1 files changed, 68 insertions, 0 deletions
diff --git a/usr.sbin/fstyp/befs.c b/usr.sbin/fstyp/befs.c
new file mode 100644
index 000000000000..6c204f7eb381
--- /dev/null
+++ b/usr.sbin/fstyp/befs.c
@@ -0,0 +1,68 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2021 Miguel Gocobachi
+ *
+ * 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>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "fstyp.h"
+
+#define B_OS_NAME_LENGTH	32
+#define BEFS_BLOCK_OFFSET	512
+#define BEFS_SUPER_BLOCK_MAGIC1	0x42465331
+
+struct disk_super_block {
+    char	name[B_OS_NAME_LENGTH];
+    int32_t	magic1;
+};
+
+int
+fstyp_befs(FILE *fp, char *label, size_t size)
+{
+	struct disk_super_block *volume;
+
+	volume = read_buf(fp, BEFS_BLOCK_OFFSET, sizeof(*volume));
+
+	if (volume == NULL) {
+		return (1);
+	}
+
+	if (volume->magic1 == BEFS_SUPER_BLOCK_MAGIC1) {
+		strlcpy(label, volume->name, size);
+		free(volume);
+
+		return (0);
+	}
+
+	free(volume);
+
+	return (1);
+}