add hide and unhide commands. add additional minix fs support. some code cleanups.

ChangeLog

@@ -1,3 +1,48 @@
+1999-08-30  OKUJI Yoshinori  <okuji@kuicr.kyoto-u.ac.jp>
+
+	From Edward Killips <ekillips@triton.net>:
+	* stage2/cmdline.c (commands): Added hide and unhide.
+	(enter_cmdline): Likewise.
+	* stage2/disk_io.c (unhide_partition): New function.
+	(hide_partition): Likewise.
+	* stage2/pc_slice.h (PC_SLICE_TYPE_HIDDEN_FLAG): New macro.
+	
+1999-08-29  OKUJI Yoshinori  <okuji@kuicr.kyoto-u.ac.jp>
+
+	From Pavel Roskin <pavel_roskin@geocities.com>:
+	* stage2/fsys_minix.c (namelen): New variable.
+	(MINIX_NAME_LEN): Deleted.
+	(minix_mount): Set NAMELEN to 14 if SUPRTBLOCK->S_MAGIC is
+	MINIX_SUPER_MAGIC, and set NAMELEN to 30 if it is
+	MINIX_SUPER_MAGIC2.
+	(minix_dir): Use NAMELEN instead of MINIX_NAME_LEN.
+	
+1999-08-29  Pavel Roskin  <pavel_roslin@geocities.com>
+
+	* grub/Makefile.am, stage1/Makefile.am, stage2/Makefile.am:
+	Avoid using variables inclosed in '@' because they cannot be
+	overridden at the make time.
+
+1999-08-29  Pavel Roskin  <pavel_roskin@geocities.com>
+
+	* stage2/fsys_fat.c (fat_create_blocklist): Return 1 for the
+	root directory on FAT12 and FAT16.
+	
+1999-08-27  OKUJI Yoshinori  <okuji@kuicr.kyoto-u.ac.jp>
+
+	* stage2/boot.c (load_image): Accept two arguments, KERNEL and
+	ARG. And use them instead of CUR_CMDLINE.
+	(load_module): Accept two arguments, MODULE and ARG. And use
+	them instead of CUR_CMDLINE.
+	(load_initrd): Accept one argument, INITRD. And use it instead
+	of CUR_CMDLINE.
+	(bsd_boot): Accept one additional argument, ARG. And use it
+	instead of CUR_CMDLINE.
+	* stage2/cmdline.c (enter_cmdline): Use MB_CMDLINE instead of
+	HEAP for the Multiboot command-line buffer.
+	* stage2/shared.h (MB_CMDLINE_BUF): New macro.
+	(MB_CMDLINE_BUFLEN): Likewise.
+	
 1999-08-26  OKUJI Yoshinori  <okuji@kuicr.kyoto-u.ac.jp>
 
 	* docs/Makefile.am [GRUB_MAINT] (grub.8): The argument for the

NEWS

@@ -8,6 +8,7 @@ New in 0.5.93:
   ext2fs, FAT and FFS support in Stage 2 respectively.
 * FAT32 support is added.
 * Minix fs support is added.
+* The new commands "hide" and "unhide" are added.
 
 New in 0.5.92 - 1999-07-26:
 * Bug fixes (i.e. Stage 1.5 can work fine again).

THANKS

@@ -11,6 +11,7 @@ Bradford Hovinen <hovinen@redrose.net>
 Brian Brunswick <brian@skarpsey.demon.co.uk>
 Bryan Ford <baford@cs.utah.edu>
 Dan J. Walters <djw@cs.utexas.edu>
+Edward Killips <ekillips@triton.net>
 Eric Hanchrow <erich@microsoft.com>
 Heiko Schroeder <heiko@pool.informatik.rwth-aachen.de>
 Jochen Hoenicke <jochen@gnu.org>

TODO

@@ -35,6 +35,4 @@ Clean up and enhance the manuals, especially concept indexes.
 
 Add more filesystems support (XFS, NTFS, etc.)
 
