arch/all-pc/boot/grub2-aros/grub-core/commands/date.c

   1 /* date.c - command to display/set current datetime.  */
   2 /*
   3  *  GRUB  --  GRand Unified Bootloader
   4  *  Copyright (C) 2008  Free Software Foundation, Inc.
   5  *
   6  *  GRUB is free software: you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation, either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  GRUB is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <grub/dl.h>
  21 #include <grub/err.h>
  22 #include <grub/misc.h>
  23 #include <grub/datetime.h>
  24 #include <grub/command.h>
  25 #include <grub/i18n.h>
  26
  27 GRUB_MOD_LICENSE ("GPLv3+");
  28
  29 #define GRUB_DATETIME_SET_YEAR          1
  30 #define GRUB_DATETIME_SET_MONTH         2
  31 #define GRUB_DATETIME_SET_DAY           4
  32 #define GRUB_DATETIME_SET_HOUR          8
  33 #define GRUB_DATETIME_SET_MINUTE        16
  34 #define GRUB_DATETIME_SET_SECOND        32
  35
  36 static grub_err_t
  37 grub_cmd_date (grub_command_t cmd __attribute__ ((unused)),
  38                int argc, char **args)
  39 {
  40   struct grub_datetime datetime;
  41   int limit[6][2] = {{1980, 2079}, {1, 12}, {1, 31}, {0, 23}, {0, 59}, {0, 59}};
  42   int value[6], mask;
  43
  44   if (argc == 0)
  45     {
  46       if (grub_get_datetime (&datetime))
  47         return grub_errno;
  48
  49       grub_printf ("%d-%02d-%02d %02d:%02d:%02d %s\n",
  50                    datetime.year, datetime.month, datetime.day,
  51                    datetime.hour, datetime.minute, datetime.second,
  52                    grub_get_weekday_name (&datetime));
  53
  54       return 0;
  55     }
  56
  57   grub_memset (&value, 0, sizeof (value));
  58   mask = 0;
  59
  60   for (; argc; argc--, args++)
  61     {
  62       char *p, c;
  63       int m1, ofs, n, cur_mask;
  64
  65       p = args[0];
  66       m1 = grub_strtoul (p, &p, 10);
  67
  68       c = *p;
  69       if (c == '-')
  70         ofs = 0;
  71       else if (c == ':')
  72         ofs = 3;
  73       else
  74         goto fail;
  75
  76       value[ofs] = m1;
  77       cur_mask = (1 << ofs);
  78       mask &= ~(cur_mask * (1 + 2 + 4));
  79
  80       for (n = 1; (n < 3) && (*p); n++)
  81         {
  82           if (*p != c)
  83             goto fail;
  84
  85           value[ofs + n] = grub_strtoul (p + 1, &p, 10);
  86           cur_mask |= (1 << (ofs + n));
  87         }
  88
  89       if (*p)
  90         goto fail;
  91
  92       if ((ofs == 0) && (n == 2))
  93         {
  94           value[ofs + 2] = value[ofs + 1];
  95           value[ofs + 1] = value[ofs];
  96           ofs++;
  97           cur_mask <<= 1;
  98         }
  99
 100       for (; n; n--, ofs++)
 101         if ((value [ofs] < limit[ofs][0]) ||
 102             (value [ofs] > limit[ofs][1]))
 103           goto fail;
 104
 105       mask |= cur_mask;
 106     }
 107
 108   if (grub_get_datetime (&datetime))
 109     return grub_errno;
 110
 111   if (mask & GRUB_DATETIME_SET_YEAR)
 112     datetime.year = value[0];
 113
 114   if (mask & GRUB_DATETIME_SET_MONTH)
 115     datetime.month = value[1];
 116
 117   if (mask & GRUB_DATETIME_SET_DAY)
 118     datetime.day = value[2];
 119
 120   if (mask & GRUB_DATETIME_SET_HOUR)
 121     datetime.hour = value[3];
 122
 123   if (mask & GRUB_DATETIME_SET_MINUTE)
 124     datetime.minute = value[4];
 125
 126   if (mask & GRUB_DATETIME_SET_SECOND)
 127     datetime.second = value[5];
 128
 129   return grub_set_datetime (&datetime);
 130
 131 fail:
 132   return grub_error (GRUB_ERR_BAD_ARGUMENT, "invalid datetime");
 133 }
 134
 135 static grub_command_t cmd;
 136
 137 GRUB_MOD_INIT(date)
 138 {
 139   cmd =
 140     grub_register_command ("date", grub_cmd_date,
 141                            N_("[[year-]month-day] [hour:minute[:second]]"),
 142                            N_("Display/set current datetime."));
 143 }
 144
 145 GRUB_MOD_FINI(date)
 146 {
 147   grub_unregister_command (cmd);
 148 }