automake commit without merge history

grub-core/hook/datehook.c

@@ -0,0 +1,105 @@
+/* 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>
+
+static char *grub_datetime_names[] =
+{
+  "YEAR",
+  "MONTH",
+  "DAY",
+  "HOUR",
+  "MINUTE",
+  "SECOND",
+  "WEEKDAY",
+};
+
+static 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]))
+          {
+            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)
+{
+  int i;
+
+  for (i = 0; i < 7; i++)
+    grub_register_variable_hook (grub_datetime_names[i],
+                                 grub_read_hook_datetime, 0);
+}
+
+GRUB_MOD_FINI(datehook)
+{
+  int i;
+
+  for (i = 0; i < 7; i++)
+    {
+      grub_register_variable_hook (grub_datetime_names[i], 0, 0);
+      grub_env_unset (grub_datetime_names[i]);
+    }
+}