-??? Add hide and unhide facilities.
-
 Add remote console support (serial, parallel and net).

grub/Makefile.am

@@ -1,8 +1,8 @@
 sbin_PROGRAMS = grub
 
-AM_CFLAGS = @GRUB_CFLAGS@ -DGRUB_UTIL=1 -DFSYS_EXT2FS=1 -DFSYS_FAT=1 \
+AM_CFLAGS = $(GRUB_CFLAGS) -DGRUB_UTIL=1 -DFSYS_EXT2FS=1 -DFSYS_FAT=1 \
 	-DFSYS_FFS=1 -DFSYS_MINIX=1 -fwritable-strings \
 	-I$(top_srcdir)/stage2 -I$(top_srcdir)/stage1
 
 grub_SOURCES = main.c asmstub.c getopt.c getopt1.c getopt.h
-grub_LDADD = ../stage2/libgrub.a @GRUB_LIBS@
+grub_LDADD = ../stage2/libgrub.a $(GRUB_LIBS)

grub/Makefile.in

@@ -81,13 +81,13 @@ install_sh = @install_sh@
 
 sbin_PROGRAMS = grub
 
-AM_CFLAGS = @GRUB_CFLAGS@ -DGRUB_UTIL=1 -DFSYS_EXT2FS=1 -DFSYS_FAT=1 \
+AM_CFLAGS = $(GRUB_CFLAGS) -DGRUB_UTIL=1 -DFSYS_EXT2FS=1 -DFSYS_FAT=1 \
 	-DFSYS_FFS=1 -DFSYS_MINIX=1 -fwritable-strings \
 	-I$(top_srcdir)/stage2 -I$(top_srcdir)/stage1
 
 
 grub_SOURCES = main.c asmstub.c getopt.c getopt1.c getopt.h
-grub_LDADD = ../stage2/libgrub.a @GRUB_LIBS@
+grub_LDADD = ../stage2/libgrub.a $(GRUB_LIBS)
 subdir = grub
 mkinstalldirs = $(SHELL) $(top_srcdir)/mkinstalldirs
 CONFIG_CLEAN_FILES = 

stage1/Makefile.am

@@ -3,7 +3,7 @@ nodist_pkgdata_DATA = stage1 stage1_lba
 CLEANFILES = $(pkgdata_DATA)
 
 # We can't use builtins or standard includes.
-AM_CFLAGS = @STAGE1_CFLAGS@ -fno-builtin -nostdinc
+AM_CFLAGS = $(STAGE1_CFLAGS) -fno-builtin -nostdinc
 LDFLAGS = -nostdlib -Wl,-N -Wl,-Ttext -Wl,7C00
 
 noinst_PROGRAMS = stage1.exec stage1_lba.exec

stage1/Makefile.in

@@ -82,7 +82,7 @@ nodist_pkgdata_DATA = stage1 stage1_lba
 CLEANFILES = $(pkgdata_DATA)
 
 # We can't use builtins or standard includes.
-AM_CFLAGS = @STAGE1_CFLAGS@ -fno-builtin -nostdinc
+AM_CFLAGS = $(STAGE1_CFLAGS) -fno-builtin -nostdinc
 LDFLAGS = -nostdlib -Wl,-N -Wl,-Ttext -Wl,7C00
 
 noinst_PROGRAMS = stage1.exec stage1_lba.exec

stage2/Makefile.am

@@ -16,7 +16,7 @@ noinst_LIBRARIES = libgrub.a
 libgrub_a_SOURCES = boot.c common.c char_io.c cmdline.c disk_io.c \
 	gunzip.c fsys_ffs.c fsys_ext2fs.c fsys_fat.c fsys_minix.c \
 	stage2.c
-libgrub_a_CFLAGS = @GRUB_CFLAGS@ -DGRUB_UTIL=1 -DFSYS_EXT2FS=1 \
+libgrub_a_CFLAGS = $(GRUB_CFLAGS) -DGRUB_UTIL=1 -DFSYS_EXT2FS=1 \
 	-DFSYS_FAT=1 -DFSYS_FFS=1 -DFSYS_MINIX=1 -fwritable-strings
 
