[PATCH] Add support for entering the firmware setup screen.

[PATCH] Add support for entering the firmware setup screen.

[Peter Jones]

This adds a command "fwsetup", with which you can enter your firmware
setup screen.  The mechanism is to set a global UEFI variable with a
specific value and reboot.
---
 ChangeLog                           |    8 ++++
 grub-core/Makefile.core.def         |    6 +++
 grub-core/commands/efi/efifwsetup.c |   88 +++++++++++++++++++++++++++++++++++
 grub-core/kern/efi/efi.c            |   30 ++++++++++++
 include/grub/efi/api.h              |    2 +
 include/grub/efi/efi.h              |    5 ++
 6 files changed, 139 insertions(+)
 create mode 100644 grub-core/commands/efi/efifwsetup.c

diff --git a/ChangeLog b/ChangeLog
index ce52576..29ebcbd 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2012-05-24  Peter Jones <pjones@redhat.com>
+
+	* grub-core/Makefile.core.def: add efifwsetup module
+	* grub-core/commands/efi/efifwsetup.c: add code for fwsetup command
+	* grub-core/kern/efi/efi.c (grub_efi_set_variable): New function
+	* include/grub/efi/api.h: add define for OsIndications variable
+	* include/grub/efi/efi.h: export grub_efi_set_variable
+
 2012-04-18  Vladimir Serbinenko  <phcoder@gmail.com>
 
 	* configure.ac: Bump to beta5.
diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def
index 000cf0d..d0c06d5 100644
--- a/grub-core/Makefile.core.def
+++ b/grub-core/Makefile.core.def
@@ -576,6 +576,12 @@ module = {
 };
 
 module = {
+  name = efifwsetup;
+  efi = commands/efi/efifwsetup.c;
+  enable = efi;
+};
+
+module = {
   name = blocklist;
   common = commands/blocklist.c;
 };
diff --git a/grub-core/commands/efi/efifwsetup.c b/grub-core/commands/efi/efifwsetup.c
new file mode 100644
index 0000000..b1cf414
--- /dev/null
+++ b/grub-core/commands/efi/efifwsetup.c
@@ -0,0 +1,88 @@
+/* fwsetup.c - Reboot into firmware setup menu. */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2012  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/mm.h>
+#include <grub/misc.h>
+#include <grub/efi/api.h>
+#include <grub/efi/efi.h>
+#include <grub/command.h>
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+static grub_err_t
+grub_cmd_fwsetup (grub_command_t cmd __attribute__ ((unused)),
+		  int argc __attribute__ ((unused)),
+		  char **args __attribute__ ((unused)))
+{
+  grub_efi_uint64_t *old_os_indications;
+  grub_efi_uint64_t os_indications = GRUB_EFI_OS_INDICATIONS_BOOT_TO_FW_UI;
+  grub_err_t status;
+  grub_size_t oi_size;
+  grub_efi_guid_t global = GRUB_EFI_GLOBAL_VARIABLE_GUID;
+
+  old_os_indications = grub_efi_get_variable("OsIndications", &global,
+					     &oi_size);
+
+  if (old_os_indications != NULL && oi_size == 8)
+    os_indications |= *old_os_indications;
+
+  status = grub_efi_set_variable("OsIndications", &global, &os_indications,
+				 sizeof (os_indications));
+  if (status != GRUB_ERR_NONE)
+    return status;
+
+  grub_reboot();
+
+  return GRUB_ERR_BUG;
+}
+
+static grub_command_t cmd = NULL;
+
+static grub_efi_boolean_t
+efifwsetup_is_supported(void)
+{
+  grub_efi_uint64_t *os_indications_supported = NULL;
+  grub_size_t oi_size = 0;
+  grub_efi_guid_t global = GRUB_EFI_GLOBAL_VARIABLE_GUID;
+
+  os_indications_supported = grub_efi_get_variable("OsIndicationsSupported",
+						  &global, &oi_size);
+
+  if (!os_indications_supported)
+    return 0;
+
+  if (*os_indications_supported & GRUB_EFI_OS_INDICATIONS_BOOT_TO_FW_UI)
+    return 1;
+
+  return 0;
+}
+
+GRUB_MOD_INIT(efifwsetup)
+{
+  if (efifwsetup_is_supported())
+    cmd = grub_register_command("fwsetup", grub_cmd_fwsetup, "",
+				"Reboot into firmware setup menu.");
+
+}
+
+GRUB_MOD_FINI(efifwsetup)
+{
+  if (cmd)
+    grub_unregister_command (cmd);
+}
diff --git a/grub-core/kern/efi/efi.c b/grub-core/kern/efi/efi.c
index 6f12c76..7a418a6 100644
--- a/grub-core/kern/efi/efi.c
+++ b/grub-core/kern/efi/efi.c
@@ -230,6 +230,36 @@ grub_efi_get_variable (const char *var, const grub_efi_guid_t *guid,
   return NULL;
 }
 
