12df44b425
makes restore less efficient, but it makes a bigger effore to read corrupted dumps. Specifiacally, when in degreded mode: 1) Restore shifts the input by 1 byte if it sees a problem, rather than one tape block. 2) It doesn't assume the inodes are stored in ascending order. 3) It turns some panics into warning printfs. We also verify some fields more carefully than before. There's probably more a degreded mode could do, but this seems to help a lot. Approved by: imp, iedowse, mckusick MFC after: 3 weeks
1474 lines
33 KiB
C
1474 lines
33 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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|
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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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|
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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 <stdint.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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|
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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 byteslide = 0;
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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 *);
|
|
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
|
|
if (strcmp(source, "-") == 0) {
|
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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");
|
|
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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|
{
|
|
static int tapebufsize = -1;
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|
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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 - TP_BSIZE);
|
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tapebuf = malloc((size+1) * 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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tapebuf += TP_BSIZE;
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|
tapebufsize = size;
|
|
}
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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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|
*/
|
|
void
|
|
setup(void)
|
|
{
|
|
int i, j, *ip;
|
|
struct stat stbuf;
|
|
|
|
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) {
|
|
fprintf(stderr, "Cannot set $RESTORE_VOLUME: %s\n",
|
|
strerror(errno));
|
|
done(1);
|
|
}
|
|
popenfp = popen(magtape, "r");
|
|
mt = popenfp ? fileno(popenfp) : -1;
|
|
} else
|
|
#ifdef RRESTORE
|
|
if (host)
|
|
mt = rmtopen(magtape, 0);
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|
else
|
|
#endif
|
|
if (pipein)
|
|
mt = 0;
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|
else
|
|
mt = open(magtape, O_RDONLY, 0);
|
|
if (mt < 0) {
|
|
fprintf(stderr, "%s: %s\n", magtape, strerror(errno));
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|
done(1);
|
|
}
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|
volno = 1;
|
|
setdumpnum();
|
|
FLUSHTAPEBUF();
|
|
if (!pipein && !bflag)
|
|
findtapeblksize();
|
|
if (gethead(&spcl) == FAIL) {
|
|
fprintf(stderr, "Tape is not a dump tape\n");
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|
done(1);
|
|
}
|
|
if (pipein) {
|
|
endoftapemark.s_spcl.c_magic = FS_UFS2_MAGIC;
|
|
endoftapemark.s_spcl.c_type = TS_END;
|
|
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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|
}
|
|
if (vflag || command == 't')
|
|
printdumpinfo();
|
|
dumptime = _time64_to_time(spcl.c_ddate);
|
|
dumpdate = _time64_to_time(spcl.c_date);
|
|
if (stat(".", &stbuf) < 0) {
|
|
fprintf(stderr, "cannot stat .: %s\n", strerror(errno));
|
|
done(1);
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|
}
|
|
if (stbuf.st_blksize > 0 && stbuf.st_blksize < TP_BSIZE )
|
|
fssize = TP_BSIZE;
|
|
if (stbuf.st_blksize >= TP_BSIZE && stbuf.st_blksize <= MAXBSIZE)
|
|
fssize = stbuf.st_blksize;
|
|
if (((fssize - 1) & fssize) != 0) {
|
|
fprintf(stderr, "bad block size %ld\n", fssize);
|
|
done(1);
|
|
}
|
|
if (spcl.c_volume != 1) {
|
|
fprintf(stderr, "Tape is not volume 1 of the dump\n");
|
|
done(1);
|
|
}
|
|
if (gethead(&spcl) == FAIL) {
|
|
dprintf(stdout, "header read failed at %ld blocks\n", blksread);
|
|
panic("no header after volume mark!\n");
|
|
}
|
|
findinode(&spcl);
|
|
if (spcl.c_type != TS_CLRI) {
|
|
fprintf(stderr, "Cannot find file removal list\n");
|
|
done(1);
|
|
}
|
|
maxino = (spcl.c_count * TP_BSIZE * NBBY) + 1;
|
|
dprintf(stdout, "maxino = %d\n", maxino);
|
|
map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
|
|
if (map == NULL)
|
|
panic("no memory for active inode map\n");
|
|
usedinomap = map;
|
|
curfile.action = USING;
|
|
getfile(xtrmap, xtrmapskip);
|
|
if (spcl.c_type != TS_BITS) {
|
|
fprintf(stderr, "Cannot find file dump list\n");
|
|
done(1);
|
|
}
|
|
map = calloc((unsigned)1, (unsigned)howmany(maxino, NBBY));
|
|
if (map == (char *)NULL)
|
|
panic("no memory for file dump list\n");
|
|
dumpmap = map;
|
|
curfile.action = USING;
|
|
getfile(xtrmap, xtrmapskip);
|
|
/*
|
|
* If there may be whiteout entries on the tape, pretend that the
|
|
* whiteout inode exists, so that the whiteout entries can be
|
|
* extracted.
