Commit | Line | Data |
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5ff67f98 DF |
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 | ||
8b7ec80f | 13 | #ifndef lint |
4d242f02 | 14 | static char sccsid[] = "@(#)more.c 5.2 (Berkeley) %G%"; |
5ff67f98 | 15 | #endif not lint |
35bd36fc | 16 | |
ffa58356 ES |
17 | /* |
18 | ** more.c - General purpose tty output filter and file perusal program | |
19 | ** | |
20 | ** by Eric Shienbrood, UC Berkeley | |
35bd36fc BJ |
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 | |
ffa58356 ES |
24 | */ |
25 | ||
ffa58356 | 26 | #include <stdio.h> |
4a56d647 | 27 | #include <sys/types.h> |
ffa58356 ES |
28 | #include <ctype.h> |
29 | #include <signal.h> | |
30 | #include <errno.h> | |
31 | #include <sgtty.h> | |
32 | #include <setjmp.h> | |
ffa58356 | 33 | #include <sys/stat.h> |
ffa58356 | 34 | |
8b7ec80f SL |
35 | #define HELPFILE "/usr/lib/more.help" |
36 | #define VI "/usr/ucb/vi" | |
ffa58356 ES |
37 | |
38 | #define Fopen(s,m) (Currline = 0,file_pos=0,fopen(s,m)) | |
39 | #define Ftell(f) file_pos | |
40 | #define Fseek(f,off) (file_pos=off,fseek(f,off,0)) | |
41 | #define Getc(f) (++file_pos, getc(f)) | |
42 | #define Ungetc(c,f) (--file_pos, ungetc(c,f)) | |
43 | ||
ffa58356 ES |
44 | #define MBIT CBREAK |
45 | #define stty(fd,argp) ioctl(fd,TIOCSETN,argp) | |
ffa58356 ES |
46 | |
47 | #define TBUFSIZ 1024 | |
48 | #define LINSIZ 256 | |
49 | #define ctrl(letter) ('letter' & 077) | |
50 | #define RUBOUT '\177' | |
51 | #define ESC '\033' | |
52 | #define QUIT '\034' | |
53 | ||
d730d1dc | 54 | struct sgttyb otty, savetty; |
ffa58356 ES |
55 | long file_pos, file_size; |
56 | int fnum, no_intty, no_tty, slow_tty; | |
57 | int dum_opt, dlines, onquit(), end_it(); | |
ffa58356 | 58 | int onsusp(); |
ffa58356 ES |
59 | int nscroll = 11; /* Number of lines scrolled by 'd' */ |
60 | int fold_opt = 1; /* Fold long lines */ | |
61 | int stop_opt = 1; /* Stop after form feeds */ | |
35bd36fc BJ |
62 | int ssp_opt = 0; /* Suppress white space */ |
63 | int ul_opt = 1; /* Underline as best we can */ | |
ffa58356 ES |
64 | int promptlen; |
65 | int Currline; /* Line we are currently at */ | |
66 | int startup = 1; | |
67 | int firstf = 1; | |
68 | int notell = 1; | |
4a56d647 CL |
69 | int docrterase = 0; |
70 | int docrtkill = 0; | |
ffa58356 ES |
71 | int bad_so; /* True if overwriting does not turn off standout */ |
72 | int inwait, Pause, errors; | |
73 | int within; /* true if we are within a file, | |
74 | false if we are between files */ | |
35bd36fc | 75 | int hard, dumb, noscroll, hardtabs, clreol; |
ffa58356 ES |
76 | int catch_susp; /* We should catch the SIGTSTP signal */ |
77 | char **fnames; /* The list of file names */ | |
78 | int nfiles; /* Number of files left to process */ | |
79 | char *shell; /* The name of the shell to use */ | |
80 | int shellp; /* A previous shell command exists */ | |
81 | char ch; | |
82 | jmp_buf restore; | |
ffa58356 ES |
83 | char Line[LINSIZ]; /* Line buffer */ |
84 | int Lpp = 24; /* lines per page */ | |
85 | char *Clear; /* clear screen */ | |
86 | char *eraseln; /* erase line */ | |
87 | char *Senter, *Sexit;/* enter and exit standout mode */ | |
35bd36fc BJ |
88 | char *ULenter, *ULexit; /* enter and exit underline mode */ |
89 | char *chUL; /* underline character */ | |
90 | char *chBS; /* backspace character */ | |
38ccf597 BJ |
91 | char *Home; /* go to home */ |
92 | char *cursorm; /* cursor movement */ | |
93 | char cursorhome[40]; /* contains cursor movement to home */ | |
35bd36fc | 94 | char *EodClr; /* clear rest of screen */ |
ffa58356 ES |
95 | char *tgetstr(); |
96 | int Mcol = 80; /* number of columns */ | |
97 | int Wrap = 1; /* set if automargins */ | |
2c880657 JK |
98 | int soglitch; /* terminal has standout mode glitch */ |
99 | int ulglitch; /* terminal has underline mode glitch */ | |
100 | int pstate = 0; /* current UL state */ | |
ffa58356 | 101 | long fseek(); |
38ccf597 | 102 | char *getenv(); |
ffa58356 ES |
103 | struct { |
104 | long chrctr, line; | |
105 | } context, screen_start; | |
106 | extern char PC; /* pad character */ | |
107 | extern short ospeed; | |
108 | ||
109 | ||
110 | main(argc, argv) | |
111 | int argc; | |
112 | char *argv[]; | |
113 | { | |
114 | register FILE *f; | |
115 | register char *s; | |
116 | register char *p; | |
117 | register char ch; | |
118 | register int left; | |
d730d1dc | 119 | int prnames = 0; |
ffa58356 ES |
120 | int initopt = 0; |
121 | int srchopt = 0; | |
122 | int clearit = 0; | |
123 | int initline; | |
124 | char initbuf[80]; | |
125 | FILE *checkf(); | |
126 | ||
127 | nfiles = argc; | |
128 | fnames = argv; | |
129 | initterm (); | |
88cdaae7 RC |
130 | nscroll = Lpp/2 - 1; |
131 | if (nscroll <= 0) | |
132 | nscroll = 1; | |
38ccf597 | 133 | if(s = getenv("MORE")) argscan(s); |
ffa58356 ES |
134 | while (--nfiles > 0) { |
135 | if ((ch = (*++fnames)[0]) == '-') { | |
38ccf597 | 136 | argscan(*fnames+1); |
ffa58356 ES |
137 | } |
138 | else if (ch == '+') { | |
139 | s = *fnames; | |
140 | if (*++s == '/') { | |
141 | srchopt++; | |
142 | for (++s, p = initbuf; p < initbuf + 79 && *s != '\0';) | |
143 | *p++ = *s++; | |
144 | *p = '\0'; | |
145 | } | |
146 | else { | |
147 | initopt++; | |
148 | for (initline = 0; *s != '\0'; s++) | |
149 | if (isdigit (*s)) | |
150 | initline = initline*10 + *s -'0'; | |
151 | --initline; | |
152 | } | |
153 | } | |
154 | else break; | |
155 | } | |
35bd36fc | 156 | /* allow clreol only if Home and eraseln and EodClr strings are |
38ccf597 BJ |
157 | * defined, and in that case, make sure we are in noscroll mode |
158 | */ | |
159 | if(clreol) | |
160 | { | |
8b9ba60d RC |
161 | if((Home == NULL) || (*Home == '\0') || |
162 | (eraseln == NULL) || (*eraseln == '\0') || | |
163 | (EodClr == NULL) || (*EodClr == '\0') ) | |
164 | clreol = 0; | |
38ccf597 BJ |
165 | else noscroll = 1; |
166 | } | |
ffa58356 ES |
167 | if (dlines == 0) |
168 | dlines = Lpp - (noscroll ? 1 : 2); | |
169 | left = dlines; | |
170 | if (nfiles > 1) | |
171 | prnames++; | |
172 | if (!no_intty && nfiles == 0) { | |
173 | fputs("Usage: ",stderr); | |
174 | fputs(argv[0],stderr); | |
175 | fputs(" [-dfln] [+linenum | +/pattern] name1 name2 ...\n",stderr); | |
176 | exit(1); | |
