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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 26052] New: - DOCUMENT_ROOT environment variable set incorrectly with VirtualDocumentRoot
Date Mon, 12 Jan 2004 09:55:52 GMT
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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=26052

DOCUMENT_ROOT environment variable set incorrectly with VirtualDocumentRoot

           Summary: DOCUMENT_ROOT environment variable set incorrectly with
                    VirtualDocumentRoot
           Product: Apache httpd-1.3
           Version: 1.3.29
          Platform: All
        OS/Version: Other
            Status: NEW
          Severity: Normal
          Priority: Other
         Component: mod_vhost_alias
        AssignedTo: bugs@httpd.apache.org
        ReportedBy: petzke@teltarif.de


When calling CGI scripts, apache usually sets the DOCUMENT_ROOT environment
variable before calling the script. This can be used within CGI scripts to find
related files. However, DOCUMENT_ROOT seems to be set to a wrong default value,
when using VirtualDocumentRoot as follows:

<VirtualHost myiP>
    ServerName name1.domain.tld
    ServerAlias name2.domain.tld
    ServerAlias name3.domain.tld
    ...
    UseCanonicalName off
    VirtualDocumentRoot /home/%-3/wwwdir
    VirtualScriptAlias /home/%-3/wwwdir/cgi-bin
</VirtualHost>

In my opinion, the DOCUMENT_ROOT environment should be set to whatever
VirtualDocumentRoot expanded to, when calling a CGI script.

The problem has been verified with 1.3.29. It occured both with scripts called
directly or via an action handler (see apache configuration command "Action" and
"AddHandler"). If a CGI script is called via "Action" and "AddHandler", it
typically uses DOCUMENT_ROOT and REQUEST_URI to locate the file, that it has to
process. So the wrong DOCUMENT_ROOT is a serious issue in this case. In
particular, if PHP is not compiled into apache, but executed as a seperate
script, running PHP scripts might fail completely in an environment, that uses
VirtualDocumentRoot!


Kai Petzke

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