1363 lines
32 KiB
C
1363 lines
32 KiB
C
/* $OpenBSD: tape.c,v 1.54 2024/05/09 08:35:40 florian Exp $ */
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/* $NetBSD: tape.c,v 1.26 1997/04/15 07:12:25 lukem Exp $ */
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/*
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* Copyright (c) 1983, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/param.h> /* MAXBSIZE */
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#include <sys/ioctl.h>
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#include <sys/mtio.h>
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#include <sys/stat.h>
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#include <ufs/ufs/dinode.h>
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#include <protocols/dumprestore.h>
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#include <err.h>
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#include <fcntl.h>
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#include <paths.h>
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#include <setjmp.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <limits.h>
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#include "restore.h"
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#include "extern.h"
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static long fssize = MAXBSIZE;
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static int mt = -1;
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static int pipein = 0;
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static char magtape[BUFSIZ];
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static int blkcnt;
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static int numtrec;
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static char *tapebuf;
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static union u_spcl endoftapemark;
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static long blksread; /* blocks read since last header */
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static long tpblksread = 0; /* TP_BSIZE blocks read */
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static long tapesread;
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static jmp_buf restart;
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static int gettingfile = 0; /* restart has a valid frame */
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#ifdef RRESTORE
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static char *host = NULL;
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#endif
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static int ofile;
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static char *map;
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static char lnkbuf[PATH_MAX + 1];
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static size_t pathlen;
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struct context curfile; /* describes next file available on the tape */
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union u_spcl u_spcl; /* mapping of variables in a control block */
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int oldinofmt; /* old inode format conversion required */
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int Bcvt; /* Swap Bytes (for CCI or sun) */
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#define FLUSHTAPEBUF() blkcnt = ntrec + 1
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union u_ospcl {
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char dummy[TP_BSIZE];
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struct s_ospcl {
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int32_t c_type;
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int32_t c_date;
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int32_t c_ddate;
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int32_t c_volume;
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int32_t c_tapea;
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u_int16_t c_inumber;
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int32_t c_magic;
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int32_t c_checksum;
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struct odinode {
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unsigned short odi_mode;
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u_int16_t odi_nlink;
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u_int16_t odi_uid;
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u_int16_t odi_gid;
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int32_t odi_size;
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int32_t odi_rdev;
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char odi_addr[36];
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int32_t odi_atime;
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int32_t odi_mtime;
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int32_t odi_ctime;
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} c_odinode;
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int32_t c_count;
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char c_addr[256];
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} s_ospcl;
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};
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static void accthdr(struct s_spcl *);
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static int checksum(int *);
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static void findinode(struct s_spcl *);
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static void findtapeblksize(void);
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static int gethead(struct s_spcl *);
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static void readtape(char *);
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static void setdumpnum(void);
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static void swap_header(struct s_spcl *);
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static void swap_old_header(struct s_ospcl *);
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static void terminateinput(void);
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static void xtrlnkfile(char *, size_t);
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static void xtrlnkskip(char *, size_t);
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static void xtrmap(char *, size_t);
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static void xtrmapskip(char *, size_t);
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static void xtrskip(char *, size_t);
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/*
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* Set up an input source
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*/
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void
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setinput(char *source)
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{
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FLUSHTAPEBUF();
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if (bflag)
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newtapebuf(ntrec);
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else
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/* Max out buffer size, let findtapeblksize() set ntrec. */
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newtapebuf(MAXBSIZE / TP_BSIZE);
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terminal = stdin;
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#ifdef RRESTORE
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if (strchr(source, ':')) {
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host = source;
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source = strchr(host, ':');
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*source++ = '\0';
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if (rmthost(host) == 0)
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exit(1);
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} else
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#endif
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if (strcmp(source, "-") == 0) {
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/*
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* Since input is coming from a pipe we must establish
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* our own connection to the terminal.
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*/
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terminal = fopen(_PATH_TTY, "r");
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if (terminal == NULL) {
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warn("cannot open %s", _PATH_TTY);
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terminal = fopen(_PATH_DEVNULL, "r");
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if (terminal == NULL)
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err(1, "cannot open %s", _PATH_DEVNULL);
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}
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pipein++;
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}
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(void)strlcpy(magtape, source, sizeof magtape);
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}
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void
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newtapebuf(long size)
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{
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static long tapebufsize = -1;
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ntrec = size;
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if (size <= tapebufsize)
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return;
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free(tapebuf);
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tapebuf = calloc(size, TP_BSIZE);
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if (tapebuf == NULL)
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errx(1, "Cannot allocate space for tape buffer");
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tapebufsize = size;
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}
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/*
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* Verify that the tape drive can be accessed and
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* that it actually is a dump tape.
