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package Sub::Daemon; |
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3
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=head1 NAME |
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5
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Sub::Daemon - base class for a daemons |
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7
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=cut |
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8
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9
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3
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3
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140546
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use 5.014; |
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3
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31
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10
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11
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our $VERSION = '0.04'; |
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13
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3
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3
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18
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use base 'Class::Accessor'; |
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5
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3
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1785
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14
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__PACKAGE__->mk_ro_accessors( qw( pid log logdir piddir logfile pidfile debug loglevel) ); |
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16
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3
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3
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8975
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use AnyEvent; |
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3
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17098
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3
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126
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17
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3
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3
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1877
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use POSIX ":sys_wait_h"; |
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3
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20207
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3
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19
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18
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3
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3
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6115
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use File::Pid; |
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3
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10612
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3
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25
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19
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3
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3
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1578
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use Sub::Daemon::Log; |
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3
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9
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3
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85
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20
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3
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3
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1567
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use FindBin; |
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3
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3420
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3
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129
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21
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3
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3
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22
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use Carp; |
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3
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8
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3
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4865
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23
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24
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sub new { |
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2
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2
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1
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216
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my $class = shift; |
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26
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2
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16
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my %opts = ( |
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27
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'logdir' => './', |
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28
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'piddir' => './', |
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29
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'logfile' => undef, |
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30
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'pidfile' => undef, |
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31
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'debug' => 0, |
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32
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'loglevel' => 'info', |
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33
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@_, |
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34
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); |
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35
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36
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2
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6
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my $logfile = $opts{ 'logfile' }; |
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37
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2
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4
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my $pidfile = $opts{ 'pidfile' }; |
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38
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39
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2
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50
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33
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10
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unless ($logfile && $pidfile) { |
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40
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2
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4
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my $filename = $0; |
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41
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2
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12
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$filename =~ s/^.*\///; |
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42
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2
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33
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16
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$logfile ||= $filename . '.log'; |
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43
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2
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33
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12
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$pidfile ||= $filename . '.pid'; |
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44
