tools/android/adb_reboot/adb_reboot.c

   1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include <sys/types.h>
   6 #include <sys/stat.h>
   7 #include <stdio.h>
   8 #include <stdlib.h>
   9 #include <time.h>
  10 #include <unistd.h>
  11
  12 int main(int argc, char ** argv) {
  13   int i = fork();
  14   struct stat ft;
  15   time_t ct;
  16
  17   if (i < 0) {
  18     printf("fork error");
  19     return 1;
  20   }
  21   if (i > 0)
  22     return 0;
  23
  24   /* child (daemon) continues */
  25   int j;
  26   for (j = 0; j < getdtablesize(); j++)
  27     close(j);
  28
  29   setsid(); /* obtain a new process group */
  30
  31   while (1) {
  32     sleep(120);
  33
  34     stat("/sdcard/host_heartbeat", &ft);
  35     time(&ct);
  36     if (ct - ft.st_mtime  > 120) {
  37       /* File was not touched for some time. */
  38       system("su -c stop adbd");
  39       system("sleep 2");
  40       system("su -c start adbd");
  41     }
  42   }
  43
  44   return 0;
  45 }