| 1 | /* Copyright (c) 1979 Regents of the University of California */ |
| 2 | #include "ex.h" |
| 3 | #include "ex_argv.h" |
| 4 | #include "ex_temp.h" |
| 5 | #include "ex_tty.h" |
| 6 | |
| 7 | bool pflag, nflag; |
| 8 | int poffset; |
| 9 | |
| 10 | #define nochng() lchng = chng |
| 11 | |
| 12 | /* |
| 13 | * Main loop for command mode command decoding. |
| 14 | * A few commands are executed here, but main function |
| 15 | * is to strip command addresses, do a little address oriented |
| 16 | * processing and call command routines to do the real work. |
| 17 | */ |
| 18 | commands(noprompt, exitoneof) |
| 19 | bool noprompt, exitoneof; |
| 20 | { |
| 21 | register line *addr; |
| 22 | register int c; |
| 23 | register int lchng; |
| 24 | int given; |
| 25 | int seensemi; |
| 26 | int cnt; |
| 27 | bool hadpr; |
| 28 | |
| 29 | resetflav(); |
| 30 | nochng(); |
| 31 | for (;;) { |
| 32 | /* |
| 33 | * If dot at last command |
| 34 | * ended up at zero, advance to one if there is a such. |
| 35 | */ |
| 36 | if (dot <= zero) { |
| 37 | dot = zero; |
| 38 | if (dol > zero) |
| 39 | dot = one; |
| 40 | } |
| 41 | shudclob = 0; |
| 42 | |
| 43 | /* |
| 44 | * If autoprint or trailing print flags, |
| 45 | * print the line at the specified offset |
| 46 | * before the next command. |
| 47 | */ |
| 48 | if (pflag || |
| 49 | lchng != chng && value(AUTOPRINT) && !inglobal && !inopen && endline) { |
| 50 | pflag = 0; |
| 51 | nochng(); |
| 52 | if (dol != zero) { |
| 53 | addr1 = addr2 = dot + poffset; |
| 54 | if (addr1 < one || addr1 > dol) |
| 55 | error("Offset out-of-bounds|Offset after command too large"); |
| 56 | setdot1(); |
| 57 | goto print; |
| 58 | } |
| 59 | } |
| 60 | nochng(); |
| 61 | |
| 62 | /* |
| 63 | * Print prompt if appropriate. |
| 64 | * If not in global flush output first to prevent |
| 65 | * going into pfast mode unreasonably. |
| 66 | */ |
| 67 | if (inglobal == 0) { |
| 68 | flush(); |
| 69 | if (!hush && value(PROMPT) && !globp && !noprompt && endline) { |
| 70 | putchar(':'); |
| 71 | hadpr = 1; |
| 72 | } |
| 73 | TSYNC(); |
| 74 | } |
| 75 | |
| 76 | /* |
| 77 | * Gobble up the address. |
| 78 | * Degenerate addresses yield ".". |
| 79 | */ |
| 80 | addr2 = 0; |
| 81 | given = seensemi = 0; |
| 82 | do { |
| 83 | addr1 = addr2; |
| 84 | addr = address(0); |
| 85 | c = getcd(); |
| 86 | if (addr == 0) |
| 87 | if (c == ',') |
| 88 | addr = dot; |
| 89 | else if (addr1 != 0) { |
| 90 | addr2 = dot; |
| 91 | break; |
| 92 | } else |
| 93 | break; |
| 94 | addr2 = addr; |
| 95 | given++; |
| 96 | if (c == ';') { |
| 97 | c = ','; |
| 98 | dot = addr; |
| 99 | seensemi = 1; |
| 100 | } |
| 101 | } while (c == ','); |
| 102 | if (c == '%') { |
| 103 | /* %: same as 1,$ */ |
| 104 | addr1 = one; |
| 105 | addr2 = dol; |
| 106 | given = 2; |
