fchdir(fd) defect

[Earnie Boyd]

I've discovered that if

chdir("/some/dir/foo")
fd=open(".", O_RDONLY)
chdir("/some/dir/bar")
fchdir(fd) will change to "some/dir/bar" not to "some/dir/foo".

The reason for this is simply that the open stores the "." in the fd
table and not the absolute directory name it points to.  I don't have a
patch for this yet, I wanted to alert to the problem before 1.3.4
released.  Feel free to beat me to the punch with the patch.

Earnie.

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