(2006-08-06) rescue-bootcd

extra/syslinux-3.09/extlinux/.extlinux.o.d

@@ -0,0 +1 @@
+extlinux.o: extlinux.c ext2_fs.h ../version.h

extra/syslinux-3.09/extlinux/.extlinux_bss_bin.o.d

@@ -0,0 +1 @@
+extlinux_bss_bin.o: ../extlinux_bss_bin.c

extra/syslinux-3.09/extlinux/.extlinux_sys_bin.o.d

@@ -0,0 +1 @@
+extlinux_sys_bin.o: ../extlinux_sys_bin.c

extra/syslinux-3.09/extlinux/Makefile

@@ -0,0 +1,40 @@
+CC	 = gcc
+OPTFLAGS = -g -Os
+INCLUDES = -I. -I.. -I../libfat
+CFLAGS	 = -W -Wall -Wno-sign-compare -D_FILE_OFFSET_BITS=64 $(OPTFLAGS) $(INCLUDES)
+LDFLAGS	 = -s
+
+SRCS     = extlinux.c ../extlinux_bss_bin.c ../extlinux_sys_bin.c
+OBJS	 = $(patsubst %.c,%.o,$(notdir $(SRCS)))
+
+.SUFFIXES: .c .o .i .s .S
+
+VPATH = .:..
+
+all: installer
+
+tidy:
+	-rm -f *.o *.i *.s *.a .*.d
+
+clean: tidy
+	-rm -f extlinux
+
+spotless: clean
+	-rm -f *~
+
+installer: extlinux
+
+extlinux: $(OBJS)
+	$(CC) $(LDFLAGS) -o $@ $^
+
+%.o: %.c
+	$(CC) -Wp,-MT,$@,-MMD,.$@.d $(CFLAGS) -c -o $@ $<
+%.i: %.c
+	$(CC) $(CFLAGS) -E -o $@ $<
+%.s: %.c
+	$(CC) $(CFLAGS) -S -o $@ $<
+
+-include .*.d
+
+
+

extra/syslinux-3.09/extlinux/ext2_fs.h

@@ -0,0 +1,508 @@
+/*
+ *  linux/include/linux/ext2_fs.h
+ *
+ * Copyright (C) 1992, 1993, 1994, 1995
+ * Remy Card (card@masi.ibp.fr)
+ * Laboratoire MASI - Institut Blaise Pascal
+ * Universite Pierre et Marie Curie (Paris VI)
+ *
+ *  from
+ *
+ *  linux/include/linux/minix_fs.h
+ *
+ *  Copyright (C) 1991, 1992  Linus Torvalds
+ */
+
+/* Private copy for extlinux */
+
+#ifndef _LINUX_EXT2_FS_H
+#define _LINUX_EXT2_FS_H
+
+#include <linux/types.h>
+
+/*
+ * The second extended filesystem constants/structures
+ */
+
+/*
+ * Define EXT2FS_DEBUG to produce debug messages
+ */
+#undef EXT2FS_DEBUG
+
+/*
+ * Define EXT2_PREALLOCATE to preallocate data blocks for expanding files
+ */
+#define EXT2_PREALLOCATE
+#define EXT2_DEFAULT_PREALLOC_BLOCKS	8
+
+/*
+ * The second extended file system version
+ */
+#define EXT2FS_DATE		"95/08/09"
+#define EXT2FS_VERSION		"0.5b"
+
+/*
+ * Debug code
+ */
+#ifdef EXT2FS_DEBUG
+#	define ext2_debug(f, a...)	{ \
+					printk ("EXT2-fs DEBUG (%s, %d): %s:", \
+						__FILE__, __LINE__, __FUNCTION__); \
+				  	printk (f, ## a); \
+					}
+#else
+#	define ext2_debug(f, a...)	/**/
+#endif
+
+/*
+ * Special inode numbers
+ */
+#define	EXT2_BAD_INO		 1	/* Bad blocks inode */
+#define EXT2_ROOT_INO		 2	/* Root inode */
+#define EXT2_ACL_IDX_INO	 3	/* ACL inode */
+#define EXT2_ACL_DATA_INO	 4	/* ACL inode */
+#define EXT2_BOOT_LOADER_INO	 5	/* Boot loader inode */
+#define EXT2_UNDEL_DIR_INO	 6	/* Undelete directory inode */
+
+/* First non-reserved inode for old ext2 filesystems */
+#define EXT2_GOOD_OLD_FIRST_INO	11
+
+/*
+ * The second extended file system magic number
+ */
+#define EXT2_SUPER_MAGIC	0xEF53
+
+/*
+ * Maximal count of links to a file
+ */
+#define EXT2_LINK_MAX		32000
+
+/*
+ * Macro-instructions used to manage several block sizes
+ */
+#define EXT2_MIN_BLOCK_SIZE		1024
+#define	EXT2_MAX_BLOCK_SIZE		4096
+#define EXT2_MIN_BLOCK_LOG_SIZE		  10
+# define EXT2_BLOCK_SIZE(s)		(EXT2_MIN_BLOCK_SIZE << (s)->s_log_block_size)
+#define EXT2_ACLE_PER_BLOCK(s)		(EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_acl_entry))
+#define	EXT2_ADDR_PER_BLOCK(s)		(EXT2_BLOCK_SIZE(s) / sizeof (__u32))
+# define EXT2_BLOCK_SIZE_BITS(s)	((s)->s_log_block_size + 10)
+#define EXT2_INODE_SIZE(s)	(((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \
+				 EXT2_GOOD_OLD_INODE_SIZE : \
+				 (s)->s_inode_size)
+#define EXT2_FIRST_INO(s)	(((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \
+				 EXT2_GOOD_OLD_FIRST_INO : \
+				 (s)->s_first_ino)
+
+/*
+ * Macro-instructions used to manage fragments
+ */
+#define EXT2_MIN_FRAG_SIZE		1024
+#define	EXT2_MAX_FRAG_SIZE		4096
+#define EXT2_MIN_FRAG_LOG_SIZE		  10
+# define EXT2_FRAG_SIZE(s)		(EXT2_MIN_FRAG_SIZE << (s)->s_log_frag_size)
+# define EXT2_FRAGS_PER_BLOCK(s)	(EXT2_BLOCK_SIZE(s) / EXT2_FRAG_SIZE(s))
+
+/*
+ * ACL structures
+ */
+struct ext2_acl_header	/* Header of Access Control Lists */
+{
+	__u32	aclh_size;
+	__u32	aclh_file_count;
+	__u32	aclh_acle_count;
+	__u32	aclh_first_acle;
+};
+
+struct ext2_acl_entry	/* Access Control List Entry */
+{
+	__u32	acle_size;
+	__u16	acle_perms;	/* Access permissions */
+	__u16	acle_type;	/* Type of entry */
+	__u16	acle_tag;	/* User or group identity */
