Commit | Line | Data |
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8b7ec80f | 1 | #ifndef lint |
2c880657 | 2 | static char *sccsid = "@(#)more.c 4.19 (Berkeley) 84/07/12"; |
8b7ec80f | 3 | #endif |
35bd36fc | 4 | |
ffa58356 ES |
5 | /* |
6 | ** more.c - General purpose tty output filter and file perusal program | |
7 | ** | |
8 | ** by Eric Shienbrood, UC Berkeley | |
35bd36fc BJ |
9 | ** |
10 | ** modified by Geoff Peck, UCB to add underlining, single spacing | |
11 | ** modified by John Foderaro, UCB to add -c and MORE environment variable | |
ffa58356 ES |
12 | */ |
13 | ||
ffa58356 ES |
14 | #include <stdio.h> |
15 | #include <ctype.h> | |
16 | #include <signal.h> | |
17 | #include <errno.h> | |
18 | #include <sgtty.h> | |
19 | #include <setjmp.h> | |
20 | #include <sys/types.h> | |
ffa58356 | 21 | #include <sys/stat.h> |
ffa58356 | 22 | |
8b7ec80f SL |
23 | #define HELPFILE "/usr/lib/more.help" |
24 | #define VI "/usr/ucb/vi" | |
ffa58356 ES |
25 | |
26 | #define Fopen(s,m) (Currline = 0,file_pos=0,fopen(s,m)) | |
27 | #define Ftell(f) file_pos | |
28 | #define Fseek(f,off) (file_pos=off,fseek(f,off,0)) | |
29 | #define Getc(f) (++file_pos, getc(f)) | |
30 | #define Ungetc(c,f) (--file_pos, ungetc(c,f)) | |
31 | ||
ffa58356 ES |
32 | #define MBIT CBREAK |
33 | #define stty(fd,argp) ioctl(fd,TIOCSETN,argp) | |
ffa58356 ES |
34 | |
35 | #define TBUFSIZ 1024 | |
36 | #define LINSIZ 256 | |
37 | #define ctrl(letter) ('letter' & 077) | |
38 | #define RUBOUT '\177' | |
39 | #define ESC '\033' | |
40 | #define QUIT '\034' | |
41 | ||
d730d1dc | 42 | struct sgttyb otty, savetty; |
ffa58356 ES |
43 | long file_pos, file_size; |
44 | int fnum, no_intty, no_tty, slow_tty; | |
45 | int dum_opt, dlines, onquit(), end_it(); | |
ffa58356 | 46 | int onsusp(); |
ffa58356 ES |
47 | int nscroll = 11; /* Number of lines scrolled by 'd' */ |
48 | int fold_opt = 1; /* Fold long lines */ | |
49 | int stop_opt = 1; /* Stop after form feeds */ | |
35bd36fc BJ |
50 | int ssp_opt = 0; /* Suppress white space */ |
51 | int ul_opt = 1; /* Underline as best we can */ | |
ffa58356 ES |
52 | int promptlen; |
53 | int Currline; /* Line we are currently at */ | |
54 | int startup = 1; | |
55 | int firstf = 1; | |
56 | int notell = 1; | |
57 | int bad_so; /* True if overwriting does not turn off standout */ | |
58 | int inwait, Pause, errors; | |
59 | int within; /* true if we are within a file, | |
60 | false if we are between files */ | |
35bd36fc | 61 | int hard, dumb, noscroll, hardtabs, clreol; |
ffa58356 ES |
62 | int catch_susp; /* We should catch the SIGTSTP signal */ |
63 | char **fnames; /* The list of file names */ | |
64 | int nfiles; /* Number of files left to process */ | |
65 | char *shell; /* The name of the shell to use */ | |
66 | int shellp; /* A previous shell command exists */ | |
67 | char ch; | |
68 | jmp_buf restore; | |
69 | char obuf[BUFSIZ]; /* stdout buffer */ | |
70 | char Line[LINSIZ]; /* Line buffer */ | |
71 | int Lpp = 24; /* lines per page */ | |
72 | char *Clear; /* clear screen */ | |
73 | char *eraseln; /* erase line */ | |
74 | char *Senter, *Sexit;/* enter and exit standout mode */ | |
35bd36fc BJ |
75 | char *ULenter, *ULexit; /* enter and exit underline mode */ |
76 | char *chUL; /* underline character */ | |
77 | char *chBS; /* backspace character */ | |
38ccf597 BJ |
78 | char *Home; /* go to home */ |
79 | char *cursorm; /* cursor movement */ | |
80 | char cursorhome[40]; /* contains cursor movement to home */ | |
35bd36fc | 81 | char *EodClr; /* clear rest of screen */ |
ffa58356 ES |
82 | char *tgetstr(); |
83 | int Mcol = 80; /* number of columns */ | |
84 | int Wrap = 1; /* set if automargins */ | |
2c880657 JK |
85 | int soglitch; /* terminal has standout mode glitch */ |
86 | int ulglitch; /* terminal has underline mode glitch */ | |
87 | int pstate = 0; /* current UL state */ | |
ffa58356 | 88 | long fseek(); |
38ccf597 | 89 | char *getenv(); |
ffa58356 ES |
90 | struct { |
91 | long chrctr, line; | |
92 | } context, screen_start; | |
93 | extern char PC; /* pad character */ | |
94 | extern short ospeed; | |
95 | ||
96 | ||
97 | main(argc, argv) | |
98 | int argc; | |
99 | char *argv[]; | |
100 | { | |
101 | register FILE *f; | |
102 | register char *s; | |
103 | register char *p; | |
104 | register char ch; | |
105 | register int left; | |
d730d1dc | 106 | int prnames = 0; |
ffa58356 ES |
107 | int initopt = 0; |
108 | int srchopt = 0; | |
109 | int clearit = 0; | |
110 | int initline; | |
111 | char initbuf[80]; | |
112 | FILE *checkf(); | |
113 | ||
114 | nfiles = argc; | |
115 | fnames = argv; | |
116 | initterm (); | |
88cdaae7 RC |
117 | nscroll = Lpp/2 - 1; |
118 | if (nscroll <= 0) | |
119 | nscroll = 1; | |
38ccf597 | 120 | if(s = getenv("MORE")) argscan(s); |
ffa58356 ES |
121 | while (--nfiles > 0) { |
122 | if ((ch = (*++fnames)[0]) == '-') { | |
38ccf597 | 123 | argscan(*fnames+1); |
ffa58356 ES |
124 | } |
125 | else if (ch == '+') { | |
126 | s = *fnames; | |
127 | if (*++s == '/') { | |
128 | srchopt++; | |
129 | for (++s, p = initbuf; p < initbuf + 79 && *s != '\0';) | |
130 | *p++ = *s++; | |
131 | *p = '\0'; | |
132 | } | |
133 | else { | |
134 | initopt++; | |
135 | for (initline = 0; *s != '\0'; s++) | |
136 | if (isdigit (*s)) | |
137 | initline = initline*10 + *s -'0'; | |
138 | --initline; | |
139 | } | |
140 | } | |
141 | else break; | |
142 | } | |
35bd36fc | 143 | /* allow clreol only if Home and eraseln and EodClr strings are |
38ccf597 BJ |
144 | * defined, and in that case, make sure we are in noscroll mode |
145 | */ | |
146 | if(clreol) | |
147 | { | |
35bd36fc BJ |
148 | if ((*Home == '\0') || (*eraseln == '\0') || (*EodClr == '\0')) |
149 | clreol = 0; | |
38ccf597 BJ |
150 | else noscroll = 1; |
151 | } | |
152 | ||
ffa58356 ES |
153 | if (dlines == 0) |
154 | dlines = Lpp - (noscroll ? 1 : 2); | |
155 | left = dlines; | |
156 | if (nfiles > 1) | |
157 | prnames++; | |
158 | if (!no_intty && nfiles == 0) { | |
