[PATCH] misc: Add mkostempat (BZ 19866)

[Paul Eggert]

On 2026-06-25 14:59, Mark Wielaard wrote:
> If not, can we have a simple mkstempat one that just adds the dirfd
> argument, but doesn't try to fix any other issue?

We could, but there is always one more feature that people want. For 
example, if/when Linux adds O_CREAT|O_DIRECTORY support to openat2, or a 
mkdirat2 API (or whatever), we'll need yet another function to make this 
new kernel facility available in the mkdtemp family.

In the end it's simpler to have a function with a callback.

Gnulib supports historical or standardized variants like 
gen_register_open_temp, gen_tempname_len, mkdtemp, mkostemp, mkostemps, 
mkstemp, mkstemps, and tmpfile. What a mess, right! But once we have a 
callback-oriented function we don't need to add more to the mess. And in 
Gnulib these variants are all implemented atop a callback-oriented 
function anyway.