| 1 | /* |
| 2 | * Copyright (c) 1980 Regents of the University of California. |
| 3 | * All rights reserved. The Berkeley software License Agreement |
| 4 | * specifies the terms and conditions for redistribution. |
| 5 | */ |
| 6 | |
| 7 | #ifndef lint |
| 8 | char copyright[] = |
| 9 | "@(#) Copyright (c) 1980 Regents of the University of California.\n\ |
| 10 | All rights reserved.\n"; |
| 11 | #endif not lint |
| 12 | |
| 13 | #ifndef lint |
| 14 | static char sccsid[] = "@(#)more.c 5.12 (Berkeley) %G%"; |
| 15 | #endif not lint |
| 16 | |
| 17 | /* |
| 18 | ** more.c - General purpose tty output filter and file perusal program |
| 19 | ** |
| 20 | ** by Eric Shienbrood, UC Berkeley |
| 21 | ** |
| 22 | ** modified by Geoff Peck, UCB to add underlining, single spacing |
| 23 | ** modified by John Foderaro, UCB to add -c and MORE environment variable |
| 24 | */ |
| 25 | |
| 26 | #include <stdio.h> |
| 27 | #include <sys/types.h> |
| 28 | #include <ctype.h> |
| 29 | #include <signal.h> |
| 30 | #include <errno.h> |
| 31 | #include <sgtty.h> |
| 32 | #include <setjmp.h> |
| 33 | #include <sys/stat.h> |
| 34 | #include <sys/file.h> |
| 35 | #include <sys/exec.h> |
| 36 | |
| 37 | #define HELPFILE "/usr/lib/more.help" |
| 38 | #define VI "/usr/ucb/vi" |
| 39 | |
| 40 | #define Fopen(s,m) (Currline = 0,file_pos=0,fopen(s,m)) |
| 41 | #define Ftell(f) file_pos |
| 42 | #define Fseek(f,off) (file_pos=off,fseek(f,off,0)) |
| 43 | #define Getc(f) (++file_pos, getc(f)) |
| 44 | #define Ungetc(c,f) (--file_pos, ungetc(c,f)) |
| 45 | |
| 46 | #define MBIT CBREAK |
| 47 | #define stty(fd,argp) ioctl(fd,TIOCSETN,argp) |
| 48 | |
| 49 | #define TBUFSIZ 1024 |
| 50 | #define LINSIZ 256 |
| 51 | #define ctrl(letter) ('letter' & 077) |
| 52 | #define RUBOUT '\177' |
| 53 | #define ESC '\033' |
| 54 | #define QUIT '\034' |
| 55 | |
| 56 | struct sgttyb otty, savetty; |
| 57 | long file_pos, file_size; |
| 58 | int fnum, no_intty, no_tty, slow_tty; |
| 59 | int dum_opt, dlines, onquit(), end_it(), chgwinsz(); |
| 60 | int onsusp(); |
| 61 | int nscroll = 11; /* Number of lines scrolled by 'd' */ |
| 62 | int fold_opt = 1; /* Fold long lines */ |
| 63 | int stop_opt = 1; /* Stop after form feeds */ |
| 64 | int ssp_opt = 0; /* Suppress white space */ |
| 65 | int ul_opt = 1; /* Underline as best we can */ |
| 66 | int promptlen; |
| 67 | int Currline; /* Line we are currently at */ |
| 68 | int startup = 1; |
| 69 | int firstf = 1; |
| 70 | int notell = 1; |
| 71 | int docrterase = 0; |
| 72 | int docrtkill = 0; |
| 73 | int bad_so; /* True if overwriting does not turn off standout */ |
| 74 | int inwait, Pause, errors; |
| 75 | int within; /* true if we are within a file, |
| 76 | false if we are between files */ |
| 77 | int hard, dumb, noscroll, hardtabs, clreol, eatnl; |
| 78 | int catch_susp; /* We should catch the SIGTSTP signal */ |
| 79 | char **fnames; /* The list of file names */ |
| 80 | int nfiles; /* Number of files left to process */ |
| 81 | char *shell; /* The name of the shell to use */ |
| 82 | int shellp; /* A previous shell command exists */ |
| 83 | char ch; |
| 84 | jmp_buf restore; |
| 85 | char Line[LINSIZ]; /* Line buffer */ |
| 86 | int Lpp = 24; /* lines per page */ |
| 87 | char *Clear; /* clear screen */ |
| 88 | char *eraseln; /* erase line */ |
| 89 | char *Senter, *Sexit;/* enter and exit standout mode */ |
| 90 | char *ULenter, *ULexit; /* enter and exit underline mode */ |
| 91 | char *chUL; /* underline character */ |
| 92 | char *chBS; /* backspace character */ |
| 93 | char *Home; /* go to home */ |
| 94 | char *cursorm; /* cursor movement */ |
| 95 | char cursorhome[40]; /* contains cursor movement to home */ |
| 96 | char *EodClr; /* clear rest of screen */ |
| 97 | char *tgetstr(); |
| 98 | int Mcol = 80; /* number of columns */ |
| 99 | int Wrap = 1; /* set if automargins */ |
| 100 | int soglitch; /* terminal has standout mode glitch */ |
| 101 | int ulglitch; /* terminal has underline mode glitch */ |
| 102 | int pstate = 0; /* current UL state */ |
| 103 | long fseek(); |
| 104 | char *getenv(); |
| 105 | struct { |
| 106 | long chrctr, line; |
| 107 | } context, screen_start; |
| 108 | extern char PC; /* pad character */ |
| 109 | extern short ospeed; |
| 110 | |
| 111 | |
| 112 | main(argc, argv) |
| 113 | int argc; |
| 114 | char *argv[]; |
| 115 | { |
| 116 | register FILE *f; |
| 117 | register char *s; |
| 118 | register char *p; |
| 119 | register char ch; |
| 120 | register int left; |
| 121 | int prnames = 0; |
| 122 | int initopt = 0; |
| 123 | int srchopt = 0; |
| 124 | int clearit = 0; |
| 125 | int initline; |
| 126 | char initbuf[80]; |
| 127 | FILE *checkf(); |
| 128 | |
| 129 | nfiles = argc; |
| 130 | fnames = argv; |
| 131 | initterm (); |
| 132 | nscroll = Lpp/2 - 1; |
| 133 | if (nscroll <= 0) |
| 134 | nscroll = 1; |
| 135 | if(s = getenv("MORE")) argscan(s); |
| 136 | while (--nfiles > 0) { |
| 137 | if ((ch = (*++fnames)[0]) == '-') { |
| 138 | argscan(*fnames+1); |
| 139 | } |
| 140 | else if (ch == '+') { |
| 141 | s = *fnames; |
| 142 | if (*++s == '/') { |
| 143 | srchopt++; |
| 144 | for (++s, p = initbuf; p < initbuf + 79 && *s != '\0';) |
| 145 | *p++ = *s++; |
| 146 | *p = '\0'; |
| 147 | } |
| 148 | else { |
| 149 | initopt++; |
| 150 | for (initline = 0; *s != '\0'; s++) |
| 151 | if (isdigit (*s)) |
| 152 | initline = initline*10 + *s -'0'; |
| 153 | --initline; |
| 154 | } |
| 155 | } |
| 156 | else break; |
| 157 | } |
| 158 | /* allow clreol only if Home and eraseln and EodClr strings are |
| 159 | * defined, and in that case, make sure we are in noscroll mode |
| 160 | */ |
| 161 | if(clreol) |
| 162 | { |
| 163 | if((Home == NULL) || (*Home == '\0') || |
| 164 | (eraseln == NULL) || (*eraseln == '\0') || |
| 165 | (EodClr == NULL) || (*EodClr == '\0') ) |
| 166 | clreol = 0; |
| 167 | else noscroll = 1; |
| 168 | } |
| 169 | if (dlines == 0) |
| 170 | dlines = Lpp - (noscroll ? 1 : 2); |
| 171 | left = dlines; |
| 172 | if (nfiles > 1) |
| 173 | prnames++; |
| 174 | if (!no_intty && nfiles == 0) { |
| 175 | fputs("Usage: ",stderr); |
| 176 | fputs(argv[0],stderr); |
