lib/libc/devctl/posix_devctl.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20


#include <devctl.h> // for posix_devctl, size_t
#include <errno.h>  // for errno
#include <libc.h>   // for __unused
#include <stddef.h>
#include <syscall.h> // for __syscall_3, syscall

int posix_devctl(int fildes, int dcmd, void *restrict dev_data_ptr,
		 size_t __unused nbyte, int *restrict dev_info_ptr)
{
	long r;

	if ((r = syscall(ioctl, fildes, dcmd, dev_data_ptr)) < 0)
		return errno;

	*dev_info_ptr = r;

	return 0;
}