src/src/exigrep.src

   1 #! PERL_COMMAND
   2
   3 use warnings;
   4 use strict;
   5 BEGIN { pop @INC if $INC[-1] eq '.' };
   6
   7 use Pod::Usage;
   8 use Getopt::Long qw(:config no_ignore_case);
   9 use File::Basename;
  10
  11 # Copyright (c) 2007-2017 University of Cambridge.
  12 # See the file NOTICE for conditions of use and distribution.
  13
  14 # Except when they appear in comments, the following placeholders in this
  15 # source are replaced when it is turned into a runnable script:
  16 #
  17 # PERL_COMMAND
  18 # ZCAT_COMMAND
  19 # COMPRESS_SUFFIX
  20
  21 # PROCESSED_FLAG
  22
  23 # This is a perl script which extracts from an Exim log all entries
  24 # for all messages that have an entry that matches a given pattern.
  25 # If *any* entry for a particular message matches the pattern, *all*
  26 # entries for that message are displayed.
  27
  28 # We buffer up information on a per-message basis. It is done this way rather
  29 # than reading the input twice so that the input can be a pipe.
  30
  31 # There must be one argument, which is the pattern. Subsequent arguments
  32 # are the files to scan; if none, the standard input is read. If any file
  33 # appears to be compressed, it is passed through zcat. We can't just do this
  34 # for all files, because zcat chokes on non-compressed files.
  35
  36 # Performance optimized in 02/02/2007 by Jori Hamalainen
  37 # Typical run time acceleration: 4 times
  38
  39
  40 use POSIX qw(mktime);
  41
  42
  43 # This subroutine converts a time/date string from an Exim log line into
  44 # the number of seconds since the epoch. It handles optional timezone
  45 # information.
  46
  47 sub seconds {
  48 my($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   zst  => { cmd => 'zstdcat', args => '' },
 164 };
 165 my $csearch = 0;
 166
 167 sub detect_compressor_bin
 168   {
 169   my $ext = shift();
 170   my $c = $compressors->{$ext}->{cmd};
 171   $compressors->{$ext}->{bin} = `which $c 2>/dev/null`;
 172   chomp($compressors->{$ext}->{bin});
 173   }
 174
 175 sub detect_compressor_capable
 176   {
 177   my $filename = shift();
 178   map { &detect_compressor_bin($_) } keys %$compressors
 179     if (!$csearch);
 180   $csearch = 1;
 181   return undef
 182     unless (grep {$filename =~ /\.(?:$_)$/} keys %$compressors);
 183   # Loop through them, figure out which one it detected,
 184   # and build the commandline.
 185   my $cmdline = undef;
 186   foreach my $ext (keys %$compressors)
 187     {
 188     if ($filename =~ /\.(?:$ext)$/)
 189       {
 190       # Just die if compressor not found; if this occurs in the middle of
 191       # two valid files with a lot of matches, error could easily be missed.
 192       die("Didn't find $ext decompressor for $filename\n")
 193         if ($compressors->{$ext}->{bin} eq '');
 194       $cmdline = $compressors->{$ext}->{bin} ." ".
 195                    $compressors->{$ext}->{args};
 196       last;
 197       }
 198     }
 199   return $cmdline;
 200   }
 201
 202 sub grep_for_related {
 203   my ($line,$id) = @_;
 204   $id_list{$id} = 1 if $line =~ m/$related_re/;
 205 }
 206
 207 sub get_related_ids {
 208   my ($id) = @_;
 209   push @Mids, $id unless grep /\b$id\b/, @Mids;
 210   my $re = join '|', @Mids;
 211   $related_re = qr/$re/;
 212 }
 213
 214 # The main program. Extract the pattern and make sure any relevant characters
 215 # are quoted if the -l flag is given. The -t flag gives a time-on-queue value
 216 # which is an additional condition. The -M flag will also display "related"
 217 # loglines (msgid from matched lines is searched in following lines).
