2.11BSD#431 - /usr/src/sbin/dump/dumpmain.c

   1: #if !defined(lint) && defined(DOSCCS)
   2: static  char *sccsid = "@(#)dumpmain.c	1.4 (2.11BSD GTE) 1996/2/7";
   3: #endif
   4: 
   5: #include "dump.h"
   6: 
   7: long    blocksperfile;
   8: int cartridge = 0;
   9: static  long    numarg();
  10: static  void    missingarg();
  11: 
  12: char    *host = NULL;
  13: 
  14: main(argc, argv)
  15:     int argc;
  16:     char    *argv[];
  17: {
  18:     register char   *cp;
  19:     int i, Tflag = 0, honorlevel = 1, mapsize;
  20:     register struct fstab   *dt;
  21: 
  22:     density = 160;  /* density in 0.1" units */
  23:     time(&(spcl.c_date));
  24: 
  25:     tsize = 0;  /* Default later, based on 'c' option for cart tapes */
  26:     tape = TAPE;
  27:     increm = NINCREM;
  28:     incno = '0';
  29: 
  30:     if (argc == 1) {
  31:         (void) fprintf(stderr, "Must specify a key.\n");
  32:         Exit(X_ABORT);
  33:     }
  34:     argv++;
  35:     argc -= 2;
  36: 
  37:     for (cp = *argv++; *cp; cp++) {
  38:         switch (*cp) {
  39:         case '-':
  40:             break;
  41: 
  42:         case 'w':
  43:             lastdump('w');  /* tell us only what has to be done */
  44:             exit(0);
  45:             break;
  46: 
  47:         case 'W':       /* what to do */
  48:             lastdump('W');  /* tell us state of what is done */
  49:             exit(0);    /* do nothing else */
  50: 
  51:         case 'f':       /* output file */
  52:             if (argc < 1)
  53:                 missingarg('f', "output file");
  54:             tape = *argv++;
  55:             argc--;
  56:             break;
  57: 
  58:         case 'd':       /* density, in bits per inch */
  59:             density = numarg('d', "density",
  60:                 10L, 327670L, &argc, &argv) / 10;
  61:             break;
  62: 
  63:         case 's':           /* tape size, feet */
  64:             tsize = numarg('s', "size",
  65:                 1L, 0L, &argc, &argv) * 12 * 10;
  66:             break;
  67: 
  68:         case 'T':       /* time of last dump */
  69:             if (argc < 1)
  70:                 missingarg('T', "time of last dump");
  71:             spcl.c_ddate = unctime(*argv);
  72:             if (spcl.c_ddate < 0) {
  73:                 (void)fprintf(stderr, "bad time \"%s\"\n",
  74:                     *argv);
  75:                 exit(X_ABORT);
  76:             }
  77:             Tflag = 1;
  78:             lastlevel = '?';
  79:             argc--;
  80:             argv++;
  81:             break;
  82: #ifdef  notnow
  83:         case 'b':       /* blocks per tape write */
  84:             ntrec = numarg('b', "number of blocks per write",
  85:                     1L, 1000L, &argc, &argv);
  86:             break;
  87: #endif
  88: 
  89:         case 'B':       /* blocks per output file */
  90:             blocksperfile = numarg('B', "number of blocks per file",
  91:                     1L, 0L, &argc, &argv);
  92:             break;
  93: 
  94:         case 'c':       /* Tape is cart. not 9-track */
  95:             cartridge = 1;
  96:             break;
  97: 
  98:         /* dump level */
  99:         case '0': case '1': case '2': case '3': case '4':