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} |
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45
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46
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2
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12
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my $self = bless { |
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47
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%opts, |
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48
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'logfile' => $logfile, |
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49
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'pidfile' => $pidfile, |
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50
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}, $class; |
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51
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52
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2
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12
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$self->pid_check(); |
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53
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2
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10
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$self->init_log(); |
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54
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55
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2
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8
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return $self; |
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56
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} |
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57
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58
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=head2 _fork |
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59
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60
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Fork with dances |
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61
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62
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Return: |
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63
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pid of child process - for parent |
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64
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0 - for a child process |
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65
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66
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=cut |
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67
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68
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sub _fork { |
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69
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2
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2
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4
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my $self = shift; |
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70
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71
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2
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4
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my $pid; |
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72
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2
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4
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my $loop = 0; |
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73
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74
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FORK: { |
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75
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2
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50
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4
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if( defined( $pid = fork ) ) { |
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2
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2181
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76
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2
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201
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return $pid; |
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77
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} |
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78
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79
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# EAGAIN - fork cannot allocate sufficient memory to copy the parent's |
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80
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# page tables and allocate a task structure for the child. |
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81
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# ENOMEM - fork failed to allocate the necessary kernel structures |
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82
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# because memory is tight. |
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83
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# Last the loop after 30 seconds |
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84
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0
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0
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0
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0
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if ( $loop < 6 && ( $! == POSIX::EAGAIN() || $! == POSIX::ENOMEM() ) ) { |
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0
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85
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0
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0
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$loop++; sleep 5; redo FORK; |
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0
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0
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0
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0
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86
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} |
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87
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} |
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88
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89
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0
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0
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confess "Can't fork: $!"; |
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90
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} |
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91
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92
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=head2 _daemonize |
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93
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94
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Daemonize of process. |
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95
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Forks, closes STDIN/STDOUT/STDERR.... |
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96
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97
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=cut |
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98
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99
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sub _daemonize { |
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100
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2
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2
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1024
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my $self = shift; |
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101
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2
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12
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my %opts = ( |
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102
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'pid' => undef, |
