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NetBSD/sbin/dump/main.c

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/* $NetBSD: main.c,v 1.8 1996/03/15 22:39:32 scottr Exp $ */
/*-
* Copyright (c) 1980, 1991, 1993, 1994
* 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
static char copyright[] =
"@(#) Copyright (c) 1980, 1991, 1993, 1994\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)main.c 8.4 (Berkeley) 4/15/94";
#else
static char rcsid[] = "$NetBSD: main.c,v 1.8 1996/03/15 22:39:32 scottr Exp $";
#endif
#endif /* not lint */
#include <sys/param.h>
#include <sys/time.h>
#ifdef sunos
#include <sys/vnode.h>
#include <ufs/inode.h>
#include <ufs/fs.h>
#else
#include <ufs/ffs/fs.h>
#include <ufs/ufs/dinode.h>
#endif
#include <protocols/dumprestore.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <fstab.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "dump.h"
#include "pathnames.h"
#ifndef SBOFF
#define SBOFF (SBLOCK * DEV_BSIZE)
#endif
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 */
char *host = NULL; /* remote host (if any) */
uid_t uid; /* real uid */
uid_t euid; /* effective uid */
static long numarg __P((char *, long, long));
static void obsolete __P((int *, char **[]));
static void usage __P((void));
int
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 int ch;
int i, anydirskipped, bflag = 0, Tflag = 0, honorlevel = 1;
ino_t maxino;
uid = getuid();
euid = geteuid();
(void) seteuid(uid);
spcl.c_date = 0;
(void)time((time_t *)&spcl.c_date);
tsize = 0; /* Default later, based on 'c' option for cart tapes */
if ((tape = getenv("TAPE")) == NULL)
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';
if (argc < 2)
usage();
obsolete(&argc, &argv);
while ((ch = getopt(argc, argv, "0123456789B:b:cd:f:h:ns:T:uWw")) != -1)
switch (ch) {
/* dump level */
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
level = ch;
break;
case 'B': /* blocks per output file */
blocksperfile = numarg("blocks per file", 1L, 0L);
break;
case 'b': /* blocks per tape write */
ntrec = numarg("blocks per write", 1L, 1000L);
break;
case 'c': /* Tape is cart. not 9-track */
cartridge = 1;
break;
case 'd': /* density, in bits per inch */
density = numarg("density", 10L, 327670L) / 10;
if (density >= 625 && !bflag)
ntrec = HIGHDENSITYTREC;
break;
case 'f': /* output file */
tape = optarg;
break;
case 'h':
honorlevel = numarg("honor level", 0L, 10L);
break;
case 'n': /* notify operators */
notify = 1;
break;
case 's': /* tape size, feet */
tsize = numarg("tape size", 1L, 0L) * 12 * 10;
break;
case 'T': /* time of last dump */
spcl.c_ddate = unctime(optarg);
if (spcl.c_ddate < 0) {
(void)fprintf(stderr, "bad time \"%s\"\n",
optarg);
exit(X_ABORT);
}
Tflag = 1;
lastlevel = '?';
break;
case 'u': /* update /etc/dumpdates */
uflag = 1;
break;
case 'W': /* what to do */
case 'w':
lastdump(ch);
exit(0); /* do nothing else */
default:
usage();
}
argc -= optind;
argv += optind;
if (argc < 1) {
(void)fprintf(stderr, "Must specify disk or filesystem\n");
exit(X_ABORT);
}
disk = *argv++;
argc--;
if (argc >= 1) {
(void)fprintf(stderr, "Unknown arguments to dump:");
while (argc--)
(void)fprintf(stderr, " %s", *argv++);
(void)fprintf(stderr, "\n");
exit(X_ABORT);
}
if (Tflag && uflag) {
(void)fprintf(stderr,
