1 | # |
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2 | # Copyright (c) 2004-2007 - Consultas, PKG.fr |
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3 | # |
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4 | # This file is part of A2P. |
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5 | # |
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6 | # A2P is free software; you can redistribute it and/or modify |
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7 | # it under the terms of the GNU General Public License as published by |
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8 | # the Free Software Foundation; either version 2 of the License, or |
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9 | # (at your option) any later version. |
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10 | # |
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11 | # A2P is distributed in the hope that it will be useful, |
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12 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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14 | # GNU General Public License for more details. |
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15 | # |
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16 | # You should have received a copy of the GNU General Public License |
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17 | # along with A2P; if not, write to the Free Software |
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18 | # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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19 | # |
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20 | # $Id: SpoolManager.pm 3 2007-10-18 16:20:19Z guillaume $ |
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21 | # |
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22 | |
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23 | package A2P::SpoolManager; |
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24 | |
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25 | # Derived class from Thread.pm |
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26 | use base qw(A2P::Thread); |
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27 | |
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28 | use strict; |
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29 | use Fcntl; |
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30 | use Fcntl qw( :DEFAULT ); |
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31 | use Time::HiRes qw( usleep gettimeofday ); |
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32 | use A2P::Globals; |
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33 | use A2P::Syslog; |
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34 | use A2P::Tools qw( FcntlLocked WaitFcntlLocked FcntlUnlocked); |
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35 | use A2P::Com qw( IsCom comJOB ); |
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36 | use A2P::JobStatus 'a2pjobstate' ; |
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37 | |
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38 | BEGIN { |
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39 | our $VERSION = sprintf "%s", q$Rev: 415 $ =~ /(\d[0-9.]+)\s+/ ; |
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40 | } |
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41 | our $VERSION ; |
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42 | |
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43 | #+--------------------------------------------------------------------------+ |
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44 | #| Private helpers for file locking | |
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45 | #+--------------------------------------------------------------------------+ |
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46 | sub get_locked (\$) { |
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47 | &TIMESTAT('LOCKING-FILE'); |
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48 | my $self = shift ; |
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49 | my $ref = shift ; |
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50 | my $ret = 1 ; |
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51 | my $LCK ; |
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52 | my $prefix = &prefix($$ref); |
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53 | my $filename = $AFPSPOOL . '/' . $$ref ; |
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54 | $filename =~ s$//$/$g ; # Clean filename |
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55 | |
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56 | # First lock on prefix |
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57 | unless ($self->lockprefix($prefix)) { |
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58 | &Debug("prefix '$prefix' not locked"); |
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59 | &TIMESTAT('LOCKING-FILE'); |
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60 | return 0 ; |
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61 | } |
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62 | |
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63 | unless ( -e $filename ) { |
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64 | &Debug("'$filename' not found"); |
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65 | $self->unlockprefix($prefix); |
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66 | &TIMESTAT('LOCKING-FILE'); |
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67 | return 0 ; |
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68 | } |
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69 | |
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70 | my $lockfile = $AFPSPOOL . "/.a2p/" . $$ref . ".LCK" ; |
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71 | sysopen( $LCK , "$lockfile" , O_WRONLY | O_CREAT ) |
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72 | or $ret = &Error("Can't open '$lockfile' for writing: $!"); |
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73 | |
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74 | if ( $ret ) { |
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75 | &Debug("Trying to get a lock on '$lockfile'"); |
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76 | if ( $ret and &FcntlLocked($LCK)) { |
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77 | truncate($LCK,0); |
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78 | |
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79 | my $newname = $filename ; |
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80 | |
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81 | # Replace "prefix." string by LOCKID folder name |
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82 | $newname =~ s|/$prefix\.|/$LOCKID/| ; |
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83 | &Debug("Renaming '$filename' to '$newname'"); |
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84 | unless (rename $filename , $newname) { |
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85 | &Debug("Can't rename '$$ref': $!"); |
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86 | $ret = 0 ; |
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87 | } |
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88 | |
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89 | if ( $ret and -e $newname ) { |
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90 | $newname =~ s,$AFPSPOOL/*,, ; # Keep only filename |
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91 | $$ref = $newname ; |
