line |
stmt |
bran |
cond |
sub |
pod |
time |
code |
1
|
|
|
|
|
|
|
# See copyright, etc in below POD section. |
2
|
|
|
|
|
|
|
###################################################################### |
3
|
|
|
|
|
|
|
|
4
|
|
|
|
|
|
|
package IPC::PidStat::PidServer; |
5
|
|
|
|
|
|
|
require 5.004; |
6
|
|
|
|
|
|
|
require Exporter; |
7
|
|
|
|
|
|
|
@ISA = qw(Exporter); |
8
|
|
|
|
|
|
|
|
9
|
1
|
|
|
1
|
|
421
|
use IPC::Locker; |
|
1
|
|
|
|
|
2
|
|
|
1
|
|
|
|
|
32
|
|
10
|
1
|
|
|
1
|
|
4
|
use Socket; |
|
1
|
|
|
|
|
1
|
|
|
1
|
|
|
|
|
361
|
|
11
|
1
|
|
|
1
|
|
5
|
use IO::Socket; |
|
1
|
|
|
|
|
1
|
|
|
1
|
|
|
|
|
5
|
|
12
|
|
|
|
|
|
|
|
13
|
1
|
|
|
1
|
|
669
|
use strict; |
|
1
|
|
|
|
|
1
|
|
|
1
|
|
|
|
|
29
|
|
14
|
1
|
|
|
1
|
|
5
|
use vars qw($VERSION $Debug $Hostname); |
|
1
|
|
|
|
|
1
|
|
|
1
|
|
|
|
|
38
|
|
15
|
1
|
|
|
1
|
|
4
|
use Carp; |
|
1
|
|
|
|
|
1
|
|
|
1
|
|
|
|
|
429
|
|
16
|
|
|
|
|
|
|
|
17
|
|
|
|
|
|
|
###################################################################### |
18
|
|
|
|
|
|
|
#### Configuration Section |
19
|
|
|
|
|
|
|
|
20
|
|
|
|
|
|
|
# Other configurable settings. |
21
|
|
|
|
|
|
|
$Debug = 0; |
22
|
|
|
|
|
|
|
|
23
|
|
|
|
|
|
|
$VERSION = '1.502'; |
24
|
|
|
|
|
|
|
|
25
|
|
|
|
|
|
|
$Hostname = IPC::Locker::hostfqdn(); |
26
|
|
|
|
|
|
|
|
27
|
|
|
|
|
|
|
###################################################################### |
28
|
|
|
|
|
|
|
#### Creator |
29
|
|
|
|
|
|
|
|
30
|
|
|
|
|
|
|
sub new { |
31
|
|
|
|
|
|
|
# Establish the server |
32
|
0
|
0
|
|
0
|
1
|
|
@_ >= 1 or croak 'usage: IPC::PidStat::PidServer->new ({options})'; |
33
|
0
|
|
|
|
|
|
my $proto = shift; |
34
|
0
|
|
0
|
|
|
|
my $class = ref($proto) || $proto; |
35
|
0
|
|
|
|
|
|
my $self = { |
36
|
|
|
|
|
|
|
#Documented |
37
|
|
|
|
|
|
|
port=>$IPC::Locker::Default_PidStat_Port, |
38
|
|
|
|
|
|
|
@_,}; |
39
|
0
|
|
|
|
|
|
bless $self, $class; |
40
|
0
|
|
|
|
|
|
return $self; |
41
|
|
|
|
|
|
|
} |
42
|
|
|
|
|
|
|
|
43
|
|
|
|
|
|
|
sub start_server { |
44
|
0
|
|
|
0
|
1
|
|
my $self = shift; |
45
|
|
|
|
|
|
|
|
46
|
|
|
|
|
|
|
# Open the socket |
47
|
0
|
0
|
|
|
|
|
print "Listening on $self->{port}\n" if $Debug; |
48
|
|
|
|
|
|
|
my $server = IO::Socket::INET->new( Proto => 'udp', |
49
|
|
|
|
|
|
|
LocalPort => $self->{port}, |
50
|
0
|
0
|
|
|
|
|
Reuse => 1) |
51
|
|
|
|
|
|
|