 # Stage 2 and Stage 1.5's.
@@ -29,7 +29,7 @@ noinst_PROGRAMS = stage2.exec e2fs_stage1_5.exec fat_stage1_5.exec \
 MOSTLYCLEANFILES = $(noinst_PROGRAMS)
 
 STAGE2_LINK = -nostdlib -Wl,-N -Wl,-Ttext -Wl,8000
-STAGE2_COMPILE = @STAGE2_CFLAGS@ -fno-builtin -nostdinc
+STAGE2_COMPILE = $(STAGE2_CFLAGS) -fno-builtin -nostdinc
 
 STAGE1_5_LINK = -nostdlib -Wl,-N -Wl,-Ttext -Wl,2000
 STAGE1_5_COMPILE = $(STAGE2_COMPILE) -DNO_DECOMPRESSION=1 -DSTAGE1_5=1 \
@@ -40,7 +40,7 @@ STAGE1_5_COMPILE = $(STAGE2_COMPILE) -DNO_DECOMPRESSION=1 -DSTAGE1_5=1 \
 stage2_exec_SOURCES = asm.S boot.c common.c char_io.c cmdline.c \
 	disk_io.c gunzip.c stage2.c bios.c smp-imps.c fsys_ext2fs.c \
 	fsys_fat.c fsys_ffs.c fsys_minix.c
-stage2_exec_CFLAGS = $(STAGE2_COMPILE) @FSYS_CFLAGS@
+stage2_exec_CFLAGS = $(STAGE2_COMPILE) $(FSYS_CFLAGS)
 stage2_exec_LDFLAGS = $(STAGE2_LINK)
 
 # For e2fs_stage1_5 target.

stage2/Makefile.in

@@ -98,7 +98,7 @@ libgrub_a_SOURCES = boot.c common.c char_io.c cmdline.c disk_io.c \
 	gunzip.c fsys_ffs.c fsys_ext2fs.c fsys_fat.c fsys_minix.c \
 	stage2.c
 
-libgrub_a_CFLAGS = @GRUB_CFLAGS@ -DGRUB_UTIL=1 -DFSYS_EXT2FS=1 \
+libgrub_a_CFLAGS = $(GRUB_CFLAGS) -DGRUB_UTIL=1 -DFSYS_EXT2FS=1 \
 	-DFSYS_FAT=1 -DFSYS_FFS=1 -DFSYS_MINIX=1 -fwritable-strings
 
 
@@ -114,7 +114,7 @@ noinst_PROGRAMS = stage2.exec e2fs_stage1_5.exec fat_stage1_5.exec \
 MOSTLYCLEANFILES = $(noinst_PROGRAMS)
 
 STAGE2_LINK = -nostdlib -Wl,-N -Wl,-Ttext -Wl,8000
-STAGE2_COMPILE = @STAGE2_CFLAGS@ -fno-builtin -nostdinc
+STAGE2_COMPILE = $(STAGE2_CFLAGS) -fno-builtin -nostdinc
 
 STAGE1_5_LINK = -nostdlib -Wl,-N -Wl,-Ttext -Wl,2000
 STAGE1_5_COMPILE = $(STAGE2_COMPILE) -DNO_DECOMPRESSION=1 -DSTAGE1_5=1 \
@@ -127,7 +127,7 @@ stage2_exec_SOURCES = asm.S boot.c common.c char_io.c cmdline.c \
 	disk_io.c gunzip.c stage2.c bios.c smp-imps.c fsys_ext2fs.c \
 	fsys_fat.c fsys_ffs.c fsys_minix.c
 
