| 1 | /* |
| 2 | * Editor |
| 3 | */ |
| 4 | |
| 5 | #include <signal.h> |
| 6 | #include <sgtty.h> |
| 7 | #include <setjmp.h> |
| 8 | #define NULL 0 |
| 9 | #define FNSIZE 64 |
| 10 | #define LBSIZE 512 |
| 11 | #define ESIZE 128 |
| 12 | #define GBSIZE 256 |
| 13 | #define NBRA 5 |
| 14 | #define EOF -1 |
| 15 | #define KSIZE 9 |
| 16 | |
| 17 | #define CBRA 1 |
| 18 | #define CCHR 2 |
| 19 | #define CDOT 4 |
| 20 | #define CCL 6 |
| 21 | #define NCCL 8 |
| 22 | #define CDOL 10 |
| 23 | #define CEOF 11 |
| 24 | #define CKET 12 |
| 25 | #define CBACK 14 |
| 26 | |
| 27 | #define STAR 01 |
| 28 | |
| 29 | char Q[] = ""; |
| 30 | char T[] = "TMP"; |
| 31 | #define READ 0 |
| 32 | #define WRITE 1 |
| 33 | |
| 34 | int peekc; |
| 35 | int lastc; |
| 36 | char savedfile[FNSIZE]; |
| 37 | char file[FNSIZE]; |
| 38 | char linebuf[LBSIZE]; |
| 39 | char rhsbuf[LBSIZE/2]; |
| 40 | char expbuf[ESIZE+4]; |
| 41 | int circfl; |
| 42 | int *zero; |
| 43 | int *dot; |
| 44 | int *dol; |
| 45 | int *addr1; |
| 46 | int *addr2; |
| 47 | char genbuf[LBSIZE]; |
| 48 | long count; |
| 49 | char *nextip; |
| 50 | char *linebp; |
| 51 | int ninbuf; |
| 52 | int io; |
| 53 | int pflag; |
| 54 | long lseek(); |
| 55 | int (*oldhup)(); |
| 56 | int (*oldquit)(); |
| 57 | int vflag = 1; |
| 58 | int xflag; |
| 59 | int xtflag; |
| 60 | int kflag; |
| 61 | char key[KSIZE + 1]; |
| 62 | char crbuf[512]; |
| 63 | char perm[768]; |
| 64 | char tperm[768]; |
| 65 | int listf; |
| 66 | int col; |
| 67 | char *globp; |
| 68 | int tfile = -1; |
| 69 | int tline; |
| 70 | char *tfname; |
| 71 | char *loc1; |
| 72 | char *loc2; |
| 73 | char *locs; |
| 74 | char ibuff[512]; |
| 75 | int iblock = -1; |
| 76 | char obuff[512]; |
| 77 | int oblock = -1; |
| 78 | int ichanged; |
| 79 | int nleft; |
| 80 | char WRERR[] = "WRITE ERROR"; |
| 81 | int names[26]; |
| 82 | int anymarks; |
| 83 | char *braslist[NBRA]; |
| 84 | char *braelist[NBRA]; |
| 85 | int nbra; |
| 86 | int subnewa; |
| 87 | int subolda; |
| 88 | int fchange; |
| 89 | int wrapp; |
| 90 | unsigned nlall = 128; |
| 91 | |
| 92 | int *address(); |
| 93 | char *getline(); |
| 94 | char *getblock(); |
| 95 | char *place(); |
| 96 | char *mktemp(); |
| 97 | char *malloc(); |
| 98 | char *realloc(); |
| 99 | jmp_buf savej; |
| 100 | |
| 101 | main(argc, argv) |
| 102 | char **argv; |
| 103 | { |
| 104 | register char *p1, *p2; |
| 105 | extern int onintr(), quit(), onhup(); |
| 106 | int (*oldintr)(); |
| 107 | |
| 108 | oldquit = signal(SIGQUIT, SIG_IGN); |
| 109 | oldhup = signal(SIGHUP, SIG_IGN); |
| 110 | oldintr = signal(SIGINT, SIG_IGN); |
| 111 | if ((int)signal(SIGTERM, SIG_IGN) == 0) |
| 112 | signal(SIGTERM, quit); |
| 113 | argv++; |
| 114 | while (argc > 1 && **argv=='-') { |
| 115 | switch((*argv)[1]) { |
| 116 | |
| 117 | case '\0': |
| 118 | vflag = 0; |
| 119 | break; |
| 120 | |
| 121 | case 'q': |
| 122 | signal(SIGQUIT, SIG_DFL); |
| 123 | vflag = 1; |
| 124 | break; |
| 125 | |
| 126 | case 'x': |
| 127 | xflag = 1; |
| 128 | break; |
| 129 | } |
| 130 | argv++; |
| 131 | argc--; |
| 132 | } |
| 133 | if(xflag){ |
| 134 | getkey(); |
| 135 | kflag = crinit(key, perm); |
| 136 | } |
| 137 | |
| 138 | if (argc>1) { |
| 139 | p1 = *argv; |
| 140 | p2 = savedfile; |
| 141 | while (*p2++ = *p1++) |
| 142 | ; |
| 143 | globp = "r"; |
| 144 | } |
| 145 | zero = (int *)malloc(nlall*sizeof(int)); |
| 146 | tfname = mktemp("/tmp/eXXXXX"); |
| 147 | init(); |
| 148 | if (((int)oldintr&01) == 0) |
| 149 | signal(SIGINT, onintr); |
| 150 | if (((int)oldhup&01) == 0) |
| 151 | signal(SIGHUP, onhup); |
| 152 | setjmp(savej); |
| 153 | commands(); |
| 154 | quit(); |
| 155 | } |
| 156 | |
| 157 | commands() |
| 158 | { |
| 159 | int getfile(), gettty(); |
| 160 | register *a1, c; |
| 161 | |
| 162 | for (;;) { |
| 163 | if (pflag) { |
| 164 | pflag = 0; |
| 165 | addr1 = addr2 = dot; |
| 166 | goto print; |
| 167 | } |
| 168 | addr1 = 0; |
| 169 | addr2 = 0; |
| 170 | do { |
| 171 | addr1 = addr2; |
| 172 | if ((a1 = address())==0) { |
| 173 | c = getchr(); |
| 174 | break; |
| 175 | } |
| 176 | addr2 = a1; |
| 177 | if ((c=getchr()) == ';') { |
| 178 | c = ','; |
| 179 | dot = a1; |
| 180 | } |
| 181 | } while (c==','); |
| 182 | if (addr1==0) |
| 183 | addr1 = addr2; |
| 184 | switch(c) { |
| 185 | |
| 186 | case 'a': |
| 187 | setdot(); |
| 188 | newline(); |
| 189 | append(gettty, addr2); |
| 190 | continue; |
| 191 | |
| 192 | case 'c': |
| 193 | delete(); |
| 194 | append(gettty, addr1-1); |
| 195 | continue; |
| 196 | |
| 197 | case 'd': |
| 198 | delete(); |
| 199 | continue; |
| 200 | |
| 201 | case 'E': |
| 202 | fchange = 0; |
| 203 | c = 'e'; |
| 204 | case 'e': |
| 205 | setnoaddr(); |
| 206 | if (vflag && fchange) { |
| 207 | fchange = 0; |
| 208 | error(Q); |
| 209 | } |
| 210 | filename(c); |
| 211 | init(); |
| 212 | addr2 = zero; |
| 213 | goto caseread; |
| 214 | |
| 215 | case 'f': |
| 216 | setnoaddr(); |
| 217 | filename(c); |
| 218 | puts(savedfile); |
| 219 | continue; |
| 220 | |
| 221 | case 'g': |