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*/
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void
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setup(void)
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{
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int i, j, *ip;
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struct stat stbuf;
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Vprintf(stdout, "Verify tape and initialize maps\n");
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#ifdef RRESTORE
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if (host)
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mt = rmtopen(magtape, O_RDONLY);
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else
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#endif
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if (pipein)
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mt = 0;
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else
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mt = open(magtape, O_RDONLY);
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if (mt == -1)
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err(1, "%s", magtape);
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volno = 1;
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setdumpnum();
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FLUSHTAPEBUF();
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if (!pipein && !bflag)
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findtapeblksize();
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if (gethead(&spcl) == FAIL) {
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blkcnt--; /* push back this block */
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blksread--;
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tpblksread--;
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cvtflag++;
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if (gethead(&spcl) == FAIL)
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errx(1, "Tape is not a dump tape");
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(void)fputs("Converting to new file system format.\n", stderr);
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}
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if (pipein) {
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endoftapemark.s_spcl.c_magic = cvtflag ? OFS_MAGIC :
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FS_UFS2_MAGIC;
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endoftapemark.s_spcl.c_type = TS_END;
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ip = (int *)&endoftapemark;
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j = sizeof(union u_spcl) / sizeof(int);
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i = 0;
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do
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i += *ip++;
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while (--j);
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endoftapemark.s_spcl.c_checksum = CHECKSUM - i;
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}
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if (vflag || command == 't')
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printdumpinfo();
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dumptime = (time_t)spcl.c_ddate;
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dumpdate = (time_t)spcl.c_date;
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if (stat(".", &stbuf) == -1)
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err(1, "cannot stat .");
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if (stbuf.st_blksize > 0 && stbuf.st_blksize < TP_BSIZE )
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fssize = TP_BSIZE;
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if (stbuf.st_blksize >= TP_BSIZE && stbuf.st_blksize <= MAXBSIZE)
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fssize = stbuf.st_blksize;
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if (((fssize - 1) & fssize) != 0)
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errx(1, "bad block size %ld", fssize);
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if (spcl.c_volume != 1)
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errx(1, "Tape is not volume 1 of the dump");
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if (gethead(&spcl) == FAIL) {
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Dprintf(stdout, "header read failed at %ld blocks\n", blksread);
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panic("no header after volume mark!\n");
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}
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findinode(&spcl);
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if (spcl.c_type != TS_CLRI)
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errx(1, "Cannot find file removal list");
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maxino = (spcl.c_count * TP_BSIZE * NBBY) + 1;
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Dprintf(stdout, "maxino = %llu\n", (unsigned long long)maxino);
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map = calloc(1, howmany(maxino, NBBY));
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if (map == NULL)
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panic("no memory for active inode map\n");
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usedinomap = map;
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curfile.action = USING;
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getfile(xtrmap, xtrmapskip);
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if (spcl.c_type != TS_BITS)
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errx(1, "Cannot find file dump list");
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map = calloc(1, howmany(maxino, NBBY));
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if (map == NULL)
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panic("no memory for file dump list\n");
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dumpmap = map;
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curfile.action = USING;
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getfile(xtrmap, xtrmapskip);
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}
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/*
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* Prompt user to load a new dump volume.
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* "Nextvol" is the next suggested volume to use.
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* This suggested volume is enforced when doing full
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* or incremental restores, but can be overrridden by
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* the user when only extracting a subset of the files.
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*/
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void
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getvol(long nextvol)
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{
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long newvol = 0, savecnt = 0, wantnext = 0, i;
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union u_spcl tmpspcl;
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# define tmpbuf tmpspcl.s_spcl
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char buf[TP_BSIZE];
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const char *errstr;
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if (nextvol == 1) {
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tapesread = 0;
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gettingfile = 0;
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}
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if (pipein) {
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if (nextvol != 1)
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panic("Changing volumes on pipe input?\n");
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if (volno == 1)
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return;
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goto gethdr;
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}
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savecnt = blksread;
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again:
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if (pipein)
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exit(1); /* pipes do not get a second chance */
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if (command == 'R' || command == 'r' || curfile.action != SKIP) {
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newvol = nextvol;
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wantnext = 1;
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} else {
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newvol = 0;
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wantnext = 0;
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}
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while (newvol <= 0) {
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if (tapesread == 0) {
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fprintf(stderr, "%s%s%s%s%s",
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"You have not read any tapes yet.\n",
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"Unless you know which volume your",
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" file(s) are on you should start\n",
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"with the last volume and work",
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" towards the first.\n");
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} else {
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fprintf(stderr, "You have read volumes");
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strlcpy(buf, ": ", sizeof buf);
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for (i = 1; i < 32; i++)
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if (tapesread & (1 << i)) {
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fprintf(stderr, "%s%ld", buf, i);
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strlcpy(buf, ", ", sizeof buf);
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}
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fprintf(stderr, "\n");
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}
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do {
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fprintf(stderr, "Specify next volume #: ");
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(void)fflush(stderr);
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if (fgets(buf, sizeof buf, terminal) == NULL)
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exit(1);
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buf[strcspn(buf, "\n")] = '\0';
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newvol = strtonum(buf, 1, INT_MAX, &errstr);
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if (errstr)
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fprintf(stderr, "Volume number %s: %s\n", errstr, buf);
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} while (errstr);
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}
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if (newvol == volno) {
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tapesread |= 1 << volno;
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return;
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}
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closemt();
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fprintf(stderr, "Mount tape volume %ld\n", newvol);
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fprintf(stderr, "Enter ``none'' if there are no more tapes\n");
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fprintf(stderr, "otherwise enter tape name (default: %s) ", magtape);
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(void)fflush(stderr);
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if (fgets(buf, sizeof buf, terminal) == NULL || feof(terminal))
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exit(1);
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buf[strcspn(buf, "\n")] = '\0';
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if (strcmp(buf, "none") == 0) {
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terminateinput();
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return;
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}
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if (buf[0] != '\0')
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(void)strlcpy(magtape, buf, sizeof magtape);
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#ifdef RRESTORE
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if (host)
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mt = rmtopen(magtape, O_RDONLY);
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else
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#endif
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mt = open(magtape, O_RDONLY);
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if (mt == -1) {
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fprintf(stderr, "Cannot open %s\n", magtape);
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volno = -1;
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goto again;
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}
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gethdr:
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volno = newvol;
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setdumpnum();
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FLUSHTAPEBUF();
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if (gethead(&tmpbuf) == FAIL) {
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Dprintf(stdout, "header read failed at %ld blocks\n", blksread);
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fprintf(stderr, "tape is not dump tape\n");
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volno = 0;
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goto again;
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}
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if (tmpbuf.c_volume != volno) {
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fprintf(stderr, "Wrong volume (%d)\n", tmpbuf.c_volume);
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volno = 0;
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goto again;
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}
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if (tmpbuf.c_date != dumpdate || tmpbuf.c_ddate != dumptime) {
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time_t t = (time_t)tmpbuf.c_date;
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char ct1buf[26], ct2buf[26];
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char *ct1, *ct2;
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ct1 = ctime_r(&t, ct1buf);
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ct2 = ctime_r(&dumpdate, ct2buf);
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if (ct1 && ct2) {
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fprintf(stderr, "Wrong dump date\n\tgot: %s", ct1);
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fprintf(stderr, "\twanted: %s", ct2);
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} else {
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fprintf(stderr, "Wrong dump date\n\tgot: %lld\n", t);
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fprintf(stderr, "\twanted: %lld\n", dumpdate);
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}
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volno = 0;
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goto again;
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}
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tapesread |= 1 << volno;
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blksread = savecnt;
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/*
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* If continuing from the previous volume, skip over any
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* blocks read already at the end of the previous volume.
