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Re: [BUG] directory tree error (probably)

From: Chet Ramey
Subject: Re: [BUG] directory tree error (probably)
Date: Tue, 15 Oct 2013 23:16:23 -0400
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On 10/15/13 10:47 PM, Eric Blake wrote:
> On 10/15/2013 06:57 AM, Martin Brugnara wrote:
>> It seams that "cd [/]{1,}" should take you to the root node. (as showed up
>> by 'ls')
>> But when we try with two "/" something goes wrong:
>>    ls works as to be in the root node,
>>    pwd report "//" as path instead of "/"
>>    the bash line report "//" as path too
> Not a bug. POSIX requires that "//" be implementation-defined, and
> permits implementations where it is a different directory than "/".  At
> least Cygwin behaves this way, using "//" as the root of the
> "//system/share" path notation for accessing other computers on the same
> network.  While Linux happens to have an implementation definition that
> "//" and "/" are identical, bash has chosen that it is easier to always
> handle "//" specially than to try to determine whether a particular
> system treats it as distinct or normalizes it.

The Posix specification of `cd' requires that the cd builtin only collapse
three or more leading slashes to a single slash.


step 8c.

- -- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU    address@hidden    http://cnswww.cns.cwru.edu/~chet/
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