[J-u-boot.git] / cmd / nvedit_efi.c

// SPDX-License-Identifier: GPL-2.0+
/*
 *  Integrate UEFI variables to u-boot env interface
 *
 *  Copyright (c) 2018 AKASHI Takahiro, Linaro Limited
 */

#include <charset.h>
#include <common.h>
#include <command.h>
#include <efi_loader.h>
#include <env.h>
#include <exports.h>
#include <hexdump.h>
#include <malloc.h>
#include <linux/kernel.h>

/*
 * From efi_variable.c,
 *
 * Mapping between UEFI variables and u-boot variables:
 *
 *   efi_$guid_$varname = {attributes}(type)value
 */

static const struct {
	u32 mask;
	char *text;
} efi_var_attrs[] = {
	{EFI_VARIABLE_NON_VOLATILE, "NV"},
	{EFI_VARIABLE_BOOTSERVICE_ACCESS, "BS"},
	{EFI_VARIABLE_RUNTIME_ACCESS, "RT"},
	{EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS, "AW"},
	{EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS, "AT"},
};

/**
 * efi_dump_single_var() - show information about a UEFI variable
 *
 * @name:	Name of the variable
 * @guid:	Vendor GUID
 *
 * Show information encoded in one UEFI variable
 */
static void efi_dump_single_var(u16 *name, efi_guid_t *guid)
{
	u32 attributes;
	u8 *data;
	efi_uintn_t size;
	int count, i;
	efi_status_t ret;

	data = NULL;
	size = 0;
	ret = EFI_CALL(efi_get_variable(name, guid, &attributes, &size, data));
	if (ret == EFI_BUFFER_TOO_SMALL) {
		data = malloc(size);
		if (!data)
			goto out;

		ret = EFI_CALL(efi_get_variable(name, guid, &attributes, &size,
						data));
	}
	if (ret == EFI_NOT_FOUND) {
		printf("Error: \"%ls\" not defined\n", name);
		goto out;
	}
	if (ret != EFI_SUCCESS)
		goto out;

	printf("%ls:", name);
	for (count = 0, i = 0; i < ARRAY_SIZE(efi_var_attrs); i++)
		if (attributes & efi_var_attrs[i].mask) {
			if (count)
				putc('|');
			else
				putc(' ');
			count++;
			puts(efi_var_attrs[i].text);
		}
	printf(", DataSize = 0x%zx\n", size);
	print_hex_dump("    ", DUMP_PREFIX_OFFSET, 16, 1, data, size, true);

out:
	free(data);
}

/**
 * efi_dump_vars() - show information about named UEFI variables
 *
 * @argc:	Number of arguments (variables)
 * @argv:	Argument (variable name) array
 * Return:	CMD_RET_SUCCESS on success, or CMD_RET_RET_FAILURE
 *
 * Show information encoded in named UEFI variables
 */
static int efi_dump_vars(int argc,  char * const argv[])
{
	u16 *var_name16, *p;
	efi_uintn_t buf_size, size;

	buf_size = 128;
	var_name16 = malloc(buf_size);
	if (!var_name16)
		return CMD_RET_FAILURE;

	for (; argc > 0; argc--, argv++) {
		size = (utf8_utf16_strlen(argv[0]) + 1) * sizeof(u16);
		if (buf_size < size) {
			buf_size = size;
			p = realloc(var_name16, buf_size);
			if (!p) {
				free(var_name16);
				return CMD_RET_FAILURE;
			}
			var_name16 = p;
		}

		p = var_name16;
		utf8_utf16_strcpy(&p, argv[0]);

		efi_dump_single_var(var_name16,
				    (efi_guid_t *)&efi_global_variable_guid);
	}

	free(var_name16);

	return CMD_RET_SUCCESS;
}

/**
 * efi_dump_vars() - show information about all the UEFI variables
 *
 * Return:	CMD_RET_SUCCESS on success, or CMD_RET_RET_FAILURE
 *
 * Show information encoded in all the UEFI variables
 */
static int efi_dump_var_all(void)
{
	u16 *var_name16, *p;
	efi_uintn_t buf_size, size;
	efi_guid_t guid;
	efi_status_t ret;

	buf_size = 128;
	var_name16 = malloc(buf_size);
	if (!var_name16)
		return CMD_RET_FAILURE;

