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1.1 ! root 1: /* ! 2: * more: COHERENT port of traditional Berkeley pager ! 3: * Last rev 06/14/91 ! 4: */ ! 5: ! 6: /* ! 7: * Copyright (c) 1980 Regents of the University of California. ! 8: * All rights reserved. ! 9: * ! 10: * Redistribution and use in source and binary forms are permitted ! 11: * provided that the above copyright notice and this paragraph are ! 12: * duplicated in all such forms and that any documentation, ! 13: * advertising materials, and other materials related to such ! 14: * distribution and use acknowledge that the software was developed ! 15: * by the University of California, Berkeley. The name of the ! 16: * University may not be used to endorse or promote products derived ! 17: * from this software without specific prior written permission. ! 18: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR ! 19: * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED ! 20: * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. ! 21: */ ! 22: #ifndef lint ! 23: char copyright[] = ! 24: "@(#) Copyright (c) 1980 Regents of the University of California.\n\ ! 25: All rights reserved.\n"; ! 26: #endif /* not lint */ ! 27: ! 28: #ifndef lint ! 29: static char sccsid[] = "@(#)more.c 5.22 (Berkeley) 7/30/89"; ! 30: #endif /* not lint */ ! 31: ! 32: /* ! 33: ** more.c - General purpose tty output filter and file perusal program ! 34: ** ! 35: ** by Eric Shienbrood, UC Berkeley ! 36: ** ! 37: ** modified by Geoff Peck, UCB to add underlining, single spacing ! 38: ** modified by John Foderaro, UCB to add -c and MORE environment variable ! 39: */ ! 40: ! 41: #include <stdio.h> ! 42: #include <sys/param.h> ! 43: #include <ctype.h> ! 44: #include <signal.h> ! 45: #include <errno.h> ! 46: #include <sgtty.h> ! 47: #include <setjmp.h> ! 48: #include <sys/stat.h> ! 49: #include <varargs.h> ! 50: #include "pathnames.h" ! 51: ! 52: #if COHERENT ! 53: #include <l.out.h> ! 54: #include <sys/mdata.h> ! 55: #include <canon.h> ! 56: #ifdef _I386 ! 57: #include <misc.h> ! 58: #else ! 59: #include "regexp.h" ! 60: #endif ! 61: #else ! 62: #include <sys/file.h> ! 63: #include <a.out.h> ! 64: #endif ! 65: ! 66: #define Fopen(s,m) (Currline = 0,file_pos=0,fopen(s,m)) ! 67: #define Ftell(f) file_pos ! 68: #define Fseek(f,off) (file_pos=off,fseek(f,off,0)) ! 69: #define Getc(f) (++file_pos, getc(f)) ! 70: #define Ungetc(c,f) (--file_pos, ungetc(c,f)) ! 71: ! 72: #define MBIT CBREAK ! 73: #if !COHERENT ! 74: #define stty(fd,argp) ioctl(fd,TIOCSETN,argp) ! 75: #else ! 76: #define LONG_MAX MAXLONG ! 77: #define L_SET 0 ! 78: #define _PATH_VI "/usr/bin/vi" ! 79: #define CMAGIC 0x1F9D /* compress format magic # */ ! 80: #endif ! 81: ! 82: #define TBUFSIZ 1024 ! 83: #define LINSIZ 256 ! 84: #define ctrl(letter) (letter & 077) ! 85: #define RUBOUT '\177' ! 86: #define ESC '\033' ! 87: #define QUIT '\034' ! 88: #define NOSEQ 0 /* no special character sequence */ ! 89: #define ITALIC 1 /* found "_ \b character" sequence */ ! 90: #define BOLD 2 /* found "char \b char" sequence */ ! 91: ! 92: struct sgttyb otty, savetty; ! 93: long file_pos, file_size; ! 94: int fnum, no_intty, no_tty, slow_tty; ! 95: int dum_opt, dlines, onquit(), end_it(), chgwinsz(); ! 96: int onsusp(); ! 97: int nscroll = 11; /* Number of lines scrolled by 'd' */ ! 98: int fold_opt = 1; /* Fold long lines */ ! 99: int stop_opt = 1; /* Stop after form feeds */ ! 100: int ssp_opt = 0; /* Suppress white space */ ! 101: int ul_opt = 1; /* Underline as best we can */ ! 102: int promptlen; ! 103: int Currline; /* Line we are currently at */ ! 104: int startup = 1; ! 105: int firstf = 1; ! 106: int notell = 1; ! 107: int docrterase = 0; ! 108: int docrtkill = 0; ! 109: int bad_so; /* True if overwriting does not turn off standout */ ! 110: int inwait, Pause, errors; ! 111: int within; /* true if we are within a file, ! 112: false if we are between files */ ! 113: int hard, dumb, noscroll, hardtabs, clreol, eatnl; ! 114: int catch_susp; /* We should catch the SIGTSTP signal */ ! 115: char **fnames; /* The list of file names */ ! 116: int nfiles; /* Number of files left to process */ ! 117: char *shell; /* The name of the shell to use */ ! 118: int shellp; /* A previous shell command exists */ ! 119: char ch; ! 120: jmp_buf restore; ! 121: char Line[LINSIZ]; /* Line buffer */ ! 122: int Lpp = 24; /* lines per page */ ! 123: char *Clear; /* clear screen */ ! 124: char *eraseln; /* erase line */ ! 125: char *Senter, *Sexit;/* enter and exit standout mode */ ! 126: char *ULenter, *ULexit; /* enter and exit underline mode */ ! 127: char *chUL; /* underline character */ ! 128: char *chBS; /* backspace character */ ! 129: char *Home; /* go to home */ ! 130: char *cursorm; /* cursor movement */ ! 131: char cursorhome[40]; /* contains cursor movement to home */ ! 132: char *EodClr; /* clear rest of screen */ ! 133: char *tgetstr(); ! 134: int Mcol = 80; /* number of columns */ ! 135: int Wrap = 1; /* set if automargins */ ! 136: int soglitch; /* terminal has standout mode glitch */ ! 137: int ulglitch; /* terminal has underline mode glitch */ ! 138: int pstate = NOSEQ; /* current UL state */ ! 139: char *editor; /* editor of choice */ ! 140: /* long fseek(); */ ! 141: extern int fseek(); ! 142: char *getenv(); ! 143: struct { ! 144: long chrctr, line; ! 145: } context, screen_start; ! 146: extern char PC; /* pad character */ ! 147: extern short ospeed; ! 148: ! 149: ! 150: main(argc, argv) ! 151: int argc; ! 152: char *argv[]; ! 153: { ! 154: register FILE *f; ! 155: register char *s; ! 156: register char *p; ! 157: register char ch; ! 158: register int left; ! 159: int prnames = 0; ! 160: int initopt = 0; ! 161: int srchopt = 0; ! 162: int clearit = 0; ! 163: int initline; ! 164: char initbuf[80]; ! 165: FILE *checkf(); ! 166: ! 167: nfiles = argc; ! 168: fnames = argv; ! 169: initterm (); ! 170: nscroll = Lpp/2 - 1; ! 171: if (nscroll <= 0) ! 172: nscroll = 1; ! 173: if(s = getenv("MORE")) argscan(s); ! 174: while (--nfiles > 0) { ! 175: if ((ch = (*++fnames)[0]) == '-') { ! 