4.3BSD - /usr/src/bin/dd.c

   1: #ifndef lint
   2: static char *sccsid = "@(#)dd.c	4.4 (Berkeley) 1/22/85";
   3: #endif
   4: 
   5: #include <stdio.h>
   6: #include <signal.h>
   7: 
   8: #define BIG 2147483647
   9: #define LCASE   01
  10: #define UCASE   02
  11: #define SWAB    04
  12: #define NERR    010
  13: #define SYNC    020
  14: int cflag;
  15: int fflag;
  16: int skip;
  17: int seekn;
  18: int count;
  19: int files   = 1;
  20: char    *string;
  21: char    *ifile;
  22: char    *ofile;
  23: char    *ibuf;
  24: char    *obuf;
  25: char    *sbrk();
  26: int ibs = 512;
  27: int obs = 512;
  28: int bs;
  29: int cbs;
  30: int ibc;
  31: int obc;
  32: int cbc;
  33: int nifr;
  34: int nipr;
  35: int nofr;
  36: int nopr;
  37: int ntrunc;
  38: int ibf;
  39: int obf;
  40: char    *op;
  41: int nspace;
  42: char    etoa[] = {
  43:     0000,0001,0002,0003,0234,0011,0206,0177,
  44:     0227,0215,0216,0013,0014,0015,0016,0017,
  45:     0020,0021,0022,0023,0235,0205,0010,0207,
  46:     0030,0031,0222,0217,0034,0035,0036,0037,
  47:     0200,0201,0202,0203,0204,0012,0027,0033,
  48:     0210,0211,0212,0213,0214,0005,0006,0007,
  49:     0220,0221,0026,0223,0224,0225,0226,0004,
  50:     0230,0231,0232,0233,0024,0025,0236,0032,
  51:     0040,0240,0241,0242,0243,0244,0245,0246,
  52:     0247,0250,0133,0056,0074,0050,0053,0041,
  53:     0046,0251,0252,0253,0254,0255,0256,0257,
  54:     0260,0261,0135,0044,0052,0051,0073,0136,
  55:     0055,0057,0262,0263,0264,0265,0266,0267,
  56:     0270,0271,0174,0054,0045,0137,0076,0077,
  57:     0272,0273,0274,0275,0276,0277,0300,0301,
  58:     0302,0140,0072,0043,0100,0047,0075,0042,
  59:     0303,0141,0142,0143,0144,0145,0146,0147,
  60:     0150,0151,0304,0305,0306,0307,0310,0311,
  61:     0312,0152,0153,0154,0155,0156,0157,0160,
  62:     0161,0162,0313,0314,0315,0316,0317,0320,
  63:     0321,0176,0163,0164,0165,0166,0167,0170,
  64:     0171,0172,0322,0323,0324,0325,0326,0327,
  65:     0330,0331,0332,0333,0334,0335,0336,0337,
  66:     0340,0341,0342,0343,0344,0345,0346,0347,
  67:     0173,0101,0102,0103,0104,0105,0106,0107,
  68:     0110,0111,0350,0351,0352,0353,0354,0355,
  69:     0175,0112,0113,0114,0115,0116,0117,0120,
  70:     0121,0122,0356,0357,0360,0361,0362,0363,
  71:     0134,0237,0123,0124,0125,0126,0127,0130,
  72:     0131,0132,0364,0365,0366,0367,0370,0371,
  73:     0060,0061,0062,0063,0064,0065,0066,0067,
  74:     0070,0071,0372,0373,0374,0375,0376,0377,
  75: };
  76: char    atoe[] = {
  77:     0000,0001,0002,0003,0067,0055,0056,0057,
  78:     0026,0005,0045,0013,0014,0015,0016,0017,
  79:     0020,0021,0022,0023,0074,0075,0062,0046,
  80:     0030,0031,0077,0047,0034,0035,0036,0037,
  81:     0100,0117,0177,0173,0133,0154,0120,0175,
  82:     0115,0135,0134,0116,0153,0140,0113,0141,
  83:     0360,0361,0362,0363,0364,0365,0366,0367,
  84:     0370,0371,0172,0136,0114,0176,0156,0157,
  85:     0174,0301,0302,0303,0304,0305,0306,0307,
  86:     0310,0311,0321,0322,0323,0324,0325,0326,
  87:     0327,0330,0331,0342,0343,0344,0345,0346,
  88:     0347,0350,0351,0112,0340,0132,0137,0155,
  89:     0171,0201,0202,0203,0204,0205,0206,0207,
  90:     0210,0211,0221,0222,0223,0224,0225,0226,
  91:     0227,0230,0231,0242,0243,0244,0245,0246,
  92:     0247,0250,0251,0300,0152,0320,0241,0007,
  93:     0040,0041,0042,0043,0044,0025,0006,0027,
