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freebsd-skq/sbin/restore/tape.c

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/*
* Copyright (c) 1983, 1993
* The Regents of the University of California. All rights reserved.
* (c) UNIX System Laboratories, Inc.
* All or some portions of this file are derived from material licensed
* to the University of California by American Telephone and Telegraph
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
* the permission of UNIX System Laboratories, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
#if 0
static char sccsid[] = "@(#)tape.c 8.9 (Berkeley) 5/1/95";
#endif
#endif /* not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/file.h>
#include <sys/mtio.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/extattr.h>
#include <sys/acl.h>
#include <ufs/ufs/extattr.h>
#include <ufs/ufs/dinode.h>
#include <protocols/dumprestore.h>
#include <errno.h>
#include <limits.h>
#include <paths.h>
#include <setjmp.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <timeconv.h>
#include <unistd.h>
#include "restore.h"
#include "extern.h"
static long fssize = MAXBSIZE;
static int mt = -1;
static int pipein = 0;
static int pipecmdin = 0;
static FILE *popenfp = NULL;
static char *magtape;
static int blkcnt;
static int numtrec;
static char *tapebuf;
static union u_spcl endoftapemark;
static long byteslide = 0;
static long blksread; /* blocks read since last header */
static int64_t tapeaddr = 0; /* current TP_BSIZE tape record */
static long tapesread;
static jmp_buf restart;
static int gettingfile = 0; /* restart has a valid frame */
static char *host = NULL;
static int readmapflag;
static int ofile;
static char *map;
static char lnkbuf[MAXPATHLEN + 1];
static int pathlen;
int Bcvt; /* Swap Bytes */
int oldinofmt; /* FreeBSD 1 inode format needs cvt */
#define FLUSHTAPEBUF() blkcnt = ntrec + 1
char *namespace_names[] = EXTATTR_NAMESPACE_NAMES;
static void accthdr(struct s_spcl *);
static int checksum(int *);
static void findinode(struct s_spcl *);
static void findtapeblksize(void);
static char *setupextattr(int);
static void xtrattr(char *, long);
static void set_extattr_link(char *, void *, int);
static void set_extattr_fd(int, char *, void *, int);
static int gethead(struct s_spcl *);
static void readtape(char *);
static void setdumpnum(void);
static u_long swabl(u_long);
static u_char *swablong(u_char *, int);
static u_char *swabshort(u_char *, int);
static void terminateinput(void);
static void xtrfile(char *, long);
static void xtrlnkfile(char *, long);
static void xtrlnkskip(char *, long);
static void xtrmap(char *, long);
static void xtrmapskip(char *, long);
static void xtrskip(char *, long);
/*
* Set up an input source
*/
void
setinput(char *source, int ispipecommand)
{
FLUSHTAPEBUF();
if (bflag)
newtapebuf(ntrec);
else
newtapebuf(NTREC > HIGHDENSITYTREC ? NTREC : HIGHDENSITYTREC);
terminal = stdin;
if (ispipecommand)
pipecmdin++;
else
#ifdef RRESTORE
if (strchr(source, ':')) {
host = source;
source = strchr(host, ':');
*source++ = '\0';
if (rmthost(host) == 0)
done(1);
} else
#endif
if (strcmp(source, "-") == 0) {
/*
* Since input is coming from a pipe we must establish
* our own connection to the terminal.
*/
terminal = fopen(_PATH_TTY, "r");
if (terminal == NULL) {
(void)fprintf(stderr, "cannot open %s: %s\n",
_PATH_TTY, strerror(errno));
terminal = fopen(_PATH_DEVNULL, "r");
if (terminal == NULL) {
(void)fprintf(stderr, "cannot open %s: %s\n",
_PATH_DEVNULL, strerror(errno));
done(1);
}
}
pipein++;
}
setuid(getuid()); /* no longer need or want root privileges */
magtape = strdup(source);
if (magtape == NULL) {
fprintf(stderr, "Cannot allocate space for magtape buffer\n");
done(1);
}
}
void
newtapebuf(long size)
{
static int tapebufsize = -1;
ntrec = size;
if (size <= tapebufsize)
return;
if (tapebuf != NULL)
free(tapebuf - TP_BSIZE);
tapebuf = malloc((size+1) * TP_BSIZE);
if (tapebuf == NULL) {
fprintf(stderr, "Cannot allocate space for tape buffer\n");
done(1);
}
tapebuf += TP_BSIZE;
tapebufsize = size;
}
/*
* Verify that the tape drive can be accessed and
* that it actually is a dump tape.
