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111 lines
2.6 KiB
C
111 lines
2.6 KiB
C
/* datehook.c - Module to install datetime hooks. */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2008 Free Software Foundation, Inc.
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*
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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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*
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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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*
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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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*/
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#include <grub/types.h>
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#include <grub/dl.h>
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#include <grub/env.h>
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#include <grub/misc.h>
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#include <grub/normal.h>
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#include <grub/datetime.h>
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GRUB_MOD_LICENSE ("GPLv3+");
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static const char *grub_datetime_names[] =
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{
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"YEAR",
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"MONTH",
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"DAY",
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"HOUR",
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"MINUTE",
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"SECOND",
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"WEEKDAY",
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};
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static const char *
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grub_read_hook_datetime (struct grub_env_var *var,
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const char *val __attribute__ ((unused)))
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{
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struct grub_datetime datetime;
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static char buf[6];
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buf[0] = 0;
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if (! grub_get_datetime (&datetime))
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{
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int i;
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for (i = 0; i < 7; i++)
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if (grub_strcmp (var->name, grub_datetime_names[i]) == 0)
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{
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int n;
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switch (i)
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{
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case 0:
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n = datetime.year;
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break;
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case 1:
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n = datetime.month;
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break;
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case 2:
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n = datetime.day;
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break;
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case 3:
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n = datetime.hour;
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break;
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case 4:
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n = datetime.minute;
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break;
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case 5:
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n = datetime.second;
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break;
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default:
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return grub_get_weekday_name (&datetime);
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}
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grub_snprintf (buf, sizeof (buf), "%d", n);
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break;
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}
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}
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return buf;
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}
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GRUB_MOD_INIT(datehook)
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{
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unsigned i;
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for (i = 0; i < ARRAY_SIZE (grub_datetime_names); i++)
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{
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grub_register_variable_hook (grub_datetime_names[i],
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grub_read_hook_datetime, 0);
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grub_env_export (grub_datetime_names[i]);
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}
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}
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GRUB_MOD_FINI(datehook)
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{
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unsigned i;
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for (i = 0; i < ARRAY_SIZE (grub_datetime_names); i++)
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{
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grub_register_variable_hook (grub_datetime_names[i], 0, 0);
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grub_env_unset (grub_datetime_names[i]);
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}
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}
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