  94:     0050,0051,0052,0053,0054,0011,0012,0033,
  95:     0060,0061,0032,0063,0064,0065,0066,0010,
  96:     0070,0071,0072,0073,0004,0024,0076,0341,
  97:     0101,0102,0103,0104,0105,0106,0107,0110,
  98:     0111,0121,0122,0123,0124,0125,0126,0127,
  99:     0130,0131,0142,0143,0144,0145,0146,0147,
 100:     0150,0151,0160,0161,0162,0163,0164,0165,
 101:     0166,0167,0170,0200,0212,0213,0214,0215,
 102:     0216,0217,0220,0232,0233,0234,0235,0236,
 103:     0237,0240,0252,0253,0254,0255,0256,0257,
 104:     0260,0261,0262,0263,0264,0265,0266,0267,
 105:     0270,0271,0272,0273,0274,0275,0276,0277,
 106:     0312,0313,0314,0315,0316,0317,0332,0333,
 107:     0334,0335,0336,0337,0352,0353,0354,0355,
 108:     0356,0357,0372,0373,0374,0375,0376,0377,
 109: };
 110: char    atoibm[] =
 111: {
 112:     0000,0001,0002,0003,0067,0055,0056,0057,
 113:     0026,0005,0045,0013,0014,0015,0016,0017,
 114:     0020,0021,0022,0023,0074,0075,0062,0046,
 115:     0030,0031,0077,0047,0034,0035,0036,0037,
 116:     0100,0132,0177,0173,0133,0154,0120,0175,
 117:     0115,0135,0134,0116,0153,0140,0113,0141,
 118:     0360,0361,0362,0363,0364,0365,0366,0367,
 119:     0370,0371,0172,0136,0114,0176,0156,0157,
 120:     0174,0301,0302,0303,0304,0305,0306,0307,
 121:     0310,0311,0321,0322,0323,0324,0325,0326,
 122:     0327,0330,0331,0342,0343,0344,0345,0346,
 123:     0347,0350,0351,0255,0340,0275,0137,0155,
 124:     0171,0201,0202,0203,0204,0205,0206,0207,
 125:     0210,0211,0221,0222,0223,0224,0225,0226,
 126:     0227,0230,0231,0242,0243,0244,0245,0246,
 127:     0247,0250,0251,0300,0117,0320,0241,0007,
 128:     0040,0041,0042,0043,0044,0025,0006,0027,
 129:     0050,0051,0052,0053,0054,0011,0012,0033,
 130:     0060,0061,0032,0063,0064,0065,0066,0010,
 131:     0070,0071,0072,0073,0004,0024,0076,0341,
 132:     0101,0102,0103,0104,0105,0106,0107,0110,
 133:     0111,0121,0122,0123,0124,0125,0126,0127,
 134:     0130,0131,0142,0143,0144,0145,0146,0147,
 135:     0150,0151,0160,0161,0162,0163,0164,0165,
 136:     0166,0167,0170,0200,0212,0213,0214,0215,
 137:     0216,0217,0220,0232,0233,0234,0235,0236,
 138:     0237,0240,0252,0253,0254,0255,0256,0257,
 139:     0260,0261,0262,0263,0264,0265,0266,0267,
 140:     0270,0271,0272,0273,0274,0275,0276,0277,
 141:     0312,0313,0314,0315,0316,0317,0332,0333,
 142:     0334,0335,0336,0337,0352,0353,0354,0355,
 143:     0356,0357,0372,0373,0374,0375,0376,0377,
 144: };
 145: 
 146: 
 147: main(argc, argv)
 148: int argc;
 149: char    **argv;
 150: {
 151:     int (*conv)();
 152:     register char *ip;
 153:     register c;
 154:     int ebcdic(), ibm(), ascii(), null(), cnull(), term(), block(), unblock();
 155:     int a;
 156: 
 157:     conv = null;
 158:     for(c=1; c<argc; c++) {
 159:         string = argv[c];
 160:         if(match("ibs=")) {
 161:             ibs = number(BIG);
 162:             continue;
 163:         }
 164:         if(match("obs=")) {
 165:             obs = number(BIG);
 166:             continue;
 167:         }
 168:         if(match("cbs=")) {
 169:             cbs = number(BIG);
 170:             continue;
 171:         }
 172:         if (match("bs=")) {
 173:             bs = number(BIG);
 174:             continue;
 175:         }
 176:         if(match("if=")) {
 177:             ifile = string;
 178:             continue;
 179:         }
 180:         if(match("of=")) {
 181:             ofile = string;