-stage2_exec_CFLAGS = $(STAGE2_COMPILE) @FSYS_CFLAGS@
+stage2_exec_CFLAGS = $(STAGE2_COMPILE) $(FSYS_CFLAGS)
 stage2_exec_LDFLAGS = $(STAGE2_LINK)
 
 # For e2fs_stage1_5 target.

stage2/boot.c

@@ -39,7 +39,7 @@ static struct mod_list mll[99];
  */
 
 int
-load_image (void)
+load_image (char *kernel, char *arg)
 {
   int len, i, exec_type = 0, align_4k = 1, type = 0;
   unsigned long flags = 0, text_len = 0, data_len = 0, bss_len = 0;
@@ -59,7 +59,7 @@ load_image (void)
      buffer by default */
   pu.aout = (struct exec *) buffer;
 
-  if (!grub_open (cur_cmdline))
+  if (!grub_open (kernel))
     return 0;
 
   if (!(len = grub_read (buffer, MULTIBOOT_SEARCH)) || len < 32)
@@ -213,7 +213,7 @@ load_image (void)
 	    char *vga;
 
 	    /* Find the substring "vga=".  */
-	    vga = grub_strstr (cur_cmdline, "vga=");
+	    vga = grub_strstr (arg, "vga=");
 	    if (vga)
 	      {
 		char *value = vga + 4;
@@ -250,7 +250,7 @@ load_image (void)
 
 	  /* copy command-line plus memory hack to staging area */
 	  {
-	    char *src = cur_cmdline;
+	    char *src = arg;
 	    char *dest = (char *) (CL_MY_LOCATION + 4);
 
 	    memmove ((char *) CL_MY_LOCATION, "mem=", 4);
@@ -290,7 +290,7 @@ load_image (void)
     return 0;
 
   /* fill the multiboot info structure */
-  mbi.cmdline = (int) cur_cmdline;
+  mbi.cmdline = (int) arg;
   mbi.mods_count = 0;
   mbi.mods_addr = 0;
   mbi.boot_device = (saved_drive << 24) | saved_partition;
@@ -473,14 +473,14 @@ load_image (void)
 }
 
 int
-load_module (void)
+load_module (char *module, char *arg)
 {
   int len;
 
   /* if we are supposed to load on 4K boundaries */
   cur_addr = (cur_addr + 0xFFF) & 0xFFFFF000;
 
-  if (!grub_open (cur_cmdline) || !(len = grub_read ((char *) cur_addr, -1)))
+  if (!grub_open (module) || !(len = grub_read ((char *) cur_addr, -1)))
     return 0;
 
   printf ("   [Multiboot-module @ 0x%x, 0x%x bytes]\n", cur_addr, len);
@@ -489,7 +489,7 @@ load_module (void)
   mbi.flags |= MB_INFO_MODS;
   mbi.mods_addr = (int) mll;
 
-  mll[mbi.mods_count].cmdline = (int) cur_cmdline;
+  mll[mbi.mods_count].cmdline = (int) arg;
   mll[mbi.mods_count].mod_start = cur_addr;
   cur_addr += len;
   mll[mbi.mods_count].mod_end = cur_addr;
@@ -502,12 +502,12 @@ load_module (void)
 }
 
 int
-load_initrd (void)
+load_initrd (char *initrd)
 {
   int len;
   long *ramdisk, moveto;
 
-  if (!grub_open (cur_cmdline) || !(len = grub_read ((char *) cur_addr, -1)))
+  if (! grub_open (initrd) || ! (len = grub_read ((char *) cur_addr, -1)))
     return 0;
 
   moveto = ((mbi.mem_upper + 0x400) * 0x400 - len) & 0xfffff000;
@@ -532,7 +532,7 @@ load_initrd (void)
 
 
 void
-bsd_boot (int type, int bootdev)
+bsd_boot (int type, int bootdev, char *arg)
 {
   char *str;
   int clval = 0, i;
@@ -540,8 +540,8 @@ bsd_boot (int type, int bootdev)
 
   stop_floppy ();
 
