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From: Brendan Byrd <Perl AT ResonatorSoft DOT org>
Subject: Junctions + "pwd -P" = only skin deep resolution
Date: Thu, 9 May 2013 00:49:15 +0000 (UTC)
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Junctions seem to respond differently to symlinks with commands like "pwd -
P", getcwd(), or Perl's Cwd::getcwd.  This is the last stop of a wild goose 
chase for a bug that I thought was centered around File::chdir.  More 
details here:

https://rt.cpan.org/Ticket/Display.html?id=84988

However, upon further inspection, the buck stop here.  Here's the problem:

Let's say I have a junction of /var/bin pointing to /usr/local/bin.  It 
looks just like a symlink in a "ls -l" on /var

lrwxrwxrwx  1 bbyrd Domain Users 14 May  8 20:23 bin -> /usr/local/bin

So, starting from /var, here's what I get from "pwd -P":

bbyrd AT PC:/var$ pwd -P
/var
bbyrd AT PC:/var$ cd bin
bbyrd AT PC:/var/bin$ pwd -P
/usr/local/bin
bbyrd AT PC:/var/bin$ mkdir asd
bbyrd AT PC:/var/bin$ cd asd
bbyrd AT PC:/var/bin/asd$ pwd -P
/var/bin/asd

What the hell?  Everything was going fine until you dive deeper into the 
directory, past the junction point.  This should have read 
"/usr/local/bin/asd", since the "-P" means to find ALL of the symlinks and 
resolve them.

This actually works exactly like that with symlinks, but symlinks suck 
outside of Cygwin.  (Windows just gives me a stupid "System folder" in 
Explorer.)  I'd like to have the best of both worlds: Junctions that play 
nice in both Cygwin and Windows.


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