1 /* 2 * Copyright (C) 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include <stdio.h> 18 #include <sys/ioctl.h> 19 #include <sys/types.h> 20 #include <sys/stat.h> 21 #include <fcntl.h> 22 #include <unistd.h> 23 24 25 #define CITADEL_IOC_MAGIC 'c' 26 #define CITADEL_IOC_RESET _IO(CITADEL_IOC_MAGIC, 2) 27 28 int main(int argc __attribute__((unused)), char *argv[] __attribute__((unused))) 29 { 30 int fd, r; 31 32 fd = open("/dev/citadel0", O_RDWR); 33 if (fd < 0) { 34 perror("can't open /dev/citadel0"); 35 fprintf(stderr, "did you run \"setprop ctl.stop vendor.citadeld\" ?\n"); 36 return 1; 37 } 38 39 r = ioctl(fd, CITADEL_IOC_RESET); 40 close(fd); 41 42 if (r) { 43 perror("ioctl failed"); 44 return 1; 45 } 46 47 fprintf(stderr, "Citadel should have been reset, AFAICT\n"); 48 49 return 0; 50 } 51