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103
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'debug' => undef, |
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104
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@_, |
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105
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); |
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106
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107
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2
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33
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10
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my $debug = $opts{'debug'} // $self->debug; |
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108
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109
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2
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50
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14
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return $self->pid_write() if $debug; |
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110
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0
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0
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0
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if (my $pid = $self->pid_check()) { |
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111
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0
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0
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die "Already running: $pid\n" ; |
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112
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} |
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113
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114
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# Демонизируемся |
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115
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# Первый fork |
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116
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0
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0
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my $pid = $self->_fork(); |
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117
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0
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0
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0
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if( $pid ) { |
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118
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0
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0
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waitpid $pid, 0; |
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119
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0
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0
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exit; |
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120
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} |
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121
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122
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0
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0
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0
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die "Can't to $FindBin::Bin/script: $!" unless chdir $FindBin::Bin; |
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123
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0
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0
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umask 0; |
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124
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0
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0
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0
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die "Cannot detach from controlling terminal" if POSIX::setsid() < 0; |
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125
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# Второй fork |
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126
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0
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0
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$pid = $self->_fork; |
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127
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0
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0
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0
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exit if $pid; |
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128
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129
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0
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0
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say "Daemon started. PID=$$"; |
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130
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131
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# Закрываем все открытые файлы |
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132
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0
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0
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0
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my $openmax = POSIX::sysconf( &POSIX::_SC_OPEN_MAX ) // 64; |
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133
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0
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0
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0
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$openmax = 64 if $openmax < 0; |
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134
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0
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0
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POSIX::close $_ for( 0 .. $openmax ); |
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135
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# Переоткрываем стандартные потоки |
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136
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0
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0
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open \*STDIN, "
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137
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0
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0
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open \*STDOUT, ">/dev/null"; |
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138
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0
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0
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open \*STDERR, ">/dev/null"; |
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139
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0
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0
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$self->init_log(); # открываем лог еще раз, т.к. он был закрыт в "POSIX::close ... " |
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140
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0
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0
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$self->pid_write(); |
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141
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0
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0
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return; |
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142
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} |
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143
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144
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=head2 pid_write |
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145
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146
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Write pid-file |
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147
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148
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=cut |
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149
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150
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sub pid_write { |
