libfwupdplugin: Implement fu-efivar-freebsd.c

Signed-off-by: Richard Hughes <richard@hughsie.com>

Author: mkopec

libfwupdplugin/fu-efivar-freebsd.c

@@ -0,0 +1,185 @@
+/*
+ * Copyright (C) 2021 Richard Hughes <richard@hughsie.com>
+ * Copyright (C) 2021 Norbert Kamiński <norbert.kaminski@3mdeb.com>
+ * Copyright (C) 2021 Michał Kopeć <michal.kopec@3mdeb.com>
+ * Copyright (C) 2021 Sergii Dmytruk <sergii.dmytruk@3mdeb.com>
+ *
+ * SPDX-License-Identifier: LGPL-2.1+
+ */
+
+#include "config.h"
+
+#include <efivar.h>
+
+#include "fu-efivar-impl.h"
+
+#include "fwupd-error.h"
+
+gboolean
+fu_efivar_supported_impl (GError **error)
+{
+	if (efi_variables_supported () == 0) {
+		g_set_error (error,
+			     FWUPD_ERROR,
+			     FWUPD_ERROR_NOT_SUPPORTED,
+			     "kernel efivars support missing");
+		return FALSE;
+	}
+	return TRUE;
+}
+
+gboolean
+fu_efivar_delete_impl (const gchar *guid, const gchar *name, GError **error)
+{
+	efi_guid_t guidt;
+	efi_str_to_guid (guid, &guidt);
+
+	if (efi_del_variable (guidt, name) == 0)
+		return TRUE;
+
+	g_set_error (error,
+		     G_IO_ERROR,
+		     G_IO_ERROR_INVALID_DATA,
+		     "failed to delete efivar %s", name);
+	return FALSE;
+}
+
+gboolean
+fu_efivar_delete_with_glob_impl (const gchar *guid, const gchar *name_glob, GError **error)
+{
+	efi_guid_t *guidt = NULL;
+	gchar *name = NULL;
+	gboolean rv = FALSE;
+	efi_guid_t guid_to_delete;
+
+	efi_str_to_guid (guid, &guid_to_delete);
+
+	while (efi_get_next_variable_name (&guidt, &name)) {
+		if (memcmp (&guid_to_delete, guidt, sizeof (guidt)) != 0)
+			continue;
+		if (!fu_common_fnmatch (name, name_glob))
+			continue;
+		rv = fu_efivar_delete (guid, name, error);
+		if (!rv)
+			break;
+	}
+	return rv;
+}
+
+static gboolean
+fu_efivar_exists_guid (const gchar *guid)
+{
+	efi_guid_t *guidt = NULL;
+	gchar *name = NULL;
+	efi_guid_t test;
+
+	efi_str_to_guid (guid, &test);
+	while (efi_get_next_variable_name (&guidt, &name)) {
+		if (memcmp (&test, guidt, sizeof (test)) == 0) {
+			return TRUE;
+		}
+	}
+	return FALSE;
+}
+
+gboolean
+fu_efivar_exists_impl (const gchar *guid, const gchar *name)
+{
+	/* any name */
+	if (name == NULL)
+		return fu_efivar_exists_guid (guid);
+
+	return fu_efivar_get_data (guid, name, NULL, NULL, NULL, NULL);
+}
+
+gboolean
+fu_efivar_get_data_impl (const gchar *guid, const gchar *name, guint8 **data,
+			 gsize *data_sz, guint32 *attr, GError **error)
+{
+	efi_guid_t guidt;
+	efi_str_to_guid (guid, &guidt);
+	return (efi_get_variable (guidt, name, data, data_sz, attr) != 0);
+}
+
+
+GPtrArray *
+fu_efivar_get_names_impl (const gchar *guid, GError **error)
+{
+	const gchar *name_guid;
+	g_autoptr(GPtrArray) names = g_ptr_array_new_with_free_func (g_free);
+	efi_guid_t *guidt = NULL;
+	gchar *name = NULL;
+	efi_guid_t test;
+	efi_str_to_guid (guid, &test);
+
+	/* find names with matching GUID */
+	while (efi_get_next_variable_name (&guidt, &name)) {
+		if (memcmp (&test, guidt, sizeof (test)) == 0) {
+			g_ptr_array_add (names, g_strdup (name));
+		}
+	}
+
+	/* nothing found */
+	if (names->len == 0) {
+		g_set_error (error,
+			     G_IO_ERROR,
+			     G_IO_ERROR_NOT_FOUND,
+			     "no names for GUID %s", guid);
+		return NULL;
+	}
+
+	/* success */
+	return g_steal_pointer (&names);
+}
+
+GFileMonitor *
+fu_efivar_get_monitor_impl (const gchar *guid, const gchar *name, GError **error)
+{
+	g_set_error_literal (error,
+			     FWUPD_ERROR,
+			     FWUPD_ERROR_NOT_SUPPORTED,
+			     "efivarfs monitoring not supported on FreeBSD");
+	return NULL;
+}
+
+guint64
+fu_efivar_space_used_impl (GError **error)
+{
+	guint64 total = 0;
+	efi_guid_t *guidt = NULL;
+	char *name = NULL;
+
+	while (efi_get_next_variable_name (&guidt, &name)) {
+		size_t size = 0;
+		if (efi_get_variable_size (*guidt, name, &size) < 0) {
+			g_set_error (error,
+					G_IO_ERROR,
+					G_IO_ERROR_FAILED,
+					"failed to get efivar size");
+			return G_MAXUINT64;
+		}
+		total += size;
+	}
+
+	/* success */
+	return total;
+}
+
+gboolean
+fu_efivar_set_data_impl (const gchar *guid, const gchar *name, const guint8 *data,
+			 gsize sz, guint32 attr, GError **error)
+{
+	efi_guid_t guidt;
+	efi_str_to_guid (guid, &guidt);
+
+	if (efi_set_variable (guidt, name, data, sz, attr) != 0) {
+		g_set_error (error,
+			     G_IO_ERROR,
+			     G_IO_ERROR_FAILED,
+			     "failed to write data to efivar %s", name);
+		return FALSE;
+	}
+
+	/* success */
+	return TRUE;
+}

