/* * GRUB -- GRand Unified Bootloader * Copyright (C) 2013 Free Software Foundation, Inc. * * GRUB is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * GRUB is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with GRUB. If not, see . */ #include #include #include #include #include #include #include static int is_not_empty_directory (const char *dir) { DIR *d; struct dirent *de; d = opendir (dir); if (!d) return 0; while ((de = readdir (d))) { if (strcmp (de->d_name, ".") == 0 || strcmp (de->d_name, "..") == 0) continue; closedir (d); return 1; } closedir (d); return 0; } static int is_64_kernel (void) { struct utsname un; if (uname (&un) < 0) return 0; return strcmp (un.machine, "x86_64") == 0; } const char * grub_install_get_default_x86_platform (void) { /* On Linux, we need the efivars kernel modules. If no EFI is available this module just does nothing besides a small hello and if we detect efi we'll load it anyway later. So it should be safe to try to load it here. */ grub_util_exec ((const char * []){ "modprobe", "-q", "efivars", NULL }); if (is_not_empty_directory ("/sys/firmware/efi")) { if (is_64_kernel ()) return "x86_64-efi"; else return "i386-efi"; } else if (is_not_empty_directory ("/proc/device-tree")) return "i386-ieee1275"; else return "i386-pc"; }