5 # Copyright (c) 2007-2014 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);
63 # If using "related" option, have to track extra message IDs
70 # Convert syslog lines to mainlog format, as in eximstats.
72 if (!/^\d{4}-/o) { $_ =~ s/^.*? exim\b.*?: //o; }
75 my($date,$id) = /^(\d{4}-\d\d-\d\d \d\d:\d\d:\d\d (?:[+-]\d{4} )?)(?:\[\d+\] )?(\w{6}\-\w{6}\-\w{2})?/o;
77 # Handle the case when the log line belongs to a specific message. We save
78 # lines for specific messages until the message is complete. Then either print
83 $saved{$id} = '' unless defined($saved{$id});
85 # Save up the data for this message in case it becomes interesting later.
89 # Are we interested in this id ? Short circuit if we already were interested.
93 $id_list{$id} = 1 if (!defined($id_list{$id}));
94 $id_list{$id} = 0 if (($insensitive && /$pattern/io) || /$pattern/o);
98 if (defined $id_list{$id} ||
99 ($insensitive && /$pattern/io) || /$pattern/o)
102 get_related_ids($id) if $related;
104 elsif ($related && $related_re)
106 grep_for_related($_, $id);
110 # See if this is a completion for some message. If it is interesting,
111 # print it, but in any event, throw away what was saved.
113 if (index($_, 'Completed') != -1 ||
114 index($_, 'SMTP data timeout') != -1 ||
115 (index($_, 'rejected') != -1 &&
116 /^(\d{4}-\d\d-\d\d \d\d:\d\d:\d\d (?:[+-]\d{4} )?)(?:\[\d+\] )?\w{6}\-\w{6}\-\w{2} rejected/o))
118 if ($queue_time != -1 &&
119 $saved{$id} =~ /^(\d{4}-\d\d-\d\d \d\d:\d\d:\d\d ([+-]\d{4} )?)/o)
121 my $old_sec = &seconds($1);
122 my $sec = &seconds($date);
123 $id_list{$id} = 0 if $id_list{$id} && $sec - $old_sec <= $queue_time;
126 print "$saved{$id}\n" if ($id_list{$id});
127 delete $id_list{$id};
132 # Handle the case where the log line does not belong to a specific message.
133 # Print it if it is interesting.
135 elsif ( ($invert && (($insensitive && !/$pattern/io) || !/$pattern/o)) ||
136 (!$invert && (($insensitive && /$pattern/io) || /$pattern/o)) )
140 # Rotated log files are frequently compressed and there are a variety of
141 # formats it could be compressed with. Rather than use just one that is
142 # detected and hardcoded at Exim compile time, detect and use what the
143 # logfile is compressed with on the fly.
145 # List of known compression extensions and their associated commands:
147 gz => { cmd => 'zcat', args => '' },
148 bz2 => { cmd => 'bzcat', args => '' },
149 xz => { cmd => 'xzcat', args => '' },
150 lzma => { cmd => 'lzma', args => '-dc' }
154 sub detect_compressor_bin
157 my $c = $compressors->{$ext}->{cmd};
158 $compressors->{$ext}->{bin} = `which $c 2>/dev/null`;
159 chomp($compressors->{$ext}->{bin});
162 sub detect_compressor_capable
164 my $filename = shift();
165 map { &detect_compressor_bin($_) } keys %$compressors
169 unless (grep {$filename =~ /\.(?:$_)$/} keys %$compressors);
170 # Loop through them, figure out which one it detected,
171 # and build the commandline.
173 foreach my $ext (keys %$compressors)
175 if ($filename =~ /\.(?:$ext)$/)
177 # Just die if compressor not found; if this occurrs in the middle of
178 # two valid files with a lot of matches, error could easily be missed.
179 die("Didn't find $ext decompressor for $filename\n")
180 if ($compressors->{$ext}->{bin} eq '');
181 $cmdline = $compressors->{$ext}->{bin} ." ".
182 $compressors->{$ext}->{args};
189 sub grep_for_related {
191 $id_list{$id} = 1 if $line =~ m/$related_re/;
194 sub get_related_ids {
196 push @Mids, $id unless grep /\b$id\b/, @Mids;
197 my $re = join '|', @Mids;
198 $related_re = qr/$re/;
201 # The main program. Extract the pattern and make sure any relevant characters
202 # are quoted if the -l flag is given. The -t flag gives a time-on-queue value
203 # which is an additional condition. The -M flag will also display "related"
204 # loglines (msgid from matched lines is searched in following lines).
206 getopts('Ilvt:M',\my %args);
207 $queue_time = $args{'t'}? $args{'t'} : -1;
208 $insensitive = $args{'I'}? 0 : 1;
209 $invert = $args{'v'}? 1 : 0;
210 $related = $args{'M'}? 1 : 0;
212 die "usage: exigrep [-I] [-l] [-M] [-t <seconds>] [-v] <pattern> [<log file>]...\n"
215 $pattern = shift @ARGV;
216 $pattern = quotemeta $pattern if $args{l};
219 # If file arguments are given, open each one and process according as it is
220 # is compressed or not.
227 if ($filename =~ /\.(?:COMPRESS_SUFFIX)$/o)
229 open(LOG, "ZCAT_COMMAND $filename |") ||
230 die "Unable to zcat $filename: $!\n";
232 elsif (my $cmdline = &detect_compressor_capable($filename))
234 open(LOG, "$cmdline $filename |") ||
235 die "Unable to decompress $filename: $!\n";
239 open(LOG, "<$filename") || die "Unable to open $filename: $!\n";
241 do_line() while (<LOG>);
246 # If no files are named, process STDIN only
248 else { do_line() while (<STDIN>); }
250 # At the end of processing all the input, print any uncompleted messages.
254 print "+++ $_ has not completed +++\n$saved{$_}\n";