5 # Copyright (c) 2007 University of Cambridge.
6 # See the file NOTICE for conditions of use and distribution.
8 # Except when they appear in comments, the following placeholders in this
9 # source are replaced when it is turned into a runnable script:
17 # This is a perl script which extracts from an Exim log all entries
18 # for all messages that have an entry that matches a given pattern.
19 # If *any* entry for a particular message matches the pattern, *all*
20 # entries for that message are displayed.
22 # We buffer up information on a per-message basis. It is done this way rather
23 # than reading the input twice so that the input can be a pipe.
25 # There must be one argument, which is the pattern. Subsequent arguments
26 # are the files to scan; if none, the standard input is read. If any file
27 # appears to be compressed, it is passed through zcat. We can't just do this
28 # for all files, because zcat chokes on non-compressed files.
30 # Performance optimized in 02/02/2007 by Jori Hamalainen
31 # Typical run time acceleration: 4 times
34 use Getopt::Std qw(getopts);
38 # This subroutine converts a time/date string from an Exim log line into
39 # the number of seconds since the epoch. It handles optional timezone
43 my($year,$month,$day,$hour,$min,$sec,$tzs,$tzh,$tzm) =
44 $_[0] =~ /^(\d{4})-(\d\d)-(\d\d)\s(\d\d):(\d\d):(\d\d)(?>\s([+-])(\d\d)(\d\d))?/o;
46 my $seconds = mktime $sec, $min, $hour, $day, $month - 1, $year - 1900;
50 $seconds -= $tzh * 3600 + $tzm * 60 if $tzs eq "+";
51 $seconds += $tzh * 3600 + $tzm * 60 if $tzs eq "-";
58 # This subroutine processes a single line (in $_) from a log file. Program
59 # defensively against short lines finding their way into the log.
61 my (%saved, %id_list, $pattern, $queue_time, $insensitive, $invert);
65 # Convert syslog lines to mainlog format, as in eximstats.
67 if (!/^\d{4}-/o) { $_ =~ s/^.*? exim\b.*?: //o; }
70 my($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 # Handle the case when the log line belongs to a specific message. We save
73 # lines for specific messages until the message is complete. Then either print
78 $saved{$id} = '' unless defined($saved{$id});
80 # Save up the data for this message in case it becomes interesting later.
84 # Are we interested in this id ? Short circuit if we already were interested.
88 $id_list{$id} = 1 if (!defined($id_list{$id}));
89 $id_list{$id} = 0 if (($insensitive && /$pattern/io) || /$pattern/o);
93 $id_list{$id} = 1 if defined $id_list{$id} ||
94 ($insensitive && /$pattern/io) || /$pattern/o;
97 # See if this is a completion for some message. If it is interesting,
98 # print it, but in any event, throw away what was saved.
100 if (index($_, 'Completed') != -1 ||
101 index($_, 'SMTP data timeout') != -1 ||
102 (index($_, 'rejected') != -1 &&
103 /^(\d{4}-\d\d-\d\d \d\d:\d\d:\d\d (?:[+-]\d{4} )?)(?:\[\d+\] )?\w{6}\-\w{6}\-\w{2} rejected/o))
105 if ($queue_time != -1 &&
106 $saved{$id} =~ /^(\d{4}-\d\d-\d\d \d\d:\d\d:\d\d ([+-]\d{4} )?)/o)
108 my $old_sec = &seconds($1);
109 my $sec = &seconds($date);
110 $id_list{$id} = 0 if $id_list{$id} && $sec - $old_sec <= $queue_time;
113 print "$saved{$id}\n" if ($id_list{$id});
114 delete $id_list{$id};
119 # Handle the case where the log line does not belong to a specific message.
120 # Print it if it is interesting.
122 elsif ( ($invert && (($insensitive && !/$pattern/io) || !/$pattern/o)) ||
123 (!$invert && (($insensitive && /$pattern/io) || /$pattern/o)) )
128 # The main program. Extract the pattern and make sure any relevant characters
129 # are quoted if the -l flag is given. The -t flag gives a time-on-queue value
130 # which is an additional condition.
132 getopts('Ilvt:',\my %args);
133 $queue_time = $args{'t'}? $args{'t'} : -1;
134 $insensitive = $args{'I'}? 0 : 1;
135 $invert = $args{'v'}? 1 : 0;
137 die "usage: exigrep [-I] [-l] [-t <seconds>] [-v] <pattern> [<log file>]...\n"
140 $pattern = shift @ARGV;
141 $pattern = quotemeta $pattern if $args{l};
144 # If file arguments are given, open each one and process according as it is
145 # is compressed or not.
152 if ($filename =~ /\.(?:COMPRESS_SUFFIX)$/o)
154 open(LOG, "ZCAT_COMMAND $filename |") ||
155 die "Unable to zcat $filename: $!\n";
159 open(LOG, "<$filename") || die "Unable to open $filename: $!\n";
161 do_line() while (<LOG>);
166 # If no files are named, process STDIN only
168 else { do_line() while (<STDIN>); }
170 # At the end of processing all the input, print any uncompleted messages.
174 print "+++ $_ has not completed +++\n$saved{$_}\n";