static int
vars_set_variable(efi_guid_t guid, const char *name, uint8_t *data,
size_t data_size, uint32_t attributes)
{
int errno_value;
int ret = -1;
int i = 0;
if (strlen(name) > 1024) {
errno = EINVAL;
return -1;
}
if (data_size > 1024) {
errno = ENOSPC;
return -1;
}
char *path;
int rc = asprintf(&path, VARS_PATH "%s-" GUID_FORMAT "/data",
name, guid.a, guid.b, guid.c, bswap_16(guid.d),
guid.e[0], guid.e[1], guid.e[2], guid.e[3],
guid.e[4], guid.e[5]);
if (rc < 0)
return -1;
int fd = -1;
if (!access(path, F_OK)) {
rc = efi_del_variable(guid, name);
if (rc < 0)
goto err;
}
efi_variable_t var = {
.VendorGuid = guid,
.DataSize = data_size,
.Status = 0,
.Attributes = attributes
};
for (i = 0; name[i] != '\0'; i++)
var.VariableName[i] = name[i];
memcpy(var.Data, data, data_size);
fd = open(VARS_PATH "new_var", O_WRONLY);
if (fd < 0)
goto err;
rc = write(fd, &var, sizeof(var));
if (rc >= 0)
ret = 0;
err:
errno_value = errno;
if (path)
free(path);
if (fd >= 0)
close(fd);
errno = errno_value;
return ret;
}
static int
vars_get_next_variable_name(efi_guid_t **guid, char **name)
{
return generic_get_next_variable_name(VARS_PATH, guid, name);
}
struct efi_var_operations vars_ops = {
.probe = vars_probe,
.set_variable = vars_set_variable,
.del_variable = vars_del_variable,
.get_variable = vars_get_variable,
.get_variable_attributes = vars_get_variable_attributes,
.get_variable_size = vars_get_variable_size,
.get_next_variable_name = vars_get_next_variable_name,
};
static int
efivarfs_get_next_variable_name(efi_guid_t **guid, char **name)
{
return generic_get_next_variable_name(get_efivarfs_path(), guid, name);
}