/*
* Extract a file from the tape.
* When an allocated block is found it is passed to the fill function;
* when an unallocated block (hole) is found, a zeroed buffer is passed
* to the skip function.
*
* For some block types (TS_BITS, TS_CLRI), the c_addr map is not meaningful
* and no blocks should be skipped.
*/
void
getfile(void (*fill)(char *, size_t), void (*skip)(char *, size_t))
{
int i;
volatile int curblk = 0;
volatile off_t size = spcl.c_size;
static char clearedbuf[MAXBSIZE];
char buf[MAXBSIZE / TP_BSIZE][TP_BSIZE];
char junk[TP_BSIZE];
volatile int noskip = (spcl.c_type == TS_BITS || spcl.c_type == TS_CLRI);
if (spcl.c_type == TS_END)
panic("ran off end of tape\n");
if (spcl.c_magic != FS_UFS2_MAGIC)
panic("not at beginning of a file\n");
if (!gettingfile && setjmp(restart) != 0)
return;
gettingfile++;
loop:
for (i = 0; i < spcl.c_count; i++) {
if (noskip || spcl.c_addr[i]) {
readtape(&buf[curblk++][0]);
if (curblk == fssize / TP_BSIZE) {
(*fill)((char *)buf, size > TP_BSIZE ?
fssize :
((off_t)curblk - 1) * TP_BSIZE + size);
curblk = 0;
}
} else {
if (curblk > 0) {
(*fill)((char *)buf, size > TP_BSIZE ?
(curblk * TP_BSIZE) :
((off_t)curblk - 1) * TP_BSIZE + size);
curblk = 0;
}
(*skip)(clearedbuf, size > TP_BSIZE ?
TP_BSIZE : size);
}
if ((size -= TP_BSIZE) <= 0) {
for (i++; i < spcl.c_count; i++)
if (noskip || spcl.c_addr[i])
readtape(junk);
break;
}
}
if (gethead(&spcl) == GOOD && size > 0) {
if (spcl.c_type == TS_ADDR)
goto loop;
Dprintf(stdout,
"Missing address (header) block for %s at %ld blocks\n",
curfile.name, blksread);
}
if (curblk > 0)
(*fill)((char *)buf, ((off_t)curblk * TP_BSIZE) + size);
findinode(&spcl);
gettingfile = 0;
}
/*
* 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;
}
/*
* 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;
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")];
(void)sprintf(volno, "%ld", 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 (%jd)\n",
(intmax_t)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 %jd, tape starts with %jd\n",
(intmax_t)prevtapea, (intmax_t)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);
}
}
/*
* 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;
}
/*
* 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_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]++;
/* FALL THROUGH */
case TS_TAPE:
if (buf->c_magic == NFS_MAGIC &&
(buf->c_flags & NFS_DR_NEWINODEFMT) == 0)
oldinofmt = 1;
/* FALL THROUGH */
case TS_END:
buf->c_inumber = 0;
/* FALL THROUGH */
case TS_ADDR:
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);
buf->c_birthtime = 0;
buf->c_birthtimensec = 0;
buf->c_extsize = 0;
}
break;
default:
panic("gethead: unknown inode type %d\n", buf->c_type);
break;
}
if (dumpdate != 0 && _time64_to_time(buf->c_date) != dumpdate)
fprintf(stderr, "Header with wrong dumpdate.\n");
/*
* 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);
}
/*
* 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 && !pipecmdin && numtrec < ntrec && i > 0) {
dprintf(stdout, "mid-media short read error.\n");
numtrec = ntrec;
}
/*
* Handle partial block read.
*/
if ((pipein || pipecmdin) && i == 0 && rd > 0)
i = rd;
else if (i > 0 && i != ntrec * TP_BSIZE) {
if (pipein || pipecmdin) {
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 %ju\n",
(uintmax_t)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: %ld should be %ld\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++;
}
/*
* Read the next block from the tape.
* Check to see if it is one of several vintage headers.
* If it is an old style header, convert it to a new style header.
* If it is not any valid header, return an error.
