1408 lines
31 KiB
C
1408 lines
31 KiB
C
/*
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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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* 4. 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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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)tape.c 8.9 (Berkeley) 5/1/95";
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#endif
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#endif /* not lint */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/file.h>
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#include <sys/mtio.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <ufs/ufs/dinode.h>
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#include <protocols/dumprestore.h>
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#include <errno.h>
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#include <limits.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 <time.h>
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#include <timeconv.h>
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#include <unistd.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 int pipecmdin = 0;
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static FILE *popenfp = NULL;
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static char *magtape;
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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 int64_t tapeaddr = 0; /* current TP_BSIZE tape record */
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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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static char *host = NULL;
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static int readmapflag;
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static int ofile;
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static char *map;
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static char lnkbuf[MAXPATHLEN + 1];
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static int pathlen;
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int Bcvt; /* Swap Bytes */
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int oldinofmt; /* FreeBSD 1 inode format needs cvt */
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#define FLUSHTAPEBUF() blkcnt = ntrec + 1
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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 u_long swabl(u_long);
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static u_char *swablong(u_char *, int);
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static u_char *swabshort(u_char *, int);
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static void terminateinput(void);
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static void xtrfile(char *, long);
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static void xtrlnkfile(char *, long);
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static void xtrlnkskip(char *, long);
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static void xtrmap(char *, long);
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static void xtrmapskip(char *, long);
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static void xtrskip(char *, long);
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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, int ispipecommand)
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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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newtapebuf(NTREC > HIGHDENSITYTREC ? NTREC : HIGHDENSITYTREC);
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terminal = stdin;
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if (ispipecommand)
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pipecmdin++;
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else
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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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done(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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(void)fprintf(stderr, "cannot open %s: %s\n",
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_PATH_TTY, strerror(errno));
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terminal = fopen(_PATH_DEVNULL, "r");
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if (terminal == NULL) {
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(void)fprintf(stderr, "cannot open %s: %s\n",
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_PATH_DEVNULL, strerror(errno));
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done(1);
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}
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}
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pipein++;
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}
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setuid(getuid()); /* no longer need or want root privileges */
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magtape = strdup(source);
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if (magtape == NULL) {
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fprintf(stderr, "Cannot allocate space for magtape buffer\n");
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done(1);
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}
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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 int tapebufsize = -1;
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ntrec = size;
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if (size <= tapebufsize)
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return;
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if (tapebuf != NULL)
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free(tapebuf);
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tapebuf = malloc(size * TP_BSIZE);
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if (tapebuf == NULL) {
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fprintf(stderr, "Cannot allocate space for tape buffer\n");
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done(1);
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}
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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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if (pipecmdin) {
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if (setenv("RESTORE_VOLUME", "1", 1) == -1) {
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fprintf(stderr, "Cannot set $RESTORE_VOLUME: %s\n",
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strerror(errno));
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done(1);
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}
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popenfp = popen(magtape, "r");
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mt = popenfp ? fileno(popenfp) : -1;
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} else
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#ifdef RRESTORE
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if (host)
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mt = rmtopen(magtape, 0);
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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, 0);
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if (mt < 0) {
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fprintf(stderr, "%s: %s\n", magtape, strerror(errno));
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done(1);
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}
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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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fprintf(stderr, "Tape is not a dump tape\n");
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done(1);
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}
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if (pipein) {
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endoftapemark.s_spcl.c_magic = 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 = _time64_to_time(spcl.c_ddate);
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dumpdate = _time64_to_time(spcl.c_date);
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if (stat(".", &stbuf) < 0) {
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fprintf(stderr, "cannot stat .: %s\n", strerror(errno));
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done(1);
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}
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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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fprintf(stderr, "bad block size %ld\n", fssize);
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done(1);
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}
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if (spcl.c_volume != 1) {
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fprintf(stderr, "Tape is not volume 1 of the dump\n");
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done(1);
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}
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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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fprintf(stderr, "Cannot find file removal list\n");
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done(1);
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}
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maxino = (spcl.c_count * TP_BSIZE * NBBY) + 1;
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dprintf(stdout, "maxino = %d\n", maxino);
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map = calloc((unsigned)1, (unsigned)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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fprintf(stderr, "Cannot find file dump list\n");
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done(1);
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}
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map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
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if (map == (char *)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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* If there may be whiteout entries on the tape, pretend that the
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* whiteout inode exists, so that the whiteout entries can be
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* extracted.