 100:         case '5': case '6': case '7': case '8': case '9':
 101:             incno = *cp;
 102:             break;
 103: 
 104:         case 'u':           /* update /etc/dumpdates */
 105:             uflag++;
 106:             break;
 107: 
 108:         case 'n':           /* notify operators */
 109:             notify++;
 110:             break;
 111: 
 112:         case 'h':
 113:             honorlevel = numarg('h', "honor level",
 114:                 0L, 10L, &argc, &argv);
 115:             break;
 116: 
 117:         default:
 118:             fprintf(stderr, "bad key '%c%'\n", *cp);
 119:             exit(X_ABORT);
 120:         }
 121:     }
 122:     if (argc < 1) {
 123:         (void)fprintf(stderr, "Must specify disk or filesystem\n");
 124:         exit(X_ABORT);
 125:     }
 126:     disk = *argv++;
 127:     argc--;
 128:     if (argc >= 1) {
 129:         (void)fprintf(stderr, "Unknown arguments to dump:");
 130:         while (argc--)
 131:             (void)fprintf(stderr, " %s", *argv++);
 132:         (void)fprintf(stderr, "\n");
 133:         exit(X_ABORT);
 134:     }
 135:     if (Tflag && uflag) {
 136:             (void)fprintf(stderr,
 137:             "You cannot use the T and u flags together.\n");
 138:         exit(X_ABORT);
 139:     }
 140:     if (strcmp(tape, "-") == 0) {
 141:         pipeout++;
 142:         tape = "standard output";
 143:     }
 144: 
 145:     if (blocksperfile)
 146:         blocksperfile = blocksperfile / NTREC * NTREC; /* round down */
 147:     else {
 148:         /*
 149: 		 * Determine how to default tape size and density
 150: 		 *
 151: 		 *         	density				tape size
 152: 		 * 9-track	1600 bpi (160 bytes/.1")	2300 ft.
 153: 		 * 9-track	6250 bpi (625 bytes/.1")	2300 ft.
 154: 		 * cartridge	8000 bpi (100 bytes/.1")	1700 ft.
 155: 		 *						(450*4 - slop)
 156: 		 */
 157:         if (density == 0)
 158:             density = cartridge ? 100 : 160;
 159:         if (tsize == 0)
 160:             tsize = cartridge ? 1700L*120L : 2300L*120L;
 161:     }
 162: 
 163:     if (index(tape, ':')) {
 164:         host = tape;
 165:         tape = index(host, ':');
 166:         *tape++ = '\0';
 167: #ifdef RDUMP
 168:         if (rmthost(host) == 0)
 169:             exit(X_ABORT);
 170: #else
 171:         (void)fprintf(stderr, "remote dump not enabled\n");
 172:         exit(X_ABORT);
 173: #endif
 174:     }
 175:     (void)setuid(getuid()); /* rmthost() is the only reason to be setuid */
 176: 
 177:     if (signal(SIGHUP, sighup) == SIG_IGN)
 178:         signal(SIGHUP, SIG_IGN);
 179:     if (signal(SIGTRAP, sigtrap) == SIG_IGN)
 180:         signal(SIGTRAP, SIG_IGN);
 181:     if (signal(SIGFPE, sigfpe) == SIG_IGN)
 182:         signal(SIGFPE, SIG_IGN);
 183:     if (signal(SIGBUS, sigbus) == SIG_IGN)
 184:         signal(SIGBUS, SIG_IGN);
 185:     if (signal(SIGSEGV, sigsegv) == SIG_IGN)
 186:         signal(SIGSEGV, SIG_IGN);
 187:     if (signal(SIGTERM, sigterm) == SIG_IGN)
 188:         signal(SIGTERM, SIG_IGN);
 189:     if (signal(SIGINT, interrupt) == SIG_IGN)
 190:         signal(SIGINT, SIG_IGN);
 191: 
 192:     set_operators();    /* /etc/group snarfed */
 193:     /*
 194: 	 *	disk can be either the character or block special file name,
 195: 	 *	or the full file system path name.
