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/*-
* Copyright (c) 2018 Netflix, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <stand.h>
#include <efi.h>
#include <efichar.h>
#include <efilib.h>
static EFI_GUID FreeBSDBootVarGUID = FREEBSD_BOOT_VAR_GUID;
static EFI_GUID GlobalBootVarGUID = EFI_GLOBAL_VARIABLE;
EFI_STATUS
efi_getenv(EFI_GUID *g, const char *v, void *data, size_t *len)
{
size_t ul;
CHAR16 *uv;
UINT32 attr;
UINTN dl;
EFI_STATUS rv;
uv = NULL;
if (utf8_to_ucs2(v, &uv, &ul) != 0)
return (EFI_OUT_OF_RESOURCES);
dl = *len;
rv = RS->GetVariable(uv, g, &attr, &dl, data);
if (rv == EFI_SUCCESS || rv == EFI_BUFFER_TOO_SMALL)
*len = dl;
free(uv);
return (rv);
}
EFI_STATUS
efi_global_getenv(const char *v, void *data, size_t *len)
{
return (efi_getenv(&GlobalBootVarGUID, v, data, len));
}
EFI_STATUS
efi_freebsd_getenv(const char *v, void *data, size_t *len)
{
return (efi_getenv(&FreeBSDBootVarGUID, v, data, len));
}
/*
* efi_setenv -- Sets an env variable.
*/
EFI_STATUS
efi_setenv(EFI_GUID *guid, const char *varname, UINT32 attr, void *data, __size_t len)
{
EFI_STATUS rv;
CHAR16 *uv;
size_t ul;
uv = NULL;
if (utf8_to_ucs2(varname, &uv, &ul) != 0)
return (EFI_OUT_OF_RESOURCES);
rv = RS->SetVariable(uv, guid, attr, len, data);
free(uv);
return (rv);
}
EFI_STATUS
efi_setenv_freebsd_wcs(const char *varname, CHAR16 *valstr)
{
CHAR16 *var = NULL;
size_t len;
EFI_STATUS rv;
if (utf8_to_ucs2(varname, &var, &len) != 0)
return (EFI_OUT_OF_RESOURCES);
rv = RS->SetVariable(var, &FreeBSDBootVarGUID,
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
(ucs2len(valstr) + 1) * sizeof(efi_char), valstr);
free(var);
return (rv);
}
/*
* efi_delenv -- deletes the specified env variable
*/
EFI_STATUS
efi_delenv(EFI_GUID *guid, const char *name)
{
CHAR16 *var;
size_t len;
EFI_STATUS rv;
var = NULL;
if (utf8_to_ucs2(name, &var, &len) != 0)
return (EFI_OUT_OF_RESOURCES);
rv = RS->SetVariable(var, guid, 0, 0, NULL);
free(var);
return (rv);
}
EFI_STATUS
efi_freebsd_delenv(const char *name)
{
return (efi_delenv(&FreeBSDBootVarGUID, name));
}
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