Commit | Line | Data |
---|---|---|
a97c843b | 1 | static char *sccsid = "@(#)more.c 4.10 (Berkeley) 83/02/17"; |
35bd36fc | 2 | |
ffa58356 ES |
3 | /* |
4 | ** more.c - General purpose tty output filter and file perusal program | |
5 | ** | |
6 | ** by Eric Shienbrood, UC Berkeley | |
35bd36fc BJ |
7 | ** |
8 | ** modified by Geoff Peck, UCB to add underlining, single spacing | |
9 | ** modified by John Foderaro, UCB to add -c and MORE environment variable | |
ffa58356 ES |
10 | */ |
11 | ||
ffa58356 ES |
12 | #include <stdio.h> |
13 | #include <ctype.h> | |
14 | #include <signal.h> | |
15 | #include <errno.h> | |
16 | #include <sgtty.h> | |
17 | #include <setjmp.h> | |
18 | #include <sys/types.h> | |
ffa58356 ES |
19 | #include <sys/stat.h> |
20 | #include <local/uparm.h> | |
21 | ||
22 | /* Help file will eventually go in libpath(more.help) on all systems */ | |
23 | ||
ffa58356 | 24 | #define HELPFILE libpath(more.help) |
ffa58356 | 25 | #define VI binpath(vi) |
ffa58356 ES |
26 | |
27 | #define Fopen(s,m) (Currline = 0,file_pos=0,fopen(s,m)) | |
28 | #define Ftell(f) file_pos | |
29 | #define Fseek(f,off) (file_pos=off,fseek(f,off,0)) | |
30 | #define Getc(f) (++file_pos, getc(f)) | |
31 | #define Ungetc(c,f) (--file_pos, ungetc(c,f)) | |
32 | ||
ffa58356 ES |
33 | #define MBIT CBREAK |
34 | #define stty(fd,argp) ioctl(fd,TIOCSETN,argp) | |
ffa58356 ES |
35 | |
36 | #define TBUFSIZ 1024 | |
37 | #define LINSIZ 256 | |
38 | #define ctrl(letter) ('letter' & 077) | |
39 | #define RUBOUT '\177' | |
40 | #define ESC '\033' | |
41 | #define QUIT '\034' | |
42 | ||
43 | struct sgttyb otty; | |
44 | long file_pos, file_size; | |
45 | int fnum, no_intty, no_tty, slow_tty; | |
46 | int dum_opt, dlines, onquit(), end_it(); | |
ffa58356 | 47 | int onsusp(); |
ffa58356 ES |
48 | int nscroll = 11; /* Number of lines scrolled by 'd' */ |
49 | int fold_opt = 1; /* Fold long lines */ | |
50 | int stop_opt = 1; /* Stop after form feeds */ | |
35bd36fc BJ |
51 | int ssp_opt = 0; /* Suppress white space */ |
52 | int ul_opt = 1; /* Underline as best we can */ | |
ffa58356 ES |
53 | int promptlen; |
54 | int Currline; /* Line we are currently at */ | |
55 | int startup = 1; | |
56 | int firstf = 1; | |
57 | int notell = 1; | |
58 | int bad_so; /* True if overwriting does not turn off standout */ | |
59 | int inwait, Pause, errors; | |
60 | int within; /* true if we are within a file, | |
61 | false if we are between files */ | |
35bd36fc | 62 | int hard, dumb, noscroll, hardtabs, clreol; |
ffa58356 ES |
63 | int catch_susp; /* We should catch the SIGTSTP signal */ |
64 | char **fnames; /* The list of file names */ | |
65 | int nfiles; /* Number of files left to process */ | |
66 | char *shell; /* The name of the shell to use */ | |
67 | int shellp; /* A previous shell command exists */ | |
68 | char ch; | |
69 | jmp_buf restore; | |
70 | char obuf[BUFSIZ]; /* stdout buffer */ | |
71 | char Line[LINSIZ]; /* Line buffer */ | |
72 | int Lpp = 24; /* lines per page */ | |
73 | char *Clear; /* clear screen */ | |
74 | char *eraseln; /* erase line */ | |
75 | char *Senter, *Sexit;/* enter and exit standout mode */ | |
35bd36fc BJ |
76 | char *ULenter, *ULexit; /* enter and exit underline mode */ |
77 | char *chUL; /* underline character */ | |
78 | char *chBS; /* backspace character */ | |
38ccf597 BJ |
79 | char *Home; /* go to home */ |
80 | char *cursorm; /* cursor movement */ | |
81 | char cursorhome[40]; /* contains cursor movement to home */ | |
35bd36fc | 82 | char *EodClr; /* clear rest of screen */ |
ffa58356 ES |
83 | char *tgetstr(); |
84 | int Mcol = 80; /* number of columns */ | |
85 | int Wrap = 1; /* set if automargins */ | |
86 | long fseek(); | |
38ccf597 | 87 | char *getenv(); |
ffa58356 ES |
88 | struct { |
89 | long chrctr, line; | |
90 | } context, screen_start; | |
91 | extern char PC; /* pad character */ | |
92 | extern short ospeed; | |
93 | ||
94 | ||
95 | main(argc, argv) | |
96 | int argc; | |
97 | char *argv[]; | |
98 | { | |
99 | register FILE *f; | |
100 | register char *s; | |
101 | register char *p; | |
102 | register char ch; | |
103 | register int left; | |
104 | int prnames = 0; | |
105 | int initopt = 0; | |
106 | int srchopt = 0; | |
107 | int clearit = 0; | |
108 | int initline; | |
109 | char initbuf[80]; | |
110 | FILE *checkf(); | |
111 | ||
112 | nfiles = argc; | |
113 | fnames = argv; | |
114 | initterm (); | |
38ccf597 | 115 | if(s = getenv("MORE")) argscan(s); |
ffa58356 ES |
116 | while (--nfiles > 0) { |
117 | if ((ch = (*++fnames)[0]) == '-') { | |
38ccf597 | 118 | argscan(*fnames+1); |
ffa58356 ES |
119 | } |
120 | else if (ch == '+') { | |
121 | s = *fnames; | |
122 | if (*++s == '/') { | |
123 | srchopt++; | |
124 | for (++s, p = initbuf; p < initbuf + 79 && *s != '\0';) | |
125 | *p++ = *s++; | |
126 | *p = '\0'; | |
127 | } | |
128 | else { | |
129 | initopt++; | |
130 | for (initline = 0; *s != '\0'; s++) | |
131 | if (isdigit (*s)) | |
132 | initline = initline*10 + *s -'0'; | |
133 | --initline; | |
134 | } | |
135 | } | |
136 | else break; | |
137 | } | |
35bd36fc | 138 | /* allow clreol only if Home and eraseln and EodClr strings are |
38ccf597 BJ |
139 | * defined, and in that case, make sure we are in noscroll mode |
140 | */ | |
141 | if(clreol) | |
142 | { | |
35bd36fc BJ |
143 | if ((*Home == '\0') || (*eraseln == '\0') || (*EodClr == '\0')) |
144 | clreol = 0; | |
38ccf597 BJ |
145 | else noscroll = 1; |
146 | } | |
147 | ||
ffa58356 ES |
148 | if (dlines == 0) |
149 | dlines = Lpp - (noscroll ? 1 : 2); | |