+	__u16	acle_pad1;
+	__u32	acle_next;	/* Pointer on next entry for the */
+					/* same inode or on next free entry */
+};
+
+/*
+ * Structure of a blocks group descriptor
+ */
+struct ext2_group_desc
+{
+	__u32	bg_block_bitmap;		/* Blocks bitmap block */
+	__u32	bg_inode_bitmap;		/* Inodes bitmap block */
+	__u32	bg_inode_table;		/* Inodes table block */
+	__u16	bg_free_blocks_count;	/* Free blocks count */
+	__u16	bg_free_inodes_count;	/* Free inodes count */
+	__u16	bg_used_dirs_count;	/* Directories count */
+	__u16	bg_pad;
+	__u32	bg_reserved[3];
+};
+
+/*
+ * Macro-instructions used to manage group descriptors
+ */
+# define EXT2_BLOCKS_PER_GROUP(s)	((s)->s_blocks_per_group)
+# define EXT2_DESC_PER_BLOCK(s)		(EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_group_desc))
+# define EXT2_INODES_PER_GROUP(s)	((s)->s_inodes_per_group)
+
+/*
+ * Constants relative to the data blocks
+ */
+#define	EXT2_NDIR_BLOCKS		12
+#define	EXT2_IND_BLOCK			EXT2_NDIR_BLOCKS
+#define	EXT2_DIND_BLOCK			(EXT2_IND_BLOCK + 1)
+#define	EXT2_TIND_BLOCK			(EXT2_DIND_BLOCK + 1)
+#define	EXT2_N_BLOCKS			(EXT2_TIND_BLOCK + 1)
+
+/*
+ * Inode flags
+ */
+#define	EXT2_SECRM_FL			0x00000001 /* Secure deletion */
+#define	EXT2_UNRM_FL			0x00000002 /* Undelete */
+#define	EXT2_COMPR_FL			0x00000004 /* Compress file */
+#define EXT2_SYNC_FL			0x00000008 /* Synchronous updates */
+#define EXT2_IMMUTABLE_FL		0x00000010 /* Immutable file */
+#define EXT2_APPEND_FL			0x00000020 /* writes to file may only append */
+#define EXT2_NODUMP_FL			0x00000040 /* do not dump file */
+#define EXT2_NOATIME_FL			0x00000080 /* do not update atime */
+/* Reserved for compression usage... */
+#define EXT2_DIRTY_FL			0x00000100
+#define EXT2_COMPRBLK_FL		0x00000200 /* One or more compressed clusters */
+#define EXT2_NOCOMP_FL			0x00000400 /* Don't compress */
+#define EXT2_ECOMPR_FL			0x00000800 /* Compression error */
+/* End compression flags --- maybe not all used */	
+#define EXT2_BTREE_FL			0x00001000 /* btree format dir */
+#define EXT2_RESERVED_FL		0x80000000 /* reserved for ext2 lib */
+
+#define EXT2_FL_USER_VISIBLE		0x00001FFF /* User visible flags */
+#define EXT2_FL_USER_MODIFIABLE		0x000000FF /* User modifiable flags */
+
+/*
+ * ioctl commands
+ */
+#define	EXT2_IOC_GETFLAGS		_IOR('f', 1, long)
+#define	EXT2_IOC_SETFLAGS		_IOW('f', 2, long)
+#define	EXT2_IOC_GETVERSION		_IOR('v', 1, long)
+#define	EXT2_IOC_SETVERSION		_IOW('v', 2, long)
+
+/*
+ * Structure of an inode on the disk
+ */
+struct ext2_inode {
+	__u16	i_mode;		/* File mode */
+	__u16	i_uid;		/* Low 16 bits of Owner Uid */
+	__u32	i_size;		/* Size in bytes */
+	__u32	i_atime;	/* Access time */
+	__u32	i_ctime;	/* Creation time */
+	__u32	i_mtime;	/* Modification time */
+	__u32	i_dtime;	/* Deletion Time */
+	__u16	i_gid;		/* Low 16 bits of Group Id */
+	__u16	i_links_count;	/* Links count */
+	__u32	i_blocks;	/* Blocks count */
+	__u32	i_flags;	/* File flags */
+	union {
+		struct {
+			__u32  l_i_reserved1;
+		} linux1;
+		struct {
+			__u32  h_i_translator;
+		} hurd1;
+		struct {
+			__u32  m_i_reserved1;
+		} masix1;
+	} osd1;				/* OS dependent 1 */
+	__u32	i_block[EXT2_N_BLOCKS];/* Pointers to blocks */
+	__u32	i_generation;	/* File version (for NFS) */
+	__u32	i_file_acl;	/* File ACL */
+	__u32	i_dir_acl;	/* Directory ACL */
+	__u32	i_faddr;	/* Fragment address */
+	union {
+		struct {
+			__u8	l_i_frag;	/* Fragment number */
+			__u8	l_i_fsize;	/* Fragment size */
+			__u16	i_pad1;
+			__u16	l_i_uid_high;	/* these 2 fields    */
+			__u16	l_i_gid_high;	/* were reserved2[0] */
+			__u32	l_i_reserved2;
+		} linux2;
+		struct {
+			__u8	h_i_frag;	/* Fragment number */
+			__u8	h_i_fsize;	/* Fragment size */
+			__u16	h_i_mode_high;
+			__u16	h_i_uid_high;
+			__u16	h_i_gid_high;
+			__u32	h_i_author;
+		} hurd2;
+		struct {
+			__u8	m_i_frag;	/* Fragment number */
+			__u8	m_i_fsize;	/* Fragment size */
+			__u16	m_pad1;
+			__u32	m_i_reserved2[2];
+		} masix2;
+	} osd2;				/* OS dependent 2 */
+};
+
+#define i_size_high	i_dir_acl
+
+#if defined(__KERNEL__) || defined(__linux__)
+#define i_reserved1	osd1.linux1.l_i_reserved1
+#define i_frag		osd2.linux2.l_i_frag
+#define i_fsize		osd2.linux2.l_i_fsize
+#define i_uid_low	i_uid
+#define i_gid_low	i_gid
+#define i_uid_high	osd2.linux2.l_i_uid_high
+#define i_gid_high	osd2.linux2.l_i_gid_high