or die "$0: Error, socket: $!"; |
52
|
|
|
|
|
|
|
|
53
|
0
|
|
|
|
|
|
while (1) { |
54
|
0
|
|
|
|
|
|
my $in_msg; |
55
|
0
|
0
|
|
|
|
|
next unless $server->recv($in_msg, 8192); |
56
|
0
|
0
|
|
|
|
|
print "Got msg $in_msg\n" if $Debug; |
57
|
0
|
|
|
|
|
|
my ($cmd,@param) = split /\s+/, $in_msg; # We rely on the newline to terminate the split |
58
|
|
|
|
|
|
|
# We ignore unknown parameters for forward compatibility |
59
|
|
|
|
|
|
|
# PIDR (\d+) (\S+) ([0-7]) # PID request, format after 1.480 |
60
|
|
|
|
|
|
|
# PIDR (\d+) (\S+) # PID request, format after 1.461 |
61
|
|
|
|
|
|
|
# PIDR (\d+) # PID request, format before 1.461 |
62
|
0
|
0
|
|
|
|
|
if ($cmd eq 'PIDR') { |
63
|
0
|
|
|
|
|
|
my $pid = $param[0]; |
64
|
0
|
|
0
|
|
|
|
my $host = $param[1] || $Hostname; # Loop the host through, as the machine may have multiple names |
65
|
0
|
|
0
|
|
|
|
my $which = $param[2] || 3; |
66
|
0
|
|
|
|
|
|
$! = undef; |
67
|
0
|
|
|
|
|
|
my $exists = IPC::PidStat::local_pid_exists($pid); |
68
|
0
|
0
|
|
|
|
|
if ($exists) { |
|
|
0
|
|
|
|
|
|
69
|
0
|
0
|
|
|
|
|
if ($which & 1) { |
70
|
0
|
|
|
|
|
|
my $out_msg = "EXIS $pid $exists $host"; # PID response |
71
|
0
|
0
|
|
|
|
|
print " Send msg $out_msg\n" if $Debug; |
72
|
0
|
|
|
|
|
|
$server->send($out_msg); # or die... But we'll ignore errors |
73
|
|
|
|
|
|
|
} |
74
|
|
|
|
|
|
|
} elsif (defined $exists) { # Known not to exist |
75
|
0
|
0
|
|
|
|
|
if ($which & 2) { |
76
|
0
|
|
|
|
|
|
my $out_msg = "EXIS $pid $exists $host"; # PID response |
77
|
0
|
0
|
|
|
|
|
print " Send msg $out_msg\n" if $Debug; |
78
|
0
|
|
|
|
|
|
$server->send($out_msg); # or die... But we'll ignore errors |
79
|
|
|
|
|
|
|
} |
80
|
|
|
|
|
|
|
} else { # Perhaps we're not running as root? |
81
|
0
|
0
|
|
|
|
|
if ($which & 4) { |
82
|
0
|
|
|
|
|
|
my $out_msg = "UNKN $pid na $host"; # PID response |
83
|
0
|
0
|
|
|
|
|
print " Send msg $out_msg\n" if $Debug; |
84
|
0
|
|
|
|
|
|
$server->send($out_msg); # or die... But we'll ignore errors |
85
|
|
|
|
|
|
|
} |
86
|
|
|
|
|
|
|
} |
87
|
|
|
|
|
|
|
} |
88
|
|
|
|
|
|
|
} |
89
|
|
|
|
|
|
|
} |
90
|
|
|
|
|
|
|
|
91
|
|
|
|
|
|
|
###################################################################### |
92
|
|
|
|
|
|
|
#### Package return |
93
|
|
|
|
|
|
|
1; |
94
|
|
|
|
|
|
|
=pod |
95
|
|
|
|
|
|
|
|
96
|
|
|
|
|
|
|
=head1 NAME |
97
|
|
|
|
|
|
|
|
98
|
|
|
|