150 | left = dlines; | |
151 | if (nfiles > 1) | |
152 | prnames++; | |
153 | if (!no_intty && nfiles == 0) { | |
154 | fputs("Usage: ",stderr); | |
155 | fputs(argv[0],stderr); | |
156 | fputs(" [-dfln] [+linenum | +/pattern] name1 name2 ...\n",stderr); | |
157 | exit(1); | |
158 | } | |
159 | else | |
160 | f = stdin; | |
161 | if (!no_tty) { | |
162 | signal(SIGQUIT, onquit); | |
163 | signal(SIGINT, end_it); | |
ffa58356 ES |
164 | if (signal (SIGTSTP, SIG_IGN) == SIG_DFL) { |
165 | signal(SIGTSTP, onsusp); | |
166 | catch_susp++; | |
167 | } | |
ffa58356 ES |
168 | stty (2, &otty); |
169 | } | |
170 | if (no_intty) { | |
171 | if (no_tty) | |
172 | copy_file (stdin); | |
173 | else { | |
174 | if ((ch = Getc (f)) == '\f') | |
35bd36fc | 175 | doclear(); |
ffa58356 ES |
176 | else { |
177 | Ungetc (ch, f); | |
35bd36fc BJ |
178 | if (noscroll && (ch != EOF)) { |
179 | if (clreol) | |
180 | home (); | |
181 | else | |
182 | doclear (); | |
38ccf597 | 183 | } |
ffa58356 ES |
184 | } |
185 | if (srchopt) | |
38ccf597 | 186 | { |
ffa58356 | 187 | search (initbuf, stdin, 1); |
35bd36fc BJ |
188 | if (noscroll) |
189 | left--; | |
38ccf597 | 190 | } |
ffa58356 ES |
191 | else if (initopt) |
192 | skiplns (initline, stdin); | |
193 | screen (stdin, left); | |
194 | } | |
195 | no_intty = 0; | |
196 | prnames++; | |
197 | firstf = 0; | |
198 | } | |
199 | ||
200 | while (fnum < nfiles) { | |
201 | if ((f = checkf (fnames[fnum], &clearit)) != NULL) { | |
202 | context.line = context.chrctr = 0; | |
203 | Currline = 0; | |
204 | if (firstf) setjmp (restore); | |
205 | if (firstf) { | |
206 | firstf = 0; | |
207 | if (srchopt) | |
38ccf597 | 208 | { |
ffa58356 | 209 | search (initbuf, f, 1); |
35bd36fc BJ |
210 | if (noscroll) |
211 | left--; | |
38ccf597 | 212 | } |
ffa58356 ES |
213 | else if (initopt) |
214 | skiplns (initline, f); | |
215 | } | |
216 | else if (fnum < nfiles && !no_tty) { | |
217 | setjmp (restore); | |
218 | left = command (fnames[fnum], f); | |
219 | } | |
220 | if (left != 0) { | |
35bd36fc BJ |
221 | if ((noscroll || clearit) && (file_size != 0x7fffffffffffffffL)) |
222 | if (clreol) | |
223 | home (); | |
224 | else | |
225 | doclear (); | |
ffa58356 ES |
226 | if (prnames) { |
227 | if (bad_so) | |
228 | erase (0); | |
35bd36fc BJ |
229 | if (clreol) |
230 | cleareol (); | |
ffa58356 ES |
231 | pr("::::::::::::::"); |
232 | if (promptlen > 14) | |
233 | erase (14); | |
38ccf597 BJ |
234 | printf ("\n"); |
235 | if(clreol) cleareol(); | |
236 | printf("%s\n", fnames[fnum]); | |
237 | if(clreol) cleareol(); | |
238 | printf("::::::::::::::\n", fnames[fnum]); | |
ffa58356 ES |
239 | if (left > Lpp - 4) |
240 | left = Lpp - 4; | |
241 | } | |
242 | if (no_tty) | |
243 | copy_file (f); | |
244 | else { | |
245 | within++; | |
246 | screen(f, left); | |
247 | within = 0; | |
248 | } | |
249 | } | |
250 | setjmp (restore); | |
251 | fflush(stdout); | |
252 | fclose(f); | |
253 | screen_start.line = screen_start.chrctr = 0L; | |
254 | context.line = context.chrctr = 0L; | |
255 | } | |
256 | fnum++; | |
257 | firstf = 0; | |
258 | } | |
259 | reset_tty (); | |
260 | exit(0); | |
261 | } | |
262 | ||
38ccf597 BJ |
263 | argscan(s) |
264 | char *s; | |
265 | { | |
266 | for (dlines = 0; *s != '\0'; s++) | |
267 | if (isdigit(*s)) | |
268 | dlines = dlines*10 + *s - '0'; | |
269 | else if (*s == 'd') | |
270 | dum_opt = 1; | |
271 | else if (*s == 'l') | |
272 | stop_opt = 0; | |
273 | else if (*s == 'f') | |
274 | fold_opt = 0; | |
275 | else if (*s == 'p') | |
276 | noscroll++; | |
277 | else if (*s == 'c') | |
278 | clreol++; | |
35bd36fc BJ |
279 | else if (*s == 's') |
280 | ssp_opt = 1; | |
281 | else if (*s == 'u') | |
282 | ul_opt = 0; | |
38ccf597 BJ |
283 | } |
284 | ||
285 | ||
ffa58356 ES |
286 | /* |
287 | ** Check whether the file named by fs is an ASCII file which the user may | |
288 | ** access. If it is, return the opened file. Otherwise return NULL. | |
289 | */ | |
290 | ||
291 | FILE * | |
292 | checkf (fs, clearfirst) | |
293 | register char *fs; | |
294 | int *clearfirst; | |
295 | { | |
296 | struct stat stbuf; | |
297 | register FILE *f; | |
298 | char c; | |
299 | ||
300 | if (stat (fs, &stbuf) == -1) { | |
301 | fflush(stdout); | |
35bd36fc BJ |
302 | if (clreol) |
303 | cleareol (); | |
ffa58356 ES |
304 | perror(fs); |
305 | return (NULL); | |
306 | } | |
307 | if ((stbuf.st_mode & S_IFMT) == S_IFDIR) { | |
308 | printf("\n*** %s: directory ***\n\n", fs); | |
309 | return (NULL); | |
310 | } | |
311 | if ((f=Fopen(fs, "r")) == NULL) { | |
312 | fflush(stdout); | |
313 | perror(fs); | |
314 | return (NULL); | |
315 | } | |
316 | c = Getc(f); | |
317 | ||
318 | /* Try to see whether it is an ASCII file */ | |
319 | ||
320 | switch ((c | *f->_ptr << 8) & 0177777) { | |
321 | case 0405: | |
322 | case 0407: | |
323 | case 0410: | |
324 | case 0411: | |
325 | case 0413: | |
326 | case 0177545: | |
327 | printf("\n******** %s: Not a text file ********\n\n", fs); | |
328 | fclose (f); | |
329 | return (NULL); | |
330 | default: | |
331 | break; | |
332 | } | |
333 | if (c == '\f') | |
334 | *clearfirst = 1; | |
335 | else { | |
336 | *clearfirst = 0; | |
337 | Ungetc (c, f); | |
338 | } | |
339 | if ((file_size = stbuf.st_size) == 0) | |
340 | file_size = 0x7fffffffffffffffL; | |
341 | return (f); | |
342 | } | |
343 | ||
344 | /* | |
345 | ** A real function, for the tputs routine in termlib | |
346 | */ | |
347 | ||
348 | putch (ch) | |
349 | char ch; | |
350 | { | |
351 | putchar (ch); | |
352 | } | |
353 | ||
354 | /* | |