+#define i_reserved2	osd2.linux2.l_i_reserved2
+#endif
+
+#ifdef	__hurd__
+#define i_translator	osd1.hurd1.h_i_translator
+#define i_frag		osd2.hurd2.h_i_frag;
+#define i_fsize		osd2.hurd2.h_i_fsize;
+#define i_uid_high	osd2.hurd2.h_i_uid_high
+#define i_gid_high	osd2.hurd2.h_i_gid_high
+#define i_author	osd2.hurd2.h_i_author
+#endif
+
+#ifdef	__masix__
+#define i_reserved1	osd1.masix1.m_i_reserved1
+#define i_frag		osd2.masix2.m_i_frag
+#define i_fsize		osd2.masix2.m_i_fsize
+#define i_reserved2	osd2.masix2.m_i_reserved2
+#endif
+
+/*
+ * File system states
+ */
+#define	EXT2_VALID_FS			0x0001	/* Unmounted cleanly */
+#define	EXT2_ERROR_FS			0x0002	/* Errors detected */
+
+/*
+ * Mount flags
+ */
+#define EXT2_MOUNT_CHECK		0x0001	/* Do mount-time checks */
+#define EXT2_MOUNT_GRPID		0x0004	/* Create files with directory's group */
+#define EXT2_MOUNT_DEBUG		0x0008	/* Some debugging messages */
+#define EXT2_MOUNT_ERRORS_CONT		0x0010	/* Continue on errors */
+#define EXT2_MOUNT_ERRORS_RO		0x0020	/* Remount fs ro on errors */
+#define EXT2_MOUNT_ERRORS_PANIC		0x0040	/* Panic on errors */
+#define EXT2_MOUNT_MINIX_DF		0x0080	/* Mimics the Minix statfs */
+#define EXT2_MOUNT_NO_UID32		0x0200  /* Disable 32-bit UIDs */
+
+#define clear_opt(o, opt)		o &= ~EXT2_MOUNT_##opt
+#define set_opt(o, opt)			o |= EXT2_MOUNT_##opt
+#define test_opt(sb, opt)		((sb)->u.ext2_sb.s_mount_opt & \
+					 EXT2_MOUNT_##opt)
+/*
+ * Maximal mount counts between two filesystem checks
+ */
+#define EXT2_DFL_MAX_MNT_COUNT		20	/* Allow 20 mounts */
+#define EXT2_DFL_CHECKINTERVAL		0	/* Don't use interval check */
+
+/*
+ * Behaviour when detecting errors
+ */
+#define EXT2_ERRORS_CONTINUE		1	/* Continue execution */
+#define EXT2_ERRORS_RO			2	/* Remount fs read-only */
+#define EXT2_ERRORS_PANIC		3	/* Panic */
+#define EXT2_ERRORS_DEFAULT		EXT2_ERRORS_CONTINUE
+
+/*
+ * Structure of the super block
+ */
+struct ext2_super_block {
+	__u32	s_inodes_count;		/* Inodes count */
+	__u32	s_blocks_count;		/* Blocks count */
+	__u32	s_r_blocks_count;	/* Reserved blocks count */
+	__u32	s_free_blocks_count;	/* Free blocks count */
+	__u32	s_free_inodes_count;	/* Free inodes count */
+	__u32	s_first_data_block;	/* First Data Block */
+	__u32	s_log_block_size;	/* Block size */
+	__s32	s_log_frag_size;	/* Fragment size */
+	__u32	s_blocks_per_group;	/* # Blocks per group */
+	__u32	s_frags_per_group;	/* # Fragments per group */
+	__u32	s_inodes_per_group;	/* # Inodes per group */
+	__u32	s_mtime;		/* Mount time */
+	__u32	s_wtime;		/* Write time */
+	__u16	s_mnt_count;		/* Mount count */
+	__s16	s_max_mnt_count;	/* Maximal mount count */
+	__u16	s_magic;		/* Magic signature */
+	__u16	s_state;		/* File system state */
+	__u16	s_errors;		/* Behaviour when detecting errors */
+	__u16	s_minor_rev_level; 	/* minor revision level */
+	__u32	s_lastcheck;		/* time of last check */
+	__u32	s_checkinterval;	/* max. time between checks */
+	__u32	s_creator_os;		/* OS */
+	__u32	s_rev_level;		/* Revision level */
+	__u16	s_def_resuid;		/* Default uid for reserved blocks */
+	__u16	s_def_resgid;		/* Default gid for reserved blocks */
+	/*
+	 * These fields are for EXT2_DYNAMIC_REV superblocks only.
+	 *
+	 * Note: the difference between the compatible feature set and
+	 * the incompatible feature set is that if there is a bit set
+	 * in the incompatible feature set that the kernel doesn't
+	 * know about, it should refuse to mount the filesystem.
+	 * 
+	 * e2fsck's requirements are more strict; if it doesn't know
+	 * about a feature in either the compatible or incompatible
+	 * feature set, it must abort and not try to meddle with
+	 * things it doesn't understand...
+	 */
+	__u32	s_first_ino; 		/* First non-reserved inode */
+	__u16   s_inode_size; 		/* size of inode structure */
+	__u16	s_block_group_nr; 	/* block group # of this superblock */
+	__u32	s_feature_compat; 	/* compatible feature set */
+	__u32	s_feature_incompat; 	/* incompatible feature set */
+	__u32	s_feature_ro_compat; 	/* readonly-compatible feature set */
+	__u8	s_uuid[16];		/* 128-bit uuid for volume */
+	char	s_volume_name[16]; 	/* volume name */
+	char	s_last_mounted[64]; 	/* directory where last mounted */
+	__u32	s_algorithm_usage_bitmap; /* For compression */
+	/*
+	 * Performance hints.  Directory preallocation should only
+	 * happen if the EXT2_COMPAT_PREALLOC flag is on.
