/* $NetBSD: main.c,v 1.75.2.1 2020/12/06 10:31:02 martin 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. 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. */ #include #ifndef lint __COPYRIGHT("@(#) Copyright (c) 1980, 1991, 1993, 1994\ The Regents of the University of California. All rights reserved."); #endif /* not lint */ #ifndef lint #if 0 static char sccsid[] = "@(#)main.c 8.6 (Berkeley) 5/1/95"; #else __RCSID("$NetBSD: main.c,v 1.75.2.1 2020/12/06 10:31:02 martin Exp $"); #endif #endif /* not lint */ #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" #include "snapshot.h" int timestamp; /* print message timestamps */ int notify; /* notify operator flag */ u_int64_t blockswritten; /* number of blocks written on current tape */ int tapeno; /* current tape number */ int density; /* density in bytes/0.1" */ int ntrec = NTREC; /* # tape blocks in each tape record */ int cartridge; /* Assume non-cartridge tape */ long dev_bsize = 1; /* recalculated below */ long blocksperfile; /* output blocks per file */ const char *host; /* remote host (if any) */ int readcache = -1; /* read cache size (in readblksize blks) */ int readblksize = -1; /* read block size */ char default_time_string[] = "%T %Z"; /* default timestamp string */ char *time_string = default_time_string; /* timestamp string */ static long numarg(const char *, long, long); static void obsolete(int *, char **[]); static void usage(void); int main(int argc, char *argv[]) { ino_t ino; int dirty; union dinode *dp; struct fstab *dt; struct statvfs *mntinfo, fsbuf; char *map, *cp; int ch; int i, anydirskipped, bflag = 0, Tflag = 0, Fflag = 0, honorlevel = 1; int snap_internal = 0; ino_t maxino; time_t tnow, date; int dirc; char *mountpoint; int just_estimate = 0; char labelstr[LBLSIZE]; char buf[MAXPATHLEN], rbuf[MAXPATHLEN]; char *new_time_format; char *snap_backup = NULL; spcl.c_date = 0; (void)time(&tnow); spcl.c_date = tnow; tzset(); /* set up timezone for strftime */ if ((new_time_format = getenv("TIMEFORMAT")) != NULL) time_string = new_time_format; 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; strcpy(labelstr, "none"); /* XXX safe strcpy. */ if (TP_BSIZE / DEV_BSIZE == 0 || TP_BSIZE % DEV_BSIZE != 0) quit("TP_BSIZE must be a multiple of DEV_BSIZE"); level = '0'; timestamp = 0; if (argc < 2) usage(); obsolete(&argc, &argv); while ((ch = getopt(argc, argv, "0123456789aB:b:cd:eFf:h:ik:l:L:nr:s:StT:uU:Wwx:X")) != -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 'a': /* `auto-size', Write to EOM. */ unlimited = 1; 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); bflag = 1; 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 'e': /* eject full tapes */ eflag = 1; break; case 'F': /* files-to-dump is an fs image */ Fflag = 1; break; case 'f': /* output file */ tape = optarg; break; case 'h': honorlevel = numarg("honor level", 0L, 10L); break; case 'i': /* "true incremental" regardless level */ level = 'i'; trueinc = 1; break; case 'k': readblksize = numarg("read block size", 0, 64) * 1024; break; case 'l': /* autoload after eject full tapes */ eflag = 1; lflag = numarg("timeout (in seconds)", 1, 0); break; case 'L': /* * Note that although there are LBLSIZE characters, * the last must be '\0', so the limit on strlen() * is really LBLSIZE-1. */ if (strlcpy(labelstr, optarg, sizeof(labelstr)) >= sizeof(labelstr)) { msg( "WARNING Label `%s' is larger than limit of %lu characters.\n", optarg, (unsigned long)sizeof(labelstr) - 1); msg("WARNING: Using truncated label `%s'.