355 | ** Print out the contents of the file f, one screenful at a time. | |
356 | */ | |
357 | ||
358 | #define STOP -10 | |
359 | ||
360 | screen (f, num_lines) | |
361 | register FILE *f; | |
362 | register int num_lines; | |
363 | { | |
364 | register int c; | |
365 | register int nchars; | |
35bd36fc BJ |
366 | int length; /* length of current line */ |
367 | static int prev_len = 1; /* length of previous line */ | |
ffa58356 ES |
368 | |
369 | for (;;) { | |
370 | while (num_lines > 0 && !Pause) { | |
371 | if ((nchars = getline (f, &length)) == EOF) | |
38ccf597 | 372 | { |
35bd36fc BJ |
373 | if (clreol) |
374 | clreos(); | |
ffa58356 | 375 | return; |
38ccf597 | 376 | } |
35bd36fc BJ |
377 | if (ssp_opt && length == 0 && prev_len == 0) |
378 | continue; | |
379 | prev_len = length; | |
ffa58356 ES |
380 | if (bad_so || (Senter && *Senter == ' ') && promptlen > 0) |
381 | erase (0); | |
35bd36fc BJ |
382 | /* must clear before drawing line since tabs on some terminals |
383 | * do not erase what they tab over. | |
384 | */ | |
385 | if (clreol) | |
386 | cleareol (); | |
ffa58356 ES |
387 | prbuf (Line, length); |
388 | if (nchars < promptlen) | |
389 | erase (nchars); /* erase () sets promptlen to 0 */ | |
390 | else promptlen = 0; | |
35bd36fc BJ |
391 | /* is this needed? |
392 | * if (clreol) | |
393 | * cleareol(); /* must clear again in case we wrapped * | |
394 | */ | |
ffa58356 ES |
395 | if (nchars < Mcol || !fold_opt) |
396 | putchar('\n'); | |
397 | if (nchars == STOP) | |
398 | break; | |
399 | num_lines--; | |
400 | } | |
401 | fflush(stdout); | |
402 | if ((c = Getc(f)) == EOF) | |
38ccf597 | 403 | { |
35bd36fc BJ |
404 | if (clreol) |
405 | clreos (); | |
ffa58356 | 406 | return; |
38ccf597 BJ |
407 | } |
408 | ||
35bd36fc BJ |
409 | if (Pause && clreol) |
410 | clreos (); | |
ffa58356 ES |
411 | Ungetc (c, f); |
412 | setjmp (restore); | |
413 | Pause = 0; startup = 0; | |
414 | if ((num_lines = command (NULL, f)) == 0) | |
415 | return; | |
416 | if (hard && promptlen > 0) | |
417 | erase (0); | |
a97c843b | 418 | if (noscroll && num_lines >= dlines) |
38ccf597 | 419 | { |
35bd36fc BJ |
420 | if (clreol) |
421 | home(); | |
422 | else | |
423 | doclear (); | |
38ccf597 | 424 | } |
ffa58356 ES |
425 | screen_start.line = Currline; |
426 | screen_start.chrctr = Ftell (f); | |
427 | } | |
428 | } | |
429 | ||
430 | /* | |
431 | ** Come here if a quit signal is received | |
432 | */ | |
433 | ||
434 | onquit() | |
435 | { | |
436 | signal(SIGQUIT, SIG_IGN); | |
437 | if (!inwait) { | |
438 | putchar ('\n'); | |
439 | if (!startup) { | |
440 | signal(SIGQUIT, onquit); | |
441 | longjmp (restore, 1); | |
442 | } | |
443 | else | |
444 | Pause++; | |
445 | } | |
446 | else if (!dum_opt && notell) { | |
447 | write (2, "[Use q or Q to quit]", 20); | |
448 | promptlen += 20; | |
449 | notell = 0; | |
450 | } | |
451 | signal(SIGQUIT, onquit); | |
452 | } | |
453 | ||
454 | /* | |
455 | ** Clean up terminal state and exit. Also come here if interrupt signal received | |
456 | */ | |
457 | ||
458 | end_it () | |
459 | { | |
460 | ||
461 | reset_tty (); | |
35bd36fc BJ |
462 | if (clreol) { |
463 | putchar ('\r'); | |
464 | clreos (); | |
465 | fflush (stdout); | |
466 | } | |
38ccf597 | 467 | else if (!clreol && (promptlen > 0)) { |
ffa58356 ES |
468 | kill_line (); |
469 | fflush (stdout); | |
470 | } | |
471 | else | |
472 | write (2, "\n", 1); | |
473 | _exit(0); | |
474 | } | |
475 | ||
476 | copy_file(f) | |
477 | register FILE *f; | |
478 | { | |
479 | register int c; | |
480 | ||
481 | while ((c = getc(f)) != EOF) | |
482 | putchar(c); | |
483 | } | |
484 | ||
485 | /* Simplified printf function */ | |
486 | ||
487 | printf (fmt, args) | |
488 | register char *fmt; | |
489 | int args; | |
490 | { | |
491 | register int *argp; | |
492 | register char ch; | |
493 | register int ccount; | |
494 | ||
495 | ccount = 0; | |
496 | argp = &args; | |
497 | while (*fmt) { | |
498 | while ((ch = *fmt++) != '%') { | |
499 | if (ch == '\0') | |
500 | return (ccount); | |
501 | ccount++; | |
502 | putchar (ch); | |
503 | } | |
504 | switch (*fmt++) { | |
505 | case 'd': | |
506 | ccount += printd (*argp); | |
507 | break; | |
508 | case 's': | |
509 | ccount += pr ((char *)*argp); | |
510 | break; | |
511 | case '%': | |
512 | ccount++; | |
513 | argp--; | |
514 | putchar ('%'); | |
515 | break; | |
516 | case '0': | |
517 | return (ccount); | |
518 | default: | |
519 | break; | |
520 | } | |
521 | ++argp; | |
522 | } | |
523 | return (ccount); | |
524 | ||
525 | } | |
526 | ||
527 | /* | |
528 | ** Print an integer as a string of decimal digits, | |
529 | ** returning the length of the print representation. | |
530 | */ | |
531 | ||
532 | printd (n) | |
533 | int n; | |
534 | { | |
535 | int a, nchars; | |
536 | ||
537 | if (a = n/10) | |
538 | nchars = 1 + printd(a); | |
539 | else | |
540 | nchars = 1; | |
541 | putchar (n % 10 + '0'); | |
542 | return (nchars); | |
543 | } | |
544 | ||
545 | /* Put the print representation of an integer into a string */ | |
546 | static char *sptr; | |
547 | ||
548 | scanstr (n, str) | |
549 | int n; | |
550 | char *str; | |
551 | { | |
552 | sptr = str; | |
553 | sprintf (n); | |
554 | *sptr = '\0'; | |
555 | } | |
556 | ||
557 | sprintf (n) | |
558 | { | |
559 | int a; | |
560 | ||
561 | if (a = n/10) | |
562 | sprintf (a); | |
563 | *sptr++ = n % 10 + '0'; | |
564 | } | |
565 | ||
566 | static char bell = ctrl(G); | |
567 | ||
568 | strlen (s) | |
569 | char *s; | |
570 | { | |
571 | register char *p; | |