| 177 | fputs(" [-dfln] [+linenum | +/pattern] name1 name2 ...\n",stderr); |
| 178 | exit(1); |
| 179 | } |
| 180 | else |
| 181 | f = stdin; |
| 182 | if (!no_tty) { |
| 183 | signal(SIGQUIT, onquit); |
| 184 | signal(SIGINT, end_it); |
| 185 | signal(SIGWINCH, chgwinsz); |
| 186 | if (signal (SIGTSTP, SIG_IGN) == SIG_DFL) { |
| 187 | signal(SIGTSTP, onsusp); |
| 188 | catch_susp++; |
| 189 | } |
| 190 | stty (fileno(stderr), &otty); |
| 191 | } |
| 192 | if (no_intty) { |
| 193 | if (no_tty) |
| 194 | copy_file (stdin); |
| 195 | else { |
| 196 | if ((ch = Getc (f)) == '\f') |
| 197 | doclear(); |
| 198 | else { |
| 199 | Ungetc (ch, f); |
| 200 | if (noscroll && (ch != EOF)) { |
| 201 | if (clreol) |
| 202 | home (); |
| 203 | else |
| 204 | doclear (); |
| 205 | } |
| 206 | } |
| 207 | if (srchopt) |
| 208 | { |
| 209 | search (initbuf, stdin, 1); |
| 210 | if (noscroll) |
| 211 | left--; |
| 212 | } |
| 213 | else if (initopt) |
| 214 | skiplns (initline, stdin); |
| 215 | screen (stdin, left); |
| 216 | } |
| 217 | no_intty = 0; |
| 218 | prnames++; |
| 219 | firstf = 0; |
| 220 | } |
| 221 | |
| 222 | while (fnum < nfiles) { |
| 223 | if ((f = checkf (fnames[fnum], &clearit)) != NULL) { |
| 224 | context.line = context.chrctr = 0; |
| 225 | Currline = 0; |
| 226 | if (firstf) setjmp (restore); |
| 227 | if (firstf) { |
| 228 | firstf = 0; |
| 229 | if (srchopt) |
| 230 | { |
| 231 | search (initbuf, f, 1); |
| 232 | if (noscroll) |
| 233 | left--; |
| 234 | } |
| 235 | else if (initopt) |
| 236 | skiplns (initline, f); |
| 237 | } |
| 238 | else if (fnum < nfiles && !no_tty) { |
| 239 | setjmp (restore); |
| 240 | left = command (fnames[fnum], f); |
| 241 | } |
| 242 | if (left != 0) { |
| 243 | if ((noscroll || clearit) && (file_size != 0x7fffffffffffffffL)) |
| 244 | if (clreol) |
| 245 | home (); |
| 246 | else |
| 247 | doclear (); |
| 248 | if (prnames) { |
| 249 | if (bad_so) |
| 250 | erase (0); |
| 251 | if (clreol) |
| 252 | cleareol (); |
| 253 | pr("::::::::::::::"); |
| 254 | if (promptlen > 14) |
| 255 | erase (14); |
| 256 | printf ("\n"); |
| 257 | if(clreol) cleareol(); |
| 258 | printf("%s\n", fnames[fnum]); |
| 259 | if(clreol) cleareol(); |
| 260 | printf("::::::::::::::\n"); |
| 261 | if (left > Lpp - 4) |
| 262 | left = Lpp - 4; |
| 263 | } |
| 264 | if (no_tty) |
| 265 | copy_file (f); |
| 266 | else { |
| 267 | within++; |
| 268 | screen(f, left); |
| 269 | within = 0; |
| 270 | } |
| 271 | } |
| 272 | setjmp (restore); |
| 273 | fflush(stdout); |
| 274 | fclose(f); |
| 275 | screen_start.line = screen_start.chrctr = 0L; |
| 276 | context.line = context.chrctr = 0L; |
| 277 | } |
| 278 | fnum++; |
| 279 | firstf = 0; |
| 280 | } |
| 281 | reset_tty (); |
| 282 | exit(0); |
| 283 | } |
| 284 | |
| 285 | argscan(s) |
| 286 | char *s; |
| 287 | { |
| 288 | for (dlines = 0; *s != '\0'; s++) |
| 289 | { |
| 290 | switch (*s) |
| 291 | { |
| 292 | case '0': case '1': case '2': |
| 293 | case '3': case '4': case '5': |
| 294 | case '6': case '7': case '8': |
| 295 | case '9': |
| 296 | dlines = dlines*10 + *s - '0'; |
| 297 | break; |
| 298 | case 'd': |
| 299 | dum_opt = 1; |
| 300 | break; |
| 301 | case 'l': |
| 302 | stop_opt = 0; |
| 303 | break; |
| 304 | case 'f': |
| 305 | fold_opt = 0; |
| 306 | break; |
| 307 | case 'p': |
| 308 | noscroll++; |
| 309 | break; |
| 310 | case 'c': |
| 311 | clreol++; |
| 312 | break; |
| 313 | case 's': |
| 314 | ssp_opt = 1; |
| 315 | break; |
| 316 | case 'u': |
| 317 | ul_opt = 0; |
| 318 | break; |
| 319 | } |
| 320 | } |
| 321 | } |
| 322 | |
| 323 | |
| 324 | /* |
| 325 | ** Check whether the file named by fs is an ASCII file which the user may |
| 326 | ** access. If it is, return the opened file. Otherwise return NULL. |
| 327 | */ |
| 328 | |
| 329 | FILE * |
| 330 | checkf (fs, clearfirst) |
| 331 | register char *fs; |
| 332 | int *clearfirst; |
| 333 | { |
| 334 | struct stat stbuf; |
| 335 | register FILE *f; |
| 336 | char c; |
| 337 | |
| 338 | if (stat (fs, &stbuf) == -1) { |
| 339 | fflush(stdout); |
| 340 | if (clreol) |
| 341 | cleareol (); |
| 342 | perror(fs); |
| 343 | return (NULL); |
| 344 | } |
| 345 | if ((stbuf.st_mode & S_IFMT) == S_IFDIR) { |
| 346 | printf("\n*** %s: directory ***\n\n", fs); |
| 347 | return (NULL); |
| 348 | } |
| 349 | if ((f=Fopen(fs, "r")) == NULL) { |
| 350 | fflush(stdout); |
| 351 | perror(fs); |
| 352 | return (NULL); |
| 353 | } |
| 354 | /* Try to see whether it is an ASCII file */ |
| 355 | if (magic(f)) { |
| 356 | printf("\n******** %s: Not a text file ********\n\n", fs); |
| 357 | fclose (f); |
| 358 | return (NULL); |
| 359 | } |
| 360 | c = Getc(f); |
| 361 | if (c == '\f') |
| 362 | *clearfirst = 1; |
| 363 | else { |
| 364 | *clearfirst = 0; |
| 365 | Ungetc (c, f); |
| 366 | } |
| 367 | if ((file_size = stbuf.st_size) == 0) |
| 368 | file_size = 0x7fffffffffffffffL; |
| 369 | return (f); |
| 370 | } |
| 371 | |
| 372 | /* |
| 373 | * Check for file magic numbers. This code would best |
| 374 | * be shared with the file(1) program or, perhaps, more |
| 375 | * should not try and be so smart? |
| 376 | */ |
| 377 | magic(f) |
| 378 | FILE *f; |
| 379 | { |
| 380 | long magic; |
| 381 | |
| 382 | magic = getw(f); |
| 383 | if (ftell(f) < sizeof magic) |
| 384 | rewind(f); /* reset file position */ |
| 385 | else |
| 386 | fseek(f, -sizeof (magic), L_INCR); /* reset file position */ |
| 387 | return (magic == 0405 || magic == OMAGIC || magic == NMAGIC || |
| 388 | magic == 0411 || magic == ZMAGIC || magic == 0177545); |
| 389 | } |
| 390 | |
| 391 | /* |
| 392 | ** A real function, for the tputs routine in termlib |
| 393 | */ |
| 394 | |
| 395 | putch (ch) |
| 396 | char ch; |
| 397 | { |
| 398 | putchar (ch); |
| 399 | } |
| 400 | |
| 401 | /* |
| 402 | ** Print out the contents of the file f, one screenful at a time. |
| 403 | */ |
| 404 | |
| 405 | #define STOP -10 |
| 406 | |
| 407 | screen (f, num_lines) |
| 408 | register FILE *f; |
| 409 | register int num_lines; |
| 410 | { |
| 411 | register int c; |
| 412 | register int nchars; |
| 413 | int length; /* length of current line */ |
| 414 | static int prev_len = 1; /* length of previous line */ |