*/
static int
gethead(struct s_spcl *buf)
{
union u_ospcl u_ospcl;
if (!cvtflag) {
readtape((char *)buf);
if (buf->c_magic != NFS_MAGIC &&
buf->c_magic != FS_UFS2_MAGIC) {
if (swap32(buf->c_magic) != NFS_MAGIC &&
swap32(buf->c_magic) != FS_UFS2_MAGIC)
return (FAIL);
if (!Bcvt) {
Vprintf(stdout, "Note: Doing Byte swapping\n");
Bcvt = 1;
}
}
if (checksum((int *)buf) == FAIL)
return (FAIL);
if (Bcvt)
swap_header(buf);
goto good;
}
readtape((char *)(&u_ospcl.s_ospcl));
if (checksum((int *)(&u_ospcl.s_ospcl)) == FAIL)
return (FAIL);
if (u_ospcl.s_ospcl.c_magic != OFS_MAGIC) {
if (swap32(u_ospcl.s_ospcl.c_magic) != OFS_MAGIC)
return (FAIL);
if (!Bcvt) {
fprintf(stdout, "Note: Doing Byte swapping\n");
Bcvt = 1;
}
swap_old_header(&u_ospcl.s_ospcl);
}
memset(buf, 0, TP_BSIZE);
buf->c_type = u_ospcl.s_ospcl.c_type;
buf->c_date = u_ospcl.s_ospcl.c_date;
buf->c_ddate = u_ospcl.s_ospcl.c_ddate;
buf->c_volume = u_ospcl.s_ospcl.c_volume;
buf->c_tapea = u_ospcl.s_ospcl.c_tapea;
buf->c_inumber = u_ospcl.s_ospcl.c_inumber;
buf->c_checksum = u_ospcl.s_ospcl.c_checksum;
buf->c_mode = u_ospcl.s_ospcl.c_odinode.odi_mode;
buf->c_uid = u_ospcl.s_ospcl.c_odinode.odi_uid;
buf->c_gid = u_ospcl.s_ospcl.c_odinode.odi_gid;
buf->c_size = u_ospcl.s_ospcl.c_odinode.odi_size;
buf->c_rdev = u_ospcl.s_ospcl.c_odinode.odi_rdev;
buf->c_atime = u_ospcl.s_ospcl.c_odinode.odi_atime;
buf->c_mtime = u_ospcl.s_ospcl.c_odinode.odi_mtime;
buf->c_count = u_ospcl.s_ospcl.c_count;
memcpy(buf->c_addr, u_ospcl.s_ospcl.c_addr, 256);
buf->c_magic = FS_UFS2_MAGIC;
good:
switch (buf->c_type) {
case TS_CLRI:
case TS_BITS:
/*
* Have to patch up missing information in bit map headers
*/
buf->c_inumber = 0;
buf->c_size = buf->c_count * TP_BSIZE;
break;
case TS_TAPE:
if ((buf->c_flags & DR_NEWINODEFMT) == 0)
oldinofmt = 1;
/* fall through */
case TS_END:
buf->c_inumber = 0;
break;
case TS_INODE:
if (buf->c_magic == NFS_MAGIC) {
buf->c_tapea = buf->c_old_tapea;
buf->c_firstrec = buf->c_old_firstrec;
buf->c_date = buf->c_old_date;
buf->c_ddate = buf->c_old_ddate;
buf->c_atime = buf->c_old_atime;
buf->c_mtime = buf->c_old_mtime;
buf->c_birthtime = 0;
buf->c_birthtimensec = 0;
buf->c_atimensec = buf->c_mtimensec = 0;
}
case TS_ADDR:
break;
default:
panic("gethead: unknown inode type %d\n", buf->c_type);
break;
}
buf->c_magic = FS_UFS2_MAGIC;
/*
* If we are restoring a filesystem with old format inodes,
* copy the uid/gid to the new location.
*/
if (oldinofmt) {
buf->c_uid = buf->c_spare1[1];
buf->c_gid = buf->c_spare1[2];
}
if (dflag)
accthdr(buf);
return(GOOD);
}
/*
* 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 overrridden by
* the user when only extracting a subset of the files.