176: argscan(*fnames+1); ! 177: } ! 178: else if (ch == '+') { ! 179: s = *fnames; ! 180: if (*++s == '/') { ! 181: srchopt++; ! 182: for (++s, p = initbuf; p < initbuf + 79 && *s != '\0';) ! 183: *p++ = *s++; ! 184: *p = '\0'; ! 185: } ! 186: else { ! 187: initopt++; ! 188: for (initline = 0; *s != '\0'; s++) ! 189: if (isdigit (*s)) ! 190: initline = initline*10 + *s -'0'; ! 191: --initline; ! 192: } ! 193: } ! 194: else break; ! 195: } ! 196: /* allow clreol only if Home and eraseln and EodClr strings are ! 197: * defined, and in that case, make sure we are in noscroll mode ! 198: */ ! 199: if(clreol) ! 200: { ! 201: if((Home == NULL) || (*Home == '\0') || ! 202: (eraseln == NULL) || (*eraseln == '\0') || ! 203: (EodClr == NULL) || (*EodClr == '\0') ) ! 204: clreol = 0; ! 205: else noscroll = 1; ! 206: } ! 207: if (dlines == 0) ! 208: dlines = Lpp - (noscroll ? 1 : 2); ! 209: left = dlines; ! 210: if (nfiles > 1) ! 211: prnames++; ! 212: if (!no_intty && nfiles == 0) { ! 213: char *rindex(); ! 214: ! 215: p = rindex(argv[0], '/'); ! 216: fputs("usage: ",stderr); ! 217: fputs(p ? p + 1 : argv[0],stderr); ! 218: fputs(" [-dfln] [+linenum | +/pattern] name1 name2 ...\n",stderr); ! 219: exit(1); ! 220: } ! 221: else ! 222: f = stdin; ! 223: if (!no_tty) { ! 224: signal(SIGQUIT, onquit); ! 225: signal(SIGINT, end_it); ! 226: #if !COHERENT ! 227: signal(SIGWINCH, chgwinsz); ! 228: if (signal (SIGTSTP, SIG_IGN) == SIG_DFL) { ! 229: signal(SIGTSTP, onsusp); ! 230: catch_susp++; ! 231: } ! 232: #endif ! 233: stty (fileno(stderr), &otty); ! 234: } ! 235: if (no_intty) { ! 236: if (no_tty) ! 237: copy_file (stdin); ! 238: else { ! 239: if ((ch = Getc (f)) == '\f') ! 240: doclear(); ! 241: else { ! 242: Ungetc (ch, f); ! 243: if (noscroll && (ch != EOF)) { ! 244: if (clreol) ! 245: home (); ! 246: else ! 247: doclear (); ! 248: } ! 249: } ! 250: if (srchopt) ! 251: { ! 252: search (initbuf, stdin, 1); ! 253: if (noscroll) ! 254: left--; ! 255: } ! 256: else if (initopt) ! 257: skiplns (initline, stdin); ! 258: screen (stdin, left); ! 259: } ! 260: no_intty = 0; ! 261: prnames++; ! 262: firstf = 0; ! 263: } ! 264: ! 265: while (fnum < nfiles) { ! 266: if ((f = checkf (fnames[fnum], &clearit)) != NULL) { ! 267: context.line = context.chrctr = 0; ! 268: Currline = 0; ! 269: if (firstf) setjmp (restore); ! 270: if (firstf) { ! 271: firstf = 0; ! 272: if (srchopt) ! 273: { ! 274: search (initbuf, f, 1); ! 275: if (noscroll) ! 276: left--; ! 277: } ! 278: else if (initopt) ! 279: skiplns (initline, f); ! 280: } ! 281: else if (fnum < nfiles && !no_tty) { ! 282: setjmp (restore); ! 283: left = command (fnames[fnum], f); ! 284: } ! 285: if (left != 0) { ! 286: if ((noscroll || clearit) && (file_size != LONG_MAX)) ! 287: if (clreol) ! 288: home (); ! 289: else ! 290: doclear (); ! 291: if (prnames) { ! 292: if (bad_so) ! 293: erase (0); ! 294: if (clreol) ! 295: cleareol (); ! 296: pr("::::::::::::::"); ! 297: if (promptlen > 14) ! 298: erase (14); ! 299: printf ("\n"); ! 300: if(clreol) cleareol(); ! 301: printf("%s\n", fnames[fnum]); ! 302: if(clreol) cleareol(); ! 303: printf("::::::::::::::\n"); ! 304: if (left > Lpp - 4) ! 305: left = Lpp - 4; ! 306: } ! 307: if (no_tty) ! 308: copy_file (f); ! 309: else { ! 310: within++; ! 311: screen(f, left); ! 312: within = 0; ! 313: } ! 314: } ! 315: setjmp (restore); ! 316: fflush(stdout); ! 317: fclose(f); ! 318: screen_start.line = screen_start.chrctr = 0L; ! 319: context.line = context.chrctr = 0L; ! 320: } ! 321: fnum++; ! 322: firstf = 0; ! 323: } ! 324: reset_tty (); ! 325: exit(0); ! 326: } ! 327: ! 328: argscan(s) ! 329: char *s; ! 330: { ! 331: int seen_num = 0; ! 332: ! 333: while (*s != '\0') { ! 334: switch (*s) { ! 335: case '0': case '1': case '2': ! 336: case '3': case '4': case '5': ! 337: case '6': case '7': case '8': ! 338: case '9': ! 339: if (!seen_num) { ! 340: dlines = 0; ! 341: seen_num = 1; ! 342: } ! 343: dlines = dlines*10 + *s - '0'; ! 344: break; ! 345: case 'd': ! 346: dum_opt = 1; ! 347: break; ! 348: case 'l': ! 349: stop_opt = 0; ! 350: break; ! 351: case 'f': ! 352: fold_opt = 0; ! 353: break; ! 354: case 'p': ! 355: noscroll++; ! 356: break; ! 357: case 'c': ! 358: clreol++; ! 359: break; ! 360: case 's': ! 361: ssp_opt = 1; ! 362: break; ! 363: case 'u': ! 364: ul_opt = 0; ! 365: break; ! 366: } ! 367: s++; ! 368: } ! 369: } ! 370: ! 371: ! 372: /* ! 373: ** Check whether the file named by fs is an ASCII file which the user may ! 374: ** access. If it is, return the opened file. Otherwise return NULL. ! 375: */ ! 376: ! 377: FILE * ! 378: checkf (fs, clearfirst) ! 379: register char *fs; ! 380: int *clearfirst; ! 381: { ! 382: struct stat stbuf; ! 383: register FILE *f; ! 384: char c; ! 385: ! 386: if (stat (fs, &stbuf) == -1) { ! 387: (void)fflush(stdout); ! 388: if (clreol) ! 389: cleareol (); ! 390: printf("%s: File not found.\n", fs); ! 391: return((FILE *)NULL); ! 392: } ! 393: if ((stbuf.st_mode & S_IFMT) == S_IFDIR) { ! 394: printf("\n*** %s: directory ***\n\n", fs); ! 395: return((FILE *)NULL); ! 396: } ! 397: if ((f = Fopen(fs, "r")) == NULL) { ! 398: (void)fflush(stdout); ! 399: printf("%s: Cannot open file.\n", fs); ! 400: return((FILE *)NULL); ! 401: } ! 402: if (magic(f, fs)) ! 403: return((FILE *)NULL); ! 404: c = Getc(f); ! 405: *clearfirst = c == '\f'; ! 406: Ungetc (c, f); ! 407: if ((file_size = stbuf.st_size) == 0) ! 408: file_size = LONG_MAX; ! 409: return(f); ! 410: } ! 411: ! 412: /* ! 413: * magic -- ! 414: * check for file magic numbers. This code would best be shared with ! 415: * the file(1) program or, perhaps, more should not try and be so smart? ! 416: */ ! 417: static ! 418: magic(f, fs) ! 419: FILE *f; ! 420: char *fs; ! 421: { ! 422: #if !COHERENT ! 423: struct exec ex; ! 424: #else ! 425: struct ldheader ex; ! 426: #define a_magic l_magic ! 427: #endif ! 428: ! 429: if (fread(&ex, sizeof(ex), 1, f) == 1) { ! 430: #if COHERENT ! 431: canint(ex.a_magic); ! 432: #endif ! 433: switch(ex.a_magic) { ! 434: #if COHERENT ! 435: case L_MAGIC: ! 