 196: 	 */
 197:     if (dt = getfsfile(disk))
 198:         disk = rawname(dt->fs_spec);
 199:     else
 200:         if (dt = getfsspec(disk))
 201:             disk = rawname(disk);
 202:         else
 203:             dt = getfsspec(deraw(disk));
 204: 
 205:     if (!Tflag)
 206:         getitime(); /* /etc/dumpdates snarfed */
 207: 
 208:     msg("Date of this level %c dump: %s\n", incno,
 209:         prdate(spcl.c_date));
 210:     msg("Date of last level %c dump: %s\n", lastlevel,
 211:         prdate(spcl.c_ddate));
 212:     msg("Dumping %s ", disk);
 213:     if (dt != 0)
 214:         msgtail("(%s) ", dt->fs_file);
 215:     if (host)
 216:         msgtail("to %s on host %s\n", tape, host);
 217:     else
 218:         msgtail("to %s\n", tape);
 219: 
 220:     fi = open(disk, 0);
 221:     if (fi < 0) {
 222:         msg("Cannot open %s\n", disk);
 223:         Exit(X_ABORT);
 224:     }
 225:     bzero(clrmap, sizeof (clrmap));
 226:     bzero(dirmap, sizeof (dirmap));
 227:     bzero(nodmap, sizeof (nodmap));
 228:     mapsize = roundup(howmany(sizeof(dirmap),NBBY), DEV_BSIZE);
 229: 
 230:     esize = 0;
 231: 
 232:     nonodump = (incno - '0') < honorlevel;
 233: 
 234:     msg("mapping (Pass I) [regular files]\n");
 235:     pass(mark, (short *)NULL);      /* mark updates esize */
 236: 
 237:     do {
 238:         msg("mapping (Pass II) [directories]\n");
 239:         nadded = 0;
 240:         pass(add, dirmap);
 241:     } while(nadded);
 242: 
 243:     bmapest(clrmap);
 244:     bmapest(nodmap);
 245: 
 246:     if (pipeout) {
 247:         esize += 10;    /* 10 trailer blocks */
 248:         msg("estimated %ld tape blocks.\n", esize);
 249:     } else {
 250:         double fetapes;
 251: 
 252:         if (blocksperfile)
 253:             fetapes = (double) esize / blocksperfile;
 254:         else if (cartridge) {
 255:             /* Estimate number of tapes, assuming streaming stops at
 256: 			   the end of each block written, and not in mid-block.
 257: 			   Assume no erroneous blocks; this can be compensated
 258: 			   for with an artificially low tape size. */
 259:             fetapes =
 260:             (     esize     /* blocks */
 261:                 * DEV_BSIZE /* bytes/block */
 262:                 * (1.0/density) /* 0.1" / byte */
 263:               +
 264:                   esize     /* blocks */
 265:                 * (1.0/NTREC)   /* streaming-stops per block */
 266:                 * 15.48     /* 0.1" / streaming-stop */
 267:             ) * (1.0 / tsize ); /* tape / 0.1" */
 268:         } else {
 269:             /* Estimate number of tapes, for old fashioned 9-track
 270: 			   tape */
 271:             int tenthsperirg = (density == 625) ? 3 : 7;
 272:             fetapes =
 273:             (     esize     /* blocks */
 274:                 * DEV_BSIZE /* bytes / block */
 275:                 * (1.0/density) /* 0.1" / byte */
 276:               +
 277:                   esize     /* blocks */
 278:                 * (1.0/NTREC)   /* IRG's / block */
 279:                 * tenthsperirg  /* 0.1" / IRG */
 280:             ) * (1.0 / tsize ); /* tape / 0.1" */
 281:         }
 282:         etapes = fetapes;       /* truncating assignment */
 283:         etapes++;
 284:         /* count the dumped inodes map on each additional tape */
 285:         esize += (etapes - 1) *
 286:             (howmany(mapsize * sizeof(char), DEV_BSIZE) + 1);
 287:         esize += etapes + 10;   /* headers + 10 trailer blks */
 288:         msg("estimated %ld tape blocks on %3.2f tape(s).\n",
 289:             esize, fetapes);
 290:     }
 291: 
 292:     alloctape();            /* Allocate tape buffer */
 293: 
 294:     otape();            /* bitmap is the first to tape write */
 295:     time(&(tstart_writing));
 296:     bitmap(clrmap, TS_CLRI);
 297: 
 298:     msg("dumping (Pass III) [directories]\n");
 299:     pass(dump, dirmap);
 300: 
 301:     msg("dumping (Pass IV) [regular files]\n");
 302:     pass(dump, nodmap);
 303: 
 304:     spcl.c_type = TS_END;
 305:     for(i=0; i<NTREC; i++)
 306:         spclrec();
 307:     msg("DUMP: %ld tape blocks on %d tape(s)\n",spcl.c_tapea,spcl.c_volume);
 308:     msg("DUMP IS DONE\n");
 309: 
 310:     putitime();
 311:     tape_rewind();
 312:     broadcast("DUMP IS DONE!\7\7\n");
 313:     Exit(X_FINOK);
 314: }
 315: 
 316: /*
 317:  * Pick up a numeric argument.  It must be nonnegative and in the given
 318:  * range (except that a vmax of 0 means unlimited).