+grub_err_t
+grub_efi_set_variable(const char *var, const grub_efi_guid_t *guid,
+		      void *data, grub_size_t datasize)
+{
+  grub_efi_status_t status;
+  grub_efi_runtime_services_t *r;
+  grub_efi_char16_t *var16;
+  grub_size_t len, len16;
+
+  len = grub_strlen (var);
+  len16 = len * GRUB_MAX_UTF16_PER_UTF8;
+  var16 = grub_malloc ((len16 + 1) * sizeof (var16[0]));
+  if (!var16)
+    return grub_errno;
+  len16 = grub_utf8_to_utf16 (var16, len16, (grub_uint8_t *) var, len, NULL);
+  var16[len16] = 0;
+
+  r = grub_efi_system_table->runtime_services;
+
+  grub_efi_uint32_t attributes = GRUB_EFI_VARIABLE_NON_VOLATILE |
+				 GRUB_EFI_VARIABLE_BOOTSERVICE_ACCESS |
+				 GRUB_EFI_VARIABLE_RUNTIME_ACCESS;
+
+  status = efi_call_5 (r->set_variable, var16, guid, attributes, datasize,data);
+  if (status == GRUB_EFI_SUCCESS)
+    return GRUB_ERR_NONE;
+
+  return grub_error (GRUB_ERR_IO, "could not set EFI variable `%s'", var);
+}
+
 grub_uint64_t
 grub_rtc_get_time_ms (void)
 {
diff --git a/include/grub/efi/api.h b/include/grub/efi/api.h
index 26127de..a47a4e3 100644
--- a/include/grub/efi/api.h
+++ b/include/grub/efi/api.h
@@ -58,6 +58,8 @@
 #define GRUB_EFI_OPEN_PROTOCOL_BY_DRIVER		0x00000010
 #define GRUB_EFI_OPEN_PROTOCOL_BY_EXCLUSIVE		0x00000020
 
+#define GRUB_EFI_OS_INDICATIONS_BOOT_TO_FW_UI	0x0000000000000001ULL
+
 #define GRUB_EFI_VARIABLE_NON_VOLATILE		0x0000000000000001
 #define GRUB_EFI_VARIABLE_BOOTSERVICE_ACCESS	0x0000000000000002
 #define GRUB_EFI_VARIABLE_RUNTIME_ACCESS	0x0000000000000004
diff --git a/include/grub/efi/efi.h b/include/grub/efi/efi.h
index e67d92b..489cf9e 100644
--- a/include/grub/efi/efi.h
+++ b/include/grub/efi/efi.h
@@ -64,6 +64,11 @@ grub_err_t EXPORT_FUNC (grub_efi_set_virtual_address_map) (grub_efi_uintn_t memo
 void *EXPORT_FUNC (grub_efi_get_variable) (const char *variable,
 					   const grub_efi_guid_t *guid,
 					   grub_size_t *datasize_out);
+grub_err_t
+EXPORT_FUNC (grub_efi_set_variable) (const char *var,
+				     const grub_efi_guid_t *guid,
+				     void *data,
+				     grub_size_t datasize);
 int
 EXPORT_FUNC (grub_efi_compare_device_paths) (const grub_efi_device_path_t *dp1,
 					     const grub_efi_device_path_t *dp2);
-- 
1.7.10.1

Re: [PATCH] Add support for entering the firmware setup screen.

