xref: /openbsd-src/usr.sbin/makefs/makefs.h (revision 4874b543168b8168ff9788e98a56e3398af44a49)

/*	$OpenBSD: makefs.h,v 1.13 2021/10/06 00:40:39 deraadt Exp $	*/
/*	$NetBSD: makefs.h,v 1.36 2015/11/25 00:48:49 christos Exp $	*/

/*
 * Copyright (c) 2001 Wasabi Systems, Inc.
 * All rights reserved.
 *
 * Written by Luke Mewburn for Wasabi Systems, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed for the NetBSD Project by
 *      Wasabi Systems, Inc.
 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
 *    or promote products derived from this software without specific prior
 *    written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef	_MAKEFS_H
#define	_MAKEFS_H

#include <sys/stat.h>
#include <err.h>

/*
 * fsnode -
 *	a component of the tree; contains a filename, a pointer to
 *	fsinode, optional symlink name, and tree pointers
 *
 * fsinode -
 *	equivalent to an inode, containing target file system inode number,
 *	refcount (nlink), and stat buffer
 *
 * A tree of fsnodes looks like this:
 *
 *	name	"."		"bin"		"netbsd"
 *	type	S_IFDIR		S_IFDIR		S_IFREG
 *	next	  >		  >		NULL
 *	parent	NULL		NULL		NULL
 *	child	NULL		  v
 *
 *	name			"."		"ls"
 *	type			S_IFDIR		S_IFREG
 *	next			  >		NULL
 *	parent			  ^		^ (to "bin")
 *	child			NULL		NULL
 *
 * Notes:
 *	-   first always points to first entry, at current level, which
 *	    must be "." when the tree has been built; during build it may
 *	    not be if "." hasn't yet been found by readdir(2).
 */

enum fi_flags {
	FI_SIZED =	1<<0,		/* inode sized */
	FI_ALLOCATED =	1<<1,		/* fsinode->ino allocated */
	FI_WRITTEN =	1<<2,		/* inode written */
};

typedef struct {
	uint32_t	 ino;		/* inode number used on target fs */
	uint32_t	 nlink;		/* number of links to this entry */
	enum fi_flags	 flags;		/* flags used by fs specific code */
	struct stat	 st;		/* stat entry */
	void		*fsuse;		/* for storing FS dependent info */
} fsinode;

typedef struct _fsnode {
	struct _fsnode	*parent;	/* parent (NULL if root) */
	struct _fsnode	*child;		/* child (if type == S_IFDIR) */
	struct _fsnode	*next;		/* next */
	struct _fsnode	*first;		/* first node of current level (".") */
	uint32_t	 type;		/* type of entry */
	fsinode		*inode;		/* actual inode data */
	char		*symlink;	/* symlink target */
	const char	*root;		/* root path */
	char		*path;		/* directory name */
	char		*name;		/* file name */
	int		flags;		/* misc flags */
} fsnode;

#define	FSNODE_F_HASSPEC	0x01	/* fsnode has a spec entry */

/*
 * option_t - contains option name, description, pointer to location to store
 * result, and range checks for the result. Used to simplify fs specific
 * option setting
 */
typedef enum {
	OPT_STRARRAY,
	OPT_STRPTR,
	OPT_STRBUF,
	OPT_BOOL,
	OPT_INT8,
	OPT_INT16,
	OPT_INT32,
	OPT_INT64
} opttype_t;

typedef struct {
	const char	*name;		/* option name */
	void		*value;		/* where to stuff the value */
	opttype_t	type;		/* type of entry */
	long long	minimum;	/* minimum for value */
	long long	maximum;	/* maximum for value */
} option_t;

/*
 * fsinfo_t - contains various settings and parameters pertaining to
 * the image, including current settings, global options, and fs
 * specific options
 */
typedef struct makefs_fsinfo {
		/* current settings */
	off_t	size;		/* total size */
	off_t	inodes;		/* number of inodes */
	uint32_t curinode;	/* current inode */

		/* image settings */
	int	fd;		/* file descriptor of image */
	void	*superblock;	/* superblock */

		/* global options */
	off_t	minsize;	/* minimum size image should be */
	off_t	maxsize;	/* maximum size image can be */
	off_t	freefiles;	/* free file entries to leave */
	off_t	freeblocks;	/* free blocks to leave */
	off_t	offset;		/* offset from start of file */
	int	freefilepc;	/* free file % */
	int	freeblockpc;	/* free block % */
	int	sectorsize;	/* sector size */

	void	*fs_specific;	/* File system specific additions. */
	option_t *fs_options;	/* File system specific options */
} fsinfo_t;




const char *	inode_type(mode_t);
int		set_option(const option_t *, const char *, char *, size_t);
int		set_option_var(const option_t *, const char *, const char *,
    char *, size_t);
fsnode *	walk_dir(const char *, const char *, fsnode *, fsnode *);
void		free_fsnodes(fsnode *);
option_t *	copy_opts(const option_t *);

#define DECLARE_FUN(fs)							\
void		fs ## _prep_opts(fsinfo_t *);				\
int		fs ## _parse_opts(const char *, fsinfo_t *);		\
void		fs ## _cleanup_opts(fsinfo_t *);			\
void		fs ## _makefs(const char *, const char *, fsnode *, fsinfo_t *)

DECLARE_FUN(ffs);
DECLARE_FUN(cd9660);
DECLARE_FUN(msdos);

extern	int Tflag;
extern	time_t stampts;
extern	struct timespec	start_time;


#ifndef	DEFAULT_FSTYPE
#define	DEFAULT_FSTYPE	"ffs"
#endif

#define MINIMUM(a, b)	(((a) < (b)) ? (a) : (b))
#define MAXIMUM(a, b)	(((a) > (b)) ? (a) : (b))

/* xmalloc.c */
void	*emalloc(size_t);
void	*ecalloc(size_t, size_t);
void	*erealloc(void *, size_t);
char	*estrdup(const char *);

#endif	/* _MAKEFS_H */