| 415 | |
| 416 | for (;;) { |
| 417 | while (num_lines > 0 && !Pause) { |
| 418 | if ((nchars = getline (f, &length)) == EOF) |
| 419 | { |
| 420 | if (clreol) |
| 421 | clreos(); |
| 422 | return; |
| 423 | } |
| 424 | if (ssp_opt && length == 0 && prev_len == 0) |
| 425 | continue; |
| 426 | prev_len = length; |
| 427 | if (bad_so || (Senter && *Senter == ' ') && promptlen > 0) |
| 428 | erase (0); |
| 429 | /* must clear before drawing line since tabs on some terminals |
| 430 | * do not erase what they tab over. |
| 431 | */ |
| 432 | if (clreol) |
| 433 | cleareol (); |
| 434 | prbuf (Line, length); |
| 435 | if (nchars < promptlen) |
| 436 | erase (nchars); /* erase () sets promptlen to 0 */ |
| 437 | else promptlen = 0; |
| 438 | /* is this needed? |
| 439 | * if (clreol) |
| 440 | * cleareol(); /* must clear again in case we wrapped * |
| 441 | */ |
| 442 | if (nchars < Mcol || !fold_opt) |
| 443 | prbuf("\n", 1); /* will turn off UL if necessary */ |
| 444 | if (nchars == STOP) |
| 445 | break; |
| 446 | num_lines--; |
| 447 | } |
| 448 | if (pstate) { |
| 449 | tputs(ULexit, 1, putch); |
| 450 | pstate = 0; |
| 451 | } |
| 452 | fflush(stdout); |
| 453 | if ((c = Getc(f)) == EOF) |
| 454 | { |
| 455 | if (clreol) |
| 456 | clreos (); |
| 457 | return; |
| 458 | } |
| 459 | |
| 460 | if (Pause && clreol) |
| 461 | clreos (); |
| 462 | Ungetc (c, f); |
| 463 | setjmp (restore); |
| 464 | Pause = 0; startup = 0; |
| 465 | if ((num_lines = command (NULL, f)) == 0) |
| 466 | return; |
| 467 | if (hard && promptlen > 0) |
| 468 | erase (0); |
| 469 | if (noscroll && num_lines >= dlines) |
| 470 | { |
| 471 | if (clreol) |
| 472 | home(); |
| 473 | else |
| 474 | doclear (); |
| 475 | } |
| 476 | screen_start.line = Currline; |
| 477 | screen_start.chrctr = Ftell (f); |
| 478 | } |
| 479 | } |
| 480 | |
| 481 | /* |
| 482 | ** Come here if a quit signal is received |
| 483 | */ |
| 484 | |
| 485 | onquit() |
| 486 | { |
| 487 | signal(SIGQUIT, SIG_IGN); |
| 488 | if (!inwait) { |
| 489 | putchar ('\n'); |
| 490 | if (!startup) { |
| 491 | signal(SIGQUIT, onquit); |
| 492 | longjmp (restore, 1); |
| 493 | } |
| 494 | else |
| 495 | Pause++; |
| 496 | } |
| 497 | else if (!dum_opt && notell) { |
| 498 | write (2, "[Use q or Q to quit]", 20); |
| 499 | promptlen += 20; |
| 500 | notell = 0; |
| 501 | } |
| 502 | signal(SIGQUIT, onquit); |
| 503 | } |
| 504 | |
| 505 | /* |
| 506 | ** Come here if a signal for a window size change is received |
| 507 | */ |
| 508 | |
| 509 | chgwinsz() |
| 510 | { |
| 511 | struct winsize win; |
| 512 | |
| 513 | (void) signal(SIGWINCH, SIG_IGN); |
| 514 | if (ioctl(fileno(stdout), TIOCGWINSZ, &win) != -1) { |
| 515 | if (win.ws_row != 0) { |
| 516 | Lpp = win.ws_row; |
| 517 | nscroll = Lpp/2 - 1; |
| 518 | if (nscroll <= 0) |
| 519 | nscroll = 1; |
| 520 | dlines = Lpp - (noscroll ? 1 : 2); |
| 521 | } |
| 522 | if (win.ws_col != 0) |
| 523 | Mcol = win.ws_col; |
| 524 | } |
| 525 | (void) signal(SIGWINCH, chgwinsz); |
| 526 | } |
| 527 | |
| 528 | /* |
| 529 | ** Clean up terminal state and exit. Also come here if interrupt signal received |
| 530 | */ |
| 531 | |
| 532 | end_it () |
| 533 | { |
| 534 | |
| 535 | reset_tty (); |
| 536 | if (clreol) { |
| 537 | putchar ('\r'); |
| 538 | clreos (); |
| 539 | fflush (stdout); |
| 540 | } |
| 541 | else if (!clreol && (promptlen > 0)) { |
| 542 | kill_line (); |
| 543 | fflush (stdout); |
| 544 | } |
| 545 | else |
| 546 | write (2, "\n", 1); |
| 547 | _exit(0); |
| 548 | } |
| 549 | |
| 550 | copy_file(f) |
| 551 | register FILE *f; |
| 552 | { |
| 553 | register int c; |
| 554 | |
| 555 | while ((c = getc(f)) != EOF) |
| 556 | putchar(c); |
| 557 | } |
| 558 | |
| 559 | /* Simplified printf function */ |
| 560 | |
| 561 | printf (fmt, args) |
| 562 | register char *fmt; |
| 563 | int args; |
| 564 | { |
| 565 | register int *argp; |
| 566 | register char ch; |
| 567 | register int ccount; |
| 568 | |
| 569 | ccount = 0; |
| 570 | argp = &args; |
| 571 | while (*fmt) { |
| 572 | while ((ch = *fmt++) != '%') { |
| 573 | if (ch == '\0') |
| 574 | return (ccount); |
| 575 | ccount++; |
| 576 | putchar (ch); |
| 577 | } |
| 578 | switch (*fmt++) { |
| 579 | case 'd': |
| 580 | ccount += printd (*argp); |
| 581 | break; |
| 582 | case 's': |
| 583 | ccount += pr ((char *)*argp); |
| 584 | break; |
| 585 | case '%': |
| 586 | ccount++; |
| 587 | argp--; |
| 588 | putchar ('%'); |
| 589 | break; |
| 590 | case '0': |
| 591 | return (ccount); |
| 592 | default: |
| 593 | break; |
| 594 | } |
| 595 | ++argp; |
| 596 | } |
| 597 | return (ccount); |
| 598 | |
| 599 | } |
| 600 | |
| 601 | /* |
| 602 | ** Print an integer as a string of decimal digits, |
| 603 | ** returning the length of the print representation. |
| 604 | */ |
| 605 | |
| 606 | printd (n) |
| 607 | int n; |
| 608 | { |
| 609 | int a, nchars; |
| 610 | |
| 611 | if (a = n/10) |
| 612 | nchars = 1 + printd(a); |
| 613 | else |
| 614 | nchars = 1; |
| 615 | putchar (n % 10 + '0'); |
| 616 | return (nchars); |
| 617 | } |
| 618 | |
| 619 | /* Put the print representation of an integer into a string */ |
| 620 | static char *sptr; |
| 621 | |
| 622 | scanstr (n, str) |
| 623 | int n; |
| 624 | char *str; |
| 625 | { |
| 626 | sptr = str; |
| 627 | Sprintf (n); |
| 628 | *sptr = '\0'; |
| 629 | } |
| 630 | |
| 631 | Sprintf (n) |
| 632 | { |
| 633 | int a; |
| 634 | |
| 635 | if (a = n/10) |
| 636 | Sprintf (a); |
| 637 | *sptr++ = n % 10 + '0'; |
| 638 | } |
| 639 | |
| 640 | static char bell = ctrl(G); |
| 641 | |
| 642 | strlen (s) |
| 643 | char *s; |
| 644 | { |
| 645 | register char *p; |
| 646 | |
| 647 | p = s; |
| 648 | while (*p++) |
| 649 | ; |
| 650 | return (p - s - 1); |
| 651 | } |
| 652 | |
| 653 | /* See whether the last component of the path name "path" is equal to the |
| 654 | ** string "string" |
| 655 | */ |
| 656 | |
| 657 | tailequ (path, string) |
| 658 | char *path; |
| 659 | register char *string; |
| 660 | { |
| 661 | register char *tail; |
| 662 | |
| 663 | tail = path + strlen(path); |
| 664 | while (tail >= path) |
| 665 | if (*(--tail) == '/') |
| 666 | break; |
| 667 | ++tail; |
