
|
|
|
|
|
perl(1). |
548
|
|
|
|
|
|
|
|
549
|
|
|
|
|
|
|
=cut |
550
|
|
|
|
|
|
|
|
551
|
|
|
|
|
|
|
1; #this line is important and will help the module return a true value |
552
|
|
|
|
|
|
|
|
553
|
|
|
|
|
|
|
__END__ |