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*
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* If coming to this volume at random, skip to the beginning
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* of the next record.
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*/
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Dprintf(stdout, "read %ld recs, tape starts with %lld\n",
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tpblksread, tmpbuf.c_firstrec);
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if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER)) {
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if (!wantnext) {
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tpblksread = tmpbuf.c_firstrec;
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for (i = tmpbuf.c_count; i > 0; i--)
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readtape(buf);
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} else if (tmpbuf.c_firstrec > 0 &&
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tmpbuf.c_firstrec < tpblksread - 1) {
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/*
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* -1 since we've read the volume header
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*/
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i = tpblksread - tmpbuf.c_firstrec - 1;
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Dprintf(stderr, "Skipping %ld duplicate record%s.\n",
|
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i, (i == 1) ? "" : "s");
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while (--i >= 0)
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readtape(buf);
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}
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}
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if (curfile.action == USING) {
|
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if (volno == 1)
|
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panic("active file into volume 1\n");
|
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return;
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}
|
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/*
|
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* Skip up to the beginning of the next record
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*/
|
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if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER))
|
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for (i = tmpbuf.c_count; i > 0; i--)
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readtape(buf);
|
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(void)gethead(&spcl);
|
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findinode(&spcl);
|
|
if (gettingfile) {
|
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gettingfile = 0;
|
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longjmp(restart, 1);
|
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}
|
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}
|
|
|
|
/*
|
|
* Handle unexpected EOF.
|
|
*/
|
|
static void
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terminateinput(void)
|
|
{
|
|
|
|
if (gettingfile && curfile.action == USING) {
|
|
printf("Warning: %s %s\n",
|
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"End-of-input encountered while extracting", curfile.name);
|
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}
|
|
curfile.name = "<name unknown>";
|
|
curfile.action = UNKNOWN;
|
|
curfile.mode = 0;
|
|
curfile.ino = maxino;
|
|
if (gettingfile) {
|
|
gettingfile = 0;
|
|
longjmp(restart, 1);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* handle multiple dumps per tape by skipping forward to the
|
|
* appropriate one.
|
|
*/
|
|
static void
|
|
setdumpnum(void)
|
|
{
|
|
struct mtop tcom;
|
|
|
|
if (dumpnum == 1 || volno != 1)
|
|
return;
|
|
if (pipein)
|
|
errx(1, "Cannot have multiple dumps on pipe input");
|
|
tcom.mt_op = MTFSF;
|
|
tcom.mt_count = dumpnum - 1;
|
|
#ifdef RRESTORE
|
|
if (host)
|
|
rmtioctl(MTFSF, dumpnum - 1);
|
|
else
|
|
#endif
|
|
if (ioctl(mt, MTIOCTOP, (char *)&tcom) == -1)
|
|
warn("ioctl MTFSF");
|
|
}
|
|
|
|
void
|
|
printdumpinfo(void)
|
|
{
|
|
time_t t;
|
|
char *ct;
|
|
|
|
t = (time_t)spcl.c_date;
|
|
ct = ctime(&t);
|
|
if (ct)
|
|
fprintf(stdout, "Dump date: %s", ct);
|
|
else
|
|
fprintf(stdout, "Dump date: %lld\n", t);
|
|
t = (time_t)spcl.c_ddate;
|
|
ct = ctime(&t);
|
|
if (ct)
|
|
fprintf(stdout, "Dumped from: %s",
|
|
(spcl.c_ddate == 0) ? "the epoch\n" : ct);
|
|
else
|
|
fprintf(stdout, "Dumped from: %lld\n", t);
|
|
if (spcl.c_host[0] == '\0')
|
|
return;
|
|
fprintf(stderr, "Level %d dump of %s on %s:%s\n",
|
|
spcl.c_level, spcl.c_filesys, spcl.c_host, spcl.c_dev);
|
|
fprintf(stderr, "Label: %s\n", spcl.c_label);
|
|
}
|
|
|
|
int
|
|
extractfile(char *name)
|
|
{
|
|
u_int flags;
|
|
uid_t uid;
|
|
gid_t gid;
|
|
mode_t mode;
|
|
