2.11BSD/src/sbin/dump/dumpmain.c
#if !defined(lint) && defined(DOSCCS)
static char *sccsid = "@(#)dumpmain.c 1.4 (2.11BSD GTE) 1996/2/7";
#endif
#include "dump.h"
long blocksperfile;
int cartridge = 0;
static long numarg();
static void missingarg();
char *host = NULL;
main(argc, argv)
int argc;
char *argv[];
{
register char *cp;
int i, Tflag = 0, honorlevel = 1, mapsize;
register struct fstab *dt;
density = 160; /* density in 0.1" units */
time(&(spcl.c_date));
tsize = 0; /* Default later, based on 'c' option for cart tapes */
tape = TAPE;
increm = NINCREM;
incno = '0';
if (argc == 1) {
(void) fprintf(stderr, "Must specify a key.\n");
Exit(X_ABORT);
}
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);
break;
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;
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;
#ifdef notnow
case 'b': /* blocks per tape write */
ntrec = numarg('b', "number of blocks per write",
1L, 1000L, &argc, &argv);
break;
#endif
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':
incno = *cp;
break;
case 'u': /* update /etc/dumpdates */
uflag++;
break;
case 'n': /* notify operators */
notify++;
break;
case 'h':
honorlevel = numarg('h', "honor level",
0L, 10L, &argc, &argv);
break;
default:
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, sighup) == SIG_IGN)
signal(SIGHUP, SIG_IGN);
if (signal(SIGTRAP, sigtrap) == SIG_IGN)
signal(SIGTRAP, SIG_IGN);
if (signal(SIGFPE, sigfpe) == SIG_IGN)
signal(SIGFPE, SIG_IGN);
if (signal(SIGBUS, sigbus) == SIG_IGN)
signal(SIGBUS, SIG_IGN);
if (signal(SIGSEGV, sigsegv) == SIG_IGN)
signal(SIGSEGV, SIG_IGN);
if (signal(SIGTERM, sigterm) == SIG_IGN)
signal(SIGTERM, SIG_IGN);
if (signal(SIGINT, interrupt) == SIG_IGN)
signal(SIGINT, SIG_IGN);
set_operators(); /* /etc/group snarfed */
/*
* disk can be either the character or block special file name,
* or the full file system path name.
*/
if (dt = getfsfile(disk))
disk = rawname(dt->fs_spec);
else
if (dt = getfsspec(disk))
disk = rawname(disk);
else
dt = getfsspec(deraw(disk));
if (!Tflag)
getitime(); /* /etc/dumpdates snarfed */
msg("Date of this level %c dump: %s\n", incno,
prdate(spcl.c_date));
msg("Date of last level %c dump: %s\n", lastlevel,
prdate(spcl.c_ddate));
msg("Dumping %s ", disk);
if (dt != 0)
msgtail("(%s) ", dt->fs_file);
if (host)
msgtail("to %s on host %s\n", tape, host);
else
msgtail("to %s\n", tape);
fi = open(disk, 0);
if (fi < 0) {
msg("Cannot open %s\n", disk);
Exit(X_ABORT);
}
bzero(clrmap, sizeof (clrmap));
bzero(dirmap, sizeof (dirmap));
bzero(nodmap, sizeof (nodmap));
mapsize = roundup(howmany(sizeof(dirmap),NBBY), DEV_BSIZE);
esize = 0;
nonodump = (incno - '0') < honorlevel;
msg("mapping (Pass I) [regular files]\n");
pass(mark, (short *)NULL); /* mark updates esize */
do {
msg("mapping (Pass II) [directories]\n");
nadded = 0;
pass(add, dirmap);
} while(nadded);
bmapest(clrmap);
bmapest(nodmap);
if (pipeout) {
esize += 10; /* 10 trailer blocks */
msg("estimated %ld tape blocks.\n", esize);
} else {
double fetapes;
if (blocksperfile)
fetapes = (double) esize / 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 =
( esize /* blocks */
* DEV_BSIZE /* bytes/block */
* (1.0/density) /* 0.1" / byte */
+
esize /* 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 =
( esize /* blocks */
* DEV_BSIZE /* bytes / block */
* (1.0/density) /* 0.1" / byte */
+
esize /* 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 */
esize += (etapes - 1) *
(howmany(mapsize * sizeof(char), DEV_BSIZE) + 1);
esize += etapes + 10; /* headers + 10 trailer blks */
msg("estimated %ld tape blocks on %3.2f tape(s).\n",
esize, fetapes);
}
alloctape(); /* Allocate tape buffer */
otape(); /* bitmap is the first to tape write */
time(&(tstart_writing));
bitmap(clrmap, TS_CLRI);
msg("dumping (Pass III) [directories]\n");
pass(dump, dirmap);
msg("dumping (Pass IV) [regular files]\n");
pass(dump, nodmap);
spcl.c_type = TS_END;
for(i=0; i<NTREC; i++)
spclrec();
msg("DUMP: %ld tape blocks on %d tape(s)\n",spcl.c_tapea,spcl.c_volume);
msg("DUMP IS DONE\n");
putitime();
tape_rewind();
broadcast("DUMP IS DONE!\7\7\n");
Exit(X_FINOK);
}
/*
* 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);
/* NOTREACHED */
}
static void
missingarg(letter, meaning)
int letter;
char *meaning;
{
(void)fprintf(stderr, "The '%c' flag (%s) requires an argument\n",
letter, meaning);
exit(X_ABORT);
}
int sighup(){ msg("SIGHUP() try rewriting\n"); sigAbort();}
int sigtrap(){ msg("SIGTRAP() try rewriting\n"); sigAbort();}
int sigfpe(){ msg("SIGFPE() try rewriting\n"); sigAbort();}
int sigbus(){ msg("SIGBUS() try rewriting\n"); sigAbort();}
int sigsegv(){ msg("SIGSEGV() ABORTING!\n"); abort();}
int sigalrm(){ msg("SIGALRM() try rewriting\n"); sigAbort();}
int sigterm(){ msg("SIGTERM() try rewriting\n"); sigAbort();}
sigAbort()
{
if (pipeout) {
msg("Unknown signal, cannot recover\n");
dumpabort();
}
msg("Rewriting attempted as response to unknown signal.\n");
fflush(stderr);
fflush(stdout);
close_rewind();
exit(X_REWRITE);
}
char *rawname(cp)
char *cp;
{
static char rawbuf[32];
char *dp = rindex(cp, '/');
if (dp == 0)
return ((char *) 0);
*dp = '\0';
strcpy(rawbuf, cp);
*dp++ = '/';
strcat(rawbuf, "/r");
strcat(rawbuf, dp);
return (rawbuf);
}
char *deraw(cp)
char *cp;
{
static char rawbuf[32];
register char *dp;
register char *tp;
strcpy(rawbuf, cp);
dp = rindex(rawbuf, '/');
if (dp++ == 0)
return((char *) 0);
tp = dp++;
while (*tp++ = *dp++);
return(rawbuf);
}