*/
void
setup(void)
{
int i, j, *ip;
struct stat stbuf;
vprintf(stdout, "Verify tape and initialize maps\n");
if (pipecmdin) {
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);
else
#endif
if (pipein)
mt = 0;
else
mt = open(magtape, O_RDONLY, 0);
if (mt < 0) {
fprintf(stderr, "%s: %s\n", magtape, strerror(errno));
done(1);
}
volno = 1;
setdumpnum();
FLUSHTAPEBUF();
if (!pipein && !bflag)
findtapeblksize();
if (gethead(&spcl) == FAIL) {
fprintf(stderr, "Tape is not a dump tape\n");
done(1);
}
if (pipein) {
endoftapemark.s_spcl.c_magic = FS_UFS2_MAGIC;
endoftapemark.s_spcl.c_type = TS_END;
ip = (int *)&endoftapemark;
j = sizeof(union u_spcl) / sizeof(int);
i = 0;
do
i += *ip++;
while (--j);
endoftapemark.s_spcl.c_checksum = CHECKSUM - i;
}
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);
}
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, 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, 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;
int extsize;
struct timeval mtimep[2], ctimep[2];
struct entry *ep;
char *buf;
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;
extsize = curfile.extsize;
uid = getuid();
if (uid == 0)
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;
buf = setupextattr(extsize);
getfile(xtrlnkfile, xtrattr, xtrlnkskip);
if (pathlen == 0) {
vprintf(stdout,
"%s: zero length symbolic link (ignored)\n", name);
return (GOOD);
}
if (linkit(lnkbuf, name, SYMLINK) == GOOD) {
if (extsize > 0)
set_extattr_link(name, buf, extsize);
(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);
}
if (extsize == 0) {
skipfile();
} else {
buf = setupextattr(extsize);
getfile(xtrnull, xtrattr, xtrnull);
set_extattr_file(name, buf, extsize);
}
(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);
}
if (extsize == 0) {
skipfile();
} else {
buf = setupextattr(extsize);
getfile(xtrnull, xtrattr, xtrnull);
set_extattr_file(name, buf, extsize);
}
(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);
}
buf = setupextattr(extsize);
getfile(xtrfile, xtrattr, xtrskip);
if (extsize > 0)
set_extattr_fd(ofile, name, buf, extsize);
(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 */
}
/*
* Set attributes for a file.
*/
void
set_extattr_file(char *name, void *buf, int size)
{
struct extattr *eap, *eaend;
vprintf(stdout, "Set attributes for %s:", name);
eaend = buf + size;
for (eap = buf; eap < eaend; eap = EXTATTR_NEXT(eap)) {
/*
* Make sure this entry is complete.
*/
if (EXTATTR_NEXT(eap) > eaend || eap->ea_length <= 0) {
dprintf(stdout, "\n\t%scorrupted",
eap == buf ? "" : "remainder ");
break;
}
if (eap->ea_namespace == EXTATTR_NAMESPACE_EMPTY)
continue;
vprintf(stdout, "\n\t%s, (%d bytes), %*s",
namespace_names[eap->ea_namespace], eap->ea_length,
eap->ea_namelength, eap->ea_name);
/*
* First we try the general attribute setting interface.
* However, some attributes can only be set by root or
* by using special interfaces (for example, ACLs).
*/
if (extattr_set_file(name, eap->ea_namespace, eap->ea_name,
EXTATTR_CONTENT(eap), EXTATTR_CONTENT_SIZE(eap)) != -1) {
dprintf(stdout, " (set using extattr_set_file)");
continue;
}
/*
* If the general interface refuses to set the attribute,
* then we try all the specialized interfaces that we
* know about.
