On Sun, 27 Apr 2003, Ulrich Drepper wrote:
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> Davide Libenzi wrote:
>
> > This is very much library stuff. I don't think that saving a couple of
> > system calls will give you an edge, expecially when we're talking of
> > spawning another process. Even if the process itself does nothing but
> > return. Ulrich might be eventually interested ...
>
> POSIX has a spawn interface, see <spawn.h> on modern systems.
^^^^^^^^^^^^^^
( You want to make me pay for the last question about swapcontext in our
old glibc environment, don't you ? ;)
If I read the specification correctly, the posix_spwan() interface will
not solve scalability problems due to huge file tables. If I read it
correctly, and if you have M files currently opened and you want to
keep/dup only three files, you have to drop (M-3) close actions plus 3 dup
actions. To solve such problem you'd need a default-all-closed option plus
3 dup actions. That inside the kernel will translate in a brand new file
table plus 3 links.
- Davide
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