159 | fputs("Usage: ",stderr); | |
160 | fputs(argv[0],stderr); | |
161 | fputs(" [-dfln] [+linenum | +/pattern] name1 name2 ...\n",stderr); | |
162 | exit(1); | |
163 | } | |
164 | else | |
165 | f = stdin; | |
166 | if (!no_tty) { | |
167 | signal(SIGQUIT, onquit); | |
168 | signal(SIGINT, end_it); | |
ffa58356 ES |
169 | if (signal (SIGTSTP, SIG_IGN) == SIG_DFL) { |
170 | signal(SIGTSTP, onsusp); | |
171 | catch_susp++; | |
172 | } | |
d730d1dc | 173 | stty (fileno(stderr), &otty); |
ffa58356 ES |
174 | } |
175 | if (no_intty) { | |
176 | if (no_tty) | |
177 | copy_file (stdin); | |
178 | else { | |
179 | if ((ch = Getc (f)) == '\f') | |
35bd36fc | 180 | doclear(); |
ffa58356 ES |
181 | else { |
182 | Ungetc (ch, f); | |
35bd36fc BJ |
183 | if (noscroll && (ch != EOF)) { |
184 | if (clreol) | |
185 | home (); | |
186 | else | |
187 | doclear (); | |
38ccf597 | 188 | } |
ffa58356 ES |
189 | } |
190 | if (srchopt) | |
38ccf597 | 191 | { |
ffa58356 | 192 | search (initbuf, stdin, 1); |
35bd36fc BJ |
193 | if (noscroll) |
194 | left--; | |
38ccf597 | 195 | } |
ffa58356 ES |
196 | else if (initopt) |
197 | skiplns (initline, stdin); | |
198 | screen (stdin, left); | |
199 | } | |
200 | no_intty = 0; | |
201 | prnames++; | |
202 | firstf = 0; | |
203 | } | |
204 | ||
205 | while (fnum < nfiles) { | |
206 | if ((f = checkf (fnames[fnum], &clearit)) != NULL) { | |
207 | context.line = context.chrctr = 0; | |
208 | Currline = 0; | |
209 | if (firstf) setjmp (restore); | |
210 | if (firstf) { | |
211 | firstf = 0; | |
212 | if (srchopt) | |
38ccf597 | 213 | { |
ffa58356 | 214 | search (initbuf, f, 1); |
35bd36fc BJ |
215 | if (noscroll) |
216 | left--; | |
38ccf597 | 217 | } |
ffa58356 ES |
218 | else if (initopt) |
219 | skiplns (initline, f); | |
220 | } | |
221 | else if (fnum < nfiles && !no_tty) { | |
222 | setjmp (restore); | |
223 | left = command (fnames[fnum], f); | |
224 | } | |
225 | if (left != 0) { | |
35bd36fc BJ |
226 | if ((noscroll || clearit) && (file_size != 0x7fffffffffffffffL)) |
227 | if (clreol) | |
228 | home (); | |
229 | else | |
230 | doclear (); | |
ffa58356 ES |
231 | if (prnames) { |
232 | if (bad_so) | |
233 | erase (0); | |
35bd36fc BJ |
234 | if (clreol) |
235 | cleareol (); | |
ffa58356 ES |
236 | pr("::::::::::::::"); |
237 | if (promptlen > 14) | |
238 | erase (14); | |
38ccf597 BJ |
239 | printf ("\n"); |
240 | if(clreol) cleareol(); | |
241 | printf("%s\n", fnames[fnum]); | |
242 | if(clreol) cleareol(); | |
243 | printf("::::::::::::::\n", fnames[fnum]); | |
ffa58356 ES |
244 | if (left > Lpp - 4) |
245 | left = Lpp - 4; | |
246 | } | |
247 | if (no_tty) | |
248 | copy_file (f); | |
249 | else { | |
250 | within++; | |
251 | screen(f, left); | |
252 | within = 0; | |
253 | } | |
254 | } | |
255 | setjmp (restore); | |
256 | fflush(stdout); | |
257 | fclose(f); | |
258 | screen_start.line = screen_start.chrctr = 0L; | |
259 | context.line = context.chrctr = 0L; | |
260 | } | |
261 | fnum++; | |
262 | firstf = 0; | |
263 | } | |
264 | reset_tty (); | |
265 | exit(0); | |
266 | } | |
267 | ||
38ccf597 BJ |
268 | argscan(s) |
269 | char *s; | |
270 | { | |
718f6e88 KL |
271 | for (dlines = 0; *s != '\0'; s++) |
272 | { | |
273 | switch (*s) | |
274 | { | |
275 | case '0': case '1': case '2': | |
276 | case '3': case '4': case '5': | |
277 | case '6': case '7': case '8': | |
278 | case '9': | |
279 | dlines = dlines*10 + *s - '0'; | |
280 | break; | |
281 | case 'd': | |
282 | dum_opt = 1; | |
283 | break; | |
284 | case 'l': | |
285 | stop_opt = 0; | |
286 | break; | |
287 | case 'f': | |
288 | fold_opt = 0; | |
289 | break; | |
290 | case 'p': | |
291 | noscroll++; | |
292 | break; | |
293 | case 'c': | |
294 | clreol++; | |
295 | break; | |
296 | case 's': | |
297 | ssp_opt = 1; | |
298 | break; | |
299 | case 'u': | |
300 | ul_opt = 0; | |
301 | break; | |
302 | } | |
303 | } | |
38ccf597 BJ |
304 | } |
305 | ||
306 | ||
ffa58356 ES |
307 | /* |
308 | ** Check whether the file named by fs is an ASCII file which the user may | |
309 | ** access. If it is, return the opened file. Otherwise return NULL. | |
310 | */ | |
311 | ||
312 | FILE * | |
313 | checkf (fs, clearfirst) | |
314 | register char *fs; | |
315 | int *clearfirst; | |
316 | { | |
317 | struct stat stbuf; | |
318 | register FILE *f; | |
319 | char c; | |
320 | ||
321 | if (stat (fs, &stbuf) == -1) { | |
322 | fflush(stdout); | |
35bd36fc BJ |
323 | if (clreol) |
324 | cleareol (); | |
ffa58356 ES |
325 | perror(fs); |
326 | return (NULL); | |
327 | } | |
328 | if ((stbuf.st_mode & S_IFMT) == S_IFDIR) { | |
329 | printf("\n*** %s: directory ***\n\n", fs); | |
330 | return (NULL); | |
331 | } | |
332 | if ((f=Fopen(fs, "r")) == NULL) { | |
333 | fflush(stdout); | |
334 | perror(fs); | |
335 | return (NULL); | |
336 | } | |
337 | c = Getc(f); | |
338 | ||
339 | /* Try to see whether it is an ASCII file */ | |
340 | ||
341 | switch ((c | *f->_ptr << 8) & 0177777) { | |
342 | case 0405: | |
343 | case 0407: | |
344 | case 0410: | |
345 | case 0411: | |
346 | case 0413: | |
347 | case 0177545: | |
348 | printf("\n******** %s: Not a text file ********\n\n", fs); | |
349 | fclose (f); | |
350 | return (NULL); | |
351 | default: | |
352 | break; | |
353 | } | |
354 | if (c == '\f') | |
355 | *clearfirst = 1; | |
356 | else { | |
357 | *clearfirst = 0; | |
358 | Ungetc (c, f); | |
359 | } | |
360 | if ((file_size = stbuf.st_size) == 0) | |
361 | file_size = 0x7fffffffffffffffL; | |
362 | return (f); | |
363 | } | |
364 | ||
365 | /* | |
366 | ** A real function, for the tputs routine in termlib | |
367 | */ | |
368 | ||
369 | putch (ch) | |
370 | char ch; | |
371 | { | |
372 | putchar (ch); | |
373 | } | |
374 | ||
375 | /* | |
376 | ** Print out the contents of the file f, one screenful at a time. | |
377 | */ | |
378 | ||
379 | #define STOP -10 | |
380 | ||
381 | screen (f, num_lines) | |
382 | register FILE *f; | |
383 | register int num_lines; | |
384 | { | |