572 | ||
573 | p = s; | |
574 | while (*p++) | |
575 | ; | |
576 | return (p - s - 1); | |
577 | } | |
578 | ||
579 | /* See whether the last component of the path name "path" is equal to the | |
580 | ** string "string" | |
581 | */ | |
582 | ||
583 | tailequ (path, string) | |
584 | char *path; | |
585 | register char *string; | |
586 | { | |
587 | register char *tail; | |
588 | ||
589 | tail = path + strlen(path); | |
590 | while (tail >= path) | |
591 | if (*(--tail) == '/') | |
592 | break; | |
593 | ++tail; | |
594 | while (*tail++ == *string++) | |
595 | if (*tail == '\0') | |
596 | return(1); | |
597 | return(0); | |
598 | } | |
599 | ||
600 | prompt (filename) | |
601 | char *filename; | |
602 | { | |
35bd36fc BJ |
603 | if (clreol) |
604 | cleareol (); | |
38ccf597 | 605 | else if (promptlen > 0) |
ffa58356 ES |
606 | kill_line (); |
607 | if (!hard) { | |
608 | promptlen = 8; | |
609 | if (Senter && Sexit) | |
610 | tputs (Senter, 1, putch); | |
35bd36fc BJ |
611 | if (clreol) |
612 | cleareol (); | |
ffa58356 ES |
613 | pr("--More--"); |
614 | if (filename != NULL) { | |
615 | promptlen += printf ("(Next file: %s)", filename); | |
616 | } | |
617 | else if (!no_intty) { | |
618 | promptlen += printf ("(%d%%)", (int)((file_pos * 100) / file_size)); | |
619 | } | |
620 | if (dum_opt) { | |
621 | promptlen += pr("[Hit space to continue, Rubout to abort]"); | |
622 | } | |
623 | if (Senter && Sexit) | |
624 | tputs (Sexit, 1, putch); | |
35bd36fc BJ |
625 | if (clreol) |
626 | clreos (); | |
ffa58356 ES |
627 | fflush(stdout); |
628 | } | |
629 | else | |
630 | write (2, &bell, 1); | |
631 | inwait++; | |
632 | } | |
633 | ||
634 | /* | |
635 | ** Get a logical line | |
636 | */ | |
637 | ||
638 | getline(f, length) | |
639 | register FILE *f; | |
640 | int *length; | |
641 | { | |
642 | register int c; | |
643 | register char *p; | |
644 | register int column; | |
645 | static int colflg; | |
646 | ||
647 | p = Line; | |
648 | column = 0; | |
649 | c = Getc (f); | |
650 | if (colflg && c == '\n') { | |
651 | Currline++; | |
652 | c = Getc (f); | |
653 | } | |
654 | while (p < &Line[LINSIZ - 1]) { | |
655 | if (c == EOF) { | |
656 | if (p > Line) { | |
657 | *p = '\0'; | |
658 | *length = p - Line; | |
659 | return (column); | |
660 | } | |
661 | *length = p - Line; | |
662 | return (EOF); | |
663 | } | |
664 | if (c == '\n') { | |
665 | Currline++; | |
666 | break; | |
667 | } | |
668 | *p++ = c; | |
669 | if (c == '\t') | |
670 | if (hardtabs && column < promptlen && !hard) { | |
671 | if (eraseln && !dumb) { | |
672 | column = 1 + (column | 7); | |
673 | tputs (eraseln, 1, putch); | |
674 | promptlen = 0; | |
675 | } | |
676 | else { | |
677 | for (--p; column & 7 && p < &Line[LINSIZ - 1]; column++) { | |
678 | *p++ = ' '; | |
679 | } | |
680 | if (column >= promptlen) promptlen = 0; | |
681 | } | |
682 | } | |
683 | else | |
684 | column = 1 + (column | 7); | |
d1b174c2 | 685 | else if (c == '\b' && column > 0) |
ffa58356 ES |
686 | column--; |
687 | else if (c == '\r') | |
688 | column = 0; | |
689 | else if (c == '\f' && stop_opt) { | |
690 | p[-1] = '^'; | |
691 | *p++ = 'L'; | |
692 | column += 2; | |
693 | Pause++; | |
694 | } | |
695 | else if (c == EOF) { | |
696 | *length = p - Line; | |
697 | return (column); | |
698 | } | |
699 | else if (c >= ' ' && c != RUBOUT) | |
700 | column++; | |
701 | if (column >= Mcol && fold_opt) break; | |
702 | c = Getc (f); | |
703 | } | |
704 | if (column >= Mcol && Mcol > 0) { | |
705 | if (!Wrap) { | |
706 | *p++ = '\n'; | |
707 | } | |
708 | } | |
709 | colflg = column == Mcol && fold_opt; | |
710 | *length = p - Line; | |
711 | *p = 0; | |
712 | return (column); | |
713 | } | |
714 | ||
715 | /* | |
716 | ** Erase the rest of the prompt, assuming we are starting at column col. | |
717 | */ | |
718 | ||
719 | erase (col) | |
720 | register int col; | |
721 | { | |
722 | ||
723 | if (promptlen == 0) | |
724 | return; | |
725 | if (hard) { | |
726 | putchar ('\n'); | |
727 | } | |
728 | else { | |
729 | if (col == 0) | |
730 | putchar ('\r'); | |
731 | if (!dumb && eraseln) | |
732 | tputs (eraseln, 1, putch); | |
733 | else | |
734 | for (col = promptlen - col; col > 0; col--) | |
735 | putchar (' '); | |
736 | } | |
737 | promptlen = 0; | |
738 | } | |
739 | ||
740 | /* | |
741 | ** Erase the current line entirely | |
742 | */ | |
743 | ||
744 | kill_line () | |
745 | { | |
746 | erase (0); | |
747 | if (!eraseln || dumb) putchar ('\r'); | |
748 | } | |
749 | ||
38ccf597 BJ |
750 | /* |
751 | * force clear to end of line | |
752 | */ | |
753 | cleareol() | |
754 | { | |
35bd36fc | 755 | tputs(eraseln, 1, putch); |
38ccf597 BJ |
756 | } |
757 | ||
35bd36fc | 758 | clreos() |
38ccf597 | 759 | { |
35bd36fc | 760 | tputs(EodClr, 1, putch); |
38ccf597 BJ |
761 | } |
762 | ||
ffa58356 ES |
763 | /* |
764 | ** Print string and return number of characters | |
765 | */ | |
766 | ||
767 | pr(s1) | |
768 | char *s1; | |
769 | { | |
770 | register char *s; | |
771 | register char c; | |
772 | ||
773 | for (s = s1; c = *s++; ) | |
774 | putchar(c); | |
775 | return (s - s1 - 1); | |
776 | } | |
777 | ||
778 | ||
779 | /* Print a buffer of n characters */ | |
780 | ||
781 | prbuf (s, n) | |
782 | register char *s; | |
783 | register int n; | |
784 | { | |
35bd36fc BJ |
785 | char c; /* next ouput character */ |
786 | register int state; /* next output char's UL state */ | |
787 | static int pstate = 0; /* current terminal UL state (off) */ | |
788 | ||
789 | while (--n >= 0) | |
790 | if (!ul_opt) | |
791 | putchar (*s++); | |