\n", labelstr); } break; case 'n': /* notify operators */ notify = 1; break; case 'r': /* read cache size */ readcache = numarg("read cache size", 0, 512); break; case 's': /* tape size, feet */ tsize = numarg("tape size", 1L, 0L) * 12 * 10; break; case 'S': /* exit after estimating # of tapes */ just_estimate = 1; break; case 't': timestamp = 1; 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 = '?'; break; case 'u': /* update /etc/dumpdates */ uflag = 1; break; case 'U': /* dump device in /etc/dumpdates */ dumpdev = optarg; break; case 'W': /* what to do */ case 'w': lastdump(ch); exit(X_FINOK); /* do nothing else */ case 'x': snap_backup = optarg; break; case 'X': snap_internal = 1; break; default: usage(); } argc -= optind; argv += optind; if (argc < 1) { (void)fprintf(stderr, "Must specify disk or image, or file list\n"); exit(X_STARTUP); } /* * determine if disk is a subdirectory, and setup appropriately */ getfstab(); /* /etc/fstab snarfed */ disk = NULL; disk_dev = NULL; mountpoint = NULL; dirc = 0; for (i = 0; i < argc; i++) { struct stat sb; int error; error = lstat(argv[i], &sb); if (Fflag || (!error && (S_ISCHR(sb.st_mode) || S_ISBLK(sb.st_mode)))) { if (error) quite(errno, "can't stat %s", argv[i]); disk = argv[i]; multicheck: if (dirc != 0) quit("can't dump a disk or image at the same" " time as a file list"); break; } if ((dt = fstabsearch(argv[i])) != NULL) { disk = argv[i]; mountpoint = xstrdup(dt->fs_file); goto multicheck; } if (statvfs(argv[i], &fsbuf) == -1) quite(errno, "can't statvfs %s", argv[i]); disk = fsbuf.f_mntfromname; if (strcmp(argv[i], fsbuf.f_mntonname) == 0) goto multicheck; if (mountpoint == NULL) { mountpoint = xstrdup(fsbuf.f_mntonname); if (uflag) { msg("Ignoring u flag for subdir dump\n"); uflag = 0; } if (level > '0') { msg("Subdir dump is done at level 0\n"); level = '0'; } msg("Dumping sub files/directories from %s\n", mountpoint); } else { if (strcmp(mountpoint, fsbuf.f_mntonname) != 0) quit("%s is not on %s", argv[i], mountpoint); } msg("Dumping file/directory %s\n", argv[i]); dirc++; } if (mountpoint) free(mountpoint); if (dirc == 0) { argv++; if (argc != 1) { (void)fprintf(stderr, "Excess arguments to dump:"); while (--argc) (void)fprintf(stderr, " %s", *argv++); (void)fprintf(stderr, "\n"); exit(X_STARTUP); } } if (Tflag && uflag) { (void)fprintf(stderr, "You cannot use the T and u flags together.\n"); exit(X_STARTUP); } if (strcmp(tape, "-") == 0) { pipeout++; tape = "standard output"; } if (blocksperfile) blocksperfile = blocksperfile / ntrec * ntrec; /* round down */ 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) */ if (density == 0) density = cartridge ? 100 : 160; if (tsize == 0) tsize = cartridge ? 1700L*120L : 2300L*120L; } if ((cp = strchr(tape, ':')) != NULL) { host = tape; /* This is fine, because all the const strings don't have : */ *cp++ = '\0'; tape = cp; #ifdef RDUMP if (rmthost(host) == 0) exit(X_STARTUP); #else (void)fprintf(stderr, "remote dump not enabled\n"); exit(X_STARTUP); #endif } 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 0 if (signal(SIGSEGV, SIG_IGN) != SIG_IGN) signal(SIGSEGV, sig); #endif if (signal(SIGTERM, SIG_IGN) != SIG_IGN) signal(SIGTERM, sig); if (signal(SIGINT, interrupt) == SIG_IGN) signal(SIGINT, SIG_IGN); /* * disk can be either the full special file name, or * the file system name. */ mountpoint = NULL; mntinfo = mntinfosearch(disk); if ((dt = fstabsearch(disk)) != NULL) { if (getfsspecname(buf, sizeof(buf), dt->fs_spec) == NULL) quite(errno, "can't