From f7bf327ed4f468193062d32f7b6bb2cc4b521e9b Mon Sep 17 00:00:00 2001
From: phk <phk@FreeBSD.org>
Date: Sat, 29 Apr 1995 01:55:25 +0000
Subject: Sanitize and explain a little bit...  Implement the first rules...

---
 lib/libdisk/libdisk.h | 105 ++++++++++++++++++++++++++++++++++++++------------
 1 file changed, 80 insertions(+), 25 deletions(-)

(limited to 'lib/libdisk/libdisk.h')

diff --git a/lib/libdisk/libdisk.h b/lib/libdisk/libdisk.h
index 04c5a2f..2946f90 100644
--- a/lib/libdisk/libdisk.h
+++ b/lib/libdisk/libdisk.h
@@ -1,13 +1,25 @@
+/*
+ * ----------------------------------------------------------------------------
+ * "THE BEER-WARE LICENSE" (Revision 42):
+ * <phk@login.dknet.dk> wrote this file.  As long as you retain this notice you
+ * can do whatever you want with this stuff. If we meet some day, and you think
+ * this stuff is worth it, you can buy me a beer in return.   Poul-Henning Kamp
+ * ----------------------------------------------------------------------------
+ *
+ * $Id$
+ *
+ */
 
 typedef enum {whole, foo, fat, freebsd, extended, part, unused, reserved} chunk_e;
+
 #define CHAR_N static char *chunk_n[] = { \
 	"whole","foo","fat","freebsd","extended","part","unused","reserved"};
 
 struct disk {
 	char		*name;
 	u_long		flags;
-#define DISK_ON_TRACK	1
-#define DISK_REAL_GEOM	2
+#		define DISK_ON_TRACK	1
+#		define DISK_REAL_GEOM	2
 	u_long		real_cyl;
 	u_long		real_hd;
 	u_long		real_sect;
@@ -26,36 +38,79 @@ struct chunk {
 	char		*name;
 	chunk_e		type;
 	int		subtype;
-#define SUBTYPE_BSD_FS          1
-#define SUBTYPE_BSD_SWAP        2
-#define SUBTYPE_BSD_UNUSED      3
+#		define SUBTYPE_BSD_FS          1
+#		define SUBTYPE_BSD_SWAP        2
+#		define SUBTYPE_BSD_UNUSED      3
 	u_long		flags;
-#define CHUNK_PAST_1024		1
-	/* this chunk cannot be booted from */
-#define CHUNK_BSD_COMPAT	2
-	/* this chunk is in the BSD-compatibility, and has a short name
-         * too, ie wd0s4f -> wd0f
-         */ 
-#define CHUNK_BAD144		4
-	/* this chunk has bad144 mapping */
-#define CHUNK_ALIGN		8
+#		define CHUNK_PAST_1024		1
+			/* this chunk cannot be booted from */
+#		define CHUNK_BSD_COMPAT	2
+			/* this chunk is in the BSD-compatibility, and has a 
+			 * short name too, ie wd0s4f -> wd0f
+         		*/ 
+#		define CHUNK_BAD144		4
+			/* this chunk has bad144 mapping */
+#		define CHUNK_ALIGN		8
 };
 
-struct disk *Open_Disk(char *devname);
-void Free_Disk(struct disk *disk);
-void Debug_Disk(struct disk *disk);
-struct disk *Clone_Disk(struct disk *disk);
+struct disk *
+Open_Disk(char *devname);
+	/* Will open the named disk, and return populated tree.
+	 */	
+
+struct disk *
+Clone_Disk(struct disk *disk);
+	/* Clone a copy of a tree.  Useful for "Undo" functionality
+	 */
+
+void 
+Free_Disk(struct disk *disk);
+	/* Free a tree made with Open_Disk() or Clone_Disk()
+	 */
+
+void
+Debug_Disk(struct disk *disk);
+	/* Print the content of the tree to stdout
+	 */
+
+struct disk *
+Set_Phys_Geom(struct disk *disk, u_long cyl, u_long heads, u_long sects);
+	/* Use a different physical geometry.  Makes sense for ST506 disks only.
+	 * The tree returned is read from the disk, using this geometry.
+	 */
+
+void 
+Set_Bios_Geom(struct disk *disk, u_long cyl, u_long heads, u_long sects);
+	/* Set the geometry the bios uses.
+	 */
+
+int 
+Delete_Chunk(struct disk *disk, struct chunk *);
+	/* Free a chunk of disk_space 
+	 */
 
-struct disk *Set_Phys_Geom(struct disk *disk, u_long cyl, u_long heads, u_long sects);
-void Set_Bios_Geom(struct disk *disk, u_long cyl, u_long heads, u_long sects);
+void
+Collapse_Disk(struct disk *disk);
+	/* Experimental, do not use.
+	 */
+int
+Collapse_Chunk(struct disk *disk, struct chunk *chunk);
+	/* Experimental, do not use.
+	 */
 
-int Delete_Chunk(struct disk *disk, u_long offset, u_long end, chunk_e type);
-void Collapse_Disk(struct disk *disk);
-int Collapse_Chunk(struct disk *disk, struct chunk *chunk);
+int 
+Create_Chunk(struct disk *disk, u_long offset, u_long size, chunk_e type, int subtype, u_long flags);
+	/* Create a chunk with the specified paramters
+	 */
 
-int Create_Chunk(struct disk *disk, u_long offset, u_long size, chunk_e type, int subtype, u_long flags);
+char * 
+CheckRules(struct disk *);
+	/* Return char* to warnings about broken design rules in this disklayout
+	 */
 
-/* Implementation details */
+/* 
+ * Implementation details  >>> DO NOT USE <<<
+ */
 
 struct disk *Int_Open_Disk(char *devname, u_long maxsize);
 
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