struct timespec mtimep[2], ctimep[2];
|
|
struct entry *ep;
|
|
int setbirth;
|
|
|
|
curfile.name = name;
|
|
curfile.action = USING;
|
|
mtimep[0].tv_sec = curfile.atime_sec;
|
|
mtimep[0].tv_nsec = curfile.atime_nsec;
|
|
mtimep[1].tv_sec = curfile.mtime_sec;
|
|
mtimep[1].tv_nsec = curfile.mtime_nsec;
|
|
|
|
setbirth = curfile.birthtime_sec != 0;
|
|
if (setbirth) {
|
|
ctimep[0].tv_sec = curfile.atime_sec;
|
|
ctimep[0].tv_nsec = curfile.atime_nsec;
|
|
ctimep[1].tv_sec = curfile.birthtime_sec;
|
|
ctimep[1].tv_nsec = curfile.birthtime_nsec;
|
|
}
|
|
uid = curfile.uid;
|
|
gid = curfile.gid;
|
|
mode = curfile.mode;
|
|
flags = curfile.file_flags;
|
|
switch (mode & IFMT) {
|
|
|
|
default:
|
|
fprintf(stderr, "%s: unknown file mode 0%o\n", name, mode);
|
|
skipfile();
|
|
return (FAIL);
|
|
|
|
case IFSOCK:
|
|
Vprintf(stdout, "skipped socket %s\n", name);
|
|
skipfile();
|
|
return (GOOD);
|
|
|
|
case IFDIR:
|
|
if (mflag) {
|
|
ep = lookupname(name);
|
|
if (ep == NULL || ep->e_flags & EXTRACT)
|
|
panic("unextracted directory %s\n", name);
|
|
skipfile();
|
|
return (GOOD);
|
|
}
|
|
Vprintf(stdout, "extract file %s\n", name);
|
|
return (genliteraldir(name, curfile.ino));
|
|
|
|
case IFLNK: {
|
|
lnkbuf[0] = '\0';
|
|
pathlen = 0;
|
|
getfile(xtrlnkfile, xtrlnkskip);
|
|
if (pathlen == 0) {
|
|
Vprintf(stdout,
|
|
"%s: zero length symbolic link (ignored)\n",
|
|
name);
|
|
return (GOOD);
|
|
}
|
|
if (linkit(lnkbuf, name, SYMLINK) == FAIL)
|
|
return (FAIL);
|
|
(void)lchown(name, uid, gid);
|
|
(void)fchmodat(AT_FDCWD, name, mode,
|
|
AT_SYMLINK_NOFOLLOW);
|
|
return (GOOD);
|
|
}
|
|
|
|
case IFCHR:
|
|
case IFBLK:
|
|
Vprintf(stdout, "extract special file %s\n", name);
|
|
if (Nflag) {
|
|
skipfile();
|
|
return (GOOD);
|
|
}
|
|
if (mknod(name, mode, (int)curfile.rdev) == -1) {
|
|
warn("%s: cannot create special file", name);
|
|
skipfile();
|
|
return (FAIL);
|
|
}
|
|
(void)chown(name, uid, gid);
|
|
(void)chmod(name, mode);
|
|
(void)chflags(name, flags);
|
|
skipfile();
|
|
if (setbirth)
|
|
(void)utimensat(AT_FDCWD, name, ctimep, 0);
|
|
(void)utimensat(AT_FDCWD, name, mtimep, 0);
|
|
return (GOOD);
|
|
|
|
case IFIFO:
|
|
Vprintf(stdout, "extract fifo %s\n", name);
|
|
if (Nflag) {
|
|
skipfile();
|
|
return (GOOD);
|
|
}
|
|
if (mkfifo(name, mode) == -1) {
|
|
warn("%s: cannot create fifo", name);
|
|
skipfile();
|
|
return (FAIL);
|
|
}
|
|
(void)chown(name, uid, gid);
|
|
(void)chmod(name, mode);
|
|
(void)chflags(name, flags);
|
|
skipfile();
|
|
if (setbirth)
|
|
(void)utimensat(AT_FDCWD, name, ctimep, 0);
|
|
(void)utimensat(AT_FDCWD, name, mtimep, 0);
|
|
return (GOOD);
|
|
|
|
case IFREG:
|
|
Vprintf(stdout, "extract file %s\n", name);
|
|
if (Nflag) {
|
|
skipfile();
|
|
return (GOOD);
|
|
}
|
|
if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC,
|
|
0666)) == -1) {
|
|
warn("%s: cannot create file", name);
|
|
skipfile();
|
|
return (FAIL);
|
|
}
|
|
(void)fchown(ofile, curfile.uid, curfile.gid);
|
|
(void)fchmod(ofile, mode);
|
|
(void)fchflags(ofile, flags);
|
|
getfile(xtrfile, xtrskip);
|
|
(void)close(ofile);
|
|
if (setbirth)
|
|
(void)utimensat(AT_FDCWD, name, ctimep, 0);
|
|
(void)utimensat(AT_FDCWD, name, mtimep, 0);
|
|
return (GOOD);
|
|
}
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
/*
|
|
* skip over bit maps on the tape
|
|
*/
|
|
void
|
|
skipmaps(void)
|
|
{
|
|
|
|
while (spcl.c_type == TS_BITS || spcl.c_type == TS_CLRI)
|
|
skipfile();
|
|
}
|
|
|
|
/*
|
|
* skip over a file on the tape
|
|
*/
|
|
void
|
|
skipfile(void)
|
|
{
|
|
|
|
curfile.action = SKIP;
|
|
getfile(xtrnull, xtrnull);
|
|
}
|
|
|
|
/*
|
|
* Extract a file from the tape.
|
|
* When an allocated block is found it is passed to the fill function;
|
|
* when an unallocated block (hole) is found, a zeroed buffer is passed
|
|
* to the skip function.
|
|
*
|
|
* For some block types (TS_BITS, TS_CLRI), the c_addr map is not meaningful
|
|
* and no blocks should be skipped.
|
|
*/
|
|
void
|
|
getfile(void (*fill)(char *, size_t), void (*skip)(char *, size_t))
|
|
{
|
|
int i;
|
|
volatile int curblk = 0;
|
|
volatile off_t size = spcl.c_size;
|
|
static char clearedbuf[MAXBSIZE];
|
|
char buf[MAXBSIZE / TP_BSIZE][TP_BSIZE];
|
|
char junk[TP_BSIZE];
|
|
volatile int noskip = (spcl.c_type == TS_BITS || spcl.c_type == TS_CLRI);
|
|
|
|
if (spcl.c_type == TS_END)
|
|
panic("ran off end of tape\n");
|
|
if (spcl.c_magic != FS_UFS2_MAGIC)
|
|
panic("not at beginning of a file\n");
|
|
if (!gettingfile && setjmp(restart) != 0)
|
|
return;
|
|
gettingfile++;
|
|
loop:
|
|
for (i = 0; i < spcl.c_count; i++) {
|
|
if (noskip || spcl.c_addr[i]) {
|
|
readtape(&buf[curblk++][0]);
|
|
if (curblk == fssize / TP_BSIZE) {
|
|
(*fill)((char *)buf, size > TP_BSIZE ?
|
|
fssize :
|
|
((off_t)curblk - 1) * TP_BSIZE + size);
|
|
curblk = 0;
|
|
}
|
|
} else {
|
|
if (curblk > 0) {
|
|
(*fill)((char *)buf, size > TP_BSIZE ?
|
|
(curblk * TP_BSIZE) :
|
|
((off_t)curblk - 1) * TP_BSIZE + size);
|
|
curblk = 0;
|
|
}
|
|
(*skip)(clearedbuf, size > TP_BSIZE ?
