X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/3ce625884681ded8f7e08565dc76ea42a19e3652..ab13201f8a5517a379c461767f16feafa8e01ffb:/src/src/exigrep.src

diff --git a/src/src/exigrep.src b/src/src/exigrep.src
index 0f9fc6908..abc6f3a31 100644
--- a/src/src/exigrep.src
+++ b/src/src/exigrep.src
@@ -1,9 +1,11 @@
-#! PERL_COMMAND -w
-# $Cambridge: exim/src/src/exigrep.src,v 1.9 2007/03/13 16:37:57 ph10 Exp $
+#! PERL_COMMAND
 
+use warnings;
 use strict;
+use Pod::Usage;
+BEGIN { pop @INC if $INC[-1] eq '.' };
 
-# Copyright (c) 2007 University of Cambridge.
+# 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
@@ -61,6 +63,11 @@ return $seconds;
 
 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.
@@ -91,8 +98,16 @@ if (defined $id)
     }
   else
     {
-    $id_list{$id} = 1 if defined $id_list{$id} ||
-      ($insensitive && /$pattern/io) || /$pattern/o;
+    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,
@@ -125,22 +140,96 @@ elsif ( ($invert && (($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 occurs 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.
+# which is an additional condition. The -M flag will also display "related"
+# loglines (msgid from matched lines is searched in following lines).
 
-getopts('Ilvt:',\my %args);
+getopts('Ilvt:Mhm',\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] [-t <seconds>] [-v] <pattern> [<log file>]...\n"
-  if ($#ARGV < 0);
+pod2usage(-exit => 0, -verbose => 1) if $args{'h'};
+pod2usage(-exit => 0, -verbose => 2, -noperldoc => system('perldoc -V 2>/dev/null >/dev/null'))
+    if $args{'m'};
+pod2usage if not @ARGV;
 
 $pattern = shift @ARGV;
 $pattern = quotemeta $pattern if $args{l};
 
+# Start a pager if output goes to a terminal
+if (-t 1)
+  {
+  foreach ($ENV{PAGER}//(), 'less', 'more')
+    {
+    open(my $pager, '|-', $_) or next;
+    select $pager;
+    last;
+    }
+}
 
 # If file arguments are given, open each one and process according as it is
 # is compressed or not.
@@ -150,11 +239,16 @@ if (@ARGV)
   foreach (@ARGV)
     {
     my $filename = $_;
-    if ($filename =~ /\.(?:COMPRESS_SUFFIX)$/o)
+    if (-x 'ZCAT_COMMAND' && $filename =~ /\.(?:COMPRESS_SUFFIX)$/o)
       {
       open(LOG, "ZCAT_COMMAND $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";
@@ -175,4 +269,76 @@ for (keys %id_list)
   print "+++ $_ has not completed +++\n$saved{$_}\n";
   }
 
-# End of exigrep
+__END__
+
+=head1 NAME
+
+exigrep - search Exim's main log
+
+=head1 SYNOPSIS
+
+B<exigrep> [options] pattern [log] ...
+
+=head1 DESCRIPTION
+
+The B<exigrep> utility is a Perl script that searches one or more main log
+files for entries that match a given pattern.  When it finds  a  match,
+it  extracts  all  the  log  entries for the relevant message, not just
+those that match the pattern.  Thus, B<exigrep> can extract  complete  log
+entries  for  a  given  message, or all mail for a given user, or for a
+given host, for example.
+
+If no file names are given on the command line, the standard input is read.
+
+For known file extensions indicating compression (F<.gz>, F<.bz2>, F<.xz>, and F<.lzma>)
+a suitable de-compressor is used, if available.
+
+=head1 OPTIONS
+
+=over
+
+=item B<-l>
+
+This means 'literal', that is, treat all characters in the
+pattern  as standing for themselves.  Otherwise the pattern must be a
+Perl regular expression.  The pattern match is case-insensitive.
+
+=item B<-t> I<seconds>
+
+Limit the output to messages that spent at least I<seconds> in the
+queue.
+
+=item B<-I>
+
+Do a case sensitive search.
+
+=item B<-v>
+
+Invert the meaning of the search pattern. That is, print message log
+entries that are not related to that pattern.
+
+=item B<-M>
+
+Search for related messages too.
+
+=item B<-h>
+
+Print a short reference help. For more detailed help try L<exigrep(8)>,
+or C<exigrep -m>.
+
+=item B<-m>
+
+Print this manual page of B<exigrep>.
+
+=back
+
+=head1 SEE ALSO
+
+L<exim(8)>, L<perlre(1)>, L<Exim|http://exim.org/>
+
+=head1 AUTHOR
+
+This  manual  page  was stitched together from spec.txt by Andreas Metzler L<ametzler at downhill.at.eu.org>
+and updated by Heiko Schlittermann L<hs@schlittermann.de>.
+
+=cut