+	 */
+	__u8	s_prealloc_blocks;	/* Nr of blocks to try to preallocate*/
+	__u8	s_prealloc_dir_blocks;	/* Nr to preallocate for dirs */
+	__u16	s_padding1;
+	__u32	s_reserved[204];	/* Padding to the end of the block */
+};
+
+/* Assume that user mode programs are passing in an ext2fs superblock, not
+ * a kernel struct super_block.  This will allow us to call the feature-test
+ * macros from user land. */
+#define EXT2_SB(sb)	(sb)
+
+/*
+ * Codes for operating systems
+ */
+#define EXT2_OS_LINUX		0
+#define EXT2_OS_HURD		1
+#define EXT2_OS_MASIX		2
+#define EXT2_OS_FREEBSD		3
+#define EXT2_OS_LITES		4
+
+/*
+ * Revision levels
+ */
+#define EXT2_GOOD_OLD_REV	0	/* The good old (original) format */
+#define EXT2_DYNAMIC_REV	1 	/* V2 format w/ dynamic inode sizes */
+
+#define EXT2_CURRENT_REV	EXT2_GOOD_OLD_REV
+#define EXT2_MAX_SUPP_REV	EXT2_DYNAMIC_REV
+
+#define EXT2_GOOD_OLD_INODE_SIZE 128
+
+/*
+ * Feature set definitions
+ */
+
+#define EXT2_HAS_COMPAT_FEATURE(sb,mask)			\
+	( EXT2_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) )
+#define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask)			\
+	( EXT2_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) )
+#define EXT2_HAS_INCOMPAT_FEATURE(sb,mask)			\
+	( EXT2_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) )
+#define EXT2_SET_COMPAT_FEATURE(sb,mask)			\
+	EXT2_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
+#define EXT2_SET_RO_COMPAT_FEATURE(sb,mask)			\
+	EXT2_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask)
+#define EXT2_SET_INCOMPAT_FEATURE(sb,mask)			\
+	EXT2_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask)
+#define EXT2_CLEAR_COMPAT_FEATURE(sb,mask)			\
+	EXT2_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask)
+#define EXT2_CLEAR_RO_COMPAT_FEATURE(sb,mask)			\
+	EXT2_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask)
+#define EXT2_CLEAR_INCOMPAT_FEATURE(sb,mask)			\
+	EXT2_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask)
+
+#define EXT2_FEATURE_COMPAT_DIR_PREALLOC	0x0001
+#define EXT2_FEATURE_COMPAT_IMAGIC_INODES	0x0002
+#define EXT3_FEATURE_COMPAT_HAS_JOURNAL		0x0004
+#define EXT2_FEATURE_COMPAT_EXT_ATTR		0x0008
+#define EXT2_FEATURE_COMPAT_RESIZE_INO		0x0010
+#define EXT2_FEATURE_COMPAT_DIR_INDEX		0x0020
+#define EXT2_FEATURE_COMPAT_ANY			0xffffffff
+
+#define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER	0x0001
+#define EXT2_FEATURE_RO_COMPAT_LARGE_FILE	0x0002
+#define EXT2_FEATURE_RO_COMPAT_BTREE_DIR	0x0004
+#define EXT2_FEATURE_RO_COMPAT_ANY		0xffffffff
+
+#define EXT2_FEATURE_INCOMPAT_COMPRESSION	0x0001
+#define EXT2_FEATURE_INCOMPAT_FILETYPE		0x0002
+#define EXT3_FEATURE_INCOMPAT_RECOVER		0x0004
+#define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV	0x0008
+#define EXT2_FEATURE_INCOMPAT_ANY		0xffffffff
+
+#define EXT2_FEATURE_COMPAT_SUPP	0
+#define EXT2_FEATURE_INCOMPAT_SUPP	EXT2_FEATURE_INCOMPAT_FILETYPE
+#define EXT2_FEATURE_RO_COMPAT_SUPP	(EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \
+					 EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
+					 EXT2_FEATURE_RO_COMPAT_BTREE_DIR)
+#define EXT2_FEATURE_RO_COMPAT_UNSUPPORTED	~EXT2_FEATURE_RO_COMPAT_SUPP
+#define EXT2_FEATURE_INCOMPAT_UNSUPPORTED	~EXT2_FEATURE_INCOMPAT_SUPP
+
+/*
+ * Default values for user and/or group using reserved blocks
+ */
+#define	EXT2_DEF_RESUID		0
+#define	EXT2_DEF_RESGID		0
+
+/*
+ * Structure of a directory entry
+ */
+#define EXT2_NAME_LEN 255
+
+struct ext2_dir_entry {
+	__u32	inode;			/* Inode number */
+	__u16	rec_len;		/* Directory entry length */
+	__u16	name_len;		/* Name length */
+	char	name[EXT2_NAME_LEN];	/* File name */
+};
+
+/*
+ * The new version of the directory entry.  Since EXT2 structures are
+ * stored in intel byte order, and the name_len field could never be
+ * bigger than 255 chars, it's safe to reclaim the extra byte for the
+ * file_type field.
+ */
+struct ext2_dir_entry_2 {
+	__u32	inode;			/* Inode number */
+	__u16	rec_len;		/* Directory entry length */
+	__u8	name_len;		/* Name length */
+	__u8	file_type;
+	char	name[EXT2_NAME_LEN];	/* File name */
+};
+
+/*
+ * Ext2 directory file types.  Only the low 3 bits are used.  The
+ * other bits are reserved for now.
