On 17-apr-2006, at 20:50, Martin v. Löwis wrote:
Ronald Oussoren wrote:
AFAIK readdir is only unsafe when multiple
threads use the same
DIR* at the same time. The spec seems to agree with me.  : http://www.opengroup.org/onlinepubs/009695399/functions/ readdir.html
What specific sentence makes you think so? I see
"The readdir() interface need not be reentrant."
which seems to allow for an implementation that returns a static struct dirent.
A couple of lines down it says:
"The pointer returned by readdir() points to data which may be
overwritten by another call to readdir() on the same directory
stream. This data is not overwritten by another call to readdir() on
a different directory stream."
This explicitly says that implementations cannot use a static dirent
Of course, the most natural implementation associates the storage for the result with the DIR*, so it's probably not a real problem...
If this were a problem on some platform I'd expect it to be so
ancient that it doesn't offer readdir_r either.