|
|
*/
|
|
SETINO(WINO, dumpmap);
|
|
/* 'r' restores don't call getvol() for tape 1, so mark it as read. */
|
|
if (command == 'r')
|
|
tapesread = 1;
|
|
}
|
|
|
|
/*
|
|
* Prompt user to load a new dump volume.
|
|
* "Nextvol" is the next suggested volume to use.
|
|
* This suggested volume is enforced when doing full
|
|
* or incremental restores, but can be overridden by
|
|
* the user when only extracting a subset of the files.
|
|
*/
|
|
void
|
|
getvol(long nextvol)
|
|
{
|
|
int64_t prevtapea;
|
|
long i, newvol, savecnt;
|
|
union u_spcl tmpspcl;
|
|
# define tmpbuf tmpspcl.s_spcl
|
|
char buf[TP_BSIZE];
|
|
|
|
if (nextvol == 1) {
|
|
tapesread = 0;
|
|
gettingfile = 0;
|
|
}
|
|
prevtapea = tapeaddr;
|
|
savecnt = blksread;
|
|
if (pipein) {
|
|
if (nextvol != 1) {
|
|
panic("Changing volumes on pipe input?\n");
|
|
/* Avoid looping if we couldn't ask the user. */
|
|
if (yflag || ferror(terminal) || feof(terminal))
|
|
done(1);
|
|
}
|
|
if (volno == 1)
|
|
return;
|
|
if (pipecmdin) {
|
|
closemt();
|
|
goto getpipecmdhdr;
|
|
}
|
|
goto gethdr;
|
|
}
|
|
again:
|
|
if (pipein)
|
|
done(1); /* pipes do not get a second chance */
|
|
if (command == 'R' || command == 'r' || curfile.action != SKIP)
|
|
newvol = nextvol;
|
|
else
|
|
newvol = 0;
|
|
while (newvol <= 0) {
|
|
if (tapesread == 0) {
|
|
fprintf(stderr, "%s%s%s%s%s%s%s",
|
|
"You have not read any tapes yet.\n",
|
|
"If you are extracting just a few files,",
|
|
" start with the last volume\n",
|
|
"and work towards the first; restore",
|
|
" can quickly skip tapes that\n",
|
|
"have no further files to extract.",
|
|
" Otherwise, begin with volume 1.\n");
|
|
} else {
|
|
fprintf(stderr, "You have read volumes");
|
|
strcpy(buf, ": ");
|
|
for (i = 0; i < 32; i++)
|
|
if (tapesread & (1 << i)) {
|
|
fprintf(stderr, "%s%ld", buf, i + 1);
|
|
strcpy(buf, ", ");
|
|
}
|
|
fprintf(stderr, "\n");
|
|
}
|
|
do {
|
|
fprintf(stderr, "Specify next volume #: ");
|
|
(void) fflush(stderr);
|
|
if (fgets(buf, BUFSIZ, terminal) == NULL)
|
|
done(1);
|
|
} while (buf[0] == '\n');
|
|
newvol = atoi(buf);
|
|
if (newvol <= 0) {
|
|
fprintf(stderr,
|
|
"Volume numbers are positive numerics\n");
|
|
}
|
|
}
|
|
if (newvol == volno) {
|
|
tapesread |= 1 << (volno - 1);
|
|
return;
|
|
}
|
|
closemt();
|
|
fprintf(stderr, "Mount tape volume %ld\n", newvol);
|
|
fprintf(stderr, "Enter ``none'' if there are no more tapes\n");
|
|
fprintf(stderr, "otherwise enter tape name (default: %s) ", magtape);
|
|
(void) fflush(stderr);
|
|
if (fgets(buf, BUFSIZ, terminal) == NULL)
|
|
done(1);
|
|
if (!strcmp(buf, "none\n")) {
|
|
terminateinput();
|
|
return;
|
|
}
|
|
if (buf[0] != '\n') {
|
|
(void) strcpy(magtape, buf);
|
|
magtape[strlen(magtape) - 1] = '\0';
|
|
}
|
|
if (pipecmdin) {