-  while (*(++cur_cmdline) && *cur_cmdline != ' ');
-  str = cur_cmdline;
+  while (*(++arg) && *arg != ' ');
+  str = arg;
   while (*str)
     {
       if (*str == '-')
@@ -579,10 +579,10 @@ bsd_boot (int type, int bootdev)
 
       bi.bi_version = BOOTINFO_VERSION;
 
-      *cur_cmdline = 0;
-      while ((--cur_cmdline) > (char *) (mbi.cmdline) && *cur_cmdline != '/');
-      if (*cur_cmdline == '/')
-	bi.bi_kernelname = cur_cmdline + 1;
+      *arg = 0;
+      while ((--arg) > (char *) MB_CMDLINE_BUF && *arg != '/');
+      if (*arg == '/')
+	bi.bi_kernelname = arg + 1;
       else
 	bi.bi_kernelname = 0;
 

stage2/cmdline.c

@@ -68,7 +68,7 @@ char commands[] =
 " Possible commands are: \"pause= ...\", \"uppermem= <kbytes>\", \"root= <device>\",
   \"rootnoverify= <device>\", \"chainloader= <file>\", \"kernel= <file> ...\",
   \"testload= <file>\", \"read= <addr>\", \"displaymem\", \"impsprobe\",
-  \"geometry= <drive>\",
+  \"geometry= <drive>\", \"hide= <device>\", \"unhide= <device>\",
   \"fstest\", \"debug\", \"module= <file> ...\", \"modulenounzip= <file> ...\",
   \"color= <normal> [<highlight>]\", \"makeactive\", \"boot\", \"quit\" and
   \"install= <stage1_file> [d] <dest_dev> <file> <addr> [p] [<config_file>]\"\n";
@@ -117,6 +117,7 @@ enter_cmdline (char *script, char *heap)
 {
   int bootdev, cmd_len, type = 0, run_cmdline = 1, have_run_cmdline = 0;
   char *cur_heap = heap, *cur_entry = script, *old_entry;
+  char *mb_cmdline = (char *) MB_CMDLINE_BUF;
   
   /* initialization */
   saved_drive = boot_drive;
@@ -185,20 +186,20 @@ returnit:
   if (run_cmdline && get_cmdline (PACKAGE "> ", commands, cur_heap, 2048, 0))
     return CMDLINE_ERROR;
 
-  if (substring("boot", cur_heap) == 0 || (script && !*cur_heap))
+  if (substring ("boot", cur_heap) == 0 || (script && !*cur_heap))
     {
       if ((type == 'f') | (type == 'n'))
-	bsd_boot(type, bootdev);
+	bsd_boot (type, bootdev, (char *) MB_CMDLINE_BUF);
       if (type == 'l')
-	linux_boot();
+	linux_boot ();
       if (type == 'L')
-	big_linux_boot();
+	big_linux_boot ();
 
       if (type == 'c')
 	{
-	  gateA20(0);
+	  gateA20 (0);
 	  boot_drive = saved_drive;
-	  chain_stage1(0, BOOTSEC_LOCATION, BOOTSEC_LOCATION-16);
+	  chain_stage1 (0, BOOTSEC_LOCATION, BOOTSEC_LOCATION-16);
 	}
 