436: case CMAGIC: ! 437: #else ! 438: case OMAGIC: ! 439: case NMAGIC: ! 440: case ZMAGIC: ! 441: case 0405: ! 442: case 0411: ! 443: case 0177545: ! 444: #endif ! 445: printf("\n******** %s: Not a text file ********\n\n", fs); ! 446: (void)fclose(f); ! 447: return(1); ! 448: } ! 449: } ! 450: (void)fseek(f, 0L, L_SET); /* rewind() not necessary */ ! 451: return(0); ! 452: } ! 453: ! 454: /* ! 455: ** A real function, for the tputs routine in termlib ! 456: */ ! 457: ! 458: putch (ch) ! 459: char ch; ! 460: { ! 461: putchar (ch); ! 462: } ! 463: ! 464: /* ! 465: ** Print out the contents of the file f, one screenful at a time. ! 466: */ ! 467: ! 468: #define STOP -10 ! 469: ! 470: screen (f, num_lines) ! 471: register FILE *f; ! 472: register int num_lines; ! 473: { ! 474: register int c; ! 475: register int nchars; ! 476: int length; /* length of current line */ ! 477: static int prev_len = 1; /* length of previous line */ ! 478: ! 479: for (;;) { ! 480: while (num_lines > 0 && !Pause) { ! 481: if ((nchars = getline (f, &length)) == EOF) ! 482: { ! 483: if (clreol) ! 484: clreos(); ! 485: return; ! 486: } ! 487: if (ssp_opt && length == 0 && prev_len == 0) ! 488: continue; ! 489: prev_len = length; ! 490: if (bad_so || (Senter && *Senter == ' ') && promptlen > 0) ! 491: erase (0); ! 492: /* must clear before drawing line since tabs on some terminals ! 493: * do not erase what they tab over. ! 494: */ ! 495: if (clreol) ! 496: cleareol (); ! 497: prbuf (Line, length); ! 498: if (nchars < promptlen) ! 499: erase (nchars); /* erase () sets promptlen to 0 */ ! 500: else promptlen = 0; ! 501: /* is this needed? ! 502: * if (clreol) ! 503: * cleareol(); ! 504: */ ! 505: if (nchars < Mcol || !fold_opt) ! 506: prbuf("\n", 1); /* will turn off UL if necessary */ ! 507: if (nchars == STOP) ! 508: break; ! 509: num_lines--; ! 510: } ! 511: if (pstate) { ! 512: tputs(ULexit, 1, putch); ! 513: pstate = 0; ! 514: } ! 515: fflush(stdout); ! 516: if ((c = Getc(f)) == EOF) ! 517: { ! 518: if (clreol) ! 519: clreos (); ! 520: return; ! 521: } ! 522: ! 523: if (Pause && clreol) ! 524: clreos (); ! 525: Ungetc (c, f); ! 526: setjmp (restore); ! 527: Pause = 0; startup = 0; ! 528: if ((num_lines = command (NULL, f)) == 0) ! 529: return; ! 530: if (hard && promptlen > 0) ! 531: erase (0); ! 532: if (noscroll && num_lines >= dlines) ! 533: { ! 534: if (clreol) ! 535: home(); ! 536: else ! 537: doclear (); ! 538: } ! 539: screen_start.line = Currline; ! 540: screen_start.chrctr = Ftell (f); ! 541: } ! 542: } ! 543: ! 544: /* ! 545: ** Come here if a quit signal is received ! 546: */ ! 547: ! 548: onquit() ! 549: { ! 550: signal(SIGQUIT, SIG_IGN); ! 551: if (!inwait) { ! 552: putchar ('\n'); ! 553: if (!startup) { ! 554: signal(SIGQUIT, onquit); ! 555: longjmp (restore, 1); ! 556: } ! 557: else ! 558: Pause++; ! 559: } ! 560: else if (!dum_opt && notell) { ! 561: write (2, "[Use q or Q to quit]", 20); ! 562: promptlen += 20; ! 563: notell = 0; ! 564: } ! 565: signal(SIGQUIT, onquit); ! 566: } ! 567: ! 568: /* ! 569: ** Come here if a signal for a window size change is received ! 570: */ ! 571: #if !COHERENT ! 572: chgwinsz() ! 573: { ! 574: struct winsize win; ! 575: ! 576: (void) signal(SIGWINCH, SIG_IGN); ! 577: if (ioctl(fileno(stdout), TIOCGWINSZ, &win) != -1) { ! 578: if (win.ws_row != 0) { ! 579: Lpp = win.ws_row; ! 580: nscroll = Lpp/2 - 1; ! 581: if (nscroll <= 0) ! 582: nscroll = 1; ! 583: dlines = Lpp - (noscroll ? 1 : 2); ! 584: } ! 585: if (win.ws_col != 0) ! 586: Mcol = win.ws_col; ! 587: } ! 588: (void) signal(SIGWINCH, chgwinsz); ! 589: } ! 590: #endif ! 591: ! 592: /* ! 593: ** Clean up terminal state and exit. Also come here if interrupt signal received ! 594: */ ! 595: ! 596: end_it () ! 597: { ! 598: ! 599: reset_tty (); ! 600: if (clreol) { ! 601: putchar ('\r'); ! 602: clreos (); ! 603: fflush (stdout); ! 604: } ! 605: else if (!clreol && (promptlen > 0)) { ! 606: kill_line (); ! 607: fflush (stdout); ! 608: } ! 609: else ! 610: write (2, "\n", 1); ! 611: _exit(0); ! 612: } ! 613: ! 614: copy_file(f) ! 615: register FILE *f; ! 616: { ! 617: register int c; ! 618: ! 619: while ((c = getc(f)) != EOF) ! 620: putchar(c); ! 621: } ! 622: ! 623: /* Simplified printf function */ ! 624: ! 625: printf (fmt, va_alist) ! 626: register char *fmt; ! 627: va_dcl ! 628: { ! 629: va_list ap; ! 630: register char ch; ! 631: register int ccount; ! 632: ! 633: ccount = 0; ! 634: va_start(ap); ! 635: while (*fmt) { ! 636: while ((ch = *fmt++) != '%') { ! 637: if (ch == '\0') ! 638: return (ccount); ! 639: ccount++; ! 640: putchar (ch); ! 641: } ! 642: switch (*fmt++) { ! 643: case 'd': ! 644: ccount += printd (va_arg(ap, int)); ! 645: break; ! 646: case 's': ! 647: ccount += pr (va_arg(ap, char *)); ! 648: break; ! 649: case '%': ! 650: ccount++; ! 651: putchar ('%'); ! 652: break; ! 653: case '0': ! 654: return (ccount); ! 655: default: ! 656: break; ! 657: } ! 658: } ! 659: va_end(ap); ! 660: return (ccount); ! 661: ! 662: } ! 663: ! 664: /* ! 665: ** Print an integer as a string of decimal digits, ! 666: ** returning the length of the print representation. ! 667: */ ! 668: ! 669: printd (n) ! 670: int n; ! 671: { ! 672: int a, nchars; ! 673: ! 674: if (a = n/10) ! 675: nchars = 1 + printd(a); ! 676: else ! 677: nchars = 1; ! 678: putchar (n % 10 + '0'); ! 679: return (nchars); ! 680: } ! 681: ! 682: /* Put the print representation of an integer into a string */ ! 683: static char *sptr; ! 684: ! 685: scanstr (n, str) ! 686: int n; ! 687: char *str; ! 688: { ! 689: sptr = str; ! 690: Sprintf (n); ! 691: *sptr = '\0'; ! 692: } ! 693: ! 694: Sprintf (n) ! 695: { ! 696: int a; ! 697: ! 698: if (a = n/10) ! 699: Sprintf (a); ! 700: *sptr++ = n % 10 + '0'; ! 701: } ! 702: ! 703: static char bell = ctrl('G'); ! 704: ! 705: strlen (s) ! 706: char *s; ! 707: { ! 708: register char *p; ! 709: ! 710: p = s; ! 711: while (*p++) ! 712: ; ! 713: return (p - s - 1); ! 714: } ! 715: ! 716: /* See whether the last component of the path name "path" is equal to the ! 717: ** string "string" ! 