|
|
TP_BSIZE : size);
|
|
}
|
|
if ((size -= TP_BSIZE) <= 0) {
|
|
for (i++; i < spcl.c_count; i++)
|
|
if (noskip || spcl.c_addr[i])
|
|
readtape(junk);
|
|
break;
|
|
}
|
|
}
|
|
if (gethead(&spcl) == GOOD && size > 0) {
|
|
if (spcl.c_type == TS_ADDR)
|
|
goto loop;
|
|
Dprintf(stdout,
|
|
"Missing address (header) block for %s at %ld blocks\n",
|
|
curfile.name, blksread);
|
|
}
|
|
if (curblk > 0)
|
|
(*fill)((char *)buf, ((off_t)curblk * TP_BSIZE) + size);
|
|
findinode(&spcl);
|
|
gettingfile = 0;
|
|
}
|
|
|
|
/*
|
|
* Write out the next block of a file.
|
|
*/
|
|
void
|
|
xtrfile(char *buf, size_t size)
|
|
{
|
|
|
|
if (Nflag)
|
|
return;
|
|
if (write(ofile, buf, size) == -1)
|
|
err(1, "write error extracting inode %llu, name %s\nwrite",
|
|
(unsigned long long)curfile.ino, curfile.name);
|
|
}
|
|
|
|
/*
|
|
* Skip over a hole in a file.
|
|
*/
|
|
static void
|
|
xtrskip(char *buf, size_t size)
|
|
{
|
|
|
|
if (lseek(ofile, (off_t)size, SEEK_CUR) == -1)
|
|
err(1, "seek error extracting inode %llu, name %s\nlseek",
|
|
(unsigned long long)curfile.ino, curfile.name);
|
|
}
|
|
|
|
/*
|
|
* Collect the next block of a symbolic link.
|
|
*/
|
|
static void
|
|
xtrlnkfile(char *buf, size_t size)
|
|
{
|
|
|
|
pathlen += size;
|
|
if (pathlen > PATH_MAX)
|
|
errx(1, "symbolic link name: %s->%s%s; too long %lu",
|
|
curfile.name, lnkbuf, buf, (u_long)pathlen);
|
|
(void)strlcat(lnkbuf, buf, sizeof(lnkbuf));
|
|
}
|
|
|
|
/*
|
|
* Skip over a hole in a symbolic link (should never happen).
|
|
*/
|
|
static void
|
|
xtrlnkskip(char *buf, size_t size)
|
|
{
|
|
|
|
errx(1, "unallocated block in symbolic link %s", curfile.name);
|
|
}
|
|
|
|
/*
|
|
* Collect the next block of a bit map.
|
|
*/
|
|
static void
|
|
xtrmap(char *buf, size_t size)
|
|
{
|
|
|
|
memcpy(map, buf, size);
|
|
map += size;
|
|
}
|
|
|
|
/*
|
|
* Skip over a hole in a bit map (should never happen).
|
|
*/
|
|
static void
|
|
xtrmapskip(char *buf, size_t size)
|
|
{
|
|
|
|
panic("hole in map\n");
|
|
map += size;
|
|
}
|
|
|
|
/*
|
|
* Noop, when an extraction function is not needed.
|
|
*/
|
|
void
|
|
xtrnull(char *buf, size_t size)
|
|
{
|
|
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Read TP_BSIZE blocks from the input.
|
|
* Handle read errors, and end of media.
|
|
*/
|
|
static void
|
|
readtape(char *buf)
|
|
{
|
|
long rd, newvol, i;
|
|
int cnt, seek_failed;
|
|
|
|
if (blkcnt < numtrec) {
|
|
memcpy(buf, &tapebuf[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
|
|
blksread++;
|
|
tpblksread++;
|
|
return;
|
|
}
|
|
for (i = 0; i < ntrec; i++)
|
|
((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
|
|
if (numtrec == 0)
|
|
numtrec = ntrec;
|
|
cnt = ntrec * TP_BSIZE;
|
|
rd = 0;
|
|
getmore:
|
|
#ifdef RRESTORE
|
|
if (host)
|
|
i = rmtread(&tapebuf[rd], cnt);
|
|
else
|
|
#endif
|
|
i = read(mt, &tapebuf[rd], cnt);
|
|
/*
|
|
* Check for mid-tape short read error.
|
|
* If found, skip rest of buffer and start with the next.
|
|
*/
|
|
if (!pipein && numtrec < ntrec && i > 0) {
|
|
Dprintf(stdout, "mid-media short read error.\n");
|
|
numtrec = ntrec;
|
|
}
|
|
/*
|
|
* Handle partial block read.
|
|
*/
|
|
if (pipein && i == 0 && rd > 0)
|
|
i = rd;
|
|
else if (i > 0 && i != ntrec * TP_BSIZE) {
|
|
if (pipein) {
|
|
rd += i;
|
|
cnt -= i;
|
|
if (cnt > 0)
|
|
goto getmore;
|
|
i = rd;
|
|
} else {
|
|
/*
|
|
* Short read. Process the blocks read.
|
|
*/
|
|
if (i % TP_BSIZE != 0)
|
|
Vprintf(stdout,
|
|
"partial block read: %ld should be %ld\n",
|
|
i, ntrec * TP_BSIZE);
|
|
numtrec = i / TP_BSIZE;
|
|
}
|
|
}
|
|
/*
|
|
* Handle read error.