| 222 | global(1); |
| 223 | continue; |
| 224 | |
| 225 | case 'i': |
| 226 | setdot(); |
| 227 | nonzero(); |
| 228 | newline(); |
| 229 | append(gettty, addr2-1); |
| 230 | continue; |
| 231 | |
| 232 | |
| 233 | case 'j': |
| 234 | if (addr2==0) { |
| 235 | addr1 = dot; |
| 236 | addr2 = dot+1; |
| 237 | } |
| 238 | setdot(); |
| 239 | newline(); |
| 240 | nonzero(); |
| 241 | join(); |
| 242 | continue; |
| 243 | |
| 244 | case 'k': |
| 245 | if ((c = getchr()) < 'a' || c > 'z') |
| 246 | error(Q); |
| 247 | newline(); |
| 248 | setdot(); |
| 249 | nonzero(); |
| 250 | names[c-'a'] = *addr2 & ~01; |
| 251 | anymarks |= 01; |
| 252 | continue; |
| 253 | |
| 254 | case 'm': |
| 255 | move(0); |
| 256 | continue; |
| 257 | |
| 258 | case '\n': |
| 259 | if (addr2==0) |
| 260 | addr2 = dot+1; |
| 261 | addr1 = addr2; |
| 262 | goto print; |
| 263 | |
| 264 | case 'l': |
| 265 | listf++; |
| 266 | case 'p': |
| 267 | case 'P': |
| 268 | newline(); |
| 269 | print: |
| 270 | setdot(); |
| 271 | nonzero(); |
| 272 | a1 = addr1; |
| 273 | do { |
| 274 | puts(getline(*a1++)); |
| 275 | } while (a1 <= addr2); |
| 276 | dot = addr2; |
| 277 | listf = 0; |
| 278 | continue; |
| 279 | |
| 280 | case 'Q': |
| 281 | fchange = 0; |
| 282 | case 'q': |
| 283 | setnoaddr(); |
| 284 | newline(); |
| 285 | quit(); |
| 286 | |
| 287 | case 'r': |
| 288 | filename(c); |
| 289 | caseread: |
| 290 | if ((io = open(file, 0)) < 0) { |
| 291 | lastc = '\n'; |
| 292 | error(file); |
| 293 | } |
| 294 | setall(); |
| 295 | ninbuf = 0; |
| 296 | c = zero != dol; |
| 297 | append(getfile, addr2); |
| 298 | exfile(); |
| 299 | fchange = c; |
| 300 | continue; |
| 301 | |
| 302 | case 's': |
| 303 | setdot(); |
| 304 | nonzero(); |
| 305 | substitute(globp!=0); |
| 306 | continue; |
| 307 | |
| 308 | case 't': |
| 309 | move(1); |
| 310 | continue; |
| 311 | |
| 312 | case 'u': |
| 313 | setdot(); |
| 314 | nonzero(); |
| 315 | newline(); |
| 316 | if ((*addr2&~01) != subnewa) |
| 317 | error(Q); |
| 318 | *addr2 = subolda; |
| 319 | dot = addr2; |
| 320 | continue; |
| 321 | |
| 322 | case 'v': |
| 323 | global(0); |
| 324 | continue; |
| 325 | |
| 326 | case 'W': |
| 327 | wrapp++; |
| 328 | case 'w': |
| 329 | setall(); |
| 330 | nonzero(); |
| 331 | filename(c); |
| 332 | if(!wrapp || |
| 333 | ((io = open(file,1)) == -1) || |
| 334 | ((lseek(io, 0L, 2)) == -1)) |
| 335 | if ((io = creat(file, 0666)) < 0) |
| 336 | error(file); |
| 337 | wrapp = 0; |
| 338 | putfile(); |
| 339 | exfile(); |
| 340 | if (addr1==zero+1 && addr2==dol) |
| 341 | fchange = 0; |
| 342 | continue; |
| 343 | |
| 344 | case 'x': |
| 345 | setnoaddr(); |
| 346 | newline(); |
| 347 | xflag = 1; |
| 348 | puts("Entering encrypting mode!"); |
| 349 | getkey(); |
| 350 | kflag = crinit(key, perm); |
| 351 | continue; |
| 352 | |
| 353 | |
| 354 | case '=': |
| 355 | setall(); |
| 356 | newline(); |
| 357 | count = (addr2-zero)&077777; |
| 358 | putd(); |
| 359 | putchr('\n'); |
| 360 | continue; |
| 361 | |
| 362 | case '!': |
| 363 | callunix(); |
| 364 | continue; |
| 365 | |
| 366 | case EOF: |
| 367 | return; |
| 368 | |
| 369 | } |
| 370 | error(Q); |
| 371 | } |
| 372 | } |
| 373 | |
| 374 | int * |
| 375 | address() |
| 376 | { |
| 377 | register *a1, minus, c; |
| 378 | int n, relerr; |
| 379 | |
| 380 | minus = 0; |
| 381 | a1 = 0; |
| 382 | for (;;) { |
| 383 | c = getchr(); |
| 384 | if ('0'<=c && c<='9') { |
| 385 | n = 0; |
| 386 | do { |
| 387 | n *= 10; |
| 388 | n += c - '0'; |
| 389 | } while ((c = getchr())>='0' && c<='9'); |
| 390 | peekc = c; |
| 391 | if (a1==0) |
| 392 | a1 = zero; |
| 393 | if (minus<0) |
| 394 | n = -n; |
| 395 | a1 += n; |
| 396 | minus = 0; |
| 397 | continue; |
| 398 | } |
| 399 | relerr = 0; |
| 400 | if (a1 || minus) |
| 401 | relerr++; |
| 402 | switch(c) { |
| 403 | case ' ': |
| 404 | case '\t': |
| 405 | continue; |
| 406 | |
| 407 | case '+': |
| 408 | minus++; |
| 409 | if (a1==0) |
| 410 | a1 = dot; |
| 411 | continue; |
| 412 | |
| 413 | case '-': |
| 414 | case '^': |
| 415 | minus--; |
| 416 | if (a1==0) |
| 417 | a1 = dot; |
| 418 | continue; |
| 419 | |
| 420 | case '?': |
| 421 | case '/': |
| 422 | compile(c); |
| 423 | a1 = dot; |
| 424 | for (;;) { |
| 425 | if (c=='/') { |
| 426 | a1++; |
| 427 | if (a1 > dol) |
| 428 | a1 = zero; |
| 429 | } else { |
| 430 | a1--; |
| 431 | if (a1 < zero) |
| 432 | a1 = dol; |
| 433 | } |
| 434 | if (execute(0, a1)) |
| 435 | break; |
| 436 | if (a1==dot) |
| 437 | error(Q); |
| 438 | } |
| 439 | break; |
| 440 | |
| 441 | case '$': |
| 442 | a1 = dol; |
| 443 | break; |
| 444 | |
| 445 | case '.': |
| 446 | a1 = dot; |
| 447 | break; |
| 448 | |
| 449 | case '\'': |
| 450 | if ((c = getchr()) < 'a' || c > 'z') |
| 451 | error(Q); |
| 452 | for (a1=zero; a1<=dol; a1++) |
| 453 | if (names[c-'a'] == (*a1 & ~01)) |
| 454 | break; |
| 455 | break; |
| 456 | |
| 457 | default: |
| 458 | peekc = c; |
| 459 | if (a1==0) |
| 460 | return(0); |
| 461 | a1 += minus; |
| 462 | if (a1<zero || a1>dol) |