718: */ ! 719: ! 720: tailequ (path, string) ! 721: char *path; ! 722: register char *string; ! 723: { ! 724: register char *tail; ! 725: ! 726: tail = path + strlen(path); ! 727: while (tail >= path) ! 728: if (*(--tail) == '/') ! 729: break; ! 730: ++tail; ! 731: while (*tail++ == *string++) ! 732: if (*tail == '\0') ! 733: return(1); ! 734: return(0); ! 735: } ! 736: ! 737: prompt (filename) ! 738: char *filename; ! 739: { ! 740: if (clreol) ! 741: cleareol (); ! 742: else if (promptlen > 0) ! 743: kill_line (); ! 744: if (!hard) { ! 745: promptlen = 8; ! 746: if (Senter && Sexit) { ! 747: tputs (Senter, 1, putch); ! 748: promptlen += (2 * soglitch); ! 749: } ! 750: if (clreol) ! 751: cleareol (); ! 752: pr("--More--"); ! 753: if (filename != NULL) { ! 754: promptlen += printf ("(Next file: %s)", filename); ! 755: } ! 756: else if (!no_intty) { ! 757: promptlen += printf ("(%d%%)", (int)((file_pos * 100) / file_size)); ! 758: } ! 759: if (dum_opt) { ! 760: promptlen += pr("[Press space to continue, 'q' to quit.]"); ! 761: } ! 762: if (Senter && Sexit) ! 763: tputs (Sexit, 1, putch); ! 764: if (clreol) ! 765: clreos (); ! 766: fflush(stdout); ! 767: } ! 768: else ! 769: write (2, &bell, 1); ! 770: inwait++; ! 771: } ! 772: ! 773: /* ! 774: ** Get a logical line ! 775: */ ! 776: #ifndef _I386 ! 777: getline(f, length) ! 778: register FILE *f; ! 779: int *length; ! 780: { ! 781: register int c; ! 782: register char *p; ! 783: register int column; ! 784: static int colflg; ! 785: ! 786: p = Line; ! 787: column = 0; ! 788: c = Getc (f); ! 789: if (colflg && c == '\n') { ! 790: Currline++; ! 791: c = Getc (f); ! 792: } ! 793: while (p < &Line[LINSIZ - 1]) { ! 794: if (c == EOF) { ! 795: if (p > Line) { ! 796: *p = '\0'; ! 797: *length = p - Line; ! 798: return (column); ! 799: } ! 800: *length = p - Line; ! 801: return (EOF); ! 802: } ! 803: if (c == '\n') { ! 804: Currline++; ! 805: break; ! 806: } ! 807: *p++ = c; ! 808: if (c == '\t') ! 809: if (!hardtabs || column < promptlen && !hard) { ! 810: if (hardtabs && eraseln && !dumb) { ! 811: column = 1 + (column | 7); ! 812: tputs (eraseln, 1, putch); ! 813: promptlen = 0; ! 814: } ! 815: else { ! 816: for (--p; p < &Line[LINSIZ - 1];) { ! 817: *p++ = ' '; ! 818: if ((++column & 7) == 0) ! 819: break; ! 820: } ! 821: if (column >= promptlen) promptlen = 0; ! 822: } ! 823: } ! 824: else ! 825: column = 1 + (column | 7); ! 826: else if (c == '\b' && column > 0) ! 827: column--; ! 828: else if (c == '\r') ! 829: column = 0; ! 830: else if (c == '\f' && stop_opt) { ! 831: p[-1] = '^'; ! 832: *p++ = 'L'; ! 833: column += 2; ! 834: Pause++; ! 835: } ! 836: else if (c == EOF) { ! 837: *length = p - Line; ! 838: return (column); ! 839: } ! 840: else if (c >= ' ' && c != RUBOUT) ! 841: column++; ! 842: if (column >= Mcol && fold_opt) break; ! 843: c = Getc (f); ! 844: } ! 845: if (column >= Mcol && Mcol > 0) { ! 846: if (!Wrap) { ! 847: *p++ = '\n'; ! 848: } ! 849: } ! 850: colflg = column == Mcol && fold_opt; ! 851: if (colflg && eatnl && Wrap) { ! 852: *p++ = '\n'; /* simulate normal wrap */ ! 853: } ! 854: *length = p - Line; ! 855: *p = 0; ! 856: return (column); ! 857: } ! 858: #endif _I386 ! 859: /* ! 860: ** Erase the rest of the prompt, assuming we are starting at column col. ! 861: */ ! 862: ! 863: erase (col) ! 864: register int col; ! 865: { ! 866: ! 867: if (promptlen == 0) ! 868: return; ! 869: if (hard) { ! 870: putchar ('\n'); ! 871: } ! 872: else { ! 873: if (col == 0) ! 874: putchar ('\r'); ! 875: if (!dumb && eraseln) ! 876: tputs (eraseln, 1, putch); ! 877: else ! 878: for (col = promptlen - col; col > 0; col--) ! 879: putchar (' '); ! 880: } ! 881: promptlen = 0; ! 882: } ! 883: ! 884: /* ! 885: ** Erase the current line entirely ! 886: */ ! 887: ! 888: kill_line () ! 889: { ! 890: erase (0); ! 891: if (!eraseln || dumb) putchar ('\r'); ! 892: } ! 893: ! 894: /* ! 895: * force clear to end of line ! 896: */ ! 897: cleareol() ! 898: { ! 899: tputs(eraseln, 1, putch); ! 900: } ! 901: ! 902: clreos() ! 903: { ! 904: tputs(EodClr, 1, putch); ! 905: } ! 906: ! 907: /* ! 908: ** Print string and return number of characters ! 909: */ ! 910: ! 911: pr(s1) ! 912: char *s1; ! 913: { ! 914: register char *s; ! 915: register char c; ! 916: ! 917: for (s = s1; c = *s++; ) ! 918: putchar(c); ! 919: return (s - s1 - 1); ! 920: } ! 921: ! 922: /* ! 923: * Check for special character sequences and return which type was found. ! 924: * Currently understands italics via "_\b" followed by a character, ! 925: * and bold via character "\b" character. Return NOSEQ if no sequence found, ! 926: * ITALIC for italics and BOLD for bold. ! 927: */ ! 928: checkit(s, n) ! 929: register char *s; ! 930: register int n; ! 931: { ! 932: if (n < 2 || s[1] != '\b') ! 933: return NOSEQ; ! 934: if (s[0] == '_' || s[2] == '_') ! 935: return ITALIC; ! 936: if (s[0] == s[2]) ! 937: return BOLD; ! 938: return NOSEQ; ! 939: } ! 940: /* ! 941: * Print a buffer of n characters ! 942: */ ! 943: prbuf(s, n) ! 944: register char *s; ! 945: register int n; ! 946: { ! 947: register char c; /* next output character */ ! 948: register int state = NOSEQ; /* next output char's state */ ! 949: ! 950: while (--n >= 0) ! 951: if (!ul_opt) ! 952: putchar (*s++); ! 953: else { ! 954: if (*s == ' ' && pstate==NOSEQ && ulglitch && checkit(s+1,n-1)) { ! 955: s++; ! 956: continue; ! 957: } ! 958: if ((state = checkit(s, n)) != NOSEQ) { ! 959: c = (*s == '_')? s[2] : *s ; ! 960: n -= 2; ! 961: s += 3; ! 962: } else ! 963: c = *s++; ! 964: if (state != pstate) { ! 965: if (pstate == ITALIC) ! 966: tputs(ULexit, 1, putch); ! 967: else if (pstate == BOLD && Senter && Sexit) ! 968: tputs(Sexit, 1, putch); ! 969: if (c == ' ' && state == NOSEQ && ulglitch && checkit(s,n-1)) ! 970: state = checkit(s, n-1); ! 971: if (state == ITALIC) ! 972: tputs(ULenter, 1, putch); ! 973: else if (state == BOLD && Senter && Sexit) ! 974: tputs(Senter, 1, putch); ! 975: } ! 976: if (c != ' ' || pstate == NOSEQ || state != NOSEQ || !ulglitch) ! 977: putchar(c); ! 978: if (state == ITALIC && *chUL) { ! 