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92 | &Debug("'$newname' locked"); |
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93 | |
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94 | } else { |
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95 | &Debug("'$newname' not available"); |
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96 | $ret = 0 ; |
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97 | } |
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98 | |
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99 | } else { |
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100 | &Debug("Can't lock '$lockfile': $!"); |
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101 | $ret = 0 ; |
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102 | } |
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103 | |
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104 | # Remove lock file |
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105 | close($LCK); |
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106 | unlink $lockfile ; |
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107 | } |
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108 | |
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109 | unless ($self->unlockprefix($prefix)) { |
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110 | &Warn("Can't unlock prefix on $prefix before locking on $filename: $!"); |
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111 | &Info("$prefix file must be deleted manually " . |
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112 | "after all concerned services has been stopped"); |
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113 | } |
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114 | |
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115 | &TIMESTAT('LOCKING-FILE'); |
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116 | return $ret ; |
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117 | } |
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118 | |
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119 | sub lockname { |
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120 | my $self = shift ; |
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121 | |
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122 | my $LCK ; |
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123 | my $lock = $AFPSPOOL . '/' . $_[0] ; |
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124 | |
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125 | &Debug("'$_[0]' seems still locked") if ( -s $lock . '.LCK' ); |
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126 | |
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127 | sysopen( $LCK , $lock . ".LCK" , O_WRONLY | O_CREAT ) |
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128 | or &Error("Can't open '$lock.LCK' for writing: $!"), return ""; |
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129 | |
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130 | if(!&FcntlLocked($LCK)) { |
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131 | &Error("Can't lock '$lock.LCK': $!"); |
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132 | return ""; |
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133 | } |
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134 | |
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135 | truncate $LCK , 0 ; |
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136 | |
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137 | # Print our PID in Spool Lock File |
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138 | print $LCK $$ ; |
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139 | |
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140 | $self->{LOCKEDSPOOL} = $LCK ; |
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141 | |
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142 | # Create folder where will be moved files if needed |
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143 | if ( ! -d $lock ) { |
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144 | mkdir $lock , 0775 |
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145 | or &Error("Can't create '$lock' folder: $!"), return ""; |
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146 | } |
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147 | |
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148 | return $lock ; |
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149 | } |
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150 | |
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151 | my @prefix = () ; |
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152 | sub prefix { |
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153 | my $file = shift ; |
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154 | map { return $1 if $file =~ /^($_)\..+/i } @prefix ; |
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155 | return "" ; |
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156 | } |
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157 | |
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158 | sub update_prefix { |
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159 | # Update prefix array as optimization and SPOOL_PREFIX can has been updated |
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160 | return @prefix = split( /\s+/, $_[0] ) ; |
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161 | } |
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162 | |
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163 | ################################################################################ |
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164 | ## Afpspool file handling code ## |
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165 | ################################################################################ |
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166 | sub Do { |
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167 | my $self = shift ; |
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168 | my $ref = shift ; |
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169 | |
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170 | my ( $count , $lastwasmax ) = ( 0 , 1 ); |
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171 | |
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172 | my $file = "" ; |
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173 | my $AfpName = "" ; |
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174 | |
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175 | my @Job = &IsCom( comJOB , $$ref ); |
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176 | |
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177 | # Default request is give me a filename for that job |
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178 | if ( @Job ) { |
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179 | |
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180 | if ( $Job[1] == DONE ) { |
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181 | # Reset last kept information to skip annoying alert before quitting |
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182 | # The JobManager is saying it is managing the file, so it will keep |
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183 | # trace of it even if it should quit or abort |
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184 | ( $self->{LASTJOB} , $self->{LASTFILE} ) = ( $Job[0] , NOMOREFILE ); |
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185 | $self->AnswerDone( $Job[0] ); |
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186 | return 1 ; |
