1 files changed, 149 insertions, 0 deletions
diff --git a/grub-core/commands/date.c b/grub-core/commands/date.c
new file mode 100644
index 0000000..5cb4faf
--- /dev/null
+++ b/grub-core/commands/date.c
@@ -0,0 +1,149 @@
+/* date.c - command to display/set current datetime.  */
+/*
+ *  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/dl.h>
+#include <grub/err.h>
+#include <grub/misc.h>
+#include <grub/datetime.h>
+#include <grub/command.h>
+#include <grub/i18n.h>
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+#define GRUB_DATETIME_SET_YEAR		1
+#define GRUB_DATETIME_SET_MONTH		2
+#define GRUB_DATETIME_SET_DAY		4
+#define GRUB_DATETIME_SET_HOUR		8
+#define GRUB_DATETIME_SET_MINUTE	16
+#define GRUB_DATETIME_SET_SECOND	32
+
+static grub_err_t
+grub_cmd_date (grub_command_t cmd __attribute__ ((unused)),
+               int argc, char **args)
+{
+  struct grub_datetime datetime;
+  int limit[6][2] = {{1980, 2079}, {1, 12}, {1, 31}, {0, 23}, {0, 59}, {0, 59}};
+  int value[6], mask;
+
+  if (argc == 0)
+    {
+      if (grub_get_datetime (&datetime))
+        return grub_errno;
+
+      grub_printf ("%d-%02d-%02d %02d:%02d:%02d %s\n",
+                   datetime.year, datetime.month, datetime.day,
+                   datetime.hour, datetime.minute, datetime.second,
+                   grub_get_weekday_name (&datetime));
+
+      return 0;
+    }
+
+  grub_memset (&value, 0, sizeof (value));
+  mask = 0;
+
+  for (; argc; argc--, args++)
+    {
+      const char *p;
+      char c;
+      int m1, ofs, n, cur_mask;
+
+      p = args[0];
+      m1 = grub_strtoul (p, &p, 10);
+
+      c = *p;
+      if (c == '-')
+        ofs = 0;
+      else if (c == ':')
+        ofs = 3;
+      else
+        goto fail;
+
+      value[ofs] = m1;
+      cur_mask = (1 << ofs);
+      mask &= ~(cur_mask * (1 + 2 + 4));
+
+      for (n = 1; (n < 3) && (*p); n++)
+        {
+          if (*p != c)
+            goto fail;
+
+          value[ofs + n] = grub_strtoul (p + 1, &p, 10);
+          cur_mask |= (1 << (ofs + n));
+        }
+
+      if (*p)
+        goto fail;
+
+      if ((ofs == 0) && (n == 2))
+        {
+          value[ofs + 2] = value[ofs + 1];
+          value[ofs + 1] = value[ofs];
+          ofs++;
+          cur_mask <<= 1;
+        }
+
+      for (; n; n--, ofs++)
+        if ((value [ofs] < limit[ofs][0]) ||
+            (value [ofs] > limit[ofs][1]))
+          goto fail;
+
+      mask |= cur_mask;
+    }
+
+  if (grub_get_datetime (&datetime))
+    return grub_errno;
+
+  if (mask & GRUB_DATETIME_SET_YEAR)
+    datetime.year = value[0];
+
+  if (mask & GRUB_DATETIME_SET_MONTH)
+    datetime.month = value[1];
+
+  if (mask & GRUB_DATETIME_SET_DAY)
+    datetime.day = value[2];
+
+  if (mask & GRUB_DATETIME_SET_HOUR)
+    datetime.hour = value[3];
+
+  if (mask & GRUB_DATETIME_SET_MINUTE)
+    datetime.minute = value[4];
+
+  if (mask & GRUB_DATETIME_SET_SECOND)
+    datetime.second = value[5];
+
+  return grub_set_datetime (&datetime);
+
+fail:
+  return grub_error (GRUB_ERR_BAD_ARGUMENT, "invalid datetime");
+}
+
+static grub_command_t cmd;
+
+GRUB_MOD_INIT(date)
+{
+  cmd =
+    grub_register_command ("date", grub_cmd_date,
+			   N_("[[year-]month-day] [hour:minute[:second]]"),
+			   N_("Display/set current datetime."));
+}
+
+GRUB_MOD_FINI(date)
+{
+  grub_unregister_command (cmd);
+}