792 | else { | |
793 | if (n >= 2 && s[0] == '_' && s[1] == '\b') { | |
794 | n -= 2; | |
795 | s += 2; | |
796 | c = *s++; | |
797 | state = 1; | |
798 | } else if (n >= 2 && s[1] == '\b' && s[2] == '_') { | |
799 | n -= 2; | |
800 | c = *s++; | |
801 | s += 2; | |
802 | state = 1; | |
803 | } else { | |
804 | c = *s++; | |
805 | state = 0; | |
806 | } | |
807 | if (state != pstate) | |
808 | tputs(state ? ULenter : ULexit, 1, putch); | |
809 | pstate = state; | |
810 | putchar(c); | |
811 | if (state && *chUL) { | |
812 | pr(chBS); | |
813 | tputs(chUL, 1, putch); | |
814 | } | |
815 | } | |
ffa58356 ES |
816 | } |
817 | ||
818 | /* | |
819 | ** Clear the screen | |
820 | */ | |
821 | ||
822 | doclear() | |
823 | { | |
824 | if (Clear && !hard) { | |
825 | tputs(Clear, 1, putch); | |
826 | ||
827 | /* Put out carriage return so that system doesn't | |
828 | ** get confused by escape sequences when expanding tabs | |
829 | */ | |
830 | putchar ('\r'); | |
831 | promptlen = 0; | |
832 | } | |
833 | } | |
834 | ||
38ccf597 BJ |
835 | /* |
836 | * Go to home position | |
837 | */ | |
838 | home() | |
839 | { | |
840 | tputs(Home,1,putch); | |
841 | } | |
842 | ||
ffa58356 ES |
843 | static int lastcmd, lastarg, lastp; |
844 | static int lastcolon; | |
845 | char shell_line[132]; | |
846 | ||
847 | /* | |
848 | ** Read a command and do it. A command consists of an optional integer | |
849 | ** argument followed by the command character. Return the number of lines | |
850 | ** to display in the next screenful. If there is nothing more to display | |
851 | ** in the current file, zero is returned. | |
852 | */ | |
853 | ||
854 | command (filename, f) | |
855 | char *filename; | |
856 | register FILE *f; | |
857 | { | |
858 | register int nlines; | |
859 | register int retval; | |
860 | register char c; | |
861 | char colonch; | |
862 | FILE *helpf; | |
863 | int done; | |
864 | char comchar, cmdbuf[80], *p; | |
865 | ||
866 | #define ret(val) retval=val;done++;break | |
867 | ||
868 | done = 0; | |
869 | if (!errors) | |
870 | prompt (filename); | |
871 | else | |
872 | errors = 0; | |
873 | if (MBIT == RAW && slow_tty) { | |
874 | otty.sg_flags |= MBIT; | |
875 | stty(2, &otty); | |
876 | } | |
877 | for (;;) { | |
878 | nlines = number (&comchar); | |
879 | lastp = colonch = 0; | |
880 | if (comchar == '.') { /* Repeat last command */ | |
881 | lastp++; | |
882 | comchar = lastcmd; | |
883 | nlines = lastarg; | |
884 | if (lastcmd == ':') | |
885 | colonch = lastcolon; | |
886 | } | |
887 | lastcmd = comchar; | |
888 | lastarg = nlines; | |
889 | if (comchar == otty.sg_erase) { | |
890 | kill_line (); | |
891 | prompt (filename); | |
892 | continue; | |
893 | } | |
894 | switch (comchar) { | |
895 | case ':': | |
896 | retval = colon (filename, colonch, nlines); | |
897 | if (retval >= 0) | |
898 | done++; | |
899 | break; | |
900 | case ' ': | |
901 | case 'z': | |
902 | if (nlines == 0) nlines = dlines; | |
903 | else if (comchar == 'z') dlines = nlines; | |
904 | ret (nlines); | |
905 | case 'd': | |
906 | case ctrl(D): | |
907 | if (nlines != 0) nscroll = nlines; | |
908 | ret (nscroll); | |
909 | case RUBOUT: | |
910 | case 'q': | |
911 | case 'Q': | |
912 | end_it (); | |
913 | case 's': | |
914 | case 'f': | |
915 | if (nlines == 0) nlines++; | |
916 | if (comchar == 'f') | |
917 | nlines *= dlines; | |
918 | putchar ('\r'); | |
919 | erase (0); | |
35bd36fc BJ |
920 | printf ("\n"); |
921 | if (clreol) | |
922 | cleareol (); | |
923 | printf ("...skipping %d line", nlines); | |
ffa58356 | 924 | if (nlines > 1) |
35bd36fc | 925 | pr ("s\n"); |
ffa58356 | 926 | else |
35bd36fc BJ |
927 | pr ("\n"); |
928 | ||
929 | if (clreol) | |
930 | cleareol (); | |
931 | pr ("\n"); | |
932 | ||
ffa58356 ES |
933 | while (nlines > 0) { |
934 | while ((c = Getc (f)) != '\n') | |
935 | if (c == EOF) { | |
936 | retval = 0; | |
937 | done++; | |
938 | goto endsw; | |
939 | } | |
940 | Currline++; | |
941 | nlines--; | |
942 | } | |
943 | ret (dlines); | |
944 | case '\n': | |
945 | if (nlines != 0) | |
946 | dlines = nlines; | |
947 | else | |
948 | nlines = 1; | |
949 | ret (nlines); | |
950 | case '\f': | |
951 | if (!no_intty) { | |
952 | doclear (); | |
953 | Fseek (f, screen_start.chrctr); | |
954 | Currline = screen_start.line; | |
955 | ret (dlines); | |
956 | } | |
957 | else { | |
958 | write (2, &bell, 1); | |
959 | break; | |
960 | } | |
961 | case '\'': | |
962 | if (!no_intty) { | |
963 | kill_line (); | |
964 | pr ("\n***Back***\n\n"); | |
965 | Fseek (f, context.chrctr); | |
966 | Currline = context.line; | |
967 | ret (dlines); | |
968 | } | |
969 | else { | |
970 | write (2, &bell, 1); | |
971 | break; | |
972 | } | |
973 | case '=': | |
974 | kill_line (); | |
975 | promptlen = printd (Currline); | |
976 | fflush (stdout); | |
977 | break; | |
978 | case 'n': | |
979 | lastp++; | |
980 | case '/': | |
981 | if (nlines == 0) nlines++; | |
982 | kill_line (); | |
983 | pr ("/"); | |
984 | promptlen = 1; | |
985 | fflush (stdout); | |
986 | if (lastp) { | |
987 | write (2,"\r", 1); | |
988 | search (NULL, f, nlines); /* Use previous r.e. */ | |
989 | } | |
990 | else { | |
991 | ttyin (cmdbuf, 78, '/'); | |
992 | write (2, "\r", 1); | |
993 | search (cmdbuf, f, nlines); | |
994 | } | |
38ccf597 | 995 | ret (dlines-1); |
ffa58356 ES |
996 | case '!': |
997 | do_shell (filename); | |
998 | break; | |
999 | case 'h': | |
1000 | if ((helpf = fopen (HELPFILE, "r")) == NULL) | |
1001 | error ("Can't open help file"); | |
1002 | if (noscroll) doclear (); | |
