On Sat, 17 Nov 2007 00:31:36 -0500
Ulrich Drepper <[email protected]> wrote:
>
> union indirect_params i;
> i.file_flags.flags = O_CLOEXEC;
This setup forbids future addons to file_flags
In three years, when we want to add a new indirect feature to socket()
call, do we need a new indirect2() syscall ?
So I suggest using :
union indirect_params i = {
.file_flags.flags = O_CLOEXEC,
};
fd = syscall (__NR_indirect, &r, &i, sizeof (i));
Or better, you could avoid using 'union indirect_params' in user code, and
only use the substructs for each function.
/* define this in some include file of course */
struct file_flags {
int flags;
};
/* use it */
struct file_flags ff = { .flags = O_CLOEXEC};
fd = syscall (__NR_indirect, &r, &ff, sizeof(ff));
This to avoid to copy to kernel un-necessary data, and permitting futures changes.
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