| 107 | c = getchar(); |
| 108 | } |
| 109 | if (addr1 == 0) |
| 110 | addr1 = addr2; |
| 111 | if (c == ':') |
| 112 | c = getchar(); |
| 113 | |
| 114 | /* |
| 115 | * Set command name for special character commands. |
| 116 | */ |
| 117 | tailspec(c); |
| 118 | |
| 119 | /* |
| 120 | * If called via : escape from open or visual, limit |
| 121 | * the set of available commands here to save work below. |
| 122 | */ |
| 123 | if (inopen) { |
| 124 | if (c=='\n' || c=='\r' || c==CTRL(d) || c==EOF) { |
| 125 | if (addr2) |
| 126 | dot = addr2; |
| 127 | if (c == EOF) |
| 128 | return; |
| 129 | continue; |
| 130 | } |
| 131 | if (any(c, "o")) |
| 132 | notinvis: |
| 133 | tailprim(Command, 1, 1); |
| 134 | } |
| 135 | choice: |
| 136 | switch (c) { |
| 137 | |
| 138 | case 'a': |
| 139 | |
| 140 | switch(peekchar()) { |
| 141 | case 'b': |
| 142 | /* abbreviate */ |
| 143 | tail("abbreviate"); |
| 144 | setnoaddr(); |
| 145 | mapcmd(0, 1); |
| 146 | anyabbrs = 1; |
| 147 | continue; |
| 148 | case 'r': |
| 149 | /* args */ |
| 150 | tail("args"); |
| 151 | setnoaddr(); |
| 152 | eol(); |
| 153 | pargs(); |
| 154 | continue; |
| 155 | } |
| 156 | |
| 157 | /* append */ |
| 158 | if (inopen) |
| 159 | goto notinvis; |
| 160 | tail("append"); |
| 161 | setdot(); |
| 162 | aiflag = exclam(); |
| 163 | newline(); |
| 164 | vmacchng(0); |
| 165 | deletenone(); |
| 166 | setin(addr2); |
| 167 | inappend = 1; |
| 168 | ignore(append(gettty, addr2)); |
| 169 | inappend = 0; |
| 170 | nochng(); |
| 171 | continue; |
| 172 | |
| 173 | case 'c': |
| 174 | switch (peekchar()) { |
| 175 | |
| 176 | /* copy */ |
| 177 | case 'o': |
| 178 | tail("copy"); |
| 179 | vmacchng(0); |
| 180 | move(); |
| 181 | continue; |
| 182 | |
| 183 | #ifdef CHDIR |
| 184 | /* cd */ |
| 185 | case 'd': |
| 186 | tail("cd"); |
| 187 | goto changdir; |
| 188 | |
| 189 | /* chdir */ |
| 190 | case 'h': |
| 191 | ignchar(); |
| 192 | if (peekchar() == 'd') { |
| 193 | register char *p; |
| 194 | tail2of("chdir"); |
| 195 | changdir: |
| 196 | if (savedfile[0] == '/' || !value(WARN)) |
| 197 | ignore(exclam()); |
| 198 | else |
| 199 | ignore(quickly()); |
| 200 | if (skipend()) { |
| 201 | p = getenv("HOME"); |
| 202 | if (p == NULL) |
| 203 | error("Home directory unknown"); |
| 204 | } else |
| 205 | getone(), p = file; |
| 206 | eol(); |
| 207 | if (chdir(p) < 0) |
| 208 | filioerr(p); |
| 209 | if (savedfile[0] != '/') |
| 210 | edited = 0; |
| 211 | continue; |
| 212 | } |
| 213 | if (inopen) |
| 214 | tailprim("change", 2, 1); |
| 215 | tail2of("change"); |
| 216 | break; |
| 217 | |
| 218 | #endif |
| 219 | default: |
| 220 | if (inopen) |
| 221 | goto notinvis; |
| 222 | tail("change"); |
| 223 | break; |
| 224 | } |
| 225 | /* change */ |
| 226 | aiflag = exclam(); |
| 227 | setCNL(); |
| 228 | vmacchng(0); |