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151
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2
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2
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1
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4
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my $self = shift; |
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152
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153
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2
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8
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my $pidfile = $self->piddir . $self->pidfile; |
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154
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2
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48
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my $pid = File::Pid->new({ |
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155
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'file' => $pidfile, |
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156
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'pid' => $$, |
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157
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}); |
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158
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2
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50
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226
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if( -f -s $pidfile ) { |
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159
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0
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0
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0
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if ( my $num = $pid->running ) { |
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160
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0
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0
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die "Already running: $num\n"; |
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161
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} |
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162
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} |
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163
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164
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2
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10
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$self->{'pid'} = $pid; |
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165
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166
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2
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50
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10
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$pid->write or die "Couldnt write pid $pidfile"; |
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167
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168
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2
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564
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return; |
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169
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} |
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170
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171
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=head2 pid_check |
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172
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173
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Checking, may by this daemon runned early |
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174
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175
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=cut |
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176
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177
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sub pid_check { |
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178
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2
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2
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1
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4
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my $self = shift; |
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179
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180
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2
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14
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my $pidfile = $self->piddir . $self->pidfile; |
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181
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2
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|
96
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my $pid = File::Pid->new({ |
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182
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'file' => $pidfile, |
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183
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'pid' => $$, |
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184
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}); |
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185
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186
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2
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50
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|
330
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return $pid->running if -f -s $pidfile; |
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187
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2
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24
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return; |
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188
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} |
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189
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|
190
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=head2 pid_remove |
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191
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192
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Remove pid-file |
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193
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194
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=cut |
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195
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196
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sub pid_remove { |
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197
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0
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0
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1
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0
|
my $self = shift; |
|
198
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0
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|
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|
0
|
return $self->pid->remove; |
|
199
|
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|
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} |
|
200
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201
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=head2 init_log |
|
202
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203
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Init log. |
|
204
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205
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=cut |
|
206
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207
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|
|
sub init_log { |
|
208
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2
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|
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2
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1
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4
|
my $self = shift; |
|
209
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|
#my $filename = $ENV{LOG_DIR} . '/' . $self->logfile unless $self->debug; |
|
210
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|
#$self->{ 'log' } = Rept::Log->new( 'path' => $filename ); |
|
211
