src/src/exigrep.src

   1 #! PERL_COMMAND
   2
   3 use warnings;
   4 use strict;
   5 BEGIN { pop @INC if $INC[-1] eq '.' };
   6
   7 use Pod::Usage;
   8 use Getopt::Long;
   9 use File::Basename;
  10
  11 # Copyright (c) 2007-2017 University of Cambridge.
  12 # See the file NOTICE for conditions of use and distribution.
  13
  14 # Except when they appear in comments, the following placeholders in this
  15 # source are replaced when it is turned into a runnable script:
  16 #
  17 # PERL_COMMAND
  18 # ZCAT_COMMAND
  19 # COMPRESS_SUFFIX
  20
  21 # PROCESSED_FLAG
  22
  23 # This is a perl script which extracts from an Exim log all entries
  24 # for all messages that have an entry that matches a given pattern.
  25 # If *any* entry for a particular message matches the pattern, *all*
  26 # entries for that message are displayed.
  27
  28 # We buffer up information on a per-message basis. It is done this way rather
  29 # than reading the input twice so that the input can be a pipe.
  30
  31 # There must be one argument, which is the pattern. Subsequent arguments
  32 # are the files to scan; if none, the standard input is read. If any file
  33 # appears to be compressed, it is passed through zcat. We can't just do this
  34 # for all files, because zcat chokes on non-compressed files.
  35
  36 # Performance optimized in 02/02/2007 by Jori Hamalainen
  37 # Typical run time acceleration: 4 times
  38
  39
  40 use POSIX qw(mktime);
  41
  42
  43 # This subroutine converts a time/date string from an Exim log line into
  44 # the number of seconds since the epoch. It handles optional timezone
  45 # information.
  46
  47 sub seconds {
  48 my($year,$month,$day,$hour,$min,$sec,$tzs,$tzh,$tzm) =
  49   $_[0] =~ /^(\d{4})-(\d\d)-(\d\d)\s(\d\d):(\d\d):(\d\d)(?:.\d+)?(?>\s([+-])(\d\d)(\d\d))?/o;
  50
  51 my $seconds = mktime $sec, $min, $hour, $day, $month - 1, $year - 1900;
  52
  53 if (defined $tzs)
  54   {
  55   $seconds -= $tzh * 3600 + $tzm * 60 if $tzs eq "+";
  56   $seconds += $tzh * 3600 + $tzm * 60 if $tzs eq "-";
  57   }
  58
  59 return $seconds;
  60 }
  61
  62
  63 # This subroutine processes a single line (in $_) from a log file. Program
  64 # defensively against short lines finding their way into the log.
  65
  66 my (%saved, %id_list, $pattern);
  67
  68 my $queue_time  = -1;
  69 my $insensitive = 1;
  70 my $invert      = 0;
  71 my $related     = 0;
  72 my $use_pager   = 1;
  73 my $literal     = 0;
  74
  75
  76 # If using "related" option, have to track extra message IDs
  77 my $related_re='';
  78 my @Mids = ();
  79
  80 sub do_line {
  81
  82 # Convert syslog lines to mainlog format, as in eximstats.
  83
  84 if (!/^\d{4}-/o) { $_ =~ s/^.*? exim\b.*?: //o; }
  85
  86 return unless
  87   my($date,$id) = /^(\d{4}-\d\d-\d\d \d\d:\d\d:\d\d(?:\.\d+)? (?:[+-]\d{4} )?)(?:\[\d+\] )?(\w{6}\-\w{6}\-\w{2})?/o;
  88
  89 # Handle the case when the log line belongs to a specific message. We save
  90 # lines for specific messages until the message is complete. Then either print
  91 # or discard.
  92
  93 if (defined $id)
  94   {
  95   $saved{$id} = '' unless defined($saved{$id});
  96
  97   # Save up the data for this message in case it becomes interesting later.
  98
  99   $saved{$id} .= $_;
 100
 101   # Are we interested in this id ? Short circuit if we already were interested.
 102
 103   if ($invert)
 104     {
 105     $id_list{$id} = 1 if (!defined($id_list{$id}));
 106     $id_list{$id} = 0 if (($insensitive && /$pattern/io) || /$pattern/o);
 107     }
 108   else
 109     {
 110     if (defined $id_list{$id} ||
 111       ($insensitive && /$pattern/io) || /$pattern/o)
 112       {
 113       $id_list{$id} = 1;
 114       get_related_ids($id) if $related;
 115       }
 116     elsif ($related && $related_re)
 117       {
 118       grep_for_related($_, $id);
 119       }
 120     }
 121
 122   # See if this is a completion for some message. If it is interesting,
 123   # print it, but in any event, throw away what was saved.
