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