| 229 | setin(addr1); |
| 230 | delete(0); |
| 231 | inappend = 1; |
| 232 | ignore(append(gettty, addr1 - 1)); |
| 233 | inappend = 0; |
| 234 | nochng(); |
| 235 | continue; |
| 236 | |
| 237 | /* delete */ |
| 238 | case 'd': |
| 239 | /* |
| 240 | * Caution: dp and dl have special meaning already. |
| 241 | */ |
| 242 | tail("delete"); |
| 243 | c = cmdreg(); |
| 244 | setCNL(); |
| 245 | vmacchng(0); |
| 246 | if (c) |
| 247 | YANKreg(c); |
| 248 | delete(0); |
| 249 | appendnone(); |
| 250 | continue; |
| 251 | |
| 252 | /* edit */ |
| 253 | /* ex */ |
| 254 | case 'e': |
| 255 | tail(peekchar() == 'x' ? "ex" : "edit"); |
| 256 | editcmd: |
| 257 | if (!exclam() && chng) |
| 258 | c = 'E'; |
| 259 | filename(c); |
| 260 | if (c == 'E') { |
| 261 | ungetchar(lastchar()); |
| 262 | ignore(quickly()); |
| 263 | } |
| 264 | setnoaddr(); |
| 265 | doecmd: |
| 266 | init(); |
| 267 | addr2 = zero; |
| 268 | laste++; |
| 269 | sync(); |
| 270 | rop(c); |
| 271 | nochng(); |
| 272 | continue; |
| 273 | |
| 274 | /* file */ |
| 275 | case 'f': |
| 276 | tail("file"); |
| 277 | setnoaddr(); |
| 278 | filename(c); |
| 279 | noonl(); |
| 280 | /* |
| 281 | synctmp(); |
| 282 | */ |
| 283 | continue; |
| 284 | |
| 285 | /* global */ |
| 286 | case 'g': |
| 287 | tail("global"); |
| 288 | global(!exclam()); |
| 289 | nochng(); |
| 290 | continue; |
| 291 | |
| 292 | /* insert */ |
| 293 | case 'i': |
| 294 | if (inopen) |
| 295 | goto notinvis; |
| 296 | tail("insert"); |
| 297 | setdot(); |
| 298 | nonzero(); |
| 299 | aiflag = exclam(); |
| 300 | newline(); |
| 301 | vmacchng(0); |
| 302 | deletenone(); |
| 303 | setin(addr2); |
| 304 | inappend = 1; |
| 305 | ignore(append(gettty, addr2 - 1)); |
| 306 | inappend = 0; |
| 307 | if (dot == zero && dol > zero) |
| 308 | dot = one; |
| 309 | nochng(); |
| 310 | continue; |
| 311 | |
| 312 | /* join */ |
| 313 | case 'j': |
| 314 | tail("join"); |
| 315 | c = exclam(); |
| 316 | setcount(); |
| 317 | nonzero(); |
| 318 | newline(); |
| 319 | vmacchng(0); |
| 320 | if (given < 2 && addr2 != dol) |
| 321 | addr2++; |
| 322 | join(c); |
| 323 | continue; |
| 324 | |
| 325 | /* k */ |
| 326 | case 'k': |
| 327 | casek: |
| 328 | pastwh(); |
| 329 | c = getchar(); |
| 330 | if (endcmd(c)) |
| 331 | serror("Mark what?|%s requires following letter", Command); |
| 332 | newline(); |
| 333 | if (!islower(c)) |
| 334 | error("Bad mark|Mark must specify a letter"); |
| 335 | setdot(); |
| 336 | nonzero(); |
| 337 | names[c - 'a'] = *addr2 &~ 01; |
| 338 | anymarks = 1; |
| 339 | continue; |
| 340 | |
| 341 | /* list */ |
| 342 | case 'l': |
| 343 | tail("list"); |
| 344 | setCNL(); |
| 345 | ignorf(setlist(1)); |
| 346 | pflag = 0; |
| 347 | goto print; |
| 348 | |
| 349 | case 'm': |
| 350 | if (peekchar() == 'a') { |
| 351 | ignchar(); |