resolve mount %s (%s)", dt->fs_spec, buf); if (getdiskrawname(rbuf, sizeof(rbuf), buf) == NULL) quite(errno, "can't get disk raw name for %s", buf); disk = rbuf; mountpoint = dt->fs_file; msg("Found %s on %s in %s\n", disk, mountpoint, _PATH_FSTAB); } else if (mntinfo != NULL) { if (getdiskrawname(rbuf, sizeof(rbuf), mntinfo->f_mntfromname) == NULL) quite(errno, "can't get disk raw name for %s", mntinfo->f_mntfromname); disk = rbuf; mountpoint = mntinfo->f_mntonname; msg("Found %s on %s in mount table\n", disk, mountpoint); } if (mountpoint != NULL) { if (dirc != 0) (void)snprintf(spcl.c_filesys, sizeof(spcl.c_filesys), "a subset of %s", mountpoint); else (void)strlcpy(spcl.c_filesys, mountpoint, sizeof(spcl.c_filesys)); } else if (Fflag) { (void)strlcpy(spcl.c_filesys, "a file system image", sizeof(spcl.c_filesys)); } else { (void)strlcpy(spcl.c_filesys, "an unlisted file system", sizeof(spcl.c_filesys)); } (void)strlcpy(spcl.c_dev, disk, sizeof(spcl.c_dev)); (void)strlcpy(spcl.c_label, labelstr, sizeof(spcl.c_label)); (void)gethostname(spcl.c_host, sizeof(spcl.c_host)); spcl.c_host[sizeof(spcl.c_host) - 1] = '\0'; if ((snap_backup != NULL || snap_internal) && mntinfo == NULL) { msg("WARNING: Cannot use -x or -X on unmounted file system.\n"); snap_backup = NULL; snap_internal = 0; } #ifdef DUMP_LFS sync(); if (snap_backup != NULL || snap_internal) { if (lfs_wrap_stop(mountpoint) < 0) { msg("Cannot stop writing on %s\n", mountpoint); exit(X_STARTUP); } } if ((diskfd = open(disk, O_RDONLY)) < 0) { msg("Cannot open %s\n", disk); exit(X_STARTUP); } disk_dev = disk; #else /* ! DUMP_LFS */ if (snap_backup != NULL || snap_internal) { diskfd = snap_open(mntinfo->f_mntonname, snap_backup, &tnow, &disk_dev); if (diskfd < 0) { msg("Cannot open snapshot of %s\n", mntinfo->f_mntonname); exit(X_STARTUP); } spcl.c_date = tnow; } else { if ((diskfd = open(disk, O_RDONLY)) < 0) { msg("Cannot open %s\n", disk); exit(X_STARTUP); } disk_dev = disk; } sync(); #endif /* ! DUMP_LFS */ needswap = fs_read_sblock(sblock_buf); /* true incremental is always a level 10 dump */ spcl.c_level = trueinc? iswap32(10): iswap32(level - '0'); spcl.c_type = iswap32(TS_TAPE); spcl.c_date = iswap32(spcl.c_date); spcl.c_ddate = iswap32(spcl.c_ddate); if (!Tflag) getdumptime(); /* /etc/dumpdates snarfed */ date = iswap32(spcl.c_date); msg("Date of this level %c dump: %s", level, spcl.c_date == 0 ? "the epoch\n" : ctime(&date)); date = iswap32(spcl.c_ddate); msg("Date of last level %c dump: %s", lastlevel, spcl.c_ddate == 0 ? "the epoch\n" : ctime(&date)); msg("Dumping "); if (snap_backup != NULL || snap_internal) msgtail("a snapshot of "); if (dirc != 0) msgtail("a subset of "); msgtail("%s (%s) ", disk, spcl.c_filesys); if (host) msgtail("to %s on host %s\n", tape, host); else msgtail("to %s\n", tape); msg("Label: %s\n", labelstr); ufsib = fs_parametrize(); 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 = fs_maxino(); mapsize = roundup(howmany(maxino, NBBY), TP_BSIZE); usedinomap = (char *)xcalloc((unsigned) mapsize, sizeof(char)); dumpdirmap = (char *)xcalloc((unsigned) mapsize, sizeof(char)); dumpinomap = (char *)xcalloc((unsigned) mapsize, sizeof(char)); tapesize = 3 * (howmany(mapsize * sizeof(char), TP_BSIZE) + 1); nonodump = iswap32(spcl.c_level) < honorlevel; initcache(readcache, readblksize); (void)signal(SIGINFO, statussig); msg("mapping (Pass I) [regular files]\n"); anydirskipped = mapfiles(maxino, &tapesize, mountpoint, (dirc ? argv : NULL)); msg("mapping (Pass II) [directories]\n"); while (anydirskipped) { anydirskipped = mapdirs(maxino, &tapesize); } if (pipeout || unlimited) { tapesize += 10; /* 10 trailer blocks */ msg("estimated %llu tape blocks.