Re: bugs in cd

[Eric Blake <ebb9@byu.net>]

According to Herbert Xu on 8/31/2009 6:18 AM:
> On Tue, Jul 14, 2009 at 09:39:03PM +0000, Eric Blake wrote:
>> Furthermore, POSIX requires that if the element in CDPATH ends in slash, that 
>> no additional slashes are added while forming the candidate curpath.  In light 
>> of the fact that //home need not be the same directory as /home (and indeed, on 
>> cygwin, they are distinct entities), this is also a bug:
> 
> Can you quote where POSIX says this?

Which version of POSIX are you looking at?  POSIX 2008 added quite a few
clarifications about the handling of // that were not listed in POSIX 2001.

http://www.opengroup.org/onlinepubs/9699919799/utilities/cd.html

"5. Starting with the first pathname in the <colon>-separated pathnames of
CDPATH (see the ENVIRONMENT VARIABLES section) if the pathname is
non-null, test if the concatenation of that pathname, a <slash> character
if that pathname did not end with a <slash> character, and the directory
operand names a directory."...

In other words, if CDPATH is "/", then you should not append any
additional <slash> characters, such that you end up checking for the
existence of "/foo", not "//foo".

-- 
Don't work too hard, make some time for fun as well!

Eric Blake             ebb9@byu.net