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 #define _GNU_SOURCE
  16
  17 #include <sys/reboot.h>
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22 #include <unistd.h>
  23 #include <errno.h>
  24
  25 #include <libubox/uloop.h>
  26
  27 #include "../watchdog.h"
  28
  29 static struct uloop_process upgrade_proc;
  30 unsigned int debug = 2;
  31
  32 static void upgrade_proc_cb(struct uloop_process *proc, int ret)
  33 {
  34         if (ret)
  35                 fprintf(stderr, "sysupgrade aborted with return code: %d\n", ret);
  36         uloop_end();
  37 }
  38
  39 static void sysupgarde(char *folder)
  40 {
  41         char *args[] = { "/sbin/sysupgrade", "nand", NULL, NULL };
  42
  43         args[2] = folder;
  44         upgrade_proc.cb = upgrade_proc_cb;
  45         upgrade_proc.pid = fork();
  46         if (!upgrade_proc.pid) {
  47                 execvp(args[0], args);
  48                 fprintf(stderr, "Failed to fork sysupgrade\n");
  49                 exit(-1);
  50         }
  51         if (upgrade_proc.pid <= 0) {
  52                 fprintf(stderr, "Failed to start sysupgarde\n");
  53                 uloop_end();
  54         }
  55 }
  56
  57 int main(int argc, char **argv)
  58 {
  59         pid_t p = getpid();
  60
  61         if (p != 1) {
  62                 fprintf(stderr, "this tool needs to run as pid 1\n");
  63                 return -1;
  64         }
  65         if (chdir("/tmp") == -1) {
  66                 fprintf(stderr, "failed to chdir to /tmp: %s\n", strerror(errno));
  67                 return -1;
  68         }
  69         if (argc != 2) {
  70                 fprintf(stderr, "sysupgrade stage 2 failed, no folder specified\n");
  71                 return -1;
  72         }
  73
  74         uloop_init();
  75         watchdog_init(0);
  76         sysupgarde(argv[1]);
  77         uloop_run();
  78
  79         reboot(RB_AUTOBOOT);
  80
  81         return 0;
  82 }