64 lines
1.9 KiB
C
64 lines
1.9 KiB
C
/* editenv.c - tool to edit environment block. */
|
|
/*
|
|
* GRUB -- GRand Unified Bootloader
|
|
* Copyright (C) 2008,2009,2010,2013 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 <config.h>
|
|
#include <grub/types.h>
|
|
#include <grub/emu/misc.h>
|
|
#include <grub/util/misc.h>
|
|
#include <grub/lib/envblk.h>
|
|
#include <grub/i18n.h>
|
|
#include <grub/emu/hostfile.h>
|
|
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
|
|
#define DEFAULT_ENVBLK_SIZE 1024
|
|
|
|
void
|
|
grub_util_create_envblk_file (const char *name)
|
|
{
|
|
FILE *fp;
|
|
char *buf;
|
|
char *namenew;
|
|
|
|
buf = xmalloc (DEFAULT_ENVBLK_SIZE);
|
|
|
|
namenew = xasprintf ("%s.new", name);
|
|
fp = grub_util_fopen (namenew, "wb");
|
|
if (! fp)
|
|
grub_util_error (_("cannot open `%s': %s"), namenew,
|
|
strerror (errno));
|
|
|
|
memcpy (buf, GRUB_ENVBLK_SIGNATURE, sizeof (GRUB_ENVBLK_SIGNATURE) - 1);
|
|
memset (buf + sizeof (GRUB_ENVBLK_SIGNATURE) - 1, '#',
|
|
DEFAULT_ENVBLK_SIZE - sizeof (GRUB_ENVBLK_SIGNATURE) + 1);
|
|
|
|
if (fwrite (buf, 1, DEFAULT_ENVBLK_SIZE, fp) != DEFAULT_ENVBLK_SIZE)
|
|
grub_util_error (_("cannot write to `%s': %s"), namenew,
|
|
strerror (errno));
|
|
|
|
|
|
grub_util_file_sync (fp);
|
|
free (buf);
|
|
fclose (fp);
|
|
|
|
if (grub_util_rename (namenew, name) < 0)
|
|
grub_util_error (_("cannot rename the file %s to %s"), namenew, name);
|
|
free (namenew);
|
|
}
|