| 463 | error(Q); |
| 464 | return(a1); |
| 465 | } |
| 466 | if (relerr) |
| 467 | error(Q); |
| 468 | } |
| 469 | } |
| 470 | |
| 471 | setdot() |
| 472 | { |
| 473 | if (addr2 == 0) |
| 474 | addr1 = addr2 = dot; |
| 475 | if (addr1 > addr2) |
| 476 | error(Q); |
| 477 | } |
| 478 | |
| 479 | setall() |
| 480 | { |
| 481 | if (addr2==0) { |
| 482 | addr1 = zero+1; |
| 483 | addr2 = dol; |
| 484 | if (dol==zero) |
| 485 | addr1 = zero; |
| 486 | } |
| 487 | setdot(); |
| 488 | } |
| 489 | |
| 490 | setnoaddr() |
| 491 | { |
| 492 | if (addr2) |
| 493 | error(Q); |
| 494 | } |
| 495 | |
| 496 | nonzero() |
| 497 | { |
| 498 | if (addr1<=zero || addr2>dol) |
| 499 | error(Q); |
| 500 | } |
| 501 | |
| 502 | newline() |
| 503 | { |
| 504 | register c; |
| 505 | |
| 506 | if ((c = getchr()) == '\n') |
| 507 | return; |
| 508 | if (c=='p' || c=='l') { |
| 509 | pflag++; |
| 510 | if (c=='l') |
| 511 | listf++; |
| 512 | if (getchr() == '\n') |
| 513 | return; |
| 514 | } |
| 515 | error(Q); |
| 516 | } |
| 517 | |
| 518 | filename(comm) |
| 519 | { |
| 520 | register char *p1, *p2; |
| 521 | register c; |
| 522 | |
| 523 | count = 0; |
| 524 | c = getchr(); |
| 525 | if (c=='\n' || c==EOF) { |
| 526 | p1 = savedfile; |
| 527 | if (*p1==0 && comm!='f') |
| 528 | error(Q); |
| 529 | p2 = file; |
| 530 | while (*p2++ = *p1++) |
| 531 | ; |
| 532 | return; |
| 533 | } |
| 534 | if (c!=' ') |
| 535 | error(Q); |
| 536 | while ((c = getchr()) == ' ') |
| 537 | ; |
| 538 | if (c=='\n') |
| 539 | error(Q); |
| 540 | p1 = file; |
| 541 | do { |
| 542 | *p1++ = c; |
| 543 | if (c==' ' || c==EOF) |
| 544 | error(Q); |
| 545 | } while ((c = getchr()) != '\n'); |
| 546 | *p1++ = 0; |
| 547 | if (savedfile[0]==0 || comm=='e' || comm=='f') { |
| 548 | p1 = savedfile; |
| 549 | p2 = file; |
| 550 | while (*p1++ = *p2++) |
| 551 | ; |
| 552 | } |
| 553 | } |
| 554 | |
| 555 | exfile() |
| 556 | { |
| 557 | close(io); |
| 558 | io = -1; |
| 559 | if (vflag) { |
| 560 | putd(); |
| 561 | putchr('\n'); |
| 562 | } |
| 563 | } |
| 564 | |
| 565 | onintr() |
| 566 | { |
| 567 | signal(SIGINT, onintr); |
| 568 | putchr('\n'); |
| 569 | lastc = '\n'; |
| 570 | error(Q); |
| 571 | } |
| 572 | |
| 573 | onhup() |
| 574 | { |
| 575 | signal(SIGINT, SIG_IGN); |
| 576 | signal(SIGHUP, SIG_IGN); |
| 577 | if (dol > zero) { |
| 578 | addr1 = zero+1; |
| 579 | addr2 = dol; |
| 580 | io = creat("ed.hup", 0666); |
| 581 | if (io > 0) |
| 582 | putfile(); |
| 583 | } |
| 584 | fchange = 0; |
| 585 | quit(); |
| 586 | } |
| 587 | |
| 588 | error(s) |
| 589 | char *s; |
| 590 | { |
| 591 | register c; |
| 592 | |
| 593 | wrapp = 0; |
| 594 | listf = 0; |
| 595 | putchr('?'); |
| 596 | puts(s); |
| 597 | count = 0; |
| 598 | lseek(0, (long)0, 2); |
| 599 | pflag = 0; |
| 600 | if (globp) |
| 601 | lastc = '\n'; |
| 602 | globp = 0; |
| 603 | peekc = lastc; |
| 604 | if(lastc) |
| 605 | while ((c = getchr()) != '\n' && c != EOF) |
| 606 | ; |
| 607 | if (io > 0) { |
| 608 | close(io); |
| 609 | io = -1; |
| 610 | } |
| 611 | longjmp(savej, 1); |
| 612 | } |
| 613 | |
| 614 | getchr() |
| 615 | { |
| 616 | char c; |
| 617 | if (lastc=peekc) { |
| 618 | peekc = 0; |
| 619 | return(lastc); |
| 620 | } |
| 621 | if (globp) { |
| 622 | if ((lastc = *globp++) != 0) |
| 623 | return(lastc); |
| 624 | globp = 0; |
| 625 | return(EOF); |
| 626 | } |
| 627 | if (read(0, &c, 1) <= 0) |
| 628 | return(lastc = EOF); |
| 629 | lastc = c&0177; |
| 630 | return(lastc); |
| 631 | } |
| 632 | |
| 633 | gettty() |
| 634 | { |
| 635 | register c; |
| 636 | register char *gf; |
| 637 | register char *p; |
| 638 | |
| 639 | p = linebuf; |
| 640 | gf = globp; |
| 641 | while ((c = getchr()) != '\n') { |
| 642 | if (c==EOF) { |
| 643 | if (gf) |
| 644 | peekc = c; |
| 645 | return(c); |
| 646 | } |
| 647 | if ((c &= 0177) == 0) |
| 648 | continue; |
| 649 | *p++ = c; |
| 650 | if (p >= &linebuf[LBSIZE-2]) |
| 651 | error(Q); |
| 652 | } |
| 653 | *p++ = 0; |
| 654 | if (linebuf[0]=='.' && linebuf[1]==0) |
| 655 | return(EOF); |
| 656 | return(0); |
| 657 | } |
| 658 | |
| 659 | getfile() |
| 660 | { |
| 661 | register c; |
| 662 | register char *lp, *fp; |
| 663 | |
| 664 | lp = linebuf; |
| 665 | fp = nextip; |
| 666 | do { |
| 667 | if (--ninbuf < 0) { |
| 668 | if ((ninbuf = read(io, genbuf, LBSIZE)-1) < 0) |
| 669 | return(EOF); |
| 670 | fp = genbuf; |
| 671 | while(fp < &genbuf[ninbuf]) { |
| 672 | if (*fp++ & 0200) { |
| 673 | if (kflag) |
| 674 | crblock(perm, genbuf, ninbuf+1, count); |
| 675 | break; |
| 676 | } |
| 677 | } |
| 678 | fp = genbuf; |
| 679 | } |
| 680 | c = *fp++; |
| 681 | if (c=='\0') |
| 682 | continue; |
| 683 | if (c&0200 || lp >= &linebuf[LBSIZE]) { |
| 684 | lastc = '\n'; |
| 685 | error(Q); |
| 686 | } |
| 687 | *lp++ = c; |
| 688 | count++; |
| 689 | } while (c != '\n'); |
| 690 | *--lp = 0; |
| 691 | nextip = fp; |
| 692 | return(0); |
| 693 | } |
| 694 | |
| 695 | putfile() |
| 696 | { |
| 697 | int *a1, n; |
| 698 | register char *fp, *lp; |
| 699 | register nib; |
| 700 | |