|
|
char volno[sizeof("2147483647")];
|
|
|
|
getpipecmdhdr:
|
|
(void)sprintf(volno, "%d", newvol);
|
|
if (setenv("RESTORE_VOLUME", volno, 1) == -1) {
|
|
fprintf(stderr, "Cannot set $RESTORE_VOLUME: %s\n",
|
|
strerror(errno));
|
|
done(1);
|
|
}
|
|
popenfp = popen(magtape, "r");
|
|
mt = popenfp ? fileno(popenfp) : -1;
|
|
} else
|
|
#ifdef RRESTORE
|
|
if (host)
|
|
mt = rmtopen(magtape, 0);
|
|
else
|
|
#endif
|
|
mt = open(magtape, O_RDONLY, 0);
|
|
|
|
if (mt == -1) {
|
|
fprintf(stderr, "Cannot open %s\n", magtape);
|
|
volno = -1;
|
|
goto again;
|
|
}
|
|
gethdr:
|
|
volno = newvol;
|
|
setdumpnum();
|
|
FLUSHTAPEBUF();
|
|
if (gethead(&tmpbuf) == FAIL) {
|
|
dprintf(stdout, "header read failed at %ld blocks\n", blksread);
|
|
fprintf(stderr, "tape is not dump tape\n");
|
|
volno = 0;
|
|
goto again;
|
|
}
|
|
if (tmpbuf.c_volume != volno) {
|
|
fprintf(stderr, "Wrong volume (%ld)\n", tmpbuf.c_volume);
|
|
volno = 0;
|
|
goto again;
|
|
}
|
|
if (_time64_to_time(tmpbuf.c_date) != dumpdate ||
|
|
_time64_to_time(tmpbuf.c_ddate) != dumptime) {
|
|
time_t t = _time64_to_time(tmpbuf.c_date);
|
|
fprintf(stderr, "Wrong dump date\n\tgot: %s", ctime(&t));
|
|
fprintf(stderr, "\twanted: %s", ctime(&dumpdate));
|
|
volno = 0;
|
|
goto again;
|
|
}
|
|
tapesread |= 1 << (volno - 1);
|
|
blksread = savecnt;
|
|
/*
|
|
* If continuing from the previous volume, skip over any
|
|
* blocks read already at the end of the previous volume.
|
|
*
|
|
* 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;
|
|
uid_t uid;
|
|
gid_t gid;
|
|
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;
|
|
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) == GOOD) {
|
|
(void) lchown(name, uid, gid);
|
|
(void) lchmod(name, mode);
|
|
(void) lutimes(name, ctimep);
|
|
(void) lutimes(name, mtimep);
|
|
(void) lchflags(name, flags);
|
|
return (GOOD);
|
|
}
|
|
return (FAIL);
|
|
|
|
case IFIFO:
|
|
vprintf(stdout, "extract fifo %s\n", name);
|
|
if (Nflag) {
|
|
skipfile();
|
|
return (GOOD);
|
|
}
|
|
if (uflag)
|
|
(void) unlink(name);
|
|
if (mkfifo(name, 0600) < 0) {
|
|
fprintf(stderr, "%s: cannot create fifo: %s\n",
|
|
name, strerror(errno));
|
|
skipfile();
|
|
return (FAIL);
|
|
}
|
|
skipfile();
|
|
(void) chown(name, uid, gid);
|
|
(void) chmod(name, mode);
|
|
(void) utimes(name, ctimep);
|
|
(void) utimes(name, mtimep);
|
|
(void) chflags(name, flags);
|
|
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 & (IFCHR | IFBLK)) | 0600,
|
|
(int)curfile.rdev) < 0) {
|
|
fprintf(stderr, "%s: cannot create special file: %s\n",
|
|
name, strerror(errno));
|
|
skipfile();
|
|
return (FAIL);
|
|
}
|
|
skipfile();
|
|
(void) chown(name, uid, gid);
|
|
(void) chmod(name, mode);
|
|
(void) utimes(name, ctimep);
|
|
(void) utimes(name, mtimep);
