[src/trunk]: src/sbin/gpt print the current map type.

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/52d617123d2f
branches:  trunk
changeset: 341916:52d617123d2f
user:      christos <christos%NetBSD.org@localhost>
date:      Sun Nov 29 00:34:39 2015 +0000

description:
print the current map type.

diffstat:

 sbin/gpt/map.c |  39 ++++++++++++++++++++++++++++-----------
 1 files changed, 28 insertions(+), 11 deletions(-)

diffs (64 lines):

diff -r bde4f8b68a08 -r 52d617123d2f sbin/gpt/map.c
--- a/sbin/gpt/map.c    Sun Nov 29 00:15:12 2015 +0000
+++ b/sbin/gpt/map.c    Sun Nov 29 00:34:39 2015 +0000
@@ -33,7 +33,7 @@
 __FBSDID("$FreeBSD: src/sbin/gpt/map.c,v 1.6 2005/08/31 01:47:19 marcel Exp $");
 #endif
 #ifdef __RCSID
-__RCSID("$NetBSD: map.c,v 1.8 2015/11/29 00:15:12 christos Exp $");
+__RCSID("$NetBSD: map.c,v 1.9 2015/11/29 00:34:39 christos Exp $");
 #endif
 
 #include <sys/types.h>
@@ -65,6 +65,26 @@
        return (m);
 }
 
+static const char *maptypes[]  = {
+       "unused",
+       "mbr",
+       "mbr partition",
+       "primary gpt header",
+       "secondary gpt header",
+       "primary gpt table",
+       "secondary gpt table",
+       "gpt partition",
+       "protective mbr",
+};
+
+static const char *
+map_type(int t)
+{
+       if ((size_t)t >= __arraycount(maptypes))
+               return "*unknown*";
+       return maptypes[t];
+}
+
 map_t *
 map_add(off_t start, off_t size, int type, void *data)
 {
@@ -99,17 +119,14 @@
                return (n);
        }
 
-       
-       switch (n->map_type) {
-       case MAP_TYPE_MBR_PART:
-       case MAP_TYPE_GPT_PART:
+       if (n->map_type != MAP_TYPE_UNUSED) {
+               if (n->map_type != MAP_TYPE_MBR_PART ||
+                   type != MAP_TYPE_GPT_PART) {
+                       warnx("bogus map current=%s new=%s",
+                           map_type(n->map_type), map_type(type));
+                       return (NULL);
+               }
                n->map_type = MAP_TYPE_UNUSED;
-               break;
-       case MAP_TYPE_UNUSED:
-               break;
-       default:
-               warnx("bogus map %#x", n->map_type);
-               return (NULL);
        }
 
        m = mkmap(start, size, type);