979: pr(chBS); ! 980: tputs(chUL, 1, putch); ! 981: } ! 982: pstate = state; ! 983: } ! 984: if (state != NOSEQ) { ! 985: if (state == ITALIC) ! 986: tputs(ULexit, 1, putch); ! 987: else if (state == BOLD && Senter && Sexit) ! 988: tputs(Sexit, 1, putch); ! 989: pstate = NOSEQ; ! 990: } ! 991: ! 992: } ! 993: ! 994: /* ! 995: ** Clear the screen ! 996: */ ! 997: ! 998: doclear() ! 999: { ! 1000: if (Clear && !hard) { ! 1001: tputs(Clear, 1, putch); ! 1002: ! 1003: /* Put out carriage return so that system doesn't ! 1004: ** get confused by escape sequences when expanding tabs ! 1005: */ ! 1006: putchar ('\r'); ! 1007: promptlen = 0; ! 1008: } ! 1009: } ! 1010: ! 1011: /* ! 1012: * Go to home position ! 1013: */ ! 1014: home() ! 1015: { ! 1016: tputs(Home,1,putch); ! 1017: } ! 1018: ! 1019: static int lastcmd, lastarg, lastp; ! 1020: static int lastcolon; ! 1021: char shell_line[132]; ! 1022: ! 1023: /* ! 1024: ** Read a command and do it. A command consists of an optional integer ! 1025: ** argument followed by the command character. Return the number of lines ! 1026: ** to display in the next screenful. If there is nothing more to display ! 1027: ** in the current file, zero is returned. ! 1028: */ ! 1029: ! 1030: command (filename, f) ! 1031: char *filename; ! 1032: register FILE *f; ! 1033: { ! 1034: register int nlines; ! 1035: register int retval; ! 1036: register char c; ! 1037: char colonch; ! 1038: FILE *helpf; ! 1039: int done; ! 1040: char comchar, cmdbuf[80], *p; ! 1041: ! 1042: #define ret(val) retval=val;done++;break ! 1043: ! 1044: done = 0; ! 1045: if (!errors) ! 1046: prompt (filename); ! 1047: else ! 1048: errors = 0; ! 1049: if (MBIT == RAW && slow_tty) { ! 1050: otty.sg_flags |= MBIT; ! 1051: stty(fileno(stderr), &otty); ! 1052: } ! 1053: for (;;) { ! 1054: nlines = number (&comchar); ! 1055: lastp = colonch = 0; ! 1056: if (comchar == '.') { /* Repeat last command */ ! 1057: lastp++; ! 1058: comchar = lastcmd; ! 1059: nlines = lastarg; ! 1060: if (lastcmd == ':') ! 1061: colonch = lastcolon; ! 1062: } ! 1063: lastcmd = comchar; ! 1064: lastarg = nlines; ! 1065: if (comchar == otty.sg_erase) { ! 1066: kill_line (); ! 1067: prompt (filename); ! 1068: continue; ! 1069: } ! 1070: switch (comchar) { ! 1071: case ':': ! 1072: retval = colon (filename, colonch, nlines); ! 1073: if (retval >= 0) ! 1074: done++; ! 1075: break; ! 1076: case 'b': ! 1077: case ctrl('B'): ! 1078: { ! 1079: register int initline; ! 1080: ! 1081: if (no_intty) { ! 1082: write(2, &bell, 1); ! 1083: return (-1); ! 1084: } ! 1085: ! 1086: if (nlines == 0) nlines++; ! 1087: ! 1088: putchar ('\r'); ! 1089: erase (0); ! 1090: printf ("\n"); ! 1091: if (clreol) ! 1092: cleareol (); ! 1093: printf ("...back %d page", nlines); ! 1094: if (nlines > 1) ! 1095: pr ("s\n"); ! 1096: else ! 1097: pr ("\n"); ! 1098: ! 1099: if (clreol) ! 1100: cleareol (); ! 1101: pr ("\n"); ! 1102: ! 1103: initline = Currline - dlines * (nlines + 1); ! 1104: if (! noscroll) ! 1105: --initline; ! 1106: if (initline < 0) initline = 0; ! 1107: Fseek(f, 0L); ! 1108: Currline = 0; /* skiplns() will make Currline correct */ ! 1109: skiplns(initline, f); ! 1110: if (! noscroll) { ! 1111: ret(dlines + 1); ! 1112: } ! 1113: else { ! 1114: ret(dlines); ! 1115: } ! 1116: } ! 1117: case ' ': ! 1118: case 'z': ! 1119: if (nlines == 0) nlines = dlines; ! 1120: else if (comchar == 'z') dlines = nlines; ! 1121: ret (nlines); ! 1122: case 'd': ! 1123: case ctrl('D'): ! 1124: if (nlines != 0) nscroll = nlines; ! 1125: ret (nscroll); ! 1126: case 'q': ! 1127: case 'Q': ! 1128: end_it (); ! 1129: case 's': ! 1130: case 'f': ! 1131: if (nlines == 0) nlines++; ! 1132: if (comchar == 'f') ! 1133: nlines *= dlines; ! 1134: putchar ('\r'); ! 1135: erase (0); ! 1136: printf ("\n"); ! 1137: if (clreol) ! 1138: cleareol (); ! 1139: printf ("...skipping %d line", nlines); ! 1140: if (nlines > 1) ! 1141: pr ("s\n"); ! 1142: else ! 1143: pr ("\n"); ! 1144: ! 1145: if (clreol) ! 1146: cleareol (); ! 1147: pr ("\n"); ! 1148: ! 1149: while (nlines > 0) { ! 1150: while ((c = Getc (f)) != '\n') ! 1151: if (c == EOF) { ! 1152: retval = 0; ! 1153: done++; ! 1154: goto endsw; ! 1155: } ! 1156: Currline++; ! 1157: nlines--; ! 1158: } ! 1159: ret (dlines); ! 1160: case '\n': ! 1161: if (nlines != 0) ! 1162: dlines = nlines; ! 1163: else ! 1164: nlines = 1; ! 1165: ret (nlines); ! 1166: case '\f': ! 1167: if (!no_intty) { ! 1168: doclear (); ! 1169: Fseek (f, screen_start.chrctr); ! 1170: Currline = screen_start.line; ! 1171: ret (dlines); ! 1172: } ! 1173: else { ! 1174: write (2, &bell, 1); ! 1175: break; ! 1176: } ! 1177: case '\'': ! 1178: if (!no_intty) { ! 1179: kill_line (); ! 1180: pr ("\n***Back***\n\n"); ! 1181: Fseek (f, context.chrctr); ! 1182: Currline = context.line; ! 1183: ret (dlines); ! 1184: } ! 1185: else { ! 1186: write (2, &bell, 1); ! 1187: break; ! 1188: } ! 1189: case '=': ! 1190: kill_line (); ! 1191: promptlen = printd (Currline); ! 1192: fflush (stdout); ! 1193: break; ! 1194: case 'n': ! 1195: lastp++; ! 1196: case '/': ! 1197: if (nlines == 0) nlines++; ! 1198: kill_line (); ! 1199: pr ("/"); ! 1200: promptlen = 1; ! 1201: fflush (stdout); ! 1202: if (lastp) { ! 1203: write (2,"\r", 1); ! 1204: search (NULL, f, nlines); /* Use previous r.e. */ ! 1205: } ! 1206: else { ! 1207: ttyin (cmdbuf, 78, '/'); ! 1208: write (2, "\r", 1); ! 1209: search (cmdbuf, f, nlines); ! 1210: } ! 1211: ret (dlines-1); ! 1212: case '!': ! 1213: do_shell (filename); ! 1214: break; ! 1215: case '?': ! 1216: case 'h': ! 1217: if ((helpf = fopen (HELPFILE, "r")) == NULL) ! 1218: error ("Can't open help file"); ! 1219: if (noscroll) doclear (); ! 1220: copy_file (helpf); ! 1221: fclose (helpf); ! 1222: prompt (filename); ! 1223: break; ! 1224: case 'v': /* This case should go right before default */ ! 1225: if (!no_intty) { ! 1226: kill_line (); ! 1227: if ((editor = getenv("VISUAL")) == NULL) ! 1228: editor = getenv("EDITOR"); ! 1229: if (editor != NULL && !tailequ(editor, "vi")) { ! 1230: pr(editor); putchar(' '); pr(fnames[fnum]); ! 