2008-07-02 Bean <bean123ch@gmail.com>
* conf/common.rmk (bin_UTILITIES): Add grub-editenv. (grub_editenv_SOURCES): New variable. (pkglib_MODULES): Add loadenv.mod. (loadenv_mod_SOURCES): New variable. (loadenv_mod_CFLAGS): Likewise. (loadenv_mod_LDFLAGS): Likewise. * include/grub/envblk.h: New file. * util/envblk.c: New file. * util/grub-editenv.c: New file. * commands/loadenv.c: New file.
This commit is contained in:
bean
parent
d89b76343e
commit
2270f77bea
7 changed files with 973 additions and 124 deletions
257
commands/loadenv.c
Normal file
257
commands/loadenv.c
Normal file
|
|
@ -0,0 +1,257 @@
|
|||
/* loadenv.c - command to load/save environment variable. */
|
||||
/*
|
||||
* GRUB -- GRand Unified Bootloader
|
||||
* Copyright (C) 2008 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/normal.h>
|
||||
#include <grub/dl.h>
|
||||
#include <grub/mm.h>
|
||||
#include <grub/arg.h>
|
||||
#include <grub/file.h>
|
||||
#include <grub/disk.h>
|
||||
#include <grub/misc.h>
|
||||
#include <grub/env.h>
|
||||
#include <grub/envblk.h>
|
||||
#include <grub/partition.h>
|
||||
|
||||
static const struct grub_arg_option options[] =
|
||||
{
|
||||
{"file", 'f', 0, "specify filename", 0, ARG_TYPE_PATHNAME},
|
||||
{0, 0, 0, 0, 0, 0}
|
||||
};
|
||||
|
||||
char buffer[GRUB_ENVBLK_MAXLEN];
|
||||
grub_envblk_t envblk;
|
||||
|
||||
static grub_file_t
|
||||
read_envblk_file (char *filename, void NESTED_FUNC_ATTR read_hook (grub_disk_addr_t sector, unsigned offset, unsigned length))
|
||||
{
|
||||
char *buf = 0;
|
||||
grub_file_t file;
|
||||
|
||||
if (! filename)
|
||||
{
|
||||
char *prefix;
|
||||
|
||||
prefix = grub_env_get ("prefix");
|
||||
if (prefix)
|
||||
{
|
||||
int len;
|
||||
|
||||
len = grub_strlen (prefix);
|
||||
buf = grub_malloc (len + 1 + sizeof (GRUB_ENVBLK_DEFCFG));
|
||||
grub_strcpy (buf, prefix);
|
||||
buf[len] = '/';
|
||||
grub_strcpy (buf + len + 1, GRUB_ENVBLK_DEFCFG);
|
||||
filename = buf;
|
||||
}
|
||||
else
|
||||
{
|
||||
grub_error (GRUB_ERR_FILE_NOT_FOUND, "prefix is not found");
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
file = grub_file_open (filename);
|
||||
grub_free (buf);
|
||||
if (! file)
|
||||
return 0;
|
||||
|
||||
if (read_hook)
|
||||
{
|
||||
if (! file->device->disk)
|
||||
{
|
||||
grub_file_close (file);
|
||||
grub_error (GRUB_ERR_BAD_DEVICE,
|
||||
"this command is available only for disk devices.");
|
||||
return 0;
|
||||
}
|
||||
file->read_hook = read_hook;
|
||||
}
|
||||
|
||||
if (grub_file_read (file, buffer, GRUB_ENVBLK_MAXLEN) != GRUB_ENVBLK_MAXLEN)
|
||||
{
|
||||
grub_file_close (file);
|
||||
grub_error (GRUB_ERR_BAD_FILE_TYPE, "file too short");
|
||||
return 0;
|
||||
}
|
||||
|
||||
envblk = grub_envblk_find (buffer);
|
||||
if (! envblk)
|
||||
{
|
||||
grub_file_close (file);
|
||||
grub_error (GRUB_ERR_BAD_FILE_TYPE, "environment block not found");
|
||||
return 0;
|
||||
}
|
||||
|
||||
return file;
|
||||
}
|
||||
|
||||
static grub_err_t
|
||||
grub_cmd_load_env (struct grub_arg_list *state,
|
||||
int argc __attribute__ ((unused)), char **args __attribute__ ((unused)))
|
||||
|
||||
{
|
||||
grub_file_t file;
|
||||
|
||||
auto int hook (char *name, char *value);
|
||||
int hook (char *name, char *value)
|
||||
{
|
||||
grub_env_set (name, value);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
file = read_envblk_file ((state[0].set) ? state[0].arg : 0, 0);
|
||||
if (! file)
|
||||
return grub_errno;
|
||||
|
||||
grub_file_close (file);
|
||||
|
||||
grub_envblk_iterate (envblk, hook);
|
||||
|
||||
return grub_errno;
|
||||
}
|
||||
|
||||
static grub_err_t
|
||||
grub_cmd_list_env (struct grub_arg_list *state,
|
||||
int argc __attribute__ ((unused)), char **args __attribute__ ((unused)))
