From 041d1ea37802bf7178a31a53f96c26efa6b8fb7b Mon Sep 17 00:00:00 2001
From: James <james.mckenzie@citrix.com>
Date: Fri, 16 Nov 2012 10:41:01 +0000
Subject: fish

---
 grub-core/commands/keystatus.c | 110 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 110 insertions(+)
 create mode 100644 grub-core/commands/keystatus.c

(limited to 'grub-core/commands/keystatus.c')

diff --git a/grub-core/commands/keystatus.c b/grub-core/commands/keystatus.c
new file mode 100644
index 0000000..f3a6699
--- /dev/null
+++ b/grub-core/commands/keystatus.c
@@ -0,0 +1,110 @@
+/* keystatus.c - Command to check key modifier status.  */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2009  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/misc.h>
+#include <grub/extcmd.h>
+#include <grub/term.h>
+#include <grub/i18n.h>
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+static const struct grub_arg_option options[] =
+  {
+    {"shift", 's', 0, N_("Check Shift key."), 0, 0},
+    {"ctrl", 'c', 0, N_("Check Control key."), 0, 0},
+    {"alt", 'a', 0, N_("Check Alt key."), 0, 0},
+    {0, 0, 0, 0, 0, 0}
+  };
+
+static int
+grub_getkeystatus (void)
+{
+  int status = 0;
+  grub_term_input_t term;
+
+  if (grub_term_poll_usb)
+    grub_term_poll_usb ();
+
+  FOR_ACTIVE_TERM_INPUTS(term)
+  {
+    if (term->getkeystatus)
+      status |= term->getkeystatus (term);
+  }
+
+  return status;
+}
+
+static grub_err_t
+grub_cmd_keystatus (grub_extcmd_context_t ctxt,
+		    int argc __attribute__ ((unused)),
+		    char **args __attribute__ ((unused)))
+{
+  struct grub_arg_list *state = ctxt->state;
+  int expect_mods = 0;
+  int mods;
+
+  if (state[0].set)
+    expect_mods |= (GRUB_TERM_STATUS_LSHIFT | GRUB_TERM_STATUS_RSHIFT);
+  if (state[1].set)
+    expect_mods |= (GRUB_TERM_STATUS_LCTRL | GRUB_TERM_STATUS_RCTRL);
+  if (state[2].set)
+    expect_mods |= (GRUB_TERM_STATUS_LALT | GRUB_TERM_STATUS_RALT);
+
+  grub_dprintf ("keystatus", "expect_mods: %d\n", expect_mods);
+
+  /* Without arguments, just check whether getkeystatus is supported at
+     all.  */
+  if (expect_mods == 0)
+    {
+      grub_term_input_t term;
+      int nterms = 0;
+
+      FOR_ACTIVE_TERM_INPUTS (term)
+	if (!term->getkeystatus)
+	  return grub_error (GRUB_ERR_TEST_FAILURE, "false");
+	else
+	  nterms++;
+      if (!nterms)
+	return grub_error (GRUB_ERR_TEST_FAILURE, "false");
+      return 0;
+    }
+
+  mods = grub_getkeystatus ();
+  grub_dprintf ("keystatus", "mods: %d\n", mods);
+  if (mods >= 0 && (mods & expect_mods) != 0)
+    return 0;
+  else
+    return grub_error (GRUB_ERR_TEST_FAILURE, "false");
+}
+
+static grub_extcmd_t cmd;
+
+GRUB_MOD_INIT(keystatus)
+{
+  cmd = grub_register_extcmd ("keystatus", grub_cmd_keystatus, 0,
+			      N_("[--shift] [--ctrl] [--alt]"),
+			      N_("Check key modifier status."),
+			      options);
+}
+
+GRUB_MOD_FINI(keystatus)
+{
+  grub_unregister_extcmd (cmd);
+}
-- 
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