	var_name16[0] = 0;
	for (;;) {
		size = buf_size;
		ret = EFI_CALL(efi_get_next_variable_name(&size, var_name16,
							  &guid));
		if (ret == EFI_NOT_FOUND)
			break;
		if (ret == EFI_BUFFER_TOO_SMALL) {
			buf_size = size;
			p = realloc(var_name16, buf_size);
			if (!p) {
				free(var_name16);
				return CMD_RET_FAILURE;
			}
			var_name16 = p;
			ret = EFI_CALL(efi_get_next_variable_name(&size,
								  var_name16,
								  &guid));
		}
		if (ret != EFI_SUCCESS) {
			free(var_name16);
			return CMD_RET_FAILURE;
		}

		efi_dump_single_var(var_name16, &guid);
	}

	free(var_name16);

	return CMD_RET_SUCCESS;
}

/**
 * do_env_print_efi() - show information about UEFI variables
 *
 * @cmdtp:	Command table
 * @flag:	Command flag
 * @argc:	Number of arguments
 * @argv:	Argument array
 * Return:	CMD_RET_SUCCESS on success, or CMD_RET_RET_FAILURE
 *
 * This function is for "env print -e" or "printenv -e" command:
 *   => env print -e [var [...]]
 * If one or more variable names are specified, show information
 * named UEFI variables, otherwise show all the UEFI variables.
 */
int do_env_print_efi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	efi_status_t ret;

	/* Initialize EFI drivers */
	ret = efi_init_obj_list();
	if (ret != EFI_SUCCESS) {
		printf("Error: Cannot initialize UEFI sub-system, r = %lu\n",
		       ret & ~EFI_ERROR_MASK);
		return CMD_RET_FAILURE;
	}

	if (argc > 1)
		/* show specified UEFI variables */
		return efi_dump_vars(--argc, ++argv);

	/* enumerate and show all UEFI variables */
	return efi_dump_var_all();
}

/**
 * append_value() - encode UEFI variable's value
 * @bufp:	Buffer of encoded UEFI variable's value
 * @sizep:	Size of buffer
 * @data:	data to be encoded into the value
 * Return:	0 on success, -1 otherwise
 *
 * Interpret a given data string and append it to buffer.
 * Buffer will be realloc'ed if necessary.
 *
 * Currently supported formats are:
 *   =0x0123...:		Hexadecimal number
 *   =H0123...:			Hexadecimal-byte array
 *   ="...", =S"..." or <string>:
 *				String
 */
static int append_value(char **bufp, size_t *sizep, char *data)
{
	char *tmp_buf = NULL, *new_buf = NULL, *value;
	unsigned long len = 0;

	if (!strncmp(data, "=0x", 2)) { /* hexadecimal number */
		union {
			u8 u8;
			u16 u16;
			u32 u32;
			u64 u64;
		} tmp_data;
		unsigned long hex_value;
		void *hex_ptr;

		data += 3;
		len = strlen(data);
		if ((len & 0x1)) /* not multiple of two */
			return -1;

		len /= 2;
		if (len > 8)
			return -1;
		else if (len > 4)
			len = 8;
		else if (len > 2)
			len = 4;

		/* convert hex hexadecimal number */
		if (strict_strtoul(data, 16, &hex_value) < 0)
			return -1;

		tmp_buf = malloc(len);
		if (!tmp_buf)
			return -1;

		if (len == 1) {
			tmp_data.u8 = hex_value;
			hex_ptr = &tmp_data.u8;
		} else if (len == 2) {
			tmp_data.u16 = hex_value;
			hex_ptr = &tmp_data.u16;
		} else if (len == 4) {
			tmp_data.u32 = hex_value;
			hex_ptr = &tmp_data.u32;
		} else {
			tmp_data.u64 = hex_value;
			hex_ptr = &tmp_data.u64;
		}
		memcpy(tmp_buf, hex_ptr, len);
		value = tmp_buf;