385 | register int c; | |
386 | register int nchars; | |
35bd36fc BJ |
387 | int length; /* length of current line */ |
388 | static int prev_len = 1; /* length of previous line */ | |
ffa58356 ES |
389 | |
390 | for (;;) { | |
391 | while (num_lines > 0 && !Pause) { | |
392 | if ((nchars = getline (f, &length)) == EOF) | |
38ccf597 | 393 | { |
35bd36fc BJ |
394 | if (clreol) |
395 | clreos(); | |
ffa58356 | 396 | return; |
38ccf597 | 397 | } |
35bd36fc BJ |
398 | if (ssp_opt && length == 0 && prev_len == 0) |
399 | continue; | |
400 | prev_len = length; | |
ffa58356 ES |
401 | if (bad_so || (Senter && *Senter == ' ') && promptlen > 0) |
402 | erase (0); | |
35bd36fc BJ |
403 | /* must clear before drawing line since tabs on some terminals |
404 | * do not erase what they tab over. | |
405 | */ | |
406 | if (clreol) | |
407 | cleareol (); | |
ffa58356 ES |
408 | prbuf (Line, length); |
409 | if (nchars < promptlen) | |
410 | erase (nchars); /* erase () sets promptlen to 0 */ | |
411 | else promptlen = 0; | |
35bd36fc BJ |
412 | /* is this needed? |
413 | * if (clreol) | |
414 | * cleareol(); /* must clear again in case we wrapped * | |
415 | */ | |
ffa58356 | 416 | if (nchars < Mcol || !fold_opt) |
2c880657 | 417 | prbuf("\n", 1); /* will turn off UL if necessary */ |
ffa58356 ES |
418 | if (nchars == STOP) |
419 | break; | |
420 | num_lines--; | |
421 | } | |
2c880657 JK |
422 | if (pstate) { |
423 | tputs(ULexit, 1, putch); | |
424 | pstate = 0; | |
425 | } | |
ffa58356 ES |
426 | fflush(stdout); |
427 | if ((c = Getc(f)) == EOF) | |
38ccf597 | 428 | { |
35bd36fc BJ |
429 | if (clreol) |
430 | clreos (); | |
ffa58356 | 431 | return; |
38ccf597 BJ |
432 | } |
433 | ||
35bd36fc BJ |
434 | if (Pause && clreol) |
435 | clreos (); | |
ffa58356 ES |
436 | Ungetc (c, f); |
437 | setjmp (restore); | |
438 | Pause = 0; startup = 0; | |
439 | if ((num_lines = command (NULL, f)) == 0) | |
440 | return; | |
441 | if (hard && promptlen > 0) | |
442 | erase (0); | |
a97c843b | 443 | if (noscroll && num_lines >= dlines) |
d730d1dc | 444 | { |
35bd36fc BJ |
445 | if (clreol) |
446 | home(); | |
447 | else | |
448 | doclear (); | |
38ccf597 | 449 | } |
ffa58356 ES |
450 | screen_start.line = Currline; |
451 | screen_start.chrctr = Ftell (f); | |
452 | } | |
453 | } | |
454 | ||
455 | /* | |
456 | ** Come here if a quit signal is received | |
457 | */ | |
458 | ||
459 | onquit() | |
460 | { | |
461 | signal(SIGQUIT, SIG_IGN); | |
462 | if (!inwait) { | |
463 | putchar ('\n'); | |
464 | if (!startup) { | |
465 | signal(SIGQUIT, onquit); | |
466 | longjmp (restore, 1); | |
467 | } | |
468 | else | |
469 | Pause++; | |
470 | } | |
471 | else if (!dum_opt && notell) { | |
472 | write (2, "[Use q or Q to quit]", 20); | |
473 | promptlen += 20; | |
474 | notell = 0; | |
475 | } | |
476 | signal(SIGQUIT, onquit); | |
477 | } | |
478 | ||
479 | /* | |
480 | ** Clean up terminal state and exit. Also come here if interrupt signal received | |
481 | */ | |
482 | ||
483 | end_it () | |
484 | { | |
485 | ||
486 | reset_tty (); | |
35bd36fc BJ |
487 | if (clreol) { |
488 | putchar ('\r'); | |
489 | clreos (); | |
490 | fflush (stdout); | |
491 | } | |
38ccf597 | 492 | else if (!clreol && (promptlen > 0)) { |
ffa58356 ES |
493 | kill_line (); |
494 | fflush (stdout); | |
495 | } | |
496 | else | |
497 | write (2, "\n", 1); | |
498 | _exit(0); | |
499 | } | |
500 | ||
501 | copy_file(f) | |
502 | register FILE *f; | |
503 | { | |
504 | register int c; | |
505 | ||
506 | while ((c = getc(f)) != EOF) | |
507 | putchar(c); | |
508 | } | |
509 | ||
510 | /* Simplified printf function */ | |
511 | ||
512 | printf (fmt, args) | |
513 | register char *fmt; | |
514 | int args; | |
515 | { | |
516 | register int *argp; | |
517 | register char ch; | |
518 | register int ccount; | |
519 | ||
520 | ccount = 0; | |
521 | argp = &args; | |
522 | while (*fmt) { | |
523 | while ((ch = *fmt++) != '%') { | |
524 | if (ch == '\0') | |
525 | return (ccount); | |
526 | ccount++; | |
527 | putchar (ch); | |
528 | } | |
529 | switch (*fmt++) { | |
530 | case 'd': | |
531 | ccount += printd (*argp); | |
532 | break; | |
533 | case 's': | |
534 | ccount += pr ((char *)*argp); | |
535 | break; | |
536 | case '%': | |
537 | ccount++; | |
538 | argp--; | |
539 | putchar ('%'); | |
540 | break; | |
541 | case '0': | |
542 | return (ccount); | |
543 | default: | |
544 | break; | |
545 | } | |
546 | ++argp; | |
547 | } | |
548 | return (ccount); | |
549 | ||
550 | } | |
551 | ||
552 | /* | |
553 | ** Print an integer as a string of decimal digits, | |
554 | ** returning the length of the print representation. | |
555 | */ | |
556 | ||
557 | printd (n) | |
558 | int n; | |
559 | { | |
560 | int a, nchars; | |
561 | ||
562 | if (a = n/10) | |
563 | nchars = 1 + printd(a); | |
564 | else | |
565 | nchars = 1; | |
566 | putchar (n % 10 + '0'); | |
567 | return (nchars); | |
568 | } | |
569 | ||
570 | /* Put the print representation of an integer into a string */ | |
571 | static char *sptr; | |
572 | ||
573 | scanstr (n, str) | |
574 | int n; | |
575 | char *str; | |
576 | { | |
577 | sptr = str; | |
718f6e88 | 578 | Sprintf (n); |
ffa58356 ES |
579 | *sptr = '\0'; |
580 | } | |
581 | ||
718f6e88 | 582 | Sprintf (n) |
ffa58356 ES |
583 | { |
584 | int a; | |
585 | ||
586 | if (a = n/10) | |
718f6e88 | 587 | Sprintf (a); |
ffa58356 ES |
588 | *sptr++ = n % 10 + '0'; |
589 | } | |
590 | ||
591 | static char bell = ctrl(G); | |
592 | ||
593 | strlen (s) | |
594 | char *s; | |
595 | { | |
596 | register char *p; | |
597 | ||
598 | p = s; | |
599 | while (*p++) | |
600 | ; | |
601 | return (p - s - 1); | |
602 | } | |
603 | ||
604 | /* See whether the last component of the path name "path" is equal to the | |
605 | ** string "string" | |
606 | */ | |
607 | ||
608 | tailequ (path, string) | |
609 | char *path; | |
610 | register char *string; | |
611 | { | |
612 | register char *tail; | |
613 | ||
614 | tail = path + strlen(path); | |