[Vladimir 'φ-coder/phcoder' Serbinenko]

[-- Attachment #1: Type: text/plain, Size: 303 bytes --]

On 24.05.2012 16:31, Peter Jones wrote:

> +  if (old_os_indications != NULL && oi_size == 8)
> +    os_indications |= *old_os_indications;
> +

Could you make this 8 a sizeof ? Other than that the patch is good and
is approved post-2.0

-- 
Regards
Vladimir 'φ-coder/phcoder' Serbinenko


[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 294 bytes --]

[PATCH] Add support for entering the firmware setup screen.

[Peter Jones]

This adds a command "fwsetup", with which you can enter your firmware
setup screen.  The mechanism is to set a global UEFI variable with a
specific value and reboot.
---
 ChangeLog                           |    8 ++++
 grub-core/Makefile.core.def         |    6 +++
 grub-core/commands/efi/efifwsetup.c |   88 +++++++++++++++++++++++++++++++++++
 grub-core/kern/efi/efi.c            |   30 ++++++++++++
 include/grub/efi/api.h              |    2 +
 include/grub/efi/efi.h              |    5 ++
 6 files changed, 139 insertions(+)
 create mode 100644 grub-core/commands/efi/efifwsetup.c

diff --git a/ChangeLog b/ChangeLog
index ce52576..29ebcbd 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2012-05-24  Peter Jones <pjones@redhat.com>
+
+	* grub-core/Makefile.core.def: add efifwsetup module
+	* grub-core/commands/efi/efifwsetup.c: add code for fwsetup command
+	* grub-core/kern/efi/efi.c (grub_efi_set_variable): New function
+	* include/grub/efi/api.h: add define for OsIndications variable
+	* include/grub/efi/efi.h: export grub_efi_set_variable
+
 2012-04-18  Vladimir Serbinenko  <phcoder@gmail.com>
 
 	* configure.ac: Bump to beta5.
diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def
index 000cf0d..d0c06d5 100644
--- a/grub-core/Makefile.core.def
+++ b/grub-core/Makefile.core.def
@@ -576,6 +576,12 @@ module = {
 };
 
 module = {
+  name = efifwsetup;
+  efi = commands/efi/efifwsetup.c;
+  enable = efi;
+};
+
+module = {
   name = blocklist;
   common = commands/blocklist.c;
 };
diff --git a/grub-core/commands/efi/efifwsetup.c b/grub-core/commands/efi/efifwsetup.c
new file mode 100644
index 0000000..756a14c
--- /dev/null
+++ b/grub-core/commands/efi/efifwsetup.c
@@ -0,0 +1,88 @@
+/* fwsetup.c - Reboot into firmware setup menu. */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2012  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/mm.h>
+#include <grub/misc.h>
+#include <grub/efi/api.h>
+#include <grub/efi/efi.h>
+#include <grub/command.h>
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+static grub_err_t
+grub_cmd_fwsetup (grub_command_t cmd __attribute__ ((unused)),
+		  int argc __attribute__ ((unused)),
+		  char **args __attribute__ ((unused)))
+{
+  grub_efi_uint64_t *old_os_indications;
+  grub_efi_uint64_t os_indications = GRUB_EFI_OS_INDICATIONS_BOOT_TO_FW_UI;
+  grub_err_t status;
+  grub_size_t oi_size;
+  grub_efi_guid_t global = GRUB_EFI_GLOBAL_VARIABLE_GUID;
+
+  old_os_indications = grub_efi_get_variable("OsIndications", &global,
+					     &oi_size);
+
+  if (old_os_indications != NULL && oi_size == sizeof(*old_os_indications))
+    os_indications |= *old_os_indications;
+
+  status = grub_efi_set_variable("OsIndications", &global, &os_indications,
+				 sizeof (os_indications));
+  if (status != GRUB_ERR_NONE)
+    return status;
+
+  grub_reboot();
+
+  return GRUB_ERR_BUG;
+}
+
+static grub_command_t cmd = NULL;
+
+static grub_efi_boolean_t
+efifwsetup_is_supported(void)
+{
+  grub_efi_uint64_t *os_indications_supported = NULL;
+  grub_size_t oi_size = 0;
+  grub_efi_guid_t global = GRUB_EFI_GLOBAL_VARIABLE_GUID;
+
+  os_indications_supported = grub_efi_get_variable("OsIndicationsSupported",
+						  &global, &oi_size);
+
+  if (!os_indications_supported)
+    return 0;
+
+  if (*os_indications_supported & GRUB_EFI_OS_INDICATIONS_BOOT_TO_FW_UI)
+    return 1;
+
+  return 0;
+}
+
+GRUB_MOD_INIT(efifwsetup)
+{
+  if (efifwsetup_is_supported())
+    cmd = grub_register_command("fwsetup", grub_cmd_fwsetup, "",
+				"Reboot into firmware setup menu.");
+
+}
+
+GRUB_MOD_FINI(efifwsetup)
+{
+  if (cmd)
+    grub_unregister_command (cmd);
+}
diff --git a/grub-core/kern/efi/efi.c b/grub-core/kern/efi/efi.c
index 6f12c76..7a418a6 100644
--- a/grub-core/kern/efi/efi.c
+++ b/grub-core/kern/efi/efi.c
@@ -230,6 +230,36 @@ grub_efi_get_variable (const char *var, const grub_efi_guid_t *guid,
   return NULL;
 }
 
