build process is cleaned up

stage2/filesys.h

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+/* filesys.h - abstract filesystem interface */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 1996  Erich Boleyn  <erich@uruk.org>
+ *  Copyright (C) 1999  Free Software Foundation, Inc.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "pc_slice.h"
+
+/*
+ *  Default to all functioning filesystems enabled
+ */
+
+#if !( defined(FSYS_FFS) || defined(FSYS_FAT) || defined(FSYS_EXT2FS) )
+#define FSYS_FFS
+#define FSYS_FAT
+#define FSYS_EXT2FS
+#endif
+
+#ifdef FSYS_FFS
+#define FSYS_FFS_NUM 1
+int ffs_mount (void);
+int ffs_read (char *buf, int len);
+int ffs_dir (char *dirname);
+#else
+#define FSYS_FFS_NUM 0
+#endif
+
+#ifdef FSYS_FAT
+#define FSYS_FAT_NUM 1
+int fat_mount (void);
+/* XX FAT filesystem uses block filesystem code for read! */
+int fat_dir (char *dirname);
+#ifdef NO_BLOCK_FILES
+#undef NO_BLOCK_FILES
+#endif /* NO_BLOCK_FILES */
+#else
+#define FSYS_FAT_NUM 0
+#endif
+
+#ifdef FSYS_EXT2FS
+#define FSYS_EXT2FS_NUM 1
+int ext2fs_mount (void);
+int ext2fs_read (char *buf, int len);
+int ext2fs_dir (char *dirname);
+#else
+#define FSYS_EXT2FS_NUM 0
+#endif
+
+#ifndef NUM_FSYS
+#define NUM_FSYS  ( FSYS_FFS_NUM + FSYS_FAT_NUM + FSYS_EXT2FS_NUM )
+#endif
+
+/* defines for the block filesystem info area */
+#ifndef NO_BLOCK_FILES
+#define BLK_CUR_FILEPOS      (*((int*)FSYS_BUF))
+#define BLK_CUR_BLKLIST      (*((int*)(FSYS_BUF+4)))
+#define BLK_CUR_BLKNUM       (*((int*)(FSYS_BUF+8)))
+#define BLK_MAX_ADDR         (FSYS_BUF+0x7FF9)
+#define BLK_BLKSTART(l)      (*((int*)l))
+#define BLK_BLKLENGTH(l)     (*((int*)(l+4)))
+#define BLK_BLKLIST_START    (FSYS_BUF+12)
+#define BLK_BLKLIST_INC_VAL  8
+#endif /* NO_BLOCK_FILES */
+
+/* this next part is pretty ugly, but it keeps it in one place! */
+
+struct fsys_entry
+  {
+    char *name;
+    int (*mount_func) (void);
+    int (*read_func) (char *buf, int len);
+    int (*dir_func) (char *dirname);
+  };
+
+#ifdef STAGE1_5
+# define print_possibilities 0
+#else
+extern int print_possibilities;
+#endif
+
+extern int fsmax;
+extern struct fsys_entry fsys_table[NUM_FSYS + 1];