+ */
+enum {
+	EXT2_FT_UNKNOWN,
+	EXT2_FT_REG_FILE,
+	EXT2_FT_DIR,
+	EXT2_FT_CHRDEV,
+	EXT2_FT_BLKDEV,
+	EXT2_FT_FIFO,
+	EXT2_FT_SOCK,
+	EXT2_FT_SYMLINK,
+	EXT2_FT_MAX
+};
+
+/*
+ * EXT2_DIR_PAD defines the directory entries boundaries
+ *
+ * NOTE: It must be a multiple of 4
+ */
+#define EXT2_DIR_PAD		 	4
+#define EXT2_DIR_ROUND 			(EXT2_DIR_PAD - 1)
+#define EXT2_DIR_REC_LEN(name_len)	(((name_len) + 8 + EXT2_DIR_ROUND) & \
+					 ~EXT2_DIR_ROUND)
+
+
+#endif	/* _LINUX_EXT2_FS_H */

extra/syslinux-3.09/extlinux/extlinux.c

@@ -0,0 +1,756 @@
+#ident "$Id: extlinux.c,v 1.15 2005/04/03 00:00:36 hpa Exp $"
+/* ----------------------------------------------------------------------- *
+ *   
+ *   Copyright 1998-2005 H. Peter Anvin - All Rights Reserved
+ *
+ *   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, Inc., 53 Temple Place Ste 330,
+ *   Boston MA 02111-1307, USA; either version 2 of the License, or
+ *   (at your option) any later version; incorporated herein by reference.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * extlinux.c
+ *
+ * Install the extlinux boot block on an ext2/3 filesystem
+ */
+
+#define  _GNU_SOURCE		/* Enable everything */
+#include <inttypes.h>
+/* This is needed to deal with the kernel headers imported into glibc 3.3.3. */
+typedef uint64_t u64;
+#include <alloca.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <mntent.h>
+#include <stdlib.h>
+#include <string.h>
+#include <getopt.h>
+#include <sysexits.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/mount.h>
+
+#include <linux/fd.h>		/* Floppy geometry */
+#include <linux/hdreg.h>	/* Hard disk geometry */
+#include <linux/fs.h>		/* FIGETBSZ, FIBMAP */
+
+#include "ext2_fs.h"
+#include "../version.h"
+
+#ifdef DEBUG
+# define dprintf printf
+#else
+# define dprintf(...) ((void)0)
+#endif
+
+/* Global option handling */
+
+const char *program;
+
+/* These are the options we can set and their values */
+struct my_options {
+  unsigned int sectors;
+  unsigned int heads;
+} opt = {
+  .sectors = 0,
+  .heads = 0,
+};
+
+static void __attribute__((noreturn)) usage(int rv)
+{
+  fprintf(stderr,
+	  "Usage: %s [options] directory\n"
+	  "  --zip        -z  Force zipdrive geometry (-H 64 -S 32)\n"
+	  "  --sectors=#  -S  Force the number of sectors per track\n"
+	  "  --heads=#    -H  Force number of heads\n"
+	  "\n"
+	  "  Note: geometry is determined at boot time for devices which\n"
+	  "  are considered hard disks by the BIOS.  Unfortunately, this is\n"
+	  "  not possible for devices which are considered floppy disks,\n"
+	  "  which includes zipdisks and LS-120 superfloppies.\n"
+	  "\n"
+	  "  The -z option is useful for USB devices which are considered\n"
+	  "  hard disks by some BIOSes and zipdrives by other BIOSes.\n",
+	  program);
+
+  exit(rv);
+}
+
+static const struct option long_options[] = {
+  { "zipdrive", 0, NULL, 'z' },
+  { "sectors",  1, NULL, 'S' },
+  { "heads",    1, NULL, 'H' },
+  { "version",  0, NULL, 'v' },
+  { "help",     0, NULL, 'h' },
+  { 0, 0, 0, 0 }
+};
+    
+static const char short_options[] = "zS:H:vh";
+
+
+
+#if defined(__linux__) && !defined(BLKGETSIZE64)
+/* This takes a u64, but the size field says size_t.  Someone screwed big. */
+# define BLKGETSIZE64 _IOR(0x12,114,size_t)
+#endif
+
+#define LDLINUX_MAGIC	0x3eb202fe
+
+enum bs_offsets {
+  bsJump            = 0x00,
+  bsOemName         = 0x03,
+  bsBytesPerSec     = 0x0b,
+  bsSecPerClust     = 0x0d,
+  bsResSectors      = 0x0e,
+  bsFATs            = 0x10,
+  bsRootDirEnts     = 0x11,
+  bsSectors         = 0x13,
+  bsMedia           = 0x15,
+  bsFATsecs         = 0x16,
+  bsSecPerTrack     = 0x18,
+  bsHeads           = 0x1a,
+  bsHiddenSecs      = 0x1c,
+  bsHugeSectors     = 0x20,
+
+  /* FAT12/16 only */
+  bs16DriveNumber   = 0x24,
+  bs16Reserved1     = 0x25,
+  bs16BootSignature = 0x26,
+  bs16VolumeID      = 0x27,
+  bs16VolumeLabel   = 0x2b,
+  bs16FileSysType   = 0x36,
+  bs16Code          = 0x3e,
+
+  /* FAT32 only */
+  bs32FATSz32       = 36,
+  bs32ExtFlags      = 40,
+  bs32FSVer         = 42,
+  bs32RootClus      = 44,
+  bs32FSInfo        = 48,
+  bs32BkBootSec     = 50,
+  bs32Reserved      = 52,
+  bs32DriveNumber   = 64,
+  bs32Reserved1     = 65,
+  bs32BootSignature = 66,
+  bs32VolumeID      = 67,
+  bs32VolumeLabel   = 71,
+  bs32FileSysType   = 82,
+  bs32Code          = 90,
+  
+  bsSignature     = 0x1fe
+};
+
+#define bsHead      bsJump
+#define bsHeadLen   (bsOemName-bsHead)
+#define bsCode	    bs32Code	/* The common safe choice */
+#define bsCodeLen   (bsSignature-bs32Code)
+
+/*
+ * Access functions for littleendian numbers, possibly misaligned.
