diff options
Diffstat (limited to 'sbin/dump/main.c')
-rw-r--r-- | sbin/dump/main.c | 560 |
1 files changed, 560 insertions, 0 deletions
diff --git a/sbin/dump/main.c b/sbin/dump/main.c new file mode 100644 index 0000000..40d668e --- /dev/null +++ b/sbin/dump/main.c @@ -0,0 +1,560 @@ +/*- + * 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 +static char sccsid[] = "@(#)main.c 8.4 (Berkeley) 4/15/94"; +#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 <errno.h> +#include <fcntl.h> +#include <fstab.h> +#include <signal.h> +#include <stdio.h> +#ifdef __STDC__ +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#endif + +#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) */ + +static long numarg __P((int, char *, long, long, int *, char ***)); +static __dead void missingarg __P((int, char *)); + +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 char *cp; + int i, anydirskipped, bflag = 0, Tflag = 0, honorlevel = 1; + ino_t maxino; + + spcl.c_date = 0; + (void)time((time_t *)&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'; + if (argc == 1) { + (void) fprintf(stderr, "Must specify a key.\n"); + Exit(X_ABORT); + } + argv++; + argc -= 2; + for (cp = *argv++; cp != NULL && *cp != '\0'; cp++) { + switch (*cp) { + case '-': + break; + + 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) + missingarg('f', "output file"); + tape = *argv++; + argc--; + break; + + case 'd': /* density, in bits per inch */ + density = numarg('d', "density", + 10L, 327670L, &argc, &argv) / 10; + if (density >= 625 && !bflag) + ntrec = HIGHDENSITYTREC; + break; + + case 's': /* tape size, feet */ + tsize = numarg('s', "size", + 1L, 0L, &argc, &argv) * 12 * 10; + break; + + case 'T': /* time of last dump */ + if (argc < 1) + missingarg('T', "time of last dump"); + spcl.c_ddate = unctime(*argv); + if (spcl.c_ddate < 0) { + (void)fprintf(stderr, "bad time \"%s\"\n", + *argv); + exit(X_ABORT); + } + Tflag = 1; + lastlevel = '?'; + argc--; + argv++; + break; + + case 'b': /* blocks per tape write */ + ntrec = numarg('b', "number of blocks per write", + 1L, 1000L, &argc, &argv); + break; + + case 'B': /* blocks per output file */ + blocksperfile = numarg('B', "number of blocks per file", + 1L, 0L, &argc, &argv); + break; + + case 'c': /* Tape is cart. not 9-track */ + cartridge = 1; + break; + + /* dump level */ + case '0': case '1': case '2': case '3': case '4': + case '5': case '6': case '7': case '8': case '9': + level = *cp; + break; + + case 'u': /* update /etc/dumpdates */ + uflag = 1; + break; + + case 'n': /* notify operators */ + notify = 1; + break; + + case 'h': + honorlevel = numarg('h', "honor level", + 0L, 10L, &argc, &argv); + break; + + default: + (void)fprintf(stderr, "bad key '%c'\n", *cp); + exit(X_ABORT); + } + } + 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 (index(tape, ':')) { + host = tape; + tape = index(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(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); + + 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 */ +} + +/* + * 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(letter, meaning, vmin, vmax, pargc, pargv) + int letter; + char *meaning; + long vmin, vmax; + int *pargc; + char ***pargv; +{ + register char *p; + long val; + char *str; + + if (--*pargc < 0) + missingarg(letter, meaning); + str = *(*pargv)++; + for (p = str; *p; p++) + if (!isdigit(*p)) + goto bad; + val = atol(str); + if (val < vmin || (vmax && val > vmax)) + goto bad; + return (val); + +bad: + (void)fprintf(stderr, "bad '%c' (%s) value \"%s\"\n", + letter, meaning, str); + exit(X_ABORT); +} + +static __dead void +missingarg(letter, meaning) + int letter; + char *meaning; +{ + + (void)fprintf(stderr, "The '%c' flag (%s) requires an argument\n", + letter, meaning); + exit(X_ABORT); +} + +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 = rindex(cp, '/'); + + if (dp == NULL) + return (NULL); + *dp = '\0'; + (void)strcpy(rawbuf, cp); + *dp = '/'; + (void)strcat(rawbuf, "/r"); + (void)strcat(rawbuf, dp + 1); + return (rawbuf); +} + +#ifdef sunos +const char * +strerror(errnum) + int errnum; +{ + extern int sys_nerr; + extern const char *const sys_errlist[]; + + if (errnum < sys_nerr) + return (sys_errlist[errnum]); + else + return ("bogus errno in strerror"); +} +#endif |