| 668 | while (*tail++ == *string++) |
| 669 | if (*tail == '\0') |
| 670 | return(1); |
| 671 | return(0); |
| 672 | } |
| 673 | |
| 674 | prompt (filename) |
| 675 | char *filename; |
| 676 | { |
| 677 | if (clreol) |
| 678 | cleareol (); |
| 679 | else if (promptlen > 0) |
| 680 | kill_line (); |
| 681 | if (!hard) { |
| 682 | promptlen = 8; |
| 683 | if (Senter && Sexit) { |
| 684 | tputs (Senter, 1, putch); |
| 685 | promptlen += (2 * soglitch); |
| 686 | } |
| 687 | if (clreol) |
| 688 | cleareol (); |
| 689 | pr("--More--"); |
| 690 | if (filename != NULL) { |
| 691 | promptlen += printf ("(Next file: %s)", filename); |
| 692 | } |
| 693 | else if (!no_intty) { |
| 694 | promptlen += printf ("(%d%%)", (int)((file_pos * 100) / file_size)); |
| 695 | } |
| 696 | if (dum_opt) { |
| 697 | promptlen += pr("[Press space to continue, 'q' to quit.]"); |
| 698 | } |
| 699 | if (Senter && Sexit) |
| 700 | tputs (Sexit, 1, putch); |
| 701 | if (clreol) |
| 702 | clreos (); |
| 703 | fflush(stdout); |
| 704 | } |
| 705 | else |
| 706 | write (2, &bell, 1); |
| 707 | inwait++; |
| 708 | } |
| 709 | |
| 710 | /* |
| 711 | ** Get a logical line |
| 712 | */ |
| 713 | |
| 714 | getline(f, length) |
| 715 | register FILE *f; |
| 716 | int *length; |
| 717 | { |
| 718 | register int c; |
| 719 | register char *p; |
| 720 | register int column; |
| 721 | static int colflg; |
| 722 | |
| 723 | p = Line; |
| 724 | column = 0; |
| 725 | c = Getc (f); |
| 726 | if (colflg && c == '\n') { |
| 727 | Currline++; |
| 728 | c = Getc (f); |
| 729 | } |
| 730 | while (p < &Line[LINSIZ - 1]) { |
| 731 | if (c == EOF) { |
| 732 | if (p > Line) { |
| 733 | *p = '\0'; |
| 734 | *length = p - Line; |
| 735 | return (column); |
| 736 | } |
| 737 | *length = p - Line; |
| 738 | return (EOF); |
| 739 | } |
| 740 | if (c == '\n') { |
| 741 | Currline++; |
| 742 | break; |
| 743 | } |
| 744 | *p++ = c; |
| 745 | if (c == '\t') |
| 746 | if (!hardtabs || column < promptlen && !hard) { |
| 747 | if (hardtabs && eraseln && !dumb) { |
| 748 | column = 1 + (column | 7); |
| 749 | tputs (eraseln, 1, putch); |
| 750 | promptlen = 0; |
| 751 | } |
| 752 | else { |
| 753 | for (--p; p < &Line[LINSIZ - 1];) { |
| 754 | *p++ = ' '; |
| 755 | if ((++column & 7) == 0) |
| 756 | break; |
| 757 | } |
| 758 | if (column >= promptlen) promptlen = 0; |
| 759 | } |
| 760 | } |
| 761 | else |
| 762 | column = 1 + (column | 7); |
| 763 | else if (c == '\b' && column > 0) |
| 764 | column--; |
| 765 | else if (c == '\r') |
| 766 | column = 0; |
| 767 | else if (c == '\f' && stop_opt) { |
| 768 | p[-1] = '^'; |
| 769 | *p++ = 'L'; |
| 770 | column += 2; |
| 771 | Pause++; |
| 772 | } |
| 773 | else if (c == EOF) { |
| 774 | *length = p - Line; |
| 775 | return (column); |
| 776 | } |
| 777 | else if (c >= ' ' && c != RUBOUT) |
| 778 | column++; |
| 779 | if (column >= Mcol && fold_opt) break; |
| 780 | c = Getc (f); |
| 781 | } |
| 782 | if (column >= Mcol && Mcol > 0) { |
| 783 | if (!Wrap) { |
| 784 | *p++ = '\n'; |
| 785 | } |
| 786 | } |
| 787 | colflg = column == Mcol && fold_opt; |
| 788 | if (colflg && eatnl && Wrap) { |
| 789 | *p++ = '\n'; /* simulate normal wrap */ |
| 790 | } |
| 791 | *length = p - Line; |
| 792 | *p = 0; |
| 793 | return (column); |
| 794 | } |
| 795 | |
| 796 | /* |
| 797 | ** Erase the rest of the prompt, assuming we are starting at column col. |
| 798 | */ |
| 799 | |
| 800 | erase (col) |
| 801 | register int col; |
| 802 | { |
| 803 | |
| 804 | if (promptlen == 0) |
| 805 | return; |
| 806 | if (hard) { |
| 807 | putchar ('\n'); |
| 808 | } |
| 809 | else { |
| 810 | if (col == 0) |
| 811 | putchar ('\r'); |
| 812 | if (!dumb && eraseln) |
| 813 | tputs (eraseln, 1, putch); |
| 814 | else |
| 815 | for (col = promptlen - col; col > 0; col--) |
| 816 | putchar (' '); |
| 817 | } |
| 818 | promptlen = 0; |
| 819 | } |
| 820 | |
| 821 | /* |
| 822 | ** Erase the current line entirely |
| 823 | */ |
| 824 | |
| 825 | kill_line () |
| 826 | { |
| 827 | erase (0); |
| 828 | if (!eraseln || dumb) putchar ('\r'); |
| 829 | } |
| 830 | |
| 831 | /* |
| 832 | * force clear to end of line |
| 833 | */ |
| 834 | cleareol() |
| 835 | { |
| 836 | tputs(eraseln, 1, putch); |
| 837 | } |
| 838 | |
| 839 | clreos() |
| 840 | { |
| 841 | tputs(EodClr, 1, putch); |
| 842 | } |
| 843 | |
| 844 | /* |
| 845 | ** Print string and return number of characters |
| 846 | */ |
| 847 | |
| 848 | pr(s1) |
| 849 | char *s1; |
| 850 | { |
| 851 | register char *s; |
| 852 | register char c; |
| 853 | |
| 854 | for (s = s1; c = *s++; ) |
| 855 | putchar(c); |
| 856 | return (s - s1 - 1); |
| 857 | } |
| 858 | |
| 859 | |
| 860 | /* Print a buffer of n characters */ |
| 861 | |
| 862 | prbuf (s, n) |
| 863 | register char *s; |
| 864 | register int n; |
| 865 | { |
| 866 | register char c; /* next output character */ |
| 867 | register int state; /* next output char's UL state */ |
| 868 | #define wouldul(s,n) ((n) >= 2 && (((s)[0] == '_' && (s)[1] == '\b') || ((s)[1] == '\b' && (s)[2] == '_'))) |
| 869 | |
| 870 | while (--n >= 0) |
| 871 | if (!ul_opt) |
| 872 | putchar (*s++); |
| 873 | else { |
| 874 | if (*s == ' ' && pstate == 0 && ulglitch && wouldul(s+1, n-1)) { |
| 875 | s++; |
| 876 | continue; |
| 877 | } |
| 878 | if (state = wouldul(s, n)) { |
| 879 | c = (*s == '_')? s[2] : *s ; |
| 880 | n -= 2; |
| 881 | s += 3; |
| 882 | } else |
| 883 | c = *s++; |
| 884 | if (state != pstate) { |
| 885 | if (c == ' ' && state == 0 && ulglitch && wouldul(s, n-1)) |
| 886 | state = 1; |
| 887 | else |
| 888 | tputs(state ? ULenter : ULexit, 1, putch); |
| 889 | } |
| 890 | if (c != ' ' || pstate == 0 || state != 0 || ulglitch == 0) |
| 891 | putchar(c); |
| 892 | if (state && *chUL) { |
| 893 | pr(chBS); |
| 894 | tputs(chUL, 1, putch); |
| 895 | } |
| 896 | pstate = state; |
| 897 | } |
| 898 | } |
| 899 | |
| 900 | /* |
| 901 | ** Clear the screen |
| 902 | */ |
| 903 | |
| 904 | doclear() |
| 905 | { |
| 906 | if (Clear && !hard) { |
| 907 | tputs(Clear, 1, putch); |
| 908 | |
| 909 | /* Put out carriage return so that system doesn't |
| 910 | ** get confused by escape sequences when expanding tabs |