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*/
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SETINO(WINO, dumpmap);
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/* 'r' restores don't call getvol() for tape 1, so mark it as read. */
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if (command == 'r')
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tapesread = 1;
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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 overridden 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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int64_t prevtapea;
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long i, newvol, savecnt;
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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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if (nextvol == 1) {
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tapesread = 0;
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gettingfile = 0;
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}
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prevtapea = tapeaddr;
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savecnt = blksread;
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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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/* Avoid looping if we couldn't ask the user. */
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if (yflag || ferror(terminal) || feof(terminal))
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done(1);
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}
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if (volno == 1)
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return;
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if (pipecmdin) {
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closemt();
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goto getpipecmdhdr;
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}
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goto gethdr;
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}
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again:
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if (pipein)
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done(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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else
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newvol = 0;
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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%s%s",
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"You have not read any tapes yet.\n",
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"If you are extracting just a few files,",
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" start with the last volume\n",
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"and work towards the first; restore",
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" can quickly skip tapes that\n",
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"have no further files to extract.",
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" Otherwise, begin with volume 1.\n");
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} else {
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fprintf(stderr, "You have read volumes");
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strcpy(buf, ": ");
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for (i = 0; i < 32; i++)
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if (tapesread & (1 << i)) {
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fprintf(stderr, "%s%ld", buf, i + 1);
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strcpy(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, BUFSIZ, terminal) == NULL)
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done(1);
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} while (buf[0] == '\n');
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newvol = atoi(buf);
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if (newvol <= 0) {
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fprintf(stderr,
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"Volume numbers are positive numerics\n");
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}
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}
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if (newvol == volno) {
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tapesread |= 1 << (volno - 1);
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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, BUFSIZ, terminal) == NULL)
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done(1);
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if (!strcmp(buf, "none\n")) {
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terminateinput();
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return;
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}
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if (buf[0] != '\n') {
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(void) strcpy(magtape, buf);
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magtape[strlen(magtape) - 1] = '\0';
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}
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if (pipecmdin) {
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char volno[sizeof("2147483647")];
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getpipecmdhdr:
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(void)sprintf(volno, "%d", newvol);
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if (setenv("RESTORE_VOLUME", volno, 1) == -1) {
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fprintf(stderr, "Cannot set $RESTORE_VOLUME: %s\n",
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strerror(errno));
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done(1);
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}
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popenfp = popen(magtape, "r");
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mt = popenfp ? fileno(popenfp) : -1;
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} else
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#ifdef RRESTORE
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if (host)
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mt = rmtopen(magtape, 0);
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else
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#endif
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mt = open(magtape, O_RDONLY, 0);
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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 (%ld)\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 (_time64_to_time(tmpbuf.c_date) != dumpdate ||
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_time64_to_time(tmpbuf.c_ddate) != dumptime) {
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time_t t = _time64_to_time(tmpbuf.c_date);
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fprintf(stderr, "Wrong dump date\n\tgot: %s", ctime(&t));
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fprintf(stderr, "\twanted: %s", ctime(&dumpdate));
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volno = 0;
|
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goto again;
|
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}
|
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tapesread |= 1 << (volno - 1);
|
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blksread = savecnt;
|
|
/*
|
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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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* If coming to this volume at random, skip to the beginning
|
|
* of the next record.
|
|
*/
|
|
dprintf(stdout, "last rec %qd, tape starts with %qd\n", prevtapea,
|
|
tmpbuf.c_tapea);
|
|
if (tmpbuf.c_type == TS_TAPE) {
|
|
if (curfile.action != USING) {
|
|
/*
|
|
* XXX Dump incorrectly sets c_count to 1 in the
|
|
* volume header of the first tape, so ignore
|
|
* c_count when volno == 1.
|
|
*/
|
|
if (volno != 1)
|
|
for (i = tmpbuf.c_count; i > 0; i--)
|
|
readtape(buf);
|
|
} else if (tmpbuf.c_tapea <= prevtapea) {
|
|
/*
|
|
* Normally the value of c_tapea in the volume
|
|
* header is the record number of the header itself.
