restore.h

早期freebsd实现

/*
 * Copyright (c) 1983, 1993
 *	The Regents of the University of California.  All rights reserved.
 * (c) UNIX System Laboratories, Inc.
 * All or some portions of this file are derived from material licensed
 * to the University of California by American Telephone and Telegraph
 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
 * the permission of UNIX System Laboratories, 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 by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 THE REGENTS OR CONTRIBUTORS 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.
 *
 *	@(#)restore.h	8.2 (Berkeley) 1/21/94
 */

/*
 * Flags
 */
extern int	cvtflag;	/* convert from old to new tape format */
extern int	bflag;		/* set input block size */
extern int	dflag;		/* print out debugging info */
extern int	hflag;		/* restore heirarchies */
extern int	mflag;		/* restore by name instead of inode number */
extern int	Nflag;		/* do not write the disk */
extern int	vflag;		/* print out actions taken */
extern int	yflag;		/* always try to recover from tape errors */
/*
 * Global variables
 */
extern char	*dumpmap; 	/* map of inodes on this dump tape */
extern char	*clrimap; 	/* map of inodes to be deleted */
extern ino_t	maxino;		/* highest numbered inode in this file system */
extern long	dumpnum;	/* location of the dump on this tape */
extern long	volno;		/* current volume being read */
extern long	ntrec;		/* number of TP_BSIZE records per tape block */
extern time_t	dumptime;	/* time that this dump begins */
extern time_t	dumpdate;	/* time that this dump was made */
extern char	command;	/* opration being performed */
extern FILE	*terminal;	/* file descriptor for the terminal input */
extern int	oldinofmt;	/* reading tape with old format inodes */
extern int	Bcvt;		/* need byte swapping on inodes and dirs */

/*
 * Each file in the file system is described by one of these entries
 */
struct entry {
	char	*e_name;		/* the current name of this entry */
	u_char	e_namlen;		/* length of this name */
	char	e_type;			/* type of this entry, see below */
	short	e_flags;		/* status flags, see below */
	ino_t	e_ino;			/* inode number in previous file sys */
	long	e_index;		/* unique index (for dumpped table) */
	struct	entry *e_parent;	/* pointer to parent directory (..) */
	struct	entry *e_sibling;	/* next element in this directory (.) */
	struct	entry *e_links;		/* hard links to this inode */
	struct	entry *e_entries;	/* for directories, their entries */
	struct	entry *e_next;		/* hash chain list */
};
/* types */
#define	LEAF 1			/* non-directory entry */
#define NODE 2			/* directory entry */
#define LINK 4			/* synthesized type, stripped by addentry */
/* flags */
#define EXTRACT		0x0001	/* entry is to be replaced from the tape */
#define NEW		0x0002	/* a new entry to be extracted */
#define KEEP		0x0004	/* entry is not to change */
#define REMOVED		0x0010	/* entry has been removed */
#define TMPNAME		0x0020	/* entry has been given a temporary name */
#define EXISTED		0x0040	/* directory already existed during extract */

/*
 * Constants associated with entry structs
 */
#define HARDLINK	1
#define SYMLINK		2
#define TMPHDR		"RSTTMP"

/*
 * The entry describes the next file available on the tape
 */
struct context {
	char	*name;		/* name of file */
	ino_t	ino;		/* inumber of file */
	struct	dinode *dip;	/* pointer to inode */
	char	action;		/* action being taken on this file */
} curfile;
/* actions */
#define	USING	1	/* extracting from the tape */
#define	SKIP	2	/* skipping */
#define UNKNOWN 3	/* disposition or starting point is unknown */

/*
 * Definitions for library routines operating on directories.
 */
typedef struct rstdirdesc RST_DIR;

/*
 * Flags to setdirmodes.
 */
#define FORCE	0x0001

/*
 * Useful macros
 */
#define TSTINO(ino, map) \
	(map[(u_int)((ino) - 1) / NBBY] &  (1 << ((u_int)((ino) - 1) % NBBY)))

#define dprintf		if (dflag) fprintf
#define vprintf		if (vflag) fprintf

#define GOOD 1
#define FAIL 0