 124
 125   if (index($_, 'Completed') != -1 ||
 126       index($_, 'SMTP data timeout') != -1 ||
 127         (index($_, 'rejected') != -1 &&
 128           /^(\d{4}-\d\d-\d\d \d\d:\d\d:\d\d(?:\.\d+)? (?:[+-]\d{4} )?)(?:\[\d+\] )?\w{6}\-\w{6}\-\w{2} rejected/o))
 129     {
 130     if ($queue_time != -1 &&
 131         $saved{$id} =~ /^(\d{4}-\d\d-\d\d \d\d:\d\d:\d\d ([+-]\d{4} )?)/o)
 132       {
 133       my $old_sec = &seconds($1);
 134       my $sec = &seconds($date);
 135       $id_list{$id} = 0 if $id_list{$id} && $sec - $old_sec <= $queue_time;
 136       }
 137
 138     print "$saved{$id}\n" if ($id_list{$id});
 139     delete $id_list{$id};
 140     delete $saved{$id};
 141     }
 142   }
 143
 144 # Handle the case where the log line does not belong to a specific message.
 145 # Print it if it is interesting.
 146
 147 elsif ( ($invert && (($insensitive && !/$pattern/io) || !/$pattern/o)) ||
 148        (!$invert && (($insensitive &&  /$pattern/io) ||  /$pattern/o)) )
 149   { print "$_\n"; }
 150 }
 151
 152 # Rotated log files are frequently compressed and there are a variety of
 153 # formats it could be compressed with. Rather than use just one that is
 154 # detected and hardcoded at Exim compile time, detect and use what the
 155 # logfile is compressed with on the fly.
 156 #
 157 # List of known compression extensions and their associated commands:
 158 my $compressors = {
 159   gz   => { cmd => 'zcat',  args => '' },
 160   bz2  => { cmd => 'bzcat', args => '' },
 161   xz   => { cmd => 'xzcat', args => '' },
 162   lzma => { cmd => 'lzma',  args => '-dc' }
 163 };
 164 my $csearch = 0;
 165
 166 sub detect_compressor_bin
 167   {
 168   my $ext = shift();
 169   my $c = $compressors->{$ext}->{cmd};
 170   $compressors->{$ext}->{bin} = `which $c 2>/dev/null`;
 171   chomp($compressors->{$ext}->{bin});
 172   }
 173
 174 sub detect_compressor_capable
 175   {
 176   my $filename = shift();
 177   map { &detect_compressor_bin($_) } keys %$compressors
 178     if (!$csearch);
 179   $csearch = 1;
 180   return undef
 181     unless (grep {$filename =~ /\.(?:$_)$/} keys %$compressors);
 182   # Loop through them, figure out which one it detected,
 183   # and build the commandline.
 184   my $cmdline = undef;
 185   foreach my $ext (keys %$compressors)
 186     {
 187     if ($filename =~ /\.(?:$ext)$/)
 188       {
 189       # Just die if compressor not found; if this occurs in the middle of
 190       # two valid files with a lot of matches, error could easily be missed.
 191       die("Didn't find $ext decompressor for $filename\n")
 192         if ($compressors->{$ext}->{bin} eq '');
 193       $cmdline = $compressors->{$ext}->{bin} ." ".
 194                    $compressors->{$ext}->{args};
 195       last;
 196       }
 197     }
 198   return $cmdline;
 199   }
 200
 201 sub grep_for_related {
 202   my ($line,$id) = @_;
 203   $id_list{$id} = 1 if $line =~ m/$related_re/;
 204 }
 205
 206 sub get_related_ids {
 207   my ($id) = @_;
 208   push @Mids, $id unless grep /\b$id\b/, @Mids;
 209   my $re = join '|', @Mids;
 210   $related_re = qr/$re/;
 211 }
 212
 213 # The main program. Extract the pattern and make sure any relevant characters
 214 # are quoted if the -l flag is given. The -t flag gives a time-on-queue value
 215 # which is an additional condition. The -M flag will also display "related"
 216 # loglines (msgid from matched lines is searched in following lines).