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187 | } |
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188 | |
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189 | # Keep internal stats |
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190 | &UPSTAT('SPOOL_CHECK'); |
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191 | |
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192 | # Locking AFPSPOOL for our LOCKID |
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193 | if (!defined($self->{LockedSpool}->{$AFPSPOOL})) { |
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194 | |
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195 | # Unlock old spool, needed if AFPSPOOL is updated |
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196 | $self->DoBeforeQuit(); |
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197 | |
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198 | # LOCKID will also be a folder in AFPSPOOL, see &get_locked |
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199 | $self->{LockedSpool}->{$AFPSPOOL} = $self->lockname("$LOCKID") ; |
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200 | if ( $self->{LockedSpool}->{$AFPSPOOL} ) { |
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201 | &Debug("'$AFPSPOOL' locked with '$LOCKID' lockid"); |
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202 | |
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203 | } else { |
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204 | $self->ThisError("Can't lock '$AFPSPOOL' folder on '$LOCKID'"); |
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205 | &Alert("Quitting as AFPSPOOL is not available," . |
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206 | " maybe LOCKID is still allocated to another service"); |
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207 | |
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208 | # Tell there's nothing we can do |
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209 | $self->Return( $Job[0] , 1 ); |
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210 | |
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211 | delete $self->{LockedSpool}->{$AFPSPOOL}; |
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212 | $MUSTQUIT ++ ; # Fatal error thread should quit |
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213 | } |
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214 | } |
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215 | |
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216 | # Update prefix array as optimization and needed when SPOOL_PREFIX |
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217 | # has been updated |
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218 | &update_prefix($SPOOL_PREFIX); |
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219 | |
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220 | &Debug("Finding a file for job $Job[0]"); |
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221 | |
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222 | while (length($file) == 0) { |
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223 | $count = scalar( @{$self->{AfpFiles}} ); |
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224 | |
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225 | # Update the cache if needed |
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226 | if ( $count == 0 or ( $count < $MINFOLDERCOUNT and $lastwasmax ) ) { |
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227 | my @LockedFiles = () ; |
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228 | # Set timestamp to MAXRETRYTIMER millisecond earlier |
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229 | my $timestamp = &gettimeofday()*1000 - $MAXRETRYTIMER ; |
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230 | |
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231 | # Spawn command to get files ordered by age from afpspool |
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232 | my $Command = "ls -t1r " . $AFPSPOOL ; |
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233 | &Debug("Starting '$Command' to get file list in spool"); |
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234 | open(CMD, "$Command 2>/dev/null |") |
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235 | or &Alert("Can't start \"$Command\" command"), return ; |
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236 | |
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237 | foreach $file (<CMD>) { |
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238 | chomp($file); |
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239 | &Debug("Checking '$file' is for us"); |
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240 | |
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241 | # Skip our LOCKID locking file |
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242 | next if ( $file =~ /^$LOCKID\.LCK$/ ); |
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243 | |
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244 | # Remove the path from file |
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245 | $file =~ s/$AFPSPOOL\/*// ; |
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246 | |
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247 | # Keep file only if its prefix match one from the list |
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248 | my $prefix = &prefix($file) ; |
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249 | next unless ($prefix); |
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250 | |
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251 | # Keep only not locked files and remove it if in list as |
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252 | # it is just locked by another thread |
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253 | if ( $file =~ /^(.*).LCK$/i ) { |
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254 | $file = $1 ; |
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255 | push @LockedFiles , $file ; |
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256 | @{$self->{AfpFiles}} = grep { ! /^$file$/ } |
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257 | @{$self->{AfpFiles}} ; |
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258 | } |
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259 | |
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260 | # Skip if file is still in our lists |
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261 | next if ( defined($self->{AfpName}->{$file}) and |
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262 | $self->{AfpName}->{$file} ); |
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263 | |
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264 | # Same computation as in afpds2tex module |
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265 | my ( $basename ) = $file =~ /^$prefix\.(.*)$/ ; |
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266 | ( $AfpName ) = $basename =~ $AFPNAME_REGEX ; |
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267 | |
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268 | unless (defined($AfpName) and $AfpName) { |
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269 | &Error("Can't set an afpname with '$file', skipping"); |
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270 | next ; |
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271 | } |
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272 | |
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273 | $self->{AfpName}->{$file} = $AfpName ; |
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274 | push @{$self->{AfpFiles}} , $file ; |
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275 | $self->{Timestamp}->{$file} = $timestamp ; |
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276 | &Debug("'$file' added to listing as '$AfpName' Jobname"); |
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277 | |
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278 | last if ( ++$count >= $MAXFOLDERCOUNT ); |
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279 | } |
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280 | $lastwasmax = $count >= $MAXFOLDERCOUNT ? 1 : 0 ; |
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281 | |
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282 | close(CMD); |
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283 | } |
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284 | |
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285 | # Check files availability |
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286 | if (scalar( @{$self->{AfpFiles}} )) { |
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287 | my $found = 0 ; |
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288 | my @keep = () ; |
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289 | |
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290 | # Loop to try first file from list |
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291 | while (scalar( @{$self->{AfpFiles}} )) { |
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292 | $file = shift(@{$self->{AfpFiles}}); |
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293 | $AfpName = $self->{AfpName}->{$file} ; |
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294 | |
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295 | my $file_time = $self->{Timestamp}->{$file} ; |
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296 | my $can_try = &gettimeofday()*1000 - $file_time ; |
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297 | # Select available file by trying to lock it |
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298 | if ( $can_try >= $MAXRETRYTIMER |
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299 | and $self->get_locked(\$file)) { |
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300 | # file has been updated by &get_locked |
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301 | &Debug("Found '$file' for Job $Job[0]"); |
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302 | $found ++ ; |
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303 | last ; |
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304 | |
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305 | } elsif ( $can_try >= $MAXRETRYTIMER ) { |
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306 | # Set file tried and will only retry later |
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307 | $self->{Timestamp}->{$file} += $can_try ; |
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308 | } |
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309 | |
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310 | if ( -e $file ) { |
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311 | push @keep, $file ; |
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312 | |
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313 | } else { |
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314 | delete $self->{Timestamp}->{$file} ; |
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315 | # Release also the AfpName |
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316 | delete $self->{AfpName}->{$file} ; |
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317 | } |
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318 | } |
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319 | |
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320 | # Store kept files |
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321 | if ( @keep ) { |
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322 | &Debug("Files to retry later: @keep"); |
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323 | unshift @{$self->{AfpFiles}}, @keep ; |
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324 | } |
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325 | |
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326 | if ($found) { |
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327 | # Keep internal stats |
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328 | &UPSTAT('SPOOL_GOT_FILE'); |
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329 | |
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330 | # Initialize jobstatus with AfpName to keep restarts in mind |
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331 | &a2pjobstate( $AfpName , 1 , 'o', |
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332 | { |
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333 | AFP => $AfpName, |
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334 | JOBID => $Job[0], |
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335 | STATUS => 'STARTING', |
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336 | FILE => $file, |
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337 | INFOS => 'Started' |
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338 | } ) |
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339 | or &Info("Can't initialize '$Job[0]' job status"); |
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340 | |
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341 | # We must remove now unused keys retrieving the first key |
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342 | map { |
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343 | # Release this AfpName |
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344 | delete $self->{AfpName}->{$_} ; |
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345 | |
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346 | # Release cache timestamp |
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347 | delete $self->{Timestamp}->{$_} ; |
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348 | |
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349 | } grep { $self->{AfpName}->{$_} eq $AfpName } |
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350 | keys(%{$self->{AfpName}}); |
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351 | |
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352 | last ; |
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353 | |
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354 | } else { |
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355 | &Debug("No available file found for Job $Job[0]"); |
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356 | $file = NOMOREFILE ; |
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357 | |
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358 | # Keep internal stats |
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359 | &UPSTAT('SPOOL_GOT_NOFILE'); |
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360 | |
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361 | # Check available timestamp |
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362 | my $time_count = keys(%{$self->{Timestamp}}) ; |
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363 | unless ( $time_count == @{$self->{AfpFiles}}) { |
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364 | my $diff = $time_count - @{$self->{AfpFiles}} ; |
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365 | &Debug("Found diff between timestamp keys " . |
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366 | "and available files: $diff", "Keys = " . |
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367 | join(' ',keys(%{$self->{Timestamp}})), |
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368 | "Files = @{$self->{AfpFiles}}"); |