615 | while (tail >= path) | |
616 | if (*(--tail) == '/') | |
617 | break; | |
618 | ++tail; | |
619 | while (*tail++ == *string++) | |
620 | if (*tail == '\0') | |
621 | return(1); | |
622 | return(0); | |
623 | } | |
624 | ||
625 | prompt (filename) | |
626 | char *filename; | |
627 | { | |
35bd36fc BJ |
628 | if (clreol) |
629 | cleareol (); | |
38ccf597 | 630 | else if (promptlen > 0) |
ffa58356 ES |
631 | kill_line (); |
632 | if (!hard) { | |
633 | promptlen = 8; | |
2c880657 | 634 | if (Senter && Sexit) { |
ffa58356 | 635 | tputs (Senter, 1, putch); |
2c880657 JK |
636 | promptlen += (2 * soglitch); |
637 | } | |
35bd36fc BJ |
638 | if (clreol) |
639 | cleareol (); | |
ffa58356 ES |
640 | pr("--More--"); |
641 | if (filename != NULL) { | |
642 | promptlen += printf ("(Next file: %s)", filename); | |
643 | } | |
644 | else if (!no_intty) { | |
645 | promptlen += printf ("(%d%%)", (int)((file_pos * 100) / file_size)); | |
646 | } | |
647 | if (dum_opt) { | |
2c880657 | 648 | promptlen += pr("[Press space to continue, 'q' to quit.]"); |
ffa58356 ES |
649 | } |
650 | if (Senter && Sexit) | |
651 | tputs (Sexit, 1, putch); | |
35bd36fc BJ |
652 | if (clreol) |
653 | clreos (); | |
ffa58356 ES |
654 | fflush(stdout); |
655 | } | |
656 | else | |
657 | write (2, &bell, 1); | |
658 | inwait++; | |
659 | } | |
660 | ||
661 | /* | |
662 | ** Get a logical line | |
663 | */ | |
664 | ||
665 | getline(f, length) | |
666 | register FILE *f; | |
667 | int *length; | |
668 | { | |
669 | register int c; | |
670 | register char *p; | |
671 | register int column; | |
672 | static int colflg; | |
673 | ||
674 | p = Line; | |
675 | column = 0; | |
676 | c = Getc (f); | |
677 | if (colflg && c == '\n') { | |
678 | Currline++; | |
679 | c = Getc (f); | |
680 | } | |
681 | while (p < &Line[LINSIZ - 1]) { | |
682 | if (c == EOF) { | |
683 | if (p > Line) { | |
684 | *p = '\0'; | |
685 | *length = p - Line; | |
686 | return (column); | |
687 | } | |
688 | *length = p - Line; | |
689 | return (EOF); | |
690 | } | |
691 | if (c == '\n') { | |
692 | Currline++; | |
693 | break; | |
694 | } | |
695 | *p++ = c; | |
696 | if (c == '\t') | |
697 | if (hardtabs && column < promptlen && !hard) { | |
698 | if (eraseln && !dumb) { | |
699 | column = 1 + (column | 7); | |
700 | tputs (eraseln, 1, putch); | |
701 | promptlen = 0; | |
702 | } | |
703 | else { | |
704 | for (--p; column & 7 && p < &Line[LINSIZ - 1]; column++) { | |
705 | *p++ = ' '; | |
706 | } | |
707 | if (column >= promptlen) promptlen = 0; | |
708 | } | |
709 | } | |
710 | else | |
711 | column = 1 + (column | 7); | |
d1b174c2 | 712 | else if (c == '\b' && column > 0) |
ffa58356 ES |
713 | column--; |
714 | else if (c == '\r') | |
715 | column = 0; | |
716 | else if (c == '\f' && stop_opt) { | |
717 | p[-1] = '^'; | |
718 | *p++ = 'L'; | |
719 | column += 2; | |
720 | Pause++; | |
721 | } | |
722 | else if (c == EOF) { | |
723 | *length = p - Line; | |
724 | return (column); | |
725 | } | |
726 | else if (c >= ' ' && c != RUBOUT) | |
727 | column++; | |
728 | if (column >= Mcol && fold_opt) break; | |
729 | c = Getc (f); | |
730 | } | |
731 | if (column >= Mcol && Mcol > 0) { | |
732 | if (!Wrap) { | |
733 | *p++ = '\n'; | |
734 | } | |
735 | } | |
736 | colflg = column == Mcol && fold_opt; | |
737 | *length = p - Line; | |
738 | *p = 0; | |
739 | return (column); | |
740 | } | |
741 | ||
742 | /* | |
743 | ** Erase the rest of the prompt, assuming we are starting at column col. | |
744 | */ | |
745 | ||
746 | erase (col) | |
747 | register int col; | |
748 | { | |
749 | ||
750 | if (promptlen == 0) | |
751 | return; | |
752 | if (hard) { | |
753 | putchar ('\n'); | |
754 | } | |
755 | else { | |
756 | if (col == 0) | |
757 | putchar ('\r'); | |
758 | if (!dumb && eraseln) | |
759 | tputs (eraseln, 1, putch); | |
760 | else | |
761 | for (col = promptlen - col; col > 0; col--) | |
762 | putchar (' '); | |
763 | } | |
764 | promptlen = 0; | |
765 | } | |
766 | ||
767 | /* | |
768 | ** Erase the current line entirely | |
769 | */ | |
770 | ||
771 | kill_line () | |
772 | { | |
773 | erase (0); | |
774 | if (!eraseln || dumb) putchar ('\r'); | |
775 | } | |
776 | ||
38ccf597 BJ |
777 | /* |
778 | * force clear to end of line | |
779 | */ | |
780 | cleareol() | |
781 | { | |
35bd36fc | 782 | tputs(eraseln, 1, putch); |
38ccf597 BJ |
783 | } |
784 | ||
35bd36fc | 785 | clreos() |
38ccf597 | 786 | { |
35bd36fc | 787 | tputs(EodClr, 1, putch); |
38ccf597 BJ |
788 | } |
789 | ||
ffa58356 ES |
790 | /* |
791 | ** Print string and return number of characters | |
792 | */ | |
793 | ||
794 | pr(s1) | |
795 | char *s1; | |
796 | { | |
797 | register char *s; | |
798 | register char c; | |
799 | ||
800 | for (s = s1; c = *s++; ) | |
801 | putchar(c); | |
802 | return (s - s1 - 1); | |
803 | } | |
804 | ||
805 | ||
806 | /* Print a buffer of n characters */ | |
807 | ||
808 | prbuf (s, n) | |
809 | register char *s; | |
810 | register int n; | |
811 | { | |
2c880657 | 812 | register char c; /* next output character */ |
35bd36fc | 813 | register int state; /* next output char's UL state */ |
2c880657 | 814 | #define wouldul(s,n) ((n) >= 2 && (((s)[0] == '_' && (s)[1] == '\b') || ((s)[1] == '\b' && (s)[2] == '_'))) |
35bd36fc BJ |
815 | |
816 | while (--n >= 0) | |
817 | if (!ul_opt) | |
818 | putchar (*s++); | |
819 | else { | |
2c880657 JK |
820 | if (*s == ' ' && pstate == 0 && ulglitch && wouldul(s+1, n-1)) { |
821 | s++; | |
822 | continue; | |
823 | } | |
824 | if (state = wouldul(s, n)) { | |
825 | c = (*s == '_')? s[2] : *s ; | |
35bd36fc | 826 | n -= 2; |
2c880657 JK |
827 | s += 3; |
828 | } else | |
35bd36fc | 829 | c = *s++; |
2c880657 JK |
830 | if (state != pstate) { |
831 | if (c == ' ' && state == 0 && ulglitch && wouldul(s, n-1)) | |
832 | state = 1; | |
833 | else | |
834 | tputs(state ? ULenter : ULexit, 1, putch); | |
35bd36fc | 835 | } |
2c880657 JK |
836 | if (c != ' ' || pstate == 0 || state != 0 || ulglitch == 0) |