|
|
* However in the volume header following an EOT-
|
|
* terminated tape, it is the record number of the
|
|
* first continuation data block (dump bug?).
|
|
*
|
|
* The next record we want is `prevtapea + 1'.
|
|
*/
|
|
i = prevtapea + 1 - tmpbuf.c_tapea;
|
|
dprintf(stderr, "Skipping %ld duplicate record%s.\n",
|
|
i, i > 1 ? "s" : "");
|
|
while (--i >= 0)
|
|
readtape(buf);
|
|
}
|
|
}
|
|
if (curfile.action == USING) {
|
|
if (volno == 1)
|
|
panic("active file into volume 1\n");
|
|
return;
|
|
}
|
|
(void) gethead(&spcl);
|
|
findinode(&spcl);
|
|
if (gettingfile) {
|
|
gettingfile = 0;
|
|
longjmp(restart, 1);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Handle unexpected EOF.
|
|
*/
|
|
static void
|
|
terminateinput(void)
|
|
{
|
|
|
|
if (gettingfile && curfile.action == USING) {
|
|
printf("Warning: %s %s\n",
|
|
"End-of-input encountered while extracting", curfile.name);
|
|
}
|
|
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) {
|
|
fprintf(stderr, "Cannot have multiple dumps on pipe input\n");
|
|
done(1);
|
|
}
|
|
tcom.mt_op = MTFSF;
|
|
tcom.mt_count = dumpnum - 1;
|
|
#ifdef RRESTORE
|
|
if (host)
|
|
rmtioctl(MTFSF, dumpnum - 1);
|
|
else
|
|
#endif
|
|
if (!pipecmdin && ioctl(mt, MTIOCTOP, (char *)&tcom) < 0)
|
|
fprintf(stderr, "ioctl MTFSF: %s\n", strerror(errno));
|
|
}
|
|
|
|
void
|
|
printdumpinfo(void)
|
|
{
|
|
time_t t;
|
|
t = _time64_to_time(spcl.c_date);
|
|
fprintf(stdout, "Dump date: %s", ctime(&t));
|
|
t = _time64_to_time(spcl.c_ddate);
|
|
fprintf(stdout, "Dumped from: %s",
|
|
(spcl.c_ddate == 0) ? "the epoch\n" : ctime(&t));
|
|
if (spcl.c_host[0] == '\0')
|
|
return;
|
|
fprintf(stderr, "Level %ld 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)
|
|
{
|
|
int flags;
|
|
mode_t mode;
|
|
struct timeval mtimep[2], ctimep[2];
|
|
struct entry *ep;
|
|
|
|
curfile.name = name;
|
|
curfile.action = USING;
|
|
mtimep[0].tv_sec = curfile.atime_sec;
|
|
mtimep[0].tv_usec = curfile.atime_nsec / 1000;
|
|
mtimep[1].tv_sec = curfile.mtime_sec;
|
|
mtimep[1].tv_usec = curfile.mtime_nsec / 1000;
|
|
ctimep[0].tv_sec = curfile.atime_sec;
|
|
ctimep[0].tv_usec = curfile.atime_nsec / 1000;
|
|
ctimep[1].tv_sec = curfile.birthtime_sec;
|
|
ctimep[1].tv_usec = curfile.birthtime_nsec / 1000;
|
|
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) == GOOD) {
|
|
(void) lchown(name, curfile.uid, curfile.gid);
|
|
(void) lchmod(name, mode);
|
|
(void) lutimes(name, ctimep);
|
|
(void) lutimes(name, mtimep);
|
|
return (GOOD);
|
|
}
|
|
return (FAIL);
|
|
|
|
case IFIFO:
|
|
vprintf(stdout, "extract fifo %s\n", name);
|
|
if (Nflag) {
|
|
skipfile();
|
|
return (GOOD);
|
|
}
|
|
if (uflag && !Nflag)
|
|
(void)unlink(name);
|
|
if (mkfifo(name, mode) < 0) {
|
|
fprintf(stderr, "%s: cannot create fifo: %s\n",
|
|
name, strerror(errno));
|
|
skipfile();
|
|
return (FAIL);
|
|
}
|
|
