Enables or disables N-02E diag interface without root.

N-02E_diag.c

#include <dlfcn.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>

typedef int (*nv_cmd_remote_t)(int, int, void *);

int main(int argc, char *argv[])
{
	int rc;
	void *h;
	nv_cmd_remote_t nv_cmd_remote;
	int disabled;
	unsigned char data[128];
	int fd;
	int one;

	if (argc != 2)
		return 1;
	disabled = !(!!atoi(argv[1]));
	memset(data, 0, sizeof(data));
	one = !disabled;
	fd = open("/dev/diag", O_RDWR);
	h = dlopen("libnv.so", RTLD_NOW);
	nv_cmd_remote = dlsym(h, "nv_cmd_remote");
	/* diag port */
	data[0] = disabled;
	rc = nv_cmd_remote(1, 61171, data);
	/* diag traffic */
	data[0] = !disabled;
	rc |= nv_cmd_remote(1, 61168, data);
	/* /system/bin/ncmdiagd */
	rc | = nv_cmd_remote(1, 61167, data);
	printf("Turn %s DIAG returned %d.\n", disabled ? "OFF" : "ON", rc);
	ioctl(fd, 0x26b, &one);
	close(fd);
	if (rc)
		return 1;
	return 0;
}