       if (!type)
@@ -271,17 +272,21 @@ returnit:
 	    }
 	}
     }
-  else if (substring("kernel", cur_heap) < 1)
+  else if (substring ("kernel", cur_heap) < 1)
     {
-      /* make sure it's at the beginning of the boot heap area */
-      memmove (heap, cur_heap,
-	       cmd_len + (((int)cur_cmdline) - ((int)cur_heap)));
-      cur_cmdline = heap + (((int)cur_cmdline) - ((int)cur_heap));
-      cur_heap = heap;
-      if ((type = load_image()) != 0)
-	cur_heap = cur_cmdline + cmd_len;
+      /* Reset MB_CMDLINE.  */
+      mb_cmdline = (char *) MB_CMDLINE_BUF;
+      if (cmd_len + 1 > MB_CMDLINE_BUFLEN)
+	errnum = ERR_WONT_FIT;
+      else
+	{
+	  /* Copy the command-line to MB_CMDLINE.  */
+	  grub_memmove (mb_cmdline, cur_cmdline, cmd_len + 1);
+	  if ((type = load_image (cur_cmdline, mb_cmdline)) != 0)
+	    mb_cmdline += cmd_len + 1;
+	}
     }
-  else if (substring("module", cur_heap) < 1)
+  else if (substring ("module", cur_heap) < 1)
     {
       if (type == 'm')
 	{
@@ -292,8 +297,16 @@ returnit:
 	    no_decompression = 1;
 #endif  /* NO_DECOMPRESSION */
 	  
-	  if (load_module())
-	    cur_heap = cur_cmdline + cmd_len;
+	  if (mb_cmdline + cmd_len + 1
+	      > (char *) MB_CMDLINE_BUF + MB_CMDLINE_BUFLEN)
+	    errnum = ERR_WONT_FIT;
+	  else
+	    {
+	      /* Copy the command-line to MB_CMDLINE.  */
+	      grub_memmove (mb_cmdline, cur_cmdline, cmd_len + 1);
+	      if (load_module (cur_cmdline, mb_cmdline))
+		mb_cmdline += cmd_len + 1;
+	    }
 	  
 #ifndef NO_DECOMPRESSION
 	  no_decompression = 0;
@@ -301,7 +314,7 @@ returnit:
 	}
       else if (type == 'L' || type == 'l')
 	{
-	  load_initrd ();
+	  load_initrd (cur_cmdline);
 	}
       else
 	errnum = ERR_NEED_MB_KERNEL;
@@ -310,7 +323,7 @@ returnit:
     {
       if (type == 'L' || type == 'l')
 	{
-	  load_initrd ();
+	  load_initrd (cur_cmdline);
 	}
       else
 	errnum = ERR_NEED_LX_KERNEL;
@@ -693,6 +706,28 @@ returnit:
 	    }
 	}
     }
+  else if (substring ("hide", cur_heap) < 1)
+    {
+      set_device (cur_cmdline);
+      
+      if (! errnum)
+	{
+	  saved_partition = current_partition;
+	  saved_drive = current_drive;
+	  hide_partition ();
+        }
+    }
+  else if (substring ("unhide", cur_heap) < 1)
+    {
+      set_device (cur_cmdline);
+      
+      if (! errnum)
+	{
+	  saved_partition = current_partition;
+	  saved_drive = current_drive;
+	  unhide_partition ();
+        }
+    }
   else if (*cur_heap && *cur_heap != ' ')
     errnum = ERR_UNRECOGNIZED;
   

stage2/disk_io.c

@@ -311,6 +311,69 @@ make_saved_active (void)
   return 1;
 }
 
+int
+unhide_partition (void)
+{
+  if (saved_drive)
+    {
+      int part = saved_partition >> 16;
+      
+      if (part > 3)
+	{
+          errnum = ERR_NO_PART;
+          return 0;
+        }
+      
+      if (! rawread (saved_drive, 0, 0, SECTOR_SIZE, (char *) SCRATCHADDR))
+        return 0;
+      
+      if (PC_SLICE_TYPE (SCRATCHADDR, part) & PC_SLICE_TYPE_HIDDEN_FLAG)
+        {
+          PC_SLICE_TYPE (SCRATCHADDR, part) ^= PC_SLICE_TYPE_HIDDEN_FLAG;
+ 	  buf_track = -1;
+          if (biosdisk (BIOSDISK_WRITE, saved_drive, &buf_geom,
+			0, 1, SCRATCHSEG))
+	    {
+	      errnum = ERR_WRITE;
+	      return 0;
+	    }
+	}
+    }
+  
+  return 1;
+}
+
+int
+hide_partition (void)
+{
+  if (saved_drive)
+    {
+      int part = saved_partition >> 16;
+      
+      if (part > 3)
+        {
+          errnum = ERR_NO_PART;
+          return 0;
+        }
+      
+      if (! rawread (saved_drive, 0, 0, SECTOR_SIZE, (char *) SCRATCHADDR))
+        return 0;
+      
+      if (! (PC_SLICE_TYPE (SCRATCHADDR, part) & PC_SLICE_TYPE_HIDDEN_FLAG))
+        {
+          PC_SLICE_TYPE (SCRATCHADDR, part) |= PC_SLICE_TYPE_HIDDEN_FLAG;
+ 	  buf_track = -1;
+          if (biosdisk (BIOSDISK_WRITE, saved_drive, &buf_geom,
+			0, 1, SCRATCHSEG))
+	    {
+	      errnum = ERR_WRITE;
+	      return 0;
+	    }
+	}
+    }
+  
+  return 1;
+}
 