|
|
*/
|
|
if (i < 0) {
|
|
fprintf(stderr, "Tape read error while ");
|
|
switch (curfile.action) {
|
|
default:
|
|
fprintf(stderr, "trying to set up tape\n");
|
|
break;
|
|
case UNKNOWN:
|
|
fprintf(stderr, "trying to resynchronize\n");
|
|
break;
|
|
case USING:
|
|
fprintf(stderr, "restoring %s\n", curfile.name);
|
|
break;
|
|
case SKIP:
|
|
fprintf(stderr, "skipping over inode %llu\n",
|
|
(unsigned long long)curfile.ino);
|
|
break;
|
|
}
|
|
if (!yflag && !reply("continue"))
|
|
exit(1);
|
|
i = ntrec * TP_BSIZE;
|
|
memset(tapebuf, 0, i);
|
|
#ifdef RRESTORE
|
|
if (host)
|
|
seek_failed = (rmtseek(i, 1) < 0);
|
|
else
|
|
#endif
|
|
seek_failed = (lseek(mt, i, SEEK_CUR) == (off_t)-1);
|
|
|
|
if (seek_failed)
|
|
err(1, "continuation failed");
|
|
}
|
|
/*
|
|
* Handle end of tape.
|
|
*/
|
|
if (i == 0) {
|
|
Vprintf(stdout, "End-of-tape encountered\n");
|
|
if (!pipein) {
|
|
newvol = volno + 1;
|
|
volno = 0;
|
|
numtrec = 0;
|
|
getvol(newvol);
|
|
readtape(buf);
|
|
return;
|
|
}
|
|
if (rd % TP_BSIZE != 0)
|
|
panic("partial block read: %ld should be %ld\n",
|
|
rd, ntrec * TP_BSIZE);
|
|
terminateinput();
|
|
memcpy(&tapebuf[rd], &endoftapemark, TP_BSIZE);
|
|
}
|
|
blkcnt = 0;
|
|
memcpy(buf, &tapebuf[(blkcnt++ * TP_BSIZE)], TP_BSIZE);
|
|
blksread++;
|
|
tpblksread++;
|
|
}
|
|
|
|
static void
|
|
findtapeblksize(void)
|
|
{
|
|
long i;
|
|
|
|
for (i = 0; i < ntrec; i++)
|
|
((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0;
|
|
blkcnt = 0;
|
|
#ifdef RRESTORE
|
|
if (host)
|
|
i = rmtread(tapebuf, ntrec * TP_BSIZE);
|
|
else
|
|
#endif
|
|
i = read(mt, tapebuf, ntrec * TP_BSIZE);
|
|
|
|
if (i <= 0)
|
|
err(1, "tape read error");
|
|
if (i % TP_BSIZE != 0) {
|
|
errx(1,
|
|
"Tape block size (%ld) is not a multiple of dump block size (%d)",
|
|
i, TP_BSIZE);
|
|
}
|
|
ntrec = i / TP_BSIZE;
|
|
numtrec = ntrec;
|
|
Vprintf(stdout, "Tape block size is %ld\n", ntrec);
|
|
}
|
|
|
|
void
|
|
closemt(void)
|
|
{
|
|
|
|
if (mt < 0)
|
|
return;
|
|
#ifdef RRESTORE
|
|
if (host)
|
|
rmtclose();
|
|
else
|
|
#endif
|
|
(void)close(mt);
|
|
}
|
|
|
|
/*
|
|
* Read the next block from the tape.
|
|
* Check to see if it is one of several vintage headers.
|
|
* If it is an old style header, convert it to a new style header.
|
|
* If it is not any valid header, return an error.
|
|
*/
|
|
static int
|
|
gethead(struct s_spcl *buf)
|
|
{
|
|
union u_ospcl u_ospcl;
|
|
|
|
if (!cvtflag) {
|
|
readtape((char *)buf);
|
|
if (buf->c_magic != NFS_MAGIC &&
|
|
buf->c_magic != FS_UFS2_MAGIC) {
|
|
if (swap32(buf->c_magic) != NFS_MAGIC &&
|
|
swap32(buf->c_magic) != FS_UFS2_MAGIC)
|
|
return (FAIL);
|
|
if (!Bcvt) {
|
|
Vprintf(stdout, "Note: Doing Byte swapping\n");
|
|
Bcvt = 1;
|
|
}
|
|
}
|
|
if (checksum((int *)buf) == FAIL)
|
|
return (FAIL);
|
|
if (Bcvt)
|
|
swap_header(buf);
|
|
goto good;
|
|
}
|
|
|
|
readtape((char *)(&u_ospcl.s_ospcl));
|
|
if (checksum((int *)(&u_ospcl.s_ospcl)) == FAIL)
|
|
return (FAIL);
|
|
if (u_ospcl.s_ospcl.c_magic != OFS_MAGIC) {
|
|
if (swap32(u_ospcl.s_ospcl.c_magic) != OFS_MAGIC)
|
|
return (FAIL);
|
|
if (!Bcvt) {
|
|
fprintf(stdout, "Note: Doing Byte swapping\n");
|
|
Bcvt = 1;
|
|
}
|
|
swap_old_header(&u_ospcl.s_ospcl);
|
|
}
|
|
|
|
memset(buf, 0, TP_BSIZE);
|
|
buf->c_type = u_ospcl.s_ospcl.c_type;
|
|
buf->c_date = u_ospcl.s_ospcl.c_date;
|
|
buf->c_ddate = u_ospcl.s_ospcl.c_ddate;
|
|
buf->c_volume = u_ospcl.s_ospcl.c_volume;
|
|
buf->c_tapea = u_ospcl.s_ospcl.c_tapea;
|
|
buf->c_inumber = u_ospcl.s_ospcl.c_inumber;