"You cannot use the T and u flags together.\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;
}
if (strchr(tape, ':')) {
host = tape;
tape = strchr(host, ':');
*tape++ = '\0';
#ifdef RDUMP
if (rmthost(host) == 0)
exit(X_ABORT);
#else
(void)fprintf(stderr, "remote dump not enabled\n");
exit(X_ABORT);
#endif
}
(void) setuid(uid); /* rmthost() is the only reason to be setuid */
if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
signal(SIGHUP, sig);
if (signal(SIGTRAP, SIG_IGN) != SIG_IGN)
signal(SIGTRAP, sig);
if (signal(SIGFPE, SIG_IGN) != SIG_IGN)
signal(SIGFPE, sig);
if (signal(SIGBUS, SIG_IGN) != SIG_IGN)
signal(SIGBUS, sig);
if (signal(SIGSEGV, SIG_IGN) != SIG_IGN)
signal(SIGSEGV, sig);
if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
signal(SIGTERM, sig);
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 != NULL) {
disk = rawname(dt->fs_spec);
(void)strncpy(spcl.c_dev, dt->fs_spec, NAMELEN);
(void)strncpy(spcl.c_filesys, dt->fs_file, NAMELEN);
} else {
(void)strncpy(spcl.c_dev, disk, NAMELEN);
(void)strncpy(spcl.c_filesys, "an unlisted file system",
NAMELEN);
}
(void)strcpy(spcl.c_label, "none");
(void)gethostname(spcl.c_host, NAMELEN);
spcl.c_level = level - '0';
spcl.c_type = TS_TAPE;
if (!Tflag)
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 != NULL)
msgtail("(%s) ", dt->fs_file);
if (host)
msgtail("to %s on host %s\n", tape, host);
else
msgtail("to %s\n", tape);
if ((diskfd = open(disk, O_RDONLY)) < 0) {
msg("Cannot open %s\n", disk);
exit(X_ABORT);
}
sync();
sblock = (struct fs *)sblock_buf;
bread(SBOFF, (char *) 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);
#ifdef FS_44INODEFMT
if (sblock->fs_inodefmt >= FS_44INODEFMT)
spcl.c_flags |= DR_NEWINODEFMT;
#endif
maxino = sblock->fs_ipg * sblock->fs_ncg;
mapsize = roundup(howmany(maxino, NBBY), TP_BSIZE);
usedinomap = (char *)calloc((unsigned) mapsize, sizeof(char));
dumpdirmap = (char *)calloc((unsigned) mapsize, sizeof(char));
dumpinomap = (char *)calloc((unsigned) mapsize, sizeof(char));
tapesize = 3 * (howmany(mapsize * sizeof(char), TP_BSIZE) + 1);
nonodump = spcl.c_level < honorlevel;
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 */
msg("estimated %ld tape blocks.\n", tapesize);
} else {
double fetapes;
if (blocksperfile)
fetapes = (double) 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 */
msg("estimated %ld tape blocks on %3.2f tape(s).\n",
tapesize, fetapes);
}
/*
* Allocate tape buffer.
*/
if (!alloctape())
quit("can't allocate tape buffers - try a smaller blocking factor.\n");
startnewtape(1);
(void)time((time_t *)&(tstart_writing));
dumpmap(usedinomap, TS_CLRI, maxino - 1);
msg("dumping (Pass III) [directories]\n");
dirty = 0; /* XXX just to get gcc to shut up */
for (map = dumpdirmap, ino = 1; ino < maxino; ino++) {
if (((ino - 1) % NBBY) == 0) /* map is offset by 1 */
dirty = *map++;
else
dirty >>= 1;
if ((dirty & 1) == 0)
continue;
/*
* Skip directory inodes deleted and maybe reallocated
*/
dp = getino(ino);
if ((dp->di_mode & IFMT) != IFDIR)
continue;
(void)dumpino(dp, ino);
}
msg("dumping (Pass IV) [regular files]\n");
for (map = dumpinomap, ino = 1; ino < maxino; ino++) {
int mode;
if (((ino - 1) % NBBY) == 0) /* map is offset by 1 */
dirty = *map++;
else
dirty >>= 1;
if ((dirty & 1) == 0)
continue;
/*
* Skip inodes deleted and reallocated as directories.