|
|
(void) chflags(name, flags);
|
|
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,
|
|
0600)) < 0) {
|
|
fprintf(stderr, "%s: cannot create file: %s\n",
|
|
name, strerror(errno));
|
|
skipfile();
|
|
return (FAIL);
|
|
}
|
|
getfile(xtrfile, xtrskip);
|
|
(void) fchown(ofile, uid, gid);
|
|
(void) fchmod(ofile, mode);
|
|
(void) futimes(ofile, ctimep);
|
|
(void) futimes(ofile, mtimep);
|
|
(void) fchflags(ofile, flags);
|
|
(void) close(ofile);
|
|
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 && i > TP_NINDIR) {
|
|
if (Dflag) {
|
|
fprintf(stderr, "spcl.c_count = %jd\n",
|
|
(intmax_t)spcl.c_count);
|
|
break;
|
|
} else
|
|
panic("spcl.c_count = %jd\n",
|
|
(intmax_t)spcl.c_count);
|
|
}
|
|
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 && i > TP_NINDIR) {
|
|
if (Dflag) {
|
|
fprintf(stderr,
|
|
"spcl.c_count = %jd\n",
|
|
(intmax_t)spcl.c_count);
|
|
break;
|
|
} else
|
|
panic("spcl.c_count = %jd\n",
|
|
(intmax_t)spcl.c_count);
|
|
}
|
|
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, oldnumtrec;
|
|
int cnt, seek_failed;
|
|
|
|
if (blkcnt + (byteslide > 0) < numtrec) {
|
|
memmove(buf, &tapebuf[(blkcnt++ * TP_BSIZE) + byteslide], (long)TP_BSIZE);
|
|
blksread++;
|
|
tapeaddr++;
|
|
return;
|
|
}
|
|
if (numtrec > 0)
|
|
memmove(&tapebuf[-TP_BSIZE],
|
|
&tapebuf[(numtrec-1) * TP_BSIZE], (long)TP_BSIZE);
|
|
oldnumtrec = numtrec;
|
|
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);
|
|
}
|
|
if (oldnumtrec == 0)
|
|
blkcnt = 0;
|
|
else
|
|
blkcnt -= oldnumtrec;
|
|
memmove(buf,
|
|
&tapebuf[(blkcnt++ * TP_BSIZE) + byteslide], (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 (_time64_to_time(buf->c_date) != dumpdate)
|
|
fprintf(stderr, "Header with wrong dumpdate.\n");
|
|
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++;
|
|
if (Dflag) {
|
|
byteslide++;
|
|
if (byteslide < TP_BSIZE) {
|
|
blkcnt--;
|
|
blksread--;
|
|
} else
|
|
byteslide = 0;
|
|
}
|
|
}
|
|
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:
|
|
if (Dflag)
|
|
fprintf(stderr, "unexpected tape header\n");
|
|
else
|
|
panic("unexpected tape header\n");
|
|
|
|
default:
|
|
if (Dflag)
|
|
fprintf(stderr, "unknown tape header type %d\n",
|
|
spcl.c_type);
|
|
else
|
|
panic("unknown tape header type %d\n",
|
|
spcl.c_type);
|
|
while (gethead(header) == FAIL ||
|
|
_time64_to_time(header->c_date) != dumpdate) {
|
|
skipcnt++;
|
|
if (Dflag) {
|
|
byteslide++;
|
|
if (byteslide < TP_BSIZE) {
|
|
blkcnt--;
|
|
blksread--;
|
|
} else
|
|
byteslide = 0;
|
|
}
|
|
}
|
|
|
|
}
|
|
} while (htype == TS_ADDR);
|
|
if (skipcnt > 0)
|
|
fprintf(stderr, "resync restore, skipped %ld %s\n",
|
|
skipcnt, Dflag ? "bytes" : "blocks");
|
|
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);
|
|
}
|