| 911 | */ |
| 912 | putchar ('\r'); |
| 913 | promptlen = 0; |
| 914 | } |
| 915 | } |
| 916 | |
| 917 | /* |
| 918 | * Go to home position |
| 919 | */ |
| 920 | home() |
| 921 | { |
| 922 | tputs(Home,1,putch); |
| 923 | } |
| 924 | |
| 925 | static int lastcmd, lastarg, lastp; |
| 926 | static int lastcolon; |
| 927 | char shell_line[132]; |
| 928 | |
| 929 | /* |
| 930 | ** Read a command and do it. A command consists of an optional integer |
| 931 | ** argument followed by the command character. Return the number of lines |
| 932 | ** to display in the next screenful. If there is nothing more to display |
| 933 | ** in the current file, zero is returned. |
| 934 | */ |
| 935 | |
| 936 | command (filename, f) |
| 937 | char *filename; |
| 938 | register FILE *f; |
| 939 | { |
| 940 | register int nlines; |
| 941 | register int retval; |
| 942 | register char c; |
| 943 | char colonch; |
| 944 | FILE *helpf; |
| 945 | int done; |
| 946 | char comchar, cmdbuf[80], *p; |
| 947 | |
| 948 | #define ret(val) retval=val;done++;break |
| 949 | |
| 950 | done = 0; |
| 951 | if (!errors) |
| 952 | prompt (filename); |
| 953 | else |
| 954 | errors = 0; |
| 955 | if (MBIT == RAW && slow_tty) { |
| 956 | otty.sg_flags |= MBIT; |
| 957 | stty(fileno(stderr), &otty); |
| 958 | } |
| 959 | for (;;) { |
| 960 | nlines = number (&comchar); |
| 961 | lastp = colonch = 0; |
| 962 | if (comchar == '.') { /* Repeat last command */ |
| 963 | lastp++; |
| 964 | comchar = lastcmd; |
| 965 | nlines = lastarg; |
| 966 | if (lastcmd == ':') |
| 967 | colonch = lastcolon; |
| 968 | } |
| 969 | lastcmd = comchar; |
| 970 | lastarg = nlines; |
| 971 | if (comchar == otty.sg_erase) { |
| 972 | kill_line (); |
| 973 | prompt (filename); |
| 974 | continue; |
| 975 | } |
| 976 | switch (comchar) { |
| 977 | case ':': |
| 978 | retval = colon (filename, colonch, nlines); |
| 979 | if (retval >= 0) |
| 980 | done++; |
| 981 | break; |
| 982 | case 'b': |
| 983 | case ctrl(B): |
| 984 | { |
| 985 | register int initline; |
| 986 | |
| 987 | if (no_intty) { |
| 988 | write(2, &bell, 1); |
| 989 | return (-1); |
| 990 | } |
| 991 | |
| 992 | if (nlines == 0) nlines++; |
| 993 | |
| 994 | putchar ('\r'); |
| 995 | erase (0); |
| 996 | printf ("\n"); |
| 997 | if (clreol) |
| 998 | cleareol (); |
| 999 | printf ("...back %d page", nlines); |
| 1000 | if (nlines > 1) |
| 1001 | pr ("s\n"); |
| 1002 | else |
| 1003 | pr ("\n"); |
| 1004 | |
| 1005 | if (clreol) |
| 1006 | cleareol (); |
| 1007 | pr ("\n"); |
| 1008 | |
| 1009 | initline = Currline - dlines * (nlines + 1); |
| 1010 | if (! noscroll) |
| 1011 | --initline; |
| 1012 | if (initline < 0) initline = 0; |
| 1013 | Fseek(f, 0L); |
| 1014 | Currline = 0; /* skiplns() will make Currline correct */ |
| 1015 | skiplns(initline, f); |
| 1016 | if (! noscroll) { |
| 1017 | ret(dlines + 1); |
| 1018 | } |
| 1019 | else { |
| 1020 | ret(dlines); |
| 1021 | } |
| 1022 | } |
| 1023 | case ' ': |
| 1024 | case 'z': |
| 1025 | if (nlines == 0) nlines = dlines; |
| 1026 | else if (comchar == 'z') dlines = nlines; |
| 1027 | ret (nlines); |
| 1028 | case 'd': |
| 1029 | case ctrl(D): |
| 1030 | if (nlines != 0) nscroll = nlines; |
| 1031 | ret (nscroll); |
| 1032 | case 'q': |
| 1033 | case 'Q': |
| 1034 | end_it (); |
| 1035 | case 's': |
| 1036 | case 'f': |
| 1037 | if (nlines == 0) nlines++; |
| 1038 | if (comchar == 'f') |
| 1039 | nlines *= dlines; |
| 1040 | putchar ('\r'); |
| 1041 | erase (0); |
| 1042 | printf ("\n"); |
| 1043 | if (clreol) |
| 1044 | cleareol (); |
| 1045 | printf ("...skipping %d line", nlines); |
| 1046 | if (nlines > 1) |
| 1047 | pr ("s\n"); |
| 1048 | else |
| 1049 | pr ("\n"); |
| 1050 | |
| 1051 | if (clreol) |
| 1052 | cleareol (); |
| 1053 | pr ("\n"); |
| 1054 | |
| 1055 | while (nlines > 0) { |
| 1056 | while ((c = Getc (f)) != '\n') |
| 1057 | if (c == EOF) { |
| 1058 | retval = 0; |
| 1059 | done++; |
| 1060 | goto endsw; |
| 1061 | } |
| 1062 | Currline++; |
| 1063 | nlines--; |
| 1064 | } |
| 1065 | ret (dlines); |
| 1066 | case '\n': |
| 1067 | if (nlines != 0) |
| 1068 | dlines = nlines; |
| 1069 | else |
| 1070 | nlines = 1; |
| 1071 | ret (nlines); |
| 1072 | case '\f': |
| 1073 | if (!no_intty) { |
| 1074 | doclear (); |
| 1075 | Fseek (f, screen_start.chrctr); |
| 1076 | Currline = screen_start.line; |
| 1077 | ret (dlines); |
| 1078 | } |
| 1079 | else { |
| 1080 | write (2, &bell, 1); |
| 1081 | break; |
| 1082 | } |
| 1083 | case '\'': |
| 1084 | if (!no_intty) { |
| 1085 | kill_line (); |
| 1086 | pr ("\n***Back***\n\n"); |
| 1087 | Fseek (f, context.chrctr); |
| 1088 | Currline = context.line; |
| 1089 | ret (dlines); |
| 1090 | } |
| 1091 | else { |
| 1092 | write (2, &bell, 1); |
| 1093 | break; |
| 1094 | } |
| 1095 | case '=': |
| 1096 | kill_line (); |
| 1097 | promptlen = printd (Currline); |
| 1098 | fflush (stdout); |
| 1099 | break; |
| 1100 | case 'n': |
| 1101 | lastp++; |
| 1102 | case '/': |
| 1103 | if (nlines == 0) nlines++; |
| 1104 | kill_line (); |
| 1105 | pr ("/"); |
| 1106 | promptlen = 1; |
| 1107 | fflush (stdout); |
| 1108 | if (lastp) { |
| 1109 | write (2,"\r", 1); |
| 1110 | search (NULL, f, nlines); /* Use previous r.e. */ |
| 1111 | } |
| 1112 | else { |
| 1113 | ttyin (cmdbuf, 78, '/'); |
| 1114 | write (2, "\r", 1); |
| 1115 | search (cmdbuf, f, nlines); |
| 1116 | } |
| 1117 | ret (dlines-1); |
| 1118 | case '!': |
| 1119 | do_shell (filename); |
| 1120 | break; |
| 1121 | case '?': |
| 1122 | case 'h': |
| 1123 | if ((helpf = fopen (HELPFILE, "r")) == NULL) |
| 1124 | error ("Can't open help file"); |
| 1125 | if (noscroll) doclear (); |
| 1126 | copy_file (helpf); |
| 1127 | fclose (helpf); |
| 1128 | prompt (filename); |
| 1129 | break; |
| 1130 | case 'v': /* This case should go right before default */ |
| 1131 | if (!no_intty) { |
| 1132 | kill_line (); |
| 1133 | cmdbuf[0] = '+'; |
| 1134 | scanstr (Currline - dlines < 0 ? 0 |
| 1135 | : Currline - (dlines + 1) / 2, &cmdbuf[1]); |
| 1136 | pr ("vi "); pr (cmdbuf); putchar (' '); pr (fnames[fnum]); |
| 1137 | execute (filename, VI, "vi", cmdbuf, fnames[fnum], 0); |
| 1138 | break; |
| 1139 | } |
