Net2/usr/src/sbin/dump/dumpmain.c
/*-
* Copyright (c) 1980, 1991 The Regents of the University of California.
* All rights reserved.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 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
char copyright[] =
"@(#) Copyright (c) 1980, 1991 The Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)dumpmain.c 5.16 (Berkeley) 4/24/91";
#endif /* not lint */
#include <sys/param.h>
#include <ufs/dir.h>
#include <ufs/dinode.h>
#include <ufs/fs.h>
#include <protocols/dumprestore.h>
#include <signal.h>
#ifdef __STDC__
#include <time.h>
#endif
#include <fcntl.h>
#include <fstab.h>
#include <stdio.h>
#ifdef __STDC__
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#endif
#include "dump.h"
#include "pathnames.h"
int notify = 0; /* notify operator flag */
int blockswritten = 0; /* number of blocks written on current tape */
int tapeno = 0; /* current tape number */
int density = 0; /* density in bytes/0.1" */
int ntrec = NTREC; /* # tape blocks in each tape record */
int cartridge = 0; /* Assume non-cartridge tape */
long dev_bsize = 1; /* recalculated below */
long blocksperfile; /* output blocks per file */
#ifdef RDUMP
char *host;
int rmthost();
#endif
main(argc, argv)
int argc;
char **argv;
{
register ino_t ino;
register int dirty;
register struct dinode *dp;
register struct fstab *dt;
register char *map;
register char *cp;
int i, anydirskipped, bflag = 0;
float fetapes;
ino_t maxino;
time(&(spcl.c_date));
tsize = 0; /* Default later, based on 'c' option for cart tapes */
tape = _PATH_DEFTAPE;
dumpdates = _PATH_DUMPDATES;
temp = _PATH_DTMP;
if (TP_BSIZE / DEV_BSIZE == 0 || TP_BSIZE % DEV_BSIZE != 0)
quit("TP_BSIZE must be a multiple of DEV_BSIZE\n");
level = '0';
argv++;
argc -= 2;
for (cp = *argv++; *cp; cp++) {
switch (*cp) {
case '-':
continue;
case 'w':
lastdump('w'); /* tell us only what has to be done */
exit(0);
case 'W': /* what to do */
lastdump('W'); /* tell us state of what is done */
exit(0); /* do nothing else */
case 'f': /* output file */
if (argc < 1)
break;
tape = *argv++;
argc--;
continue;
case 'd': /* density, in bits per inch */
if (argc < 1)
break;
density = atoi(*argv) / 10;
if (density < 1) {
fprintf(stderr, "bad density \"%s\"\n", *argv);
Exit(X_ABORT);
}
argc--;
argv++;
if (density >= 625 && !bflag)
ntrec = HIGHDENSITYTREC;
continue;
case 's': /* tape size, feet */
if (argc < 1)
break;
tsize = atol(*argv);
if (tsize < 1) {
fprintf(stderr, "bad size \"%s\"\n", *argv);
Exit(X_ABORT);
}
argc--;
argv++;
tsize *= 12 * 10;
continue;
case 'b': /* blocks per tape write */
if (argc < 1)
break;
bflag++;
ntrec = atoi(*argv);
if (ntrec < 1) {
fprintf(stderr, "%s \"%s\"\n",
"bad number of blocks per write ", *argv);
Exit(X_ABORT);
}
argc--;
argv++;
continue;
case 'B': /* blocks per output file */
if (argc < 1)
break;
blocksperfile = atol(*argv);
if (blocksperfile < 1) {
fprintf(stderr, "%s \"%s\"\n",
"bad number of blocks per file ", *argv);
Exit(X_ABORT);
}
argc--;
argv++;
continue;
case 'c': /* Tape is cart. not 9-track */
cartridge++;
continue;
case '0': /* dump level */
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
level = *cp;
continue;
case 'u': /* update /etc/dumpdates */
uflag++;
continue;
case 'n': /* notify operators */
notify++;
continue;
default:
fprintf(stderr, "bad key '%c'\n", *cp);
Exit(X_ABORT);
}
fprintf(stderr, "missing argument to '%c'\n", *cp);
Exit(X_ABORT);
}
if (argc < 1) {
fprintf(stderr, "Must specify disk or filesystem\n");
Exit(X_ABORT);
} else {
disk = *argv++;
argc--;
}
if (argc >= 1) {
fprintf(stderr, "Unknown arguments to dump:");
while (argc--)
fprintf(stderr, " %s", *argv++);
fprintf(stderr, "\n");
Exit(X_ABORT);
}
if (strcmp(tape, "-") == 0) {
pipeout++;
tape = "standard output";
}
if (blocksperfile)
blocksperfile = blocksperfile / ntrec * ntrec; /* round down */
else {
/*
* Determine how to default tape size and density
*
* density tape size
* 9-track 1600 bpi (160 bytes/.1") 2300 ft.