 182:             continue;
 183:         }
 184:         if(match("skip=")) {
 185:             skip = number(BIG);
 186:             continue;
 187:         }
 188:         if(match("seek=")) {
 189:             seekn = number(BIG);
 190:             continue;
 191:         }
 192:         if(match("count=")) {
 193:             count = number(BIG);
 194:             continue;
 195:         }
 196:         if(match("files=")) {
 197:             files = number(BIG);
 198:             continue;
 199:         }
 200:         if(match("conv=")) {
 201:         cloop:
 202:             if(match(","))
 203:                 goto cloop;
 204:             if(*string == '\0')
 205:                 continue;
 206:             if(match("ebcdic")) {
 207:                 conv = ebcdic;
 208:                 goto cloop;
 209:             }
 210:             if(match("ibm")) {
 211:                 conv = ibm;
 212:                 goto cloop;
 213:             }
 214:             if(match("ascii")) {
 215:                 conv = ascii;
 216:                 goto cloop;
 217:             }
 218:             if(match("block")) {
 219:                 conv = block;
 220:                 goto cloop;
 221:             }
 222:             if(match("unblock")) {
 223:                 conv = unblock;
 224:                 goto cloop;
 225:             }
 226:             if(match("lcase")) {
 227:                 cflag |= LCASE;
 228:                 goto cloop;
 229:             }
 230:             if(match("ucase")) {
 231:                 cflag |= UCASE;
 232:                 goto cloop;
 233:             }
 234:             if(match("swab")) {
 235:                 cflag |= SWAB;
 236:                 goto cloop;
 237:             }
 238:             if(match("noerror")) {
 239:                 cflag |= NERR;
 240:                 goto cloop;
 241:             }
 242:             if(match("sync")) {
 243:                 cflag |= SYNC;
 244:                 goto cloop;
 245:             }
 246:         }
 247:         fprintf(stderr,"bad arg: %s\n", string);
 248:         exit(1);
 249:     }
 250:     if(conv == null && cflag&(LCASE|UCASE))
 251:         conv = cnull;
 252:     if (ifile)
 253:         ibf = open(ifile, 0);
 254:     else
 255:         ibf = dup(0);
 256:     if(ibf < 0) {
 257:         perror(ifile);
 258:         exit(1);
 259:     }
 260:     if (ofile)
 261:         obf = creat(ofile, 0666);
 262:     else
 263:         obf = dup(1);
 264:     if(obf < 0) {
 265:         fprintf(stderr,"cannot create: %s\n", ofile);
 266:         exit(1);
 267:     }
 268:     if (bs) {
 269:         ibs = obs = bs;
 270:         if (conv == null)
 271:             fflag++;
 272:     }
 273:     if(ibs == 0 || obs == 0) {
 274:         fprintf(stderr,"counts: cannot be zero\n");
 275:         exit(1);
 276:     }
 277:     ibuf = sbrk(ibs);
 278:     if (fflag)
 279:         obuf = ibuf;
 280:     else
 281:         obuf = sbrk(obs);
 282:     sbrk(64);   /* For good measure */
 283:     if(ibuf == (char *)-1 || obuf == (char *)-1) {
 284:         fprintf(stderr, "not enough memory\n");
 285:         exit(1);
 286:     }
 287:     ibc = 0;
 288:     obc = 0;
 289:     cbc = 0;
 290:     op = obuf;
 291: 
 292:     if (signal(SIGINT, SIG_IGN) != SIG_IGN)
 293:         signal(SIGINT, term);
 294:     while(skip) {
 295:         read(ibf, ibuf, ibs);
 296:         skip--;
 297:     }