|
|
buf->c_checksum = u_ospcl.s_ospcl.c_checksum;
|
|
buf->c_mode = u_ospcl.s_ospcl.c_odinode.odi_mode;
|
|
buf->c_uid = u_ospcl.s_ospcl.c_odinode.odi_uid;
|
|
buf->c_gid = u_ospcl.s_ospcl.c_odinode.odi_gid;
|
|
buf->c_size = u_ospcl.s_ospcl.c_odinode.odi_size;
|
|
buf->c_rdev = u_ospcl.s_ospcl.c_odinode.odi_rdev;
|
|
buf->c_atime = u_ospcl.s_ospcl.c_odinode.odi_atime;
|
|
buf->c_mtime = u_ospcl.s_ospcl.c_odinode.odi_mtime;
|
|
buf->c_count = u_ospcl.s_ospcl.c_count;
|
|
memcpy(buf->c_addr, u_ospcl.s_ospcl.c_addr, 256);
|
|
buf->c_magic = FS_UFS2_MAGIC;
|
|
good:
|
|
switch (buf->c_type) {
|
|
|
|
case TS_CLRI:
|
|
case TS_BITS:
|
|
/*
|
|
* Have to patch up missing information in bit map headers
|
|
*/
|
|
buf->c_inumber = 0;
|
|
buf->c_size = buf->c_count * TP_BSIZE;
|
|
break;
|
|
|
|
case TS_TAPE:
|
|
if ((buf->c_flags & DR_NEWINODEFMT) == 0)
|
|
oldinofmt = 1;
|
|
/* fall through */
|
|
case TS_END:
|
|
buf->c_inumber = 0;
|
|
break;
|
|
|
|
case TS_INODE:
|
|
if (buf->c_magic == NFS_MAGIC) {
|
|
buf->c_tapea = buf->c_old_tapea;
|
|
buf->c_firstrec = buf->c_old_firstrec;
|
|
buf->c_date = buf->c_old_date;
|
|
buf->c_ddate = buf->c_old_ddate;
|
|
buf->c_atime = buf->c_old_atime;
|
|
buf->c_mtime = buf->c_old_mtime;
|
|
buf->c_birthtime = 0;
|
|
buf->c_birthtimensec = 0;
|
|
buf->c_atimensec = buf->c_mtimensec = 0;
|
|
}
|
|
|
|
case TS_ADDR:
|
|
break;
|
|
|
|
default:
|
|
panic("gethead: unknown inode type %d\n", buf->c_type);
|
|
break;
|
|
}
|
|
|
|
buf->c_magic = FS_UFS2_MAGIC;
|
|
|
|
/*
|
|
* If we are restoring a filesystem with old format inodes,
|
|
* copy the uid/gid to the new location.
|
|
*/
|
|
if (oldinofmt) {
|
|
buf->c_uid = buf->c_spare1[1];
|
|
buf->c_gid = buf->c_spare1[2];
|
|
}
|
|
if (dflag)
|
|
accthdr(buf);
|
|
return(GOOD);
|
|
}
|
|
|
|
/*
|
|
* Check that a header is where it belongs and predict the next header
|
|
*/
|
|
static void
|
|
accthdr(struct s_spcl *header)
|
|
{
|
|
static ino_t previno = (ino_t)-1;
|
|
static int prevtype;
|
|
static long predict;
|
|
long blks, i;
|
|
|
|
if (header->c_type == TS_TAPE) {
|
|
fprintf(stderr, "Volume header (%s inode format) ",
|
|
oldinofmt ? "old" : "new");
|
|
if (header->c_firstrec)
|
|
fprintf(stderr, "begins with record %lld",
|
|
(long long)header->c_firstrec);
|
|
fprintf(stderr, "\n");
|
|
previno = (ino_t)-1;
|
|
return;
|
|
}
|
|
if (previno == (ino_t)-1)
|
|
goto newcalc;
|
|
switch (prevtype) {
|
|
case TS_BITS:
|
|
fprintf(stderr, "Dumped inodes map header");
|
|
break;
|
|
case TS_CLRI:
|
|
fprintf(stderr, "Used inodes map header");
|
|
break;
|
|
case TS_INODE:
|
|
fprintf(stderr, "File header, ino %llu",
|
|
(unsigned long long)previno);
|
|
break;
|
|
case TS_ADDR:
|
|
fprintf(stderr, "File continuation header, ino %llu",
|
|
(unsigned long long)previno);
|
|
break;
|
|
case TS_END:
|
|
fprintf(stderr, "End of tape header");
|
|
break;
|
|
}
|
|
if (predict != blksread - 1)
|
|
fprintf(stderr, "; predicted %ld blocks, got %ld blocks",
|
|
predict, blksread - 1);
|
|
fprintf(stderr, "\n");
|
|
newcalc:
|
|
blks = 0;
|
|
switch (header->c_type) {
|
|
|
|
case TS_BITS:
|
|
case TS_CLRI:
|
|
blks = header->c_count;
|
|
break;
|
|
|
|
case TS_END:
|
|
break;
|
|
|
|
default:
|
|
for (i = 0; i < header->c_count; i++)
|
|
if (header->c_addr[i] != 0)
|
|
blks++;
|
|
}
|
|
predict = blks;
|
|
blksread = 0;
|
|
prevtype = header->c_type;
|
|
previno = header->c_inumber;
|
|
}
|
|
|
|
/*
|
|
* Find an inode header.
|
|
* Complain if had to skip, and complain is set.