(void) chown(name, curfile.uid, curfile.gid);
|
|
(void) chmod(name, mode);
|
|
(void) utimes(name, ctimep);
|
|
(void) utimes(name, mtimep);
|
|
(void) chflags(name, flags);
|
|
skipfile();
|
|
return (GOOD);
|
|
|
|
case IFCHR:
|
|
case IFBLK:
|
|
vprintf(stdout, "extract special file %s\n", name);
|
|
if (Nflag) {
|
|
skipfile();
|
|
return (GOOD);
|
|
}
|
|
if (uflag)
|
|
(void)unlink(name);
|
|
if (mknod(name, mode, (int)curfile.rdev) < 0) {
|
|
fprintf(stderr, "%s: cannot create special file: %s\n",
|
|
name, strerror(errno));
|
|
skipfile();
|
|
return (FAIL);
|
|
}
|
|
(void) chown(name, curfile.uid, curfile.gid);
|
|
(void) chmod(name, mode);
|
|
(void) utimes(name, ctimep);
|
|
(void) utimes(name, mtimep);
|
|
(void) chflags(name, flags);
|
|
skipfile();
|
|
return (GOOD);
|
|
|
|
case IFREG:
|
|
vprintf(stdout, "extract file %s\n", name);
|
|
if (Nflag) {
|
|
skipfile();
|
|
return (GOOD);
|
|
}
|
|
if (uflag)
|
|
(void)unlink(name);
|
|
if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC,
|
|
0666)) < 0) {
|
|
fprintf(stderr, "%s: cannot create file: %s\n",
|
|
name, strerror(errno));
|
|
skipfile();
|
|
return (FAIL);
|
|
}
|
|
(void) fchown(ofile, curfile.uid, curfile.gid);
|
|
(void) fchmod(ofile, mode);
|
|
getfile(xtrfile, xtrskip);
|
|
(void) close(ofile);
|
|
(void) utimes(name, ctimep);
|
|
(void) utimes(name, mtimep);
|
|
(void) chflags(name, flags);
|
|
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.
|
|
*/
|
|
void
|
|
getfile(void (*fill)(char *, long), void (*skip)(char *, long))
|
|
{
|
|
int i;
|
|
int curblk = 0;
|
|
quad_t size = spcl.c_size;
|
|
static char clearedbuf[MAXBSIZE];
|
|
char buf[MAXBSIZE / TP_BSIZE][TP_BSIZE];
|
|
char junk[TP_BSIZE];
|
|
|
|
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 (readmapflag || spcl.c_addr[i]) {
|
|
readtape(&buf[curblk++][0]);
|
|
if (curblk == fssize / TP_BSIZE) {
|
|
(*fill)((char *)buf, (long)(size > TP_BSIZE ?
|
|
fssize : (curblk - 1) * TP_BSIZE + size));
|
|
curblk = 0;
|
|
}
|
|
} else {
|
|
if (curblk > 0) {
|
|
(*fill)((char *)buf, (long)(size > TP_BSIZE ?
|
|
curblk * TP_BSIZE :
|
|
(curblk - 1) * TP_BSIZE + size));
|
|
curblk = 0;
|
|
}
|
|
(*skip)(clearedbuf, (long)(size > TP_BSIZE ?
|
|
TP_BSIZE : size));
|
|
}
|
|
if ((size -= TP_BSIZE) <= 0) {
|
|
for (i++; i < spcl.c_count; i++)
|
|
if (readmapflag || 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, (long)((curblk * TP_BSIZE) + size));
|
|
findinode(&spcl);
|
|
gettingfile = 0;
|
|
}
|
|
|
|
/*
|
|
* Write out the next block of a file.
|
|
*/
|
|
static void
|
|
xtrfile(char *buf, long size)
|
|
{
|
|
|
|
if (Nflag)
|
|
return;
|
|
if (write(ofile, buf, (int) size) == -1) {
|
|
fprintf(stderr,
|
|
"write error extracting inode %d, name %s\nwrite: %s\n",
|
|
curfile.ino, curfile.name, strerror(errno));
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Skip over a hole in a file.
