/usr/sbin/exigrep is in exim4-base 4.86.2-2ubuntu2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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use strict;
# Copyright (c) 2007-2015 University of Cambridge.
# See the file NOTICE for conditions of use and distribution.
# Except when they appear in comments, the following placeholders in this
# source are replaced when it is turned into a runnable script:
#
# PERL_COMMAND
# ZCAT_COMMAND
# COMPRESS_SUFFIX
# This file has been so processed.
# This is a perl script which extracts from an Exim log all entries
# for all messages that have an entry that matches a given pattern.
# If *any* entry for a particular message matches the pattern, *all*
# entries for that message are displayed.
# We buffer up information on a per-message basis. It is done this way rather
# than reading the input twice so that the input can be a pipe.
# There must be one argument, which is the pattern. Subsequent arguments
# are the files to scan; if none, the standard input is read. If any file
# appears to be compressed, it is passed through zcat. We can't just do this
# for all files, because zcat chokes on non-compressed files.
# Performance optimized in 02/02/2007 by Jori Hamalainen
# Typical run time acceleration: 4 times
use Getopt::Std qw(getopts);
use POSIX qw(mktime);
# This subroutine converts a time/date string from an Exim log line into
# the number of seconds since the epoch. It handles optional timezone
# information.
sub seconds {
my($year,$month,$day,$hour,$min,$sec,$tzs,$tzh,$tzm) =
$_[0] =~ /^(\d{4})-(\d\d)-(\d\d)\s(\d\d):(\d\d):(\d\d)(?>\s([+-])(\d\d)(\d\d))?/o;
my $seconds = mktime $sec, $min, $hour, $day, $month - 1, $year - 1900;
if (defined $tzs)
{
$seconds -= $tzh * 3600 + $tzm * 60 if $tzs eq "+";
$seconds += $tzh * 3600 + $tzm * 60 if $tzs eq "-";
}
return $seconds;
}
# This subroutine processes a single line (in $_) from a log file. Program
# defensively against short lines finding their way into the log.
my (%saved, %id_list, $pattern, $queue_time, $insensitive, $invert);
# If using "related" option, have to track extra message IDs
my $related;
my $related_re='';
my @Mids = ();
sub do_line {
# Convert syslog lines to mainlog format, as in eximstats.
if (!/^\d{4}-/o) { $_ =~ s/^.*? exim\b.*?: //o; }
return unless
my($date,$id) = /^(\d{4}-\d\d-\d\d \d\d:\d\d:\d\d (?:[+-]\d{4} )?)(?:\[\d+\] )?(\w{6}\-\w{6}\-\w{2})?/o;
# Handle the case when the log line belongs to a specific message. We save
# lines for specific messages until the message is complete. Then either print
# or discard.
if (defined $id)
{
$saved{$id} = '' unless defined($saved{$id});
# Save up the data for this message in case it becomes interesting later.
$saved{$id} .= $_;
# Are we interested in this id ? Short circuit if we already were interested.
if ($invert)
{
$id_list{$id} = 1 if (!defined($id_list{$id}));
$id_list{$id} = 0 if (($insensitive && /$pattern/io) || /$pattern/o);
}
else
{
if (defined $id_list{$id} ||
($insensitive && /$pattern/io) || /$pattern/o)
{
$id_list{$id} = 1;
get_related_ids($id) if $related;
}
elsif ($related && $related_re)
{
grep_for_related($_, $id);
}
}
# See if this is a completion for some message. If it is interesting,
# print it, but in any event, throw away what was saved.
if (index($_, 'Completed') != -1 ||
index($_, 'SMTP data timeout') != -1 ||
(index($_, 'rejected') != -1 &&
/^(\d{4}-\d\d-\d\d \d\d:\d\d:\d\d (?:[+-]\d{4} )?)(?:\[\d+\] )?\w{6}\-\w{6}\-\w{2} rejected/o))
{
if ($queue_time != -1 &&
$saved{$id} =~ /^(\d{4}-\d\d-\d\d \d\d:\d\d:\d\d ([+-]\d{4} )?)/o)
{
my $old_sec = &seconds($1);
my $sec = &seconds($date);
$id_list{$id} = 0 if $id_list{$id} && $sec - $old_sec <= $queue_time;
}
print "$saved{$id}\n" if ($id_list{$id});
delete $id_list{$id};
delete $saved{$id};