libfwupdplugin/fu-efivar-impl.h

@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2018 Richard Hughes <richard@hughsie.com>
+ * Copyright (C) 2015 Peter Jones <pjones@redhat.com>
+ *
+ * SPDX-License-Identifier: LGPL-2.1+
+ */
+
+#pragma once
+
+#include "fu-efivar.h"
+
+gboolean	 fu_efivar_supported_impl	(GError		**error);
+guint64		 fu_efivar_space_used_impl	(GError		**error);
+gboolean	 fu_efivar_exists_impl		(const gchar	*guid,
+						 const gchar	*name);
+GFileMonitor	*fu_efivar_get_monitor_impl	(const gchar	*guid,
+						 const gchar	*name,
+						 GError		**error);
+gboolean	 fu_efivar_get_data_impl	(const gchar	*guid,
+						 const gchar	*name,
+						 guint8		**data,
+						 gsize		*data_sz,
+						 guint32	*attr,
+						 GError		**error);
+gboolean	 fu_efivar_set_data_impl	(const gchar	*guid,
+						 const gchar	*name,
+						 const guint8	*data,
+						 gsize		 sz,
+						 guint32	 attr,
+						 GError		**error);
+gboolean	 fu_efivar_delete_impl		(const gchar	*guid,
+						 const gchar	*name,
+						 GError		**error);
+gboolean	 fu_efivar_delete_with_glob_impl(const gchar	*guid,
+						 const gchar	*name_glob,
+						 GError		**error);
+GPtrArray	*fu_efivar_get_names_impl	(const gchar	*guid,
+						 GError		**error);