177 | } | |
178 | else | |
179 | f = stdin; | |
180 | if (!no_tty) { | |
181 | signal(SIGQUIT, onquit); | |
182 | signal(SIGINT, end_it); | |
ffa58356 ES |
183 | if (signal (SIGTSTP, SIG_IGN) == SIG_DFL) { |
184 | signal(SIGTSTP, onsusp); | |
185 | catch_susp++; | |
186 | } | |
d730d1dc | 187 | stty (fileno(stderr), &otty); |
ffa58356 ES |
188 | } |
189 | if (no_intty) { | |
190 | if (no_tty) | |
191 | copy_file (stdin); | |
192 | else { | |
193 | if ((ch = Getc (f)) == '\f') | |
35bd36fc | 194 | doclear(); |
ffa58356 ES |
195 | else { |
196 | Ungetc (ch, f); | |
35bd36fc BJ |
197 | if (noscroll && (ch != EOF)) { |
198 | if (clreol) | |
199 | home (); | |
200 | else | |
201 | doclear (); | |
38ccf597 | 202 | } |
ffa58356 ES |
203 | } |
204 | if (srchopt) | |
38ccf597 | 205 | { |
ffa58356 | 206 | search (initbuf, stdin, 1); |
35bd36fc BJ |
207 | if (noscroll) |
208 | left--; | |
38ccf597 | 209 | } |
ffa58356 ES |
210 | else if (initopt) |
211 | skiplns (initline, stdin); | |
212 | screen (stdin, left); | |
213 | } | |
214 | no_intty = 0; | |
215 | prnames++; | |
216 | firstf = 0; | |
217 | } | |
218 | ||
219 | while (fnum < nfiles) { | |
220 | if ((f = checkf (fnames[fnum], &clearit)) != NULL) { | |
221 | context.line = context.chrctr = 0; | |
222 | Currline = 0; | |
223 | if (firstf) setjmp (restore); | |
224 | if (firstf) { | |
225 | firstf = 0; | |
226 | if (srchopt) | |
38ccf597 | 227 | { |
ffa58356 | 228 | search (initbuf, f, 1); |
35bd36fc BJ |
229 | if (noscroll) |
230 | left--; | |
38ccf597 | 231 | } |
ffa58356 ES |
232 | else if (initopt) |
233 | skiplns (initline, f); | |
234 | } | |
235 | else if (fnum < nfiles && !no_tty) { | |
236 | setjmp (restore); | |
237 | left = command (fnames[fnum], f); | |
238 | } | |
239 | if (left != 0) { | |
35bd36fc BJ |
240 | if ((noscroll || clearit) && (file_size != 0x7fffffffffffffffL)) |
241 | if (clreol) | |
242 | home (); | |
243 | else | |
244 | doclear (); | |
ffa58356 ES |
245 | if (prnames) { |
246 | if (bad_so) | |
247 | erase (0); | |
35bd36fc BJ |
248 | if (clreol) |
249 | cleareol (); | |
ffa58356 ES |
250 | pr("::::::::::::::"); |
251 | if (promptlen > 14) | |
252 | erase (14); | |
38ccf597 BJ |
253 | printf ("\n"); |
254 | if(clreol) cleareol(); | |
255 | printf("%s\n", fnames[fnum]); | |
256 | if(clreol) cleareol(); | |
257 | printf("::::::::::::::\n", fnames[fnum]); | |
ffa58356 ES |
258 | if (left > Lpp - 4) |
259 | left = Lpp - 4; | |
260 | } | |
261 | if (no_tty) | |
262 | copy_file (f); | |
263 | else { | |
264 | within++; | |
265 | screen(f, left); | |
266 | within = 0; | |
267 | } | |
268 | } | |
269 | setjmp (restore); | |
270 | fflush(stdout); | |
271 | fclose(f); | |
272 | screen_start.line = screen_start.chrctr = 0L; | |
273 | context.line = context.chrctr = 0L; | |
274 | } | |
275 | fnum++; | |
276 | firstf = 0; | |
277 | } | |
278 | reset_tty (); | |
279 | exit(0); | |
280 | } | |
281 | ||
38ccf597 BJ |
282 | argscan(s) |
283 | char *s; | |
284 | { | |
718f6e88 KL |
285 | for (dlines = 0; *s != '\0'; s++) |
286 | { | |
287 | switch (*s) | |
288 | { | |
289 | case '0': case '1': case '2': | |
290 | case '3': case '4': case '5': | |
291 | case '6': case '7': case '8': | |
292 | case '9': | |
293 | dlines = dlines*10 + *s - '0'; | |
294 | break; | |
295 | case 'd': | |
296 | dum_opt = 1; | |
297 | break; | |
298 | case 'l': | |
299 | stop_opt = 0; | |
300 | break; | |
301 | case 'f': | |
302 | fold_opt = 0; | |
303 | break; | |
304 | case 'p': | |
305 | noscroll++; | |
306 | break; | |
307 | case 'c': | |
308 | clreol++; | |
309 | break; | |
310 | case 's': | |
311 | ssp_opt = 1; | |
312 | break; | |
313 | case 'u': | |
314 | ul_opt = 0; | |
315 | break; | |
316 | } | |
317 | } | |
38ccf597 BJ |
318 | } |
319 | ||
320 | ||
ffa58356 ES |
321 | /* |
322 | ** Check whether the file named by fs is an ASCII file which the user may | |
323 | ** access. If it is, return the opened file. Otherwise return NULL. | |
324 | */ | |
325 | ||
326 | FILE * | |
327 | checkf (fs, clearfirst) | |
328 | register char *fs; | |
329 | int *clearfirst; | |
330 | { | |
331 | struct stat stbuf; | |
332 | register FILE *f; | |
333 | char c; | |
334 | ||
335 | if (stat (fs, &stbuf) == -1) { | |
336 | fflush(stdout); | |
35bd36fc BJ |
337 | if (clreol) |
338 | cleareol (); | |
ffa58356 ES |
339 | perror(fs); |
340 | return (NULL); | |
341 | } | |
342 | if ((stbuf.st_mode & S_IFMT) == S_IFDIR) { | |
343 | printf("\n*** %s: directory ***\n\n", fs); | |
344 | return (NULL); | |
345 | } | |
346 | if ((f=Fopen(fs, "r")) == NULL) { | |
347 | fflush(stdout); | |
348 | perror(fs); | |
349 | return (NULL); | |
350 | } | |
351 | c = Getc(f); | |
352 | ||
353 | /* Try to see whether it is an ASCII file */ | |
354 | ||
355 | switch ((c | *f->_ptr << 8) & 0177777) { | |
356 | case 0405: | |
357 | case 0407: | |
358 | case 0410: | |
359 | case 0411: | |
360 | case 0413: | |
361 | case 0177545: | |
362 | printf("\n******** %s: Not a text file ********\n\n", fs); | |
363 | fclose (f); | |
364 | return (NULL); | |
365 | default: | |
366 | break; | |
367 | } | |
368 | if (c == '\f') | |
369 | *clearfirst = 1; | |
370 | else { | |
371 | *clearfirst = 0; | |
372 | Ungetc (c, f); | |
373 | } | |
374 | if ((file_size = stbuf.st_size) == 0) | |
375 | file_size = 0x7fffffffffffffffL; | |
376 | return (f); | |
377 | } | |
378 | ||
379 | /* | |
380 | ** A real function, for the tputs routine in termlib | |
381 | */ | |
382 | ||
383 | putch (ch) | |
384 | char ch; | |
385 | { | |
386 | putchar (ch); | |
387 | } | |
388 | ||
389 | /* | |
390 | ** Print out the contents of the file f, one screenful at a time. | |
391 | */ | |
392 | ||
393 | #define STOP -10 | |
394 | ||
395 | screen (f, num_lines) | |
396 | register FILE *f; | |
397 | register int num_lines; | |
398 | { | |
399 | register int c; | |
400 | register int nchars; | |
35bd36fc BJ |
401 | int length; /* length of current line */ |
402 | static int prev_len = 1; /* length of previous line */ | |
ffa58356 ES |
403 | |
404 | for (;;) { | |
405 | while (num_lines > 0 && !Pause) { | |
406 | if ((nchars = getline (f, &length)) == EOF) | |
38ccf597 | 407 | { |
35bd36fc BJ |
408 | if (clreol) |
409 | clreos(); | |
ffa58356 | 410 | return; |
38ccf597 | 411 | } |
35bd36fc BJ |