| 352 | if (peekchar() == 'p') { |
| 353 | /* map */ |
| 354 | tail2of("map"); |
| 355 | setnoaddr(); |
| 356 | mapcmd(0, 0); |
| 357 | continue; |
| 358 | } |
| 359 | /* mark */ |
| 360 | tail2of("mark"); |
| 361 | goto casek; |
| 362 | } |
| 363 | /* move */ |
| 364 | tail("move"); |
| 365 | vmacchng(0); |
| 366 | move(); |
| 367 | continue; |
| 368 | |
| 369 | case 'n': |
| 370 | if (peekchar() == 'u') { |
| 371 | tail("number"); |
| 372 | goto numberit; |
| 373 | } |
| 374 | /* next */ |
| 375 | tail("next"); |
| 376 | setnoaddr(); |
| 377 | ckaw(); |
| 378 | ignore(quickly()); |
| 379 | if (getargs()) |
| 380 | makargs(); |
| 381 | next(); |
| 382 | c = 'e'; |
| 383 | filename(c); |
| 384 | goto doecmd; |
| 385 | |
| 386 | /* open */ |
| 387 | case 'o': |
| 388 | tail("open"); |
| 389 | oop(); |
| 390 | pflag = 0; |
| 391 | nochng(); |
| 392 | continue; |
| 393 | |
| 394 | case 'p': |
| 395 | case 'P': |
| 396 | switch (peekchar()) { |
| 397 | |
| 398 | /* put */ |
| 399 | case 'u': |
| 400 | tail("put"); |
| 401 | setdot(); |
| 402 | c = cmdreg(); |
| 403 | eol(); |
| 404 | vmacchng(0); |
| 405 | if (c) |
| 406 | putreg(c); |
| 407 | else |
| 408 | put(); |
| 409 | continue; |
| 410 | |
| 411 | case 'r': |
| 412 | ignchar(); |
| 413 | if (peekchar() == 'e') { |
| 414 | /* preserve */ |
| 415 | tail2of("preserve"); |
| 416 | eol(); |
| 417 | if (preserve() == 0) |
| 418 | error("Preserve failed!"); |
| 419 | else |
| 420 | error("File preserved."); |
| 421 | } |
| 422 | tail2of("print"); |
| 423 | break; |
| 424 | |
| 425 | default: |
| 426 | tail("print"); |
| 427 | break; |
| 428 | } |
| 429 | /* print */ |
| 430 | setCNL(); |
| 431 | pflag = 0; |
| 432 | print: |
| 433 | nonzero(); |
| 434 | if (CL && span() > LINES) { |
| 435 | flush1(); |
| 436 | vclear(); |
| 437 | } |
| 438 | plines(addr1, addr2, 1); |
| 439 | continue; |
| 440 | |
| 441 | /* quit */ |
| 442 | case 'q': |
| 443 | tail("quit"); |
| 444 | setnoaddr(); |
| 445 | c = quickly(); |
| 446 | eol(); |
| 447 | if (!c) |
| 448 | quit: |
| 449 | nomore(); |
| 450 | if (inopen) { |
| 451 | vgoto(WECHO, 0); |
| 452 | if (!ateopr()) |
| 453 | vnfl(); |
| 454 | else { |
| 455 | tostop(); |
| 456 | /* replaced by tostop |
| 457 | putpad(VE); |
| 458 | putpad(KE); |
| 459 | */ |
| 460 | } |
| 461 | flush(); |
| 462 | setty(normf); |
| 463 | } |
| 464 | cleanup(1); |
| 465 | exit(0); |
| 466 | |
| 467 | case 'r': |
| 468 | if (peekchar() == 'e') { |
| 469 | ignchar(); |
| 470 | switch (peekchar()) { |
| 471 | |
| 472 | /* rewind */ |
| 473 | case 'w': |
| 474 | tail2of("rewind"); |
| 475 | setnoaddr(); |
| 476 | eol(); |
| 477 | ckaw(); |
| 478 | ignore(quickly()); |
| 479 | erewind(); |
| 480 | next(); |
| 481 | c = 'e'; |
| 482 | ungetchar(lastchar()); |
| 483 | filename(c); |
| 484 | goto doecmd; |