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2
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50
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10
|
if ($self->debug) { |
|
212
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0
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0
|
$self->{log} = Sub::Daemon::Log->new(level => $self->loglevel()); |
|
213
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|
|
} else { |
|
214
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2
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|
30
|
$self->{log} = Sub::Daemon::Log->new(level => $self->loglevel(),path => $self->logdir() . $self->logfile); |
|
215
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|
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|
|
} |
|
216
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217
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|
|
$SIG{ '__WARN__' } = sub { |
|
218
|
3
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|
|
3
|
|
3000465
|
my $msg = $_[0]; |
|
219
|
3
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|
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|
23
|
chomp $msg; |
|
220
|
3
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|
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|
40
|
$self->log->warn($msg); |
|
221
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2
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|
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|
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16
|
}; |
|
222
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223
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2
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|
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|
6
|
return; |
|
224
|
|
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|
|
} |
|
225
|
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226
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|
=head2 spawn( |
|
227
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|
228
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|
|
Start child worker proccess. Control of work |
|
229
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|
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|
230
|
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|
|
Params: |
|
231
|
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|
232
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|
|
nproc - Number of childs process. Be default: 1 |
|
233
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|
|
code - CODE REF of child process |
|
234
|
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|
235
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|
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|
|
=cut |
|
236
|
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|
237
|
|
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|
|
sub spawn { |
|
238
|
2
|
|
|
2
|
1
|
9588
|
my $self = shift; |
|
239
|
2
|
|
|
|
|
12
|
my %opts = ( |
|
240
|
|
|
|
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|
|
'nproc' => 1, |
|
241
|
|
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|
|
'code' => undef, |
|
242
|
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|
|
@_, |
|
243
|
|
|
|
|
|
|
); |
|
244
|
|
|
|
|
|
|
|
|
245
|
2
|
|
|
|
|
10
|
$self->log->info("Daemon spawning"); |
|
246
|
|
|
|
|
|
|
|
|
247
|
2
|
50
|
|
|
|
14
|
my $nproc = $opts{ 'nproc' } or confess 'number of child process is not specified'; |
|
248
|
2
|
50
|
|
|
|
8
|
my $code = $opts{ 'code' } or confess 'child code is not specified'; |
|
249
|
2
|
50
|
|
|
|
12
|
confess 'code must be CODE reference' unless ref $code eq 'CODE'; |
|
250
|
|
|
|
|
|
|
|
|
251
|
|
|
|
|
|
|
# Хэш пидов рабочих процессов |
|
252
|
2
|
|
|
|
|
4
|
my %childs = (); |
|
253
|
|
|
|
|
|
|
|
|
254
|
2
|
|
|
|
|
62
|
my $cv = AE::cv; |
|
255
|
|
|
|
|
|
|
|
|
256
|
|
|
|
|
|
|
# Перехват сигналов INT и TERM |
|
257
|
|
|
|
|
|
|
# При их получении будет остановлен цикл выполнения, |
|
258
|
|
|
|
|
|
|
# а всем рабочим процессам будет отправлен сигнал TERM |
|
259
|
2
|
|
|
1
|
|
408
|
$SIG{$_} = sub { $cv->send(); kill 'TERM' => keys %childs } for qw( TERM INT ); |
|
|
1
|
|
|
|
|
3002337
|
|
|
|
1
|
|
|
|
|
86
|
|
|
260
|
|
|
|
|
|
|
|
|
261
|
|
|
|
|
|
|
# флаг, указывающий, что это дочерний процесс. проставляется в дочернем процессе) |
|
262
|
|
|
|
|
|
|
# из-за ограничений AnyEvent, невозможно делать вызов $self->run_child() сразу из $start_child, |
|
263
|
|
|
|
|
|
|
# и приходится выносить его за $cv->recv. |
|
264
|
2
|
|
|
|
|
8
|
my $is_child = 0; |
|
265
|
|
|
|
|
|
|
|
|
266
|
|
|
|
|
|
|
# Подпрограмма запуска рабочего-дочернего процесса |
|
267
|
|
|
|
|
|
|
state $start_child = sub { |
|
268
|
2
|
100
|
|
2
|
|
8
|
if (my $pid = $self->_fork()) { |
|
269
|
|
|
|
|
|
|
# В родительском процессе: |
|
270
|
|
|
|
|
|
|
# просто сохраняем pid рабочего процесса, |
|
271
|
|
|
|
|
|
|
# и завершаем выполнение подпрограммы |
|
272
|
1
|
|
|
|
|
51
|
$childs{ $pid } = 1; |
|
273
|
1
|
|
|
|
|
47
|
return; |
|
274
|
|
|
|
|
|
|
} |
|
275
|
|
|
|
|
|
|
# В дочернем процессе: |
|
276
|
1
|
|
|
|
|
128
|
$cv->send; # Прерываем выполнение ожидания AE |
|
277
|
1
|
|
|
|
|
123
|
$is_child = 1; # Ставим флаг, что данный процесс - дочерний |
|
278
|
1
|
|
|
|
|
47
|
$self->log->info("Child process $$ started"); |
|
279
|
1
|
|
|
|
|
18
|
return 1; |
|
280
|
2
|
|
|
|
|
10
|
}; |
|
281
|
|
|
|
|
|
|
|
|
282
|
|
|
|
|
|
|
# callback, срабатывающий в основном процессе, |
|
283
|
|
|
|
|
|
|
# когда завершаются дочерние рабочие процессы |
|
284
|
|
|
|
|
|
|
my $c = AE::child 0 => sub { |
|
285
|
0
|
0
|
|
0
|
|
0
|
if (delete $childs{ $_[0] }) { |
|
286
|
0
|
|
|
|
|
0
|
$self->log->info("Child process $_[0] stopped"); |
|
287
|
|
|
|
|
|
|
# удаляем pid, |
|
288
|
|
|
|
|
|
|
# если это не полное завершение работы системы (цикл обработки AE еще не завершился), |
|
289
|
|
|
|
|
|
|
# значит рабочий процесса упал сам, и нужно его перезапустить |
|
290
|
0
|
0
|
|
|
|
0
|
$start_child->() unless $cv->ready; |
|
291
|
|
|
|
|
|
|
} |
|
292
|
2
|
|
|
|
|
50
|
}; |
|
293
|
|
|
|
|
|
|
|
|
294
|
|
|
|
|
|
|
# Обработчик сигнала HUP. |
|
295
|
|
|
|
|
|
|
my $hup = AE::signal HUP => sub { |
|
296
|
|
|
|
|
|
|
# Посылаем HUP всем дочерним процессам |
|
297
|
0
|
|
|
0
|
|
0
|
$self->log->info( 'Parent process fetch SIG HUP' ); |
|
298
|
0
|
|
|
|
|
0
|
$self->log->info( 'Send HUP to child processes' ); |
|
299
|
0
|
|
|
|
|
0
|
kill HUP => keys %childs; |
|
300
|
|
|
|
|
|
|
# Переоткрываем лог?? |
|
301
|
0
|
|
|
|
|
0
|
$self->log->info( 'Log reopening..' ); |
|
302
|
0
|
|
|
|
|
0
|
$self->log->reopen(); |
|
303
|
2
|
|
|
|
|
66
|
}; |
|
304
|
|
|
|
|
|
|
|
|
305
|
|
|
|
|
|
|
# Запускаем дочерние процессы |
|
306
|
|
|
|
|
|
|
# "&& last" нужен того, чтобы дочерний процесс мог выйти из цикла. |
|
307
|
2
|
|
100
|
|
|
14
|
$start_child->() && last for 1..$nproc; |
|
308
|
|
|
|
|
|
|
|
|
309
|
|
|
|
|
|
|
# запуск ожидания события AE |
|
310
|
2
|
|
|
|
|
147
|
$cv->recv; |
|
311
|
|
|
|
|
|
|
|
|
312
|
|
|
|
|
|
|
# если этот процесс - дочерний, начинаем обработку |
|
313
|
2
|
100
|
|
|
|
363
|
if ($is_child) { |
|
314
|
|
|
|
|
|
|
local $SIG{ 'HUP' } = sub { |
|
315
|
0
|
|
|
0
|
|
0
|
$self->log->info( 'Worker process fetch SIG HUP' ); |
|
316
|
0
|
|
|
|
|
0
|
$self->log->info( 'Log reopening..' ); |
|
317
|
0
|
|
|
|
|
0
|
$self->log->reopen(); |
|
318
|
1
|
|
|
|
|
111
|
}; |
|
319
|
1
|
|
|
|
|
21
|
$code->(); |
|
320
|
1
|
|
|
|
|
521
|
exit; |
|
321
|
|
|
|
|
|
|
} |
|
322
|
|
|
|
|
|
|
|
|
323
|
|
|
|
|
|
|
# Дожидаемся завершения оставшихся рабочих процессов |
|
324
|
1
|
|
|
|
|
26
|
$self->log->info("Waiting childs"); |
|
325
|
1
|
|
|
|
|
261200
|
waitpid($_, 0) for keys %childs; |
|
326
|
1
|
|
|
|
|
39
|
$self->log->info("Daemon finished"); |
|
327
|
|
|
|
|
|
|
|
|
328
|
1
|
|
|
|
|
92
|
return; |
|
329
|
|
|
|
|
|
|
} |
|
330
|
|
|
|
|
|
|
|
|
331
|
|
|
|
|
|
|
sub stop { |
|
332
|
0
|
|
|
0
|
0
|
|
my $self = shift; |
|
333
|
|
|
|
|
|
|
|
|
334
|
0
|
|
|
|
|
|
$self->log->info("Stopping daemon"); |
|
335
|
|
|
|
|
|
|
|
|
336
|
0
|
|
|
|
|
|
my $pidfile = $self->pidfile(); |
|
337
|
0
|
|
|
|
|
|
open my $fi, $pidfile; |
|
338
|
0
|
|
|
|
|
|
my $pid = <$fi>; |
|
339
|
0
|
|
|
|
|
|
chomp $pid; |
|
340
|
0
|
|
|
|
|
|
close $fi; |
|
341
|
|
|
|
|
|
|
|
|
342
|
0
|
0
|
|
|
|
|
if (kill 0, $pid) { |
|
343
|
0
|
|
|
|
|
|
kill 'TERM', $pid; |
|
344
|
|
|
|
|
|
|
} else { |
|
345
|
0
|
|
|
|
|
|
die "Couldn't send kill 0 to master process"; |
|
346
|
|
|
|
|
|
|
} |
|
347
|
|
|
|
|
|
|
} |
|
348
|
|
|
|
|
|
|
|
|
349
|
|
|
|
|
|
|
1; |