412 | if (ssp_opt && length == 0 && prev_len == 0) |
413 | continue; | |
414 | prev_len = length; | |
ffa58356 ES |
415 | if (bad_so || (Senter && *Senter == ' ') && promptlen > 0) |
416 | erase (0); | |
35bd36fc BJ |
417 | /* must clear before drawing line since tabs on some terminals |
418 | * do not erase what they tab over. | |
419 | */ | |
420 | if (clreol) | |
421 | cleareol (); | |
ffa58356 ES |
422 | prbuf (Line, length); |
423 | if (nchars < promptlen) | |
424 | erase (nchars); /* erase () sets promptlen to 0 */ | |
425 | else promptlen = 0; | |
35bd36fc BJ |
426 | /* is this needed? |
427 | * if (clreol) | |
428 | * cleareol(); /* must clear again in case we wrapped * | |
429 | */ | |
ffa58356 | 430 | if (nchars < Mcol || !fold_opt) |
2c880657 | 431 | prbuf("\n", 1); /* will turn off UL if necessary */ |
ffa58356 ES |
432 | if (nchars == STOP) |
433 | break; | |
434 | num_lines--; | |
435 | } | |
2c880657 JK |
436 | if (pstate) { |
437 | tputs(ULexit, 1, putch); | |
438 | pstate = 0; | |
439 | } | |
ffa58356 ES |
440 | fflush(stdout); |
441 | if ((c = Getc(f)) == EOF) | |
38ccf597 | 442 | { |
35bd36fc BJ |
443 | if (clreol) |
444 | clreos (); | |
ffa58356 | 445 | return; |
38ccf597 BJ |
446 | } |
447 | ||
35bd36fc BJ |
448 | if (Pause && clreol) |
449 | clreos (); | |
ffa58356 ES |
450 | Ungetc (c, f); |
451 | setjmp (restore); | |
452 | Pause = 0; startup = 0; | |
453 | if ((num_lines = command (NULL, f)) == 0) | |
454 | return; | |
455 | if (hard && promptlen > 0) | |
456 | erase (0); | |
a97c843b | 457 | if (noscroll && num_lines >= dlines) |
d730d1dc | 458 | { |
35bd36fc BJ |
459 | if (clreol) |
460 | home(); | |
461 | else | |
462 | doclear (); | |
38ccf597 | 463 | } |
ffa58356 ES |
464 | screen_start.line = Currline; |
465 | screen_start.chrctr = Ftell (f); | |
466 | } | |
467 | } | |
468 | ||
469 | /* | |
470 | ** Come here if a quit signal is received | |
471 | */ | |
472 | ||
473 | onquit() | |
474 | { | |
475 | signal(SIGQUIT, SIG_IGN); | |
476 | if (!inwait) { | |
477 | putchar ('\n'); | |
478 | if (!startup) { | |
479 | signal(SIGQUIT, onquit); | |
480 | longjmp (restore, 1); | |
481 | } | |
482 | else | |
483 | Pause++; | |
484 | } | |
485 | else if (!dum_opt && notell) { | |
486 | write (2, "[Use q or Q to quit]", 20); | |
487 | promptlen += 20; | |
488 | notell = 0; | |
489 | } | |
490 | signal(SIGQUIT, onquit); | |
491 | } | |
492 | ||
493 | /* | |
494 | ** Clean up terminal state and exit. Also come here if interrupt signal received | |
495 | */ | |
496 | ||
497 | end_it () | |
498 | { | |
499 | ||
500 | reset_tty (); | |
35bd36fc BJ |
501 | if (clreol) { |
502 | putchar ('\r'); | |
503 | clreos (); | |
504 | fflush (stdout); | |
505 | } | |
38ccf597 | 506 | else if (!clreol && (promptlen > 0)) { |
ffa58356 ES |
507 | kill_line (); |
508 | fflush (stdout); | |
509 | } | |
510 | else | |
511 | write (2, "\n", 1); | |
512 | _exit(0); | |
513 | } | |
514 | ||
515 | copy_file(f) | |
516 | register FILE *f; | |
517 | { | |
518 | register int c; | |
519 | ||
520 | while ((c = getc(f)) != EOF) | |
521 | putchar(c); | |
522 | } | |
523 | ||
524 | /* Simplified printf function */ | |
525 | ||
526 | printf (fmt, args) | |
527 | register char *fmt; | |
528 | int args; | |
529 | { | |
530 | register int *argp; | |
531 | register char ch; | |
532 | register int ccount; | |
533 | ||
534 | ccount = 0; | |
535 | argp = &args; | |
536 | while (*fmt) { | |
537 | while ((ch = *fmt++) != '%') { | |
538 | if (ch == '\0') | |
539 | return (ccount); | |
540 | ccount++; | |
541 | putchar (ch); | |
542 | } | |
543 | switch (*fmt++) { | |
544 | case 'd': | |
545 | ccount += printd (*argp); | |
546 | break; | |
547 | case 's': | |
548 | ccount += pr ((char *)*argp); | |
549 | break; | |
550 | case '%': | |
551 | ccount++; | |
552 | argp--; | |
553 | putchar ('%'); | |
554 | break; | |
555 | case '0': | |
556 | return (ccount); | |
557 | default: | |
558 | break; | |
559 | } | |
560 | ++argp; | |
561 | } | |
562 | return (ccount); | |
563 | ||
564 | } | |
565 | ||
566 | /* | |
567 | ** Print an integer as a string of decimal digits, | |
568 | ** returning the length of the print representation. | |
569 | */ | |
570 | ||
571 | printd (n) | |
572 | int n; | |
573 | { | |
574 | int a, nchars; | |
575 | ||
576 | if (a = n/10) | |
577 | nchars = 1 + printd(a); | |
578 | else | |
579 | nchars = 1; | |
580 | putchar (n % 10 + '0'); | |
581 | return (nchars); | |
582 | } | |
583 | ||
584 | /* Put the print representation of an integer into a string */ | |
585 | static char *sptr; | |
586 | ||
587 | scanstr (n, str) | |
588 | int n; | |
589 | char *str; | |
590 | { | |
591 | sptr = str; | |
718f6e88 | 592 | Sprintf (n); |
ffa58356 ES |
593 | *sptr = '\0'; |
594 | } | |
595 | ||
718f6e88 | 596 | Sprintf (n) |
ffa58356 ES |
597 | { |
598 | int a; | |
599 | ||
600 | if (a = n/10) | |
718f6e88 | 601 | Sprintf (a); |
ffa58356 ES |
602 | *sptr++ = n % 10 + '0'; |
603 | } | |
604 | ||
605 | static char bell = ctrl(G); | |
606 | ||
607 | strlen (s) | |
608 | char *s; | |
609 | { | |
610 | register char *p; | |
611 | ||
612 | p = s; | |
613 | while (*p++) | |
614 | ; | |
615 | return (p - s - 1); | |
616 | } | |
617 | ||
618 | /* See whether the last component of the path name "path" is equal to the | |
619 | ** string "string" | |
620 | */ | |
621 | ||
622 | tailequ (path, string) | |
623 | char *path; | |
624 | register char *string; | |
625 | { | |
626 | register char *tail; | |
627 | ||
628 | tail = path + strlen(path); | |
629 | while (tail >= path) | |
630 | if (*(--tail) == '/') | |
631 | break; | |
632 | ++tail; | |
633 | while (*tail++ == *string++) | |
634 | if (*tail == '\0') | |
635 | return(1); | |
636 | return(0); | |
637 | } | |
638 | ||
639 | prompt (filename) | |
640 | char *filename; | |
641 | { | |
35bd36fc BJ |
642 | if (clreol) |
643 | cleareol (); | |
38ccf597 | 644 | else if (promptlen > 0) |
ffa58356 ES |
645 | kill_line (); |
646 | if (!hard) { | |
647 | promptlen = 8; | |
2c880657 | 648 | if (Senter && Sexit) { |
ffa58356 | 649 | tputs (Senter, 1, putch); |
2c880657 JK |
650 | promptlen += (2 * soglitch); |
651 | } | |
35bd36fc BJ |
652 | if (clreol) |
653 | cleareol (); | |
ffa58356 ES |
654 | pr("--More--"); |
655 | if (filename != NULL) { | |
