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LUNA-II (68040 based LUNA) support
[unix-history] / usr / src / sbin / dump / main.c
/*-
* Copyright (c) 1980, 1991 The Regents of the University of California.
* All rights reserved.
*
* %sccs.include.redist.c%
*/
#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[] = "@(#)main.c 5.26 (Berkeley) %G%";
#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';
argv++;
argc -= 2;
for (cp = *argv++; *cp; 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[32];
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
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.