	} else if (!strncmp(data, "=H", 2)) { /* hexadecimal-byte array */
		data += 2;
		len = strlen(data);
		if (len & 0x1) /* not multiple of two */
			return -1;

		len /= 2;
		tmp_buf = malloc(len);
		if (!tmp_buf)
			return -1;

		if (hex2bin((u8 *)tmp_buf, data, len) < 0) {
			printf("Error: illegal hexadecimal string\n");
			free(tmp_buf);
			return -1;
		}

		value = tmp_buf;
	} else { /* string */
		if (!strncmp(data, "=\"", 2) || !strncmp(data, "=S\"", 3)) {
			if (data[1] == '"')
				data += 2;
			else
				data += 3;
			value = data;
			len = strlen(data) - 1;
			if (data[len] != '"')
				return -1;
		} else {
			value = data;
			len = strlen(data);
		}
	}

	new_buf = realloc(*bufp, *sizep + len);
	if (!new_buf)
		goto out;

	memcpy(new_buf + *sizep, value, len);
	*bufp = new_buf;
	*sizep += len;

out:
	free(tmp_buf);

	return 0;
}

/**
 * do_env_print_efi() - set UEFI variable
 *
 * @cmdtp:	Command table
 * @flag:	Command flag
 * @argc:	Number of arguments
 * @argv:	Argument array
 * Return:	CMD_RET_SUCCESS on success, or CMD_RET_RET_FAILURE
 *
 * This function is for "env set -e" or "setenv -e" command:
 *   => env set -e var [value ...]]
 * Encode values specified and set given UEFI variable.
 * If no value is specified, delete the variable.
 */
int do_env_set_efi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	char *var_name, *value = NULL;
	efi_uintn_t size = 0;
	u16 *var_name16 = NULL, *p;
	size_t len;
	efi_guid_t guid;
	u32 attributes;
	efi_status_t ret;

	if (argc == 1)
		return CMD_RET_USAGE;

	/* Initialize EFI drivers */
	ret = efi_init_obj_list();
	if (ret != EFI_SUCCESS) {
		printf("Error: Cannot initialize UEFI sub-system, r = %lu\n",
		       ret & ~EFI_ERROR_MASK);
		return CMD_RET_FAILURE;
	}

	attributes = EFI_VARIABLE_BOOTSERVICE_ACCESS |
		     EFI_VARIABLE_RUNTIME_ACCESS;
	if (!strcmp(argv[1], "-nv")) {
		attributes |= EFI_VARIABLE_NON_VOLATILE;
		argc--;
		argv++;
		if (argc == 1)
			return CMD_RET_SUCCESS;
	}

	var_name = argv[1];
	if (argc == 2) {
		/* delete */
		value = NULL;
		size = 0;
	} else { /* set */
		argc -= 2;
		argv += 2;

		for ( ; argc > 0; argc--, argv++)
			if (append_value(&value, &size, argv[0]) < 0) {
				printf("## Failed to process an argument, %s\n",
				       argv[0]);
				ret = CMD_RET_FAILURE;
				goto out;
			}
	}

	len = utf8_utf16_strnlen(var_name, strlen(var_name));
	var_name16 = malloc((len + 1) * 2);
	if (!var_name16) {
		printf("## Out of memory\n");
		ret = CMD_RET_FAILURE;
		goto out;
	}
	p = var_name16;
	utf8_utf16_strncpy(&p, var_name, len + 1);

	guid = efi_global_variable_guid;
	ret = EFI_CALL(efi_set_variable(var_name16, &guid, attributes,
					size, value));
	if (ret == EFI_SUCCESS) {
		ret = CMD_RET_SUCCESS;
	} else {
		printf("## Failed to set EFI variable\n");
		ret = CMD_RET_FAILURE;
	}
out:
	free(value);
	free(var_name16);