1003 | copy_file (helpf); | |
1004 | close (helpf); | |
1005 | prompt (filename); | |
1006 | break; | |
1007 | case 'v': /* This case should go right before default */ | |
1008 | if (!no_intty) { | |
1009 | kill_line (); | |
1010 | cmdbuf[0] = '+'; | |
1011 | scanstr (Currline, &cmdbuf[1]); | |
1012 | pr ("vi "); pr (cmdbuf); putchar (' '); pr (fnames[fnum]); | |
1013 | execute (filename, VI, "vi", cmdbuf, fnames[fnum], 0); | |
1014 | break; | |
1015 | } | |
1016 | default: | |
1017 | write (2, &bell, 1); | |
1018 | break; | |
1019 | } | |
1020 | if (done) break; | |
1021 | } | |
1022 | putchar ('\r'); | |
1023 | endsw: | |
1024 | inwait = 0; | |
1025 | notell++; | |
1026 | if (MBIT == RAW && slow_tty) { | |
1027 | otty.sg_flags &= ~MBIT; | |
1028 | stty(2, &otty); | |
1029 | } | |
1030 | return (retval); | |
1031 | } | |
1032 | ||
1033 | char ch; | |
1034 | ||
1035 | /* | |
1036 | * Execute a colon-prefixed command. | |
1037 | * Returns <0 if not a command that should cause | |
1038 | * more of the file to be printed. | |
1039 | */ | |
1040 | ||
1041 | colon (filename, cmd, nlines) | |
1042 | char *filename; | |
1043 | int cmd; | |
1044 | int nlines; | |
1045 | { | |
1046 | if (cmd == 0) | |
1047 | ch = readch (); | |
1048 | else | |
1049 | ch = cmd; | |
1050 | lastcolon = ch; | |
1051 | switch (ch) { | |
1052 | case 'f': | |
1053 | kill_line (); | |
1054 | if (!no_intty) | |
1055 | promptlen = printf ("\"%s\" line %d", fnames[fnum], Currline); | |
1056 | else | |
1057 | promptlen = printf ("[Not a file] line %d", Currline); | |
1058 | fflush (stdout); | |
1059 | return (-1); | |
1060 | case 'n': | |
1061 | if (nlines == 0) { | |
1062 | if (fnum >= nfiles - 1) | |
1063 | end_it (); | |
1064 | nlines++; | |
1065 | } | |
1066 | putchar ('\r'); | |
1067 | erase (0); | |
1068 | skipf (nlines); | |
1069 | return (0); | |
1070 | case 'p': | |
1071 | if (no_intty) { | |
1072 | write (2, &bell, 1); | |
1073 | return (-1); | |
1074 | } | |
1075 | putchar ('\r'); | |
1076 | erase (0); | |
1077 | if (nlines == 0) | |
1078 | nlines++; | |
1079 | skipf (-nlines); | |
1080 | return (0); | |
1081 | case '!': | |
1082 | do_shell (filename); | |
1083 | return (-1); | |
1084 | case 'q': | |
1085 | case 'Q': | |
1086 | end_it (); | |
1087 | default: | |
1088 | write (2, &bell, 1); | |
1089 | return (-1); | |
1090 | } | |
1091 | } | |
1092 | ||
1093 | /* | |
1094 | ** Read a decimal number from the terminal. Set cmd to the non-digit which | |
1095 | ** terminates the number. | |
1096 | */ | |
1097 | ||
1098 | number(cmd) | |
1099 | char *cmd; | |
1100 | { | |
1101 | register int i; | |
1102 | ||
1103 | i = 0; ch = otty.sg_kill; | |
1104 | for (;;) { | |
1105 | ch = readch (); | |
1106 | if (ch >= '0' && ch <= '9') | |
1107 | i = i*10 + ch - '0'; | |
1108 | else if (ch == otty.sg_kill) | |
1109 | i = 0; | |
1110 | else { | |
1111 | *cmd = ch; | |
1112 | break; | |
1113 | } | |
1114 | } | |
1115 | return (i); | |
1116 | } | |
1117 | ||
1118 | do_shell (filename) | |
1119 | char *filename; | |
1120 | { | |
1121 | char cmdbuf[80]; | |
1122 | ||
1123 | kill_line (); | |
1124 | pr ("!"); | |
1125 | fflush (stdout); | |
1126 | promptlen = 1; | |
1127 | if (lastp) | |
1128 | pr (shell_line); | |
1129 | else { | |
1130 | ttyin (cmdbuf, 78, '!'); | |
1131 | if (expand (shell_line, cmdbuf)) { | |
1132 | kill_line (); | |
1133 | promptlen = printf ("!%s", shell_line); | |
1134 | } | |
1135 | } | |
1136 | fflush (stdout); | |
1137 | write (2, "\n", 1); | |
1138 | promptlen = 0; | |
1139 | shellp = 1; | |
1140 | execute (filename, shell, shell, "-c", shell_line, 0); | |
1141 | } | |
1142 | ||
1143 | /* | |
1144 | ** Search for nth ocurrence of regular expression contained in buf in the file | |
1145 | */ | |
1146 | ||
1147 | search (buf, file, n) | |
1148 | char buf[]; | |
1149 | FILE *file; | |
1150 | register int n; | |
1151 | { | |
1152 | long startline = Ftell (file); | |
1153 | register long line1 = startline; | |
1154 | register long line2 = startline; | |
1155 | register long line3 = startline; | |
1156 | register int lncount; | |
1157 | int saveln, rv, re_exec(); | |
1158 | char *s, *re_comp(); | |
1159 | ||
1160 | context.line = saveln = Currline; | |
1161 | context.chrctr = startline; | |
1162 | lncount = 0; | |
1163 | if ((s = re_comp (buf)) != 0) | |
1164 | error (s); | |
1165 | while (!feof (file)) { | |
1166 | line3 = line2; | |
1167 | line2 = line1; | |
1168 | line1 = Ftell (file); | |
1169 | rdline (file); | |
1170 | lncount++; | |
1171 | if ((rv = re_exec (Line)) == 1) | |
1172 | if (--n == 0) { | |
1173 | if (lncount > 3 || (lncount > 1 && no_intty)) | |
38ccf597 BJ |
1174 | { |
1175 | pr ("\n"); | |
35bd36fc BJ |
1176 | if (clreol) |
1177 | cleareol (); | |
38ccf597 BJ |
1178 | pr("...skipping\n"); |
1179 | } | |
ffa58356 ES |
1180 | if (!no_intty) { |
1181 | Currline -= (lncount >= 3 ? 3 : lncount); | |
1182 | Fseek (file, line3); | |
35bd36fc BJ |
1183 | if (noscroll) |
1184 | if (clreol) { | |
1185 | home (); | |
1186 | cleareol (); | |
1187 | } | |
1188 | else | |
1189 | doclear (); | |
ffa58356 ES |
1190 | } |
1191 | else { | |
1192 | kill_line (); | |
35bd36fc BJ |
1193 | if (noscroll) |
1194 | if (clreol) { | |
1195 | home (); | |
1196 | cleareol (); | |
1197 | } | |
1198 | else | |
1199 | doclear (); | |
ffa58356 ES |
1200 | pr (Line); |
1201 | putchar ('\n'); | |
1202 | } | |
1203 | break; | |
1204 | } | |
1205 | else if (rv == -1) | |
1206 | error ("Regular expression botch"); | |
1207 | } | |
1208 | if (feof (file)) { | |
1209 | if (!no_intty) { | |
