Author: imp
Date: Thu Apr 18 05:40:50 2019
New Revision: 346346
URL: https://svnweb.freebsd.org/changeset/base/346346
Log:
Add efi_delenv
Add an interface to remove / delete UEFI variables.
Modified:
head/stand/efi/include/efilib.h
head/stand/efi/libefi/efienv.c
Modified: head/stand/efi/include/efilib.h
==============================================================================
--- head/stand/efi/include/efilib.h Thu Apr 18 05:37:18 2019
(r346345)
+++ head/stand/efi/include/efilib.h Thu Apr 18 05:40:50 2019
(r346346)
@@ -122,6 +122,7 @@ void cpy16to8(const CHAR16 *, char *, size_t);
* the loader setting / getting FreeBSD specific variables.
*/
+EFI_STATUS efi_delenv(EFI_GUID *guid, const char *varname);
EFI_STATUS efi_freebsd_getenv(const char *v, void *data, __size_t *len);
EFI_STATUS efi_getenv(EFI_GUID *g, const char *v, void *data, __size_t *len);
EFI_STATUS efi_global_getenv(const char *v, void *data, __size_t *len);
Modified: head/stand/efi/libefi/efienv.c
==============================================================================
--- head/stand/efi/libefi/efienv.c Thu Apr 18 05:37:18 2019
(r346345)
+++ head/stand/efi/libefi/efienv.c Thu Apr 18 05:40:50 2019
(r346346)
@@ -103,3 +103,21 @@ efi_setenv_freebsd_wcs(const char *varname, CHAR16 *va
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;
+}
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