#!/usr/local/bin/perl
#
## ====================================================================
## The Apache Software License, Version 1.1
##
## Copyright (c) 2000-2002 The Apache Software Foundation.  All rights
## reserved.
##
## Redistribution and use in source and binary forms, with or without
## modification, are permitted provided that the following conditions
## are met:
##
## 1. Redistributions of source code must retain the above copyright
##    notice, this list of conditions and the following disclaimer.
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##    the documentation and/or other materials provided with the
##    distribution.
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## 3. The end-user documentation included with the redistribution,
##    if any, must include the following acknowledgment:
##       "This product includes software developed by the
##        Apache Software Foundation (http://www.apache.org/)."
##    Alternately, this acknowledgment may appear in the software itself,
##    if and wherever such third-party acknowledgments normally appear.
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##    not be used to endorse or promote products derived from this
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## 5. Products derived from this software may not be called "Apache",
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## THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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## SUCH DAMAGE.
## ====================================================================
##
## This software consists of voluntary contributions made by many
## individuals on behalf of the Apache Software Foundation.  For more
## information on the Apache Software Foundation, please see
## <http://www.apache.org/>.
##
## Portions of this software are based upon public domain software
## originally written at the National Center for Supercomputing Applications,
## University of Illinois, Urbana-Champaign.
##
##

#
# This script will take a combined Web server access
# log file and break its contents into separate files.
# It assumes that the first field of each line is the
# virtual host identity (put there by "%v"), and that
# the logfiles should be named that+".log" in the current
# directory.
#
# The combined log file is read from stdin. Records read
# will be appended to any existing log files.
#
%is_open = ();

while ($log_line = <STDIN>) {
    #
    # Get the first token from the log record; it's the
    # identity of the virtual host to which the record
    # applies.
    #
    ($vhost) = split (/\s/, $log_line);
    #
    # Normalize the virtual host name to all lowercase.
    # If it's blank, the request was handled by the default
    # server, so supply a default name.  This shouldn't
    # happen, but caution rocks.
    #
    $vhost = lc ($vhost) or "access";
    #
    # if the vhost contains a "/" or "\", it is illegal so just use 
    # the default log to avoid any security issues due if it is interprted
    # as a directory separator.
    if ($vhost =~ m#[/\\]#) { $vhost = "access" }
    #
    # If the log file for this virtual host isn't opened
    # yet, do it now.
    #
    if (! $is_open{$vhost}) {
        open $vhost, ">>${vhost}.log"
            or die ("Can't open ${vhost}.log");
        $is_open{$vhost} = 1;
    }
    #
    # Strip off the first token (which may be null in the
    # case of the default server), and write the edited
    # record to the current log file.
    #
    $log_line =~ s/^\S*\s+//;
    printf $vhost "%s", $log_line;
}
exit 0;