1231: execute(filename, editor, editor, fnames[fnum], NULL); ! 1232: } else { ! 1233: cmdbuf[0] = '+'; ! 1234: scanstr (Currline - dlines < 0 ? 1 ! 1235: : Currline - (dlines + 1) / 2, &cmdbuf[1]); ! 1236: pr("vi "); pr(cmdbuf); putchar(' '); pr(fnames[fnum]); ! 1237: execute(filename,_PATH_VI,"vi",cmdbuf,fnames[fnum],NULL); ! 1238: } ! 1239: break; ! 1240: } ! 1241: default: ! 1242: if (dum_opt) { ! 1243: kill_line (); ! 1244: if (Senter && Sexit) { ! 1245: tputs (Senter, 1, putch); ! 1246: promptlen = pr ("[Press 'h' for instructions.]") + (2 * soglitch); ! 1247: tputs (Sexit, 1, putch); ! 1248: } ! 1249: else ! 1250: promptlen = pr ("[Press 'h' for instructions.]"); ! 1251: fflush (stdout); ! 1252: } ! 1253: else ! 1254: write (2, &bell, 1); ! 1255: break; ! 1256: } ! 1257: if (done) break; ! 1258: } ! 1259: putchar ('\r'); ! 1260: endsw: ! 1261: inwait = 0; ! 1262: notell++; ! 1263: if (MBIT == RAW && slow_tty) { ! 1264: otty.sg_flags &= ~MBIT; ! 1265: stty(fileno(stderr), &otty); ! 1266: } ! 1267: return (retval); ! 1268: } ! 1269: ! 1270: char ch; ! 1271: ! 1272: /* ! 1273: * Execute a colon-prefixed command. ! 1274: * Returns <0 if not a command that should cause ! 1275: * more of the file to be printed. ! 1276: */ ! 1277: ! 1278: colon (filename, cmd, nlines) ! 1279: char *filename; ! 1280: int cmd; ! 1281: int nlines; ! 1282: { ! 1283: if (cmd == 0) ! 1284: ch = readch (); ! 1285: else ! 1286: ch = cmd; ! 1287: lastcolon = ch; ! 1288: switch (ch) { ! 1289: case 'f': ! 1290: kill_line (); ! 1291: if (!no_intty) ! 1292: promptlen = printf ("\"%s\" line %d", fnames[fnum], Currline); ! 1293: else ! 1294: promptlen = printf ("[Not a file] line %d", Currline); ! 1295: fflush (stdout); ! 1296: return (-1); ! 1297: case 'n': ! 1298: if (nlines == 0) { ! 1299: if (fnum >= nfiles - 1) ! 1300: end_it (); ! 1301: nlines++; ! 1302: } ! 1303: putchar ('\r'); ! 1304: erase (0); ! 1305: skipf (nlines); ! 1306: return (0); ! 1307: case 'p': ! 1308: if (no_intty) { ! 1309: write (2, &bell, 1); ! 1310: return (-1); ! 1311: } ! 1312: putchar ('\r'); ! 1313: erase (0); ! 1314: if (nlines == 0) ! 1315: nlines++; ! 1316: skipf (-nlines); ! 1317: return (0); ! 1318: case '!': ! 1319: do_shell (filename); ! 1320: return (-1); ! 1321: case 'q': ! 1322: case 'Q': ! 1323: end_it (); ! 1324: default: ! 1325: write (2, &bell, 1); ! 1326: return (-1); ! 1327: } ! 1328: } ! 1329: ! 1330: /* ! 1331: ** Read a decimal number from the terminal. Set cmd to the non-digit which ! 1332: ** terminates the number. ! 1333: */ ! 1334: ! 1335: number(cmd) ! 1336: char *cmd; ! 1337: { ! 1338: register int i; ! 1339: ! 1340: i = 0; ch = otty.sg_kill; ! 1341: for (;;) { ! 1342: ch = readch (); ! 1343: if (ch >= '0' && ch <= '9') ! 1344: i = i*10 + ch - '0'; ! 1345: else if (ch == otty.sg_kill) ! 1346: i = 0; ! 1347: else { ! 1348: *cmd = ch; ! 1349: break; ! 1350: } ! 1351: } ! 1352: return (i); ! 1353: } ! 1354: ! 1355: do_shell (filename) ! 1356: char *filename; ! 1357: { ! 1358: char cmdbuf[80]; ! 1359: ! 1360: kill_line (); ! 1361: pr ("!"); ! 1362: fflush (stdout); ! 1363: promptlen = 1; ! 1364: if (lastp) ! 1365: pr (shell_line); ! 1366: else { ! 1367: ttyin (cmdbuf, 78, '!'); ! 1368: if (expand (shell_line, cmdbuf)) { ! 1369: kill_line (); ! 1370: promptlen = printf ("!%s", shell_line); ! 1371: } ! 1372: } ! 1373: fflush (stdout); ! 1374: write (2, "\n", 1); ! 1375: promptlen = 0; ! 1376: shellp = 1; ! 1377: execute (filename, shell, shell, "-c", shell_line, 0); ! 1378: } ! 1379: ! 1380: /* ! 1381: ** Search for nth ocurrence of regular expression contained in buf in the file ! 1382: */ ! 1383: search (buf, file, n) ! 1384: char buf[]; ! 1385: FILE *file; ! 1386: register int n; ! 1387: { ! 1388: long startline = Ftell (file); ! 1389: register long line1 = startline; ! 1390: register long line2 = startline; ! 1391: register long line3 = startline; ! 1392: register int lncount; ! 1393: int saveln, rv; ! 1394: #if !COHERENT ! 1395: int re_exec(); ! 1396: char *re_comp(); ! 1397: #else ! 1398: static regexp *rep; ! 1399: #endif ! 1400: char *s; ! 1401: ! 1402: context.line = saveln = Currline; ! 1403: context.chrctr = startline; ! 1404: lncount = 0; ! 1405: #if !COHERENT ! 1406: if ((s = re_comp (buf)) != 0) ! 1407: error (s); ! 1408: #else ! 1409: if (buf != NULL) { ! 1410: if (rep != (regexp *)0) ! 1411: free((char *)rep); ! 1412: rep = regcomp(buf); ! 1413: } ! 1414: #endif ! 1415: while (!feof (file)) { ! 1416: line3 = line2; ! 1417: line2 = line1; ! 1418: line1 = Ftell (file); ! 1419: rdline (file); ! 1420: lncount++; ! 1421: #if !COHERENT ! 1422: if ((rv = re_exec (Line)) == 1) ! 1423: #else ! 1424: if ((rv = regexec(rep, Line)) == 1) ! 1425: #endif ! 1426: if (--n == 0) { ! 1427: if (lncount > 3 || (lncount > 1 && no_intty)) ! 1428: { ! 1429: pr ("\n"); ! 1430: if (clreol) ! 1431: cleareol (); ! 1432: pr("...skipping\n"); ! 1433: } ! 1434: if (!no_intty) { ! 1435: Currline -= (lncount >= 3 ? 3 : lncount); ! 1436: Fseek (file, line3); ! 1437: if (noscroll) ! 1438: if (clreol) { ! 1439: home (); ! 1440: cleareol (); ! 1441: } ! 1442: else ! 1443: doclear (); ! 1444: } ! 1445: else { ! 1446: kill_line (); ! 1447: if (noscroll) ! 1448: if (clreol) { ! 1449: home (); ! 1450: cleareol (); ! 1451: } ! 1452: else ! 1453: doclear (); ! 1454: pr (Line); ! 1455: putchar ('\n'); ! 1456: } ! 1457: break; ! 1458: } ! 1459: #if !COHERENT ! 1460: else if (rv == -1) ! 1461: error ("Regular expression botch"); ! 1462: #endif ! 1463: } ! 1464: if (feof (file)) { ! 1465: if (!no_intty) { ! 1466: #if COHERENT ! 1467: clearerr(file); /* a lot cleaner under COHERENT */ ! 1468: #else ! 1469: file->_flag &= ~_IOEOF; /* why doesn't fseek do this ??!!??! */ ! 1470: #endif ! 1471: Currline = saveln; ! 1472: Fseek (file, startline); ! 1473: } ! 1474: else { ! 1475: pr ("\nPattern not found\n"); ! 1476: end_it (); ! 1477: } ! 1478: error ("Pattern not found"); ! 1479: } ! 1480: ! 1481: } ! 1482: ! 1483: /* ! 1484: * error message printer for regular expression code ! 1485: */ ! 1486: #if COHERENT ! 