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#! /usr/bin/perl
#
# Copyright (C) Heinz-Josef Claes (2000)
# hjclaes@web.de
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
push @VERSION, '$Id: multitail.pl 330 2004-04-18 07:39:13Z hjc $ ';
sub libPath
{
my $file = shift;
my $dir;
# Falls Datei selbst ein symlink ist, solange folgen, bis aufgelst
if (-f $file)
{
while (-l $file)
{
my $link = readlink($file);
if (substr($link, 0, 1) ne "/")
{
$file =~ s/[^\/]+$/$link/;
}
else
{
$file = $link;
}
}
($dir, $file) = &splitFileDir($file);
$file = "/$file";
}
else
{
print STDERR "<$file> does not exist!\n";
exit 1;
}
$dir .= "/../lib"; # Pfad zu den Bibliotheken
my $oldDir = `/bin/pwd`;
chomp $oldDir;
if (chdir $dir)
{
my $absDir = `/bin/pwd`;
chop $absDir;
chdir $oldDir;
return (&splitFileDir("$absDir$file"));
}
else
{
print STDERR "<$dir> does not exist, exiting\n";
}
}
sub splitFileDir
{
my $name = shift;
return ('.', $name) unless ($name =~/\//); # nur einfacher Dateiname
my ($dir, $file) = $name =~ /^(.*)\/(.*)$/s;
$dir = '/' if ($dir eq ''); # gilt, falls z.B. /filename
return ($dir, $file);
}
my ($req, $prog) = &libPath($0);
push @INC, "$req";
require "checkParam.pl";
require "tail.pl";
require "prLog.pl";
require 'version.pl';
$Help = <<EOH;
Read multiple log files. The log files can be written round.
Usage:
$0 [-a] [-d delay] [-p begin|end] [-t]
[-o outFile [-m max] [-P]
[[-n noFiles] | [-s yes|no [-c compressprog]] ]
] files...
-a --addName add filename to the output at the beginning of each line
-d --delay delay in sec. between checking the files (default 5 sec)
-p --position read from begin or end of file (default = begin)
-t --withTime add current time and date to the output
-o --out write output to file
-m --maxFilelen maximal len of file written round (default = 1e6)
-n --noOldFiles number of old files to store
-P --withPID write pid to log file (default is not)
-H --withHostname write hostname to log file (default is not)
-l --maxlines maximal number of lines to read per second in one chunk
from a log file (default = 100)
this value multiplied with [-d] is the number read at once
-s --saveLogs save log files with date and time instead of deleting the
old (with [-noOldFiles]): 'yes' or 'no'
-c --compressWith compress saved log files (e.g. with -c 'gzip -9')
-V print version(s)
Copyright (c) 2001-2004 by Heinz-Josef Claes
Published under the GNU General Public License
EOH
&printVersions(\@ARGV, '-V');
$CheckPar = CheckParam->new('-allowLists' => 'yes',
'-list' => [
Option->new('-option' => '-a',
'-alias' => '--addName'),
Option->new('-option' => '-d',
'-alias' => '--delay',
'-default' => 5),
Option->new('-option' => '-p',
'-alias' => '--position',
'-default' => 'begin',
'-pattern' =>
'^begin$|^end$' # '
),
Option->new('-option' => '-t',
'-alias' => '--withTime'),
Option->new('-option' => '-o',
'-alias' => '--out',
'-param' => 'yes'),
Option->new('-option' => '-m',
'-alias' => '--maxFilelen',
'-default' => 1e6),
Option->new('-option' => '-n',
'-alias' => '--noOldFiles',
'-param' => 'yes',
'-only_if' =>
'[-o] and not ( [-s] or [-c])'),
Option->new('-option' => '-P',
'-alias' => '--withPID'),
Option->new('-option' => '-H',
'-alias' => '--withHostname'),
Option->new('-option' => '-l',
'-alias' => '--maxlines',
'-default' => 100,
'-pattern' => '^\d+$' # '
),
Option->new('-option' => '-s',
'-alias' => '--saveLogs',
'-param' => 'yes',
'-pattern' =>
'^yes$|^no$', #'
'-only_if' =>
'[-o] and not [-n]'),
Option->new('-option' => '-c',
'-alias' => '--compressWith',
'-param' => 'yes',
'-only_if' =>
'[-o] and not [-n]')
]
);
$CheckPar->check('-argv' => \@ARGV,
'-help' => $Help
);
$delay = $CheckPar->getOptWithPar('-d');
$addName = 1 if ($CheckPar->getOptWithoutPar('-a'));
$position = $CheckPar->getOptWithPar('-p');
$withTime = ($CheckPar->getOptWithoutPar('-t')) ? 'yes' : 'no';
$out = $CheckPar->getOptWithPar('-o');
$maxFilelen = $CheckPar->getOptWithPar('-m');
$noOldFiles = $CheckPar->getOptWithPar('-n');
$withPID = $CheckPar->getOptWithoutPar('-P') ? 'yes' : 'no';
$hostname = $CheckPar->getOptWithoutPar('-H') ? `hostname -f` : '';
chomp $hostname;
$maxlines = $CheckPar->getOptWithPar('-l');
$saveLogs = $CheckPar->getOptWithPar('-s');
$compressWith = $CheckPar->getOptWithPar('-c');
unless ($CheckPar->getNoListPar())
{
print "$Help";
exit 1;
}
# Initialisierung
my @files;
my $file;
my $iter = Iter_ParList->new($CheckPar);
while ($file = $iter->next())
{
my $f = ($addName) ? "$file " : '';
push @files, tailOneFile->new('-filename' => $file,
'-position' => $position,
'-prefix' => $f,
'-maxlines' => $maxlines * $d)
}
# Ausgabeobjekt erzeugen
@fileout = ('-file' => $out) if ($out);
$prLog = printLog->new(@fileout,
'-withTime' => $withTime,
'-maxFilelen' => $maxFilelen,
'-noOfOldFiles' => $noOldFiles,
'-saveLogs' => $saveLogs,
'-compressWith' => $compressWith,
'-withPID' => $withPID,
'-hostname' => $hostname
);
my $i = 0;
while (42)
{
my $l = $files[$i]->read();
chop @$l;
# print "@$l\n";
$prLog->pr(@$l);
++$i;
$i %= @files;
select(undef, undef, undef, $delay / @files); # sleep in seconds
}
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