 298:     while(seekn) {
 299:         lseek(obf, (long)obs, 1);
 300:         seekn--;
 301:     }
 302: 
 303: loop:
 304:     if(ibc-- == 0) {
 305:         ibc = 0;
 306:         if(count==0 || nifr+nipr!=count) {
 307:             if(cflag&(NERR|SYNC))
 308:             for(ip=ibuf+ibs; ip>ibuf;)
 309:                 *--ip = 0;
 310:             ibc = read(ibf, ibuf, ibs);
 311:         }
 312:         if(ibc == -1) {
 313:             perror("read");
 314:             if((cflag&NERR) == 0) {
 315:                 flsh();
 316:                 term();
 317:             }
 318:             ibc = 0;
 319:             for(c=0; c<ibs; c++)
 320:                 if(ibuf[c] != 0)
 321:                     ibc = c;
 322:             stats();
 323:         }
 324:         if(ibc == 0 && --files<=0) {
 325:             flsh();
 326:             term();
 327:         }
 328:         if(ibc != ibs) {
 329:             nipr++;
 330:             if(cflag&SYNC)
 331:                 ibc = ibs;
 332:         } else
 333:             nifr++;
 334:         ip = ibuf;
 335:         c = ibc >> 1;
 336:         if(cflag&SWAB && c)
 337:         do {
 338:             a = *ip++;
 339:             ip[-1] = *ip;
 340:             *ip++ = a;
 341:         } while(--c);
 342:         ip = ibuf;
 343:         if (fflag) {
 344:             obc = ibc;
 345:             flsh();
 346:             ibc = 0;
 347:         }
 348:         goto loop;
 349:     }
 350:     c = 0;
 351:     c |= *ip++;
 352:     c &= 0377;
 353:     (*conv)(c);
 354:     goto loop;
 355: }
 356: 
 357: flsh()
 358: {
 359:     register c;
 360: 
 361:     if(obc) {
 362:         if(obc == obs)
 363:             nofr++; else
 364:             nopr++;
 365:         c = write(obf, obuf, obc);
 366:         if(c != obc) {
 367:             perror("write");
 368:             term();
 369:         }
 370:         obc = 0;
 371:     }
 372: }
 373: 
 374: match(s)
 375: char *s;
 376: {
 377:     register char *cs;
 378: 
 379:     cs = string;
 380:     while(*cs++ == *s)
 381:         if(*s++ == '\0')
 382:             goto true;
 383:     if(*s != '\0')
 384:         return(0);
 385: 
 386: true:
 387:     cs--;
 388:     string = cs;
 389:     return(1);
 390: }
 391: 
 392: number(big)
 393: {
 394:     register char *cs;
 395:     long n;
 396: 
 397:     cs = string;
 398:     n = 0;
 399:     while(*cs >= '0' && *cs <= '9')
 400:         n = n*10 + *cs++ - '0';
 401:     for(;;)
 402:     switch(*cs++) {
 403: 
 404:     case 'k':
 405:         n *= 1024;
 406:         continue;
 407: 
 408:     case 'w':
 409:         n *= sizeof(int);
 410:         continue;
 411: 
 412:     case 'b':
 413:         n *= 512;
 414:         continue;
 415: 
 416:     case '*':
 417:     case 'x':
 418:         string = cs;
 419:         n *= number(BIG);
 420: 
 421:     case '\0':
 422:         if (n>=big || n<0) {
 423:             fprintf(stderr, "dd: argument %D out of range\n", n);
 424:             exit(1);
 425:         }
 426:         return(n);
 427:     }
 428:     /* never gets here */
 429: }
 430: 
 431: cnull(cc)
 432: {
 433:     register c;
 434: 
 435:     c = cc;
 436:     if(cflag&UCASE && c>='a' && c<='z')
 437:         c += 'A'-'a';
 438:     if(cflag&LCASE && c>='A' && c<='Z')
 439:         c += 'a'-'A';
 440:     null(c);
 441: }
 442: 
 443: null(c)
 444: {
 445: 
 446:     *op = c;
 447:     op++;
 448:     if(++obc >= obs) {