 217
 218 GetOptions(
 219     'I|sensitive' => sub { $insensitive = 0 },
 220       'l|literal' => \$literal,
 221       'M|related' => \$related,
 222       't|queue-time=i' => \$queue_time,
 223       'pager!'         => \$use_pager,
 224       'v|invert'       => \$invert,
 225       'h|help'         => sub { pod2usage(-exit => 0, -verbose => 1) },
 226       'm|man'          => sub {
 227         pod2usage(
 228             -exit      => 0,
 229             -verbose   => 2,
 230             -noperldoc => system('perldoc -V 2>/dev/null >&2')
 231         );
 232       },
 233       'version'        => sub {
 234             print basename($0) . ": $0\n",
 235                 "build: EXIM_RELEASE_VERSIONEXIM_VARIANT_VERSION\n",
 236                 "perl(runtime): $^V\n";
 237             exit 0;
 238       },
 239 ) and @ARGV or pod2usage;
 240
 241 $pattern = shift @ARGV;
 242 $pattern = quotemeta $pattern if $literal;
 243
 244 # Start a pager if output goes to a terminal
 245 if (-t 1 and $use_pager)
 246   {
 247   foreach ($ENV{PAGER}//(), 'less', 'more')
 248     {
 249     local $ENV{LESS} .= ' --no-init --quit-if-one-screen';
 250     open(my $pager, '|-', $_) or next;
 251     select $pager;
 252     last;
 253     }
 254   }
 255
 256 # If file arguments are given, open each one and process according as it is
 257 # is compressed or not.
 258
 259 if (@ARGV)
 260   {
 261   foreach (@ARGV)
 262     {
 263     my $filename = $_;
 264     if (-x 'ZCAT_COMMAND' && $filename =~ /\.(?:COMPRESS_SUFFIX)$/o)
 265       {
 266       open(LOG, "ZCAT_COMMAND $filename |") ||
 267         die "Unable to zcat $filename: $!\n";
 268       }
 269     elsif (my $cmdline = &detect_compressor_capable($filename))
 270       {
 271       open(LOG, "$cmdline $filename |") ||
 272         die "Unable to decompress $filename: $!\n";
 273       }
 274     else
 275       {
 276       open(LOG, "<$filename") || die "Unable to open $filename: $!\n";
 277       }
 278     do_line() while (<LOG>);
 279     close(LOG);
 280     }
 281   }
 282
 283 # If no files are named, process STDIN only
 284
 285 else { do_line() while (<STDIN>); }
 286
 287 # At the end of processing all the input, print any uncompleted messages.
 288
 289 for (keys %id_list)
 290   {
 291   print "+++ $_ has not completed +++\n$saved{$_}\n";
 292   }
 293
 294 __END__
 295
 296 =head1 NAME
 297
 298 exigrep - search Exim's main log
 299
 300 =head1 SYNOPSIS
 301
 302 B<exigrep> [options] pattern [log] ...
 303
 304 =head1 DESCRIPTION
 305
 306 The B<exigrep> utility is a Perl script that searches one or more main log
 307 files for entries that match a given pattern.  When it finds  a  match,
 308 it  extracts  all  the  log  entries for the relevant message, not just
 309 those that match the pattern.  Thus, B<exigrep> can extract  complete  log
 310 entries  for  a  given  message, or all mail for a given user, or for a
 311 given host, for example.
 312
 313 If no file names are given on the command line, the standard input is read.
 314
 315 For known file extensions indicating compression (F<.gz>, F<.bz2>, F<.xz>, and F<.lzma>)
 316 a suitable de-compressor is used, if available.
 317
 318 The output is sent through a pager if a terminal is connected to STDOUT. As
 319 pager are considered: C<$ENV{PAGER}>, C<less>, C<more>.
 320
 321 =head1 OPTIONS
 322
 323 =over
 324
 325 =item B<-l>|B<--literal>
 326
 327 This means 'literal', that is, treat all characters in the
 328 pattern  as standing for themselves.  Otherwise the pattern must be a
 329 Perl regular expression.  The pattern match is case-insensitive.
 330
 331 =item B<-t>|B<--queue-time> I<seconds>
 332
 333 Limit the output to messages that spent at least I<seconds> in the
 334 queue.
 335
 336 =item B<-I>|B<--sensitive>
 337
 338 Do a case sensitive search.
 339
 340 =item B<-v>|B<--invert>
 341
 342 Invert the meaning of the search pattern. That is, print message log
 343 entries that are not related to that pattern.
 344
 345 =item B<-M>|B<--related>
 346
 347 Search for related messages too.
 348
 349 =item B<--no-pager>
 350
 351 Do not use a pager, even if STDOUT is connected to a terminal.
 352
 353 =item B<-h>|B<--help>
 354
 355 Print a short reference help. For more detailed help try L<exigrep(8)>,
 356 or C<exigrep -m>.
 357
 358 =item B<-m>|B<--man>
 359
 360 Print this manual page of B<exigrep>.
 361
 362 =back
 363
 364 =head1 SEE ALSO
 365
 366 L<exim(8)>, L<perlre(1)>, L<Exim|http://exim.org/>
 367
 368 =head1 AUTHOR
 369
 370 This  manual  page  was stitched together from spec.txt by Andreas Metzler L<ametzler at downhill.at.eu.org>
 371 and updated by Heiko Schlittermann L<hs@schlittermann.de>.
 372
 373 =cut