| 485 | |
| 486 | /* recover */ |
| 487 | case 'c': |
| 488 | tail2of("recover"); |
| 489 | setnoaddr(); |
| 490 | c = 'e'; |
| 491 | if (!exclam() && chng) |
| 492 | c = 'E'; |
| 493 | filename(c); |
| 494 | if (c == 'E') { |
| 495 | ungetchar(lastchar()); |
| 496 | ignore(quickly()); |
| 497 | } |
| 498 | init(); |
| 499 | addr2 = zero; |
| 500 | laste++; |
| 501 | sync(); |
| 502 | recover(); |
| 503 | rop2(); |
| 504 | revocer(); |
| 505 | if (status == 0) |
| 506 | rop3(c); |
| 507 | if (dol != zero) |
| 508 | change(); |
| 509 | nochng(); |
| 510 | continue; |
| 511 | } |
| 512 | tail2of("read"); |
| 513 | } else |
| 514 | tail("read"); |
| 515 | /* read */ |
| 516 | if (savedfile[0] == 0 && dol == zero) |
| 517 | c = 'e'; |
| 518 | pastwh(); |
| 519 | vmacchng(0); |
| 520 | if (peekchar() == '!') { |
| 521 | setdot(); |
| 522 | ignchar(); |
| 523 | unix0(0); |
| 524 | filter(0); |
| 525 | continue; |
| 526 | } |
| 527 | filename(c); |
| 528 | rop(c); |
| 529 | nochng(); |
| 530 | if (inopen && endline && addr1 > zero && addr1 < dol) |
| 531 | dot = addr1 + 1; |
| 532 | continue; |
| 533 | |
| 534 | case 's': |
| 535 | switch (peekchar()) { |
| 536 | /* |
| 537 | * Caution: 2nd char cannot be c, g, or r |
| 538 | * because these have meaning to substitute. |
| 539 | */ |
| 540 | |
| 541 | /* set */ |
| 542 | case 'e': |
| 543 | tail("set"); |
| 544 | setnoaddr(); |
| 545 | set(); |
| 546 | continue; |
| 547 | |
| 548 | /* shell */ |
| 549 | case 'h': |
| 550 | tail("shell"); |
| 551 | setNAEOL(); |
| 552 | vnfl(); |
| 553 | putpad(TE); |
| 554 | flush(); |
| 555 | unixwt(1, unixex("-i", (char *) 0, 0, 0)); |
| 556 | vcontin(0); |
| 557 | continue; |
| 558 | |
| 559 | /* source */ |
| 560 | case 'o': |
| 561 | if (inopen) |
| 562 | goto notinvis; |
| 563 | tail("source"); |
| 564 | setnoaddr(); |
| 565 | getone(); |
| 566 | eol(); |
| 567 | source(file, 0); |
| 568 | continue; |
| 569 | #ifdef TIOCLGET |
| 570 | /* stop */ |
| 571 | case 't': |
| 572 | tail("stop"); |
| 573 | if (!ldisc) |
| 574 | error("Old tty driver|Not using new tty driver/shell"); |
| 575 | c = exclam(); |
| 576 | eol(); |
| 577 | if (!c) |
| 578 | ckaw(); |
| 579 | eol(); |
| 580 | onsusp(); |
| 581 | continue; |
| 582 | #endif |
| 583 | |
| 584 | } |
| 585 | /* fall into ... */ |
| 586 | |
| 587 | /* & */ |
| 588 | /* ~ */ |
| 589 | /* substitute */ |
| 590 | case '&': |
| 591 | case '~': |
| 592 | Command = "substitute"; |
| 593 | if (c == 's') |
| 594 | tail(Command); |
| 595 | vmacchng(0); |
| 596 | if (!substitute(c)) |
| 597 | pflag = 0; |
| 598 | continue; |
| 599 | |
| 600 | /* t */ |
| 601 | case 't': |
| 602 | if (peekchar() == 'a') { |
| 603 | tail("tag"); |
| 604 | tagfind(exclam()); |
| 605 | if (!inopen) |
| 606 | lchng = chng - 1; |
| 607 | else |
| 608 | nochng(); |