\n", (unsigned long long)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 = ( 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 %llu tape blocks on %3.2f tape(s).\n", (unsigned long long)tapesize, fetapes); } /* * If the user only wants an estimate of the number of * tapes, exit now. */ if (just_estimate) exit(X_FINOK); /* * Allocate tape buffer. */ if (!alloctape()) quit("can't allocate tape buffers - try a smaller" " blocking factor."); startnewtape(1); (void)time((time_t *)&(tstart_writing)); xferrate = 0; 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 ((DIP(dp, 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 = DIP(dp, mode) & IFMT; if (mode == IFDIR) continue; (void)dumpino(dp, ino); } spcl.c_type = iswap32(TS_END); for (i = 0; i < ntrec; i++) writeheader(maxino - 1); if (pipeout) msg("%lld tape blocks\n",(long long)iswap64(spcl.c_tapea)); else msg("%lld tape blocks on %d volume%s\n", (long long)iswap64(spcl.c_tapea), iswap32(spcl.c_volume), (iswap32(spcl.c_volume) == 1) ? "" : "s"); tnow = do_stats(); date = iswap32(spcl.c_date); msg("Date of this level %c dump: %s", level, spcl.c_date == 0 ? "the epoch\n" : ctime(&date)); msg("Date this dump completed: %s", ctime(&tnow)); msg("Average transfer rate: %d KB/s\n", xferrate / tapeno); putdumptime(); trewind(0); broadcast("DUMP IS DONE!\a\a\n"); #ifdef DUMP_LFS lfs_wrap_go(); #endif /* DUMP_LFS */ msg("DUMP IS DONE\n"); Exit(X_FINOK); /* NOTREACHED */ exit(X_FINOK); /* XXX: to satisfy gcc */ } static void usage(void) { const char *prog = getprogname(); (void)fprintf(stderr, "usage: %s [-0123456789aceFinStuX] [-B records] [-b blocksize]\n" " [-d density] [-f file] [-h level] [-k read-blocksize]\n" " [-L label] [-l timeout] [-r cachesize] [-s feet]\n" " [-T date] [-U dumpdev] [-x snap-backup] files-to-dump\n" " %s [-W | -w]\n", prog, prog); exit(X_STARTUP); } /* * 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(X_STARTUP, "illegal %s -- %s", meaning, optarg); if (val < vmin || (vmax && val > vmax)) errx(X_STARTUP, "%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"); msg("Rewriting attempted as response to signal %s.\n", sys_siglist[signo]); (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 */ } } /* * 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. */ ap = argv[1]; if (argc == 1 || *ap == '-') return; /* Allocate space for new arguments. */ *argvp = nargv = xmalloc((argc + 1) * sizeof(char *)); p = flagsp = xmalloc(strlen(ap) + 2); *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': case 'x': if (*argv == NULL) { warnx("option requires an argument -- %c", *ap); usage(); } nargv[0] = xmalloc(strlen(*argv) + 2 + 1); nargv[0][0] = '-'; nargv[0][1] = *ap; (void)strcpy(&nargv[0][2], *argv); /* XXX safe strcpy */ ++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++) != NULL) ; /* Update argument count. */ *argcp = nargv - *argvp - 1; } void * xcalloc(size_t number, size_t size) { void *p; p = calloc(number, size); if (p == NULL) quite(errno, "Can't allocate %zu bytes", size * number); return (p); } void * xmalloc(size_t size) { void *p; p = malloc(size); if (p == NULL) quite(errno, "Can't allocate %zu bytes", size); return (p); } char * xstrdup(const char *str) { char *p; p = strdup(str); if (p == NULL) quite(errno, "Can't copy %s", str); return (p); }