5 BEGIN { pop @INC if $INC[-1] eq '.' };
7 # Copyright (c) 2007-2015 University of Cambridge.
8 # See the file NOTICE for conditions of use and distribution.
10 # Except when they appear in comments, the following placeholders in this
11 # source are replaced when it is turned into a runnable script:
19 # This is a perl script which extracts from an Exim log all entries
20 # for all messages that have an entry that matches a given pattern.
21 # If *any* entry for a particular message matches the pattern, *all*
22 # entries for that message are displayed.
24 # We buffer up information on a per-message basis. It is done this way rather
25 # than reading the input twice so that the input can be a pipe.
27 # There must be one argument, which is the pattern. Subsequent arguments
28 # are the files to scan; if none, the standard input is read. If any file
29 # appears to be compressed, it is passed through zcat. We can't just do this
30 # for all files, because zcat chokes on non-compressed files.
32 # Performance optimized in 02/02/2007 by Jori Hamalainen
33 # Typical run time acceleration: 4 times
36 use Getopt::Std qw(getopts);
40 # This subroutine converts a time/date string from an Exim log line into
41 # the number of seconds since the epoch. It handles optional timezone
45 my($year,$month,$day,$hour,$min,$sec,$tzs,$tzh,$tzm) =
46 $_[0] =~ /^(\d{4})-(\d\d)-(\d\d)\s(\d\d):(\d\d):(\d\d)(?>\s([+-])(\d\d)(\d\d))?/o;
48 my $seconds = mktime $sec, $min, $hour, $day, $month - 1, $year - 1900;
52 $seconds -= $tzh * 3600 + $tzm * 60 if $tzs eq "+";
53 $seconds += $tzh * 3600 + $tzm * 60 if $tzs eq "-";
60 # This subroutine processes a single line (in $_) from a log file. Program
61 # defensively against short lines finding their way into the log.
63 my (%saved, %id_list, $pattern, $queue_time, $insensitive, $invert);
65 # If using "related" option, have to track extra message IDs
72 # Convert syslog lines to mainlog format, as in eximstats.
74 if (!/^\d{4}-/o) { $_ =~ s/^.*? exim\b.*?: //o; }
77 my($date,$id) = /^(\d{4}-\d\d-\d\d \d\d:\d\d:\d\d (?:[+-]\d{4} )?)(?:\[\d+\] )?(\w{6}\-\w{6}\-\w{2})?/o;
79 # Handle the case when the log line belongs to a specific message. We save
80 # lines for specific messages until the message is complete. Then either print
85 $saved{$id} = '' unless defined($saved{$id});
87 # Save up the data for this message in case it becomes interesting later.
91 # Are we interested in this id ? Short circuit if we already were interested.
95 $id_list{$id} = 1 if (!defined($id_list{$id}));
96 $id_list{$id} = 0 if (($insensitive && /$pattern/io) || /$pattern/o);
100 if (defined $id_list{$id} ||
101 ($insensitive && /$pattern/io) || /$pattern/o)
104 get_related_ids($id) if $related;
106 elsif ($related && $related_re)
108 grep_for_related($_, $id);
112 # See if this is a completion for some message. If it is interesting,
113 # print it, but in any event, throw away what was saved.
115 if (index($_, 'Completed') != -1 ||
116 index($_, 'SMTP data timeout') != -1 ||
117 (index($_, 'rejected') != -1 &&
118 /^(\d{4}-\d\d-\d\d \d\d:\d\d:\d\d (?:[+-]\d{4} )?)(?:\[\d+\] )?\w{6}\-\w{6}\-\w{2} rejected/o))
120 if ($queue_time != -1 &&
121 $saved{$id} =~ /^(\d{4}-\d\d-\d\d \d\d:\d\d:\d\d ([+-]\d{4} )?)/o)
123 my $old_sec = &seconds($1);
124 my $sec = &seconds($date);
125 $id_list{$id} = 0 if $id_list{$id} && $sec - $old_sec <= $queue_time;
128 print "$saved{$id}\n" if ($id_list{$id});
129 delete $id_list{$id};
134 # Handle the case where the log line does not belong to a specific message.