837 | putchar(c); | |
35bd36fc BJ |
838 | if (state && *chUL) { |
839 | pr(chBS); | |
840 | tputs(chUL, 1, putch); | |
841 | } | |
2c880657 | 842 | pstate = state; |
35bd36fc | 843 | } |
ffa58356 ES |
844 | } |
845 | ||
846 | /* | |
847 | ** Clear the screen | |
848 | */ | |
849 | ||
850 | doclear() | |
851 | { | |
852 | if (Clear && !hard) { | |
853 | tputs(Clear, 1, putch); | |
854 | ||
855 | /* Put out carriage return so that system doesn't | |
856 | ** get confused by escape sequences when expanding tabs | |
857 | */ | |
858 | putchar ('\r'); | |
859 | promptlen = 0; | |
860 | } | |
861 | } | |
862 | ||
38ccf597 BJ |
863 | /* |
864 | * Go to home position | |
865 | */ | |
866 | home() | |
867 | { | |
868 | tputs(Home,1,putch); | |
869 | } | |
870 | ||
ffa58356 ES |
871 | static int lastcmd, lastarg, lastp; |
872 | static int lastcolon; | |
873 | char shell_line[132]; | |
874 | ||
875 | /* | |
876 | ** Read a command and do it. A command consists of an optional integer | |
877 | ** argument followed by the command character. Return the number of lines | |
878 | ** to display in the next screenful. If there is nothing more to display | |
879 | ** in the current file, zero is returned. | |
880 | */ | |
881 | ||
882 | command (filename, f) | |
883 | char *filename; | |
884 | register FILE *f; | |
885 | { | |
886 | register int nlines; | |
887 | register int retval; | |
888 | register char c; | |
889 | char colonch; | |
890 | FILE *helpf; | |
891 | int done; | |
892 | char comchar, cmdbuf[80], *p; | |
893 | ||
894 | #define ret(val) retval=val;done++;break | |
895 | ||
896 | done = 0; | |
897 | if (!errors) | |
898 | prompt (filename); | |
899 | else | |
900 | errors = 0; | |
901 | if (MBIT == RAW && slow_tty) { | |
902 | otty.sg_flags |= MBIT; | |
d730d1dc | 903 | stty(fileno(stderr), &otty); |
ffa58356 ES |
904 | } |
905 | for (;;) { | |
906 | nlines = number (&comchar); | |
907 | lastp = colonch = 0; | |
908 | if (comchar == '.') { /* Repeat last command */ | |
909 | lastp++; | |
910 | comchar = lastcmd; | |
911 | nlines = lastarg; | |
912 | if (lastcmd == ':') | |
913 | colonch = lastcolon; | |
914 | } | |
915 | lastcmd = comchar; | |
916 | lastarg = nlines; | |
917 | if (comchar == otty.sg_erase) { | |
918 | kill_line (); | |
919 | prompt (filename); | |
920 | continue; | |
921 | } | |
922 | switch (comchar) { | |
923 | case ':': | |
924 | retval = colon (filename, colonch, nlines); | |
925 | if (retval >= 0) | |
926 | done++; | |
927 | break; | |
928 | case ' ': | |
929 | case 'z': | |
930 | if (nlines == 0) nlines = dlines; | |
931 | else if (comchar == 'z') dlines = nlines; | |
932 | ret (nlines); | |
933 | case 'd': | |
934 | case ctrl(D): | |
935 | if (nlines != 0) nscroll = nlines; | |
936 | ret (nscroll); | |
937 | case RUBOUT: | |
938 | case 'q': | |
939 | case 'Q': | |
940 | end_it (); | |
941 | case 's': | |
942 | case 'f': | |
943 | if (nlines == 0) nlines++; | |
944 | if (comchar == 'f') | |
945 | nlines *= dlines; | |
946 | putchar ('\r'); | |
947 | erase (0); | |
35bd36fc BJ |
948 | printf ("\n"); |
949 | if (clreol) | |
950 | cleareol (); | |
951 | printf ("...skipping %d line", nlines); | |
ffa58356 | 952 | if (nlines > 1) |
35bd36fc | 953 | pr ("s\n"); |
ffa58356 | 954 | else |
35bd36fc BJ |
955 | pr ("\n"); |
956 | ||
957 | if (clreol) | |
958 | cleareol (); | |
959 | pr ("\n"); | |
960 | ||
ffa58356 ES |
961 | while (nlines > 0) { |
962 | while ((c = Getc (f)) != '\n') | |
963 | if (c == EOF) { | |
964 | retval = 0; | |
965 | done++; | |
966 | goto endsw; | |
967 | } | |
968 | Currline++; | |
969 | nlines--; | |
970 | } | |
971 | ret (dlines); | |
972 | case '\n': | |
973 | if (nlines != 0) | |
974 | dlines = nlines; | |
975 | else | |
976 | nlines = 1; | |
977 | ret (nlines); | |
978 | case '\f': | |
979 | if (!no_intty) { | |
980 | doclear (); | |
981 | Fseek (f, screen_start.chrctr); | |
982 | Currline = screen_start.line; | |
983 | ret (dlines); | |
984 | } | |
985 | else { | |
986 | write (2, &bell, 1); | |
987 | break; | |
988 | } | |
989 | case '\'': | |
990 | if (!no_intty) { | |
991 | kill_line (); | |
992 | pr ("\n***Back***\n\n"); | |
993 | Fseek (f, context.chrctr); | |
994 | Currline = context.line; | |
995 | ret (dlines); | |
996 | } | |
997 | else { | |
998 | write (2, &bell, 1); | |
999 | break; | |
1000 | } | |
1001 | case '=': | |
1002 | kill_line (); | |
1003 | promptlen = printd (Currline); | |
1004 | fflush (stdout); | |
1005 | break; | |
1006 | case 'n': | |
1007 | lastp++; | |
1008 | case '/': | |
1009 | if (nlines == 0) nlines++; | |
1010 | kill_line (); | |
1011 | pr ("/"); | |
1012 | promptlen = 1; | |
1013 | fflush (stdout); | |
1014 | if (lastp) { | |
1015 | write (2,"\r", 1); | |
1016 | search (NULL, f, nlines); /* Use previous r.e. */ | |
1017 | } | |
1018 | else { | |
1019 | ttyin (cmdbuf, 78, '/'); | |
1020 | write (2, "\r", 1); | |
1021 | search (cmdbuf, f, nlines); | |
1022 | } | |
38ccf597 | 1023 | ret (dlines-1); |
ffa58356 ES |
1024 | case '!': |
1025 | do_shell (filename); | |
1026 | break; | |
1027 | case 'h': | |
1028 | if ((helpf = fopen (HELPFILE, "r")) == NULL) | |
1029 | error ("Can't open help file"); | |
1030 | if (noscroll) doclear (); | |
1031 | copy_file (helpf); | |
1032 | close (helpf); | |
1033 | prompt (filename); | |
1034 | break; | |
1035 | case 'v': /* This case should go right before default */ | |
1036 | if (!no_intty) { | |
1037 | kill_line (); | |
1038 | cmdbuf[0] = '+'; | |
1039 | scanstr (Currline, &cmdbuf[1]); | |
1040 | pr ("vi "); pr (cmdbuf); putchar (' '); pr (fnames[fnum]); | |
1041 | execute (filename, VI, "vi", cmdbuf, fnames[fnum], 0); | |
1042 | break; | |
1043 | } | |
1044 | default: | |
2c880657 JK |
1045 | if (dum_opt) { |
1046 | kill_line (); | |
1047 | if (Senter && Sexit) { | |
1048 | tputs (Senter, 1, putch); | |
1049 | promptlen = pr ("[Press 'h' for instructions.]") + (2 * soglitch); | |
1050 | tputs (Sexit, 1, putch); | |
1051 | } | |
