/*- * SPDX-License-Identifier: BSD-3-Clause * * 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. 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 const 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 8.6 (Berkeley) 5/1/95"; #endif static const char rcsid[] = "$FreeBSD$"; #endif /* not lint */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "dump.h" #include "pathnames.h" int notify = 0; /* notify operator flag */ int snapdump = 0; /* dumping live filesystem, so use snapshot */ int blockswritten = 0; /* number of blocks written on current tape */ int tapeno = 0; /* current tape number */ int density = 0; /* density in bytes/0.1" " <- this is for hilit19 */ int ntrec = NTREC; /* # tape blocks in each tape record */ int cartridge = 0; /* Assume non-cartridge tape */ int cachesize = 0; /* block cache size (in bytes), defaults to 0 */ long dev_bsize = 1; /* recalculated below */ long blocksperfile; /* output blocks per file */ char *host = NULL; /* remote host (if any) */ static char *getmntpt(char *, int *); static long numarg(const char *, long, long); static void obsolete(int *, char **[]); static void usage(void) __dead2; int main(int argc, char *argv[]) { struct stat sb; ino_t ino; int dirty; union dinode *dp; struct fstab *dt; char *map, *mntpt; int ch, mode, mntflags; int i, ret, anydirskipped, bflag = 0, Tflag = 0, honorlevel = 1; int just_estimate = 0; ino_t maxino; char *tmsg; spcl.c_date = _time_to_time64(time(NULL)); tsize = 0; /* Default later, based on 'c' option for cart tapes */ dumpdates = _PATH_DUMPDATES; popenout = NULL; tape = NULL; 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; rsync_friendly = 0; if (argc < 2) usage(); obsolete(&argc, &argv); while ((ch = getopt(argc, argv, "0123456789aB:b:C:cD:d:f:h:LnP:RrSs: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 = 10 * level + ch - '0'; break; case 'a': /* `auto-size', Write to EOM. */ unlimited = 1; break; case 'B': /* blocks per output file */ blocksperfile = numarg("number of blocks per file", 1L, 0L); break; case 'b': /* blocks per tape write */ ntrec = numarg("number of blocks per write", 1L, 1000L); break; case 'C': cachesize = numarg("cachesize", 0, 0) * 1024 * 1024; break; case 'c': /* Tape is cart. not 9-track */ cartridge = 1; break; case 'D': dumpdates = optarg; 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 */ if (popenout != NULL) errx(X_STARTUP, "You cannot use the P and f " "flags together.\n"); tape = optarg; break; case 'h': honorlevel = numarg("honor level", 0L, 10L); break; case 'L': snapdump = 1; break; case 'n': /* notify operators */ notify = 1; break; case 'P': if (tape != NULL) errx(X_STARTUP, "You cannot use the P and f " "flags together.\n"); popenout = optarg; break; case 'r': /* store slightly less data to be friendly to rsync */ if (rsync_friendly < 1) rsync_friendly = 1; break; case 'R': /* store even less data to be friendlier to rsync */ if (rsync_friendly < 2) rsync_friendly = 2; break; case 'S': /* exit after estimating # of tapes */ just_estimate = 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_STARTUP); } Tflag = 1; lastlevel = -1; break; case 'u': /* update /etc/dumpdates */ uflag = 1; break; case 'W': /* what to do */ case 'w': lastdump(ch); exit(X_FINOK); /* do nothing else */ default: usage(); } argc -= optind; argv += optind; if (argc < 1) { (void)fprintf(stderr, "Must specify disk or file system\n"); exit(X_STARTUP); } 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_STARTUP); } if (rsync_friendly && (level > 0)) { (void)fprintf(stderr, "%s %s\n", "rsync friendly options", "can be used only with level 0 dumps."); exit(X_STARTUP); } if (Tflag && uflag) { (void)fprintf(stderr, "You cannot use the T and u flags together.