135 # Print it if it is interesting.
137 elsif ( ($invert && (($insensitive && !/$pattern/io) || !/$pattern/o)) ||
138 (!$invert && (($insensitive && /$pattern/io) || /$pattern/o)) )
142 # Rotated log files are frequently compressed and there are a variety of
143 # formats it could be compressed with. Rather than use just one that is
144 # detected and hardcoded at Exim compile time, detect and use what the
145 # logfile is compressed with on the fly.
147 # List of known compression extensions and their associated commands:
149 gz => { cmd => 'zcat', args => '' },
150 bz2 => { cmd => 'bzcat', args => '' },
151 xz => { cmd => 'xzcat', args => '' },
152 lzma => { cmd => 'lzma', args => '-dc' }
156 sub detect_compressor_bin
159 my $c = $compressors->{$ext}->{cmd};
160 $compressors->{$ext}->{bin} = `which $c 2>/dev/null`;
161 chomp($compressors->{$ext}->{bin});
164 sub detect_compressor_capable
166 my $filename = shift();
167 map { &detect_compressor_bin($_) } keys %$compressors
171 unless (grep {$filename =~ /\.(?:$_)$/} keys %$compressors);
172 # Loop through them, figure out which one it detected,
173 # and build the commandline.
175 foreach my $ext (keys %$compressors)
177 if ($filename =~ /\.(?:$ext)$/)
179 # Just die if compressor not found; if this occurs in the middle of
180 # two valid files with a lot of matches, error could easily be missed.
181 die("Didn't find $ext decompressor for $filename\n")
182 if ($compressors->{$ext}->{bin} eq '');
183 $cmdline = $compressors->{$ext}->{bin} ." ".
184 $compressors->{$ext}->{args};
191 sub grep_for_related {
193 $id_list{$id} = 1 if $line =~ m/$related_re/;
196 sub get_related_ids {
198 push @Mids, $id unless grep /\b$id\b/, @Mids;
199 my $re = join '|', @Mids;
200 $related_re = qr/$re/;
203 # The main program. Extract the pattern and make sure any relevant characters
204 # are quoted if the -l flag is given. The -t flag gives a time-on-queue value
205 # which is an additional condition. The -M flag will also display "related"
206 # loglines (msgid from matched lines is searched in following lines).
208 getopts('Ilvt:M',\my %args);
209 $queue_time = $args{'t'}? $args{'t'} : -1;
210 $insensitive = $args{'I'}? 0 : 1;
211 $invert = $args{'v'}? 1 : 0;
212 $related = $args{'M'}? 1 : 0;
214 die "usage: exigrep [-I] [-l] [-M] [-t <seconds>] [-v] <pattern> [<log file>]...\n"
217 $pattern = shift @ARGV;
218 $pattern = quotemeta $pattern if $args{l};
221 # If file arguments are given, open each one and process according as it is
222 # is compressed or not.
229 if (-x 'ZCAT_COMMAND' && $filename =~ /\.(?:COMPRESS_SUFFIX)$/o)
231 open(LOG, "ZCAT_COMMAND $filename |") ||
232 die "Unable to zcat $filename: $!\n";
234 elsif (my $cmdline = &detect_compressor_capable($filename))
236 open(LOG, "$cmdline $filename |") ||
237 die "Unable to decompress $filename: $!\n";
241 open(LOG, "<$filename") || die "Unable to open $filename: $!\n";
243 do_line() while (<LOG>);
248 # If no files are named, process STDIN only
250 else { do_line() while (<STDIN>); }
252 # At the end of processing all the input, print any uncompleted messages.
256 print "+++ $_ has not completed +++\n$saved{$_}\n";