|
||||
{
|
||||
grub_file_t file;
|
||||
|
||||
auto int hook (char *name, char *value);
|
||||
int hook (char *name, char *value)
|
||||
{
|
||||
grub_printf ("%s=%s\n", name, value);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
file = read_envblk_file ((state[0].set) ? state[0].arg : 0, 0);
|
||||
if (! file)
|
||||
return grub_errno;
|
||||
|
||||
grub_file_close (file);
|
||||
|
||||
grub_envblk_iterate (envblk, hook);
|
||||
|
||||
return grub_errno;
|
||||
}
|
||||
|
||||
static grub_err_t
|
||||
grub_cmd_save_env (struct grub_arg_list *state, int argc, char **args)
|
||||
{
|
||||
grub_file_t file;
|
||||
grub_disk_t disk;
|
||||
grub_disk_addr_t addr[GRUB_ENVBLK_MAXLEN >> GRUB_DISK_SECTOR_BITS];
|
||||
char buf[GRUB_DISK_SECTOR_SIZE];
|
||||
grub_disk_addr_t part_start = 0;
|
||||
int num = 0;
|
||||
|
||||
auto void NESTED_FUNC_ATTR hook (grub_disk_addr_t sector, unsigned offset,
|
||||
unsigned length);
|
||||
|
||||
void NESTED_FUNC_ATTR hook (grub_disk_addr_t sector,
|
||||
unsigned offset, unsigned length)
|
||||
{
|
||||
if ((offset != 0) || (length != GRUB_DISK_SECTOR_SIZE))
|
||||
return;
|
||||
|
||||
if (num < (GRUB_ENVBLK_MAXLEN >> GRUB_DISK_SECTOR_BITS))
|
||||
addr[num++] = sector;
|
||||
}
|
||||
|
||||
if (! argc)
|
||||
return grub_error (GRUB_ERR_BAD_ARGUMENT, "No variable is specified");
|
||||
|
||||
file = read_envblk_file ((state[0].set) ? state[0].arg : 0, hook);
|
||||
if (! file)
|
||||
return grub_errno;
|
||||
|
||||
file->read_hook = 0;
|
||||
|
||||
if (num != GRUB_ENVBLK_MAXLEN >> GRUB_DISK_SECTOR_BITS)
|
||||
{
|
||||
grub_error (GRUB_ERR_BAD_DEVICE, "invalid blocklist");
|
||||
goto quit;
|
||||
}
|
||||
|
||||
disk = file->device->disk;
|
||||
if (disk->partition)
|
||||
part_start = grub_partition_get_start (disk->partition);
|
||||
|
||||
for (num = 0; num < (GRUB_ENVBLK_MAXLEN >> GRUB_DISK_SECTOR_BITS); num++)
|
||||
{
|
||||
if (grub_disk_read (disk, addr[num] - part_start, 0,
|
||||
GRUB_DISK_SECTOR_SIZE, buf))
|
||||
goto quit;
|
||||
|
||||
if (grub_memcmp (&buffer[num << GRUB_DISK_SECTOR_BITS], buf,
|
||||
GRUB_DISK_SECTOR_SIZE))
|
||||
{
|
||||
grub_error (GRUB_ERR_BAD_DEVICE, "invalid blocklist");
|
||||
goto quit;
|
||||
}
|
||||
}
|
||||
|
||||
while (argc)
|
||||
{
|
||||
char *value;
|
||||
|
||||
value = grub_env_get (args[0]);
|
||||
if (value)
|
||||
{
|
||||
if (grub_envblk_insert (envblk, args[0], value))
|
||||
{
|
||||
grub_error (GRUB_ERR_BAD_ARGUMENT, "environment block too small");
|
||||
goto quit;
|
||||
}
|
||||
}
|
||||
|
||||
argc--;
|
||||
args++;
|
||||
}
|
||||
|
||||
for (num = 0; num < (GRUB_ENVBLK_MAXLEN >> GRUB_DISK_SECTOR_BITS); num++)
|
||||
if (grub_disk_write (disk, addr[num] - part_start, 0,
|
||||
GRUB_DISK_SECTOR_SIZE,
|
||||
&buffer[num << GRUB_DISK_SECTOR_BITS]))
|
||||
goto quit;
|
||||
|
||||
quit:
|
||||
grub_file_close (file);
|
||||
|
||||
return grub_errno;
|
||||
}
|
||||
|
||||
GRUB_MOD_INIT(loadenv)
|
||||
{
|
||||
(void) mod;
|
||||
grub_register_command ("load_env", grub_cmd_load_env, GRUB_COMMAND_FLAG_BOTH,
|
||||
"load_env [-f FILE]", "Load variables from environment block file.", options);
|
||||
grub_register_command ("list_env", grub_cmd_list_env, GRUB_COMMAND_FLAG_BOTH,
|
||||
"list_env [-f FILE]", "List variables from environment block file.", options);
|
||||
grub_register_command ("save_env", grub_cmd_save_env, GRUB_COMMAND_FLAG_BOTH,
|
||||
"save_env [-f FILE] variable_name [...]", "Save variables to environment block file.", options);
|
||||
}
|
||||
|
||||
GRUB_MOD_FINI(loadenv)
|
||||
{
|
||||
grub_unregister_command ("load_env");
|
||||
grub_unregister_command ("list_env");
|
||||
grub_unregister_command ("save_env");
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue