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