 319:  */
 320: static long
 321: numarg(letter, meaning, vmin, vmax, pargc, pargv)
 322:     int letter;
 323:     char *meaning;
 324:     long vmin, vmax;
 325:     int *pargc;
 326:     char ***pargv;
 327: {
 328:     register char *p;
 329:     long val;
 330:     char *str;
 331: 
 332:     if (--*pargc < 0)
 333:         missingarg(letter, meaning);
 334:     str = *(*pargv)++;
 335:     for (p = str; *p; p++)
 336:         if (!isdigit(*p))
 337:             goto bad;
 338:     val = atol(str);
 339:     if (val < vmin || (vmax && val > vmax))
 340:         goto bad;
 341:     return (val);
 342: 
 343: bad:
 344:     (void)fprintf(stderr, "bad '%c' (%s) value \"%s\"\n",
 345:         letter, meaning, str);
 346:     exit(X_ABORT);
 347: /* NOTREACHED */
 348: }
 349: 
 350: static void
 351: missingarg(letter, meaning)
 352:     int letter;
 353:     char *meaning;
 354: {
 355: 
 356:     (void)fprintf(stderr, "The '%c' flag (%s) requires an argument\n",
 357:         letter, meaning);
 358:     exit(X_ABORT);
 359: }
 360: 
 361: int sighup(){   msg("SIGHUP()  try rewriting\n"); sigAbort();}
 362: int sigtrap(){  msg("SIGTRAP()  try rewriting\n"); sigAbort();}
 363: int sigfpe(){   msg("SIGFPE()  try rewriting\n"); sigAbort();}
 364: int sigbus(){   msg("SIGBUS()  try rewriting\n"); sigAbort();}
 365: int sigsegv(){  msg("SIGSEGV()  ABORTING!\n"); abort();}
 366: int sigalrm(){  msg("SIGALRM()  try rewriting\n"); sigAbort();}
 367: int sigterm(){  msg("SIGTERM()  try rewriting\n"); sigAbort();}
 368: 
 369: sigAbort()
 370: {
 371:     if (pipeout) {
 372:         msg("Unknown signal, cannot recover\n");
 373:         dumpabort();
 374:     }
 375:     msg("Rewriting attempted as response to unknown signal.\n");
 376:     fflush(stderr);
 377:     fflush(stdout);
 378:     close_rewind();
 379:     exit(X_REWRITE);
 380: }
 381: 
 382: char *rawname(cp)
 383:     char *cp;
 384: {
 385:     static char rawbuf[32];
 386:     char *dp = rindex(cp, '/');
 387: 
 388:     if (dp == 0)
 389:         return ((char *) 0);
 390:     *dp = '\0';
 391:     strcpy(rawbuf, cp);
 392:     *dp++ = '/';
 393:     strcat(rawbuf, "/r");
 394:     strcat(rawbuf, dp);
 395:     return (rawbuf);
 396: }
 397: 
 398: char *deraw(cp)
 399:     char *cp;
 400: {
 401:     static char rawbuf[32];
 402:     register char *dp;
 403:     register char *tp;
 404: 
 405:     strcpy(rawbuf, cp);
 406: 
 407:     dp = rindex(rawbuf, '/');
 408:     if (dp++ == 0)
 409:         return((char *) 0);
 410: 
 411:     tp = dp++;
 412:     while (*tp++ = *dp++);
 413:     return(rawbuf);
 414: }

Defined functions

Defined variables