[patch, libgfortran] Fix for PR 18982

[Thomas Koenig <Thomas dot Koenig at online dot de>]

Here's another go at fixing PR 18982.

Testcase is also attached.

Ok?

2005-01-17  Thomas Koenig <Thomas.Koenig@online.de>

	PR libfortran/18982
	* io/unix.c (regular_file):  No need to change flags->action
	if an error occurs.  Document this.  
	No need to call stat() for STATUS_OLD, open() will
	fail anyway.
	For ACTION_UNSPECIFIED, try open for read-write, then for
	read-only if open fails with EACCES, then for write-only
	if that fails with EACCES again.
	* io/unix.c (open_external): Document changed behavior of
	regular_file.

Attachment: unix.c.diff
Description: Text document

Attachment: open_new.f90
Description: Text document