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Implement grub_file tool and use it to implement generating of config

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This commit is contained in:
Vladimir Serbinenko 2013-12-17 14:39:48 +01:00
parent 296f76068d
commit ec824e0f2a
26 changed files with 1113 additions and 122 deletions
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68
grub-core/commands/fileXX.c Normal file
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/*
* 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 <http://www.gnu.org/licenses/>.
*/
#include <grub/fileid.h>
#include <grub/elfload.h>
int
grub_file_check_netbsdXX (grub_elf_t elf)
{
Elf_Shdr *s, *s0;
grub_size_t shnum = elf->ehdr.ehdrXX.e_shnum;
grub_size_t shentsize = elf->ehdr.ehdrXX.e_shentsize;
grub_size_t shsize = shnum * shentsize;
grub_off_t stroff;
if (!shnum || !shentsize)
return 0;
s0 = grub_malloc (shsize);
if (!s0)
return 0;
if (grub_file_seek (elf->file, elf->ehdr.ehdrXX.e_shoff) == (grub_off_t) -1)
return 0;
if (grub_file_read (elf->file, s0, shsize) != (grub_ssize_t) shsize)
return 0;
s = (Elf_Shdr *) ((char *) s0 + elf->ehdr.ehdrXX.e_shstrndx * shentsize);
stroff = s->sh_offset;
for (s = s0; s < (Elf_Shdr *) ((char *) s0 + shnum * shentsize);
s = (Elf_Shdr *) ((char *) s + shentsize))
{
char name[sizeof(".note.netbsd.ident")];
grub_memset (name, 0, sizeof (name));
if (grub_file_seek (elf->file, stroff + s->sh_name) == (grub_off_t) -1)
return grub_errno;
if (grub_file_read (elf->file, name, sizeof (name)) != (grub_ssize_t) sizeof (name))
{
if (grub_errno)
return grub_errno;
continue;
}
if (grub_memcmp (name, ".note.netbsd.ident",
sizeof(".note.netbsd.ident")) != 0)
continue;
return 1;
}
return 0;
}