*/
void
getvol(long nextvol)
{
long newvol = 0, savecnt = 0, wantnext = 0, i;
union u_spcl tmpspcl;
# define tmpbuf tmpspcl.s_spcl
char buf[TP_BSIZE];
const char *errstr;
if (nextvol == 1) {
tapesread = 0;
gettingfile = 0;
}
if (pipein) {
if (nextvol != 1)
panic("Changing volumes on pipe input?\n");
if (volno == 1)
return;
goto gethdr;
}
savecnt = blksread;
again:
if (pipein)
exit(1); /* pipes do not get a second chance */
if (command == 'R' || command == 'r' || curfile.action != SKIP) {
newvol = nextvol;
wantnext = 1;
} else {
newvol = 0;
wantnext = 0;
}
while (newvol <= 0) {
if (tapesread == 0) {
fprintf(stderr, "%s%s%s%s%s",
"You have not read any tapes yet.\n",
"Unless you know which volume your",
" file(s) are on you should start\n",
"with the last volume and work",
" towards the first.\n");
} else {
fprintf(stderr, "You have read volumes");
strlcpy(buf, ": ", sizeof buf);
for (i = 1; i < 32; i++)
if (tapesread & (1 << i)) {
fprintf(stderr, "%s%ld", buf, i);
strlcpy(buf, ", ", sizeof buf);
}
fprintf(stderr, "\n");
}
do {
fprintf(stderr, "Specify next volume #: ");
(void)fflush(stderr);
if (fgets(buf, sizeof buf, terminal) == NULL)
exit(1);
buf[strcspn(buf, "\n")] = '\0';
newvol = strtonum(buf, 1, INT_MAX, &errstr);
if (errstr)
fprintf(stderr, "Volume number %s: %s\n", errstr, buf);
} while (errstr);
}
if (newvol == volno) {
tapesread |= 1 << volno;
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, sizeof buf, terminal) == NULL || feof(terminal))
exit(1);
buf[strcspn(buf, "\n")] = '\0';
if (strcmp(buf, "none") == 0) {
terminateinput();
return;
}
if (buf[0] != '\0')
(void)strlcpy(magtape, buf, sizeof magtape);
#ifdef RRESTORE
if (host)
mt = rmtopen(magtape, 0);
else
#endif
mt = open(magtape, O_RDONLY);
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 (%d)\n", tmpbuf.c_volume);
volno = 0;
goto again;
}
if (tmpbuf.c_date != dumpdate || tmpbuf.c_ddate != dumptime) {
time_t t = (time_t)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;
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, "read %ld recs, tape starts with %lld\n",
tpblksread, tmpbuf.c_firstrec);
if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER)) {
if (!wantnext) {
tpblksread = tmpbuf.c_firstrec;
for (i = tmpbuf.c_count; i > 0; i--)
readtape(buf);
} else if (tmpbuf.c_firstrec > 0 &&
tmpbuf.c_firstrec < tpblksread - 1) {
/*
* -1 since we've read the volume header
*/
i = tpblksread - tmpbuf.c_firstrec - 1;
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;
}
/*
* Skip up to the beginning of the next record
*/
if (tmpbuf.c_type == TS_TAPE && (tmpbuf.c_flags & DR_NEWHEADER))
for (i = tmpbuf.c_count; i > 0; i--)
readtape(buf);
(void)gethead(&spcl);
findinode(&spcl);
if (gettingfile) {
gettingfile = 0;
longjmp(restart, 1);
}
}
/*
* Find an inode header.
* Complain if had to skip, and complain is set.