|
|
*/
|
|
/* ARGSUSED */
|
|
static void
|
|
xtrskip(char *buf, long size)
|
|
{
|
|
|
|
if (lseek(ofile, size, SEEK_CUR) == -1) {
|
|
fprintf(stderr,
|
|
"seek error extracting inode %d, name %s\nlseek: %s\n",
|
|
curfile.ino, curfile.name, strerror(errno));
|
|
done(1);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Collect the next block of a symbolic link.
|
|
*/
|
|
static void
|
|
xtrlnkfile(char *buf, long size)
|
|
{
|
|
|
|
pathlen += size;
|
|
if (pathlen > MAXPATHLEN) {
|
|
fprintf(stderr, "symbolic link name: %s->%s%s; too long %d\n",
|
|
curfile.name, lnkbuf, buf, pathlen);
|
|
done(1);
|
|
}
|
|
(void) strcat(lnkbuf, buf);
|
|
}
|
|
|
|
/*
|
|
* Skip over a hole in a symbolic link (should never happen).
|
|
*/
|
|
/* ARGSUSED */
|
|
static void
|
|
xtrlnkskip(char *buf, long size)
|
|
{
|
|
|
|
fprintf(stderr, "unallocated block in symbolic link %s\n",
|
|
curfile.name);
|
|
done(1);
|
|
}
|
|
|
|
/*
|
|
* Collect the next block of a bit map.
|
|
*/
|
|
static void
|
|
xtrmap(char *buf, long size)
|
|
{
|
|
|
|
memmove(map, buf, size);
|
|
map += size;
|
|
}
|
|
|
|
/*
|
|
* Skip over a hole in a bit map (should never happen).
|
|
*/
|
|
/* ARGSUSED */
|
|
static void
|
|
xtrmapskip(char *buf, long size)
|
|
{
|
|
|
|
panic("hole in map\n");
|
|
map += size;
|
|
}
|
|
|
|
/*
|
|
* Noop, when an extraction function is not needed.
|
|
*/
|
|
/* ARGSUSED */
|
|
void
|
|
xtrnull(char *buf, long 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) {
|
|
memmove(buf, &tapebuf[(blkcnt++ * TP_BSIZE)], (long)TP_BSIZE);
|
|
blksread++;
|
|
tapeaddr++;
|
|
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 %d\n",
|
|
curfile.ino);
|
|
break;
|
|
}
|
|
if (!yflag && !reply("continue"))
|
|
done(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) {
|
|
fprintf(stderr,
|
|
"continuation failed: %s\n", strerror(errno));
|
|
done(1);
|
|
}
|
|
}
|
|
/*
|
|
* 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: %d should be %d\n",
|
|
rd, ntrec * TP_BSIZE);
|
|
terminateinput();
|
|
memmove(&tapebuf[rd], &endoftapemark, (long)TP_BSIZE);
|
|
}
|
|
blkcnt = 0;
|
|
memmove(buf, &tapebuf[(blkcnt++ * TP_BSIZE)], (long)TP_BSIZE);
|
|
blksread++;
|
|
tapeaddr++;
|
|
}
|
|
|
|
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) {
|
|
fprintf(stderr, "tape read error: %s\n", strerror(errno));
|
|
done(1);
|
|
}
|
|
if (i % TP_BSIZE != 0) {
|
|
fprintf(stderr, "Tape block size (%ld) %s (%d)\n",
|
|
i, "is not a multiple of dump block size", TP_BSIZE);
|
|
done(1);
|
|
}
|
|
ntrec = i / TP_BSIZE;
|
|
numtrec = ntrec;
|
|
vprintf(stdout, "Tape block size is %ld\n", ntrec);
|
|
}
|
|
|
|
void
|
|
closemt(void)
|
|
{
|
|
|
|
if (mt < 0)
|
|
return;
|
|
if (pipecmdin) {
|
|
pclose(popenfp);
|
|
popenfp = NULL;
|
|
} else
|
|
#ifdef RRESTORE
|
|
if (host)
|
|
rmtclose();
|
|
else
|
|
#endif
|
|
(void) close(mt);
|
|
}
|
|
|
|
/*
|
|
* Read the next block from the tape.
|
|
* If it is not any valid header, return an error.