656 | promptlen += printf ("(Next file: %s)", filename); | |
657 | } | |
658 | else if (!no_intty) { | |
659 | promptlen += printf ("(%d%%)", (int)((file_pos * 100) / file_size)); | |
660 | } | |
661 | if (dum_opt) { | |
2c880657 | 662 | promptlen += pr("[Press space to continue, 'q' to quit.]"); |
ffa58356 ES |
663 | } |
664 | if (Senter && Sexit) | |
665 | tputs (Sexit, 1, putch); | |
35bd36fc BJ |
666 | if (clreol) |
667 | clreos (); | |
ffa58356 ES |
668 | fflush(stdout); |
669 | } | |
670 | else | |
671 | write (2, &bell, 1); | |
672 | inwait++; | |
673 | } | |
674 | ||
675 | /* | |
676 | ** Get a logical line | |
677 | */ | |
678 | ||
679 | getline(f, length) | |
680 | register FILE *f; | |
681 | int *length; | |
682 | { | |
683 | register int c; | |
684 | register char *p; | |
685 | register int column; | |
686 | static int colflg; | |
687 | ||
688 | p = Line; | |
689 | column = 0; | |
690 | c = Getc (f); | |
691 | if (colflg && c == '\n') { | |
692 | Currline++; | |
693 | c = Getc (f); | |
694 | } | |
695 | while (p < &Line[LINSIZ - 1]) { | |
696 | if (c == EOF) { | |
697 | if (p > Line) { | |
698 | *p = '\0'; | |
699 | *length = p - Line; | |
700 | return (column); | |
701 | } | |
702 | *length = p - Line; | |
703 | return (EOF); | |
704 | } | |
705 | if (c == '\n') { | |
706 | Currline++; | |
707 | break; | |
708 | } | |
709 | *p++ = c; | |
710 | if (c == '\t') | |
711 | if (hardtabs && column < promptlen && !hard) { | |
712 | if (eraseln && !dumb) { | |
713 | column = 1 + (column | 7); | |
714 | tputs (eraseln, 1, putch); | |
715 | promptlen = 0; | |
716 | } | |
717 | else { | |
718 | for (--p; column & 7 && p < &Line[LINSIZ - 1]; column++) { | |
719 | *p++ = ' '; | |
720 | } | |
721 | if (column >= promptlen) promptlen = 0; | |
722 | } | |
723 | } | |
724 | else | |
725 | column = 1 + (column | 7); | |
d1b174c2 | 726 | else if (c == '\b' && column > 0) |
ffa58356 ES |
727 | column--; |
728 | else if (c == '\r') | |
729 | column = 0; | |
730 | else if (c == '\f' && stop_opt) { | |
731 | p[-1] = '^'; | |
732 | *p++ = 'L'; | |
733 | column += 2; | |
734 | Pause++; | |
735 | } | |
736 | else if (c == EOF) { | |
737 | *length = p - Line; | |
738 | return (column); | |
739 | } | |
740 | else if (c >= ' ' && c != RUBOUT) | |
741 | column++; | |
742 | if (column >= Mcol && fold_opt) break; | |
743 | c = Getc (f); | |
744 | } | |
745 | if (column >= Mcol && Mcol > 0) { | |
746 | if (!Wrap) { | |
747 | *p++ = '\n'; | |
748 | } | |
749 | } | |
750 | colflg = column == Mcol && fold_opt; | |
751 | *length = p - Line; | |
752 | *p = 0; | |
753 | return (column); | |
754 | } | |
755 | ||
756 | /* | |
757 | ** Erase the rest of the prompt, assuming we are starting at column col. | |
758 | */ | |
759 | ||
760 | erase (col) | |
761 | register int col; | |
762 | { | |
763 | ||
764 | if (promptlen == 0) | |
765 | return; | |
766 | if (hard) { | |
767 | putchar ('\n'); | |
768 | } | |
769 | else { | |
770 | if (col == 0) | |
771 | putchar ('\r'); | |
772 | if (!dumb && eraseln) | |
773 | tputs (eraseln, 1, putch); | |
774 | else | |
775 | for (col = promptlen - col; col > 0; col--) | |
776 | putchar (' '); | |
777 | } | |
778 | promptlen = 0; | |
779 | } | |
780 | ||
781 | /* | |
782 | ** Erase the current line entirely | |
783 | */ | |
784 | ||
785 | kill_line () | |
786 | { | |
787 | erase (0); | |
788 | if (!eraseln || dumb) putchar ('\r'); | |
789 | } | |
790 | ||
38ccf597 BJ |
791 | /* |
792 | * force clear to end of line | |
793 | */ | |
794 | cleareol() | |
795 | { | |
35bd36fc | 796 | tputs(eraseln, 1, putch); |
38ccf597 BJ |
797 | } |
798 | ||
35bd36fc | 799 | clreos() |
38ccf597 | 800 | { |
35bd36fc | 801 | tputs(EodClr, 1, putch); |
38ccf597 BJ |
802 | } |
803 | ||
ffa58356 ES |
804 | /* |
805 | ** Print string and return number of characters | |
806 | */ | |
807 | ||
808 | pr(s1) | |
809 | char *s1; | |
810 | { | |
811 | register char *s; | |
812 | register char c; | |
813 | ||
814 | for (s = s1; c = *s++; ) | |
815 | putchar(c); | |
816 | return (s - s1 - 1); | |
817 | } | |
818 | ||
819 | ||
820 | /* Print a buffer of n characters */ | |
821 | ||
822 | prbuf (s, n) | |
823 | register char *s; | |
824 | register int n; | |
825 | { | |
2c880657 | 826 | register char c; /* next output character */ |
35bd36fc | 827 | register int state; /* next output char's UL state */ |
2c880657 | 828 | #define wouldul(s,n) ((n) >= 2 && (((s)[0] == '_' && (s)[1] == '\b') || ((s)[1] == '\b' && (s)[2] == '_'))) |
35bd36fc BJ |
829 | |
830 | while (--n >= 0) | |
831 | if (!ul_opt) | |
832 | putchar (*s++); | |
833 | else { | |
2c880657 JK |
834 | if (*s == ' ' && pstate == 0 && ulglitch && wouldul(s+1, n-1)) { |
835 | s++; | |
836 | continue; | |
837 | } | |
838 | if (state = wouldul(s, n)) { | |
839 | c = (*s == '_')? s[2] : *s ; | |
35bd36fc | 840 | n -= 2; |
2c880657 JK |
841 | s += 3; |
842 | } else | |
35bd36fc | 843 | c = *s++; |
2c880657 JK |
844 | if (state != pstate) { |
845 | if (c == ' ' && state == 0 && ulglitch && wouldul(s, n-1)) | |
846 | state = 1; | |
847 | else | |
848 | tputs(state ? ULenter : ULexit, 1, putch); | |
35bd36fc | 849 | } |
2c880657 JK |
850 | if (c != ' ' || pstate == 0 || state != 0 || ulglitch == 0) |
851 | putchar(c); | |
35bd36fc BJ |
852 | if (state && *chUL) { |
853 | pr(chBS); | |
854 | tputs(chUL, 1, putch); | |
855 | } | |
2c880657 | 856 | pstate = state; |
35bd36fc | 857 | } |
ffa58356 ES |
858 | } |
859 | ||
860 | /* | |
861 | ** Clear the screen | |
862 | */ | |
863 | ||
864 | doclear() | |
865 | { | |
866 | if (Clear && !hard) { | |
867 | tputs(Clear, 1, putch); | |
868 | ||
869 | /* Put out carriage return so that system doesn't | |
870 | ** get confused by escape sequences when expanding tabs | |
871 | */ | |
872 | putchar ('\r'); | |
873 | promptlen = 0; | |
874 | } | |
875 | } | |
876 | ||
38ccf597 BJ |
877 | /* |
878 | * Go to home position | |
879 | */ | |
880 | home() | |
881 | { | |
882 | tputs(Home,1,putch); | |
883 | } | |
884 | ||
ffa58356 ES |
885 | static int lastcmd, lastarg, lastp; |
886 | static int lastcolon; | |
887 | char shell_line[132]; | |
888 | ||
889 | /* | |
890 | ** Read a command and do it. A command consists of an optional integer | |
891 | ** argument followed by the command character. Return the number of lines | |