+grub_err_t
+grub_efi_set_variable(const char *var, const grub_efi_guid_t *guid,
+		      void *data, grub_size_t datasize)
+{
+  grub_efi_status_t status;
+  grub_efi_runtime_services_t *r;
+  grub_efi_char16_t *var16;
+  grub_size_t len, len16;
+
+  len = grub_strlen (var);
+  len16 = len * GRUB_MAX_UTF16_PER_UTF8;
+  var16 = grub_malloc ((len16 + 1) * sizeof (var16[0]));
+  if (!var16)
+    return grub_errno;
+  len16 = grub_utf8_to_utf16 (var16, len16, (grub_uint8_t *) var, len, NULL);
+  var16[len16] = 0;
+
+  r = grub_efi_system_table->runtime_services;
+
+  grub_efi_uint32_t attributes = GRUB_EFI_VARIABLE_NON_VOLATILE |
+				 GRUB_EFI_VARIABLE_BOOTSERVICE_ACCESS |
+				 GRUB_EFI_VARIABLE_RUNTIME_ACCESS;
+
+  status = efi_call_5 (r->set_variable, var16, guid, attributes, datasize,data);
+  if (status == GRUB_EFI_SUCCESS)
+    return GRUB_ERR_NONE;
+
+  return grub_error (GRUB_ERR_IO, "could not set EFI variable `%s'", var);
+}
+
 grub_uint64_t
 grub_rtc_get_time_ms (void)
 {
diff --git a/include/grub/efi/api.h b/include/grub/efi/api.h
index 26127de..a47a4e3 100644
--- a/include/grub/efi/api.h
+++ b/include/grub/efi/api.h
@@ -58,6 +58,8 @@
 #define GRUB_EFI_OPEN_PROTOCOL_BY_DRIVER		0x00000010
 #define GRUB_EFI_OPEN_PROTOCOL_BY_EXCLUSIVE		0x00000020
 
+#define GRUB_EFI_OS_INDICATIONS_BOOT_TO_FW_UI	0x0000000000000001ULL
+
 #define GRUB_EFI_VARIABLE_NON_VOLATILE		0x0000000000000001
 #define GRUB_EFI_VARIABLE_BOOTSERVICE_ACCESS	0x0000000000000002
 #define GRUB_EFI_VARIABLE_RUNTIME_ACCESS	0x0000000000000004
diff --git a/include/grub/efi/efi.h b/include/grub/efi/efi.h
index e67d92b..489cf9e 100644
--- a/include/grub/efi/efi.h
+++ b/include/grub/efi/efi.h
@@ -64,6 +64,11 @@ grub_err_t EXPORT_FUNC (grub_efi_set_virtual_address_map) (grub_efi_uintn_t memo
 void *EXPORT_FUNC (grub_efi_get_variable) (const char *variable,
 					   const grub_efi_guid_t *guid,
 					   grub_size_t *datasize_out);
+grub_err_t
+EXPORT_FUNC (grub_efi_set_variable) (const char *var,
+				     const grub_efi_guid_t *guid,
+				     void *data,
+				     grub_size_t datasize);
 int
 EXPORT_FUNC (grub_efi_compare_device_paths) (const grub_efi_device_path_t *dp1,
 					     const grub_efi_device_path_t *dp2);
-- 
1.7.10.1

Re: [PATCH] Add support for entering the firmware setup screen.

