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Date: Mon, 28 Jul 2003 15:45:32 +0200
From: Remy Maucherat <remm@apache.org>
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To: Tomcat Developers List <tomcat-dev@jakarta.apache.org>
Subject: Re: getCanonicalPath used rather than getAbsolutePath
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David Cassidy wrote:
> Guys,
> 
> We deploy tomcat in a multi-hosting environment. We make rather extensive use of symlinks so that we can
> update the system. ie when the user wants to publish their content the symlink is changed and hey bingo ...
> 
> The problem we're finding is that tomcat is expanding the symlink to the real path. At midnight we kinda
> clean the system so that old dead versions are removed to save disk space etc.
> 
> Of course then tomcat gets broken due the the file not being there.
> I've checked the source of Tomcat 4.1.24 and it seems that getCanonicalPath and getAbsolutePath
> have been used interchangably.
> 
> Is there a reason for this ?
> 
> If not taken as though the two methods return the same(ish *) result can we have getAbsolutePath used
> exclusivly ?

No, sorry.

> * they both return the absolute path, just is getCanonicalPath expands symlinks to the real dir name.

It does much more than that (ex: removing stuff like /./, etc): it is a 
minimal access path to the file (starting from the filesystem root).

Remy


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