Re: [Chicken-users] Posix "realpath"

[John Cowan]

Matt Welland scripsit:

> Please consider adding realpath to posix. If I understand correctly
> realpath is a specified part of posix and thus would quite naturally fit
> into the posix unit. 

I agree; having it is a Good Thing, and it's quite portable as well as
being part of POSIX.1-2001 and later.  Unfortunately, there is no Win32
equivalent; it probably should signal an error on Windows rather than
returning an unreliable result.  (It is available in Cygwin.)

Note that the only safe way to use realpath() is to pass NULL as the
second argument, and free() the returned result.  Otherwise you risk
passing a too-small buffer, with the usual bad consequences, and there is
no reliable way to find out how big the buffer ought to be (in particular
PATH_MAX does not work reliably).

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