[Vladimir 'φ-coder/phcoder' Serbinenko]

[-- Attachment #1: Type: text/plain, Size: 6988 bytes --]

Patch committed. Please next time use indent when creating new files and
follow ChangeLog style.
On 24.05.2012 16:31, Peter Jones wrote:

> 
> diff --git a/ChangeLog b/ChangeLog
> index ce52576..29ebcbd 100644
> --- a/ChangeLog
> +++ b/ChangeLog
> @@ -1,3 +1,11 @@
> +2012-05-24  Peter Jones <pjones@redhat.com>
> +
> +	* grub-core/Makefile.core.def: add efifwsetup module
> +	* grub-core/commands/efi/efifwsetup.c: add code for fwsetup command
> +	* grub-core/kern/efi/efi.c (grub_efi_set_variable): New function
> +	* include/grub/efi/api.h: add define for OsIndications variable
> +	* include/grub/efi/efi.h: export grub_efi_set_variable
> +
>  2012-04-18  Vladimir Serbinenko  <phcoder@gmail.com>
>  
>  	* configure.ac: Bump to beta5.
> diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def
> index 000cf0d..d0c06d5 100644
> --- a/grub-core/Makefile.core.def
> +++ b/grub-core/Makefile.core.def
> @@ -576,6 +576,12 @@ module = {
>  };
>  
>  module = {
> +  name = efifwsetup;
> +  efi = commands/efi/efifwsetup.c;
> +  enable = efi;
> +};
> +
> +module = {
>    name = blocklist;
>    common = commands/blocklist.c;
>  };
> diff --git a/grub-core/commands/efi/efifwsetup.c b/grub-core/commands/efi/efifwsetup.c
> new file mode 100644
> index 0000000..b1cf414
> --- /dev/null
> +++ b/grub-core/commands/efi/efifwsetup.c
> @@ -0,0 +1,88 @@
> +/* fwsetup.c - Reboot into firmware setup menu. */
> +/*
> + *  GRUB  --  GRand Unified Bootloader
> + *  Copyright (C) 2012  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/mm.h>
> +#include <grub/misc.h>
> +#include <grub/efi/api.h>
> +#include <grub/efi/efi.h>
> +#include <grub/command.h>
> +
> +GRUB_MOD_LICENSE ("GPLv3+");
> +
> +static grub_err_t
> +grub_cmd_fwsetup (grub_command_t cmd __attribute__ ((unused)),
> +		  int argc __attribute__ ((unused)),
> +		  char **args __attribute__ ((unused)))
> +{
> +  grub_efi_uint64_t *old_os_indications;
> +  grub_efi_uint64_t os_indications = GRUB_EFI_OS_INDICATIONS_BOOT_TO_FW_UI;
> +  grub_err_t status;
> +  grub_size_t oi_size;
> +  grub_efi_guid_t global = GRUB_EFI_GLOBAL_VARIABLE_GUID;
> +
> +  old_os_indications = grub_efi_get_variable("OsIndications", &global,
> +					     &oi_size);
> +
> +  if (old_os_indications != NULL && oi_size == 8)
> +    os_indications |= *old_os_indications;
> +
> +  status = grub_efi_set_variable("OsIndications", &global, &os_indications,
> +				 sizeof (os_indications));
> +  if (status != GRUB_ERR_NONE)
> +    return status;
> +
> +  grub_reboot();
> +
> +  return GRUB_ERR_BUG;
> +}
> +
> +static grub_command_t cmd = NULL;
> +
> +static grub_efi_boolean_t
> +efifwsetup_is_supported(void)
> +{
> +  grub_efi_uint64_t *os_indications_supported = NULL;
> +  grub_size_t oi_size = 0;
> +  grub_efi_guid_t global = GRUB_EFI_GLOBAL_VARIABLE_GUID;
> +
> +  os_indications_supported = grub_efi_get_variable("OsIndicationsSupported",
> +						  &global, &oi_size);
> +
> +  if (!os_indications_supported)
> +    return 0;
> +
> +  if (*os_indications_supported & GRUB_EFI_OS_INDICATIONS_BOOT_TO_FW_UI)