ffa58356 | 1210 | file->_flag &= ~_IOEOF; /* why doesn't fseek do this ??!!??! */ |
ffa58356 ES |
1211 | Currline = saveln; |
1212 | Fseek (file, startline); | |
1213 | } | |
1214 | else { | |
1215 | pr ("\nPattern not found\n"); | |
1216 | end_it (); | |
1217 | } | |
1218 | error ("Pattern not found"); | |
1219 | } | |
1220 | } | |
1221 | ||
1222 | execute (filename, cmd, args) | |
1223 | char *filename; | |
1224 | char *cmd, *args; | |
1225 | { | |
1226 | int id; | |
1227 | ||
1228 | fflush (stdout); | |
1229 | reset_tty (); | |
1230 | while ((id = fork ()) < 0) | |
1231 | sleep (5); | |
1232 | if (id == 0) { | |
1233 | execv (cmd, &args); | |
1234 | write (2, "exec failed\n", 12); | |
1235 | exit (1); | |
1236 | } | |
1237 | signal (SIGINT, SIG_IGN); | |
1238 | signal (SIGQUIT, SIG_IGN); | |
ffa58356 ES |
1239 | if (catch_susp) |
1240 | signal(SIGTSTP, SIG_DFL); | |
ffa58356 ES |
1241 | wait (0); |
1242 | signal (SIGINT, end_it); | |
1243 | signal (SIGQUIT, onquit); | |
ffa58356 ES |
1244 | if (catch_susp) |
1245 | signal(SIGTSTP, onsusp); | |
ffa58356 ES |
1246 | set_tty (); |
1247 | pr ("------------------------\n"); | |
1248 | prompt (filename); | |
1249 | } | |
1250 | /* | |
1251 | ** Skip n lines in the file f | |
1252 | */ | |
1253 | ||
1254 | skiplns (n, f) | |
1255 | register int n; | |
1256 | register FILE *f; | |
1257 | { | |
1258 | register char c; | |
1259 | ||
1260 | while (n > 0) { | |
1261 | while ((c = Getc (f)) != '\n') | |
1262 | if (c == EOF) | |
1263 | return; | |
1264 | n--; | |
1265 | Currline++; | |
1266 | } | |
1267 | } | |
1268 | ||
1269 | /* | |
1270 | ** Skip nskip files in the file list (from the command line). Nskip may be | |
1271 | ** negative. | |
1272 | */ | |
1273 | ||
1274 | skipf (nskip) | |
1275 | register int nskip; | |
1276 | { | |
1277 | if (nskip == 0) return; | |
1278 | if (nskip > 0) { | |
1279 | if (fnum + nskip > nfiles - 1) | |
1280 | nskip = nfiles - fnum - 1; | |
1281 | } | |
1282 | else if (within) | |
1283 | ++fnum; | |
1284 | fnum += nskip; | |
1285 | if (fnum < 0) | |
1286 | fnum = 0; | |
35bd36fc | 1287 | pr ("\n...Skipping "); |
38ccf597 | 1288 | pr ("\n"); |
35bd36fc BJ |
1289 | if (clreol) |
1290 | cleareol (); | |
38ccf597 | 1291 | pr ("...Skipping "); |
ffa58356 ES |
1292 | pr (nskip > 0 ? "to file " : "back to file "); |
1293 | pr (fnames[fnum]); | |
38ccf597 | 1294 | pr ("\n"); |
35bd36fc BJ |
1295 | if (clreol) |
1296 | cleareol (); | |
38ccf597 | 1297 | pr ("\n"); |
ffa58356 ES |
1298 | --fnum; |
1299 | } | |
1300 | ||
1301 | /*----------------------------- Terminal I/O -------------------------------*/ | |
1302 | ||
1303 | initterm () | |
1304 | { | |
1305 | char buf[TBUFSIZ]; | |
1306 | char clearbuf[100]; | |
1307 | char *clearptr, *padstr; | |
ffa58356 | 1308 | int ldisc; |
54decef9 | 1309 | char *term; |
ffa58356 ES |
1310 | |
1311 | setbuf(stdout, obuf); | |
1312 | if (!(no_tty = gtty(1, &otty))) { | |
4ff0975e | 1313 | if ((term = getenv("TERM")) && tgetent(buf, term) <= 0) { |
35bd36fc | 1314 | dumb++; ul_opt = 0; |
ffa58356 ES |
1315 | } |
1316 | else { | |
1317 | if (((Lpp = tgetnum("li")) < 0) || tgetflag("hc")) { | |
1318 | hard++; /* Hard copy terminal */ | |
1319 | Lpp = 24; | |
1320 | } | |
1321 | if (tailequ (fnames[0], "page") || !hard && tgetflag("ns")) | |
1322 | noscroll++; | |
1323 | if ((Mcol = tgetnum("co")) < 0) | |
1324 | Mcol = 80; | |
1325 | Wrap = tgetflag("am"); | |
1326 | bad_so = tgetflag ("xs"); | |
1327 | clearptr = clearbuf; | |
1328 | eraseln = tgetstr("ce",&clearptr); | |
1329 | Clear = tgetstr("cl", &clearptr); | |
1330 | Senter = tgetstr("so", &clearptr); | |
1331 | Sexit = tgetstr("se", &clearptr); | |
35bd36fc BJ |
1332 | |
1333 | /* | |
1334 | * Set up for underlining: some terminals don't need it; | |
1335 | * others have start/stop sequences, still others have an | |
1336 | * underline char sequence which is assumed to move the | |
1337 | * cursor forward one character. If underline sequence | |
1338 | * isn't available, settle for standout sequence. | |
1339 | */ | |
1340 | ||
1341 | if (tgetflag("ul") || tgetflag("os")) | |
1342 | ul_opt = 0; | |
1343 | if ((chUL = tgetstr("uc", &clearptr)) == NULL ) | |
1344 | chUL = ""; | |
1345 | if ((ULenter = tgetstr("us", &clearptr)) == NULL && | |
1346 | (!*chUL) && (ULenter = tgetstr("so", &clearptr)) == NULL) | |
1347 | ULenter = ""; | |
1348 | if ((ULexit = tgetstr("ue", &clearptr)) == NULL && | |
1349 | (!*chUL) && (ULexit = tgetstr("se", &clearptr)) == NULL) | |
1350 | ULexit = ""; | |
1351 | ||
ffa58356 ES |
1352 | if (padstr = tgetstr("pc", &clearptr)) |
1353 | PC = *padstr; | |
38ccf597 | 1354 | Home = tgetstr("ho",&clearptr); |
4ff0975e | 1355 | if (Home == 0 && *Home == '\0') |
38ccf597 | 1356 | { |
35bd36fc BJ |
1357 | if ((cursorm = tgetstr("cm", &clearptr)) != NULL) { |
1358 | strcpy(cursorhome, tgoto(cursorm, 0, 0)); | |
38ccf597 BJ |
1359 | Home = cursorhome; |
1360 | } | |
1361 | } | |
35bd36fc | 1362 | EodClr = tgetstr("cd", &clearptr); |
ffa58356 ES |
1363 | } |
1364 | if ((shell = getenv("SHELL")) == NULL) | |
1365 | shell = "/bin/sh"; | |
1366 | } | |
1367 | no_intty = gtty(0, &otty); | |
1368 | gtty(2, &otty); | |
1369 | ospeed = otty.sg_ospeed; | |
1370 | slow_tty = ospeed < B1200; | |
1371 | hardtabs = !(otty.sg_flags & XTABS); | |
1372 | if (!no_tty) { | |
1373 | otty.sg_flags &= ~ECHO; | |
1374 | if (MBIT == CBREAK || !slow_tty) | |
1375 | otty.sg_flags |= MBIT; | |
1376 | } | |
1377 | } | |
1378 | ||
1379 | readch () | |
1380 | { | |
1381 | char ch; | |
1382 | extern int errno; | |