892 | ** to display in the next screenful. If there is nothing more to display | |
893 | ** in the current file, zero is returned. | |
894 | */ | |
895 | ||
896 | command (filename, f) | |
897 | char *filename; | |
898 | register FILE *f; | |
899 | { | |
900 | register int nlines; | |
901 | register int retval; | |
902 | register char c; | |
903 | char colonch; | |
904 | FILE *helpf; | |
905 | int done; | |
906 | char comchar, cmdbuf[80], *p; | |
907 | ||
908 | #define ret(val) retval=val;done++;break | |
909 | ||
910 | done = 0; | |
911 | if (!errors) | |
912 | prompt (filename); | |
913 | else | |
914 | errors = 0; | |
915 | if (MBIT == RAW && slow_tty) { | |
916 | otty.sg_flags |= MBIT; | |
d730d1dc | 917 | stty(fileno(stderr), &otty); |
ffa58356 ES |
918 | } |
919 | for (;;) { | |
920 | nlines = number (&comchar); | |
921 | lastp = colonch = 0; | |
922 | if (comchar == '.') { /* Repeat last command */ | |
923 | lastp++; | |
924 | comchar = lastcmd; | |
925 | nlines = lastarg; | |
926 | if (lastcmd == ':') | |
927 | colonch = lastcolon; | |
928 | } | |
929 | lastcmd = comchar; | |
930 | lastarg = nlines; | |
931 | if (comchar == otty.sg_erase) { | |
932 | kill_line (); | |
933 | prompt (filename); | |
934 | continue; | |
935 | } | |
936 | switch (comchar) { | |
937 | case ':': | |
938 | retval = colon (filename, colonch, nlines); | |
939 | if (retval >= 0) | |
940 | done++; | |
941 | break; | |
4d242f02 JB |
942 | case 'b': |
943 | case ctrl(B): | |
944 | { | |
945 | register int initline; | |
946 | ||
947 | if (no_intty) { | |
948 | write(2, &bell, 1); | |
949 | return (-1); | |
950 | } | |
951 | ||
952 | if (nlines == 0) nlines++; | |
953 | ||
954 | putchar ('\r'); | |
955 | erase (0); | |
956 | printf ("\n"); | |
957 | if (clreol) | |
958 | cleareol (); | |
959 | printf ("...back %d page", nlines); | |
960 | if (nlines > 1) | |
961 | pr ("s\n"); | |
962 | else | |
963 | pr ("\n"); | |
964 | ||
965 | if (clreol) | |
966 | cleareol (); | |
967 | pr ("\n"); | |
968 | ||
969 | initline = Currline - dlines * (nlines + 1); | |
970 | if (! noscroll) | |
971 | --initline; | |
972 | if (initline < 0) initline = 0; | |
973 | Fseek(f, 0L); | |
974 | Currline = 0; /* skiplns() will make Currline correct */ | |
975 | skiplns(initline, f); | |
976 | if (! noscroll) { | |
977 | ret(dlines + 1); | |
978 | } | |
979 | else { | |
980 | ret(dlines); | |
981 | } | |
982 | } | |
ffa58356 ES |
983 | case ' ': |
984 | case 'z': | |
985 | if (nlines == 0) nlines = dlines; | |
986 | else if (comchar == 'z') dlines = nlines; | |
987 | ret (nlines); | |
988 | case 'd': | |
989 | case ctrl(D): | |
990 | if (nlines != 0) nscroll = nlines; | |
991 | ret (nscroll); | |
ffa58356 ES |
992 | case 'q': |
993 | case 'Q': | |
994 | end_it (); | |
995 | case 's': | |
996 | case 'f': | |
997 | if (nlines == 0) nlines++; | |
998 | if (comchar == 'f') | |
999 | nlines *= dlines; | |
1000 | putchar ('\r'); | |
1001 | erase (0); | |
35bd36fc BJ |
1002 | printf ("\n"); |
1003 | if (clreol) | |
1004 | cleareol (); | |
1005 | printf ("...skipping %d line", nlines); | |
ffa58356 | 1006 | if (nlines > 1) |
35bd36fc | 1007 | pr ("s\n"); |
ffa58356 | 1008 | else |
35bd36fc BJ |
1009 | pr ("\n"); |
1010 | ||
1011 | if (clreol) | |
1012 | cleareol (); | |
1013 | pr ("\n"); | |
1014 | ||
ffa58356 ES |
1015 | while (nlines > 0) { |
1016 | while ((c = Getc (f)) != '\n') | |
1017 | if (c == EOF) { | |
1018 | retval = 0; | |
1019 | done++; | |
1020 | goto endsw; | |
1021 | } | |
1022 | Currline++; | |
1023 | nlines--; | |
1024 | } | |
1025 | ret (dlines); | |
1026 | case '\n': | |
1027 | if (nlines != 0) | |
1028 | dlines = nlines; | |
1029 | else | |
1030 | nlines = 1; | |
1031 | ret (nlines); | |
1032 | case '\f': | |
1033 | if (!no_intty) { | |
1034 | doclear (); | |
1035 | Fseek (f, screen_start.chrctr); | |
1036 | Currline = screen_start.line; | |
1037 | ret (dlines); | |
1038 | } | |
1039 | else { | |
1040 | write (2, &bell, 1); | |
1041 | break; | |
1042 | } | |
1043 | case '\'': | |
1044 | if (!no_intty) { | |
1045 | kill_line (); | |
1046 | pr ("\n***Back***\n\n"); | |
1047 | Fseek (f, context.chrctr); | |
1048 | Currline = context.line; | |
1049 | ret (dlines); | |
1050 | } | |
1051 | else { | |
1052 | write (2, &bell, 1); | |
1053 | break; | |
1054 | } | |
1055 | case '=': | |
1056 | kill_line (); | |
1057 | promptlen = printd (Currline); | |
1058 | fflush (stdout); | |
1059 | break; | |
1060 | case 'n': | |
1061 | lastp++; | |
1062 | case '/': | |
1063 | if (nlines == 0) nlines++; | |
1064 | kill_line (); | |
1065 | pr ("/"); | |
1066 | promptlen = 1; | |
1067 | fflush (stdout); | |
1068 | if (lastp) { | |
1069 | write (2,"\r", 1); | |
1070 | search (NULL, f, nlines); /* Use previous r.e. */ | |
1071 | } | |
1072 | else { | |
1073 | ttyin (cmdbuf, 78, '/'); | |
1074 | write (2, "\r", 1); | |
1075 | search (cmdbuf, f, nlines); | |
1076 | } | |
38ccf597 | 1077 | ret (dlines-1); |
ffa58356 ES |
1078 | case '!': |
1079 | do_shell (filename); | |
1080 | break; | |
4d242f02 | 1081 | case '?': |
ffa58356 ES |
1082 | case 'h': |
1083 | if ((helpf = fopen (HELPFILE, "r")) == NULL) | |
1084 | error ("Can't open help file"); | |
1085 | if (noscroll) doclear (); | |
1086 | copy_file (helpf); | |
1087 | close (helpf); | |
1088 | prompt (filename); | |
1089 | break; | |
1090 | case 'v': /* This case should go right before default */ | |
1091 | if (!no_intty) { | |
1092 | kill_line (); | |
1093 | cmdbuf[0] = '+'; | |
4d242f02 JB |
1094 | scanstr (Currline - dlines < 0 ? 0 |
1095 | : Currline - (dlines + 1) / 2, &cmdbuf[1]); | |
ffa58356 ES |
1096 | pr ("vi "); pr (cmdbuf); putchar (' '); pr (fnames[fnum]); |
1097 | execute (filename, VI, "vi", cmdbuf, fnames[fnum], 0); | |
1098 | break; | |
1099 | } | |
1100 | default: | |
2c880657 JK |
1101 | if (dum_opt) { |
1102 | kill_line (); | |
1103 | if (Senter && Sexit) { | |
1104 | tputs (Senter, 1, putch); | |
1105 | promptlen = pr ("[Press 'h' for instructions.]") + (2 * soglitch); | |
1106 | tputs (Sexit, 1, putch); | |
1107 | } | |
1108 | else | |
1109 | promptlen = pr ("[Press 'h' for instructions.]"); | |
1110 | fflush (stdout); | |
1111 | } | |
1112 | else | |
1113 | write (2, &bell, 1); | |
ffa58356 ES |
1114 | break; |
1115 | } | |