	return ret;
}
Commit	Line	Data
49d81fdf AT	1	// SPDX-License-Identifier: GPL-2.0+
	2	/*
	3	* Integrate UEFI variables to u-boot env interface
	4	*
	5	* Copyright (c) 2018 AKASHI Takahiro, Linaro Limited
	6	*/
	7
	8	#include <charset.h>
	9	#include <common.h>
	10	#include <command.h>
	11	#include <efi_loader.h>
9fb625ce	12	#include <env.h>
49d81fdf AT	13	#include <exports.h>
	14	#include <hexdump.h>
	15	#include <malloc.h>
	16	#include <linux/kernel.h>
	17
	18	/*
	19	* From efi_variable.c,
	20	*
	21	* Mapping between UEFI variables and u-boot variables:
	22	*
	23	* efi_$guid_$varname = {attributes}(type)value
	24	*/
	25
	26	static const struct {
	27	u32 mask;
	28	char *text;
	29	} efi_var_attrs[] = {
	30	{EFI_VARIABLE_NON_VOLATILE, "NV"},
	31	{EFI_VARIABLE_BOOTSERVICE_ACCESS, "BS"},
	32	{EFI_VARIABLE_RUNTIME_ACCESS, "RT"},
	33	{EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS, "AW"},
	34	{EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS, "AT"},
	35	};
	36
	37	/**
	38	* efi_dump_single_var() - show information about a UEFI variable
	39	*
	40	* @name: Name of the variable
	41	* @guid: Vendor GUID
	42	*
	43	* Show information encoded in one UEFI variable
	44	*/
	45	static void efi_dump_single_var(u16 name, efi_guid_t guid)
	46	{
	47	u32 attributes;
	48	u8 *data;
	49	efi_uintn_t size;
	50	int count, i;
	51	efi_status_t ret;
	52
	53	data = NULL;
	54	size = 0;
	55	ret = EFI_CALL(efi_get_variable(name, guid, &attributes, &size, data));
	56	if (ret == EFI_BUFFER_TOO_SMALL) {
	57	data = malloc(size);
	58	if (!data)
	59	goto out;
	60
	61	ret = EFI_CALL(efi_get_variable(name, guid, &attributes, &size,
	62	data));
	63	}
	64	if (ret == EFI_NOT_FOUND) {
	65	printf("Error: \"%ls\" not defined\n", name);
	66	goto out;
	67	}
	68	if (ret != EFI_SUCCESS)
	69	goto out;
	70
	71	printf("%ls:", name);
	72	for (count = 0, i = 0; i < ARRAY_SIZE(efi_var_attrs); i++)
	73	if (attributes & efi_var_attrs[i].mask) {
	74	if (count)
	75	putc('\|');
	76	else
77	putc(' ');
78	count++;
79	puts(efi_var_attrs[i].text);
80	}
81	printf(", DataSize = 0x%zx\n", size);
82	print_hex_dump(" ", DUMP_PREFIX_OFFSET, 16, 1, data, size, true);
83
49d81fdf AT	84	out:
	85	free(data);
	86	}
	87
	88	/**
	89	* efi_dump_vars() - show information about named UEFI variables
	90	*
	91	* @argc: Number of arguments (variables)
	92	* @argv: Argument (variable name) array
	93	* Return: CMD_RET_SUCCESS on success, or CMD_RET_RET_FAILURE
	94	*
	95	* Show information encoded in named UEFI variables
	96	*/
	97	static int efi_dump_vars(int argc, char * const argv[])
	98	{
	99	u16 var_name16, p;
	100	efi_uintn_t buf_size, size;
	101
	102	buf_size = 128;
	103	var_name16 = malloc(buf_size);
	104	if (!var_name16)
	105	return CMD_RET_FAILURE;
	106
	107	for (; argc > 0; argc--, argv++) {
	108	size = (utf8_utf16_strlen(argv[0]) + 1) * sizeof(u16);
	109	if (buf_size < size) {
	110	buf_size = size;
	111	p = realloc(var_name16, buf_size);
	112	if (!p) {
	113	free(var_name16);
	114	return CMD_RET_FAILURE;
	115	}
	116	var_name16 = p;
	117	}
	118
	119	p = var_name16;
	120	utf8_utf16_strcpy(&p, argv[0]);
	121
	122	efi_dump_single_var(var_name16,
	123	(efi_guid_t *)&efi_global_variable_guid);
	124	}
	125
	126	free(var_name16);
	127
	128	return CMD_RET_SUCCESS;
	129	}
	130
	131	/**
	132	* efi_dump_vars() - show information about all the UEFI variables
	133	*
	134	* Return: CMD_RET_SUCCESS on success, or CMD_RET_RET_FAILURE
	135	*
	136	* Show information encoded in all the UEFI variables
	137	*/
	138	static int efi_dump_var_all(void)