+ */
+static inline uint8_t get_8(const unsigned char *p)
+{
+  return *(const uint8_t *)p;
+}
+
+static inline uint16_t get_16(const unsigned char *p)
+{
+#if defined(__i386__) || defined(__x86_64__)
+  /* Littleendian and unaligned-capable */
+  return *(const uint16_t *)p;
+#else
+  return (uint16_t)p[0] + ((uint16_t)p[1] << 8);
+#endif
+}
+
+static inline uint32_t get_32(const unsigned char *p)
+{
+#if defined(__i386__) || defined(__x86_64__)
+  /* Littleendian and unaligned-capable */
+  return *(const uint32_t *)p;
+#else
+  return (uint32_t)p[0] + ((uint32_t)p[1] << 8) +
+    ((uint32_t)p[2] << 16) + ((uint32_t)p[3] << 24);
+#endif
+}
+
+static inline void set_16(unsigned char *p, uint16_t v)
+{
+#if defined(__i386__) || defined(__x86_64__)
+  /* Littleendian and unaligned-capable */
+  *(uint16_t *)p = v;
+#else
+  p[0] = (v & 0xff);
+  p[1] = ((v >> 8) & 0xff);
+#endif
+}
+
+static inline void set_32(unsigned char *p, uint32_t v)
+{
+#if defined(__i386__) || defined(__x86_64__)
+  /* Littleendian and unaligned-capable */
+  *(uint32_t *)p = v;
+#else
+  p[0] = (v & 0xff);
+  p[1] = ((v >> 8) & 0xff);
+  p[2] = ((v >> 16) & 0xff);
+  p[3] = ((v >> 24) & 0xff);
+#endif
+}
+
+#ifndef EXT2_SUPER_OFFSET
+#define EXT2_SUPER_OFFSET 1024
+#endif
+
+#define SECTOR_SHIFT	9	/* 512-byte sectors */
+#define SECTOR_SIZE	(1 << SECTOR_SHIFT)
+
+const char *program;
+
+/*
+ * Boot block
+ */
+extern unsigned char extlinux_bootsect[];
+extern unsigned int  extlinux_bootsect_len;
+#define boot_block	extlinux_bootsect
+#define boot_block_len  extlinux_bootsect_len
+
+/*
+ * Image file
+ */
+extern unsigned char extlinux_image[];
+extern unsigned int  extlinux_image_len;
+#define boot_image	extlinux_image
+#define boot_image_len  extlinux_image_len
+
+/*
+ * Common abort function
+ */
+void __attribute__((noreturn)) die(const char *msg)
+{
+  fputs(msg, stderr);
+  exit(1);
+}
+
+/*
+ * read/write wrapper functions
+ */
+ssize_t xpread(int fd, void *buf, size_t count, off_t offset)
+{
+  char *bufp = (char *)buf;
+  ssize_t rv;
+  ssize_t done = 0;
+
+  while ( count ) {
+    rv = pread(fd, bufp, count, offset);
+    if ( rv == 0 ) {
+      die("short read");
+    } else if ( rv == -1 ) {
+      if ( errno == EINTR ) {
+	continue;
+      } else {
+	die(strerror(errno));
+      }
+    } else {
+      bufp += rv;
+      offset += rv;
+      done += rv;
+      count -= rv;
+    }
+  }
+
+  return done;
+}
+
+ssize_t xpwrite(int fd, const void *buf, size_t count, off_t offset)
+{
+  const char *bufp = (const char *)buf;
+  ssize_t rv;
+  ssize_t done = 0;
+
+  while ( count ) {
+    rv = pwrite(fd, bufp, count, offset);
+    if ( rv == 0 ) {
+      die("short write");
+    } else if ( rv == -1 ) {
+      if ( errno == EINTR ) {
+	continue;
+      } else {
+	die(strerror(errno));
+      }
+    } else {
+      bufp += rv;
+      offset += rv;
+      done += rv;
+      count -= rv;
+    }
+  }
+
+  return done;
+}
+
+/*
+ * Produce file map
+ */
+int
+sectmap(int fd, uint32_t *sectors, int nsectors)
+{
+  unsigned int blksize, blk, nblk;
+  unsigned int i;
+
+  /* Get block size */
+  if ( ioctl(fd, FIGETBSZ, &blksize) )
+    return -1;
+
+  /* Number of sectors per block */
+  blksize >>= SECTOR_SHIFT;
+
+  nblk = 0;
+  while ( nsectors ) {
+    
+    blk = nblk++;
+    dprintf("querying block %u\n", blk);
+    if ( ioctl(fd, FIBMAP, &blk) )
+      return -1;
+
+    blk *= blksize;
+    for ( i = 0 ; i < blksize ; i++ ) {
+      if ( !nsectors )
+	return 0;
+
+      dprintf("Sector: %10u\n", blk);
+      *sectors++ = blk++;
+      nsectors--;
+    }
+  }
+
+  return 0;
+}
+
+/*
+ * Get the size of a block device
+ */
+uint64_t get_size(int devfd)
+{
+  uint64_t bytes;
+  uint32_t sects;
+  struct stat st;
+
+#ifdef BLKGETSIZE64
+  if ( !ioctl(devfd, BLKGETSIZE64, &bytes) )
+    return bytes;
+#endif
+  if ( !ioctl(devfd, BLKGETSIZE, &sects) )
+    return (uint64_t)sects << 9;
+  else if ( !fstat(devfd, &st) && st.st_size )
+    return st.st_size;
+  else
+    return 0;
+}
+
+
+/*
+ * Get device geometry and partition offset
+ */
+struct geometry_table {
+  uint64_t bytes;
+  struct hd_geometry g;
+};
+
+/* Standard floppy disk geometries, plus LS-120.  Zipdisk geometry
+   (x/64/32) is the final fallback.  I don't know what LS-240 has
+   as its geometry, since I don't have one and don't know anyone that does,
+   and Google wasn't helpful... */
+static const struct geometry_table standard_geometries[] = {
+  {    360*1024, {  2,  9,  40, 0 } },
+  {    720*1024, {  2,  9,  80, 0 } },
+  {   1200*1024, {  2, 15,  80, 0 } },
+  {   1440*1024, {  2, 18,  80, 0 } },
+  {   1680*1024, {  2, 21,  80, 0 } },
+  {   1722*1024, {  2, 21,  80, 0 } },
+  {   2880*1024, {  2, 36,  80, 0 } },
+  {   3840*1024, {  2, 48,  80, 0 } },
+  { 123264*1024, {  8, 32, 963, 0 } }, /* LS120 */
+  { 0, {0,0,0,0} }
+};
+
+int
+get_geometry(int devfd, uint64_t totalbytes, struct hd_geometry *geo)
+{
+  struct floppy_struct fd_str;
+  const struct geometry_table *gp;
+
+  memset(geo, 0, sizeof *geo);
+
+  if ( !ioctl(devfd, HDIO_GETGEO, &geo) ) {
+    return 0;
+  } else if ( !ioctl(devfd, FDGETPRM, &fd_str) ) {
+    geo->heads     = fd_str.head;
+    geo->sectors   = fd_str.sect;
+    geo->cylinders = fd_str.track;
+    geo->start     = 0;
+    return 0;
+  } 
+
+  /* Didn't work.  Let's see if this is one of the standard geometries */
+  for ( gp = standard_geometries ; gp->bytes ; gp++ ) {
+    if ( gp->bytes == totalbytes ) {
+      memcpy(geo, &gp->g, sizeof *geo);
+      return 0;
+    }
+  }
+
+  /* Didn't work either... assign a geometry of 64 heads, 32 sectors; this is
+     what zipdisks use, so this would help if someone has a USB key that
+     they're booting in USB-ZIP mode. */
+
+  geo->heads     = opt.heads ?: 64;
+  geo->sectors   = opt.sectors ?: 32;
+  geo->cylinders = totalbytes/(geo->heads*geo->sectors << SECTOR_SHIFT);
+  geo->start     = 0;
+
+  if ( !opt.sectors && !opt.heads )
+    fprintf(stderr, "Warning: unable to obtain device geometry (defaulting to %d heads, %d sectors)\n"
+	    "         (on hard disks, this is usually harmless.)\n",
+	    geo->heads, geo->sectors);
+
+  return 1;
+}
+
+/*
+ * Query the device geometry and put it into the boot sector.