*/
dp = getino(ino);
mode = dp->di_mode & IFMT;
if (mode == IFDIR)
continue;
(void)dumpino(dp, ino);
}
spcl.c_type = TS_END;
for (i = 0; i < ntrec; i++)
writeheader(maxino - 1);
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);
putdumptime();
trewind();
broadcast("DUMP IS DONE!\7\7\n");
msg("DUMP IS DONE\n");
Exit(X_FINOK);
/* NOTREACHED */
}
static void
usage()
{
(void)fprintf(stderr, "usage: dump [-0123456789cnu] [-B records] [-b blocksize] [-d density] [-f file]\n [-h level] [-s feet] [-T date] filesystem\n");
(void)fprintf(stderr, " dump [-W | -w]\n");
exit(1);
}
/*
* Pick up a numeric argument. It must be nonnegative and in the given
* range (except that a vmax of 0 means unlimited).
*/
static long
numarg(meaning, vmin, vmax)
char *meaning;
long vmin, vmax;
{
char *p;
long val;
val = strtol(optarg, &p, 10);
if (*p)
errx(1, "illegal %s -- %s", meaning, optarg);
if (val < vmin || (vmax && val > vmax))
errx(1, "%s must be between %ld and %ld", meaning, vmin, vmax);
return (val);
}
void
sig(signo)
int signo;
{
switch(signo) {
case SIGALRM:
case SIGBUS:
case SIGFPE:
case SIGHUP:
case SIGTERM:
case SIGTRAP:
if (pipeout)
quit("Signal on pipe: cannot recover\n");
msg("Rewriting attempted as response to unknown signal.\n");
(void)fflush(stderr);
(void)fflush(stdout);
close_rewind();
exit(X_REWRITE);
/* NOTREACHED */
case SIGSEGV:
msg("SIGSEGV: ABORTING!\n");
(void)signal(SIGSEGV, SIG_DFL);
(void)kill(0, SIGSEGV);
/* NOTREACHED */
}
}
char *
rawname(cp)
char *cp;
{
static char rawbuf[MAXPATHLEN];
char *dp = strrchr(cp, '/');
if (dp == NULL)
return (NULL);
*dp = '\0';
(void)strcpy(rawbuf, cp);
*dp = '/';
(void)strcat(rawbuf, "/r");
(void)strcat(rawbuf, dp + 1);
return (rawbuf);
}
/*
* obsolete --
* Change set of key letters and ordered arguments into something
* getopt(3) will like.
*/
static void
obsolete(argcp, argvp)
int *argcp;
char **argvp[];
{
int argc, flags;
char *ap, **argv, *flagsp, **nargv, *p;
/* Setup. */
argv = *argvp;
argc = *argcp;
/* Return if no arguments or first argument has leading dash. */
ap = argv[1];
if (argc == 1 || *ap == '-')
return;
/* Allocate space for new arguments. */
if ((*argvp = nargv = malloc((argc + 1) * sizeof(char *))) == NULL ||
(p = flagsp = malloc(strlen(ap) + 2)) == NULL)
err(1, NULL);
*nargv++ = *argv;
argv += 2;
for (flags = 0; *ap; ++ap) {
switch (*ap) {
case 'B':
case 'b':
case 'd':
case 'f':
case 'h':
case 's':
case 'T':
if (*argv == NULL) {
warnx("option requires an argument -- %c", *ap);
usage();
}
if ((nargv[0] = malloc(strlen(*argv) + 2 + 1)) == NULL)
err(1, NULL);
nargv[0][0] = '-';
nargv[0][1] = *ap;
(void)strcpy(&nargv[0][2], *argv);
++argv;
++nargv;
break;
default:
if (!flags) {
*p++ = '-';
flags = 1;
}
*p++ = *ap;
break;
}
}
/* Terminate flags. */
if (flags) {
*p = '\0';
*nargv++ = flagsp;
}
/* Copy remaining arguments. */
while (*nargv++ = *argv++);
/* Update argument count. */
*argcp = nargv - *argvp - 1;
}
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