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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2013 Free Software Foundation, Inc.
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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#include <grub/misc.h>
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#include <grub/command.h>
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#include <grub/extcmd.h>
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#include <grub/i18n.h>
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#include <grub/file.h>
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#include <grub/xen_file.h>
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#include <grub/efi/pe32.h>
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#include <grub/i386/linux.h>
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#include <grub/machoload.h>
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#include <grub/fileid.h>
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GRUB_MOD_LICENSE ("GPLv3+");
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static const struct grub_arg_option options[] = {
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{"is-i386-xen-pae-domu", 0, 0,
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N_("Check if FILE can be booted as i386 PAE Xen unprivileged guest kernel"),
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{"is-x86_64-xen-domu", 0, 0,
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N_("Check if FILE can be booted as x86_64 Xen unprivileged guest kernel"), 0, 0},
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{"is-x86-xen-dom0", 0, 0,
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N_("Check if FILE can be used as Xen x86 privileged guest kernel"), 0, 0},
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{"is-x86-multiboot", 0, 0,
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N_("Check if FILE can be used as x86 multiboot kernel"), 0, 0},
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{"is-x86-multiboot2", 0, 0,
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N_("Check if FILE can be used as x86 multiboot2 kernel"), 0, 0},
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{"is-arm-linux", 0, 0,
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N_("Check if FILE is ARM Linux"), 0, 0},
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{"is-arm64-linux", 0, 0,
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N_("Check if FILE is ARM64 Linux"), 0, 0},
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{"is-ia64-linux", 0, 0,
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N_("Check if FILE is IA64 Linux"), 0, 0},
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{"is-mips-linux", 0, 0,
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N_("Check if FILE is MIPS Linux"), 0, 0},
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{"is-mipsel-linux", 0, 0,
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N_("Check if FILE is MIPSEL Linux"), 0, 0},
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{"is-sparc64-linux", 0, 0,
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N_("Check if FILE is SPARC64 Linux"), 0, 0},
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{"is-powerpc-linux", 0, 0,
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N_("Check if FILE is POWERPC Linux"), 0, 0},
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{"is-x86-linux", 0, 0,
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N_("Check if FILE is x86 Linux"), 0, 0},
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{"is-x86-linux32", 0, 0,
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N_("Check if FILE is x86 Linux supporting 32-bit protocol"), 0, 0},
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{"is-x86-kfreebsd", 0, 0,
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N_("Check if FILE is x86 kFreeBSD"), 0, 0},
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{"is-i386-kfreebsd", 0, 0,
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N_("Check if FILE is i386 kFreeBSD"), 0, 0},
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{"is-x86_64-kfreebsd", 0, 0,
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N_("Check if FILE is x86_64 kFreeBSD"), 0, 0},
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{"is-x86-knetbsd", 0, 0,
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N_("Check if FILE is x86 kNetBSD"), 0, 0},
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{"is-i386-knetbsd", 0, 0,
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N_("Check if FILE is i386 kNetBSD"), 0, 0},
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{"is-x86_64-knetbsd", 0, 0,
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N_("Check if FILE is x86_64 kNetBSD"), 0, 0},
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N_("Check if FILE is i386 EFI file"), 0, 0},
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{"is-x86_64-efi", 0, 0,
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N_("Check if FILE is x86_64 EFI file"), 0, 0},
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N_("Check if FILE is IA64 EFI file"), 0, 0},
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{"is-arm64-efi", 0, 0,
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N_("Check if FILE is ARM64 EFI file"), 0, 0},
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N_("Check if FILE is ARM EFI file"), 0, 0},
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{"is-hibernated-hiberfil", 0, 0,
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N_("Check if FILE is hiberfil.sys in hibernated state"), 0, 0},
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{"is-x86_64-xnu", 0, 0,
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N_("Check if FILE is x86_64 XNU (Mac OS X kernel)"), 0, 0},
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N_("Check if FILE is i386 XNU (Mac OS X kernel)"), 0, 0},
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N_("Check if FILE is XNU (Mac OS X kernel) hibernated image"), 0, 0},
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{"is-x86-bios-bootsector", 0, 0,
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N_("Check if FILE is BIOS bootsector"), 0, 0},
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OPT_TYPE_MIN = IS_PAE_DOMU,
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OPT_TYPE_MAX = IS_BIOS_BOOTSECTOR
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grub_cmd_file (grub_extcmd_context_t ctxt, int argc, char **args)
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grub_file_t file = 0;