+ * Map the file and put the map in the boot sector and file.
+ * Stick the "current directory" inode number into the file.
+ */
+void
+patch_file_and_bootblock(int fd, int dirfd, int devfd)
+{
+  struct stat dirst;
+  struct hd_geometry geo;
+  uint32_t *sectp;
+  uint64_t totalbytes, totalsectors;
+  int nsect;
+  unsigned char *p, *patcharea;
+  int i, dw;
+  uint32_t csum;
+
+  if ( fstat(dirfd, &dirst) ) {
+    perror("fstat dirfd");
+    exit(255);			/* This should never happen */
+  }
+
+  totalbytes = get_size(devfd);
+  get_geometry(devfd, totalbytes, &geo);
+
+  if ( opt.heads )
+    geo.heads = opt.heads;
+  if ( opt.sectors )
+    geo.sectors = opt.sectors;
+
+  /* Patch this into a fake FAT superblock.  This isn't because
+     FAT is a good format in any way, it's because it lets the
+     early bootstrap share code with the FAT version. */
+  dprintf("heads = %u, sect = %u\n", geo.heads, geo.sectors);
+
+  totalsectors = totalbytes >> SECTOR_SHIFT;
+  if ( totalsectors >= 65536 ) {
+    set_16(boot_block+bsSectors, 0);
+  } else {
+    set_16(boot_block+bsSectors, totalsectors);
+  }
+  set_32(boot_block+bsHugeSectors, totalsectors);
+
+  set_16(boot_block+bsBytesPerSec, SECTOR_SIZE);
+  set_16(boot_block+bsSecPerTrack, geo.sectors);
+  set_16(boot_block+bsHeads, geo.heads);
+  set_32(boot_block+bsHiddenSecs, geo.start);
+
+  /* Construct the boot file */
+
+  dprintf("directory inode = %lu\n", (unsigned long) dirst.st_ino);
+  nsect = (boot_image_len+SECTOR_SIZE-1) >> SECTOR_SHIFT;
+  sectp = alloca(sizeof(uint32_t)*nsect);
+  if ( sectmap(fd, sectp, nsect) ) {
+    perror("bmap");
+    exit(1);
+  }
+
+  /* First sector need pointer in boot sector */
+  set_32(boot_block+0x1F8, *sectp++);
+  nsect--;
+  
+  /* Search for LDLINUX_MAGIC to find the patch area */
+  for ( p = boot_image ; get_32(p) != LDLINUX_MAGIC ; p += 4 );
+  patcharea = p+8;
+  
+  /* Set up the totals */
+  dw = boot_image_len >> 2; /* COMPLETE dwords! */
+  set_16(patcharea, dw);
+  set_16(patcharea+2, nsect);	/* Does not include the first sector! */
+  set_32(patcharea+8, dirst.st_ino); /* "Current" directory */
+  
+  /* Set the sector pointers */
+  p = patcharea+12;
+  
+  memset(p, 0, 64*4);
+  while ( nsect-- ) {
+    set_32(p, *sectp++);
+    p += 4;
+  }
+  
+  /* Now produce a checksum */
+  set_32(patcharea+4, 0);
+
+  csum = LDLINUX_MAGIC;
+  for ( i = 0, p = boot_image ; i < dw ; i++, p += 4 )
+    csum -= get_32(p);		/* Negative checksum */
+  
+  set_32(patcharea+4, csum);
+}
+
+/*
+ * Install the boot block on the specified device.
+ * Must be run AFTER install_file()!