\n"); exit(X_STARTUP); } if (popenout) { tape = "child pipeline process"; } else if (tape == NULL && (tape = getenv("TAPE")) == NULL) tape = _PATH_DEFTAPE; if (strcmp(tape, "-") == 0) { pipeout++; tape = "standard output"; } if (blocksperfile) blocksperfile = rounddown(blocksperfile, ntrec); else if (!unlimited) { /* * 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) * hilit19 hits again: " */ 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 (strchr(tape, '\n')) { (void)fprintf(stderr, "invalid characters in tape\n"); exit(X_STARTUP); } if (rmthost(host) == 0) exit(X_STARTUP); #else (void)fprintf(stderr, "remote dump not enabled\n"); exit(X_STARTUP); #endif } (void)setuid(getuid()); /* 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); dump_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); if (disk == NULL) errx(X_STARTUP, "%s: unknown file system", 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); } spcl.c_dev[NAMELEN-1]='\0'; spcl.c_filesys[NAMELEN-1]='\0'; if ((mntpt = getmntpt(disk, &mntflags)) != NULL) { if (mntflags & MNT_RDONLY) { if (snapdump != 0) { msg("WARNING: %s\n", "-L ignored for read-only filesystem."); snapdump = 0; } } else if (snapdump == 0) { msg("WARNING: %s\n", "should use -L when dumping live read-write " "filesystems!"); } else { char snapname[BUFSIZ], snapcmd[BUFSIZ]; snprintf(snapname, sizeof snapname, "%s/.snap", mntpt); if ((stat(snapname, &sb) < 0) || !S_ISDIR(sb.st_mode)) { msg("WARNING: %s %s\n", "-L requested but snapshot location", snapname); msg(" %s: %s\n", "is not a directory", "dump downgraded, -L ignored"); snapdump = 0; } else { snprintf(snapname, sizeof snapname, "%s/.snap/dump_snapshot", mntpt); snprintf(snapcmd, sizeof snapcmd, "%s %s %s", _PATH_MKSNAP_FFS, mntpt, snapname); unlink(snapname); if (system(snapcmd) != 0) errx(X_STARTUP, "Cannot create %s: %s\n", snapname, strerror(errno)); if ((diskfd = open(snapname, O_RDONLY)) < 0) { unlink(snapname); errx(X_STARTUP, "Cannot open %s: %s\n", snapname, strerror(errno)); } unlink(snapname); if (fstat(diskfd, &sb) != 0) err(X_STARTUP, "%s: stat", snapname); spcl.c_date = _time_to_time64(sb.st_mtime); } } } else if (snapdump != 0) { msg("WARNING: Cannot use -L on an unmounted filesystem.\n"); snapdump = 0; } if (snapdump == 0) { if ((diskfd = open(disk, O_RDONLY)) < 0) err(X_STARTUP, "Cannot open %s", disk); if (fstat(diskfd, &sb) != 0) err(X_STARTUP, "%s: stat", disk); if (S_ISDIR(sb.st_mode)) errx(X_STARTUP, "%s: unknown file system", disk); } (void)strcpy(spcl.c_label, "none"); (void)gethostname(spcl.c_host, NAMELEN); spcl.c_level = level; spcl.c_type = TS_TAPE; if (rsync_friendly) { /* don't store real dump times */ spcl.c_date = 0; spcl.c_ddate = 0; } if (spcl.c_date == 0) { tmsg = "the epoch\n"; } else { time_t t = _time64_to_time(spcl.c_date); tmsg = ctime(&t); } msg("Date of this level %d dump: %s", level, tmsg); if (!Tflag && (!rsync_friendly)) getdumptime(); /* /etc/dumpdates snarfed */ if (spcl.c_ddate == 0) { tmsg = "the epoch\n"; } else { time_t t = _time64_to_time(spcl.c_ddate); tmsg = ctime(&t); } if (lastlevel < 0) msg("Date of last (level unknown) dump: %s", tmsg); else msg("Date of last level %d dump: %s", lastlevel, tmsg); msg("Dumping %s%s ", snapdump ? "snapshot of ": "", 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); sync(); if ((ret = sbget(diskfd, &sblock, -1)) != 0) { switch (ret) { case ENOENT: warn("Cannot find file system superblock"); return (1); default: warn("Unable to read file system superblock"); return (1); } } dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1); dev_bshift = ffs(dev_bsize) - 1; if (dev_bsize != (1 << dev_bshift)) quit("dev_bsize (%ld) 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; mapsize = roundup(howmany(maxino, CHAR_BIT), 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; passno = 1; setproctitle("%s: pass 1: regular files", disk); msg("mapping (Pass I) [regular files]\n"); anydirskipped = mapfiles(maxino, &tapesize); passno = 2; setproctitle("%s: pass 