Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!cs.utexas.edu!longway!std-unix
From: std-unix@longway.TIC.COM (Moderator, John S. Quarterman)
Newsgroups: comp.std.unix
Subject: Query about <dirent.h>
Message-ID: <437@longway.TIC.COM>
Date: 22 Nov 89 11:38:36 GMT
Reply-To: Andy Tanenbaum <uunet!cs.vu.nl!ast>
Organization: VU Informatica, Amsterdam
Lines: 34
Approved: jsq@longway.tic.com (Moderator, John S. Quarterman)

From: Andy Tanenbaum <uunet!cs.vu.nl!ast>

The <dirent.h> header is required by P1003.1 to have a field
	d_name []

Now the question arises about what size to use there.  One possibility is
	d_name[NAME_MAX+1]

However, doing this means that <limits.h> must be included.  As far as I
can see, the following is a conforming application:

#include <dirent.h>

main()
{
  (void) opendir("/usr");
}

If one uses NAME_MAX in <dirent.h>, we have a conforming application that
won't even compile.

Another solution is to put

#define _NAME_MAX  14

in <dirent.h> and use that (assuming the result of the discussion on
name space pollution permits this).  It might work, but it is hardly
elegant.

What's an implementer to do?

Andy Tanenbaum (ast@cs.vu.nl)

Volume-Number: Volume 17, Number 65