flushdcache.c

#include <mach/mach.h>
#include <IOKit/IOKitLib.h>
#include <stdio.h>
#include <stdlib.h>

const static uint32_t SELpurgeCachedValidationResults = 4;

int main(void) {
	int rv = EXIT_FAILURE;

	io_service_t amfi = IOServiceGetMatchingService(kIOMasterPortDefault, IOServiceMatching("AppleMobileFileIntegrity"));

	if (!MACH_PORT_VALID(amfi)) {
		printf("Cant get service matching amfi\n");
		return rv;
	}

	io_connect_t amfiuc = MACH_PORT_NULL;

	kern_return_t ret = 0;
	ret = IOServiceOpen(amfi, mach_task_self_, 0, &amfiuc);

	if (ret != KERN_SUCCESS) {
		printf("Cant open amfi userclient: 0x%x (%s)\n", ret, mach_error_string(ret));
		IOServiceClose(amfi);
		return rv;
	}

	ret = IOConnectCallMethod(amfiuc, SELpurgeCachedValidationResults, NULL, 0, NULL, 0, NULL, 0, NULL, 0);

	if (ret != KERN_SUCCESS) {
		printf("purgeCachedValidationResults failed: 0x%x (%s)\n", ret, mach_error_string(ret));
	} else {
		rv = EXIT_SUCCESS;
	}

	IOConnectRelease(amfiuc);
	IOServiceClose(amfi);

	return rv;
}