* 9-track 6250 bpi (625 bytes/.1") 2300 ft.
* cartridge 8000 bpi (100 bytes/.1") 1700 ft.
* (450*4 - slop)
*/
if (density == 0)
density = cartridge ? 100 : 160;
if (tsize == 0)
tsize = cartridge ? 1700L*120L : 2300L*120L;
}
#ifdef RDUMP
{ char *index();
host = tape;
tape = index(host, ':');
if (tape == 0) {
msg("need keyletter ``f'' and device ``host:tape''\n");
exit(1);
}
*tape++ = 0;
if (rmthost(host) == 0)
exit(X_ABORT);
}
setuid(getuid()); /* rmthost() is the only reason to be setuid */
#endif
if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
signal(SIGHUP, sighup);
if (signal(SIGTRAP, SIG_IGN) != SIG_IGN)
signal(SIGTRAP, sigtrap);
if (signal(SIGFPE, SIG_IGN) != SIG_IGN)
signal(SIGFPE, sigfpe);
if (signal(SIGBUS, SIG_IGN) != SIG_IGN)
signal(SIGBUS, sigbus);
if (signal(SIGSEGV, SIG_IGN) != SIG_IGN)
signal(SIGSEGV, sigsegv);
if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
signal(SIGTERM, sigterm);
if (signal(SIGINT, interrupt) == SIG_IGN)
signal(SIGINT, SIG_IGN);
set_operators(); /* /etc/group snarfed */
getfstab(); /* /etc/fstab snarfed */
/*
* disk can be either the full special file name,
* the suffix of the special file name,
* the special name missing the leading '/',
* the file system name with or without the leading '/'.
*/
dt = fstabsearch(disk);
if (dt != 0) {
disk = rawname(dt->fs_spec);
strncpy(spcl.c_dev, dt->fs_spec, NAMELEN);
strncpy(spcl.c_filesys, dt->fs_file, NAMELEN);
} else {
strncpy(spcl.c_dev, disk, NAMELEN);
strncpy(spcl.c_filesys, "an unlisted file system", NAMELEN);
}
strcpy(spcl.c_label, "none");
gethostname(spcl.c_host, NAMELEN);
spcl.c_level = level - '0';
spcl.c_type = TS_TAPE;
getdumptime(); /* /etc/dumpdates snarfed */
msg("Date of this level %c dump: %s", level,
spcl.c_date == 0 ? "the epoch\n" : ctime(&spcl.c_date));
msg("Date of last level %c dump: %s", lastlevel,
spcl.c_ddate == 0 ? "the epoch\n" : ctime(&spcl.c_ddate));
msg("Dumping %s ", disk);
if (dt != 0)
msgtail("(%s) ", dt->fs_file);
#ifdef RDUMP
msgtail("to %s on host %s\n", tape, host);
#else
msgtail("to %s\n", tape);
#endif
if ((diskfd = open(disk, O_RDONLY)) < 0) {
msg("Cannot open %s\n", disk);
Exit(X_ABORT);
}
sync();
sblock = (struct fs *)buf;
bread(SBOFF, sblock, SBSIZE);
if (sblock->fs_magic != FS_MAGIC)
quit("bad sblock magic number\n");
dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1);
dev_bshift = ffs(dev_bsize) - 1;
if (dev_bsize != (1 << dev_bshift))
quit("dev_bsize (%d) is not a power of 2", dev_bsize);
tp_bshift = ffs(TP_BSIZE) - 1;
if (TP_BSIZE != (1 << tp_bshift))
quit("TP_BSIZE (%d) is not a power of 2", TP_BSIZE);
maxino = sblock->fs_ipg * sblock->fs_ncg - 1;
mapsize = roundup(howmany(sblock->fs_ipg * sblock->fs_ncg, NBBY),
TP_BSIZE);
usedinomap = (char *)calloc(mapsize, sizeof(char));
dumpdirmap = (char *)calloc(mapsize, sizeof(char));
dumpinomap = (char *)calloc(mapsize, sizeof(char));
tapesize = 3 * (howmany(mapsize * sizeof(char), TP_BSIZE) + 1);
msg("mapping (Pass I) [regular files]\n");
anydirskipped = mapfiles(maxino, &tapesize);
msg("mapping (Pass II) [directories]\n");
while (anydirskipped) {
anydirskipped = mapdirs(maxino, &tapesize);
}
if (pipeout)
tapesize += 10; /* 10 trailer blocks */
else {
if (blocksperfile)
fetapes = (float) tapesize / blocksperfile;
else if (cartridge) {
/* Estimate number of tapes, assuming streaming stops at
the end of each block written, and not in mid-block.