> +    return 1;
> +
> +  return 0;
> +}
> +
> +GRUB_MOD_INIT(efifwsetup)
> +{
> +  if (efifwsetup_is_supported())
> +    cmd = grub_register_command("fwsetup", grub_cmd_fwsetup, "",
> +				"Reboot into firmware setup menu.");
> +
> +}
> +
> +GRUB_MOD_FINI(efifwsetup)
> +{
> +  if (cmd)
> +    grub_unregister_command (cmd);
> +}
> diff --git a/grub-core/kern/efi/efi.c b/grub-core/kern/efi/efi.c
> index 6f12c76..7a418a6 100644
> --- a/grub-core/kern/efi/efi.c
> +++ b/grub-core/kern/efi/efi.c
> @@ -230,6 +230,36 @@ grub_efi_get_variable (const char *var, const grub_efi_guid_t *guid,
>    return NULL;
>  }
>  
> +grub_err_t
> +grub_efi_set_variable(const char *var, const grub_efi_guid_t *guid,
> +		      void *data, grub_size_t datasize)
> +{
> +  grub_efi_status_t status;
> +  grub_efi_runtime_services_t *r;
> +  grub_efi_char16_t *var16;
> +  grub_size_t len, len16;
> +
> +  len = grub_strlen (var);
> +  len16 = len * GRUB_MAX_UTF16_PER_UTF8;
> +  var16 = grub_malloc ((len16 + 1) * sizeof (var16[0]));
> +  if (!var16)
> +    return grub_errno;
> +  len16 = grub_utf8_to_utf16 (var16, len16, (grub_uint8_t *) var, len, NULL);
> +  var16[len16] = 0;
> +
> +  r = grub_efi_system_table->runtime_services;
> +
> +  grub_efi_uint32_t attributes = GRUB_EFI_VARIABLE_NON_VOLATILE |
> +				 GRUB_EFI_VARIABLE_BOOTSERVICE_ACCESS |
> +				 GRUB_EFI_VARIABLE_RUNTIME_ACCESS;
> +
> +  status = efi_call_5 (r->set_variable, var16, guid, attributes, datasize,data);
> +  if (status == GRUB_EFI_SUCCESS)
> +    return GRUB_ERR_NONE;
> +
> +  return grub_error (GRUB_ERR_IO, "could not set EFI variable `%s'", var);
> +}
> +
>  grub_uint64_t
>  grub_rtc_get_time_ms (void)
>  {
> diff --git a/include/grub/efi/api.h b/include/grub/efi/api.h
> index 26127de..a47a4e3 100644
> --- a/include/grub/efi/api.h
> +++ b/include/grub/efi/api.h
> @@ -58,6 +58,8 @@
>  #define GRUB_EFI_OPEN_PROTOCOL_BY_DRIVER		0x00000010
>  #define GRUB_EFI_OPEN_PROTOCOL_BY_EXCLUSIVE		0x00000020
>  
> +#define GRUB_EFI_OS_INDICATIONS_BOOT_TO_FW_UI	0x0000000000000001ULL
> +
>  #define GRUB_EFI_VARIABLE_NON_VOLATILE		0x0000000000000001
>  #define GRUB_EFI_VARIABLE_BOOTSERVICE_ACCESS	0x0000000000000002
>  #define GRUB_EFI_VARIABLE_RUNTIME_ACCESS	0x0000000000000004
> diff --git a/include/grub/efi/efi.h b/include/grub/efi/efi.h
> index e67d92b..489cf9e 100644
> --- a/include/grub/efi/efi.h
> +++ b/include/grub/efi/efi.h
> @@ -64,6 +64,11 @@ grub_err_t EXPORT_FUNC (grub_efi_set_virtual_address_map) (grub_efi_uintn_t memo
>  void *EXPORT_FUNC (grub_efi_get_variable) (const char *variable,
>  					   const grub_efi_guid_t *guid,
>  					   grub_size_t *datasize_out);
> +grub_err_t
> +EXPORT_FUNC (grub_efi_set_variable) (const char *var,
> +				     const grub_efi_guid_t *guid,
> +				     void *data,
> +				     grub_size_t datasize);
>  int
>  EXPORT_FUNC (grub_efi_compare_device_paths) (const grub_efi_device_path_t *dp1,
>  					     const grub_efi_device_path_t *dp2);



-- 
Regards
Vladimir 'φ-coder/phcoder' Serbinenko


[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 294 bytes --]