|
|
*/
|
|
static int
|
|
gethead(struct s_spcl *buf)
|
|
{
|
|
long i;
|
|
|
|
readtape((char *)buf);
|
|
if (buf->c_magic != FS_UFS2_MAGIC && buf->c_magic != NFS_MAGIC) {
|
|
if (buf->c_magic == OFS_MAGIC) {
|
|
fprintf(stderr,
|
|
"Format of dump tape is too old. Must use\n");
|
|
fprintf(stderr,
|
|
"a version of restore from before 2002.\n");
|
|
return (FAIL);
|
|
}
|
|
if (swabl(buf->c_magic) != FS_UFS2_MAGIC &&
|
|
buf->c_magic != NFS_MAGIC) {
|
|
if (buf->c_magic == OFS_MAGIC) {
|
|
fprintf(stderr,
|
|
"Format of dump tape is too old. Must use\n");
|
|
fprintf(stderr,
|
|
"a version of restore from before 2002.\n");
|
|
}
|
|
return (FAIL);
|
|
}
|
|
if (!Bcvt) {
|
|
vprintf(stdout, "Note: Doing Byte swapping\n");
|
|
Bcvt = 1;
|
|
}
|
|
}
|
|
if (checksum((int *)buf) == FAIL)
|
|
return (FAIL);
|
|
if (Bcvt) {
|
|
swabst((u_char *)"8l4s1q8l2q17l", (u_char *)buf);
|
|
swabst((u_char *)"l",(u_char *) &buf->c_level);
|
|
swabst((u_char *)"2l4q",(u_char *) &buf->c_flags);
|
|
}
|
|
readmapflag = 0;
|
|
|
|
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;
|
|
if (buf->c_count > TP_NINDIR)
|
|
readmapflag = 1;
|
|
else
|
|
for (i = 0; i < buf->c_count; i++)
|
|
buf->c_addr[i]++;
|
|
break;
|
|
|
|
case TS_TAPE:
|
|
if (buf->c_magic == NFS_MAGIC) {
|
|
if ((buf->c_flags & NFS_DR_NEWINODEFMT) == 0)
|
|
oldinofmt = 1;
|
|
buf->c_date = _time32_to_time(buf->c_old_date);
|
|
buf->c_ddate = _time32_to_time(buf->c_old_ddate);
|
|
buf->c_tapea = buf->c_old_tapea;
|
|
buf->c_firstrec = buf->c_old_firstrec;
|
|
}
|
|
case TS_END:
|
|
buf->c_inumber = 0;
|
|
break;
|
|
|
|
case TS_INODE:
|
|
/*
|
|
* For old dump tapes, have to copy up old fields to
|
|
* new locations.
|
|
*/
|
|
if (buf->c_magic == NFS_MAGIC) {
|
|
buf->c_tapea = buf->c_old_tapea;
|
|
buf->c_firstrec = buf->c_old_firstrec;
|
|
buf->c_date = _time32_to_time(buf->c_old_date);
|
|
buf->c_ddate = _time32_to_time(buf->c_old_ddate);
|
|
buf->c_atime = _time32_to_time(buf->c_old_atime);
|
|
buf->c_mtime = _time32_to_time(buf->c_old_mtime);
|
|
}
|
|
break;
|
|
|
|
case TS_ADDR:
|
|
break;
|
|
|
|
default:
|
|
panic("gethead: unknown inode type %d\n", buf->c_type);
|
|
break;
|
|
}
|
|
/*
|
|
* If we're restoring a filesystem with the old (FreeBSD 1)
|
|
* 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];
|
|
}
|
|
buf->c_magic = FS_UFS2_MAGIC;
|
|
tapeaddr = buf->c_tapea;
|
|
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 = 0x7fffffff;
|
|
static int prevtype;
|
|
static long predict;
|
|
long blks, i;
|
|
|
|
if (header->c_type == TS_TAPE) {
|
|
fprintf(stderr, "Volume header ");
|
|
if (header->c_firstrec)
|
|
fprintf(stderr, "begins with record %qd",
|
|
header->c_firstrec);
|
|
fprintf(stderr, "\n");
|
|
previno = 0x7fffffff;
|
|
return;
|
|
}
|
|
if (previno == 0x7fffffff)
|
|
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 %d", previno);
|
|
break;
|
|
case TS_ADDR:
|
|
fprintf(stderr, "File continuation header, ino %d", 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;
|
|
if (header->c_type != TS_END)
|
|
for (i = 0; i < header->c_count; i++)
|
|
if (readmapflag || 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.