Assume no erroneous blocks; this can be compensated
for with an artificially low tape size. */
fetapes =
( tapesize /* blocks */
* TP_BSIZE /* bytes/block */
* (1.0/density) /* 0.1" / byte */
+
tapesize /* blocks */
* (1.0/ntrec) /* streaming-stops per block */
* 15.48 /* 0.1" / streaming-stop */
) * (1.0 / tsize ); /* tape / 0.1" */
} else {
/* Estimate number of tapes, for old fashioned 9-track
tape */
int tenthsperirg = (density == 625) ? 3 : 7;
fetapes =
( tapesize /* blocks */
* TP_BSIZE /* bytes / block */
* (1.0/density) /* 0.1" / byte */
+
tapesize /* blocks */
* (1.0/ntrec) /* IRG's / block */
* tenthsperirg /* 0.1" / IRG */
) * (1.0 / tsize ); /* tape / 0.1" */
}
etapes = fetapes; /* truncating assignment */
etapes++;
/* count the dumped inodes map on each additional tape */
tapesize += (etapes - 1) *
(howmany(mapsize * sizeof(char), TP_BSIZE) + 1);
tapesize += etapes + 10; /* headers + 10 trailer blks */
}
if (pipeout)
msg("estimated %ld tape blocks.\n", tapesize);
else
msg("estimated %ld tape blocks on %3.2f tape(s).\n",
tapesize, fetapes);
alloctape(); /* Allocate tape buffer */
startnewtape();
time(&(tstart_writing));
dumpmap(usedinomap, TS_CLRI, maxino);
msg("dumping (Pass III) [directories]\n");
for (map = dumpdirmap, ino = 0; ino < maxino; ) {
if ((ino % NBBY) == 0)
dirty = *map++;
else
dirty >>= 1;
ino++;
if ((dirty & 1) == 0)
continue;
/*
* Skip directory inodes deleted and maybe reallocated
*/
dp = getino(ino);
if ((dp->di_mode & IFMT) != IFDIR)
continue;
dumpino(dp, ino);
}
msg("dumping (Pass IV) [regular files]\n");
for (map = dumpinomap, ino = 0; ino < maxino; ) {
if ((ino % NBBY) == 0)
dirty = *map++;
else
dirty >>= 1;
ino++;
if ((dirty & 1) == 0)
continue;
/*
* Skip inodes deleted and reallocated as directories.
*/
dp = getino(ino);
if ((dp->di_mode & IFMT) == IFDIR)
continue;
dumpino(dp, ino);
}
spcl.c_type = TS_END;
#ifndef RDUMP
for (i = 0; i < ntrec; i++)
writeheader(maxino);
#endif
if (pipeout)
msg("DUMP: %ld tape blocks\n",spcl.c_tapea);
else
msg("DUMP: %ld tape blocks on %d volumes(s)\n",
spcl.c_tapea, spcl.c_volume);
msg("DUMP IS DONE\n");
putdumptime();
#ifndef RDUMP
if (!pipeout) {
close(tapefd);
trewind();
}
#else
for (i = 0; i < ntrec; i++)
writeheader(curino);
trewind();
#endif
broadcast("DUMP IS DONE!\7\7\n");
Exit(X_FINOK);
/* NOTREACHED */
}
void
sigAbort()
{
if (pipeout)
quit("Unknown signal, cannot recover\n");
msg("Rewriting attempted as response to unknown signal.\n");
fflush(stderr);
fflush(stdout);
close_rewind();
exit(X_REWRITE);
}
void sighup(){ msg("SIGHUP() try rewriting\n"); sigAbort();}
void sigtrap(){ msg("SIGTRAP() try rewriting\n"); sigAbort();}
void sigfpe(){ msg("SIGFPE() try rewriting\n"); sigAbort();}
void sigbus(){ msg("SIGBUS() try rewriting\n"); sigAbort();}
void sigsegv(){ msg("SIGSEGV() ABORTING!\n"); abort();}
void sigalrm(){ msg("SIGALRM() try rewriting\n"); sigAbort();}
void sigterm(){ msg("SIGTERM() try rewriting\n"); sigAbort();}
char *
rawname(cp)
char *cp;
{
static char rawbuf[32];
char *rindex();
char *dp = rindex(cp, '/');
if (dp == 0)
return (0);
*dp = 0;
strcpy(rawbuf, cp);
*dp = '/';
strcat(rawbuf, "/r");
strcat(rawbuf, dp+1);
return (rawbuf);
}