*/
if (eap->ea_namespace == EXTATTR_NAMESPACE_SYSTEM &&
!strcmp(eap->ea_name, POSIX1E_ACL_ACCESS_EXTATTR_NAME)) {
if (acl_set_file(name, ACL_TYPE_ACCESS,
EXTATTR_CONTENT(eap)) != -1) {
dprintf(stdout, " (set using acl_set_file)");
continue;
}
}
if (eap->ea_namespace == EXTATTR_NAMESPACE_SYSTEM &&
!strcmp(eap->ea_name, POSIX1E_ACL_DEFAULT_EXTATTR_NAME)) {
if (acl_set_file(name, ACL_TYPE_DEFAULT,
EXTATTR_CONTENT(eap)) != -1) {
dprintf(stdout, " (set using acl_set_file)");
continue;
}
}
vprintf(stdout, " (unable to set)");
}
vprintf(stdout, "\n");
}
/*
* Set attributes for a symbolic link.
*/
static void
set_extattr_link(char *name, void *buf, int size)
{
struct extattr *eap, *eaend;
vprintf(stdout, "Set attributes for %s:", name);
eaend = buf + size;
for (eap = buf; eap < eaend; eap = EXTATTR_NEXT(eap)) {
/*
* Make sure this entry is complete.
*/
if (EXTATTR_NEXT(eap) > eaend || eap->ea_length <= 0) {
dprintf(stdout, "\n\t%scorrupted",
eap == buf ? "" : "remainder ");
break;
}
if (eap->ea_namespace == EXTATTR_NAMESPACE_EMPTY)
continue;
vprintf(stdout, "\n\t%s, (%d bytes), %*s",
namespace_names[eap->ea_namespace], eap->ea_length,
eap->ea_namelength, eap->ea_name);
/*
* First we try the general attribute setting interface.
* However, some attributes can only be set by root or
* by using special interfaces (for example, ACLs).
*/
if (extattr_set_link(name, eap->ea_namespace, eap->ea_name,
EXTATTR_CONTENT(eap), EXTATTR_CONTENT_SIZE(eap)) != -1) {
dprintf(stdout, " (set using extattr_set_link)");
continue;
}
/*
* If the general interface refuses to set the attribute,
* then we try all the specialized interfaces that we
* know about.
*/
if (eap->ea_namespace == EXTATTR_NAMESPACE_SYSTEM &&
!strcmp(eap->ea_name, POSIX1E_ACL_ACCESS_EXTATTR_NAME)) {
if (acl_set_link_np(name, ACL_TYPE_ACCESS,
EXTATTR_CONTENT(eap)) != -1) {
dprintf(stdout, " (set using acl_set_link_np)");
continue;
}
}
if (eap->ea_namespace == EXTATTR_NAMESPACE_SYSTEM &&
!strcmp(eap->ea_name, POSIX1E_ACL_DEFAULT_EXTATTR_NAME)) {
if (acl_set_link_np(name, ACL_TYPE_DEFAULT,
EXTATTR_CONTENT(eap)) != -1) {
dprintf(stdout, " (set using acl_set_link_np)");
continue;
}
}
vprintf(stdout, " (unable to set)");
}
vprintf(stdout, "\n");
}
/*
* Set attributes on a file descriptor.
*/
static void
set_extattr_fd(int fd, char *name, void *buf, int size)
{
struct extattr *eap, *eaend;
vprintf(stdout, "Set attributes for %s:", name);
eaend = buf + size;
for (eap = buf; eap < eaend; eap = EXTATTR_NEXT(eap)) {
/*
* Make sure this entry is complete.
*/
if (EXTATTR_NEXT(eap) > eaend || eap->ea_length <= 0) {
dprintf(stdout, "\n\t%scorrupted",
eap == buf ? "" : "remainder ");
break;
}
if (eap->ea_namespace == EXTATTR_NAMESPACE_EMPTY)
continue;
vprintf(stdout, "\n\t%s, (%d bytes), %*s",
namespace_names[eap->ea_namespace], eap->ea_length,
eap->ea_namelength, eap->ea_name);
/*
* First we try the general attribute setting interface.