1052 | else | |
1053 | promptlen = pr ("[Press 'h' for instructions.]"); | |
1054 | fflush (stdout); | |
1055 | } | |
1056 | else | |
1057 | write (2, &bell, 1); | |
ffa58356 ES |
1058 | break; |
1059 | } | |
1060 | if (done) break; | |
1061 | } | |
1062 | putchar ('\r'); | |
1063 | endsw: | |
1064 | inwait = 0; | |
1065 | notell++; | |
1066 | if (MBIT == RAW && slow_tty) { | |
1067 | otty.sg_flags &= ~MBIT; | |
d730d1dc | 1068 | stty(fileno(stderr), &otty); |
ffa58356 ES |
1069 | } |
1070 | return (retval); | |
1071 | } | |
1072 | ||
1073 | char ch; | |
1074 | ||
1075 | /* | |
1076 | * Execute a colon-prefixed command. | |
1077 | * Returns <0 if not a command that should cause | |
1078 | * more of the file to be printed. | |
1079 | */ | |
1080 | ||
1081 | colon (filename, cmd, nlines) | |
1082 | char *filename; | |
1083 | int cmd; | |
1084 | int nlines; | |
1085 | { | |
1086 | if (cmd == 0) | |
1087 | ch = readch (); | |
1088 | else | |
1089 | ch = cmd; | |
1090 | lastcolon = ch; | |
1091 | switch (ch) { | |
1092 | case 'f': | |
1093 | kill_line (); | |
1094 | if (!no_intty) | |
1095 | promptlen = printf ("\"%s\" line %d", fnames[fnum], Currline); | |
1096 | else | |
1097 | promptlen = printf ("[Not a file] line %d", Currline); | |
1098 | fflush (stdout); | |
1099 | return (-1); | |
1100 | case 'n': | |
1101 | if (nlines == 0) { | |
1102 | if (fnum >= nfiles - 1) | |
1103 | end_it (); | |
1104 | nlines++; | |
1105 | } | |
1106 | putchar ('\r'); | |
1107 | erase (0); | |
1108 | skipf (nlines); | |
1109 | return (0); | |
1110 | case 'p': | |
1111 | if (no_intty) { | |
1112 | write (2, &bell, 1); | |
1113 | return (-1); | |
1114 | } | |
1115 | putchar ('\r'); | |
1116 | erase (0); | |
1117 | if (nlines == 0) | |
1118 | nlines++; | |
1119 | skipf (-nlines); | |
1120 | return (0); | |
1121 | case '!': | |
1122 | do_shell (filename); | |
1123 | return (-1); | |
1124 | case 'q': | |
1125 | case 'Q': | |
1126 | end_it (); | |
1127 | default: | |
1128 | write (2, &bell, 1); | |
1129 | return (-1); | |
1130 | } | |
1131 | } | |
1132 | ||
1133 | /* | |
1134 | ** Read a decimal number from the terminal. Set cmd to the non-digit which | |
1135 | ** terminates the number. | |
1136 | */ | |
1137 | ||
1138 | number(cmd) | |
1139 | char *cmd; | |
1140 | { | |
1141 | register int i; | |
1142 | ||
1143 | i = 0; ch = otty.sg_kill; | |
1144 | for (;;) { | |
1145 | ch = readch (); | |
1146 | if (ch >= '0' && ch <= '9') | |
1147 | i = i*10 + ch - '0'; | |
1148 | else if (ch == otty.sg_kill) | |
1149 | i = 0; | |
1150 | else { | |
1151 | *cmd = ch; | |
1152 | break; | |
1153 | } | |
1154 | } | |
1155 | return (i); | |
1156 | } | |
1157 | ||
1158 | do_shell (filename) | |
1159 | char *filename; | |
1160 | { | |
1161 | char cmdbuf[80]; | |
1162 | ||
1163 | kill_line (); | |
1164 | pr ("!"); | |
1165 | fflush (stdout); | |
1166 | promptlen = 1; | |
1167 | if (lastp) | |
1168 | pr (shell_line); | |
1169 | else { | |
1170 | ttyin (cmdbuf, 78, '!'); | |
1171 | if (expand (shell_line, cmdbuf)) { | |
1172 | kill_line (); | |
1173 | promptlen = printf ("!%s", shell_line); | |
1174 | } | |
1175 | } | |
1176 | fflush (stdout); | |
1177 | write (2, "\n", 1); | |
1178 | promptlen = 0; | |
1179 | shellp = 1; | |
1180 | execute (filename, shell, shell, "-c", shell_line, 0); | |
1181 | } | |
1182 | ||
1183 | /* | |
1184 | ** Search for nth ocurrence of regular expression contained in buf in the file | |
1185 | */ | |
1186 | ||
1187 | search (buf, file, n) | |
1188 | char buf[]; | |
1189 | FILE *file; | |
1190 | register int n; | |
1191 | { | |
1192 | long startline = Ftell (file); | |
1193 | register long line1 = startline; | |
1194 | register long line2 = startline; | |
1195 | register long line3 = startline; | |
1196 | register int lncount; | |
1197 | int saveln, rv, re_exec(); | |
1198 | char *s, *re_comp(); | |
1199 | ||
1200 | context.line = saveln = Currline; | |
1201 | context.chrctr = startline; | |
1202 | lncount = 0; | |
1203 | if ((s = re_comp (buf)) != 0) | |
1204 | error (s); | |
1205 | while (!feof (file)) { | |
1206 | line3 = line2; | |
1207 | line2 = line1; | |
1208 | line1 = Ftell (file); | |
1209 | rdline (file); | |
1210 | lncount++; | |
1211 | if ((rv = re_exec (Line)) == 1) | |
1212 | if (--n == 0) { | |
1213 | if (lncount > 3 || (lncount > 1 && no_intty)) | |
38ccf597 BJ |
1214 | { |
1215 | pr ("\n"); | |
35bd36fc BJ |
1216 | if (clreol) |
1217 | cleareol (); | |
38ccf597 BJ |
1218 | pr("...skipping\n"); |
1219 | } | |
ffa58356 ES |
1220 | if (!no_intty) { |
1221 | Currline -= (lncount >= 3 ? 3 : lncount); | |
1222 | Fseek (file, line3); | |
35bd36fc BJ |
1223 | if (noscroll) |
1224 | if (clreol) { | |
1225 | home (); | |
1226 | cleareol (); | |
d730d1dc | 1227 | } |
35bd36fc BJ |
1228 | else |
1229 | doclear (); | |
ffa58356 ES |
1230 | } |
1231 | else { | |
1232 | kill_line (); | |
35bd36fc BJ |
1233 | if (noscroll) |
1234 | if (clreol) { | |
d730d1dc | 1235 | home (); |
35bd36fc | 1236 | cleareol (); |
d730d1dc | 1237 | } |
35bd36fc BJ |
1238 | else |
1239 | doclear (); | |
ffa58356 ES |
1240 | pr (Line); |
1241 | putchar ('\n'); | |
1242 | } | |
1243 | break; | |
1244 | } | |
1245 | else if (rv == -1) | |
1246 | error ("Regular expression botch"); | |
1247 | } | |
1248 | if (feof (file)) { | |
1249 | if (!no_intty) { | |
ffa58356 | 1250 | file->_flag &= ~_IOEOF; /* why doesn't fseek do this ??!!??! */ |
ffa58356 ES |
1251 | Currline = saveln; |
1252 | Fseek (file, startline); | |
1253 | } | |
1254 | else { | |
1255 | pr ("\nPattern not found\n"); | |
1256 | end_it (); | |
1257 | } | |
1258 | error ("Pattern not found"); | |
1259 | } | |
1260 | } | |
1261 | ||
1262 | execute (filename, cmd, args) | |
1263 | char *filename; | |
1264 | char *cmd, *args; | |
1265 | { | |
1266 | int id; | |
2c880657 | 1267 | int n; |
ffa58356 ES |
1268 | |
1269 | fflush (stdout); | |
1270 | reset_tty (); | |
2c880657 | 1271 | for (n = 10; (id = fork ()) < 0 && n > 0; n--) |
ffa58356 ES |