| 1140 | default: |
| 1141 | if (dum_opt) { |
| 1142 | kill_line (); |
| 1143 | if (Senter && Sexit) { |
| 1144 | tputs (Senter, 1, putch); |
| 1145 | promptlen = pr ("[Press 'h' for instructions.]") + (2 * soglitch); |
| 1146 | tputs (Sexit, 1, putch); |
| 1147 | } |
| 1148 | else |
| 1149 | promptlen = pr ("[Press 'h' for instructions.]"); |
| 1150 | fflush (stdout); |
| 1151 | } |
| 1152 | else |
| 1153 | write (2, &bell, 1); |
| 1154 | break; |
| 1155 | } |
| 1156 | if (done) break; |
| 1157 | } |
| 1158 | putchar ('\r'); |
| 1159 | endsw: |
| 1160 | inwait = 0; |
| 1161 | notell++; |
| 1162 | if (MBIT == RAW && slow_tty) { |
| 1163 | otty.sg_flags &= ~MBIT; |
| 1164 | stty(fileno(stderr), &otty); |
| 1165 | } |
| 1166 | return (retval); |
| 1167 | } |
| 1168 | |
| 1169 | char ch; |
| 1170 | |
| 1171 | /* |
| 1172 | * Execute a colon-prefixed command. |
| 1173 | * Returns <0 if not a command that should cause |
| 1174 | * more of the file to be printed. |
| 1175 | */ |
| 1176 | |
| 1177 | colon (filename, cmd, nlines) |
| 1178 | char *filename; |
| 1179 | int cmd; |
| 1180 | int nlines; |
| 1181 | { |
| 1182 | if (cmd == 0) |
| 1183 | ch = readch (); |
| 1184 | else |
| 1185 | ch = cmd; |
| 1186 | lastcolon = ch; |
| 1187 | switch (ch) { |
| 1188 | case 'f': |
| 1189 | kill_line (); |
| 1190 | if (!no_intty) |
| 1191 | promptlen = printf ("\"%s\" line %d", fnames[fnum], Currline); |
| 1192 | else |
| 1193 | promptlen = printf ("[Not a file] line %d", Currline); |
| 1194 | fflush (stdout); |
| 1195 | return (-1); |
| 1196 | case 'n': |
| 1197 | if (nlines == 0) { |
| 1198 | if (fnum >= nfiles - 1) |
| 1199 | end_it (); |
| 1200 | nlines++; |
| 1201 | } |
| 1202 | putchar ('\r'); |
| 1203 | erase (0); |
| 1204 | skipf (nlines); |
| 1205 | return (0); |
| 1206 | case 'p': |
| 1207 | if (no_intty) { |
| 1208 | write (2, &bell, 1); |
| 1209 | return (-1); |
| 1210 | } |
| 1211 | putchar ('\r'); |
| 1212 | erase (0); |
| 1213 | if (nlines == 0) |
| 1214 | nlines++; |
| 1215 | skipf (-nlines); |
| 1216 | return (0); |
| 1217 | case '!': |
| 1218 | do_shell (filename); |
| 1219 | return (-1); |
| 1220 | case 'q': |
| 1221 | case 'Q': |
| 1222 | end_it (); |
| 1223 | default: |
| 1224 | write (2, &bell, 1); |
| 1225 | return (-1); |
| 1226 | } |
| 1227 | } |
| 1228 | |
| 1229 | /* |
| 1230 | ** Read a decimal number from the terminal. Set cmd to the non-digit which |
| 1231 | ** terminates the number. |
| 1232 | */ |
| 1233 | |
| 1234 | number(cmd) |
| 1235 | char *cmd; |
| 1236 | { |
| 1237 | register int i; |
| 1238 | |
| 1239 | i = 0; ch = otty.sg_kill; |
| 1240 | for (;;) { |
| 1241 | ch = readch (); |
| 1242 | if (ch >= '0' && ch <= '9') |
| 1243 | i = i*10 + ch - '0'; |
| 1244 | else if (ch == otty.sg_kill) |
| 1245 | i = 0; |
| 1246 | else { |
| 1247 | *cmd = ch; |
| 1248 | break; |
| 1249 | } |
| 1250 | } |
| 1251 | return (i); |
| 1252 | } |
| 1253 | |
| 1254 | do_shell (filename) |
| 1255 | char *filename; |
| 1256 | { |
| 1257 | char cmdbuf[80]; |
| 1258 | |
| 1259 | kill_line (); |
| 1260 | pr ("!"); |
| 1261 | fflush (stdout); |
| 1262 | promptlen = 1; |
| 1263 | if (lastp) |
| 1264 | pr (shell_line); |
| 1265 | else { |
| 1266 | ttyin (cmdbuf, 78, '!'); |
| 1267 | if (expand (shell_line, cmdbuf)) { |
| 1268 | kill_line (); |
| 1269 | promptlen = printf ("!%s", shell_line); |
| 1270 | } |
| 1271 | } |
| 1272 | fflush (stdout); |
| 1273 | write (2, "\n", 1); |
| 1274 | promptlen = 0; |
| 1275 | shellp = 1; |
| 1276 | execute (filename, shell, shell, "-c", shell_line, 0); |
| 1277 | } |
| 1278 | |
| 1279 | /* |
| 1280 | ** Search for nth ocurrence of regular expression contained in buf in the file |
| 1281 | */ |
| 1282 | |
| 1283 | search (buf, file, n) |
| 1284 | char buf[]; |
| 1285 | FILE *file; |
| 1286 | register int n; |
| 1287 | { |
| 1288 | long startline = Ftell (file); |
| 1289 | register long line1 = startline; |
| 1290 | register long line2 = startline; |
| 1291 | register long line3 = startline; |
| 1292 | register int lncount; |
| 1293 | int saveln, rv, re_exec(); |
| 1294 | char *s, *re_comp(); |
| 1295 | |
| 1296 | context.line = saveln = Currline; |
| 1297 | context.chrctr = startline; |
| 1298 | lncount = 0; |
| 1299 | if ((s = re_comp (buf)) != 0) |
| 1300 | error (s); |
| 1301 | while (!feof (file)) { |
| 1302 | line3 = line2; |
| 1303 | line2 = line1; |
| 1304 | line1 = Ftell (file); |
| 1305 | rdline (file); |
| 1306 | lncount++; |
| 1307 | if ((rv = re_exec (Line)) == 1) |
| 1308 | if (--n == 0) { |
| 1309 | if (lncount > 3 || (lncount > 1 && no_intty)) |
| 1310 | { |
| 1311 | pr ("\n"); |
| 1312 | if (clreol) |
| 1313 | cleareol (); |
| 1314 | pr("...skipping\n"); |
| 1315 | } |
| 1316 | if (!no_intty) { |
| 1317 | Currline -= (lncount >= 3 ? 3 : lncount); |
| 1318 | Fseek (file, line3); |
| 1319 | if (noscroll) |
| 1320 | if (clreol) { |
| 1321 | home (); |
| 1322 | cleareol (); |
| 1323 | } |
| 1324 | else |
| 1325 | doclear (); |
| 1326 | } |
| 1327 | else { |
| 1328 | kill_line (); |
| 1329 | if (noscroll) |
| 1330 | if (clreol) { |
| 1331 | home (); |
| 1332 | cleareol (); |
| 1333 | } |
| 1334 | else |
| 1335 | doclear (); |
| 1336 | pr (Line); |
| 1337 | putchar ('\n'); |
| 1338 | } |
| 1339 | break; |
| 1340 | } |
| 1341 | else if (rv == -1) |
| 1342 | error ("Regular expression botch"); |
| 1343 | } |
| 1344 | if (feof (file)) { |
| 1345 | if (!no_intty) { |
| 1346 | file->_flag &= ~_IOEOF; /* why doesn't fseek do this ??!!??! */ |
| 1347 | Currline = saveln; |
| 1348 | Fseek (file, startline); |
| 1349 | } |
| 1350 | else { |
| 1351 | pr ("\nPattern not found\n"); |
| 1352 | end_it (); |
| 1353 | } |
| 1354 | error ("Pattern not found"); |
| 1355 | } |
| 1356 | } |
| 1357 | |
| 1358 | execute (filename, cmd, args) |
| 1359 | char *filename; |
| 1360 | char *cmd, *args; |
| 1361 | { |
| 1362 | int id; |
| 1363 | int n; |
| 1364 | |
| 1365 | fflush (stdout); |
| 1366 | reset_tty (); |
| 1367 | for (n = 10; (id = fork ()) < 0 && n > 0; n--) |
| 1368 | sleep (5); |
| 1369 | if (id == 0) { |
| 1370 | if (!isatty(0)) { |
| 1371 | close(0); |
| 1372 | open("/dev/tty", 0); |
| 1373 | } |
| 1374 | execv (cmd, &args); |