|
|
*/
|
|
static void
|
|
findinode(struct s_spcl *header)
|
|
{
|
|
static long skipcnt = 0;
|
|
long i;
|
|
char buf[TP_BSIZE];
|
|
int htype;
|
|
|
|
curfile.name = "<name unknown>";
|
|
curfile.action = UNKNOWN;
|
|
curfile.mode = 0;
|
|
curfile.ino = 0;
|
|
do {
|
|
htype = header->c_type;
|
|
switch (htype) {
|
|
|
|
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 ||
|
|
_time64_to_time(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:
|
|
/* If we missed some tapes, get another volume. */
|
|
if (tapesread & (tapesread + 1)) {
|
|
getvol(0);
|
|
continue;
|
|
}
|
|
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 (htype == 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 {
|
|
/* What happens if we want to read restore tapes
|
|
for a 16bit int machine??? */
|
|
do
|
|
i += swabl(*buf++);
|
|
while (--j);
|
|
}
|
|
|
|
if (i != CHECKSUM) {
|
|
fprintf(stderr, "Checksum error %o, inode %d file %s\n", i,
|
|
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 u_char *
|
|
swabshort(u_char *sp, int n)
|
|
{
|
|
char c;
|
|
|
|
while (--n >= 0) {
|
|
c = sp[0]; sp[0] = sp[1]; sp[1] = c;
|
|
sp += 2;
|
|
}
|
|
return (sp);
|
|
}
|
|
|
|
static u_char *
|
|
swablong(u_char *sp, int n)
|
|
{
|
|
char c;
|
|
|
|
while (--n >= 0) {
|
|
c = sp[0]; sp[0] = sp[3]; sp[3] = c;
|
|
c = sp[2]; sp[2] = sp[1]; sp[1] = c;
|
|
sp += 4;
|
|
}
|
|
return (sp);
|
|
}
|
|
|
|
static u_char *
|
|
swabquad(u_char *sp, int n)
|
|
{
|
|
char c;
|
|
|
|
while (--n >= 0) {
|
|
c = sp[0]; sp[0] = sp[7]; sp[7] = c;
|
|
c = sp[1]; sp[1] = sp[6]; sp[6] = c;
|
|
c = sp[2]; sp[2] = sp[5]; sp[5] = c;
|
|
c = sp[3]; sp[3] = sp[4]; sp[4] = c;
|
|
sp += 8;
|
|
}
|
|
return (sp);
|
|
}
|
|
|
|
void
|
|
swabst(u_char *cp, u_char *sp)
|
|
{
|
|
int n = 0;
|
|
|
|
while (*cp) {
|
|
switch (*cp) {
|
|
case '0': case '1': case '2': case '3': case '4':
|
|
case '5': case '6': case '7': case '8': case '9':
|
|
n = (n * 10) + (*cp++ - '0');
|
|
continue;
|
|
|
|
case 's': case 'w': case 'h':
|
|
if (n == 0)
|
|
n = 1;
|
|
sp = swabshort(sp, n);
|
|
break;
|
|
|
|
case 'l':
|
|
if (n == 0)
|
|
n = 1;
|
|
sp = swablong(sp, n);
|
|
break;
|
|
|
|
case 'q':
|
|
if (n == 0)
|
|
n = 1;
|
|
sp = swabquad(sp, n);
|
|
break;
|
|
|
|
case 'b':
|
|
if (n == 0)
|
|
n = 1;
|
|
sp += n;
|
|
break;
|
|
|
|
default:
|
|
fprintf(stderr, "Unknown conversion character: %c\n",
|
|
*cp);
|
|
done(0);
|
|
break;
|
|
}
|
|
cp++;
|
|
n = 0;
|
|
}
|
|
}
|
|
|
|
static u_long
|
|
swabl(u_long x)
|
|
{
|
|
swabst((u_char *)"l", (u_char *)&x);
|
|
return (x);
|
|
}
|