sgdisk program, misc. bug fixes
diff --git a/bsd.h b/bsd.h
index c92cfb0..afdb60c 100644
--- a/bsd.h
+++ b/bsd.h
@@ -13,14 +13,16 @@
#define BSD_SIGNATURE UINT32_C(0x82564557) /* BSD disklabel signature ("magic") */
-#define LABEL_OFFSET1 64 /* BSD disklabels can start at one of these two */
-#define LABEL_OFFSET2 512 /* values; check both for valid signatures */
+#define LABEL_OFFSET1 64 /* BSD disklabels can start at any of these three */
+#define LABEL_OFFSET2 512 /* values; check all for valid signatures */
+#define LABEL_OFFSET3 2048
// FreeBSD documents a maximum # of partitions of 8, but I saw 16 on a NetBSD
// disk. I'm quadrupling that for further safety. Note that BSDReadData()
-// uses a 2048-byte I/O buffer. In combination with LABEL_OFFSET2 and the
+// uses a 4096-byte I/O buffer. In combination with LABEL_OFFSET3 and the
// additional 148-byte offset to the actual partition data, that gives a
-// theoretical maximum of 86.75 partitions that the program can handle.
+// theoretical maximum of 118.75 partitions that the program can handle before
+// memory errors will occur.
#define MAX_BSD_PARTS 64
@@ -47,7 +49,7 @@
uint16_t pcpg; // filesystem cylinders per group
};
-// Full data in tweaked MBR format
+// Full data in tweaked BSD format
class BSDData {
protected:
// We only need a few items from the main BSD disklabel data structure....