|
|
|
IPC::PidStat::PidServer - Process ID existence server |
99
|
|
|
|
|
|
|
|
100
|
|
|
|
|
|
|
=head1 SYNOPSIS |
101
|
|
|
|
|
|
|
|
102
|
|
|
|
|
|
|
use IPC::PidStat::PidServer; |
103
|
|
|
|
|
|
|
|
104
|
|
|
|
|
|
|
IPC::PidStat::PidServer->new(port=>1234)->start_server; |
105
|
|
|
|
|
|
|
|
106
|
|
|
|
|
|
|
# Or more typically via the command line |
107
|
|
|
|
|
|
|
pidstatd |
108
|
|
|
|
|
|
|
|
109
|
|
|
|
|
|
|
=head1 DESCRIPTION |
110
|
|
|
|
|
|
|
|
111
|
|
|
|
|
|
|
L responds to UDP requests that contain a PID with |
112
|
|
|
|
|
|
|
a packet indicating the PID and if the PID currently exists. |
113
|
|
|
|
|
|
|
|
114
|
|
|
|
|
|
|
The Perl IPC::Locker package optionally uses this daemon to break locks |
115
|
|
|
|
|
|
|
for PIDs that no longer exists. |
116
|
|
|
|
|
|
|
|
117
|
|
|
|
|
|
|
=over 4 |
118
|
|
|
|
|
|
|
|
119
|
|
|
|
|
|
|
=item new ([parameter=>value ...]); |
120
|
|
|
|
|
|
|
|
121
|
|
|
|
|
|
|
Creates a server object. |
122
|
|
|
|
|
|
|
|
123
|
|
|
|
|
|
|
=item start_server ([parameter=>value ...]); |
124
|
|
|
|
|
|
|
|
125
|
|
|
|
|
|
|
Starts the server. Does not return. |
126
|
|
|
|
|
|
|
|
127
|
|
|
|
|
|
|
=back |
128
|
|
|
|
|
|
|
|
129
|
|
|
|
|
|
|
=head1 PARAMETERS |
130
|
|
|
|
|
|
|
|
131
|
|
|
|
|
|
|
=over 4 |
132
|
|
|
|
|
|
|
|
133
|
|
|
|
|
|
|
=item port |
134
|
|
|
|
|
|
|
|
135
|
|
|
|
|
|
|
The port number (INET) or name (UNIX) of the lock server. Defaults to |
136
|
|
|
|
|
|
|
'pidstatd' looked up via /etc/services, else 1752. |
137
|
|
|
|
|
|
|
|
138
|
|
|
|
|
|
|
=back |
139
|
|
|
|
|
|
|
|
140
|
|
|
|
|
|
|
=head1 DISTRIBUTION |
141
|
|
|
|
|
|
|
|
142
|
|
|
|
|
|
|
The latest version is available from CPAN and from L. |
143
|
|
|
|
|
|
|
|
144
|
|
|
|
|
|
|
Copyright 2002-2022 by Wilson Snyder. This package is free software; you |
145
|
|
|
|
|
|
|
can redistribute it and/or modify it under the terms of either the GNU |
146
|
|
|
|
|
|
|
Lesser General Public License Version 3 or the Perl Artistic License Version 2.0. |
147
|
|
|
|
|
|
|
|
148
|
|
|
|
|
|
|
=head1 AUTHORS |
149
|
|
|
|
|
|
|
|
150
|
|
|
|
|
|
|
Wilson Snyder |
151
|
|
|
|
|
|
|
|
152
|
|
|
|
|
|
|
=head1 SEE ALSO |
153
|
|
|
|
|
|
|
|
154
|
|
|
|
|
|
|
L, L, L |
155
|
|
|
|
|
|
|
|
156
|
|
|
|
|
|
|
=cut |
157
|
|
|
|
|
|
|
|
158
|
|
|
|
|
|
|
###################################################################### |