1272 | sleep (5); |
1273 | if (id == 0) { | |
2c880657 JK |
1274 | if (!isatty(0)) { |
1275 | close(0); | |
1276 | open("/dev/tty", 0); | |
1277 | } | |
ffa58356 ES |
1278 | execv (cmd, &args); |
1279 | write (2, "exec failed\n", 12); | |
1280 | exit (1); | |
1281 | } | |
2c880657 JK |
1282 | if (id > 0) { |
1283 | signal (SIGINT, SIG_IGN); | |
1284 | signal (SIGQUIT, SIG_IGN); | |
1285 | if (catch_susp) | |
1286 | signal(SIGTSTP, SIG_DFL); | |
1287 | while (wait(0) > 0); | |
1288 | signal (SIGINT, end_it); | |
1289 | signal (SIGQUIT, onquit); | |
1290 | if (catch_susp) | |
1291 | signal(SIGTSTP, onsusp); | |
1292 | } else | |
1293 | write(2, "can't fork\n", 11); | |
ffa58356 ES |
1294 | set_tty (); |
1295 | pr ("------------------------\n"); | |
1296 | prompt (filename); | |
1297 | } | |
1298 | /* | |
1299 | ** Skip n lines in the file f | |
1300 | */ | |
1301 | ||
1302 | skiplns (n, f) | |
1303 | register int n; | |
1304 | register FILE *f; | |
1305 | { | |
1306 | register char c; | |
1307 | ||
1308 | while (n > 0) { | |
1309 | while ((c = Getc (f)) != '\n') | |
1310 | if (c == EOF) | |
1311 | return; | |
1312 | n--; | |
1313 | Currline++; | |
1314 | } | |
1315 | } | |
1316 | ||
1317 | /* | |
1318 | ** Skip nskip files in the file list (from the command line). Nskip may be | |
1319 | ** negative. | |
1320 | */ | |
1321 | ||
1322 | skipf (nskip) | |
1323 | register int nskip; | |
1324 | { | |
1325 | if (nskip == 0) return; | |
1326 | if (nskip > 0) { | |
1327 | if (fnum + nskip > nfiles - 1) | |
1328 | nskip = nfiles - fnum - 1; | |
1329 | } | |
1330 | else if (within) | |
1331 | ++fnum; | |
1332 | fnum += nskip; | |
1333 | if (fnum < 0) | |
1334 | fnum = 0; | |
35bd36fc | 1335 | pr ("\n...Skipping "); |
38ccf597 | 1336 | pr ("\n"); |
35bd36fc BJ |
1337 | if (clreol) |
1338 | cleareol (); | |
38ccf597 | 1339 | pr ("...Skipping "); |
ffa58356 ES |
1340 | pr (nskip > 0 ? "to file " : "back to file "); |
1341 | pr (fnames[fnum]); | |
38ccf597 | 1342 | pr ("\n"); |
35bd36fc BJ |
1343 | if (clreol) |
1344 | cleareol (); | |
38ccf597 | 1345 | pr ("\n"); |
ffa58356 ES |
1346 | --fnum; |
1347 | } | |
1348 | ||
1349 | /*----------------------------- Terminal I/O -------------------------------*/ | |
1350 | ||
1351 | initterm () | |
1352 | { | |
1353 | char buf[TBUFSIZ]; | |
1354 | char clearbuf[100]; | |
1355 | char *clearptr, *padstr; | |
ffa58356 | 1356 | int ldisc; |
54decef9 | 1357 | char *term; |
d730d1dc | 1358 | int tgrp; |
ffa58356 ES |
1359 | |
1360 | setbuf(stdout, obuf); | |
d730d1dc CL |
1361 | retry: |
1362 | if (!(no_tty = gtty(fileno(stdout), &otty))) { | |
1363 | /* | |
1364 | * Wait until we're in the foreground before we get the | |
1365 | * save the terminal modes. | |
1366 | */ | |
1367 | if (ioctl(fileno(stdout), TIOCGPGRP, &tgrp) < 0) { | |
1368 | perror("ioctl"); | |
1369 | exit(1); | |
1370 | } | |
1371 | if (tgrp != getpgrp(0)) { | |
1372 | kill(0, SIGTTOU); | |
1373 | goto retry; | |
1374 | } | |
8828eef4 | 1375 | if ((term = getenv("TERM")) == 0 || tgetent(buf, term) <= 0) { |
35bd36fc | 1376 | dumb++; ul_opt = 0; |
ffa58356 ES |
1377 | } |
1378 | else { | |
1379 | if (((Lpp = tgetnum("li")) < 0) || tgetflag("hc")) { | |
1380 | hard++; /* Hard copy terminal */ | |
1381 | Lpp = 24; | |
1382 | } | |
1383 | if (tailequ (fnames[0], "page") || !hard && tgetflag("ns")) | |
1384 | noscroll++; | |
1385 | if ((Mcol = tgetnum("co")) < 0) | |
1386 | Mcol = 80; | |
1387 | Wrap = tgetflag("am"); | |
1388 | bad_so = tgetflag ("xs"); | |
1389 | clearptr = clearbuf; | |
1390 | eraseln = tgetstr("ce",&clearptr); | |
1391 | Clear = tgetstr("cl", &clearptr); | |
1392 | Senter = tgetstr("so", &clearptr); | |
1393 | Sexit = tgetstr("se", &clearptr); | |
2c880657 JK |
1394 | if ((soglitch = tgetnum("sg")) < 0) |
1395 | soglitch = 0; | |
35bd36fc BJ |
1396 | |
1397 | /* | |
1398 | * Set up for underlining: some terminals don't need it; | |
1399 | * others have start/stop sequences, still others have an | |
1400 | * underline char sequence which is assumed to move the | |
1401 | * cursor forward one character. If underline sequence | |
1402 | * isn't available, settle for standout sequence. | |
1403 | */ | |
1404 | ||
1405 | if (tgetflag("ul") || tgetflag("os")) | |
1406 | ul_opt = 0; | |
1407 | if ((chUL = tgetstr("uc", &clearptr)) == NULL ) | |
1408 | chUL = ""; | |
2c880657 JK |
1409 | if (((ULenter = tgetstr("us", &clearptr)) == NULL || |
1410 | (ULexit = tgetstr("ue", &clearptr)) == NULL) && !*chUL) { | |
1411 | if ((ULenter = Senter) == NULL || (ULexit = Sexit) == NULL) { | |
1412 | ULenter = ""; | |
1413 | ULexit = ""; | |
1414 | } else | |
1415 | ulglitch = soglitch; | |
1416 | } else { | |
1417 | if ((ulglitch = tgetnum("ug")) < 0) | |
1418 | ulglitch = 0; | |
1419 | } | |
d730d1dc | 1420 | |
ffa58356 ES |
1421 | if (padstr = tgetstr("pc", &clearptr)) |
1422 | PC = *padstr; | |
38ccf597 | 1423 | Home = tgetstr("ho",&clearptr); |
ddbe1116 | 1424 | if (Home == 0 || *Home == '\0') |
38ccf597 | 1425 | { |
35bd36fc BJ |
1426 | if ((cursorm = tgetstr("cm", &clearptr)) != NULL) { |
1427 | strcpy(cursorhome, tgoto(cursorm, 0, 0)); | |
38ccf597 BJ |
1428 | Home = cursorhome; |
1429 | } | |
1430 | } | |
35bd36fc | 1431 | EodClr = tgetstr("cd", &clearptr); |
ffa58356 ES |
1432 | } |
1433 | if ((shell = getenv("SHELL")) == NULL) | |
1434 | shell = "/bin/sh"; | |
1435 | } | |
d730d1dc CL |
1436 | no_intty = gtty(fileno(stdin), &otty); |
1437 | gtty(fileno(stderr), &otty); | |
8828eef4 | 1438 | savetty = otty; |
ffa58356 ES |
1439 | ospeed = otty.sg_ospeed; |
1440 | slow_tty = ospeed < B1200; | |
1441 | hardtabs = !(otty.sg_flags & XTABS); | |
1442 | if (!no_tty) { | |
1443 | otty.sg_flags &= ~ECHO; | |
1444 | if (MBIT == CBREAK || !slow_tty) | |
1445 | otty.sg_flags |= MBIT; | |
1446 | } | |
1447 | } | |
1448 | ||
1449 | readch () | |
1450 | { | |
1451 | char ch; | |
1452 | extern int errno; | |
1453 | ||
1454 | if (read (2, &ch, 1) <= 0) | |
1455 | if (errno != EINTR) | |