1383 | ||
1384 | if (read (2, &ch, 1) <= 0) | |
1385 | if (errno != EINTR) | |
1386 | exit(0); | |
1387 | else | |
1388 | ch = otty.sg_kill; | |
1389 | return (ch); | |
1390 | } | |
1391 | ||
1392 | static char BS = '\b'; | |
1393 | static char CARAT = '^'; | |
1394 | ||
1395 | ttyin (buf, nmax, pchar) | |
1396 | char buf[]; | |
1397 | register int nmax; | |
1398 | char pchar; | |
1399 | { | |
1400 | register char *sptr; | |
1401 | register char ch; | |
1402 | register int slash = 0; | |
1403 | int maxlen; | |
1404 | char cbuf; | |
1405 | ||
1406 | sptr = buf; | |
1407 | maxlen = 0; | |
1408 | while (sptr - buf < nmax) { | |
1409 | if (promptlen > maxlen) maxlen = promptlen; | |
1410 | ch = readch (); | |
1411 | if (ch == '\\') { | |
1412 | slash++; | |
1413 | } | |
1414 | else if ((ch == otty.sg_erase) && !slash) { | |
1415 | if (sptr > buf) { | |
1416 | --promptlen; | |
1417 | write (2, &BS, 1); | |
1418 | --sptr; | |
1419 | if ((*sptr < ' ' && *sptr != '\n') || *sptr == RUBOUT) { | |
1420 | --promptlen; | |
1421 | write (2, &BS, 1); | |
1422 | } | |
1423 | continue; | |
1424 | } | |
1425 | else { | |
1426 | if (!eraseln) promptlen = maxlen; | |
1427 | longjmp (restore, 1); | |
1428 | } | |
1429 | } | |
1430 | else if ((ch == otty.sg_kill) && !slash) { | |
1431 | if (hard) { | |
1432 | show (ch); | |
1433 | putchar ('\n'); | |
1434 | putchar (pchar); | |
1435 | } | |
1436 | else { | |
1437 | putchar ('\r'); | |
1438 | putchar (pchar); | |
1439 | if (eraseln) | |
1440 | erase (1); | |
1441 | promptlen = 1; | |
1442 | } | |
1443 | sptr = buf; | |
1444 | fflush (stdout); | |
1445 | continue; | |
1446 | } | |
1447 | if (slash && (ch == otty.sg_kill || ch == otty.sg_erase)) { | |
1448 | write (2, &BS, 1); | |
1449 | --sptr; | |
1450 | } | |
1451 | if (ch != '\\') | |
1452 | slash = 0; | |
1453 | *sptr++ = ch; | |
1454 | if ((ch < ' ' && ch != '\n' && ch != ESC) || ch == RUBOUT) { | |
1455 | ch += ch == RUBOUT ? -0100 : 0100; | |
1456 | write (2, &CARAT, 1); | |
1457 | promptlen++; | |
1458 | } | |
1459 | cbuf = ch; | |
1460 | if (ch != '\n' && ch != ESC) { | |
1461 | write (2, &cbuf, 1); | |
1462 | promptlen++; | |
1463 | } | |
1464 | else | |
1465 | break; | |
1466 | } | |
1467 | *--sptr = '\0'; | |
1468 | if (!eraseln) promptlen = maxlen; | |
1469 | if (sptr - buf >= nmax - 1) | |
1470 | error ("Line too long"); | |
1471 | } | |
1472 | ||
1473 | expand (outbuf, inbuf) | |
1474 | char *outbuf; | |
1475 | char *inbuf; | |
1476 | { | |
1477 | register char *instr; | |
1478 | register char *outstr; | |
1479 | register char ch; | |
1480 | char temp[200]; | |
1481 | int changed = 0; | |
1482 | ||
1483 | instr = inbuf; | |
1484 | outstr = temp; | |
1485 | while ((ch = *instr++) != '\0') | |
1486 | switch (ch) { | |
1487 | case '%': | |
1488 | if (!no_intty) { | |
1489 | strcpy (outstr, fnames[fnum]); | |
1490 | outstr += strlen (fnames[fnum]); | |
1491 | changed++; | |
1492 | } | |
1493 | else | |
1494 | *outstr++ = ch; | |
1495 | break; | |
1496 | case '!': | |
1497 | if (!shellp) | |
1498 | error ("No previous command to substitute for"); | |
1499 | strcpy (outstr, shell_line); | |
1500 | outstr += strlen (shell_line); | |
1501 | changed++; | |
1502 | break; | |
1503 | case '\\': | |
1504 | if (*instr == '%' || *instr == '!') { | |
1505 | *outstr++ = *instr++; | |
1506 | break; | |
1507 | } | |
1508 | default: | |
1509 | *outstr++ = ch; | |
1510 | } | |
1511 | *outstr++ = '\0'; | |
1512 | strcpy (outbuf, temp); | |
1513 | return (changed); | |
1514 | } | |
1515 | ||
1516 | show (ch) | |
1517 | register char ch; | |
1518 | { | |
1519 | char cbuf; | |
1520 | ||
1521 | if ((ch < ' ' && ch != '\n' && ch != ESC) || ch == RUBOUT) { | |
1522 | ch += ch == RUBOUT ? -0100 : 0100; | |
1523 | write (2, &CARAT, 1); | |
1524 | promptlen++; | |
1525 | } | |
1526 | cbuf = ch; | |
1527 | write (2, &cbuf, 1); | |
1528 | promptlen++; | |
1529 | } | |
1530 | ||
1531 | error (mess) | |
1532 | char *mess; | |
1533 | { | |
35bd36fc BJ |
1534 | if (clreol) |
1535 | cleareol (); | |
1536 | else | |
1537 | kill_line (); | |
ffa58356 ES |
1538 | promptlen += strlen (mess); |
1539 | if (Senter && Sexit) { | |
1540 | tputs (Senter, 1, putch); | |
1541 | pr(mess); | |
1542 | tputs (Sexit, 1, putch); | |
1543 | } | |
1544 | else | |
1545 | pr (mess); | |
1546 | fflush(stdout); | |
1547 | errors++; | |
1548 | longjmp (restore, 1); | |
1549 | } | |
1550 | ||
1551 | ||
1552 | set_tty () | |
1553 | { | |
1554 | otty.sg_flags |= MBIT; | |
1555 | otty.sg_flags &= ~ECHO; | |
1556 | stty(2, &otty); | |
1557 | } | |
1558 | ||
1559 | reset_tty () | |
1560 | { | |
1561 | otty.sg_flags |= ECHO; | |
1562 | otty.sg_flags &= ~MBIT; | |
1563 | stty(2, &otty); | |
1564 | } | |
1565 | ||
1566 | rdline (f) | |
1567 | register FILE *f; | |
1568 | { | |
1569 | register char c; | |
1570 | register char *p; | |
1571 | ||
1572 | p = Line; | |
1573 | while ((c = Getc (f)) != '\n' && c != EOF && p - Line < LINSIZ - 1) | |
1574 | *p++ = c; | |
1575 | if (c == '\n') | |
1576 | Currline++; | |
1577 | *p = '\0'; | |
1578 | } | |
1579 | ||
1580 | /* Come here when we get a suspend signal from the terminal */ | |
1581 | ||
ffa58356 ES |
1582 | onsusp () |
1583 | { | |
1584 | reset_tty (); | |
1585 | fflush (stdout); | |
1586 | /* Send the TSTP signal to suspend our process group */ | |
1587 | kill (0, SIGTSTP); | |
1588 | /* Pause for station break */ | |
1589 | ||
1590 | /* We're back */ | |
1591 | signal (SIGTSTP, onsusp); | |
1592 | set_tty (); | |
1593 | if (inwait) | |
1594 | longjmp (restore); | |
1595 | } |