int
cloudabi_sys_fd_datasync(struct thread *td,
struct cloudabi_sys_fd_datasync_args *uap)
{
struct fsync_args fsync_args = {
.fd = uap->fd
};
/* Call into fsync(), as FreeBSD lacks fdatasync(). */
return (sys_fsync(td, &fsync_args));
}
int
cloudabi_sys_fd_dup(struct thread *td, struct cloudabi_sys_fd_dup_args *uap)
{
return (kern_dup(td, FDDUP_NORMAL, 0, uap->from, 0));
}
int
cloudabi_sys_fd_replace(struct thread *td,
struct cloudabi_sys_fd_replace_args *uap)
{
int error;
/*
* CloudABI's equivalent to dup2(). CloudABI processes should
* not depend on hardcoded file descriptor layouts, but simply
* use the file descriptor numbers that are allocated by the
* kernel. Duplicating file descriptors to arbitrary numbers
* should not be done.
*
* Invoke kern_dup() with FDDUP_MUSTREPLACE, so that we return
* EBADF when duplicating to a nonexistent file descriptor. Also
* clear the return value, as this system call yields no return
* value.
*/
error = kern_dup(td, FDDUP_MUSTREPLACE, 0, uap->from, uap->to);
td->td_retval[0] = 0;
return (error);
}
int
cloudabi_sys_fd_dup(struct thread *td, struct cloudabi_sys_fd_dup_args *uap)
{
return (kern_dup(td, FDDUP_NORMAL, 0, uap->from, 0));
}