1487: void ! 1488: regerror(msg) ! 1489: char *msg; ! 1490: { ! 1491: error(msg); ! 1492: } ! 1493: #endif ! 1494: ! 1495: /*VARARGS2*/ ! 1496: execute (filename, cmd, va_alist) ! 1497: char *filename; ! 1498: char *cmd; ! 1499: va_dcl ! 1500: { ! 1501: int id; ! 1502: int n; ! 1503: va_list argp; ! 1504: ! 1505: fflush (stdout); ! 1506: reset_tty (); ! 1507: for (n = 10; (id = fork ()) < 0 && n > 0; n--) ! 1508: sleep (5); ! 1509: if (id == 0) { ! 1510: if (!isatty(0)) { ! 1511: close(0); ! 1512: open("/dev/tty", 0); ! 1513: } ! 1514: va_start(argp); ! 1515: execv (cmd, argp); ! 1516: write (2, "exec failed\n", 12); ! 1517: exit (1); ! 1518: va_end(argp); /* balance {}'s for some UNIX's */ ! 1519: } ! 1520: if (id > 0) { ! 1521: signal (SIGINT, SIG_IGN); ! 1522: signal (SIGQUIT, SIG_IGN); ! 1523: #if !COHERENT ! 1524: if (catch_susp) ! 1525: signal(SIGTSTP, SIG_DFL); ! 1526: #endif ! 1527: while (wait(0) > 0) ! 1528: ; ! 1529: signal (SIGINT, end_it); ! 1530: signal (SIGQUIT, onquit); ! 1531: #if !COHERENT ! 1532: if (catch_susp) ! 1533: signal(SIGTSTP, onsusp); ! 1534: #endif ! 1535: } else ! 1536: write(2, "can't fork\n", 11); ! 1537: set_tty (); ! 1538: pr ("------------------------\n"); ! 1539: prompt (filename); ! 1540: } ! 1541: /* ! 1542: ** Skip n lines in the file f ! 1543: */ ! 1544: ! 1545: skiplns (n, f) ! 1546: register int n; ! 1547: register FILE *f; ! 1548: { ! 1549: register char c; ! 1550: ! 1551: while (n > 0) { ! 1552: while ((c = Getc (f)) != '\n') ! 1553: if (c == EOF) ! 1554: return; ! 1555: n--; ! 1556: Currline++; ! 1557: } ! 1558: } ! 1559: ! 1560: /* ! 1561: ** Skip nskip files in the file list (from the command line). Nskip may be ! 1562: ** negative. ! 1563: */ ! 1564: ! 1565: skipf (nskip) ! 1566: register int nskip; ! 1567: { ! 1568: if (nskip == 0) return; ! 1569: if (nskip > 0) { ! 1570: if (fnum + nskip > nfiles - 1) ! 1571: nskip = nfiles - fnum - 1; ! 1572: } ! 1573: else if (within) ! 1574: ++fnum; ! 1575: fnum += nskip; ! 1576: if (fnum < 0) ! 1577: fnum = 0; ! 1578: pr ("\n...Skipping "); ! 1579: pr ("\n"); ! 1580: if (clreol) ! 1581: cleareol (); ! 1582: pr ("...Skipping "); ! 1583: pr (nskip > 0 ? "to file " : "back to file "); ! 1584: pr (fnames[fnum]); ! 1585: pr ("\n"); ! 1586: if (clreol) ! 1587: cleareol (); ! 1588: pr ("\n"); ! 1589: --fnum; ! 1590: } ! 1591: ! 1592: /*----------------------------- Terminal I/O -------------------------------*/ ! 1593: ! 1594: initterm () ! 1595: { ! 1596: char buf[TBUFSIZ]; ! 1597: static char clearbuf[TBUFSIZ]; ! 1598: char *clearptr, *padstr; ! 1599: int ldisc; ! 1600: int lmode; ! 1601: char *term; ! 1602: int tgrp; ! 1603: #if !COHERENT ! 1604: struct winsize win; ! 1605: #endif ! 1606: ! 1607: retry: ! 1608: if (!(no_tty = gtty(fileno(stdout), &otty))) { ! 1609: #if !COHERENT ! 1610: if (ioctl(fileno(stdout), TIOCLGET, &lmode) < 0) { ! 1611: perror("TIOCLGET"); ! 1612: exit(1); ! 1613: } ! 1614: docrterase = ((lmode & LCRTERA) != 0); ! 1615: docrtkill = ((lmode & LCRTKIL) != 0); ! 1616: /* ! 1617: * Wait until we're in the foreground before we save the ! 1618: * the terminal modes. ! 1619: */ ! 1620: if (ioctl(fileno(stdout), TIOCGPGRP, &tgrp) < 0) { ! 1621: perror("TIOCGPGRP"); ! 1622: exit(1); ! 1623: } ! 1624: if (tgrp != getpgrp(0)) { ! 1625: kill(0, SIGTTOU); ! 1626: goto retry; ! 1627: } ! 1628: #else ! 1629: docrterase = 0; ! 1630: docrtkill = 0; ! 1631: #endif ! 1632: if ((term = getenv("TERM")) == 0 || tgetent(buf, term) <= 0) { ! 1633: dumb++; ul_opt = 0; ! 1634: } ! 1635: else { ! 1636: #if !COHERENT ! 1637: if (ioctl(fileno(stdout), TIOCGWINSZ, &win) < 0) { ! 1638: #endif ! 1639: Lpp = tgetnum("li"); ! 1640: Mcol = tgetnum("co"); ! 1641: #if !COHERENT ! 1642: } else { ! 1643: if ((Lpp = win.ws_row) == 0) ! 1644: Lpp = tgetnum("li"); ! 1645: if ((Mcol = win.ws_col) == 0) ! 1646: Mcol = tgetnum("co"); ! 1647: } ! 1648: #endif ! 1649: if ((Lpp <= 0) || tgetflag("hc")) { ! 1650: hard++; /* Hard copy terminal */ ! 1651: Lpp = 24; ! 1652: } ! 1653: if (tgetflag("xn")) ! 1654: eatnl++; /* Eat newline at last column + 1; dec, concept */ ! 1655: if (Mcol <= 0) ! 1656: Mcol = 80; ! 1657: ! 1658: if (tailequ (fnames[0], "page") || !hard && tgetflag("ns")) ! 1659: noscroll++; ! 1660: Wrap = tgetflag("am"); ! 1661: bad_so = tgetflag ("xs"); ! 1662: clearptr = clearbuf; ! 1663: eraseln = tgetstr("ce",&clearptr); ! 1664: Clear = tgetstr("cl", &clearptr); ! 1665: Senter = tgetstr("so", &clearptr); ! 1666: Sexit = tgetstr("se", &clearptr); ! 1667: if ((soglitch = tgetnum("sg")) < 0) ! 1668: soglitch = 0; ! 1669: ! 1670: /* ! 1671: * Set up for underlining: some terminals don't need it; ! 1672: * others have start/stop sequences, still others have an ! 1673: * underline char sequence which is assumed to move the ! 1674: * cursor forward one character. If underline sequence ! 1675: * isn't available, settle for standout sequence. ! 1676: */ ! 1677: ! 1678: if (tgetflag("ul") || tgetflag("os")) ! 1679: ul_opt = 0; ! 1680: if ((chUL = tgetstr("uc", &clearptr)) == NULL ) ! 1681: chUL = ""; ! 1682: if (((ULenter = tgetstr("us", &clearptr)) == NULL || ! 1683: (ULexit = tgetstr("ue", &clearptr)) == NULL) && !*chUL) { ! 1684: if ((ULenter = Senter) == NULL || (ULexit = Sexit) == NULL) { ! 1685: ULenter = ""; ! 1686: ULexit = ""; ! 1687: } else ! 1688: ulglitch = soglitch; ! 1689: } else { ! 1690: if ((ulglitch = tgetnum("ug")) < 0) ! 1691: ulglitch = 0; ! 1692: } ! 1693: ! 1694: if (padstr = tgetstr("pc", &clearptr)) ! 1695: PC = *padstr; ! 1696: Home = tgetstr("ho",&clearptr); ! 1697: if (Home == 0 || *Home == '\0') ! 1698: { ! 1699: if ((cursorm = tgetstr("cm", &clearptr)) != NULL) { ! 1700: strcpy(cursorhome, tgoto(cursorm, 0, 0)); ! 1701: Home = cursorhome; ! 1702: } ! 1703: } ! 1704: EodClr = tgetstr("cd", &clearptr); ! 1705: if ((chBS = tgetstr("bc", &clearptr)) == NULL) ! 1706: chBS = "\b"; ! 1707: ! 1708: } ! 1709: if ((shell = getenv("SHELL")) == NULL) ! 1710: shell = "/bin/sh"; ! 1711: } ! 1712: no_intty = gtty(fileno(stdin), &otty); ! 1713: gtty(fileno(stderr), &otty); ! 