Adds slice_type_name() which extends chunk_n[] for subtype's too.

Curorary review by:	phk

4 files changed, 63 insertions, 1 deletions

diff --git a/lib/libdisk/Makefile b/lib/libdisk/Makefile
index ad8c67f..773d58a 100644
--- a/lib/libdisk/Makefile
+++ b/lib/libdisk/Makefile
@@ -37,7 +37,8 @@ MLINKS+=	libdisk.3 Open_Disk.3 \
 		libdisk.3 MakeDev.3 \
 		libdisk.3 MakeDevDisk.3 \
 		libdisk.3 ShowChunkFlags.3 \
-		libdisk.3 ChunkCanBeRoot.3
+		libdisk.3 ChunkCanBeRoot.3 \
+		libdisk.3 slice_type_name.3
 
 .include <bsd.lib.mk>
 
diff --git a/lib/libdisk/disk.c b/lib/libdisk/disk.c
index 9d8ec9f..8f16ffc 100644
--- a/lib/libdisk/disk.c
+++ b/lib/libdisk/disk.c
@@ -347,3 +347,40 @@ Set_Boot_Blocks(struct disk *d, const u_char *b1, const u_char *b2)
 	if(!d->boot2) err(1,"malloc failed");
 	memcpy(d->boot2,b2,15*512);
 }
+
+const char *
+slice_type_name( int type, int subtype )
+{
+	switch (type) {
+		case 0:		return "whole";
+		case 1:		switch (subtype) {
+					case 1:		return "fat (12-bit)";
+					case 2:		return "XENIX /";
+					case 3:		return "XENIX /usr";
+					case 4:		return "fat (16-bit)";
+					case 5:		return "extended DOS";
+					case 6:		return "fat (>32Mb)";
+					case 7:		return "NTFS/HPFS";
+					case 10:	return "OS/2 bootmgr";
+					case 84:	return "OnTrack diskmgr";
+					case 100:	return "Netware 2.x";
+					case 101:	return "Netware 3.x";
+					case 128:	return "Minix 1.1";
+					case 129:	return "Minix 1.5";
+					case 130:	return "linux_swap";
+					case 131:	return "ext2fs";
+					case 183:	return "bsd/os";
+					case 184:	return "bsd/os swap";
+					default:	return "unknown";
+				}
+		case 2:		return "fat";
+		case 3:		switch (subtype) {
+					case 165:	return "freebsd";
+					default:	return "unknown";
+				}
+		case 4:		return "extended";
+		case 5:		return "part";
+		case 6:		return "unused";
+		default:	return "unknown";
+	}
+}
diff --git a/lib/libdisk/libdisk.3 b/lib/libdisk/libdisk.3
index 0e44b80..83a26f7 100644
--- a/lib/libdisk/libdisk.3
+++ b/lib/libdisk/libdisk.3
@@ -57,11 +57,19 @@
 .Nm MakeDevDisk ,
 .Nm ShowChunkFlags ,
 .Nm ChunkCanBeRoot ,
+.Nm chunk_n ,
+.Nm slice_type_name
 .Nd library interface to slice and partition labels
 .Sh SYNOPSIS
 .Fd #include <sys/types.h>
 .Fd #include <libdisk.h>
 .Dv extern const u_char *boot1, boot2;
+.\"		What is the correct way to cause a single line break ???
+.Bd -literal
+.Dv extern const char *chunk_n[];
+.Ed
+.Ft const char *
+.Fn slice_type_name "int type" "int subtype"
 .Ft struct disk *
 .Fn Open_Disk "const char *devname"
 .Ft struct disk *
@@ -310,6 +318,17 @@ returns a string to show flags.
 .Pp
 .Fn ChunkCanBeRoot
 returns NULL if chunk can be
+.Pp
+Chunk name strings can be accessed directly using the external array
+.Va chunk_n .
+.Pp
+.Fn slice_type_name
+returns the name strings associated with the specified 
+.Ql type .
+.Ql subtype .
+If
+.Fn slice_type_name
+returns "unknown" for slices it isn't familar with.
 .Ql / .
 .Sh AUTHOR
 .Nm Libdisk
diff --git a/lib/libdisk/libdisk.h b/lib/libdisk/libdisk.h
index e029fbf..425ca0b 100644
--- a/lib/libdisk/libdisk.h
+++ b/lib/libdisk/libdisk.h
@@ -86,6 +86,11 @@ struct chunk {
 extern const char *chunk_n[];
 extern const u_char boot1[], boot2[];
 
+const char *
+slice_type_name( int type, int subtype );
+/* "chunk_n" for subtypes too
+ */
+
 struct disk *
 Open_Disk(const char *devname);
 /* Will open the named disk, and return populated tree.