upgraded/upgraded.c

   1 /*
   2  * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
   3  * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU Lesser General Public License version 2.1
   7  * as published by the Free Software Foundation
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #include <sys/reboot.h>
  16
  17 #include <stdio.h>
  18 #include <stdlib.h>
  19 #include <string.h>
  20 #include <unistd.h>
  21
  22 #include <libubox/uloop.h>
  23
  24 #include "../watchdog.h"
  25
  26 static struct uloop_process upgrade_proc;
  27 unsigned int debug = 2;
  28
  29 static void upgrade_proc_cb(struct uloop_process *proc, int ret)
  30 {
  31         if (ret)
  32                 fprintf(stderr, "sysupgrade aborted with return code: %d\n", ret);
  33         uloop_end();
  34 }
  35
  36 static void sysupgarde(char *folder)
  37 {
  38         char *args[] = { "/sbin/sysupgrade", "nand", NULL, NULL };
  39
  40         args[2] = folder;
  41         upgrade_proc.cb = upgrade_proc_cb;
  42         upgrade_proc.pid = fork();
  43         if (!upgrade_proc.pid) {
  44                 execvp(args[0], args);
  45                 fprintf(stderr, "Failed to fork sysupgrade\n");
  46                 exit(-1);
  47         }
  48         if (upgrade_proc.pid <= 0) {
  49                 fprintf(stderr, "Failed to start sysupgarde\n");
  50                 uloop_end();
  51         }
  52 }
  53
  54 int main(int argc, char **argv)
  55 {
  56         pid_t p = getpid();
  57
  58         chdir("/tmp");
  59
  60         if (p != 1) {
  61                 fprintf(stderr, "this tool needs to run as pid 1\n");
  62                 return -1;
  63         }
  64         if (argc != 2) {
  65                 fprintf(stderr, "sysupgrade stage 2 failed, no folder specified\n");
  66                 return -1;
  67         }
  68
  69         uloop_init();
  70         watchdog_init(0);
  71         sysupgarde(argv[1]);
  72         uloop_run();
  73
  74         reboot(RB_AUTOBOOT);
  75
  76         return 0;
  77 }