1456 | exit(0); | |
1457 | else | |
1458 | ch = otty.sg_kill; | |
1459 | return (ch); | |
1460 | } | |
1461 | ||
1462 | static char BS = '\b'; | |
1463 | static char CARAT = '^'; | |
1464 | ||
1465 | ttyin (buf, nmax, pchar) | |
1466 | char buf[]; | |
1467 | register int nmax; | |
1468 | char pchar; | |
1469 | { | |
1470 | register char *sptr; | |
1471 | register char ch; | |
1472 | register int slash = 0; | |
1473 | int maxlen; | |
1474 | char cbuf; | |
1475 | ||
1476 | sptr = buf; | |
1477 | maxlen = 0; | |
1478 | while (sptr - buf < nmax) { | |
1479 | if (promptlen > maxlen) maxlen = promptlen; | |
1480 | ch = readch (); | |
1481 | if (ch == '\\') { | |
1482 | slash++; | |
1483 | } | |
1484 | else if ((ch == otty.sg_erase) && !slash) { | |
1485 | if (sptr > buf) { | |
1486 | --promptlen; | |
1487 | write (2, &BS, 1); | |
1488 | --sptr; | |
1489 | if ((*sptr < ' ' && *sptr != '\n') || *sptr == RUBOUT) { | |
1490 | --promptlen; | |
1491 | write (2, &BS, 1); | |
1492 | } | |
1493 | continue; | |
1494 | } | |
1495 | else { | |
1496 | if (!eraseln) promptlen = maxlen; | |
1497 | longjmp (restore, 1); | |
1498 | } | |
1499 | } | |
1500 | else if ((ch == otty.sg_kill) && !slash) { | |
1501 | if (hard) { | |
1502 | show (ch); | |
1503 | putchar ('\n'); | |
1504 | putchar (pchar); | |
1505 | } | |
1506 | else { | |
1507 | putchar ('\r'); | |
1508 | putchar (pchar); | |
1509 | if (eraseln) | |
1510 | erase (1); | |
1511 | promptlen = 1; | |
1512 | } | |
1513 | sptr = buf; | |
1514 | fflush (stdout); | |
1515 | continue; | |
1516 | } | |
1517 | if (slash && (ch == otty.sg_kill || ch == otty.sg_erase)) { | |
1518 | write (2, &BS, 1); | |
1519 | --sptr; | |
1520 | } | |
1521 | if (ch != '\\') | |
1522 | slash = 0; | |
1523 | *sptr++ = ch; | |
1524 | if ((ch < ' ' && ch != '\n' && ch != ESC) || ch == RUBOUT) { | |
1525 | ch += ch == RUBOUT ? -0100 : 0100; | |
1526 | write (2, &CARAT, 1); | |
1527 | promptlen++; | |
1528 | } | |
1529 | cbuf = ch; | |
1530 | if (ch != '\n' && ch != ESC) { | |
1531 | write (2, &cbuf, 1); | |
1532 | promptlen++; | |
1533 | } | |
1534 | else | |
1535 | break; | |
1536 | } | |
1537 | *--sptr = '\0'; | |
1538 | if (!eraseln) promptlen = maxlen; | |
1539 | if (sptr - buf >= nmax - 1) | |
1540 | error ("Line too long"); | |
1541 | } | |
1542 | ||
1543 | expand (outbuf, inbuf) | |
1544 | char *outbuf; | |
1545 | char *inbuf; | |
1546 | { | |
1547 | register char *instr; | |
1548 | register char *outstr; | |
1549 | register char ch; | |
1550 | char temp[200]; | |
1551 | int changed = 0; | |
1552 | ||
1553 | instr = inbuf; | |
1554 | outstr = temp; | |
1555 | while ((ch = *instr++) != '\0') | |
1556 | switch (ch) { | |
1557 | case '%': | |
1558 | if (!no_intty) { | |
1559 | strcpy (outstr, fnames[fnum]); | |
1560 | outstr += strlen (fnames[fnum]); | |
1561 | changed++; | |
1562 | } | |
1563 | else | |
1564 | *outstr++ = ch; | |
1565 | break; | |
1566 | case '!': | |
1567 | if (!shellp) | |
1568 | error ("No previous command to substitute for"); | |
1569 | strcpy (outstr, shell_line); | |
1570 | outstr += strlen (shell_line); | |
1571 | changed++; | |
1572 | break; | |
1573 | case '\\': | |
1574 | if (*instr == '%' || *instr == '!') { | |
1575 | *outstr++ = *instr++; | |
1576 | break; | |
1577 | } | |
1578 | default: | |
1579 | *outstr++ = ch; | |
1580 | } | |
1581 | *outstr++ = '\0'; | |
1582 | strcpy (outbuf, temp); | |
1583 | return (changed); | |
1584 | } | |
1585 | ||
1586 | show (ch) | |
1587 | register char ch; | |
1588 | { | |
1589 | char cbuf; | |
1590 | ||
1591 | if ((ch < ' ' && ch != '\n' && ch != ESC) || ch == RUBOUT) { | |
1592 | ch += ch == RUBOUT ? -0100 : 0100; | |
1593 | write (2, &CARAT, 1); | |
1594 | promptlen++; | |
1595 | } | |
1596 | cbuf = ch; | |
1597 | write (2, &cbuf, 1); | |
1598 | promptlen++; | |
1599 | } | |
1600 | ||
1601 | error (mess) | |
1602 | char *mess; | |
1603 | { | |
35bd36fc BJ |
1604 | if (clreol) |
1605 | cleareol (); | |
1606 | else | |
1607 | kill_line (); | |
ffa58356 ES |
1608 | promptlen += strlen (mess); |
1609 | if (Senter && Sexit) { | |
1610 | tputs (Senter, 1, putch); | |
1611 | pr(mess); | |
1612 | tputs (Sexit, 1, putch); | |
1613 | } | |
1614 | else | |
1615 | pr (mess); | |
1616 | fflush(stdout); | |
1617 | errors++; | |
1618 | longjmp (restore, 1); | |
1619 | } | |
1620 | ||
1621 | ||
1622 | set_tty () | |
1623 | { | |
1624 | otty.sg_flags |= MBIT; | |
1625 | otty.sg_flags &= ~ECHO; | |
d730d1dc | 1626 | stty(fileno(stderr), &otty); |
ffa58356 ES |
1627 | } |
1628 | ||
1629 | reset_tty () | |
1630 | { | |
2c880657 JK |
1631 | if (pstate) { |
1632 | tputs(ULexit, 1, putch); | |
1633 | fflush(stdout); | |
1634 | pstate = 0; | |
1635 | } | |
ffa58356 ES |
1636 | otty.sg_flags |= ECHO; |
1637 | otty.sg_flags &= ~MBIT; | |
d730d1dc | 1638 | stty(fileno(stderr), &savetty); |
ffa58356 ES |
1639 | } |
1640 | ||
1641 | rdline (f) | |
1642 | register FILE *f; | |
1643 | { | |
1644 | register char c; | |
1645 | register char *p; | |
1646 | ||
1647 | p = Line; | |
1648 | while ((c = Getc (f)) != '\n' && c != EOF && p - Line < LINSIZ - 1) | |
1649 | *p++ = c; | |
1650 | if (c == '\n') | |
1651 | Currline++; | |
1652 | *p = '\0'; | |
1653 | } | |
1654 | ||
1655 | /* Come here when we get a suspend signal from the terminal */ | |
1656 | ||
ffa58356 ES |
1657 | onsusp () |
1658 | { | |
910bcc08 MK |
1659 | /* ignore SIGTTOU so we don't get stopped if csh grabs the tty */ |
1660 | signal(SIGTTOU, SIG_IGN); | |
ffa58356 ES |
1661 | reset_tty (); |
1662 | fflush (stdout); | |
910bcc08 | 1663 | signal(SIGTTOU, SIG_DFL); |
ffa58356 | 1664 | /* Send the TSTP signal to suspend our process group */ |
2d4fa3b8 SL |
1665 | signal(SIGTSTP, SIG_DFL); |
1666 | sigsetmask(0); | |
ffa58356 ES |
1667 | kill (0, SIGTSTP); |
1668 | /* Pause for station break */ | |
1669 | ||
1670 | /* We're back */ | |
1671 | signal (SIGTSTP, onsusp); | |
1672 | set_tty (); | |
1673 | if (inwait) | |
1674 | longjmp (restore); | |
1675 | } |