+ */
+int
+install_bootblock(int fd, const char *device)
+{
+  struct ext2_super_block sb;
+
+  if ( xpread(fd, &sb, sizeof sb, EXT2_SUPER_OFFSET) != sizeof sb ) {
+    perror("reading superblock");
+    return 1;
+  }
+
+  if ( sb.s_magic != EXT2_SUPER_MAGIC ) {
+    fprintf(stderr, "no ext2/ext3 superblock found on %s\n", device);
+    return 1;
+  }
+  
+  if ( xpwrite(fd, boot_block, boot_block_len, 0) != boot_block_len ) {
+    perror("writing bootblock");
+    return 1;
+  }
+
+  return 0;
+}
+
+int
+install_file(const char *path, int devfd, struct stat *rst)
+{
+  char *file;
+  int fd = -1, dirfd = -1, flags;
+  struct stat st;
+
+  asprintf(&file, "%s%sextlinux.sys",
+	   path,
+	   path[0] && path[strlen(path)-1] == '/' ? "" : "/");
+  if ( !file ) {
+    perror(program);
+    return 1;
+  }
+
+  dirfd = open(path, O_RDONLY|O_DIRECTORY);
+  if ( dirfd < 0 ) {
+    perror(path);
+    goto bail;
+  }
+    
+  fd = open(file, O_RDONLY);
+  if ( fd < 0 ) {
+    if ( errno != ENOENT ) {
+      perror(file);
+      goto bail;
+    }
+  } else {
+    /* If file exist, remove the immutable flag and set u+w mode */
+    if ( !ioctl(fd, EXT2_IOC_GETFLAGS, &flags) ) {
+      flags &= ~EXT2_IMMUTABLE_FL;
+      ioctl(fd, EXT2_IOC_SETFLAGS, &flags);
+    }
+    if ( !fstat(fd, &st) ) {
+      fchmod(fd, st.st_mode | S_IWUSR);
+    }
+  }
+  close(fd);
+
+  fd = open(file, O_WRONLY|O_TRUNC|O_CREAT, S_IRUSR|S_IRGRP|S_IROTH);
+  if ( fd < 0 ) {
+    perror(file);
+    goto bail;
+  }
+  
+  /* Write it the first time */
+  if ( xpwrite(fd, boot_image, boot_image_len, 0) != boot_image_len ) {
+    fprintf(stderr, "%s: write failure on %s\n", program, file);
+    goto bail;
+  }
+
+  /* Map the file, and patch the initial sector accordingly */
+  patch_file_and_bootblock(fd, dirfd, devfd);
+
+  /* Write it again - this relies on the file being overwritten in place! */
+  if ( xpwrite(fd, boot_image, boot_image_len, 0) != boot_image_len ) {
+    fprintf(stderr, "%s: write failure on %s\n", program, file);
+    goto bail;
+  }
+
+  /* Attempt to set immutable flag and remove all write access */
+  /* Only set immutable flag if file is owned by root */
+  if ( !fstat(fd, &st) ) {
+    fchmod(fd, st.st_mode & (S_IRUSR|S_IRGRP|S_IROTH));
+    if ( st.st_uid == 0 && !ioctl(fd, EXT2_IOC_GETFLAGS, &flags) ) {
+      flags |= EXT2_IMMUTABLE_FL;
+      ioctl(fd, EXT2_IOC_SETFLAGS, &flags);
+    }
+  }
+
+  if ( fstat(fd, rst) ) {
+    perror(file);
+    goto bail;
+  }
+
+  close(dirfd);
+  close(fd);
+  return 0;
+
+ bail:
+  if ( dirfd >= 0 )
+    close(dirfd);
+  if ( fd >= 0 )
+    close(fd);
+
+  return 1;
+}
+
+int
+install_loader(const char *path)
+{
+  struct stat st, dst, fst;
+  struct mntent *mnt = NULL;
+  int devfd, rv;
+  FILE *mtab;
+
+  if ( stat(path, &st) || !S_ISDIR(st.st_mode) ) {
+    fprintf(stderr, "%s: Not a directory: %s\n", program, path);
+    return 1;
+  }
+  
+  devfd = -1;
+
+  if ( (mtab = setmntent("/proc/mounts", "r")) ) {
+    while ( (mnt = getmntent(mtab)) ) {
+      if ( (!strcmp(mnt->mnt_type, "ext2") ||
+	    !strcmp(mnt->mnt_type, "ext3")) &&
+	   !stat(mnt->mnt_fsname, &dst) &&
+	   dst.st_rdev == st.st_dev ) {
+	fprintf(stderr, "%s is device %s\n", path, mnt->mnt_fsname);
+	if ( (devfd = open(mnt->mnt_fsname, O_RDWR|O_SYNC)) < 0 ) {
+	  fprintf(stderr, "%s: cannot open device %s\n", program, mnt->mnt_fsname);
+	  return 1;
+	}
+	break;
+      }
+    }
+  }
+
+  if ( devfd < 0 ) {
+    /* Didn't find it in /proc/mounts, try /etc/mtab */
+    if ( (mtab = setmntent("/etc/mtab", "r")) ) {
+      while ( (mnt = getmntent(mtab)) ) {
+	if ( (!strcmp(mnt->mnt_type, "ext2") ||
+	      !strcmp(mnt->mnt_type, "ext3")) &&
+	     !stat(mnt->mnt_fsname, &dst) &&
+	     dst.st_rdev == st.st_dev ) {
+	  fprintf(stderr, "%s is device %s\n", path, mnt->mnt_fsname);
+	  if ( (devfd = open(mnt->mnt_fsname, O_RDWR|O_SYNC)) < 0 ) {
+	    fprintf(stderr, "%s: cannot open device %s\n", program, mnt->mnt_fsname);
+	    return 1;
+	  }
+	  break;
+	}
+      }
+    }
+  }
+
+  if ( devfd < 0 ) {
+    fprintf(stderr, "%s: cannot find device for path %s\n", program, path);
+    return 1;
+  }
+
+  install_file(path, devfd, &fst);
+
+  if ( fst.st_dev != st.st_dev ) {
+    fprintf(stderr, "%s: file system changed under us - aborting!\n",
+	    program);
+    return 1;
+  }
+
+  sync();
+  rv = install_bootblock(devfd, mnt->mnt_fsname);
+  close(devfd);
+  sync();
+
+  endmntent(mtab);
+
+  if ( rv ) return rv;
+
+  return 0;
+}
+
+int
+main(int argc, char *argv[])
+{
+  int o;
+  const char *directory;
+
+  program = argv[0];
+
+  while ( (o = getopt_long(argc, argv, short_options,
+			     long_options, NULL)) != EOF ) {
+    switch ( o ) {
+    case 'z':
+      opt.heads = 64;
+      opt.sectors = 32;
+      break;
+    case 'S':
+      opt.sectors = strtoul(optarg, NULL, 0);
+      if ( opt.sectors < 1 || opt.sectors > 63 ) {
+	fprintf(stderr, "%s: invalid number of sectors: %u (must be 1-63)\n",
+		program, opt.sectors);
+	exit(EX_USAGE);
+      }
+      break;
+    case 'H':
+      opt.heads = strtoul(optarg, NULL, 0);
+      if ( opt.heads < 1 || opt.heads > 256 ) {
+	fprintf(stderr, "%s: invalid number of heads: %u (must be 1-256)\n",
+		program, opt.heads);
+	exit(EX_USAGE);
+      }
+      break;
+    case 'h':
+      usage(0);
+      break;
+    case 'v':
+      fputs("extlinux " VERSION "\n", stderr);
+      exit(0);
+    default:
+      fprintf(stderr, "%s: Unknown option: %c\n", program, optopt);
+      exit(EX_USAGE);
+    }
+  }
+
+  directory = argv[optind];
+
+  if ( !directory )
+    usage(EX_USAGE);
+
+  return install_loader(directory);
+}