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Re: [bug] coreutils: potentially dangerous: $(realpath //) != /




Am 14.03.2018 um 11:58 schrieb Mikhail Usenko via cygwin:
On Mon, 12 Mar 2018 20:43:13 -0500
Eric Blake <...> wrote:

...
Just because Linux has taken the stance that their documented definition
of // is "synonym for /" does NOT mean that ALL POSIX systems have taken
the same approach; Cygwin has taken the approach that "// is documented
to be the root of network access points, distinct from /".

POSIX allows leeway between implementations; this is one of those
documented places where they differ, yet are still both POSIX compliant
with their different choices.  If your script is not robust to what
POSIX has already warned you about, fix your script.

...
If you really claims that Cygwin may and should be different and distinct from all other
existing POSIX systems (the more so that it is allowed by POSIX),
which is not the case. There are other systems where // is the network root.
then it would probably be more obvious and clear to say this at the very begining, e.g.
"Get that Linux feeling (with all those differents and distinctions) - on Windows"
Considering that due to the limitations of being embedded in Windows, Cygwin cannot always perfectly mimic either Linux or POSIX systems, I personally prefer the more generic approach to define POSIX as its model.
------
Thomas

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