1 files changed, 117 insertions, 0 deletions
diff --git a/grub-core/commands/sleep.c b/grub-core/commands/sleep.c
new file mode 100644
index 0000000..a1370b7
--- /dev/null
+++ b/grub-core/commands/sleep.c
@@ -0,0 +1,117 @@
+/* sleep.c - Command to wait a specified number of seconds.  */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2006,2007,2008  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/term.h>
+#include <grub/time.h>
+#include <grub/types.h>
+#include <grub/misc.h>
+#include <grub/extcmd.h>
+#include <grub/i18n.h>
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+static const struct grub_arg_option options[] =
+  {
+    {"verbose", 'v', 0, N_("Verbose countdown."), 0, 0},
+    {"interruptible", 'i', 0, N_("Allow to interrupt with ESC."), 0, 0},
+    {0, 0, 0, 0, 0, 0}
+  };
+
+static struct grub_term_coordinate *pos;
+
+static void
+do_print (int n)
+{
+  grub_term_restore_pos (pos);
+  /* NOTE: Do not remove the trailing space characters.
+     They are required to clear the line.  */
+  grub_printf ("%d    ", n);
+  grub_refresh ();
+}
+
+/* Based on grub_millisleep() from kern/generic/millisleep.c.  */
+static int
+grub_interruptible_millisleep (grub_uint32_t ms)
+{
+  grub_uint64_t start;
+
+  start = grub_get_time_ms ();
+
+  while (grub_get_time_ms () - start < ms)
+    if (grub_key_is_interrupt (grub_getkey_noblock ()))
+      return 1;
+
+  return 0;
+}
+
+static grub_err_t
+grub_cmd_sleep (grub_extcmd_context_t ctxt, int argc, char **args)
+{
+  struct grub_arg_list *state = ctxt->state;
+  int n;
+
+  if (argc != 1)
+    return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("one argument expected"));
+
+  n = grub_strtoul (args[0], 0, 10);
+
+  if (n == 0)
+    {
+      /* Either `0' or broken input.  */
+      return 0;
+    }
+
+  grub_refresh ();
+
+  pos = grub_term_save_pos ();
+
+  for (; n; n--)
+    {
+      if (state[0].set)
+	do_print (n);
+
+      if (state[1].set)
+	{
+	  if (grub_interruptible_millisleep (1000))
+	    return 1;
+	}
+      else
+	grub_millisleep (1000);
+    }
+  if (state[0].set)
+    do_print (0);
+
+  return 0;
+}
+
+static grub_extcmd_t cmd;
+
+GRUB_MOD_INIT(sleep)
+{
+  cmd = grub_register_extcmd ("sleep", grub_cmd_sleep, 0,
+			      N_("NUMBER_OF_SECONDS"),
+			      N_("Wait for a specified number of seconds."),
+			      options);
+}
+
+GRUB_MOD_FINI(sleep)
+{
+  grub_unregister_extcmd (cmd);
+}