 218
 219 GetOptions(
 220     'I|sensitive' => sub { $insensitive = 0 },
 221       'l|literal' => \$literal,
 222       'M|related' => \$related,
 223       't|queue-time=i' => \$queue_time,
 224       'pager!'         => \$use_pager,
 225       'v|invert'       => \$invert,
 226       'h|help'         => sub { pod2usage(-exit => 0, -verbose => 1) },
 227       'm|man'          => sub {
 228         pod2usage(
 229             -exit      => 0,
 230             -verbose   => 2,
 231             -noperldoc => system('perldoc -V 2>/dev/null >&2')
 232         );
 233       },
 234       'version'        => sub {
 235             print basename($0) . ": $0\n",
 236                 "build: EXIM_RELEASE_VERSIONEXIM_VARIANT_VERSION\n",
 237                 "perl(runtime): $]\n";
 238             exit 0;
 239       },
 240 ) and @ARGV or pod2usage;
 241
 242 $pattern = shift @ARGV;
 243 $pattern = quotemeta $pattern if $literal;
 244
 245 # Start a pager if output goes to a terminal
 246 if (-t 1 and $use_pager)
 247   {
 248   # for perl >= v5.10.x: foreach ($ENV{PAGER}//(), 'less', 'more')
 249   foreach (defined $ENV{PAGER} ? $ENV{PAGER} : (), 'less', 'more')
 250     {
 251     local $ENV{LESS} .= ' --no-init --quit-if-one-screen';
 252     open(my $pager, '|-', $_) or next;
 253     select $pager;
 254     last;
 255     }
 256   }
 257
 258 # If file arguments are given, open each one and process according as it is
 259 # is compressed or not.
 260
 261 if (@ARGV)
 262   {
 263   foreach (@ARGV)
 264     {
 265     my $filename = $_;
 266     if (-x 'ZCAT_COMMAND' && $filename =~ /\.(?:COMPRESS_SUFFIX)$/o)
 267       {
 268       open(LOG, "ZCAT_COMMAND $filename |") ||
 269         die "Unable to zcat $filename: $!\n";
 270       }
 271     elsif (my $cmdline = &detect_compressor_capable($filename))
 272       {
 273       open(LOG, "$cmdline $filename |") ||
 274         die "Unable to decompress $filename: $!\n";
 275       }
 276     else
 277       {
 278       open(LOG, "<$filename") || die "Unable to open $filename: $!\n";
 279       }
 280     do_line() while (<LOG>);
 281     close(LOG);
 282     }
 283   }
 284
 285 # If no files are named, process STDIN only
 286
 287 else { do_line() while (<STDIN>); }
 288
 289 # At the end of processing all the input, print any uncompleted messages.
 290
 291 for (keys %id_list)
 292   {
 293   print "+++ $_ has not completed +++\n$saved{$_}\n";
 294   }
 295
 296 __END__
 297
 298 =head1 NAME
 299
 300 exigrep - search Exim's main log
 301
 302 =head1 SYNOPSIS
 303
 304 B<exigrep> [options] pattern [log] ...
 305
 306 =head1 DESCRIPTION
 307
 308 The B<exigrep> utility is a Perl script that searches one or more main log
 309 files for entries that match a given pattern.  When it finds  a  match,
 310 it  extracts  all  the  log  entries for the relevant message, not just
 311 those that match the pattern.  Thus, B<exigrep> can extract  complete  log
 312 entries  for  a  given  message, or all mail for a given user, or for a
 313 given host, for example.
 314
 315 If no file names are given on the command line, the standard input is read.
 316
 317 For known file extensions indicating compression (F<.gz>, F<.bz2>, F<.xz>,
 318 F<.lzma>, and F<.zst>) a suitable de-compressor is used, if available.
 319
 320 The output is sent through a pager if a terminal is connected to STDOUT. As
 321 pager are considered: C<$ENV{PAGER}>, C<less>, C<more>.
 322
 323 =head1 OPTIONS
 324
 325 =over
 326
 327 =item B<-l>|B<--literal>
 328
 329 This means 'literal', that is, treat all characters in the
 330 pattern  as standing for themselves.  Otherwise the pattern must be a
 331 Perl regular expression.  The pattern match is case-insensitive.
 332
 333 =item B<-t>|B<--queue-time> I<seconds>
 334
 335 Limit the output to messages that spent at least I<seconds> in the
 336 queue.
 337
 338 =item B<-I>|B<--sensitive>
 339
 340 Do a case sensitive search.
 341
 342 =item B<-v>|B<--invert>
 343
 344 Invert the meaning of the search pattern. That is, print message log
 345 entries that are not related to that pattern.
 346
 347 =item B<-M>|B<--related>
 348
 349 Search for related messages too.
 350
 351 =item B<--no-pager>
 352
 353 Do not use a pager, even if STDOUT is connected to a terminal.
 354
 355 =item B<-h>|B<--help>
 356
 357 Print a short reference help. For more detailed help try L<exigrep(8)>,
 358 or C<exigrep --man>.
 359
 360 =item B<-m>|B<--man>
 361
 362 Print this manual page of B<exigrep>.
 363
 364 =back
 365
 366 =head1 SEE ALSO
 367
 368 L<exim(8)>, L<perlre(1)>, L<Exim|http://exim.org/>
 369
 370 =head1 AUTHOR
 371
 372 This  manual  page  was stitched together from spec.txt by Andreas Metzler L<ametzler at downhill.at.eu.org>
 373 and updated by Heiko Schlittermann L<hs@schlittermann.de>.
 374
 375 =cut