unlink safe before close?

[Ron Kuris]

I heard from someone in our organization that the following code
was non-portable.  Does anyone know of some machines were it does
not work?  Obviously MS/DOS will fail (but who cares?).

The intent is to create a temporary file that noone else
can conflict with, and is automatically removed when the program
terminates (either normally or abnormally):

main()
{
    int fd;
    if ((fd = creat("/tmp/who-cares", 0600)) < 0)
	{
	/* failure code... */
	}
    unlink("/tmp/who-cares");
    /* initialize some-stuff and some-size here with whatever */
    write(fd, some-stuff, some-size);
    /* do whatever else you want with the fd: reads, writes, etc */
    .
    .
    .
    /* finally just exit which closes and cleans up everything */
    exit(0);
}

Note that if a core occurs somewhere in the . . . area, the file will
automatically be erased.  I think this is pretty peachy :-).

Comments?
-- 
Ron Kuris		(916) 920-9092
rk at unify.UUCP
{{ucdavis,csun,lll-crg}!csusac,pyramid,sequent}!unify!rk