2: directories", disk); msg("mapping (Pass II) [directories]\n"); while (anydirskipped) { anydirskipped = mapdirs(maxino, &tapesize); } if (pipeout || unlimited) { 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 = ( (double) tapesize /* blocks */ * TP_BSIZE /* bytes/block */ * (1.0/density) /* 0.1" / byte " */ + (double) 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 = ( (double) tapesize /* blocks */ * TP_BSIZE /* bytes / block */ * (1.0/density) /* 0.1" / byte " */ + (double) 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); } /* * If the user only wants an estimate of the number of * tapes, exit now. */ if (just_estimate) exit(0); /* * 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); passno = 3; setproctitle("%s: pass 3: directories", disk); 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) % CHAR_BIT) == 0) /* map is offset by 1 */ dirty = *map++; else dirty >>= 1; if ((dirty & 1) == 0) continue; /* * Skip directory inodes deleted and maybe reallocated */ dp = getinode0(ino, &mode); if (mode != IFDIR) continue; (void)dumpino(dp, ino); } passno = 4; setproctitle("%s: pass 4: regular files", disk); msg("dumping (Pass IV) [regular files]\n"); for (map = dumpinomap, ino = 1; ino < maxino; ino++) { if (((ino - 1) % CHAR_BIT) == 0) /* map is offset by 1 */ dirty = *map++; else dirty >>= 1; if ((dirty & 1) == 0) continue; /* * Skip inodes deleted and reallocated as directories. */ dp = getinode0(ino, &mode); if (mode == IFDIR) continue; (void)dumpino(dp, ino); } (void)time((time_t *)&(tend_writing)); spcl.c_type = TS_END; for (i = 0; i < ntrec; i++) writeheader(maxino - 1); if (pipeout) msg("DUMP: %jd tape blocks\n", (intmax_t)spcl.c_tapea); else msg("DUMP: %jd tape blocks on %d volume%s\n", (intmax_t)spcl.c_tapea, spcl.c_volume, (spcl.c_volume == 1) ? "" : "s"); /* report dump performance, avoid division through zero */ if (tend_writing - tstart_writing == 0) msg("finished in less than a second\n"); else msg("finished in %jd seconds, throughput %jd KBytes/sec\n", (intmax_t)tend_writing - tstart_writing, (intmax_t)(spcl.c_tapea / (tend_writing - tstart_writing))); putdumptime(); trewind(); broadcast("DUMP IS DONE!\a\a\n"); msg("DUMP IS DONE\n"); Exit(X_FINOK); /* NOTREACHED */ } static void usage(void) { fprintf(stderr, "usage: dump [-0123456789acLnSu] [-B records] [-b blocksize] [-C cachesize]\n" " [-D dumpdates] [-d density] [-f file | -P pipecommand] [-h level]\n" " [-s feet] [-T date] filesystem\n" " dump -W | -w\n"); exit(X_STARTUP); } /* * Check to see if a disk is currently mounted. */ static char * getmntpt(char *name, int *mntflagsp) { long mntsize, i; struct statfs *mntbuf; mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); for (i = 0; i < mntsize; i++) { if (!strcmp(mntbuf[i].f_mntfromname, name)) { *mntflagsp = mntbuf[i].f_flags; return (mntbuf[i].f_mntonname); } } return (0); } /* * 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(const char *meaning, long vmin, long 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(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(char *cp) { struct stat sb; /* * Ensure that the device passed in is a raw device. */ if (stat(cp, &sb) == 0 && (sb.st_mode & S_IFMT) == S_IFCHR) return (cp); /* * Since there's only one device type now, we can't construct any * better name, so we have to return NULL. */ return (NULL); } /* * obsolete -- * Change set of key letters and ordered arguments into something * getopt(3) will like. */ static void obsolete(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 or slash. */ ap = argv[1]; if (argc == 1 || *ap == '-' || *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 'D': case 'C': 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; } else free(flagsp); /* Copy remaining arguments. */ while ((*nargv++ = *argv++)); /* Update argument count. */ *argcp = nargv - *argvp - 1; }