	139	{
	140	u16 var_name16, p;
	141	efi_uintn_t buf_size, size;
	142	efi_guid_t guid;
	143	efi_status_t ret;
	144
	145	buf_size = 128;
	146	var_name16 = malloc(buf_size);
	147	if (!var_name16)
148	return CMD_RET_FAILURE;
149
150	var_name16[0] = 0;
151	for (;;) {
152	size = buf_size;
153	ret = EFI_CALL(efi_get_next_variable_name(&size, var_name16,
154	&guid));
155	if (ret == EFI_NOT_FOUND)
156	break;
157	if (ret == EFI_BUFFER_TOO_SMALL) {
158	buf_size = size;
159	p = realloc(var_name16, buf_size);
160	if (!p) {
161	free(var_name16);
162	return CMD_RET_FAILURE;
163	}
164	var_name16 = p;
165	ret = EFI_CALL(efi_get_next_variable_name(&size,
166	var_name16,
167	&guid));
168	}
169	if (ret != EFI_SUCCESS) {
170	free(var_name16);
171	return CMD_RET_FAILURE;
172	}
173
174	efi_dump_single_var(var_name16, &guid);
175	}
176
177	free(var_name16);
178
179	return CMD_RET_SUCCESS;
180	}
181
182	/**
183	* do_env_print_efi() - show information about UEFI variables
184	*
185	* @cmdtp: Command table
186	* @flag: Command flag
187	* @argc: Number of arguments
188	* @argv: Argument array
189	* Return: CMD_RET_SUCCESS on success, or CMD_RET_RET_FAILURE
190	*
191	* This function is for "env print -e" or "printenv -e" command:
192	* => env print -e [var [...]]
193	* If one or more variable names are specified, show information
194	* named UEFI variables, otherwise show all the UEFI variables.
195	*/
196	int do_env_print_efi(cmd_tbl_t cmdtp, int flag, int argc, char const argv[])
197	{
198	efi_status_t ret;
199
200	/* Initialize EFI drivers */
201	ret = efi_init_obj_list();
202	if (ret != EFI_SUCCESS) {
203	printf("Error: Cannot initialize UEFI sub-system, r = %lu\n",
204	ret & ~EFI_ERROR_MASK);
205	return CMD_RET_FAILURE;
206	}
207
208	if (argc > 1)
209	/* show specified UEFI variables */
210	return efi_dump_vars(--argc, ++argv);
211
212	/* enumerate and show all UEFI variables */
213	return efi_dump_var_all();
214	}
215
216	/**
217	* append_value() - encode UEFI variable's value
218	* @bufp: Buffer of encoded UEFI variable's value
219	* @sizep: Size of buffer
220	* @data: data to be encoded into the value
221	* Return: 0 on success, -1 otherwise
222	*
223	* Interpret a given data string and append it to buffer.
224	* Buffer will be realloc'ed if necessary.
225	*
226	* Currently supported formats are:
227	* =0x0123...: Hexadecimal number
228	* =H0123...: Hexadecimal-byte array
229	* ="...", =S"..." or <string>:
230	* String
231	*/
232	static int append_value(char *bufp, size_t sizep, char *data)
233	{
234	char tmp_buf = NULL, new_buf = NULL, *value;
235	unsigned long len = 0;
236
237	if (!strncmp(data, "=0x", 2)) { /* hexadecimal number */
238	union {
239	u8 u8;
240	u16 u16;
241	u32 u32;
242	u64 u64;
243	} tmp_data;
244	unsigned long hex_value;
245	void *hex_ptr;
246
247	data += 3;
248	len = strlen(data);
249	if ((len & 0x1)) /* not multiple of two */
250	return -1;
251
252	len /= 2;
253	if (len > 8)
254	return -1;
255	else if (len > 4)
256	len = 8;
257	else if (len > 2)
258	len = 4;
259
260	/* convert hex hexadecimal number */
261	if (strict_strtoul(data, 16, &hex_value) < 0)
262	return -1;
263
264	tmp_buf = malloc(len);
265	if (!tmp_buf)
266	return -1;
267
268	if (len == 1) {
269	tmp_data.u8 = hex_value;
270	hex_ptr = &tmp_data.u8;
271	} else if (len == 2) {
272	tmp_data.u16 = hex_value;
273	hex_ptr = &tmp_data.u16;
274	} else if (len == 4) {
275	tmp_data.u32 = hex_value;
276	hex_ptr = &tmp_data.u32;
277	} else {
278	tmp_data.u64 = hex_value;
279	hex_ptr = &tmp_data.u64;
280	}