1116 | if (done) break; | |
1117 | } | |
1118 | putchar ('\r'); | |
1119 | endsw: | |
1120 | inwait = 0; | |
1121 | notell++; | |
1122 | if (MBIT == RAW && slow_tty) { | |
1123 | otty.sg_flags &= ~MBIT; | |
d730d1dc | 1124 | stty(fileno(stderr), &otty); |
ffa58356 ES |
1125 | } |
1126 | return (retval); | |
1127 | } | |
1128 | ||
1129 | char ch; | |
1130 | ||
1131 | /* | |
1132 | * Execute a colon-prefixed command. | |
1133 | * Returns <0 if not a command that should cause | |
1134 | * more of the file to be printed. | |
1135 | */ | |
1136 | ||
1137 | colon (filename, cmd, nlines) | |
1138 | char *filename; | |
1139 | int cmd; | |
1140 | int nlines; | |
1141 | { | |
1142 | if (cmd == 0) | |
1143 | ch = readch (); | |
1144 | else | |
1145 | ch = cmd; | |
1146 | lastcolon = ch; | |
1147 | switch (ch) { | |
1148 | case 'f': | |
1149 | kill_line (); | |
1150 | if (!no_intty) | |
1151 | promptlen = printf ("\"%s\" line %d", fnames[fnum], Currline); | |
1152 | else | |
1153 | promptlen = printf ("[Not a file] line %d", Currline); | |
1154 | fflush (stdout); | |
1155 | return (-1); | |
1156 | case 'n': | |
1157 | if (nlines == 0) { | |
1158 | if (fnum >= nfiles - 1) | |
1159 | end_it (); | |
1160 | nlines++; | |
1161 | } | |
1162 | putchar ('\r'); | |
1163 | erase (0); | |
1164 | skipf (nlines); | |
1165 | return (0); | |
1166 | case 'p': | |
1167 | if (no_intty) { | |
1168 | write (2, &bell, 1); | |
1169 | return (-1); | |
1170 | } | |
1171 | putchar ('\r'); | |
1172 | erase (0); | |
1173 | if (nlines == 0) | |
1174 | nlines++; | |
1175 | skipf (-nlines); | |
1176 | return (0); | |
1177 | case '!': | |
1178 | do_shell (filename); | |
1179 | return (-1); | |
1180 | case 'q': | |
1181 | case 'Q': | |
1182 | end_it (); | |
1183 | default: | |
1184 | write (2, &bell, 1); | |
1185 | return (-1); | |
1186 | } | |
1187 | } | |
1188 | ||
1189 | /* | |
1190 | ** Read a decimal number from the terminal. Set cmd to the non-digit which | |
1191 | ** terminates the number. | |
1192 | */ | |
1193 | ||
1194 | number(cmd) | |
1195 | char *cmd; | |
1196 | { | |
1197 | register int i; | |
1198 | ||
1199 | i = 0; ch = otty.sg_kill; | |
1200 | for (;;) { | |
1201 | ch = readch (); | |
1202 | if (ch >= '0' && ch <= '9') | |
1203 | i = i*10 + ch - '0'; | |
1204 | else if (ch == otty.sg_kill) | |
1205 | i = 0; | |
1206 | else { | |
1207 | *cmd = ch; | |
1208 | break; | |
1209 | } | |
1210 | } | |
1211 | return (i); | |
1212 | } | |
1213 | ||
1214 | do_shell (filename) | |
1215 | char *filename; | |
1216 | { | |
1217 | char cmdbuf[80]; | |
1218 | ||
1219 | kill_line (); | |
1220 | pr ("!"); | |
1221 | fflush (stdout); | |
1222 | promptlen = 1; | |
1223 | if (lastp) | |
1224 | pr (shell_line); | |
1225 | else { | |
1226 | ttyin (cmdbuf, 78, '!'); | |
1227 | if (expand (shell_line, cmdbuf)) { | |
1228 | kill_line (); | |
1229 | promptlen = printf ("!%s", shell_line); | |
1230 | } | |
1231 | } | |
1232 | fflush (stdout); | |
1233 | write (2, "\n", 1); | |
1234 | promptlen = 0; | |
1235 | shellp = 1; | |
1236 | execute (filename, shell, shell, "-c", shell_line, 0); | |
1237 | } | |
1238 | ||
1239 | /* | |
1240 | ** Search for nth ocurrence of regular expression contained in buf in the file | |
1241 | */ | |
1242 | ||
1243 | search (buf, file, n) | |
1244 | char buf[]; | |
1245 | FILE *file; | |
1246 | register int n; | |
1247 | { | |
1248 | long startline = Ftell (file); | |
1249 | register long line1 = startline; | |
1250 | register long line2 = startline; | |
1251 | register long line3 = startline; | |
1252 | register int lncount; | |
1253 | int saveln, rv, re_exec(); | |
1254 | char *s, *re_comp(); | |
1255 | ||
1256 | context.line = saveln = Currline; | |
1257 | context.chrctr = startline; | |
1258 | lncount = 0; | |
1259 | if ((s = re_comp (buf)) != 0) | |
1260 | error (s); | |
1261 | while (!feof (file)) { | |
1262 | line3 = line2; | |
1263 | line2 = line1; | |
1264 | line1 = Ftell (file); | |
1265 | rdline (file); | |
1266 | lncount++; | |
1267 | if ((rv = re_exec (Line)) == 1) | |
1268 | if (--n == 0) { | |
1269 | if (lncount > 3 || (lncount > 1 && no_intty)) | |
38ccf597 BJ |
1270 | { |
1271 | pr ("\n"); | |
35bd36fc BJ |
1272 | if (clreol) |
1273 | cleareol (); | |
38ccf597 BJ |
1274 | pr("...skipping\n"); |
1275 | } | |
ffa58356 ES |
1276 | if (!no_intty) { |
1277 | Currline -= (lncount >= 3 ? 3 : lncount); | |
1278 | Fseek (file, line3); | |
35bd36fc BJ |
1279 | if (noscroll) |
1280 | if (clreol) { | |
1281 | home (); | |
1282 | cleareol (); | |
d730d1dc | 1283 | } |
35bd36fc BJ |
1284 | else |
1285 | doclear (); | |
ffa58356 ES |
1286 | } |
1287 | else { | |
1288 | kill_line (); | |
35bd36fc BJ |
1289 | if (noscroll) |
1290 | if (clreol) { | |
d730d1dc | 1291 | home (); |
35bd36fc | 1292 | cleareol (); |
d730d1dc | 1293 | } |
35bd36fc BJ |
1294 | else |
1295 | doclear (); | |
ffa58356 ES |
1296 | pr (Line); |
1297 | putchar ('\n'); | |
1298 | } | |
1299 | break; | |
1300 | } | |
1301 | else if (rv == -1) | |
1302 | error ("Regular expression botch"); | |
1303 | } | |
1304 | if (feof (file)) { | |
1305 | if (!no_intty) { | |
ffa58356 | 1306 | file->_flag &= ~_IOEOF; /* why doesn't fseek do this ??!!??! */ |
ffa58356 ES |
1307 | Currline = saveln; |
1308 | Fseek (file, startline); | |
1309 | } | |
1310 | else { | |
1311 | pr ("\nPattern not found\n"); | |
1312 | end_it (); | |
1313 | } | |
1314 | error ("Pattern not found"); | |
1315 | } | |
1316 | } | |
1317 | ||
1318 | execute (filename, cmd, args) | |
1319 | char *filename; | |
1320 | char *cmd, *args; | |
1321 | { | |
1322 | int id; | |
2c880657 | 1323 | int n; |
ffa58356 ES |
1324 | |
1325 | fflush (stdout); | |
1326 | reset_tty (); | |
2c880657 | 1327 | for (n = 10; (id = fork ()) < 0 && n > 0; n--) |
ffa58356 ES |
1328 | sleep (5); |
1329 | if (id == 0) { | |
2c880657 JK |
1330 | if (!isatty(0)) { |
1331 | close(0); | |
1332 | open("/dev/tty", 0); | |
1333 | } | |
ffa58356 ES |
1334 | execv (cmd, &args); |
1335 | write (2, "exec failed\n", 12); | |
1336 | exit (1); | |
1337 | } | |
2c880657 JK |
1338 | if (id > 0) { |
1339 | signal (SIGINT, SIG_IGN); | |
1340 | signal (SIGQUIT, SIG_IGN); | |
1341 | if (catch_susp) | |
1342 | signal(SIGTSTP, SIG_DFL); | |
1343 | while (wait(0) > 0); | |
1344 | signal (SIGINT, end_it); | |
