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/* datehook.c - Module to install datetime hooks. */
/*
* 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/types.h>
#include <grub/dl.h>
#include <grub/env.h>
#include <grub/misc.h>
#include <grub/normal.h>
#include <grub/datetime.h>
GRUB_MOD_LICENSE ("GPLv3+");
static const char *grub_datetime_names[] =
{
"YEAR",
"MONTH",
"DAY",
"HOUR",
"MINUTE",
"SECOND",
"WEEKDAY",
};
static const char *
grub_read_hook_datetime (struct grub_env_var *var,
const char *val __attribute__ ((unused)))
{
struct grub_datetime datetime;
static char buf[6];
buf[0] = 0;
if (! grub_get_datetime (&datetime))
{
int i;
for (i = 0; i < 7; i++)
if (grub_strcmp (var->name, grub_datetime_names[i]) == 0)
{
int n;
switch (i)
{
case 0:
n = datetime.year;
break;
case 1:
n = datetime.month;
break;
case 2:
n = datetime.day;
break;
case 3:
n = datetime.hour;
break;
case 4:
n = datetime.minute;
break;
case 5:
n = datetime.second;
break;
default:
return grub_get_weekday_name (&datetime);
}
grub_snprintf (buf, sizeof (buf), "%d", n);
break;
}
}
return buf;
}
GRUB_MOD_INIT(datehook)
{
unsigned i;
for (i = 0; i < ARRAY_SIZE (grub_datetime_names); i++)
{
grub_register_variable_hook (grub_datetime_names[i],
grub_read_hook_datetime, 0);
grub_env_export (grub_datetime_names[i]);
}
}
GRUB_MOD_FINI(datehook)
{
unsigned i;
for (i = 0; i < ARRAY_SIZE (grub_datetime_names); i++)
{
grub_register_variable_hook (grub_datetime_names[i], 0, 0);
grub_env_unset (grub_datetime_names[i]);
}
}
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