src/src/exigrep.src

   1 #! PERL_COMMAND -w
   2 # $Cambridge: exim/src/src/exigrep.src,v 1.8 2007/03/13 11:26:49 ph10 Exp $
   3
   4 use strict;
   5
   6 # Copyright (c) 2007 University of Cambridge.
   7 # See the file NOTICE for conditions of use and distribution.
   8
   9 # Except when they appear in comments, the following placeholders in this
  10 # source are replaced when it is turned into a runnable script:
  11 #
  12 # PERL_COMMAND
  13 # ZCAT_COMMAND
  14 # COMPRESS_SUFFIX
  15
  16 # PROCESSED_FLAG
  17
  18 # This is a perl script which extracts from an Exim log all entries
  19 # for all messages that have an entry that matches a given pattern.
  20 # If *any* entry for a particular message matches the pattern, *all*
  21 # entries for that message are displayed.
  22
  23 # We buffer up information on a per-message basis. It is done this way rather
  24 # than reading the input twice so that the input can be a pipe.
  25
  26 # There must be one argument, which is the pattern. Subsequent arguments
  27 # are the files to scan; if none, the standard input is read. If any file
  28 # appears to be compressed, it is passed through zcat. We can't just do this
  29 # for all files, because zcat chokes on non-compressed files.
  30
  31 # Performance optimized in 02/02/2007 by Jori Hamalainen
  32 # Typical run time acceleration: 4 times
  33
  34
  35 use Getopt::Std qw(getopts);
  36 use POSIX qw(mktime);
  37
  38
  39 # This subroutine converts a time/date string from an Exim log line into
  40 # the number of seconds since the epoch. It handles optional timezone
  41 # information.
  42
  43 sub seconds {
  44 my($year,$month,$day,$hour,$min,$sec,$tzs,$tzh,$tzm) =
  45   $_[0] =~ /^(\d{4})-(\d\d)-(\d\d)\s(\d\d):(\d\d):(\d\d)(?>\s([+-])(\d\d)(\d\d))?/o;
  46
  47 my $seconds = mktime $sec, $min, $hour, $day, $month - 1, $year - 1900;
  48
  49 if (defined $tzs)
  50   {
  51   $seconds -= $tzh * 3600 + $tzm * 60 if $tzs eq "+";
  52   $seconds += $tzh * 3600 + $tzm * 60 if $tzs eq "-";
  53   }
  54
  55 return $seconds;
  56 }
  57
  58
  59 # This subroutine processes a single line (in $_) from a log file. Program
  60 # defensively against short lines finding their way into the log.
  61
  62 my (%saved, %id_list, $pattern, $queue_time, $insensitive, $invert);
  63
  64 sub do_line {
  65
  66 # Convert syslog lines to mainlog format, as in eximstats.
  67
  68 if (!/^\d{4}-/o) { $_ =~ s/^.*? exim\b.*?: //o; }
  69
  70 return unless
  71   my($date,$id) = /^(\d{4}-\d\d-\d\d \d\d:\d\d:\d\d (?:[+-]\d{4} )?)(?:\[\d+\] )?(\w{6}\-\w{6}\-\w{2})?/o;
  72
  73 # Handle the case when the log line belongs to a specific message. We save
  74 # lines for specific messages until the message is complete. Then either print
  75 # or discard.
  76
  77 if (defined $id)
  78   {
  79   $saved{$id} = '' unless defined($saved{$id});
  80
  81   # Save up the data for this message in case it becomes interesting later.
  82
  83   $saved{$id} .= $_;
  84
  85   # Are we interested in this id ? Short circuit if we already were interested.
  86
  87   if ($invert)
  88     {
  89     $id_list{$id} = 1 if (!defined($id_list{$id}));
  90     $id_list{$id} = 0 if (($insensitive && /$pattern/io) || /$pattern/o);
  91     }
  92   else
  93     {
  94     $id_list{$id} = 1 if defined $id_list{$id} ||
  95       ($insensitive && /$pattern/io) || /$pattern/o;
  96     }
  97
  98   # See if this is a completion for some message. If it is interesting,
  99   # print it, but in any event, throw away what was saved.
 100
 101   if (index($_, 'Completed') != -1 ||
 102       (index($_, 'rejected') != -1 &&
 103        /rejected (?:by local_scan|by non-SMTP ACL|after DATA)/o))
 104     {
 105     if ($queue_time != -1 &&
 106         $saved{$id} =~ /^(\d{4}-\d\d-\d\d \d\d:\d\d:\d\d ([+-]\d{4} )?)/o)
 107       {
 108       my $old_sec = &seconds($1);
 109       my $sec = &seconds($date);
 110       delete $id_list{$id} if $id_list{$id} && $sec - $old_sec <= $queue_time;
 111       }
 112
 113     if ($id_list{$id})
 114       {
 115       delete $id_list{$id};
 116       print "$saved{$id}\n";
 117       }
 118
 119     delete $id_list{$id};
 120     delete $saved{$id};
 121     }
 122   }
 123
 124 # Handle the case where the log line does not belong to a specific message.
 125 # Print it if it is interesting.
 126
 127 elsif ( ($invert && (($insensitive && !/$pattern/io) || !/$pattern/o)) ||
 128        (!$invert && (($insensitive &&  /$pattern/io) ||  /$pattern/o)) )
 129   { print "$_\n"; }
 130 }
 131
 132
 133 # The main program. Extract the pattern and make sure any relevant characters
 134 # are quoted if the -l flag is given. The -t flag gives a time-on-queue value
 135 # which is an additional condition.
 136
 137 getopts('Ilvt:',\my %args);
 138 $queue_time  = $args{'t'}? $args{'t'} : -1;
 139 $insensitive = $args{'I'}? 0 : 1;
 140 $invert      = $args{'v'}? 1 : 0;
 141
 142 die "usage: exigrep [-I] [-l] [-t <seconds>] [-v] <pattern> [<log file>]...\n"
 143   if ($#ARGV < 0);
 144
 145 $pattern = shift @ARGV;
 146 $pattern = quotemeta $pattern if $args{l};
 147
 148
 149 # If file arguments are given, open each one and process according as it is
 150 # is compressed or not.
 151
 152 if (@ARGV)
 153   {
 154   foreach (@ARGV)
 155     {
 156     my $filename = $_;
 157     if ($filename =~ /\.(?:COMPRESS_SUFFIX)$/o)
 158       {
 159       open(LOG, "ZCAT_COMMAND $filename |") ||
 160         die "Unable to zcat $filename: $!\n";
 161       }
 162     else
 163       {
 164       open(LOG, "<$filename") || die "Unable to open $filename: $!\n";
 165       }
 166     do_line() while (<LOG>);
 167     close(LOG);
 168     }
 169   }
 170
 171 # If no files are named, process STDIN only
 172
 173 else { do_line() while (<STDIN>); }
 174
 175 # At the end of processing all the input, print any uncompleted messages. If
 176 # there is no <= line, we are dealing with a message that was rejected or
 177 # abandoned.
 178
 179 for (keys %id_list)
 180   {
 181   if ($saved{$_} =~ /\s<=\s/)
 182     { print "+++ $_ has not completed +++\n$saved{$_}\n"; }
 183   else
 184     { print "+++ $_ was not accepted +++\n$saved{$_}\n"; }
 185   }
 186
 187 # End of exigrep