| 701 | nib = 512; |
| 702 | fp = genbuf; |
| 703 | a1 = addr1; |
| 704 | do { |
| 705 | lp = getline(*a1++); |
| 706 | for (;;) { |
| 707 | if (--nib < 0) { |
| 708 | n = fp-genbuf; |
| 709 | if(kflag) |
| 710 | crblock(perm, genbuf, n, count-n); |
| 711 | if(write(io, genbuf, n) != n) { |
| 712 | puts(WRERR); |
| 713 | error(Q); |
| 714 | } |
| 715 | nib = 511; |
| 716 | fp = genbuf; |
| 717 | } |
| 718 | count++; |
| 719 | if ((*fp++ = *lp++) == 0) { |
| 720 | fp[-1] = '\n'; |
| 721 | break; |
| 722 | } |
| 723 | } |
| 724 | } while (a1 <= addr2); |
| 725 | n = fp-genbuf; |
| 726 | if(kflag) |
| 727 | crblock(perm, genbuf, n, count-n); |
| 728 | if(write(io, genbuf, n) != n) { |
| 729 | puts(WRERR); |
| 730 | error(Q); |
| 731 | } |
| 732 | } |
| 733 | |
| 734 | append(f, a) |
| 735 | int *a; |
| 736 | int (*f)(); |
| 737 | { |
| 738 | register *a1, *a2, *rdot; |
| 739 | int nline, tl; |
| 740 | |
| 741 | nline = 0; |
| 742 | dot = a; |
| 743 | while ((*f)() == 0) { |
| 744 | if ((dol-zero)+1 >= nlall) { |
| 745 | int *ozero = zero; |
| 746 | nlall += 512; |
| 747 | free((char *)zero); |
| 748 | if ((zero = (int *)realloc((char *)zero, nlall*sizeof(int)))==NULL) { |
| 749 | lastc = '\n'; |
| 750 | zero = ozero; |
| 751 | error("MEM?"); |
| 752 | } |
| 753 | dot += zero - ozero; |
| 754 | dol += zero - ozero; |
| 755 | } |
| 756 | tl = putline(); |
| 757 | nline++; |
| 758 | a1 = ++dol; |
| 759 | a2 = a1+1; |
| 760 | rdot = ++dot; |
| 761 | while (a1 > rdot) |
| 762 | *--a2 = *--a1; |
| 763 | *rdot = tl; |
| 764 | } |
| 765 | return(nline); |
| 766 | } |
| 767 | |
| 768 | callunix() |
| 769 | { |
| 770 | register (*savint)(), pid, rpid; |
| 771 | int retcode; |
| 772 | |
| 773 | setnoaddr(); |
| 774 | if ((pid = fork()) == 0) { |
| 775 | signal(SIGHUP, oldhup); |
| 776 | signal(SIGQUIT, oldquit); |
| 777 | execl("/bin/sh", "sh", "-t", 0); |
| 778 | exit(0100); |
| 779 | } |
| 780 | savint = signal(SIGINT, SIG_IGN); |
| 781 | while ((rpid = wait(&retcode)) != pid && rpid != -1) |
| 782 | ; |
| 783 | signal(SIGINT, savint); |
| 784 | puts("!"); |
| 785 | } |
| 786 | |
| 787 | quit() |
| 788 | { |
| 789 | if (vflag && fchange && dol!=zero) { |
| 790 | fchange = 0; |
| 791 | error(Q); |
| 792 | } |
| 793 | unlink(tfname); |
| 794 | exit(0); |
| 795 | } |
| 796 | |
| 797 | delete() |
| 798 | { |
| 799 | setdot(); |
| 800 | newline(); |
| 801 | nonzero(); |
| 802 | rdelete(addr1, addr2); |
| 803 | } |
| 804 | |
| 805 | rdelete(ad1, ad2) |
| 806 | int *ad1, *ad2; |
| 807 | { |
| 808 | register *a1, *a2, *a3; |
| 809 | |
| 810 | a1 = ad1; |
| 811 | a2 = ad2+1; |
| 812 | a3 = dol; |
| 813 | dol -= a2 - a1; |
| 814 | do { |
| 815 | *a1++ = *a2++; |
| 816 | } while (a2 <= a3); |
| 817 | a1 = ad1; |
| 818 | if (a1 > dol) |
| 819 | a1 = dol; |
| 820 | dot = a1; |
| 821 | fchange = 1; |
| 822 | } |
| 823 | |
| 824 | gdelete() |
| 825 | { |
| 826 | register *a1, *a2, *a3; |
| 827 | |
| 828 | a3 = dol; |
| 829 | for (a1=zero+1; (*a1&01)==0; a1++) |
| 830 | if (a1>=a3) |
| 831 | return; |
| 832 | for (a2=a1+1; a2<=a3;) { |
| 833 | if (*a2&01) { |
| 834 | a2++; |
| 835 | dot = a1; |
| 836 | } else |
| 837 | *a1++ = *a2++; |
| 838 | } |
| 839 | dol = a1-1; |
| 840 | if (dot>dol) |
| 841 | dot = dol; |
| 842 | fchange = 1; |
| 843 | } |
| 844 | |
| 845 | char * |
| 846 | getline(tl) |
| 847 | { |
| 848 | register char *bp, *lp; |
| 849 | register nl; |
| 850 | |
| 851 | lp = linebuf; |
| 852 | bp = getblock(tl, READ); |
| 853 | nl = nleft; |
| 854 | tl &= ~0377; |
| 855 | while (*lp++ = *bp++) |
| 856 | if (--nl == 0) { |
| 857 | bp = getblock(tl+=0400, READ); |
| 858 | nl = nleft; |
| 859 | } |
| 860 | return(linebuf); |
| 861 | } |
| 862 | |
| 863 | putline() |
| 864 | { |
| 865 | register char *bp, *lp; |
| 866 | register nl; |
| 867 | int tl; |
| 868 | |
| 869 | fchange = 1; |
| 870 | lp = linebuf; |
| 871 | tl = tline; |
| 872 | bp = getblock(tl, WRITE); |
| 873 | nl = nleft; |
| 874 | tl &= ~0377; |
| 875 | while (*bp = *lp++) { |
| 876 | if (*bp++ == '\n') { |
| 877 | *--bp = 0; |
| 878 | linebp = lp; |
| 879 | break; |
| 880 | } |
| 881 | if (--nl == 0) { |
| 882 | bp = getblock(tl+=0400, WRITE); |
| 883 | nl = nleft; |
| 884 | } |
| 885 | } |
| 886 | nl = tline; |
| 887 | tline += (((lp-linebuf)+03)>>1)&077776; |
| 888 | return(nl); |
| 889 | } |
| 890 | |
| 891 | char * |
| 892 | getblock(atl, iof) |
| 893 | { |
| 894 | extern read(), write(); |
| 895 | register bno, off; |
| 896 | register char *p1, *p2; |
| 897 | register int n; |
| 898 | |
| 899 | bno = (atl>>8)&0377; |
| 900 | off = (atl<<1)&0774; |
| 901 | if (bno >= 255) { |
| 902 | lastc = '\n'; |
| 903 | error(T); |
| 904 | } |
| 905 | nleft = 512 - off; |
| 906 | if (bno==iblock) { |
| 907 | ichanged |= iof; |
| 908 | return(ibuff+off); |
| 909 | } |
| 910 | if (bno==oblock) |
| 911 | return(obuff+off); |
| 912 | if (iof==READ) { |
| 913 | if (ichanged) { |
| 914 | if(xtflag) |
| 915 | crblock(tperm, ibuff, 512, (long)0); |
| 916 | blkio(iblock, ibuff, write); |
| 917 | } |
| 918 | ichanged = 0; |