| 609 | continue; |
| 610 | } |
| 611 | tail("t"); |
| 612 | vmacchng(0); |
| 613 | move(); |
| 614 | continue; |
| 615 | |
| 616 | case 'u': |
| 617 | if (peekchar() == 'n') { |
| 618 | ignchar(); |
| 619 | switch(peekchar()) { |
| 620 | /* unmap */ |
| 621 | case 'm': |
| 622 | tail2of("unmap"); |
| 623 | setnoaddr(); |
| 624 | mapcmd(1, 0); |
| 625 | continue; |
| 626 | /* unabbreviate */ |
| 627 | case 'a': |
| 628 | tail2of("unabbreviate"); |
| 629 | setnoaddr(); |
| 630 | mapcmd(1, 1); |
| 631 | anyabbrs = 1; |
| 632 | continue; |
| 633 | } |
| 634 | /* undo */ |
| 635 | tail2of("undo"); |
| 636 | } else |
| 637 | tail("undo"); |
| 638 | setnoaddr(); |
| 639 | markDOT(); |
| 640 | c = exclam(); |
| 641 | newline(); |
| 642 | undo(c); |
| 643 | continue; |
| 644 | |
| 645 | case 'v': |
| 646 | switch (peekchar()) { |
| 647 | |
| 648 | case 'e': |
| 649 | /* version */ |
| 650 | tail("version"); |
| 651 | setNAEOL(); |
| 652 | /* should use SCCS subst here */ |
| 653 | printf("Version 3.4, June 24, 1980"); |
| 654 | noonl(); |
| 655 | continue; |
| 656 | |
| 657 | /* visual */ |
| 658 | case 'i': |
| 659 | tail("visual"); |
| 660 | if (inopen) { |
| 661 | c = 'e'; |
| 662 | goto editcmd; |
| 663 | } |
| 664 | vop(); |
| 665 | pflag = 0; |
| 666 | nochng(); |
| 667 | continue; |
| 668 | } |
| 669 | /* v */ |
| 670 | tail("v"); |
| 671 | global(0); |
| 672 | nochng(); |
| 673 | continue; |
| 674 | |
| 675 | /* write */ |
| 676 | case 'w': |
| 677 | c = peekchar(); |
| 678 | tail(c == 'q' ? "wq" : "write"); |
| 679 | wq: |
| 680 | if (skipwh() && peekchar() == '!') { |
| 681 | pofix(); |
| 682 | ignchar(); |
| 683 | setall(); |
| 684 | unix0(0); |
| 685 | filter(1); |
| 686 | } else { |
| 687 | setall(); |
| 688 | wop(1); |
| 689 | nochng(); |
| 690 | } |
| 691 | if (c == 'q') |
| 692 | goto quit; |
| 693 | continue; |
| 694 | |
| 695 | /* xit */ |
| 696 | case 'x': |
| 697 | tail("xit"); |
| 698 | if (!chng) |
| 699 | goto quit; |
| 700 | c = 'q'; |
| 701 | goto wq; |
| 702 | |
| 703 | /* yank */ |
| 704 | case 'y': |
| 705 | tail("yank"); |
| 706 | c = cmdreg(); |
| 707 | setcount(); |
| 708 | eol(); |
| 709 | vmacchng(0); |
| 710 | if (c) |
| 711 | YANKreg(c); |
| 712 | else |
| 713 | yank(); |
| 714 | continue; |
| 715 | |
| 716 | /* z */ |
| 717 | case 'z': |
| 718 | zop(0); |
| 719 | pflag = 0; |
| 720 | continue; |
| 721 | |
| 722 | /* * */ |
| 723 | /* @ */ |
| 724 | case '*': |
| 725 | case '@': |
| 726 | c = getchar(); |
| 727 | if (c=='\n' || c=='\r') |
| 728 | ungetchar(c); |
| 729 | if (any(c, "@*\n\r")) |
| 730 | c = lastmac; |
| 731 | if (isupper(c)) |
| 732 | c = tolower(c); |
| 733 | if (!islower(c)) |
| 734 | error("Bad register"); |
| 735 | newline(); |
| 736 | setdot(); |
| 737 | cmdmac(c); |
| 738 | continue; |
| 739 | |
| 740 | /* | */ |
| 741 | case '|': |
