2 * Copyright (c) 2018 Netflix, Inc.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 #include <sys/cdefs.h>
32 static EFI_GUID FreeBSDBootVarGUID = FREEBSD_BOOT_VAR_GUID;
33 static EFI_GUID GlobalBootVarGUID = EFI_GLOBAL_VARIABLE;
36 efi_getenv(EFI_GUID *g, const char *v, void *data, size_t *len)
45 if (utf8_to_ucs2(v, &uv, &ul) != 0)
46 return (EFI_OUT_OF_RESOURCES);
48 rv = RS->GetVariable(uv, g, &attr, &dl, data);
49 if (rv == EFI_SUCCESS || rv == EFI_BUFFER_TOO_SMALL)
56 efi_global_getenv(const char *v, void *data, size_t *len)
59 return (efi_getenv(&GlobalBootVarGUID, v, data, len));
63 efi_freebsd_getenv(const char *v, void *data, size_t *len)
66 return (efi_getenv(&FreeBSDBootVarGUID, v, data, len));
70 * efi_setenv -- Sets an env variable.
73 efi_setenv(EFI_GUID *guid, const char *varname, UINT32 attr, void *data, __size_t len)
80 if (utf8_to_ucs2(varname, &uv, &ul) != 0)
81 return (EFI_OUT_OF_RESOURCES);
83 rv = RS->SetVariable(uv, guid, attr, len, data);
89 efi_setenv_freebsd_wcs(const char *varname, CHAR16 *valstr)
95 if (utf8_to_ucs2(varname, &var, &len) != 0)
96 return (EFI_OUT_OF_RESOURCES);
97 rv = RS->SetVariable(var, &FreeBSDBootVarGUID,
98 EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
99 (ucs2len(valstr) + 1) * sizeof(efi_char), valstr);
105 * efi_delenv -- deletes the specified env variable
108 efi_delenv(EFI_GUID *guid, const char *name)
115 if (utf8_to_ucs2(name, &var, &len) != 0)
116 return (EFI_OUT_OF_RESOURCES);
118 rv = RS->SetVariable(var, guid, 0, 0, NULL);
124 efi_freebsd_delenv(const char *name)
126 return (efi_delenv(&FreeBSDBootVarGUID, name));