| 919 | iblock = bno; |
| 920 | blkio(bno, ibuff, read); |
| 921 | if(xtflag) |
| 922 | crblock(tperm, ibuff, 512, (long)0); |
| 923 | return(ibuff+off); |
| 924 | } |
| 925 | if (oblock>=0) { |
| 926 | if(xtflag) { |
| 927 | p1 = obuff; |
| 928 | p2 = crbuf; |
| 929 | n = 512; |
| 930 | while(n--) |
| 931 | *p2++ = *p1++; |
| 932 | crblock(tperm, crbuf, 512, (long)0); |
| 933 | blkio(oblock, crbuf, write); |
| 934 | } else |
| 935 | blkio(oblock, obuff, write); |
| 936 | } |
| 937 | oblock = bno; |
| 938 | return(obuff+off); |
| 939 | } |
| 940 | |
| 941 | blkio(b, buf, iofcn) |
| 942 | char *buf; |
| 943 | int (*iofcn)(); |
| 944 | { |
| 945 | lseek(tfile, (long)b<<9, 0); |
| 946 | if ((*iofcn)(tfile, buf, 512) != 512) { |
| 947 | error(T); |
| 948 | } |
| 949 | } |
| 950 | |
| 951 | init() |
| 952 | { |
| 953 | register *markp; |
| 954 | |
| 955 | close(tfile); |
| 956 | tline = 2; |
| 957 | for (markp = names; markp < &names[26]; ) |
| 958 | *markp++ = 0; |
| 959 | subnewa = 0; |
| 960 | anymarks = 0; |
| 961 | iblock = -1; |
| 962 | oblock = -1; |
| 963 | ichanged = 0; |
| 964 | close(creat(tfname, 0600)); |
| 965 | tfile = open(tfname, 2); |
| 966 | if(xflag) { |
| 967 | xtflag = 1; |
| 968 | makekey(key, tperm); |
| 969 | } |
| 970 | dot = dol = zero; |
| 971 | } |
| 972 | |
| 973 | global(k) |
| 974 | { |
| 975 | register char *gp; |
| 976 | register c; |
| 977 | register int *a1; |
| 978 | char globuf[GBSIZE]; |
| 979 | |
| 980 | if (globp) |
| 981 | error(Q); |
| 982 | setall(); |
| 983 | nonzero(); |
| 984 | if ((c=getchr())=='\n') |
| 985 | error(Q); |
| 986 | compile(c); |
| 987 | gp = globuf; |
| 988 | while ((c = getchr()) != '\n') { |
| 989 | if (c==EOF) |
| 990 | error(Q); |
| 991 | if (c=='\\') { |
| 992 | c = getchr(); |
| 993 | if (c!='\n') |
| 994 | *gp++ = '\\'; |
| 995 | } |
| 996 | *gp++ = c; |
| 997 | if (gp >= &globuf[GBSIZE-2]) |
| 998 | error(Q); |
| 999 | } |
| 1000 | *gp++ = '\n'; |
| 1001 | *gp++ = 0; |
| 1002 | for (a1=zero; a1<=dol; a1++) { |
| 1003 | *a1 &= ~01; |
| 1004 | if (a1>=addr1 && a1<=addr2 && execute(0, a1)==k) |
| 1005 | *a1 |= 01; |
| 1006 | } |
| 1007 | /* |
| 1008 | * Special case: g/.../d (avoid n^2 algorithm) |
| 1009 | */ |
| 1010 | if (globuf[0]=='d' && globuf[1]=='\n' && globuf[2]=='\0') { |
| 1011 | gdelete(); |
| 1012 | return; |
| 1013 | } |
| 1014 | for (a1=zero; a1<=dol; a1++) { |
| 1015 | if (*a1 & 01) { |
| 1016 | *a1 &= ~01; |
| 1017 | dot = a1; |
| 1018 | globp = globuf; |
| 1019 | commands(); |
| 1020 | a1 = zero; |
| 1021 | } |
| 1022 | } |
| 1023 | } |
| 1024 | |
| 1025 | join() |
| 1026 | { |
| 1027 | register char *gp, *lp; |
| 1028 | register *a1; |
| 1029 | |
| 1030 | gp = genbuf; |
| 1031 | for (a1=addr1; a1<=addr2; a1++) { |
| 1032 | lp = getline(*a1); |
| 1033 | while (*gp = *lp++) |
| 1034 | if (gp++ >= &genbuf[LBSIZE-2]) |
| 1035 | error(Q); |
| 1036 | } |
| 1037 | lp = linebuf; |
| 1038 | gp = genbuf; |
| 1039 | while (*lp++ = *gp++) |
| 1040 | ; |
| 1041 | *addr1 = putline(); |
| 1042 | if (addr1<addr2) |
| 1043 | rdelete(addr1+1, addr2); |
| 1044 | dot = addr1; |
| 1045 | } |
| 1046 | |
| 1047 | substitute(inglob) |
| 1048 | { |
| 1049 | register *markp, *a1, nl; |
| 1050 | int gsubf; |
| 1051 | int getsub(); |
| 1052 | |
| 1053 | gsubf = compsub(); |
| 1054 | for (a1 = addr1; a1 <= addr2; a1++) { |
| 1055 | int *ozero; |
| 1056 | if (execute(0, a1)==0) |
| 1057 | continue; |
| 1058 | inglob |= 01; |
| 1059 | dosub(); |
| 1060 | if (gsubf) { |
| 1061 | while (*loc2) { |
| 1062 | if (execute(1, (int *)0)==0) |
| 1063 | break; |
| 1064 | dosub(); |
| 1065 | } |
| 1066 | } |
| 1067 | subnewa = putline(); |
| 1068 | *a1 &= ~01; |
| 1069 | if (anymarks) { |
| 1070 | for (markp = names; markp < &names[26]; markp++) |
| 1071 | if (*markp == *a1) |
| 1072 | *markp = subnewa; |
| 1073 | } |
| 1074 | subolda = *a1; |
| 1075 | *a1 = subnewa; |
| 1076 | ozero = zero; |
| 1077 | nl = append(getsub, a1); |
| 1078 | nl += zero-ozero; |
| 1079 | a1 += nl; |
| 1080 | addr2 += nl; |
| 1081 | } |
| 1082 | if (inglob==0) |
| 1083 | error(Q); |
| 1084 | } |
| 1085 | |
| 1086 | compsub() |
| 1087 | { |
| 1088 | register seof, c; |
| 1089 | register char *p; |
| 1090 | |
| 1091 | if ((seof = getchr()) == '\n' || seof == ' ') |
| 1092 | error(Q); |
| 1093 | compile(seof); |
| 1094 | p = rhsbuf; |
| 1095 | for (;;) { |
| 1096 | c = getchr(); |
| 1097 | if (c=='\\') |
| 1098 | c = getchr() | 0200; |
| 1099 | if (c=='\n') { |
| 1100 | if (globp) |
| 1101 | c |= 0200; |
| 1102 | else |
| 1103 | error(Q); |
| 1104 | } |
| 1105 | if (c==seof) |
| 1106 | break; |
| 1107 | *p++ = c; |
| 1108 | if (p >= &rhsbuf[LBSIZE/2]) |
| 1109 | error(Q); |
| 1110 | } |
| 1111 | *p++ = 0; |
| 1112 | if ((peekc = getchr()) == 'g') { |
| 1113 | peekc = 0; |
| 1114 | newline(); |
| 1115 | return(1); |
| 1116 | } |
| 1117 | newline(); |
| 1118 | return(0); |
| 1119 | } |
| 1120 | |
| 1121 | getsub() |
| 1122 | { |
| 1123 | register char *p1, *p2; |
| 1124 | |
| 1125 | p1 = linebuf; |
| 1126 | if ((p2 = linebp) == 0) |