|
|
*/
|
|
static void
|
|
findinode(struct s_spcl *header)
|
|
{
|
|
static long skipcnt = 0;
|
|
long i;
|
|
char buf[TP_BSIZE];
|
|
|
|
curfile.name = "<name unknown>";
|
|
curfile.action = UNKNOWN;
|
|
curfile.mode = 0;
|
|
curfile.ino = 0;
|
|
do {
|
|
if (header->c_magic != FS_UFS2_MAGIC) {
|
|
skipcnt++;
|
|
while (gethead(header) == FAIL ||
|
|
header->c_date != dumpdate)
|
|
skipcnt++;
|
|
}
|
|
switch (header->c_type) {
|
|
|
|
case TS_ADDR:
|
|
/*
|
|
* Skip up to the beginning of the next record
|
|
*/
|
|
for (i = 0; i < header->c_count; i++)
|
|
if (header->c_addr[i])
|
|
readtape(buf);
|
|
while (gethead(header) == FAIL ||
|
|
header->c_date != dumpdate)
|
|
skipcnt++;
|
|
break;
|
|
|
|
case TS_INODE:
|
|
curfile.mode = header->c_mode;
|
|
curfile.uid = header->c_uid;
|
|
curfile.gid = header->c_gid;
|
|
curfile.file_flags = header->c_file_flags;
|
|
curfile.rdev = header->c_rdev;
|
|
curfile.atime_sec = header->c_atime;
|
|
curfile.atime_nsec = header->c_atimensec;
|
|
curfile.mtime_sec = header->c_mtime;
|
|
curfile.mtime_nsec = header->c_mtimensec;
|
|
curfile.birthtime_sec = header->c_birthtime;
|
|
curfile.birthtime_nsec = header->c_birthtimensec;
|
|
curfile.size = header->c_size;
|
|
curfile.ino = header->c_inumber;
|
|
break;
|
|
|
|
case TS_END:
|
|
curfile.ino = maxino;
|
|
break;
|
|
|
|
case TS_CLRI:
|
|
curfile.name = "<file removal list>";
|
|
break;
|
|
|
|
case TS_BITS:
|
|
curfile.name = "<file dump list>";
|
|
break;
|
|
|
|
case TS_TAPE:
|
|
panic("unexpected tape header\n");
|
|
/* NOTREACHED */
|
|
|
|
default:
|
|
panic("unknown tape header type %d\n", spcl.c_type);
|
|
/* NOTREACHED */
|
|
|
|
}
|
|
} while (header->c_type == TS_ADDR);
|
|
if (skipcnt > 0)
|
|
fprintf(stderr, "resync restore, skipped %ld blocks\n", skipcnt);
|
|
skipcnt = 0;
|
|
}
|
|
|
|
static int
|
|
checksum(int *buf)
|
|
{
|
|
int i, j;
|
|
|
|
j = sizeof(union u_spcl) / sizeof(int);
|
|
i = 0;
|
|
if (!Bcvt) {
|
|
do
|
|
i += *buf++;
|
|
while (--j);
|
|
} else {
|
|
do
|
|
i += swap32(*buf++);
|
|
while (--j);
|
|
}
|
|
|
|
if (i != CHECKSUM) {
|
|
fprintf(stderr, "Checksum error %o, inode %llu file %s\n", i,
|
|
(unsigned long long)curfile.ino, curfile.name);
|
|
return(FAIL);
|
|
}
|
|
return(GOOD);
|
|
}
|
|
|
|
#ifdef RRESTORE
|
|
#include <stdarg.h>
|
|
|
|
void
|
|
msg(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
(void)vfprintf(stderr, fmt, ap);
|
|
va_end(ap);
|
|
}
|
|
#endif /* RRESTORE */
|
|
|
|
static void
|
|
swap_header(struct s_spcl *s)
|
|
{
|
|
s->c_type = swap32(s->c_type);
|
|
s->c_old_date = swap32(s->c_old_date);
|
|
s->c_old_ddate = swap32(s->c_old_ddate);
|
|
s->c_volume = swap32(s->c_volume);
|
|
s->c_old_tapea = swap32(s->c_old_tapea);
|
|
s->c_inumber = swap32(s->c_inumber);
|
|
s->c_magic = swap32(s->c_magic);
|
|
s->c_checksum = swap32(s->c_checksum);
|
|
|
|
s->c_mode = swap16(s->c_mode);
|
|
s->c_size = swap64(s->c_size);
|
|
s->c_old_atime = swap32(s->c_old_atime);
|
|
s->c_atimensec = swap32(s->c_atimensec);
|
|
s->c_old_mtime = swap32(s->c_old_mtime);
|
|
s->c_mtimensec = swap32(s->c_mtimensec);
|
|
s->c_rdev = swap32(s->c_rdev);
|
|
s->c_birthtimensec = swap32(s->c_birthtimensec);
|
|
s->c_birthtime = swap64(s->c_birthtime);
|
|
s->c_atime = swap64(s->c_atime);
|
|
s->c_mtime = swap64(s->c_mtime);
|
|
s->c_file_flags = swap32(s->c_file_flags);
|
|
s->c_uid = swap32(s->c_uid);
|
|
s->c_gid = swap32(s->c_gid);
|
|
|
|
s->c_count = swap32(s->c_count);
|
|
s->c_level = swap32(s->c_level);
|
|
s->c_flags = swap32(s->c_flags);
|
|
s->c_old_firstrec = swap32(s->c_old_firstrec);
|
|
|
|
s->c_date = swap64(s->c_date);
|
|
s->c_ddate = swap64(s->c_ddate);
|
|
s->c_tapea = swap64(s->c_tapea);
|
|
s->c_firstrec = swap64(s->c_firstrec);
|
|
|
|
/*
|
|
* These are ouid and ogid.
|
|
*/
|
|
s->c_spare1[1] = swap16(s->c_spare1[1]);
|
|
s->c_spare1[2] = swap16(s->c_spare1[2]);
|
|
}
|
|
|
|
static void
|
|
swap_old_header(struct s_ospcl *os)
|
|
{
|
|
os->c_type = swap32(os->c_type);
|
|
os->c_date = swap32(os->c_date);
|
|
os->c_ddate = swap32(os->c_ddate);
|
|
os->c_volume = swap32(os->c_volume);
|
|
os->c_tapea = swap32(os->c_tapea);
|
|
os->c_inumber = swap16(os->c_inumber);
|
|
os->c_magic = swap32(os->c_magic);
|
|
os->c_checksum = swap32(os->c_checksum);
|
|
|
|
os->c_odinode.odi_mode = swap16(os->c_odinode.odi_mode);
|
|
os->c_odinode.odi_nlink = swap16(os->c_odinode.odi_nlink);
|
|
os->c_odinode.odi_uid = swap16(os->c_odinode.odi_uid);
|
|
os->c_odinode.odi_gid = swap16(os->c_odinode.odi_gid);
|
|
|
|
os->c_odinode.odi_size = swap32(os->c_odinode.odi_size);
|
|
os->c_odinode.odi_rdev = swap32(os->c_odinode.odi_rdev);
|
|
os->c_odinode.odi_atime = swap32(os->c_odinode.odi_atime);
|
|
os->c_odinode.odi_mtime = swap32(os->c_odinode.odi_mtime);
|
|
os->c_odinode.odi_ctime = swap32(os->c_odinode.odi_ctime);
|
|
|
|
os->c_count = swap32(os->c_count);
|
|
}
|