mango/syscall/handle.c

#include <kernel/sched.h>
#include <kernel/syscall.h>

kern_status_t sys_kern_handle_close(kern_handle_t handle)
{
	struct task *self = current_task();

	return task_close_handle(self, handle);
}

kern_status_t sys_kern_handle_duplicate(
	kern_handle_t handle,
	kern_handle_t *out)
{
	struct task *self = current_task();

	if (!validate_access_w(self, out, sizeof *out)) {
		return KERN_MEMORY_FAULT;
	}

	unsigned long flags;
	task_lock_irqsave(self, &flags);

	struct object *obj = NULL;
	handle_flags_t handle_flags = 0;
	kern_status_t status
		= task_resolve_handle(self, handle, &obj, &handle_flags);
	if (status != KERN_OK) {
		task_unlock_irqrestore(self, flags);
		return status;
	}

	status = task_open_handle(self, obj, handle_flags, out);
	object_unref(obj);

	task_unlock_irqrestore(self, flags);

	return status;
}