* However, some attributes can only be set by root or
* by using special interfaces (for example, ACLs).
*/
if (extattr_set_fd(fd, eap->ea_namespace, eap->ea_name,
EXTATTR_CONTENT(eap), EXTATTR_CONTENT_SIZE(eap)) != -1) {
dprintf(stdout, " (set using extattr_set_fd)");
continue;
}
/*
* If the general interface refuses to set the attribute,
* then we try all the specialized interfaces that we
* know about.
*/
if (eap->ea_namespace == EXTATTR_NAMESPACE_SYSTEM &&
!strcmp(eap->ea_name, POSIX1E_ACL_ACCESS_EXTATTR_NAME)) {
if (acl_set_fd(fd, EXTATTR_CONTENT(eap)) != -1) {
dprintf(stdout, " (set using acl_set_fd)");
continue;
}
}
if (eap->ea_namespace == EXTATTR_NAMESPACE_SYSTEM &&
!strcmp(eap->ea_name, POSIX1E_ACL_DEFAULT_EXTATTR_NAME)) {
if (acl_set_file(name, ACL_TYPE_DEFAULT,
EXTATTR_CONTENT(eap)) != -1) {
dprintf(stdout, " (set using acl_set_file)");
continue;
}
}
vprintf(stdout, " (unable to set)");
}
vprintf(stdout, "\n");
}
/*
* 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, 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 (*datafill)(char *, long), void (*attrfill)(char *, long),
void (*skip)(char *, long))
{
int i;
off_t size;
int curblk, attrsize;
void (*fillit)(char *, long);
static char clearedbuf[MAXBSIZE];
char buf[MAXBSIZE / TP_BSIZE][TP_BSIZE];
char junk[TP_BSIZE];
curblk = 0;
size = spcl.c_size;
attrsize = spcl.c_extsize;
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++;
fillit = datafill;
if (size == 0 && attrsize > 0) {
fillit = attrfill;
size = attrsize;
attrsize = 0;
}
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) {
(*fillit)((char *)buf, (long)(size > TP_BSIZE ?
fssize : (curblk - 1) * TP_BSIZE + size));
curblk = 0;
}
} else {
if (curblk > 0) {
(*fillit)((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) {
if (size > -TP_BSIZE && curblk > 0) {
(*fillit)((char *)buf,
(long)((curblk * TP_BSIZE) + size));
curblk = 0;
}
if (attrsize > 0) {
fillit = attrfill;
size = attrsize;
attrsize = 0;
continue;
}
if (spcl.c_count - i > 1)
dprintf(stdout, "skipping %d junk block(s)\n",
spcl.c_count - i - 1);
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)
panic("getfile: lost data\n");
findinode(&spcl);
gettingfile = 0;
}
/*
* These variables are shared between the next two functions.
*/
static int extbufsize = 0;
static char *extbuf;
static int extloc;
/*
* Allocate a buffer into which to extract extended attributes.
*/
static char *
setupextattr(int extsize)
{
extloc = 0;
if (extsize <= extbufsize)
return (extbuf);
if (extbufsize > 0)
free(extbuf);
if ((extbuf = malloc(extsize)) != NULL) {
extbufsize = extsize;
return (extbuf);
}
extbufsize = 0;
extbuf = NULL;
fprintf(stderr, "Cannot extract %d bytes %s for inode %d, name %s\n",
extsize, "of extended attributes", curfile.ino, curfile.name);
return (NULL);
}
/*
* Extract the next block of extended attributes.
*/
static void
xtrattr(char *buf, long size)
{
if (extloc + size > extbufsize)
panic("overrun attribute buffer\n");
memmove(&extbuf[extloc], buf, size);
extloc += size;
}
/*
* 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 (dumpdate != 0 && _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.extsize = header->c_extsize;
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);
}
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