*/
static void
findinode(struct s_spcl *header)
{
static long skipcnt = 0;
long i;
char buf[TP_BSIZE];
curfile.name = "<name unknown>";
curfile.action = UNKNOWN;
curfile.mode = 0;
curfile.ino = 0;
do {
if (header->c_magic != FS_UFS2_MAGIC) {
skipcnt++;
while (gethead(header) == FAIL ||
header->c_date != dumpdate)
skipcnt++;
}
switch (header->c_type) {
case TS_ADDR:
/*
* Skip up to the beginning of the next record
*/
for (i = 0; i < header->c_count; i++)
if (header->c_addr[i])
readtape(buf);
while (gethead(header) == FAIL ||
header->c_date != dumpdate)
skipcnt++;
break;
case TS_INODE:
curfile.mode = header->c_mode;
curfile.uid = header->c_uid;
curfile.gid = header->c_gid;
curfile.file_flags = header->c_file_flags;
curfile.rdev = header->c_rdev;
curfile.atime_sec = header->c_atime;
curfile.atime_nsec = header->c_atimensec;
curfile.mtime_sec = header->c_mtime;
curfile.mtime_nsec = header->c_mtimensec;
curfile.birthtime_sec = header->c_birthtime;
curfile.birthtime_nsec = header->c_birthtimensec;
curfile.size = header->c_size;
curfile.ino = header->c_inumber;
break;
case TS_END:
curfile.ino = maxino;
break;
case TS_CLRI:
curfile.name = "<file removal list>";
break;
case TS_BITS:
curfile.name = "<file dump list>";
break;
case TS_TAPE:
panic("unexpected tape header\n");
/* NOTREACHED */
default:
panic("unknown tape header type %d\n", spcl.c_type);
/* NOTREACHED */
}
} while (header->c_type == TS_ADDR);
if (skipcnt > 0)
fprintf(stderr, "resync restore, skipped %ld blocks\n", skipcnt);
skipcnt = 0;
}
/*
* 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 *, size_t), void (*attrfill)(char *, size_t),
void (*skip)(char *, size_t))
{
int i;
volatile off_t size;
size_t seekpos;
int curblk, attrsize;
void (*fillit)(char *, size_t);
char buf[MAXBSIZE / TP_BSIZE][TP_BSIZE];
char junk[TP_BSIZE];
curblk = 0;
size = spcl.c_size;
seekpos = 0;
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) {
skiphole(skip, &seekpos);
(*fillit)((char *)buf, (long)(size > TP_BSIZE ?
fssize : (curblk - 1) * TP_BSIZE + size));
curblk = 0;
}
} else {
if (curblk > 0) {
skiphole(skip, &seekpos);
(*fillit)((char *)buf, (long)(size > TP_BSIZE ?
curblk * TP_BSIZE :
(curblk - 1) * TP_BSIZE + size));
curblk = 0;
}
/*
* We have a block of a hole. Don't skip it
* now, because there may be next adjacent
* block of the hole in the file. Postpone the
* seek until next file write.
*/
seekpos += (long)MIN(TP_BSIZE, size);
}
if ((size -= TP_BSIZE) <= 0) {
if (size > -TP_BSIZE && curblk > 0) {
skiphole(skip, &seekpos);
(*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;
}
/*
* Read the next block from the tape.
* Check to see if it is one of several vintage headers.
* If it is an old style header, convert it to a new style header.
* If it is not any valid header, return an error.
