4.3BSD-Tahoe/usr/src/etc/dump/dumpmain.c
/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/
#ifndef lint
static char sccsid[] = "@(#)dumpmain.c 5.6 (Berkeley) 2/23/87";
#endif not lint
#include "dump.h"
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 */
#ifdef RDUMP
char *host;
#endif
int anydskipped; /* set true in mark() if any directories are skipped */
/* this lets us avoid map pass 2 in some cases */
main(argc, argv)
int argc;
char *argv[];
{
char *arg;
int bflag = 0, i;
float fetapes;
register struct fstab *dt;
time(&(spcl.c_date));
tsize = 0; /* Default later, based on 'c' option for cart tapes */
tape = TAPE;
disk = DISK;
increm = NINCREM;
temp = TEMP;
if (TP_BSIZE / DEV_BSIZE == 0 || TP_BSIZE % DEV_BSIZE != 0) {
msg("TP_BSIZE must be a multiple of DEV_BSIZE\n");
dumpabort();
}
incno = '9';
uflag = 0;
arg = "u";
if(argc > 1) {
argv++;
argc--;
arg = *argv;
if (*arg == '-')
argc++;
}
while(*arg)
switch (*arg++) {
case 'w':
lastdump('w'); /* tell us only what has to be done */
exit(0);
break;
case 'W': /* what to do */
lastdump('W'); /* tell us the current state of what has been done */
exit(0); /* do nothing else */
break;
case 'f': /* output file */
if(argc > 1) {
argv++;
argc--;
tape = *argv;
}
break;
case 'd': /* density, in bits per inch */
if (argc > 1) {
argv++;
argc--;
density = atoi(*argv) / 10;
if (density >= 625 && !bflag)
ntrec = HIGHDENSITYTREC;
}
break;
case 's': /* tape size, feet */
if(argc > 1) {
argv++;
argc--;
tsize = atol(*argv);
tsize *= 12L*10L;
}
break;
case 'b': /* blocks per tape write */
if(argc > 1) {
argv++;
argc--;
bflag++;
ntrec = atol(*argv);
}
break;
case 'c': /* Tape is cart. not 9-track */
cartridge++;
break;
case '0': /* dump level */
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
incno = arg[-1];
break;
case 'u': /* update /etc/dumpdates */
uflag++;
break;
case 'n': /* notify operators */
notify++;
break;
default:
fprintf(stderr, "bad key '%c%'\n", arg[-1]);
Exit(X_ABORT);
}
if(argc > 1) {
argv++;
argc--;
disk = *argv;
}
if (strcmp(tape, "-") == 0) {
pipeout++;
tape = "standard output";
}
/*
* 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;
#ifdef RDUMP
{ char *index();
host = tape;
tape = index(host, ':');
if (tape == 0) {
msg("need keyletter ``f'' and device ``host:tape''\n");
exit(1);
}
*tape++ = 0;
if (rmthost(host) == 0)
exit(X_ABORT);
}
setuid(getuid()); /* rmthost() is the only reason to be setuid */
#endif
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 */
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 != 0) {
disk = rawname(dt->fs_spec);
strncpy(spcl.c_dev, dt->fs_spec, NAMELEN);
strncpy(spcl.c_filesys, dt->fs_file, NAMELEN);
} else {
strncpy(spcl.c_dev, disk, NAMELEN);
strncpy(spcl.c_filesys, "an unlisted file system", NAMELEN);
}
strcpy(spcl.c_label, "none");
gethostname(spcl.c_host, NAMELEN);
spcl.c_level = incno - '0';
spcl.c_type = TS_TAPE;
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",
lastincno, prdate(spcl.c_ddate));
msg("Dumping %s ", disk);
if (dt != 0)
msgtail("(%s) ", dt->fs_file);
#ifdef RDUMP
msgtail("to %s on host %s\n", tape, host);
#else
msgtail("to %s\n", tape);
#endif
fi = open(disk, 0);
if (fi < 0) {
msg("Cannot open %s\n", disk);
Exit(X_ABORT);
}
esize = 0;
sblock = (struct fs *)buf;
sync();
bread(SBOFF, sblock, SBSIZE);
if (sblock->fs_magic != FS_MAGIC) {
msg("bad sblock magic number\n");
dumpabort();
}
dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1);
msiz = roundup(howmany(sblock->fs_ipg * sblock->fs_ncg, NBBY),
TP_BSIZE);
clrmap = (char *)calloc(msiz, sizeof(char));
dirmap = (char *)calloc(msiz, sizeof(char));
nodmap = (char *)calloc(msiz, sizeof(char));
anydskipped = 0;
msg("mapping (Pass I) [regular files]\n");
pass(mark, (char *)NULL); /* mark updates esize */
if (anydskipped) {
do {
msg("mapping (Pass II) [directories]\n");
nadded = 0;
pass(add, dirmap);
} while(nadded);
} else /* keep the operators happy */
msg("mapping (Pass II) [directories]\n");
bmapest(clrmap);
bmapest(nodmap);
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 */
* TP_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 */
* TP_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 nodemap on each additional tape */
for (i = 1; i < etapes; i++)
bmapest(nodmap);
esize += i + 10; /* headers + 10 trailer blocks */
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(dirdump, dirmap);
msg("dumping (Pass IV) [regular files]\n");
pass(dump, nodmap);
spcl.c_type = TS_END;
#ifndef RDUMP
for(i=0; i<ntrec; i++)
spclrec();
#endif
msg("DUMP: %ld tape blocks on %d tape(s)\n",spcl.c_tapea,spcl.c_volume);
msg("DUMP IS DONE\n");
putitime();
#ifndef RDUMP
if (!pipeout) {
close(to);
rewind();
}
#else
tflush(1);
rewind();
#endif
broadcast("DUMP IS DONE!\7\7\n");
Exit(X_FINOK);
}
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 *rindex();
char *dp = rindex(cp, '/');
if (dp == 0)
return (0);
*dp = 0;
strcpy(rawbuf, cp);
*dp = '/';
strcat(rawbuf, "/r");
strcat(rawbuf, dp+1);
return (rawbuf);
}