2 # $Cambridge: exim/src/src/exigrep.src,v 1.7 2007/03/13 11:06:48 ph10 Exp $
6 # Copyright (c) 2007 University of Cambridge.
7 # See the file NOTICE for conditions of use and distribution.
9 # Except when they appear in comments, the following placeholders in this
10 # source are replaced when it is turned into a runnable script:
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.
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.
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.
31 # Performance optimized in 02/02/2007 by Jori Hamalainen
32 # Typical run time acceleration: 4 times
35 use Getopt::Std qw(getopts);
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
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;
47 my $seconds = mktime $sec, $min, $hour, $day, $month - 1, $year - 1900;
51 $seconds -= $tzh * 3600 + $tzm * 60 if $tzs eq "+";
52 $seconds += $tzh * 3600 + $tzm * 60 if $tzs eq "-";
59 # This subroutine processes a single line (in $_) from a log file. Program
60 # defensively against short lines finding their way into the log.
62 my (%saved, %id_list, $pattern, $queue_time, $insensitive, $invert);
66 # Convert syslog lines to mainlog format, as in eximstats.
68 if (!/^\d{4}-/o) { $_ =~ s/^.*? exim\b.*?: //o; }
71 my($date,$id) = /^(\d{4}-\d\d-\d\d \d\d:\d\d:\d\d (?:[+-]\d{4} )?)(?:\[\d+\] )?(\w{6}\-\w{6}\-\w{2})?/o;
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
79 $saved{$id} = '' unless defined($saved{$id});
81 # Save up the data for this message in case it becomes interesting later.
85 # Are we interested in this id ? Short circuit if we already were interested.
89 $id_list{$id} = 1 if (!defined($id_list{$id}));
90 $id_list{$id} = 0 if (($insensitive && /$pattern/io) || /$pattern/o);
94 $id_list{$id} = 1 if defined $id_list{$id} ||
95 ($insensitive && /$pattern/io) || /$pattern/o;
98 # See if this is a completion for some message. If it is interesting,
99 # print it, but in any event, throw away what was saved.
101 if (index($_, 'Completed') != -1 ||
102 (index($_, 'rejected') != -1 &&
103 /rejected (?:by local_scan|by non-SMTP ACL|after DATA)/o))
105 if ($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 delete $id_list{$id} if $id_list{$id} && $sec - $old_sec <= $queue_time;
115 delete $id_list{$id};
116 print "$saved{$id}\n";
119 delete $id_list{$id};
124 # Handle the case where the log line does not belong to a specific message.
125 # Print it if it is interesting.
127 elsif ( ($invert && (($insensitive && !/$pattern/io) || !/$pattern/o)) ||
128 (!$invert && (($insensitive && /$pattern/io) || /$pattern/o)) )
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.
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;
142 die "usage: exigrep [-I] [-l] [-t <seconds>] [-v] <pattern> [<log file>]...\n"
145 $pattern = shift @ARGV;
146 $pattern = quotemeta $pattern if $args{l};
149 # If file arguments are given, open each one and process according as it is
150 # is compressed or not.
157 if ($filename =~ /\.(?:COMPRESS_SUFFIX)$/o)
159 open(LOG, "ZCAT_COMMAND $filename |") ||
160 die "Unable to zcat $filename: $!\n";
164 open(LOG, "<$filename") || die "Unable to open $filename: $!\n";
166 do_line() while (<LOG>);
171 # If no files are named, process STDIN only
173 else { do_line() while (<STDIN>); }
175 # At the end of processing all the input, print any uncompleted data
177 for (keys %id_list) { print "+++ $_ not completed +++\n$saved{$_}\n"; }