}
}
# Handle the case where the log line does not belong to a specific message.
# Print it if it is interesting.
elsif ( ($invert && (($insensitive && !/$pattern/io) || !/$pattern/o)) ||
(!$invert && (($insensitive && /$pattern/io) || /$pattern/o)) )
{ print "$_\n"; }
}
# Rotated log files are frequently compressed and there are a variety of
# formats it could be compressed with. Rather than use just one that is
# detected and hardcoded at Exim compile time, detect and use what the
# logfile is compressed with on the fly.
#
# List of known compression extensions and their associated commands:
my $compressors = {
gz => { cmd => 'zcat', args => '' },
bz2 => { cmd => 'bzcat', args => '' },
xz => { cmd => 'xzcat', args => '' },
lzma => { cmd => 'lzma', args => '-dc' }
};
my $csearch = 0;
sub detect_compressor_bin
{
my $ext = shift();
my $c = $compressors->{$ext}->{cmd};
$compressors->{$ext}->{bin} = `which $c 2>/dev/null`;
chomp($compressors->{$ext}->{bin});
}
sub detect_compressor_capable
{
my $filename = shift();
map { &detect_compressor_bin($_) } keys %$compressors
if (!$csearch);
$csearch = 1;
return undef
unless (grep {$filename =~ /\.(?:$_)$/} keys %$compressors);
# Loop through them, figure out which one it detected,
# and build the commandline.
my $cmdline = undef;
foreach my $ext (keys %$compressors)
{
if ($filename =~ /\.(?:$ext)$/)
{
# Just die if compressor not found; if this occurrs in the middle of
# two valid files with a lot of matches, error could easily be missed.
die("Didn't find $ext decompressor for $filename\n")
if ($compressors->{$ext}->{bin} eq '');
$cmdline = $compressors->{$ext}->{bin} ." ".
$compressors->{$ext}->{args};
last;
}
}
return $cmdline;
}
sub grep_for_related {
my ($line,$id) = @_;
$id_list{$id} = 1 if $line =~ m/$related_re/;
}
sub get_related_ids {
my ($id) = @_;
push @Mids, $id unless grep /\b$id\b/, @Mids;
my $re = join '|', @Mids;
$related_re = qr/$re/;
}
# The main program. Extract the pattern and make sure any relevant characters
# are quoted if the -l flag is given. The -t flag gives a time-on-queue value
# which is an additional condition. The -M flag will also display "related"
# loglines (msgid from matched lines is searched in following lines).
getopts('Ilvt:M',\my %args);
$queue_time = $args{'t'}? $args{'t'} : -1;
$insensitive = $args{'I'}? 0 : 1;
$invert = $args{'v'}? 1 : 0;
$related = $args{'M'}? 1 : 0;
die "usage: exigrep [-I] [-l] [-M] [-t <seconds>] [-v] <pattern> [<log file>]...\n"
if ($#ARGV < 0);
$pattern = shift @ARGV;
$pattern = quotemeta $pattern if $args{l};
# If file arguments are given, open each one and process according as it is
# is compressed or not.
if (@ARGV)
{
foreach (@ARGV)
{
my $filename = $_;
if (-x 'zcat' && $filename =~ /\.(?:gz)$/o)
{
open(LOG, "zcat $filename |") ||
die "Unable to zcat $filename: $!\n";
}
elsif (my $cmdline = &detect_compressor_capable($filename))
{
open(LOG, "$cmdline $filename |") ||
die "Unable to decompress $filename: $!\n";
}
else
{
open(LOG, "<$filename") || die "Unable to open $filename: $!\n";
}
do_line() while (<LOG>);
close(LOG);
}
}
# If no files are named, process STDIN only
else { do_line() while (<STDIN>); }
# At the end of processing all the input, print any uncompleted messages.
for (keys %id_list)
{
print "+++ $_ has not completed +++\n$saved{$_}\n";
}
# End of exigrep
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