*/
static int
gethead(struct s_spcl *buf)
{
long i;
union {
quad_t qval;
int32_t val[2];
} qcvt;
union u_ospcl {
char dummy[TP_BSIZE];
struct s_ospcl {
int32_t c_type;
int32_t c_date;
int32_t c_ddate;
int32_t c_volume;
int32_t c_tapea;
u_short c_inumber;
int32_t c_magic;
int32_t c_checksum;
struct odinode {
unsigned short odi_mode;
u_short odi_nlink;
u_short odi_uid;
u_short odi_gid;
int32_t odi_size;
int32_t odi_rdev;
char odi_addr[36];
int32_t odi_atime;
int32_t odi_mtime;
int32_t odi_ctime;
} c_dinode;
int32_t c_count;
char c_addr[256];
} s_ospcl;
} u_ospcl;
if (!cvtflag) {
readtape((char *)buf);
if (buf->c_magic != NFS_MAGIC) {
if (swabl(buf->c_magic) != NFS_MAGIC)
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 *)"8l4s31l", (u_char *)buf);
swabst((u_char *)"l",(u_char *) &buf->c_level);
swabst((u_char *)"2l",(u_char *) &buf->c_flags);
}
goto good;
}
readtape((char *)(&u_ospcl.s_ospcl));
memset(buf, 0, (long)TP_BSIZE);
buf->c_type = u_ospcl.s_ospcl.c_type;
buf->c_date = u_ospcl.s_ospcl.c_date;
buf->c_ddate = u_ospcl.s_ospcl.c_ddate;
buf->c_volume = u_ospcl.s_ospcl.c_volume;
buf->c_tapea = u_ospcl.s_ospcl.c_tapea;
buf->c_inumber = u_ospcl.s_ospcl.c_inumber;
buf->c_checksum = u_ospcl.s_ospcl.c_checksum;
buf->c_magic = u_ospcl.s_ospcl.c_magic;
buf->c_dinode.di_mode = u_ospcl.s_ospcl.c_dinode.odi_mode;
buf->c_dinode.di_nlink = u_ospcl.s_ospcl.c_dinode.odi_nlink;
buf->c_dinode.di_uid = u_ospcl.s_ospcl.c_dinode.odi_uid;
buf->c_dinode.di_gid = u_ospcl.s_ospcl.c_dinode.odi_gid;
buf->c_dinode.di_size = u_ospcl.s_ospcl.c_dinode.odi_size;
buf->c_dinode.di_rdev = u_ospcl.s_ospcl.c_dinode.odi_rdev;
buf->c_dinode.di_atime = u_ospcl.s_ospcl.c_dinode.odi_atime;
buf->c_dinode.di_mtime = u_ospcl.s_ospcl.c_dinode.odi_mtime;
buf->c_dinode.di_ctime = u_ospcl.s_ospcl.c_dinode.odi_ctime;
buf->c_count = u_ospcl.s_ospcl.c_count;
memmove(buf->c_addr, u_ospcl.s_ospcl.c_addr, (long)256);
if (u_ospcl.s_ospcl.c_magic != OFS_MAGIC ||
checksum((int *)(&u_ospcl.s_ospcl)) == FAIL)
return(FAIL);
buf->c_magic = NFS_MAGIC;
good:
if ((buf->c_dinode.di_size == 0 || buf->c_dinode.di_size > 0xfffffff) &&
(buf->c_dinode.di_mode & IFMT) == IFDIR && Qcvt == 0) {
qcvt.qval = buf->c_dinode.di_size;
if (qcvt.val[0] || qcvt.val[1]) {
printf("Note: Doing Quad swapping\n");
Qcvt = 1;
}
}
if (Qcvt) {
qcvt.qval = buf->c_dinode.di_size;
i = qcvt.val[1];
qcvt.val[1] = qcvt.val[0];
qcvt.val[0] = i;
buf->c_dinode.di_size = qcvt.qval;
}
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_dinode.di_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_flags & DR_NEWINODEFMT) == 0)
oldinofmt = 1;
/* fall through */
case TS_END:
buf->c_inumber = 0;
break;
case TS_INODE:
case TS_ADDR:
break;
default:
panic("gethead: unknown inode type %d\n", buf->c_type);
break;
}
/*
* If we are restoring a filesystem with old format inodes,
* copy the uid/gid to the new location.
*/
if (oldinofmt) {
buf->c_dinode.di_uid = buf->c_dinode.di_ouid;
buf->c_dinode.di_gid = buf->c_dinode.di_ogid;
}
tapeaddr = buf->c_tapea;
if (dflag)
accthdr(buf);
return(GOOD);
}
/*
* 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.dip = NULL;
curfile.ino = 0;
do {
if (header->c_magic != NFS_MAGIC) {
skipcnt++;
while (gethead(header) == FAIL ||
header->c_date != dumpdate)
skipcnt++;
}
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 ||
header->c_date != dumpdate)
skipcnt++;
break;
case TS_INODE:
curfile.dip = &header->c_dinode;
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;
}
