[EMAIL PROTECTED] wrote:
[...]
Strictly conformant to the above would therefore be:
#define dirfd(dp) ((dp) ? (dp)->dd_fd : -1)
No. Nothing to do with strictly conformant; while it is possible
to have a DIR * which is NULL, using it immediately gets you undefined
behaviour.
IMHO, implementations MUST NOT protect against that; that way madness
and buggy programs lie.
As a related note glibc has some questionable protections, like
free(NULL)
which it simply ignores resulting in bugs remaining hidden. GNU ls
does a
free(NULL) somewhere which we discovered while demoing truss on linux
processes in BrandZ. It is also visible when you use ltrace in Linux.
Regards,
Moinak.
Casper
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