Re: Introduce posix_spawn

[Barath Aron]

On 9/7/18 4:54 AM, Dale R. Worley wrote:
> Couldn't you change the w.d. to the correct target, spawn, and then
> change the w.d. back?
Yes, one could do this.
> Alternatively, one could direct the spawned process to run a program
> that would set the working directory to, say, the first argument, and
> then use the remaining arguments to run/fork/spawn the target program.
Do you know systems that have this program? What is the name of this 
utility program?
> Indeed, I would expect Threos to have a system program to do exactly
> this, since other people must have seen the same problem.

Actually, this particular problem can be easily solved on Threos, 
because the posix_spawn() API offers a function for this:
int posix_spawn_file_actions_addchdir_np(posix_spawn_file_actions_t* 
__restrict file_actions, const char* __restrict path);

Note the "np" at the end, it means "non portable". I also found 
references on Oracle's webpage [1].

Aron


[1] 
https://docs.oracle.com/cd/E86824_01/html/E54766/posix-spawn-file-actions-addchdir-np-3c.html