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369 | &Info("Got available files cache incoherence"); |
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370 | $self->{AfpFiles} = [] ; |
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371 | $self->{Timestamp} = {} ; |
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372 | $self->{'AfpName'} = {} ; |
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373 | } |
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374 | } |
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375 | |
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376 | } else { |
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377 | &Debug("No file found for Job $Job[0]"); |
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378 | $file = NOMOREFILE ; |
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379 | |
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380 | # Keep internal stats |
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381 | &UPSTAT('SPOOL_GOT_NOFILE'); |
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382 | } |
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383 | |
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384 | } # Until file set or state is nomorefile |
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385 | $self->Return( $Job[0] , $file ); |
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386 | $self->AnswerDone( $Job[0] ); |
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387 | |
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388 | # Keep last information to check it before quitting |
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389 | ( $self->{LASTJOB} , $self->{LASTFILE} ) = ( $Job[0] , $file ); |
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390 | |
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391 | } else { |
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392 | $self->ThisError("Can't do unsupported request '$$ref'"); |
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393 | |
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394 | # Keep internal stats |
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395 | &UPSTAT('SPOOL_CHECK_BADREQFORMAT'); |
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396 | } |
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397 | |
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398 | return $file ; |
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399 | } |
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400 | |
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401 | sub openLockingPrefix { |
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402 | my $self = shift ; |
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403 | |
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404 | # First lock the locking folder |
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405 | my $lock = $AFPSPOOL . '/.a2p/.LCK' ; |
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406 | my $LCK ; |
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407 | sysopen( $LCK, $lock , O_WRONLY | O_CREAT ) |
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408 | or return &Error("Can't open lock in shared folder in spool: $!"); |
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409 | |
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410 | return &Error("Can't get lock on shared folder in spool: $!") |
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411 | unless (&WaitFcntlLocked($LCK)); |
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412 | |
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413 | # Create prefix locking files when required with uppercase filename |
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414 | foreach my $prefix ( map { uc } (@_? @_ : &update_prefix($SPOOL_PREFIX)) ) { |
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415 | my $file = $AFPSPOOL . '/.a2p/' . $prefix . '.LCK' ; |
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416 | # Don't try to reopen file |
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417 | next if (-e $file and defined($self->{LockingPrefix}->{$prefix})); |
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418 | sysopen( $self->{LockingPrefix}->{$prefix} , $file , O_WRONLY|O_CREAT ) |
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419 | or &Error("Can't open prefix lock in shared folder: $!"); |
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420 | $self->{LockFileName}->{$prefix} = $file ; |
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421 | } |
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422 | |
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423 | # Release lock on locking prefix folder |
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424 | return &Error("Can't release lock on shared folder in spool: $!") |
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425 | unless (&FcntlUnlocked($LCK)); |
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426 | |
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427 | close($LCK) |
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428 | or &Warn("Found problem when closing locking file in spool: $!"); |
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429 | |
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430 | 1 ; |
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431 | } |
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432 | |
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433 | sub closeLockingPrefix { |
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434 | my $self = shift ; |
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435 | |
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436 | # First lock the locking folder |
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437 | my $lock = $AFPSPOOL . '/.a2p/.LCK' ; |
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438 | my $LCK ; |
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439 | sysopen( $LCK, $lock , O_WRONLY | O_CREAT ) |
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440 | or return &Error("Can't open lock in shared folder in spool: $!"); |
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441 | |
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442 | return &Error("Can't get lock on shared folder in spool: $!") |
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443 | unless (&WaitFcntlLocked($LCK)); |
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444 | |
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445 | foreach my $prefix ( keys(%{$self->{LockingPrefix}}) ) { |
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446 | &FcntlUnlocked($self->{LockingPrefix}->{$prefix}); |
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447 | close($self->{LockingPrefix}->{$prefix}); |
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448 | delete $self->{LockingPrefix}->{$prefix}; |
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449 | unlink $self->{LockFileName}->{$prefix}; |
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450 | } |
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451 | |
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452 | # Release lock on locking prefix folder |
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453 | return &Error("Can't release lock on shared folder in spool: $!") |
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454 | unless (&FcntlUnlocked($LCK)); |
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455 | |
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456 | close($LCK) |
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457 | or &Warn("Found problem when closing locking file in spool: $!"); |