 static void
 check_and_print_mount (void)

stage2/fsys_fat.c

@@ -87,6 +87,7 @@ fat_create_blocklist (int first_fat_entry)
       BLK_BLKSTART (BLK_BLKLIST_START) = FAT_BPB_ROOT_DIR_START (BPB);
       fsmax = filemax = SECTOR_SIZE * (BLK_BLKLENGTH (BLK_BLKLIST_START)
 				       = FAT_BPB_ROOT_DIR_LENGTH (BPB));
+      return 1;
     }
   else
     /* any real directory/file */

stage2/fsys_minix.c

@@ -20,7 +20,7 @@
 /* Restrictions:
    This is MINIX V1 only (yet)
    Disk creation is like:
-   mkfs.minix  -c -n14 DEVICE 
+   mkfs.minix -c DEVICE 
 */
 
 #ifdef FSYS_MINIX
@@ -31,7 +31,7 @@
 /* #define DEBUG_MINIX */
 
 /* indirect blocks */
-static int mapblock1, mapblock2;
+static int mapblock1, mapblock2, namelen;
 
 /* sizes are always in bytes, BLOCK values are always in DEV_BSIZE (sectors) */
 #define DEV_BSIZE 512
@@ -80,8 +80,6 @@ typedef unsigned int __u32;
    here we have */
 #define INODE_VERSION(inode)	(SUPERBLOCK->s_version)
 
-#define MINIX_NAME_LEN		14 /* XXX depend on version */
-
 /*
  * This is the original minix inode layout on disk.
  * Note the 8-bit gid and atime and ctime.
@@ -162,19 +160,32 @@ struct minix_dir_entry {
 int
 minix_mount (void)
 {
-  int retval = 1;
+  if (((current_drive & 0x80 || current_slice != 0))
+      && (current_slice != PC_SLICE_TYPE_MINIX)
+      && ! IS_PC_SLICE_TYPE_BSD_WITH_FS (current_slice, FS_OTHER))
+    return 0;			/* The partition is not of MINIX type */
   
-  if ((((current_drive & 0x80 || current_slice != 0))
-       && (current_slice != PC_SLICE_TYPE_MINIX)
-       && ! IS_PC_SLICE_TYPE_BSD_WITH_FS (current_slice, FS_OTHER))
-      || part_length < (SBLOCK + 
-			(sizeof (struct minix_super_block) / DEV_BSIZE))
-      || ! devread (SBLOCK, 0, sizeof (struct minix_super_block),
-		    (char *) SUPERBLOCK)
-      || SUPERBLOCK->s_magic != MINIX_SUPER_MAGIC)
-    retval = 0;
+  if (part_length < (SBLOCK +
+		     (sizeof (struct minix_super_block) / DEV_BSIZE)))
+    return 0;			/* The partition is too short */
   