| 1375 | write (2, "exec failed\n", 12); |
| 1376 | exit (1); |
| 1377 | } |
| 1378 | if (id > 0) { |
| 1379 | signal (SIGINT, SIG_IGN); |
| 1380 | signal (SIGQUIT, SIG_IGN); |
| 1381 | if (catch_susp) |
| 1382 | signal(SIGTSTP, SIG_DFL); |
| 1383 | while (wait(0) > 0); |
| 1384 | signal (SIGINT, end_it); |
| 1385 | signal (SIGQUIT, onquit); |
| 1386 | if (catch_susp) |
| 1387 | signal(SIGTSTP, onsusp); |
| 1388 | } else |
| 1389 | write(2, "can't fork\n", 11); |
| 1390 | set_tty (); |
| 1391 | pr ("------------------------\n"); |
| 1392 | prompt (filename); |
| 1393 | } |
| 1394 | /* |
| 1395 | ** Skip n lines in the file f |
| 1396 | */ |
| 1397 | |
| 1398 | skiplns (n, f) |
| 1399 | register int n; |
| 1400 | register FILE *f; |
| 1401 | { |
| 1402 | register char c; |
| 1403 | |
| 1404 | while (n > 0) { |
| 1405 | while ((c = Getc (f)) != '\n') |
| 1406 | if (c == EOF) |
| 1407 | return; |
| 1408 | n--; |
| 1409 | Currline++; |
| 1410 | } |
| 1411 | } |
| 1412 | |
| 1413 | /* |
| 1414 | ** Skip nskip files in the file list (from the command line). Nskip may be |
| 1415 | ** negative. |
| 1416 | */ |
| 1417 | |
| 1418 | skipf (nskip) |
| 1419 | register int nskip; |
| 1420 | { |
| 1421 | if (nskip == 0) return; |
| 1422 | if (nskip > 0) { |
| 1423 | if (fnum + nskip > nfiles - 1) |
| 1424 | nskip = nfiles - fnum - 1; |
| 1425 | } |
| 1426 | else if (within) |
| 1427 | ++fnum; |
| 1428 | fnum += nskip; |
| 1429 | if (fnum < 0) |
| 1430 | fnum = 0; |
| 1431 | pr ("\n...Skipping "); |
| 1432 | pr ("\n"); |
| 1433 | if (clreol) |
| 1434 | cleareol (); |
| 1435 | pr ("...Skipping "); |
| 1436 | pr (nskip > 0 ? "to file " : "back to file "); |
| 1437 | pr (fnames[fnum]); |
| 1438 | pr ("\n"); |
| 1439 | if (clreol) |
| 1440 | cleareol (); |
| 1441 | pr ("\n"); |
| 1442 | --fnum; |
| 1443 | } |
| 1444 | |
| 1445 | /*----------------------------- Terminal I/O -------------------------------*/ |
| 1446 | |
| 1447 | initterm () |
| 1448 | { |
| 1449 | char buf[TBUFSIZ]; |
| 1450 | static char clearbuf[TBUFSIZ]; |
| 1451 | char *clearptr, *padstr; |
| 1452 | int ldisc; |
| 1453 | int lmode; |
| 1454 | char *term; |
| 1455 | int tgrp; |
| 1456 | struct winsize win; |
| 1457 | |
| 1458 | retry: |
| 1459 | if (!(no_tty = gtty(fileno(stdout), &otty))) { |
| 1460 | if (ioctl(fileno(stdout), TIOCLGET, &lmode) < 0) { |
| 1461 | perror("TIOCLGET"); |
| 1462 | exit(1); |
| 1463 | } |
| 1464 | docrterase = ((lmode & LCRTERA) != 0); |
| 1465 | docrtkill = ((lmode & LCRTKIL) != 0); |
| 1466 | /* |
| 1467 | * Wait until we're in the foreground before we save the |
| 1468 | * the terminal modes. |
| 1469 | */ |
| 1470 | if (ioctl(fileno(stdout), TIOCGPGRP, &tgrp) < 0) { |
| 1471 | perror("TIOCGPGRP"); |
| 1472 | exit(1); |
| 1473 | } |
| 1474 | if (tgrp != getpgrp(0)) { |
| 1475 | kill(0, SIGTTOU); |
| 1476 | goto retry; |
| 1477 | } |
| 1478 | if ((term = getenv("TERM")) == 0 || tgetent(buf, term) <= 0) { |
| 1479 | dumb++; ul_opt = 0; |
| 1480 | } |
| 1481 | else { |
| 1482 | if (ioctl(fileno(stdout), TIOCGWINSZ, &win) < 0) { |
| 1483 | Lpp = tgetnum("li"); |
| 1484 | Mcol = tgetnum("co"); |
| 1485 | } else { |
| 1486 | if ((Lpp = win.ws_row) == 0) |
| 1487 | Lpp = tgetnum("li"); |
| 1488 | if ((Mcol = win.ws_col) == 0) |
| 1489 | Mcol = tgetnum("co"); |
| 1490 | } |
| 1491 | if ((Lpp <= 0) || tgetflag("hc")) { |
| 1492 | hard++; /* Hard copy terminal */ |
| 1493 | Lpp = 24; |
| 1494 | } |
| 1495 | if (tgetflag("xn")) |
| 1496 | eatnl++; /* Eat newline at last column + 1; dec, concept */ |
| 1497 | if (Mcol <= 0) |
| 1498 | Mcol = 80; |
| 1499 | |
| 1500 | if (tailequ (fnames[0], "page") || !hard && tgetflag("ns")) |
| 1501 | noscroll++; |
| 1502 | Wrap = tgetflag("am"); |
| 1503 | bad_so = tgetflag ("xs"); |
| 1504 | clearptr = clearbuf; |
| 1505 | eraseln = tgetstr("ce",&clearptr); |
| 1506 | Clear = tgetstr("cl", &clearptr); |
| 1507 | Senter = tgetstr("so", &clearptr); |
| 1508 | Sexit = tgetstr("se", &clearptr); |
| 1509 | if ((soglitch = tgetnum("sg")) < 0) |
| 1510 | soglitch = 0; |
| 1511 | |
| 1512 | /* |
| 1513 | * Set up for underlining: some terminals don't need it; |
| 1514 | * others have start/stop sequences, still others have an |
| 1515 | * underline char sequence which is assumed to move the |
| 1516 | * cursor forward one character. If underline sequence |
| 1517 | * isn't available, settle for standout sequence. |
| 1518 | */ |
| 1519 | |
| 1520 | if (tgetflag("ul") || tgetflag("os")) |
| 1521 | ul_opt = 0; |
| 1522 | if ((chUL = tgetstr("uc", &clearptr)) == NULL ) |
| 1523 | chUL = ""; |
| 1524 | if (((ULenter = tgetstr("us", &clearptr)) == NULL || |
| 1525 | (ULexit = tgetstr("ue", &clearptr)) == NULL) && !*chUL) { |
| 1526 | if ((ULenter = Senter) == NULL || (ULexit = Sexit) == NULL) { |
| 1527 | ULenter = ""; |
| 1528 | ULexit = ""; |
| 1529 | } else |
| 1530 | ulglitch = soglitch; |
| 1531 | } else { |
| 1532 | if ((ulglitch = tgetnum("ug")) < 0) |
| 1533 | ulglitch = 0; |
| 1534 | } |
| 1535 | |
| 1536 | if (padstr = tgetstr("pc", &clearptr)) |
| 1537 | PC = *padstr; |
| 1538 | Home = tgetstr("ho",&clearptr); |
| 1539 | if (Home == 0 || *Home == '\0') |
| 1540 | { |
| 1541 | if ((cursorm = tgetstr("cm", &clearptr)) != NULL) { |
| 1542 | strcpy(cursorhome, tgoto(cursorm, 0, 0)); |
| 1543 | Home = cursorhome; |
| 1544 | } |
| 1545 | } |
| 1546 | EodClr = tgetstr("cd", &clearptr); |
| 1547 | if ((chBS = tgetstr("bc", &clearptr)) == NULL) |
| 1548 | chBS = "\b"; |
| 1549 | |
| 1550 | } |
| 1551 | if ((shell = getenv("SHELL")) == NULL) |
| 1552 | shell = "/bin/sh"; |
| 1553 | } |
| 1554 | no_intty = gtty(fileno(stdin), &otty); |
| 1555 | gtty(fileno(stderr), &otty); |
| 1556 | savetty = otty; |
| 1557 | ospeed = otty.sg_ospeed; |
| 1558 | slow_tty = ospeed < B1200; |
| 1559 | hardtabs = (otty.sg_flags & TBDELAY) != XTABS; |
| 1560 | if (!no_tty) { |
| 1561 | otty.sg_flags &= ~ECHO; |
| 1562 | if (MBIT == CBREAK || !slow_tty) |
| 1563 | otty.sg_flags |= MBIT; |
| 1564 | } |
| 1565 | } |
| 1566 | |
| 1567 | readch () |
| 1568 | { |
| 1569 | char ch; |
| 1570 | extern int errno; |
| 1571 | |
| 1572 | errno = 0; |
| 1573 | if (read (2, &ch, 1) <= 0) |
