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efi: Add grub_efi_set_variable_to_string()

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Add a function that sets an EFI variable to a string value.
The string is converted from UTF-8 to UTF-16.

Signed-off-by: Oliver Steffen <osteffen@redhat.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This commit is contained in:
Oliver Steffen 2023-05-26 13:35:48 +02:00 committed by Daniel Kiper
parent a0b16564ee
commit e83a88f6ea
2 changed files with 25 additions and 0 deletions
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22
grub-core/kern/efi/efi.c
View File

@ -286,6 +286,28 @@ grub_efi_get_variable_with_attributes (const char *var,
return status;
}
grub_err_t
grub_efi_set_variable_to_string (const char *name, const grub_guid_t *guid,
const char *value, grub_efi_uint32_t attributes)
{
grub_efi_char16_t *value_16;
grub_ssize_t len16;
grub_err_t status;
len16 = grub_utf8_to_utf16_alloc (value, &value_16, NULL);
if (len16 < 0)
return grub_errno;
status = grub_efi_set_variable_with_attributes (name, guid,
(void *) value_16, (len16 + 1) * sizeof (value_16[0]),
attributes);
grub_free (value_16);
return status;
}
grub_efi_status_t
grub_efi_get_variable (const char *var, const grub_guid_t *guid,
grub_size_t *datasize_out, void **data_out)

3
include/grub/efi/efi.h
View File

@ -108,6 +108,9 @@ EXPORT_FUNC (grub_efi_set_variable) (const char *var,
const grub_guid_t *guid,
void *data,
grub_size_t datasize);
grub_err_t
EXPORT_FUNC (grub_efi_set_variable_to_string) (const char *name, const grub_guid_t *guid,
const char *value, grub_efi_uint32_t attributes);
int
EXPORT_FUNC (grub_efi_compare_device_paths) (const grub_efi_device_path_t *dp1,
const grub_efi_device_path_t *dp2);