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458 | |
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459 | 1 ; |
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460 | } |
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461 | |
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462 | sub lockprefix { |
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463 | &TIMESTAT('LOCKING-PREFIX'); |
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464 | my $self = shift ; |
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465 | my $prefix = uc(shift) ; |
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466 | |
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467 | sub locktest ; |
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468 | *locktest = $WAIT_ON_PREFIX ? \&WaitFcntlLocked : \&FcntlLocked ; |
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469 | |
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470 | &UPSTAT('GET-LOCKING-PREFIX'); |
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471 | my ( $try, $locked ) = ( 3, 0 ) ; |
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472 | while ( $try -- ) { |
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473 | |
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474 | &openLockingPrefix($self, $prefix) |
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475 | unless ( -e $self->{LockFileName}->{$prefix} ); |
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476 | |
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477 | unless (defined($self->{LockingPrefix}->{$prefix})) { |
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478 | &openLockingPrefix($self, $prefix); |
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479 | &UPSTAT('BAD-PREFIX-TO-LOCK'); |
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480 | next ; |
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481 | } |
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482 | |
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483 | if (&locktest($self->{LockingPrefix}->{$prefix})) { |
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484 | &UPSTAT('GOOD-LOCKING-PREFIX'); |
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485 | $locked ++ ; |
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486 | last ; |
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487 | } |
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488 | |
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489 | &UPSTAT('BAD-LOCKING-PREFIX'); |
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490 | } |
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491 | |
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492 | &TIMESTAT('LOCKING-PREFIX'); |
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493 | return $locked ; |
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494 | } |
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495 | |
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496 | sub unlockprefix { |
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497 | &TIMESTAT('UNLOCKING-PREFIX'); |
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498 | my $self = shift ; |
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499 | my $prefix = uc(shift) ; |
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500 | my $ret = 1 ; |
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501 | &UPSTAT('GET-PREFIX-UNLOCKING'); |
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502 | |
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503 | unless (defined($self->{LockingPrefix}->{$prefix})) { |
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504 | &Warn("Can't unlock not defined filehandle"); |
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505 | &UPSTAT('BAD-PREFIX-TO-UNLOCK'); |
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506 | $ret -- ; |
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507 | } |
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508 | |
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509 | if ($ret and &FcntlUnlocked($self->{LockingPrefix}->{$prefix})) { |
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510 | &UPSTAT('GOOD-PREFIX-UNLOCKING'); |
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511 | } else { |
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512 | &Warn("Can't unlock prefix '$prefix': $!"); |
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513 | &UPSTAT('BAD-PREFIX-UNLOCKING'); |
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514 | $ret -- ; |
---|
515 | } |
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516 | |
---|
517 | &TIMESTAT('UNLOCKING-PREFIX'); |
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518 | return $ret ; |
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519 | } |
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520 | |
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521 | sub ThreadInit { |
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522 | my $self = shift ; |
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523 | $self->{AfpFiles} = [] ; |
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524 | $self->{Timestamp} = {} ; |
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525 | $self->{AfpName} = {} ; |
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526 | |
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527 | $self->{LockingPrefix} = {} unless (defined($self->{LockingPrefix})); |
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528 | $self->{LockFileName} = {} unless (defined($self->{LockFileName})); |
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529 | |
---|
530 | $self->closeLockingPrefix(); |
---|
531 | $self->openLockingPrefix(); |
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532 | } |
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533 | |
---|
534 | sub DoBeforeQuit { |
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535 | my $self = shift ; |
---|
536 | |
---|
537 | # Close any prefix and unlock the spool |
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538 | if (defined($self->{LOCKEDSPOOL})) { |
---|
539 | &closeLockingPrefix(); |
---|
540 | close($self->{LOCKEDSPOOL}); |
---|
541 | } |
---|
542 | |
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543 | map { |
---|
544 | # Get PID locking this spool, it should be me |
---|
545 | open PID , $self->{LockedSpool}->{$_} . ".LCK" |
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546 | or delete $self->{LockedSpool}->{$_} ; |
---|
547 | my ( $pid ) = <PID> ; |
---|
548 | close PID ; |
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549 | if ( $self->{LockedSpool}->{$_} and $$ =~ /^$pid$/ ) { |
---|
550 | unlink $self->{LockedSpool}->{$_} . ".LCK" ; |
---|
551 | delete $self->{LockedSpool}->{$_} ; |
---|
552 | } |
---|
553 | } keys(%{$self->{LockedSpool}}) ; |
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554 | |
---|
555 | # Check if last response was a file to process to not forget any job |
---|
556 | if ( defined($self->{LASTJOB}) and defined($self->{LASTFILE}) ) { |
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557 | if ( $self->{LASTFILE} != NOMOREFILE ) { |
---|
558 | &Alert("Last request was an AFP job to do, you should check " . |
---|
559 | $self->{LASTJOB} . " job has been processed with '" . |
---|
560 | $self->{LASTFILE} . "' AFP file"); |
---|
561 | } |
---|
562 | } |
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563 | } |
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564 | |
---|
565 | &Debug("Module " . __PACKAGE__ . " v$VERSION loaded"); |
---|
566 | |
---|
567 | 1; |
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