| 1574 | if (errno != EINTR) |
| 1575 | end_it(); |
| 1576 | else |
| 1577 | ch = otty.sg_kill; |
| 1578 | return (ch); |
| 1579 | } |
| 1580 | |
| 1581 | static char BS = '\b'; |
| 1582 | static char *BSB = "\b \b"; |
| 1583 | static char CARAT = '^'; |
| 1584 | #define ERASEONECHAR \ |
| 1585 | if (docrterase) \ |
| 1586 | write (2, BSB, sizeof(BSB)); \ |
| 1587 | else \ |
| 1588 | write (2, &BS, sizeof(BS)); |
| 1589 | |
| 1590 | ttyin (buf, nmax, pchar) |
| 1591 | char buf[]; |
| 1592 | register int nmax; |
| 1593 | char pchar; |
| 1594 | { |
| 1595 | register char *sptr; |
| 1596 | register char ch; |
| 1597 | register int slash = 0; |
| 1598 | int maxlen; |
| 1599 | char cbuf; |
| 1600 | |
| 1601 | sptr = buf; |
| 1602 | maxlen = 0; |
| 1603 | while (sptr - buf < nmax) { |
| 1604 | if (promptlen > maxlen) maxlen = promptlen; |
| 1605 | ch = readch (); |
| 1606 | if (ch == '\\') { |
| 1607 | slash++; |
| 1608 | } |
| 1609 | else if ((ch == otty.sg_erase) && !slash) { |
| 1610 | if (sptr > buf) { |
| 1611 | --promptlen; |
| 1612 | ERASEONECHAR |
| 1613 | --sptr; |
| 1614 | if ((*sptr < ' ' && *sptr != '\n') || *sptr == RUBOUT) { |
| 1615 | --promptlen; |
| 1616 | ERASEONECHAR |
| 1617 | } |
| 1618 | continue; |
| 1619 | } |
| 1620 | else { |
| 1621 | if (!eraseln) promptlen = maxlen; |
| 1622 | longjmp (restore, 1); |
| 1623 | } |
| 1624 | } |
| 1625 | else if ((ch == otty.sg_kill) && !slash) { |
| 1626 | if (hard) { |
| 1627 | show (ch); |
| 1628 | putchar ('\n'); |
| 1629 | putchar (pchar); |
| 1630 | } |
| 1631 | else { |
| 1632 | putchar ('\r'); |
| 1633 | putchar (pchar); |
| 1634 | if (eraseln) |
| 1635 | erase (1); |
| 1636 | else if (docrtkill) |
| 1637 | while (promptlen-- > 1) |
| 1638 | write (2, BSB, sizeof(BSB)); |
| 1639 | promptlen = 1; |
| 1640 | } |
| 1641 | sptr = buf; |
| 1642 | fflush (stdout); |
| 1643 | continue; |
| 1644 | } |
| 1645 | if (slash && (ch == otty.sg_kill || ch == otty.sg_erase)) { |
| 1646 | ERASEONECHAR |
| 1647 | --sptr; |
| 1648 | } |
| 1649 | if (ch != '\\') |
| 1650 | slash = 0; |
| 1651 | *sptr++ = ch; |
| 1652 | if ((ch < ' ' && ch != '\n' && ch != ESC) || ch == RUBOUT) { |
| 1653 | ch += ch == RUBOUT ? -0100 : 0100; |
| 1654 | write (2, &CARAT, 1); |
| 1655 | promptlen++; |
| 1656 | } |
| 1657 | cbuf = ch; |
| 1658 | if (ch != '\n' && ch != ESC) { |
| 1659 | write (2, &cbuf, 1); |
| 1660 | promptlen++; |
| 1661 | } |
| 1662 | else |
| 1663 | break; |
| 1664 | } |
| 1665 | *--sptr = '\0'; |
| 1666 | if (!eraseln) promptlen = maxlen; |
| 1667 | if (sptr - buf >= nmax - 1) |
| 1668 | error ("Line too long"); |
| 1669 | } |
| 1670 | |
| 1671 | expand (outbuf, inbuf) |
| 1672 | char *outbuf; |
| 1673 | char *inbuf; |
| 1674 | { |
| 1675 | register char *instr; |
| 1676 | register char *outstr; |
| 1677 | register char ch; |
| 1678 | char temp[200]; |
| 1679 | int changed = 0; |
| 1680 | |
| 1681 | instr = inbuf; |
| 1682 | outstr = temp; |
| 1683 | while ((ch = *instr++) != '\0') |
| 1684 | switch (ch) { |
| 1685 | case '%': |
| 1686 | if (!no_intty) { |
| 1687 | strcpy (outstr, fnames[fnum]); |
| 1688 | outstr += strlen (fnames[fnum]); |
| 1689 | changed++; |
| 1690 | } |
| 1691 | else |
| 1692 | *outstr++ = ch; |
| 1693 | break; |
| 1694 | case '!': |
| 1695 | if (!shellp) |
| 1696 | error ("No previous command to substitute for"); |
| 1697 | strcpy (outstr, shell_line); |
| 1698 | outstr += strlen (shell_line); |
| 1699 | changed++; |
| 1700 | break; |
| 1701 | case '\\': |
| 1702 | if (*instr == '%' || *instr == '!') { |
| 1703 | *outstr++ = *instr++; |
| 1704 | break; |
| 1705 | } |
| 1706 | default: |
| 1707 | *outstr++ = ch; |
| 1708 | } |
| 1709 | *outstr++ = '\0'; |
| 1710 | strcpy (outbuf, temp); |
| 1711 | return (changed); |
| 1712 | } |
| 1713 | |
| 1714 | show (ch) |
| 1715 | register char ch; |
| 1716 | { |
| 1717 | char cbuf; |
| 1718 | |
| 1719 | if ((ch < ' ' && ch != '\n' && ch != ESC) || ch == RUBOUT) { |
| 1720 | ch += ch == RUBOUT ? -0100 : 0100; |
| 1721 | write (2, &CARAT, 1); |
| 1722 | promptlen++; |
| 1723 | } |
| 1724 | cbuf = ch; |
| 1725 | write (2, &cbuf, 1); |
| 1726 | promptlen++; |
| 1727 | } |
| 1728 | |
| 1729 | error (mess) |
| 1730 | char *mess; |
| 1731 | { |
| 1732 | if (clreol) |
| 1733 | cleareol (); |
| 1734 | else |
| 1735 | kill_line (); |
| 1736 | promptlen += strlen (mess); |
| 1737 | if (Senter && Sexit) { |
| 1738 | tputs (Senter, 1, putch); |
| 1739 | pr(mess); |
| 1740 | tputs (Sexit, 1, putch); |
| 1741 | } |
| 1742 | else |
| 1743 | pr (mess); |
| 1744 | fflush(stdout); |
| 1745 | errors++; |
| 1746 | longjmp (restore, 1); |
| 1747 | } |
| 1748 | |
| 1749 | |
| 1750 | set_tty () |
| 1751 | { |
| 1752 | otty.sg_flags |= MBIT; |
| 1753 | otty.sg_flags &= ~ECHO; |
| 1754 | stty(fileno(stderr), &otty); |
| 1755 | } |
| 1756 | |
| 1757 | reset_tty () |
| 1758 | { |
| 1759 | if (no_tty) |
| 1760 | return; |
| 1761 | if (pstate) { |
| 1762 | tputs(ULexit, 1, putch); |
| 1763 | fflush(stdout); |
| 1764 | pstate = 0; |
| 1765 | } |
| 1766 | otty.sg_flags |= ECHO; |
| 1767 | otty.sg_flags &= ~MBIT; |
| 1768 | stty(fileno(stderr), &savetty); |
| 1769 | } |
| 1770 | |
| 1771 | rdline (f) |
| 1772 | register FILE *f; |
| 1773 | { |
| 1774 | register char c; |
| 1775 | register char *p; |
| 1776 | |
| 1777 | p = Line; |
| 1778 | while ((c = Getc (f)) != '\n' && c != EOF && p - Line < LINSIZ - 1) |
| 1779 | *p++ = c; |
| 1780 | if (c == '\n') |
| 1781 | Currline++; |
| 1782 | *p = '\0'; |
| 1783 | } |
| 1784 | |
| 1785 | /* Come here when we get a suspend signal from the terminal */ |
| 1786 | |
| 1787 | onsusp () |
| 1788 | { |
| 1789 | /* ignore SIGTTOU so we don't get stopped if csh grabs the tty */ |
| 1790 | signal(SIGTTOU, SIG_IGN); |
| 1791 | reset_tty (); |
| 1792 | fflush (stdout); |
| 1793 | signal(SIGTTOU, SIG_DFL); |
| 1794 | /* Send the TSTP signal to suspend our process group */ |
| 1795 | signal(SIGTSTP, SIG_DFL); |
| 1796 | sigsetmask(0); |
| 1797 | kill (0, SIGTSTP); |
| 1798 | /* Pause for station break */ |
| 1799 | |
| 1800 | /* We're back */ |
| 1801 | signal (SIGTSTP, onsusp); |
| 1802 | set_tty (); |
| 1803 | if (inwait) |
| 1804 | longjmp (restore); |
| 1805 | } |