1345 | signal (SIGQUIT, onquit); | |
1346 | if (catch_susp) | |
1347 | signal(SIGTSTP, onsusp); | |
1348 | } else | |
1349 | write(2, "can't fork\n", 11); | |
ffa58356 ES |
1350 | set_tty (); |
1351 | pr ("------------------------\n"); | |
1352 | prompt (filename); | |
1353 | } | |
1354 | /* | |
1355 | ** Skip n lines in the file f | |
1356 | */ | |
1357 | ||
1358 | skiplns (n, f) | |
1359 | register int n; | |
1360 | register FILE *f; | |
1361 | { | |
1362 | register char c; | |
1363 | ||
1364 | while (n > 0) { | |
1365 | while ((c = Getc (f)) != '\n') | |
1366 | if (c == EOF) | |
1367 | return; | |
1368 | n--; | |
1369 | Currline++; | |
1370 | } | |
1371 | } | |
1372 | ||
1373 | /* | |
1374 | ** Skip nskip files in the file list (from the command line). Nskip may be | |
1375 | ** negative. | |
1376 | */ | |
1377 | ||
1378 | skipf (nskip) | |
1379 | register int nskip; | |
1380 | { | |
1381 | if (nskip == 0) return; | |
1382 | if (nskip > 0) { | |
1383 | if (fnum + nskip > nfiles - 1) | |
1384 | nskip = nfiles - fnum - 1; | |
1385 | } | |
1386 | else if (within) | |
1387 | ++fnum; | |
1388 | fnum += nskip; | |
1389 | if (fnum < 0) | |
1390 | fnum = 0; | |
35bd36fc | 1391 | pr ("\n...Skipping "); |
38ccf597 | 1392 | pr ("\n"); |
35bd36fc BJ |
1393 | if (clreol) |
1394 | cleareol (); | |
38ccf597 | 1395 | pr ("...Skipping "); |
ffa58356 ES |
1396 | pr (nskip > 0 ? "to file " : "back to file "); |
1397 | pr (fnames[fnum]); | |
38ccf597 | 1398 | pr ("\n"); |
35bd36fc BJ |
1399 | if (clreol) |
1400 | cleareol (); | |
38ccf597 | 1401 | pr ("\n"); |
ffa58356 ES |
1402 | --fnum; |
1403 | } | |
1404 | ||
1405 | /*----------------------------- Terminal I/O -------------------------------*/ | |
1406 | ||
1407 | initterm () | |
1408 | { | |
1409 | char buf[TBUFSIZ]; | |
8cb6d801 | 1410 | static char clearbuf[TBUFSIZ]; |
ffa58356 | 1411 | char *clearptr, *padstr; |
ffa58356 | 1412 | int ldisc; |
4a56d647 | 1413 | int lmode; |
54decef9 | 1414 | char *term; |
d730d1dc | 1415 | int tgrp; |
d3e7b534 | 1416 | struct winsize win; |
ffa58356 | 1417 | |
d730d1dc CL |
1418 | retry: |
1419 | if (!(no_tty = gtty(fileno(stdout), &otty))) { | |
4a56d647 CL |
1420 | if (ioctl(fileno(stdout), TIOCLGET, &lmode) < 0) { |
1421 | perror("TIOCLGET"); | |
1422 | exit(1); | |
1423 | } | |
1424 | docrterase = ((lmode & LCRTERA) != 0); | |
1425 | docrtkill = ((lmode & LCRTKIL) != 0); | |
d730d1dc | 1426 | /* |
4a56d647 CL |
1427 | * Wait until we're in the foreground before we save the |
1428 | * the terminal modes. | |
d730d1dc CL |
1429 | */ |
1430 | if (ioctl(fileno(stdout), TIOCGPGRP, &tgrp) < 0) { | |
4a56d647 | 1431 | perror("TIOCGPGRP"); |
d730d1dc CL |
1432 | exit(1); |
1433 | } | |
1434 | if (tgrp != getpgrp(0)) { | |
1435 | kill(0, SIGTTOU); | |
1436 | goto retry; | |
1437 | } | |
8828eef4 | 1438 | if ((term = getenv("TERM")) == 0 || tgetent(buf, term) <= 0) { |
35bd36fc | 1439 | dumb++; ul_opt = 0; |
ffa58356 ES |
1440 | } |
1441 | else { | |
d3e7b534 JB |
1442 | if (ioctl(fileno(stdout), TIOCGWINSZ, &win) < 0) { |
1443 | Lpp = tgetnum("li"); | |
1444 | Mcol = tgetnum("co"); | |
1445 | } else { | |
1446 | if ((Lpp = win.ws_row) == 0) | |
1447 | Lpp = tgetnum("li"); | |
1448 | if ((Mcol = win.ws_col) == 0) | |
1449 | Mcol = tgetnum("co"); | |
1450 | } | |
1451 | if ((Lpp <= 0) || tgetflag("hc")) { | |
ffa58356 ES |
1452 | hard++; /* Hard copy terminal */ |
1453 | Lpp = 24; | |
1454 | } | |
d3e7b534 JB |
1455 | if (Mcol <= 0) |
1456 | Mcol = 80; | |
1457 | ||
ffa58356 ES |
1458 | if (tailequ (fnames[0], "page") || !hard && tgetflag("ns")) |
1459 | noscroll++; | |
ffa58356 ES |
1460 | Wrap = tgetflag("am"); |
1461 | bad_so = tgetflag ("xs"); | |
1462 | clearptr = clearbuf; | |
1463 | eraseln = tgetstr("ce",&clearptr); | |
1464 | Clear = tgetstr("cl", &clearptr); | |
1465 | Senter = tgetstr("so", &clearptr); | |
1466 | Sexit = tgetstr("se", &clearptr); | |
2c880657 JK |
1467 | if ((soglitch = tgetnum("sg")) < 0) |
1468 | soglitch = 0; | |
35bd36fc BJ |
1469 | |
1470 | /* | |
1471 | * Set up for underlining: some terminals don't need it; | |
1472 | * others have start/stop sequences, still others have an | |
1473 | * underline char sequence which is assumed to move the | |
1474 | * cursor forward one character. If underline sequence | |
1475 | * isn't available, settle for standout sequence. | |
1476 | */ | |
1477 | ||
1478 | if (tgetflag("ul") || tgetflag("os")) | |
1479 | ul_opt = 0; | |
1480 | if ((chUL = tgetstr("uc", &clearptr)) == NULL ) | |
1481 | chUL = ""; | |
2c880657 JK |
1482 | if (((ULenter = tgetstr("us", &clearptr)) == NULL || |
1483 | (ULexit = tgetstr("ue", &clearptr)) == NULL) && !*chUL) { | |
1484 | if ((ULenter = Senter) == NULL || (ULexit = Sexit) == NULL) { | |
1485 | ULenter = ""; | |
1486 | ULexit = ""; | |
1487 | } else | |
1488 | ulglitch = soglitch; | |
1489 | } else { | |
1490 | if ((ulglitch = tgetnum("ug")) < 0) | |
1491 | ulglitch = 0; | |
1492 | } | |
d730d1dc | 1493 | |
ffa58356 ES |
1494 | if (padstr = tgetstr("pc", &clearptr)) |
1495 | PC = *padstr; | |
38ccf597 | 1496 | Home = tgetstr("ho",&clearptr); |
ddbe1116 | 1497 | if (Home == 0 || *Home == '\0') |
38ccf597 | 1498 | { |
35bd36fc BJ |
1499 | if ((cursorm = tgetstr("cm", &clearptr)) != NULL) { |
1500 | strcpy(cursorhome, tgoto(cursorm, 0, 0)); | |
38ccf597 BJ |
1501 | Home = cursorhome; |
1502 | } | |
1503 | } | |
35bd36fc | 1504 | EodClr = tgetstr("cd", &clearptr); |
ffa58356 ES |
1505 | } |
1506 | if ((shell = getenv("SHELL")) == NULL) | |
1507 | shell = "/bin/sh"; | |
1508 | } | |
d730d1dc CL |
1509 | no_intty = gtty(fileno(stdin), &otty); |
1510 | gtty(fileno(stderr), &otty); | |
8828eef4 | 1511 | savetty = otty; |
ffa58356 ES |
1512 | ospeed = otty.sg_ospeed; |
1513 | slow_tty = ospeed < B1200; | |
1514 | hardtabs = !(otty.sg_flags & XTABS); | |
1515 | if (!no_tty) { | |
1516 | otty.sg_flags &= ~ECHO; | |
1517 | if (MBIT == CBREAK || !slow_tty) | |
1518 | otty.sg_flags |= MBIT; | |
1519 | } | |
1520 | } | |
1521 | ||
1522 | readch () | |
1523 | { | |
1524 | char ch; | |
1525 | extern int errno; | |
1526 | ||
1527 | if (read (2, &ch, 1) <= 0) | |
1528 | if (errno != EINTR) | |
1529 | exit(0); | |
1530 | else | |
1531 | ch = otty.sg_kill; | |
1532 | return (ch); | |
1533 | } | |
1534 | ||