 449:         flsh();
 450:         op = obuf;
 451:     }
 452: }
 453: 
 454: ascii(cc)
 455: {
 456:     register c;
 457: 
 458:     c = etoa[cc] & 0377;
 459:     if(cbs == 0) {
 460:         cnull(c);
 461:         return;
 462:     }
 463:     if(c == ' ') {
 464:         nspace++;
 465:         goto out;
 466:     }
 467:     while(nspace > 0) {
 468:         null(' ');
 469:         nspace--;
 470:     }
 471:     cnull(c);
 472: 
 473: out:
 474:     if(++cbc >= cbs) {
 475:         null('\n');
 476:         cbc = 0;
 477:         nspace = 0;
 478:     }
 479: }
 480: 
 481: unblock(cc)
 482: {
 483:     register c;
 484: 
 485:     c = cc & 0377;
 486:     if(cbs == 0) {
 487:         cnull(c);
 488:         return;
 489:     }
 490:     if(c == ' ') {
 491:         nspace++;
 492:         goto out;
 493:     }
 494:     while(nspace > 0) {
 495:         null(' ');
 496:         nspace--;
 497:     }
 498:     cnull(c);
 499: 
 500: out:
 501:     if(++cbc >= cbs) {
 502:         null('\n');
 503:         cbc = 0;
 504:         nspace = 0;
 505:     }
 506: }
 507: 
 508: ebcdic(cc)
 509: {
 510:     register c;
 511: 
 512:     c = cc;
 513:     if(cflag&UCASE && c>='a' && c<='z')
 514:         c += 'A'-'a';
 515:     if(cflag&LCASE && c>='A' && c<='Z')
 516:         c += 'a'-'A';
 517:     c = atoe[c] & 0377;
 518:     if(cbs == 0) {
 519:         null(c);
 520:         return;
 521:     }
 522:     if(cc == '\n') {
 523:         while(cbc < cbs) {
 524:             null(atoe[' ']);
 525:             cbc++;
 526:         }
 527:         cbc = 0;
 528:         return;
 529:     }
 530:     if(cbc == cbs)
 531:         ntrunc++;
 532:     cbc++;
 533:     if(cbc <= cbs)
 534:         null(c);
 535: }
 536: 
 537: ibm(cc)
 538: {
 539:     register c;
 540: 
 541:     c = cc;
 542:     if(cflag&UCASE && c>='a' && c<='z')
 543:         c += 'A'-'a';
 544:     if(cflag&LCASE && c>='A' && c<='Z')
 545:         c += 'a'-'A';
 546:     c = atoibm[c] & 0377;
 547:     if(cbs == 0) {
 548:         null(c);
 549:         return;
 550:     }
 551:     if(cc == '\n') {
 552:         while(cbc < cbs) {
 553:             null(atoibm[' ']);
 554:             cbc++;
 555:         }
 556:         cbc = 0;
 557:         return;
 558:     }
 559:     if(cbc == cbs)
 560:         ntrunc++;
 561:     cbc++;
 562:     if(cbc <= cbs)
 563:         null(c);
 564: }
 565: 
 566: block(cc)
 567: {
 568:     register c;
 569: 
 570:     c = cc;
 571:     if(cflag&UCASE && c>='a' && c<='z')
 572:         c += 'A'-'a';
 573:     if(cflag&LCASE && c>='A' && c<='Z')
 574:         c += 'a'-'A';
 575:     c &= 0377;
 576:     if(cbs == 0) {
 577:         null(c);
 578:         return;
 579:     }
 580:     if(cc == '\n') {
 581:         while(cbc < cbs) {
 582:             null(' ');
 583:             cbc++;
 584:         }
 585:         cbc = 0;
 586:         return;
 587:     }
 588:     if(cbc == cbs)
 589:         ntrunc++;
 590:     cbc++;
 591:     if(cbc <= cbs)
 592:         null(c);
 593: }
 594: 
 595: term()
 596: {
 597: 
 598:     stats();
 599:     exit(0);
 600: }
 601: 
 602: stats()
 603: {
 604: 
 605:     fprintf(stderr,"%u+%u records in\n", nifr, nipr);
 606:     fprintf(stderr,"%u+%u records out\n", nofr, nopr);
 607:     if(ntrunc)
 608:         fprintf(stderr,"%u truncated records\n", ntrunc);
 609: }

Defined functions

Defined variables

Defined macros