1714: savetty = otty; ! 1715: ospeed = otty.sg_ospeed; ! 1716: slow_tty = ospeed < B1200; ! 1717: #if !COHERENT ! 1718: hardtabs = (otty.sg_flags & TBDELAY) != XTABS; ! 1719: #endif ! 1720: if (!no_tty) { ! 1721: otty.sg_flags &= ~ECHO; ! 1722: if (MBIT == CBREAK || !slow_tty) ! 1723: otty.sg_flags |= MBIT; ! 1724: } ! 1725: } ! 1726: ! 1727: readch () ! 1728: { ! 1729: char ch; ! 1730: extern int errno; ! 1731: ! 1732: errno = 0; ! 1733: if (read (fileno(stdin), &ch, 1) <= 0) ! 1734: if (errno != EINTR) ! 1735: end_it(); ! 1736: else ! 1737: ch = otty.sg_kill; ! 1738: return (ch); ! 1739: } ! 1740: ! 1741: static char BS = '\b'; ! 1742: static char *BSB = "\b \b"; ! 1743: static char CARAT = '^'; ! 1744: #define ERASEONECHAR \ ! 1745: if (docrterase) \ ! 1746: write (2, BSB, sizeof(BSB)); \ ! 1747: else \ ! 1748: write (2, &BS, sizeof(BS)); ! 1749: ! 1750: ttyin (buf, nmax, pchar) ! 1751: char buf[]; ! 1752: register int nmax; ! 1753: char pchar; ! 1754: { ! 1755: register char *sptr; ! 1756: register char ch; ! 1757: register int slash = 0; ! 1758: int maxlen; ! 1759: char cbuf; ! 1760: ! 1761: sptr = buf; ! 1762: maxlen = 0; ! 1763: while (sptr - buf < nmax) { ! 1764: if (promptlen > maxlen) maxlen = promptlen; ! 1765: ch = readch (); ! 1766: if (ch == '\\') { ! 1767: slash++; ! 1768: } ! 1769: else if ((ch == otty.sg_erase) && !slash) { ! 1770: if (sptr > buf) { ! 1771: --promptlen; ! 1772: ERASEONECHAR ! 1773: --sptr; ! 1774: if ((*sptr < ' ' && *sptr != '\n') || *sptr == RUBOUT) { ! 1775: --promptlen; ! 1776: ERASEONECHAR ! 1777: } ! 1778: continue; ! 1779: } ! 1780: else { ! 1781: if (!eraseln) promptlen = maxlen; ! 1782: longjmp (restore, 1); ! 1783: } ! 1784: } ! 1785: else if ((ch == otty.sg_kill) && !slash) { ! 1786: if (hard) { ! 1787: show (ch); ! 1788: putchar ('\n'); ! 1789: putchar (pchar); ! 1790: } ! 1791: else { ! 1792: putchar ('\r'); ! 1793: putchar (pchar); ! 1794: if (eraseln) ! 1795: erase (1); ! 1796: else if (docrtkill) ! 1797: while (promptlen-- > 1) ! 1798: write (2, BSB, sizeof(BSB)); ! 1799: promptlen = 1; ! 1800: } ! 1801: sptr = buf; ! 1802: fflush (stdout); ! 1803: continue; ! 1804: } ! 1805: if (slash && (ch == otty.sg_kill || ch == otty.sg_erase)) { ! 1806: ERASEONECHAR ! 1807: --sptr; ! 1808: } ! 1809: if (ch != '\\') ! 1810: slash = 0; ! 1811: *sptr++ = ch; ! 1812: if ((ch < ' ' && ch != '\n' && ch != ESC) || ch == RUBOUT) { ! 1813: ch += ch == RUBOUT ? -0100 : 0100; ! 1814: write (2, &CARAT, 1); ! 1815: promptlen++; ! 1816: } ! 1817: cbuf = ch; ! 1818: if (ch != '\n' && ch != ESC) { ! 1819: write (2, &cbuf, 1); ! 1820: promptlen++; ! 1821: } ! 1822: else ! 1823: break; ! 1824: } ! 1825: *--sptr = '\0'; ! 1826: if (!eraseln) promptlen = maxlen; ! 1827: if (sptr - buf >= nmax - 1) ! 1828: error ("Line too long"); ! 1829: } ! 1830: ! 1831: expand (outbuf, inbuf) ! 1832: char *outbuf; ! 1833: char *inbuf; ! 1834: { ! 1835: register char *instr; ! 1836: register char *outstr; ! 1837: register char ch; ! 1838: char temp[200]; ! 1839: int changed = 0; ! 1840: ! 1841: instr = inbuf; ! 1842: outstr = temp; ! 1843: while ((ch = *instr++) != '\0') ! 1844: switch (ch) { ! 1845: case '%': ! 1846: if (!no_intty) { ! 1847: strcpy (outstr, fnames[fnum]); ! 1848: outstr += strlen (fnames[fnum]); ! 1849: changed++; ! 1850: } ! 1851: else ! 1852: *outstr++ = ch; ! 1853: break; ! 1854: case '!': ! 1855: if (!shellp) ! 1856: error ("No previous command to substitute for"); ! 1857: strcpy (outstr, shell_line); ! 1858: outstr += strlen (shell_line); ! 1859: changed++; ! 1860: break; ! 1861: case '\\': ! 1862: if (*instr == '%' || *instr == '!') { ! 1863: *outstr++ = *instr++; ! 1864: break; ! 1865: } ! 1866: default: ! 1867: *outstr++ = ch; ! 1868: } ! 1869: *outstr++ = '\0'; ! 1870: strcpy (outbuf, temp); ! 1871: return (changed); ! 1872: } ! 1873: ! 1874: show (ch) ! 1875: register char ch; ! 1876: { ! 1877: char cbuf; ! 1878: ! 1879: if ((ch < ' ' && ch != '\n' && ch != ESC) || ch == RUBOUT) { ! 1880: ch += ch == RUBOUT ? -0100 : 0100; ! 1881: write (2, &CARAT, 1); ! 1882: promptlen++; ! 1883: } ! 1884: cbuf = ch; ! 1885: write (2, &cbuf, 1); ! 1886: promptlen++; ! 1887: } ! 1888: ! 1889: error (mess) ! 1890: char *mess; ! 1891: { ! 1892: if (clreol) ! 1893: cleareol (); ! 1894: else ! 1895: kill_line (); ! 1896: promptlen += strlen (mess); ! 1897: if (Senter && Sexit) { ! 1898: tputs (Senter, 1, putch); ! 1899: pr(mess); ! 1900: tputs (Sexit, 1, putch); ! 1901: } ! 1902: else ! 1903: pr (mess); ! 1904: fflush(stdout); ! 1905: errors++; ! 1906: longjmp (restore, 1); ! 1907: } ! 1908: ! 1909: ! 1910: set_tty () ! 1911: { ! 1912: otty.sg_flags |= MBIT; ! 1913: otty.sg_flags &= ~ECHO; ! 1914: stty(fileno(stderr), &otty); ! 1915: } ! 1916: ! 1917: reset_tty () ! 1918: { ! 1919: if (no_tty) ! 1920: return; ! 1921: if (pstate) { ! 1922: tputs(ULexit, 1, putch); ! 1923: fflush(stdout); ! 1924: pstate = 0; ! 1925: } ! 1926: otty.sg_flags |= ECHO; ! 1927: otty.sg_flags &= ~MBIT; ! 1928: stty(fileno(stderr), &savetty); ! 1929: } ! 1930: ! 1931: rdline (f) ! 1932: register FILE *f; ! 1933: { ! 1934: register char c; ! 1935: register char *p; ! 1936: ! 1937: p = Line; ! 1938: while ((c = Getc (f)) != '\n' && c != EOF && p - Line < LINSIZ - 1) ! 1939: *p++ = c; ! 1940: if (c == '\n') ! 1941: Currline++; ! 1942: *p = '\0'; ! 1943: } ! 1944: ! 1945: /* Come here when we get a suspend signal from the terminal */ ! 1946: #if !COHERENT ! 1947: onsusp () ! 1948: { ! 1949: /* ignore SIGTTOU so we don't get stopped if csh grabs the tty */ ! 1950: signal(SIGTTOU, SIG_IGN); ! 1951: reset_tty (); ! 1952: fflush (stdout); ! 1953: signal(SIGTTOU, SIG_DFL); ! 1954: /* Send the TSTP signal to suspend our process group */ ! 1955: signal(SIGTSTP, SIG_DFL); ! 1956: sigsetmask(0); ! 1957: kill (0, SIGTSTP); ! 1958: /* Pause for station break */ ! 1959: ! 1960: /* We're back */ ! 1961: signal (SIGTSTP, onsusp); ! 1962: set_tty (); ! 1963: if (inwait) ! 1964: longjmp (restore); ! 1965: } ! 1966: #endif
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.