1535 | static char BS = '\b'; | |
4a56d647 | 1536 | static char *BSB = "\b \b"; |
ffa58356 | 1537 | static char CARAT = '^'; |
4a56d647 CL |
1538 | #define ERASEONECHAR \ |
1539 | if (docrterase) \ | |
1540 | write (2, BSB, sizeof(BSB)); \ | |
1541 | else \ | |
1542 | write (2, &BS, sizeof(BS)); | |
ffa58356 ES |
1543 | |
1544 | ttyin (buf, nmax, pchar) | |
1545 | char buf[]; | |
1546 | register int nmax; | |
1547 | char pchar; | |
1548 | { | |
1549 | register char *sptr; | |
1550 | register char ch; | |
1551 | register int slash = 0; | |
1552 | int maxlen; | |
1553 | char cbuf; | |
1554 | ||
1555 | sptr = buf; | |
1556 | maxlen = 0; | |
1557 | while (sptr - buf < nmax) { | |
1558 | if (promptlen > maxlen) maxlen = promptlen; | |
1559 | ch = readch (); | |
1560 | if (ch == '\\') { | |
1561 | slash++; | |
1562 | } | |
1563 | else if ((ch == otty.sg_erase) && !slash) { | |
1564 | if (sptr > buf) { | |
1565 | --promptlen; | |
4a56d647 | 1566 | ERASEONECHAR |
ffa58356 ES |
1567 | --sptr; |
1568 | if ((*sptr < ' ' && *sptr != '\n') || *sptr == RUBOUT) { | |
1569 | --promptlen; | |
4a56d647 | 1570 | ERASEONECHAR |
ffa58356 ES |
1571 | } |
1572 | continue; | |
1573 | } | |
1574 | else { | |
1575 | if (!eraseln) promptlen = maxlen; | |
1576 | longjmp (restore, 1); | |
1577 | } | |
1578 | } | |
1579 | else if ((ch == otty.sg_kill) && !slash) { | |
1580 | if (hard) { | |
1581 | show (ch); | |
1582 | putchar ('\n'); | |
1583 | putchar (pchar); | |
1584 | } | |
1585 | else { | |
1586 | putchar ('\r'); | |
1587 | putchar (pchar); | |
1588 | if (eraseln) | |
1589 | erase (1); | |
4a56d647 CL |
1590 | else if (docrtkill) |
1591 | while (promptlen-- > 1) | |
1592 | write (2, BSB, sizeof(BSB)); | |
ffa58356 ES |
1593 | promptlen = 1; |
1594 | } | |
1595 | sptr = buf; | |
1596 | fflush (stdout); | |
1597 | continue; | |
1598 | } | |
1599 | if (slash && (ch == otty.sg_kill || ch == otty.sg_erase)) { | |
4a56d647 | 1600 | ERASEONECHAR |
ffa58356 ES |
1601 | --sptr; |
1602 | } | |
1603 | if (ch != '\\') | |
1604 | slash = 0; | |
1605 | *sptr++ = ch; | |
1606 | if ((ch < ' ' && ch != '\n' && ch != ESC) || ch == RUBOUT) { | |
1607 | ch += ch == RUBOUT ? -0100 : 0100; | |
1608 | write (2, &CARAT, 1); | |
1609 | promptlen++; | |
1610 | } | |
1611 | cbuf = ch; | |
1612 | if (ch != '\n' && ch != ESC) { | |
1613 | write (2, &cbuf, 1); | |
1614 | promptlen++; | |
1615 | } | |
1616 | else | |
1617 | break; | |
1618 | } | |
1619 | *--sptr = '\0'; | |
1620 | if (!eraseln) promptlen = maxlen; | |
1621 | if (sptr - buf >= nmax - 1) | |
1622 | error ("Line too long"); | |
1623 | } | |
1624 | ||
1625 | expand (outbuf, inbuf) | |
1626 | char *outbuf; | |
1627 | char *inbuf; | |
1628 | { | |
1629 | register char *instr; | |
1630 | register char *outstr; | |
1631 | register char ch; | |
1632 | char temp[200]; | |
1633 | int changed = 0; | |
1634 | ||
1635 | instr = inbuf; | |
1636 | outstr = temp; | |
1637 | while ((ch = *instr++) != '\0') | |
1638 | switch (ch) { | |
1639 | case '%': | |
1640 | if (!no_intty) { | |
1641 | strcpy (outstr, fnames[fnum]); | |
1642 | outstr += strlen (fnames[fnum]); | |
1643 | changed++; | |
1644 | } | |
1645 | else | |
1646 | *outstr++ = ch; | |
1647 | break; | |
1648 | case '!': | |
1649 | if (!shellp) | |
1650 | error ("No previous command to substitute for"); | |
1651 | strcpy (outstr, shell_line); | |
1652 | outstr += strlen (shell_line); | |
1653 | changed++; | |
1654 | break; | |
1655 | case '\\': | |
1656 | if (*instr == '%' || *instr == '!') { | |
1657 | *outstr++ = *instr++; | |
1658 | break; | |
1659 | } | |
1660 | default: | |
1661 | *outstr++ = ch; | |
1662 | } | |
1663 | *outstr++ = '\0'; | |
1664 | strcpy (outbuf, temp); | |
1665 | return (changed); | |
1666 | } | |
1667 | ||
1668 | show (ch) | |
1669 | register char ch; | |
1670 | { | |
1671 | char cbuf; | |
1672 | ||
1673 | if ((ch < ' ' && ch != '\n' && ch != ESC) || ch == RUBOUT) { | |
1674 | ch += ch == RUBOUT ? -0100 : 0100; | |
1675 | write (2, &CARAT, 1); | |
1676 | promptlen++; | |
1677 | } | |
1678 | cbuf = ch; | |
1679 | write (2, &cbuf, 1); | |
1680 | promptlen++; | |
1681 | } | |
1682 | ||
1683 | error (mess) | |
1684 | char *mess; | |
1685 | { | |
35bd36fc BJ |
1686 | if (clreol) |
1687 | cleareol (); | |
1688 | else | |
1689 | kill_line (); | |
ffa58356 ES |
1690 | promptlen += strlen (mess); |
1691 | if (Senter && Sexit) { | |
1692 | tputs (Senter, 1, putch); | |
1693 | pr(mess); | |
1694 | tputs (Sexit, 1, putch); | |
1695 | } | |
1696 | else | |
1697 | pr (mess); | |
1698 | fflush(stdout); | |
1699 | errors++; | |
1700 | longjmp (restore, 1); | |
1701 | } | |
1702 | ||
1703 | ||
1704 | set_tty () | |
1705 | { | |
1706 | otty.sg_flags |= MBIT; | |
1707 | otty.sg_flags &= ~ECHO; | |
d730d1dc | 1708 | stty(fileno(stderr), &otty); |
ffa58356 ES |
1709 | } |
1710 | ||
1711 | reset_tty () | |
1712 | { | |
2c880657 JK |
1713 | if (pstate) { |
1714 | tputs(ULexit, 1, putch); | |
1715 | fflush(stdout); | |
1716 | pstate = 0; | |
1717 | } | |
ffa58356 ES |
1718 | otty.sg_flags |= ECHO; |
1719 | otty.sg_flags &= ~MBIT; | |
d730d1dc | 1720 | stty(fileno(stderr), &savetty); |
ffa58356 ES |
1721 | } |
1722 | ||
1723 | rdline (f) | |
1724 | register FILE *f; | |
1725 | { | |
1726 | register char c; | |
1727 | register char *p; | |
1728 | ||
1729 | p = Line; | |
1730 | while ((c = Getc (f)) != '\n' && c != EOF && p - Line < LINSIZ - 1) | |
1731 | *p++ = c; | |
1732 | if (c == '\n') | |
1733 | Currline++; | |
1734 | *p = '\0'; | |
1735 | } | |
1736 | ||
1737 | /* Come here when we get a suspend signal from the terminal */ | |
1738 | ||
ffa58356 ES |
1739 | onsusp () |
1740 | { | |
910bcc08 MK |
1741 | /* ignore SIGTTOU so we don't get stopped if csh grabs the tty */ |
1742 | signal(SIGTTOU, SIG_IGN); | |
ffa58356 ES |
1743 | reset_tty (); |
1744 | fflush (stdout); | |
910bcc08 | 1745 | signal(SIGTTOU, SIG_DFL); |
ffa58356 | 1746 | /* Send the TSTP signal to suspend our process group */ |
2d4fa3b8 SL |
1747 | signal(SIGTSTP, SIG_DFL); |
1748 | sigsetmask(0); | |
ffa58356 ES |
1749 | kill (0, SIGTSTP); |
1750 | /* Pause for station break */ | |
1751 | ||
1752 | /* We're back */ | |
1753 | signal (SIGTSTP, onsusp); | |
1754 | set_tty (); | |
1755 | if (inwait) | |
1756 | longjmp (restore); | |
1757 | } |