| 742 | endline = 0; |
| 743 | goto caseline; |
| 744 | |
| 745 | /* \n */ |
| 746 | case '\n': |
| 747 | endline = 1; |
| 748 | caseline: |
| 749 | notempty(); |
| 750 | if (addr2 == 0) { |
| 751 | if (UP != NOSTR && c == '\n' && !inglobal) |
| 752 | c = CTRL(k); |
| 753 | if (inglobal) |
| 754 | addr1 = addr2 = dot; |
| 755 | else { |
| 756 | if (dot == dol) |
| 757 | error("At EOF|At end-of-file"); |
| 758 | addr1 = addr2 = dot + 1; |
| 759 | } |
| 760 | } |
| 761 | setdot(); |
| 762 | nonzero(); |
| 763 | if (seensemi) |
| 764 | addr1 = addr2; |
| 765 | getline(*addr1); |
| 766 | if (c == CTRL(k)) { |
| 767 | flush1(); |
| 768 | destline--; |
| 769 | if (hadpr) |
| 770 | shudclob = 1; |
| 771 | } |
| 772 | plines(addr1, addr2, 1); |
| 773 | continue; |
| 774 | |
| 775 | /* " */ |
| 776 | case '"': |
| 777 | comment(); |
| 778 | continue; |
| 779 | |
| 780 | /* # */ |
| 781 | case '#': |
| 782 | numberit: |
| 783 | setCNL(); |
| 784 | ignorf(setnumb(1)); |
| 785 | pflag = 0; |
| 786 | goto print; |
| 787 | |
| 788 | /* = */ |
| 789 | case '=': |
| 790 | newline(); |
| 791 | setall(); |
| 792 | if (inglobal == 2) |
| 793 | pofix(); |
| 794 | printf("%d", lineno(addr2)); |
| 795 | noonl(); |
| 796 | continue; |
| 797 | |
| 798 | /* ! */ |
| 799 | case '!': |
| 800 | if (addr2 != 0) { |
| 801 | vmacchng(0); |
| 802 | unix0(0); |
| 803 | setdot(); |
| 804 | filter(2); |
| 805 | } else { |
| 806 | unix0(1); |
| 807 | pofix(); |
| 808 | putpad(TE); |
| 809 | flush(); |
| 810 | unixwt(1, unixex("-c", uxb, 0, 0)); |
| 811 | vclrech(1); /* vcontin(0); */ |
| 812 | nochng(); |
| 813 | } |
| 814 | continue; |
| 815 | |
| 816 | /* < */ |
| 817 | /* > */ |
| 818 | case '<': |
| 819 | case '>': |
| 820 | for (cnt = 1; peekchar() == c; cnt++) |
| 821 | ignchar(); |
| 822 | setCNL(); |
| 823 | vmacchng(0); |
| 824 | shift(c, cnt); |
| 825 | continue; |
| 826 | |
| 827 | /* ^D */ |
| 828 | /* EOF */ |
| 829 | case CTRL(d): |
| 830 | case EOF: |
| 831 | if (exitoneof) { |
| 832 | if (addr2 != 0) |
| 833 | dot = addr2; |
| 834 | return; |
| 835 | } |
| 836 | if (!isatty(0)) { |
| 837 | if (intty) |
| 838 | /* |
| 839 | * Chtty sys call at UCB may cause a |
| 840 | * input which was a tty to suddenly be |
| 841 | * turned into /dev/null. |
| 842 | */ |
| 843 | onhup(); |
| 844 | return; |
| 845 | } |
| 846 | if (addr2 != 0) { |
| 847 | setlastchar('\n'); |
| 848 | putnl(); |
| 849 | } |
| 850 | if (dol == zero) { |
| 851 | if (addr2 == 0) |
| 852 | putnl(); |
| 853 | notempty(); |
| 854 | } |
| 855 | ungetchar(EOF); |
| 856 | zop(hadpr); |
| 857 | continue; |
| 858 | |
| 859 | default: |
| 860 | if (!isalpha(c)) |
| 861 | break; |
| 862 | ungetchar(c); |
| 863 | tailprim("", 0, 0); |
| 864 | } |
| 865 | error("What?|Unknown command character '%c'", c); |
| 866 | } |
| 867 | } |