-  return retval;
+  if (!devread (SBLOCK, 0, sizeof (struct minix_super_block),
+		(char *) SUPERBLOCK))
+    return 0;			/* Cannot read superblock */
+  
+  switch (SUPERBLOCK->s_magic)
+    {
+    case MINIX_SUPER_MAGIC:
+      namelen = 14;
+      break;
+    case MINIX_SUPER_MAGIC2:
+      namelen = 30;
+      break;
+    default:
+      return 0;			/* Unsupported type */
+    }
+
+  return 1;
 }
 
 /* Takes a file system block number and reads it into BUFFER. */
@@ -482,9 +493,10 @@ minix_dir (char *dirname)
 	  off = loc & (BLOCK_SIZE - 1);
 	  dp = (struct minix_dir_entry *) (DATABLOCK2 + off);
 	  /* advance loc prematurely to next on-disk directory entry  */
-	  loc += sizeof (dp->inode) + 14; /* XXX */
+	  loc += sizeof (dp->inode) + namelen;
 
-	  /* NOTE: minix filenames are NULL terminated if < 14 else exact */
+	  /* NOTE: minix filenames are NULL terminated if < NAMELEN
+	     else exact */
 
 #ifdef DEBUG_MINIX
 	  printf ("directory entry ino=%d\n", dp->inode);
@@ -494,9 +506,9 @@ minix_dir (char *dirname)
 
 	  if (dp->inode)
 	    {
-	      int saved_c = dp->name[MINIX_NAME_LEN+1];
+	      int saved_c = dp->name[namelen + 1];
 
-	      dp->name[MINIX_NAME_LEN+1] = 0;
+	      dp->name[namelen+1] = 0;
 	      str_chk = substring (dirname, dp->name);
 
 # ifndef STAGE1_5
@@ -509,7 +521,7 @@ minix_dir (char *dirname)
 		}
 # endif
 
-	      dp->name[MINIX_NAME_LEN+1] = saved_c;
+	      dp->name[namelen + 1] = saved_c;
 	    }
 
 	}

stage2/pc_slice.h

@@ -133,6 +133,8 @@
 
 #define IS_PC_SLICE_TYPE_BSD(type)	IS_PC_SLICE_TYPE_BSD_WITH_FS(type,0)
 
+/* This is not a flag actually, but used as if it were a flag.  */
+#define PC_SLICE_TYPE_HIDDEN_FLAG	0x10
 
 /*
  *  *BSD-style disklabel & partition definitions.

stage2/shared.h

@@ -68,6 +68,12 @@ extern char *grub_scratch_mem;
 #define FSYS_BUFLEN  0x8000
 #define FSYS_BUF RAW_ADDR (0x68000)
 
+/* Command-line buffer for Multiboot kernels and modules. This area
+   includes the area into which Stage 1.5 and Stage 1 are loaded, but
+   that's no problem.  */
+#define MB_CMDLINE_BUF		RAW_ADDR (0x2000)
+#define MB_CMDLINE_BUFLEN	0x6000
+
 /*
  *  Linux setup parameters
  */
@@ -546,6 +552,12 @@ int open_partition (void);
 /* Sets device to the one represented by the SAVED_* parameters. */
 int make_saved_active (void);
 
+/* Hide a partition.  */
+int hide_partition (void);
+
+/* Unhide a partition. */
+int unhide_partition (void);
+
 /* Open a file or directory on the active device, using GRUB's
    internal filesystem support. */
 int grub_open (char *filename);
@@ -570,10 +582,10 @@ void print_completions (char *filename);
 /* Copies the current partition data to the desired address. */
 void copy_current_part_entry (char *buf);
 
-void bsd_boot (int type, int bootdev) __attribute__ ((noreturn));
-int load_image (void);
-int load_module (void);
-int load_initrd (void);
+void bsd_boot (int type, int bootdev, char *arg) __attribute__ ((noreturn));
+int load_image (char *kernel, char *arg);
+int load_module (char *module, char *arg);
+int load_initrd (char *initrd);
 
 void init_bios_info (void);