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grub_macho_t macho = 0;
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return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected"));
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for (i = OPT_TYPE_MIN; i <= OPT_TYPE_MAX; i++)
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if (ctxt->state[i].set)
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return grub_error (GRUB_ERR_BAD_ARGUMENT, "multiple types specified");
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return grub_error (GRUB_ERR_BAD_ARGUMENT, "no type specified");
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file = grub_file_open (args[0]);
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case IS_BIOS_BOOTSECTOR:
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if (grub_file_size (file) != 512)
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if (grub_file_seek (file, 510) == (grub_size_t) -1)
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if (grub_file_read (file, &sig, 2) != 2)
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if (sig != grub_cpu_to_le16_compile_time (0xaa55))
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if (grub_file_read (file, &ehdr, sizeof (ehdr)) != sizeof (ehdr))
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if (ehdr.e_ident[EI_MAG0] != ELFMAG0
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|| ehdr.e_ident[EI_MAG1] != ELFMAG1
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|| ehdr.e_ident[EI_MAG2] != ELFMAG2
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|| ehdr.e_ident[EI_MAG3] != ELFMAG3
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|| ehdr.e_ident[EI_VERSION] != EV_CURRENT
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|| ehdr.e_version != EV_CURRENT)
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if (ehdr.e_ident[EI_CLASS] != ELFCLASS64
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|| ehdr.e_ident[EI_DATA] != ELFDATA2LSB
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|| ehdr.e_machine != grub_cpu_to_le16_compile_time (EM_IA_64))
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case IS_SPARC64_LINUX:
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if (grub_file_read (file, &ehdr, sizeof (ehdr)) != sizeof (ehdr))
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if (ehdr.e_ident[EI_MAG0] != ELFMAG0
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|| ehdr.e_ident[EI_MAG1] != ELFMAG1
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|| ehdr.e_ident[EI_MAG2] != ELFMAG2
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|| ehdr.e_ident[EI_MAG3] != ELFMAG3
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|| ehdr.e_ident[EI_VERSION] != EV_CURRENT
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|| ehdr.e_version != EV_CURRENT)
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if (ehdr.e_ident[EI_CLASS] != ELFCLASS64
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|| ehdr.e_ident[EI_DATA] != ELFDATA2MSB)
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if (ehdr.e_machine != grub_cpu_to_le16_compile_time (EM_SPARCV9)
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|| ehdr.e_type != grub_cpu_to_be16_compile_time (ET_EXEC))
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case IS_POWERPC_LINUX:
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if (grub_file_read (file, &ehdr, sizeof (ehdr)) != sizeof (ehdr))
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if (ehdr.e_ident[EI_MAG0] != ELFMAG0
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|| ehdr.e_ident[EI_MAG1] != ELFMAG1
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|| ehdr.e_ident[EI_MAG2] != ELFMAG2
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|| ehdr.e_ident[EI_MAG3] != ELFMAG3
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|| ehdr.e_ident[EI_VERSION] != EV_CURRENT
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|| ehdr.e_version != EV_CURRENT)
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if (ehdr.e_ident[EI_DATA] != ELFDATA2MSB
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|| (ehdr.e_machine != grub_cpu_to_le16_compile_time (EM_PPC)
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grub_cpu_to_le16_compile_time (EM_PPC64)))
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if (ehdr.e_type != grub_cpu_to_be16_compile_time (ET_EXEC)
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&& ehdr.e_type != grub_cpu_to_be16_compile_time (ET_DYN))
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if (grub_file_read (file, &ehdr, sizeof (ehdr)) != sizeof (ehdr))
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if (ehdr.e_ident[EI_MAG0] != ELFMAG0
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|| ehdr.e_ident[EI_MAG1] != ELFMAG1
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|| ehdr.e_ident[EI_MAG2] != ELFMAG2
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|| ehdr.e_ident[EI_MAG3] != ELFMAG3
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|| ehdr.e_ident[EI_VERSION] != EV_CURRENT
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|| ehdr.e_version != EV_CURRENT)
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if (ehdr.e_ident[EI_DATA] != ELFDATA2MSB
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|| ehdr.e_machine != grub_cpu_to_be16_compile_time (EM_MIPS)
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|| ehdr.e_type != grub_cpu_to_be16_compile_time (ET_EXEC))
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case IS_X86_KNETBSD32:
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case IS_X86_KNETBSD64:
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elf = grub_elf_file (file, file->name);
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if (elf->ehdr.ehdr32.e_type != grub_cpu_to_le16_compile_time (ET_EXEC)
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|| elf->ehdr.ehdr32.e_ident[EI_DATA] != ELFDATA2LSB)
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is32 = grub_elf_is_elf32 (elf);
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is64 = grub_elf_is_elf64 (elf);
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if (!is32 && type == IS_X86_KNETBSD32)
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if (!is64 && type == IS_X86_KNETBSD64)
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ret = grub_file_check_netbsd64 (elf);
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ret = grub_file_check_netbsd32 (elf);
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case IS_X86_KFREEBSD:
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case IS_X86_KFREEBSD32:
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case IS_X86_KFREEBSD64:
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if (grub_file_read (file, &ehdr, sizeof (ehdr)) != sizeof (ehdr))
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if (ehdr.e_ident[EI_MAG0] != ELFMAG0
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|| ehdr.e_ident[EI_MAG1] != ELFMAG1
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|| ehdr.e_ident[EI_MAG2] != ELFMAG2
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|| ehdr.e_ident[EI_MAG3] != ELFMAG3
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|| ehdr.e_ident[EI_VERSION] != EV_CURRENT
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|| ehdr.e_version != EV_CURRENT)
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if (ehdr.e_type != grub_cpu_to_le16_compile_time (ET_EXEC)
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|| ehdr.e_ident[EI_DATA] != ELFDATA2LSB)
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if (ehdr.e_ident[EI_OSABI] != ELFOSABI_FREEBSD)
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is32 = (ehdr.e_machine == grub_cpu_to_le16_compile_time (EM_386)
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&& ehdr.e_ident[EI_CLASS] == ELFCLASS32);
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is64 = (ehdr.e_machine == grub_cpu_to_le16_compile_time (EM_X86_64)
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&& ehdr.e_ident[EI_CLASS] == ELFCLASS64);
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if (!is32 && (type == IS_X86_KFREEBSD32 || type == IS_X86_KNETBSD32))
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if (!is64 && (type == IS_X86_KFREEBSD64 || type == IS_X86_KNETBSD64))
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case IS_MIPSEL_LINUX:
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if (grub_file_read (file, &ehdr, sizeof (ehdr)) != sizeof (ehdr))
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if (ehdr.e_ident[EI_MAG0] != ELFMAG0
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|| ehdr.e_ident[EI_MAG1] != ELFMAG1
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|| ehdr.e_ident[EI_MAG2] != ELFMAG2
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|| ehdr.e_ident[EI_MAG3] != ELFMAG3
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|| ehdr.e_ident[EI_VERSION] != EV_CURRENT
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|| ehdr.e_version != EV_CURRENT)
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if (ehdr.e_machine != grub_cpu_to_le16_compile_time (EM_MIPS)
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|| ehdr.e_type != grub_cpu_to_le16_compile_time (ET_EXEC))
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grub_uint32_t sig, sig_pi;
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if (grub_file_read (file, &sig_pi, 4) != 4)
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if (sig_pi == grub_cpu_to_le32_compile_time (0xea000006))
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if (grub_file_seek (file, 0x24) == (grub_size_t) -1)
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if (grub_file_read (file, &sig, 4) != 4)
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if (sig == grub_cpu_to_le32_compile_time (0x016f2818))
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if (grub_file_seek (file, 0x38) == (grub_size_t) -1)
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if (grub_file_read (file, &sig, 4) != 4)
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if (sig == grub_cpu_to_le32_compile_time (0x644d5241))
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case IS_PAE_DOMU ... IS_DOM0:
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struct grub_xen_file_info xen_inf;
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elf = grub_xen_file (file);
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err = grub_xen_get_info (elf, &xen_inf);
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/* Unfortuntely no way to check if kernel supports dom0. */
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if (type == IS_PAE_DOMU)
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ret = (xen_inf.arch == GRUB_XEN_FILE_I386_PAE
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|| xen_inf.arch == GRUB_XEN_FILE_I386_PAE_BIMODE);
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if (type == IS_64_DOMU)
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ret = (xen_inf.arch == GRUB_XEN_FILE_X86_64);
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grub_uint32_t *buffer;
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grub_size_t search_size;
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grub_uint32_t *header;
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if (type == IS_MULTIBOOT2)
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magic = grub_cpu_to_le32_compile_time (0xe85250d6);
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magic = grub_cpu_to_le32_compile_time (0x1BADB002);
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buffer = grub_malloc (search_size);
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len = grub_file_read (file, buffer, search_size);
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/* Look for the multiboot header in the buffer. The header should
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be at least 12 bytes and aligned on a 4-byte boundary. */
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for (header = buffer;
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(char *) buffer + len - (type == IS_MULTIBOOT2 ? 16 : 12))
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|| (header = 0); header += step)
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if (header[0] == magic
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&& !(grub_le_to_cpu32 (header[0])
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+ grub_le_to_cpu32 (header[1])
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+ grub_le_to_cpu32 (header[2])
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+ (type == IS_MULTIBOOT2
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? grub_le_to_cpu32 (header[3]) : 0)))
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struct linux_kernel_header lh;
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if (grub_file_read (file, &lh, sizeof (lh)) != sizeof (lh))
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if (lh.boot_flag != grub_cpu_to_le16_compile_time (0xaa55))
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if (lh.setup_sects > GRUB_LINUX_MAX_SETUP_SECTS)