| 1127 | return(EOF); |
| 1128 | while (*p1++ = *p2++) |
| 1129 | ; |
| 1130 | linebp = 0; |
| 1131 | return(0); |
| 1132 | } |
| 1133 | |
| 1134 | dosub() |
| 1135 | { |
| 1136 | register char *lp, *sp, *rp; |
| 1137 | int c; |
| 1138 | |
| 1139 | lp = linebuf; |
| 1140 | sp = genbuf; |
| 1141 | rp = rhsbuf; |
| 1142 | while (lp < loc1) |
| 1143 | *sp++ = *lp++; |
| 1144 | while (c = *rp++&0377) { |
| 1145 | if (c=='&') { |
| 1146 | sp = place(sp, loc1, loc2); |
| 1147 | continue; |
| 1148 | } else if (c&0200 && (c &= 0177) >='1' && c < nbra+'1') { |
| 1149 | sp = place(sp, braslist[c-'1'], braelist[c-'1']); |
| 1150 | continue; |
| 1151 | } |
| 1152 | *sp++ = c&0177; |
| 1153 | if (sp >= &genbuf[LBSIZE]) |
| 1154 | error(Q); |
| 1155 | } |
| 1156 | lp = loc2; |
| 1157 | loc2 = sp - genbuf + linebuf; |
| 1158 | while (*sp++ = *lp++) |
| 1159 | if (sp >= &genbuf[LBSIZE]) |
| 1160 | error(Q); |
| 1161 | lp = linebuf; |
| 1162 | sp = genbuf; |
| 1163 | while (*lp++ = *sp++) |
| 1164 | ; |
| 1165 | } |
| 1166 | |
| 1167 | char * |
| 1168 | place(sp, l1, l2) |
| 1169 | register char *sp, *l1, *l2; |
| 1170 | { |
| 1171 | |
| 1172 | while (l1 < l2) { |
| 1173 | *sp++ = *l1++; |
| 1174 | if (sp >= &genbuf[LBSIZE]) |
| 1175 | error(Q); |
| 1176 | } |
| 1177 | return(sp); |
| 1178 | } |
| 1179 | |
| 1180 | move(cflag) |
| 1181 | { |
| 1182 | register int *adt, *ad1, *ad2; |
| 1183 | int getcopy(); |
| 1184 | |
| 1185 | setdot(); |
| 1186 | nonzero(); |
| 1187 | if ((adt = address())==0) |
| 1188 | error(Q); |
| 1189 | newline(); |
| 1190 | if (cflag) { |
| 1191 | int *ozero, delta; |
| 1192 | ad1 = dol; |
| 1193 | ozero = zero; |
| 1194 | append(getcopy, ad1++); |
| 1195 | ad2 = dol; |
| 1196 | delta = zero - ozero; |
| 1197 | ad1 += delta; |
| 1198 | adt += delta; |
| 1199 | } else { |
| 1200 | ad2 = addr2; |
| 1201 | for (ad1 = addr1; ad1 <= ad2;) |
| 1202 | *ad1++ &= ~01; |
| 1203 | ad1 = addr1; |
| 1204 | } |
| 1205 | ad2++; |
| 1206 | if (adt<ad1) { |
| 1207 | dot = adt + (ad2-ad1); |
| 1208 | if ((++adt)==ad1) |
| 1209 | return; |
| 1210 | reverse(adt, ad1); |
| 1211 | reverse(ad1, ad2); |
| 1212 | reverse(adt, ad2); |
| 1213 | } else if (adt >= ad2) { |
| 1214 | dot = adt++; |
| 1215 | reverse(ad1, ad2); |
| 1216 | reverse(ad2, adt); |
| 1217 | reverse(ad1, adt); |
| 1218 | } else |
| 1219 | error(Q); |
| 1220 | fchange = 1; |
| 1221 | } |
| 1222 | |
| 1223 | reverse(a1, a2) |
| 1224 | register int *a1, *a2; |
| 1225 | { |
| 1226 | register int t; |
| 1227 | |
| 1228 | for (;;) { |
| 1229 | t = *--a2; |
| 1230 | if (a2 <= a1) |
| 1231 | return; |
| 1232 | *a2 = *a1; |
| 1233 | *a1++ = t; |
| 1234 | } |
| 1235 | } |
| 1236 | |
| 1237 | getcopy() |
| 1238 | { |
| 1239 | if (addr1 > addr2) |
| 1240 | return(EOF); |
| 1241 | getline(*addr1++); |
| 1242 | return(0); |
| 1243 | } |
| 1244 | |
| 1245 | compile(aeof) |
| 1246 | { |
| 1247 | register eof, c; |
| 1248 | register char *ep; |
| 1249 | char *lastep; |
| 1250 | char bracket[NBRA], *bracketp; |
| 1251 | int cclcnt; |
| 1252 | |
| 1253 | ep = expbuf; |
| 1254 | eof = aeof; |
| 1255 | bracketp = bracket; |
| 1256 | if ((c = getchr()) == eof) { |
| 1257 | if (*ep==0) |
| 1258 | error(Q); |
| 1259 | return; |
| 1260 | } |
| 1261 | circfl = 0; |
| 1262 | nbra = 0; |
| 1263 | if (c=='^') { |
| 1264 | c = getchr(); |
| 1265 | circfl++; |
| 1266 | } |
| 1267 | peekc = c; |
| 1268 | lastep = 0; |
| 1269 | for (;;) { |
| 1270 | if (ep >= &expbuf[ESIZE]) |
| 1271 | goto cerror; |
| 1272 | c = getchr(); |
| 1273 | if (c==eof) { |
| 1274 | if (bracketp != bracket) |
| 1275 | goto cerror; |
| 1276 | *ep++ = CEOF; |
| 1277 | return; |
| 1278 | } |
| 1279 | if (c!='*') |
| 1280 | lastep = ep; |
| 1281 | switch (c) { |
| 1282 | |
| 1283 | case '\\': |
| 1284 | if ((c = getchr())=='(') { |
| 1285 | if (nbra >= NBRA) |
| 1286 | goto cerror; |
| 1287 | *bracketp++ = nbra; |
| 1288 | *ep++ = CBRA; |
| 1289 | *ep++ = nbra++; |
| 1290 | continue; |
| 1291 | } |
| 1292 | if (c == ')') { |
| 1293 | if (bracketp <= bracket) |
| 1294 | goto cerror; |
| 1295 | *ep++ = CKET; |
| 1296 | *ep++ = *--bracketp; |
| 1297 | continue; |
| 1298 | } |
| 1299 | if (c>='1' && c<'1'+NBRA) { |
| 1300 | *ep++ = CBACK; |
| 1301 | *ep++ = c-'1'; |
| 1302 | continue; |
| 1303 | } |
| 1304 | *ep++ = CCHR; |
| 1305 | if (c=='\n') |
| 1306 | goto cerror; |
| 1307 | *ep++ = c; |
| 1308 | continue; |
| 1309 | |
| 1310 | case '.': |
| 1311 | *ep++ = CDOT; |
| 1312 | continue; |
| 1313 | |
| 1314 | case '\n': |
| 1315 | goto cerror; |
| 1316 | |
| 1317 | case '*': |
| 1318 | if (lastep==0 || *lastep==CBRA || *lastep==CKET) |
| 1319 | goto defchar; |
| 1320 | *lastep |= STAR; |
| 1321 | continue; |
| 1322 | |
| 1323 | case '$': |
| 1324 | if ((peekc=getchr()) != eof) |
| 1325 | goto defchar; |
| 1326 | *ep++ = CDOL; |
| 1327 | continue; |
| 1328 | |
| 1329 | case '[': |
| 1330 | *ep++ = CCL; |
| 1331 | *ep++ = 0; |
| 1332 | cclcnt = 1; |
| 1333 | if ((c=getchr()) == '^') { |
| 1334 | c = getchr(); |
| 1335 | ep[-2] = NCCL; |
| 1336 | } |
| 1337 | do { |