281	memcpy(tmp_buf, hex_ptr, len);
282	value = tmp_buf;
283
284	} else if (!strncmp(data, "=H", 2)) { /* hexadecimal-byte array */
285	data += 2;
286	len = strlen(data);
287	if (len & 0x1) /* not multiple of two */
288	return -1;
289
290	len /= 2;
291	tmp_buf = malloc(len);
292	if (!tmp_buf)
293	return -1;
294
45203e0c HS	295	if (hex2bin((u8 *)tmp_buf, data, len) < 0) {
	296	printf("Error: illegal hexadecimal string\n");
	297	free(tmp_buf);
49d81fdf	298	return -1;
45203e0c	299	}
49d81fdf AT	300
	301	value = tmp_buf;
	302	} else { /* string */
	303	if (!strncmp(data, "=\"", 2) \|\| !strncmp(data, "=S\"", 3)) {
	304	if (data[1] == '"')
	305	data += 2;
	306	else
	307	data += 3;
	308	value = data;
	309	len = strlen(data) - 1;
	310	if (data[len] != '"')
	311	return -1;
	312	} else {
	313	value = data;
	314	len = strlen(data);
	315	}
	316	}
	317
	318	new_buf = realloc(bufp, sizep + len);
	319	if (!new_buf)
	320	goto out;
	321
	322	memcpy(new_buf + *sizep, value, len);
	323	*bufp = new_buf;
	324	*sizep += len;
	325
	326	out:
	327	free(tmp_buf);
	328
	329	return 0;
	330	}
	331
	332	/**
	333	* do_env_print_efi() - set UEFI variable
	334	*
	335	* @cmdtp: Command table
	336	* @flag: Command flag
	337	* @argc: Number of arguments
	338	* @argv: Argument array
	339	* Return: CMD_RET_SUCCESS on success, or CMD_RET_RET_FAILURE
	340	*
	341	* This function is for "env set -e" or "setenv -e" command:
	342	* => env set -e var [value ...]]
	343	* Encode values specified and set given UEFI variable.
	344	* If no value is specified, delete the variable.
	345	*/
	346	int do_env_set_efi(cmd_tbl_t cmdtp, int flag, int argc, char const argv[])
	347	{
	348	char var_name, value = NULL;
	349	efi_uintn_t size = 0;
	350	u16 var_name16 = NULL, p;
	351	size_t len;
	352	efi_guid_t guid;
4b27a761	353	u32 attributes;
49d81fdf AT	354	efi_status_t ret;
	355
	356	if (argc == 1)
	357	return CMD_RET_USAGE;
	358
	359	/* Initialize EFI drivers */
	360	ret = efi_init_obj_list();
	361	if (ret != EFI_SUCCESS) {
	362	printf("Error: Cannot initialize UEFI sub-system, r = %lu\n",
	363	ret & ~EFI_ERROR_MASK);
	364	return CMD_RET_FAILURE;
	365	}
	366
4b27a761 AT	367	attributes = EFI_VARIABLE_BOOTSERVICE_ACCESS \|
	368	EFI_VARIABLE_RUNTIME_ACCESS;
	369	if (!strcmp(argv[1], "-nv")) {
	370	attributes \|= EFI_VARIABLE_NON_VOLATILE;
	371	argc--;
	372	argv++;
	373	if (argc == 1)
	374	return CMD_RET_SUCCESS;
	375	}
	376
49d81fdf AT	377	var_name = argv[1];
	378	if (argc == 2) {
	379	/* delete */
	380	value = NULL;
	381	size = 0;
	382	} else { /* set */
	383	argc -= 2;
	384	argv += 2;
	385
	386	for ( ; argc > 0; argc--, argv++)
	387	if (append_value(&value, &size, argv[0]) < 0) {
8190b4a3 AT	388	printf("## Failed to process an argument, %s\n",
8190b4a3 AT	389	argv[0]);
49d81fdf AT	390	ret = CMD_RET_FAILURE;
	391	goto out;
	392	}
	393	}
	394
	395	len = utf8_utf16_strnlen(var_name, strlen(var_name));
	396	var_name16 = malloc((len + 1) * 2);
	397	if (!var_name16) {
8190b4a3	398	printf("## Out of memory\n");
49d81fdf AT	399	ret = CMD_RET_FAILURE;
	400	goto out;
	401	}
	402	p = var_name16;
	403	utf8_utf16_strncpy(&p, var_name, len + 1);
	404
	405	guid = efi_global_variable_guid;
4b27a761	406	ret = EFI_CALL(efi_set_variable(var_name16, &guid, attributes,
49d81fdf	407	size, value));
8190b4a3 AT	408	if (ret == EFI_SUCCESS) {
	409	ret = CMD_RET_SUCCESS;
	410	} else {
	411	printf("## Failed to set EFI variable\n");
	412	ret = CMD_RET_FAILURE;
	413	}
49d81fdf AT	414	out:
	415	free(value);
	416	free(var_name16);
	417
	418	return ret;
	419	}