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/* FIXME: some really old kernels (< 1.3.73) will fail this. */
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grub_cpu_to_le32_compile_time (GRUB_LINUX_MAGIC_SIGNATURE)
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|| grub_le_to_cpu16 (lh.version) < 0x0200)
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if (type == IS_X86_LINUX)
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/* FIXME: 2.03 is not always good enough (Linux 2.4 can be 2.03 and
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still not support 32-bit boot. */
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grub_cpu_to_le32_compile_time (GRUB_LINUX_MAGIC_SIGNATURE)
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|| grub_le_to_cpu16 (lh.version) < 0x0203)
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if (!(lh.loadflags & GRUB_LINUX_FLAG_BIG_KERNEL))
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grub_uint8_t hibr_file_magic[4];
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if (grub_file_read (file, &hibr_file_magic, sizeof (hibr_file_magic))
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!= sizeof (hibr_file_magic))
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if (grub_memcmp ("hibr", hibr_file_magic, sizeof (hibr_file_magic)) ==
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|| grub_memcmp ("HIBR", hibr_file_magic,
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sizeof (hibr_file_magic)) == 0)
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macho = grub_macho_open (args[0], (type == IS_XNU64));
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/* FIXME: more checks? */
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struct grub_xnu_hibernate_header hibhead;
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if (grub_file_read (file, &hibhead, sizeof (hibhead))
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grub_cpu_to_le32_compile_time (GRUB_XNU_HIBERNATE_MAGIC))
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grub_uint32_t pe_offset;
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struct grub_pe32_coff_header coff_head;
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if (grub_file_read (file, signature, 2) != 2)
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if (signature[0] != 'M' || signature[1] != 'Z')
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if ((grub_ssize_t) grub_file_seek (file, 0x3c) == -1)
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if (grub_file_read (file, &pe_offset, 4) != 4)
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if ((grub_ssize_t) grub_file_seek (file, grub_le_to_cpu32 (pe_offset))
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if (grub_file_read (file, signature, 4) != 4)
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if (signature[0] != 'P' || signature[1] != 'E'
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|| signature[2] != '\0' || signature[3] != '\0')
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if (grub_file_read (file, &coff_head, sizeof (coff_head))
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!= sizeof (coff_head))
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if (type == IS_32_EFI
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&& coff_head.machine !=
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grub_cpu_to_le16_compile_time (GRUB_PE32_MACHINE_I386))
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if (type == IS_64_EFI
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&& coff_head.machine !=
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grub_cpu_to_le16_compile_time (GRUB_PE32_MACHINE_X86_64))
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if (type == IS_IA_EFI
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&& coff_head.machine !=
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grub_cpu_to_le16_compile_time (GRUB_PE32_MACHINE_IA64))
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if (type == IS_ARM64_EFI
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&& coff_head.machine !=
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grub_cpu_to_le16_compile_time (GRUB_PE32_MACHINE_ARM64))
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if (type == IS_ARM_EFI
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&& coff_head.machine !=
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grub_cpu_to_le16_compile_time (GRUB_PE32_MACHINE_ARMTHUMB_MIXED))
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if (type == IS_IA_EFI || type == IS_64_EFI || type == IS_ARM64_EFI)
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struct grub_pe64_optional_header o64;
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if (grub_file_read (file, &o64, sizeof (o64)) != sizeof (o64))
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grub_cpu_to_le16_compile_time (GRUB_PE32_PE64_MAGIC))
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grub_cpu_to_le16_compile_time
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(GRUB_PE32_SUBSYSTEM_EFI_APPLICATION))
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if (type == IS_32_EFI || type == IS_ARM_EFI)
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struct grub_pe32_optional_header o32;
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if (grub_file_read (file, &o32, sizeof (o32)) != sizeof (o32))
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grub_cpu_to_le16_compile_time (GRUB_PE32_PE32_MAGIC))
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grub_cpu_to_le16_compile_time
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(GRUB_PE32_SUBSYSTEM_EFI_APPLICATION))
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grub_elf_close (elf);
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grub_macho_close (macho);
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grub_file_close (file);
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if (!ret && (grub_errno == GRUB_ERR_BAD_OS || grub_errno == GRUB_ERR_NONE))
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/* TRANSLATORS: it's a standalone boolean value,
660
opposite of "true". */
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grub_error (GRUB_ERR_TEST_FAILURE, N_("false"));
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static grub_extcmd_t cmd;
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cmd = grub_register_extcmd ("file", grub_cmd_file, 0,
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N_("Check if FILE is of specified type."),
677
grub_unregister_extcmd (cmd);
added
removed
grub-core/commands/file.c