| 1338 | if (c=='\n') |
| 1339 | goto cerror; |
| 1340 | if (c=='-' && ep[-1]!=0) { |
| 1341 | if ((c=getchr())==']') { |
| 1342 | *ep++ = '-'; |
| 1343 | cclcnt++; |
| 1344 | break; |
| 1345 | } |
| 1346 | while (ep[-1]<c) { |
| 1347 | *ep = ep[-1]+1; |
| 1348 | ep++; |
| 1349 | cclcnt++; |
| 1350 | if (ep>=&expbuf[ESIZE]) |
| 1351 | goto cerror; |
| 1352 | } |
| 1353 | } |
| 1354 | *ep++ = c; |
| 1355 | cclcnt++; |
| 1356 | if (ep >= &expbuf[ESIZE]) |
| 1357 | goto cerror; |
| 1358 | } while ((c = getchr()) != ']'); |
| 1359 | lastep[1] = cclcnt; |
| 1360 | continue; |
| 1361 | |
| 1362 | defchar: |
| 1363 | default: |
| 1364 | *ep++ = CCHR; |
| 1365 | *ep++ = c; |
| 1366 | } |
| 1367 | } |
| 1368 | cerror: |
| 1369 | expbuf[0] = 0; |
| 1370 | nbra = 0; |
| 1371 | error(Q); |
| 1372 | } |
| 1373 | |
| 1374 | execute(gf, addr) |
| 1375 | int *addr; |
| 1376 | { |
| 1377 | register char *p1, *p2, c; |
| 1378 | |
| 1379 | for (c=0; c<NBRA; c++) { |
| 1380 | braslist[c] = 0; |
| 1381 | braelist[c] = 0; |
| 1382 | } |
| 1383 | if (gf) { |
| 1384 | if (circfl) |
| 1385 | return(0); |
| 1386 | p1 = linebuf; |
| 1387 | p2 = genbuf; |
| 1388 | while (*p1++ = *p2++) |
| 1389 | ; |
| 1390 | locs = p1 = loc2; |
| 1391 | } else { |
| 1392 | if (addr==zero) |
| 1393 | return(0); |
| 1394 | p1 = getline(*addr); |
| 1395 | locs = 0; |
| 1396 | } |
| 1397 | p2 = expbuf; |
| 1398 | if (circfl) { |
| 1399 | loc1 = p1; |
| 1400 | return(advance(p1, p2)); |
| 1401 | } |
| 1402 | /* fast check for first character */ |
| 1403 | if (*p2==CCHR) { |
| 1404 | c = p2[1]; |
| 1405 | do { |
| 1406 | if (*p1!=c) |
| 1407 | continue; |
| 1408 | if (advance(p1, p2)) { |
| 1409 | loc1 = p1; |
| 1410 | return(1); |
| 1411 | } |
| 1412 | } while (*p1++); |
| 1413 | return(0); |
| 1414 | } |
| 1415 | /* regular algorithm */ |
| 1416 | do { |
| 1417 | if (advance(p1, p2)) { |
| 1418 | loc1 = p1; |
| 1419 | return(1); |
| 1420 | } |
| 1421 | } while (*p1++); |
| 1422 | return(0); |
| 1423 | } |
| 1424 | |
| 1425 | advance(lp, ep) |
| 1426 | register char *ep, *lp; |
| 1427 | { |
| 1428 | register char *curlp; |
| 1429 | int i; |
| 1430 | |
| 1431 | for (;;) switch (*ep++) { |
| 1432 | |
| 1433 | case CCHR: |
| 1434 | if (*ep++ == *lp++) |
| 1435 | continue; |
| 1436 | return(0); |
| 1437 | |
| 1438 | case CDOT: |
| 1439 | if (*lp++) |
| 1440 | continue; |
| 1441 | return(0); |
| 1442 | |
| 1443 | case CDOL: |
| 1444 | if (*lp==0) |
| 1445 | continue; |
| 1446 | return(0); |
| 1447 | |
| 1448 | case CEOF: |
| 1449 | loc2 = lp; |
| 1450 | return(1); |
| 1451 | |
| 1452 | case CCL: |
| 1453 | if (cclass(ep, *lp++, 1)) { |
| 1454 | ep += *ep; |
| 1455 | continue; |
| 1456 | } |
| 1457 | return(0); |
| 1458 | |
| 1459 | case NCCL: |
| 1460 | if (cclass(ep, *lp++, 0)) { |
| 1461 | ep += *ep; |
| 1462 | continue; |
| 1463 | } |
| 1464 | return(0); |
| 1465 | |
| 1466 | case CBRA: |
| 1467 | braslist[*ep++] = lp; |
| 1468 | continue; |
| 1469 | |
| 1470 | case CKET: |
| 1471 | braelist[*ep++] = lp; |
| 1472 | continue; |
| 1473 | |
| 1474 | case CBACK: |
| 1475 | if (braelist[i = *ep++]==0) |
| 1476 | error(Q); |
| 1477 | if (backref(i, lp)) { |
| 1478 | lp += braelist[i] - braslist[i]; |
| 1479 | continue; |
| 1480 | } |
| 1481 | return(0); |
| 1482 | |
| 1483 | case CBACK|STAR: |
| 1484 | if (braelist[i = *ep++] == 0) |
| 1485 | error(Q); |
| 1486 | curlp = lp; |
| 1487 | while (backref(i, lp)) |
| 1488 | lp += braelist[i] - braslist[i]; |
| 1489 | while (lp >= curlp) { |
| 1490 | if (advance(lp, ep)) |
| 1491 | return(1); |
| 1492 | lp -= braelist[i] - braslist[i]; |
| 1493 | } |
| 1494 | continue; |
| 1495 | |
| 1496 | case CDOT|STAR: |
| 1497 | curlp = lp; |
| 1498 | while (*lp++) |
| 1499 | ; |
| 1500 | goto star; |
| 1501 | |
| 1502 | case CCHR|STAR: |
| 1503 | curlp = lp; |
| 1504 | while (*lp++ == *ep) |
| 1505 | ; |
| 1506 | ep++; |
| 1507 | goto star; |
| 1508 | |
| 1509 | case CCL|STAR: |
| 1510 | case NCCL|STAR: |
| 1511 | curlp = lp; |
| 1512 | while (cclass(ep, *lp++, ep[-1]==(CCL|STAR))) |
| 1513 | ; |
| 1514 | ep += *ep; |
| 1515 | goto star; |
| 1516 | |
| 1517 | star: |
| 1518 | do { |
| 1519 | lp--; |
| 1520 | if (lp==locs) |
| 1521 | break; |
| 1522 | if (advance(lp, ep)) |
| 1523 | return(1); |
| 1524 | } while (lp > curlp); |
| 1525 | return(0); |
| 1526 | |
| 1527 | default: |
| 1528 | error(Q); |
| 1529 | } |
| 1530 | } |
| 1531 | |
| 1532 | backref(i, lp) |
| 1533 | register i; |
| 1534 | register char *lp; |
| 1535 | { |
| 1536 | register char *bp; |
| 1537 | |
| 1538 | bp = braslist[i]; |
| 1539 | while (*bp++ == *lp++) |
| 1540 | if (bp >= braelist[i]) |
| 1541 | return(1); |
| 1542 | return(0); |
| 1543 | } |
| 1544 | |
| 1545 | cclass(set, c, af) |
| 1546 | register char *set, c; |
| 1547 | { |
| 1548 | register n; |
| 1549 | |
| 1550 | if (c==0) |
| 1551 | return(0); |
| 1552 | n = *set++; |
| 1553 | while (--n) |
| 1554 | if (*set++ == c) |
| 1555 | return(af); |
| 1556 | return(!af); |
| 1557 | } |
| 1558 | |
| 1559 | putd() |
| 1560 | { |
| 1561 | register r; |
| 1562 | |
| 1563 | r = count%10; |
| 1564 | count /= 10; |
| 1565 | if (count) |
| 1566 | putd(); |
| 1567 | putchr(r + '0'); |
| 1568 | } |
| 1569 | |
| 1570 | puts(sp) |
| 1571 | register char *sp; |
| 1572 | { |
| 1573 | col = 0; |
| 1574 | while (*sp) |
| 1575 | putchr(*sp++); |
| 1576 | putchr('\n'); |
| 1577 | } |
| 1578 | |
| 1579 | char line[70]; |
| 1580 | char *linp = line; |
| 1581 | |
| 1582 | putchr(ac) |
| 1583 | { |
| 1584 | register char *lp; |
| 1585 | register c; |
| 1586 | |
| 1587 | lp = linp; |
| 1588 | c = ac; |
| 1589 | if (listf) { |
| 1590 | col++; |
| 1591 | if (col >= 72) { |
| 1592 | col = 0; |
| 1593 | *lp++ = '\\'; |
| 1594 | *lp++ = '\n'; |
| 1595 | } |
| 1596 | if (c=='\t') { |
| 1597 | c = '>'; |
| 1598 | goto esc; |
| 1599 | } |
| 1600 | if (c=='\b') { |
| 1601 | c = '<'; |
| 1602 | esc: |
| 1603 | *lp++ = '-'; |
| 1604 | *lp++ = '\b'; |
| 1605 | *lp++ = c; |
| 1606 | goto out; |
| 1607 | } |
| 1608 | if (c<' ' && c!= '\n') { |
| 1609 | *lp++ = '\\'; |
| 1610 | *lp++ = (c>>3)+'0'; |
| 1611 | *lp++ = (c&07)+'0'; |
| 1612 | col += 2; |
| 1613 | goto out; |
| 1614 | } |
| 1615 | } |
| 1616 | *lp++ = c; |
| 1617 | out: |
| 1618 | if(c == '\n' || lp >= &line[64]) { |
| 1619 | linp = line; |
| 1620 | write(1, line, lp-line); |
| 1621 | return; |
| 1622 | } |
| 1623 | linp = lp; |
| 1624 | } |
| 1625 | crblock(permp, buf, nchar, startn) |
| 1626 | char *permp; |
| 1627 | char *buf; |
| 1628 | long startn; |
| 1629 | { |
| 1630 | register char *p1; |
| 1631 | int n1; |
| 1632 | int n2; |
| 1633 | register char *t1, *t2, *t3; |
| 1634 | |
| 1635 | t1 = permp; |
| 1636 | t2 = &permp[256]; |
| 1637 | t3 = &permp[512]; |
| 1638 | |
| 1639 | n1 = startn&0377; |
| 1640 | n2 = (startn>>8)&0377; |
| 1641 | p1 = buf; |
| 1642 | while(nchar--) { |
| 1643 | *p1 = t2[(t3[(t1[(*p1+n1)&0377]+n2)&0377]-n2)&0377]-n1; |
| 1644 | n1++; |
| 1645 | if(n1==256){ |
| 1646 | n1 = 0; |
| 1647 | n2++; |
| 1648 | if(n2==256) n2 = 0; |
| 1649 | } |
| 1650 | p1++; |
| 1651 | } |
| 1652 | } |
| 1653 | |
| 1654 | getkey() |
| 1655 | { |
| 1656 | struct sgttyb b; |
| 1657 | int save; |
| 1658 | int (*sig)(); |
| 1659 | register char *p; |
| 1660 | register c; |
| 1661 | |
| 1662 | sig = signal(SIGINT, SIG_IGN); |
| 1663 | if (gtty(0, &b) == -1) |
| 1664 | error("Input not tty"); |
| 1665 | save = b.sg_flags; |
| 1666 | b.sg_flags &= ~ECHO; |
| 1667 | stty(0, &b); |
| 1668 | puts("Key:"); |
| 1669 | p = key; |
| 1670 | while(((c=getchr()) != EOF) && (c!='\n')) { |
| 1671 | if(p < &key[KSIZE]) |
| 1672 | *p++ = c; |
| 1673 | } |
| 1674 | *p = 0; |
| 1675 | b.sg_flags = save; |
| 1676 | stty(0, &b); |
| 1677 | signal(SIGINT, sig); |
| 1678 | return(key[0] != 0); |
| 1679 | } |
| 1680 | |
| 1681 | /* |
| 1682 | * Besides initializing the encryption machine, this routine |
| 1683 | * returns 0 if the key is null, and 1 if it is non-null. |
| 1684 | */ |
| 1685 | crinit(keyp, permp) |
| 1686 | char *keyp, *permp; |
| 1687 | { |
| 1688 | register char *t1, *t2, *t3; |
| 1689 | register i; |
| 1690 | int ic, k, temp, pf[2]; |
| 1691 | unsigned random; |
| 1692 | char buf[13]; |
| 1693 | long seed; |
| 1694 | |
| 1695 | t1 = permp; |
| 1696 | t2 = &permp[256]; |
| 1697 | t3 = &permp[512]; |
| 1698 | if(*keyp == 0) |
| 1699 | return(0); |
| 1700 | strncpy(buf, keyp, 8); |
| 1701 | while (*keyp) |
| 1702 | *keyp++ = '\0'; |
| 1703 | buf[8] = buf[0]; |
| 1704 | buf[9] = buf[1]; |
| 1705 | if (pipe(pf)<0) |
| 1706 | pf[0] = pf[1] = -1; |
| 1707 | if (fork()==0) { |
| 1708 | close(0); |
| 1709 | close(1); |
| 1710 | dup(pf[0]); |
| 1711 | dup(pf[1]); |
| 1712 | execl("/usr/lib/makekey", "-", 0); |
| 1713 | execl("/lib/makekey", "-", 0); |
| 1714 | exit(1); |
| 1715 | } |
| 1716 | write(pf[1], buf, 10); |
| 1717 | if (wait((int *)NULL)==-1 || read(pf[0], buf, 13)!=13) |
| 1718 | error("crypt: cannot generate key"); |
| 1719 | close(pf[0]); |
| 1720 | close(pf[1]); |
| 1721 | seed = 123; |
| 1722 | for (i=0; i<13; i++) |
| 1723 | seed = seed*buf[i] + i; |
| 1724 | for(i=0;i<256;i++){ |
| 1725 | t1[i] = i; |
| 1726 | t3[i] = 0; |
| 1727 | } |
| 1728 | for(i=0; i<256; i++) { |
| 1729 | seed = 5*seed + buf[i%13]; |
| 1730 | random = seed % 65521; |
| 1731 | k = 256-1 - i; |
| 1732 | ic = (random&0377) % (k+1); |
| 1733 | random >>= 8; |
| 1734 | temp = t1[k]; |
| 1735 | t1[k] = t1[ic]; |
| 1736 | t1[ic] = temp; |
| 1737 | if(t3[k]!=0) continue; |
| 1738 | ic = (random&0377) % k; |
| 1739 | while(t3[ic]!=0) ic = (ic+1) % k; |
| 1740 | t3[k] = ic; |
| 1741 | t3[ic] = k; |
| 1742 | } |
| 1743 | for(i=0; i<256; i++) |
| 1744 | t2[t1[i]&0377] = i; |
| 1745 | return(1); |
| 1746 | } |
| 1747 | |
| 1748 | makekey(a, b) |
| 1749 | char *a, *b; |
| 1750 | { |
| 1751 | register int i; |
| 1752 | long t; |
| 1753 | char temp[KSIZE + 1]; |
| 1754 | |
| 1755 | for(i = 0; i < KSIZE; i++) |
| 1756 | temp[i] = *a++; |
| 1757 | time(&t); |
| 1758 | t += getpid(); |
| 1759 | for(i = 0; i < 4; i++) |
| 1760 | temp[i] ^= (t>>(8*i))&0377; |
| 1761 | crinit(temp, b); |
| 1762 | } |