Commit | Line | Data |
---|---|---|
718f6e88 | 1 | static char *sccsid = "@(#)more.c 4.11 (Berkeley) 83/03/17"; |
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 | { | |
718f6e88 KL |
266 | for (dlines = 0; *s != '\0'; s++) |
267 | { | |
268 | switch (*s) | |
269 | { | |
270 | case '0': case '1': case '2': | |
271 | case '3': case '4': case '5': | |
272 | case '6': case '7': case '8': | |
273 | case '9': | |
274 | dlines = dlines*10 + *s - '0'; | |
275 | break; | |
276 | case 'd': | |
277 | dum_opt = 1; | |
278 | break; | |
279 | case 'l': | |
280 | stop_opt = 0; | |
281 | break; | |
282 | case 'f': | |
283 | fold_opt = 0; | |
284 | break; | |
285 | case 'p': | |
286 | noscroll++; | |
287 | break; | |
288 | case 'c': | |
289 | clreol++; | |
290 | break; | |
291 | case 's': | |
292 | ssp_opt = 1; | |
293 | break; | |
294 | case 'u': | |
295 | ul_opt = 0; | |
296 | break; | |
297 | } | |
298 | } | |
38ccf597 BJ |
299 | } |
300 | ||
301 | ||
ffa58356 ES |
302 | /* |
303 | ** Check whether the file named by fs is an ASCII file which the user may | |
304 | ** access. If it is, return the opened file. Otherwise return NULL. | |
305 | */ | |
306 | ||
307 | FILE * | |
308 | checkf (fs, clearfirst) | |
309 | register char *fs; | |
310 | int *clearfirst; | |
311 | { | |
312 | struct stat stbuf; | |
313 | register FILE *f; | |
314 | char c; | |
315 | ||
316 | if (stat (fs, &stbuf) == -1) { | |
317 | fflush(stdout); | |
35bd36fc BJ |
318 | if (clreol) |
319 | cleareol (); | |
ffa58356 ES |
320 | perror(fs); |
321 | return (NULL); | |
322 | } | |
323 | if ((stbuf.st_mode & S_IFMT) == S_IFDIR) { | |
324 | printf("\n*** %s: directory ***\n\n", fs); | |
325 | return (NULL); | |
326 | } | |
327 | if ((f=Fopen(fs, "r")) == NULL) { | |
328 | fflush(stdout); | |
329 | perror(fs); | |
330 | return (NULL); | |
331 | } | |
332 | c = Getc(f); | |
333 | ||
334 | /* Try to see whether it is an ASCII file */ | |
335 | ||
336 | switch ((c | *f->_ptr << 8) & 0177777) { | |
337 | case 0405: | |
338 | case 0407: | |
339 | case 0410: | |
340 | case 0411: | |
341 | case 0413: | |
342 | case 0177545: | |
343 | printf("\n******** %s: Not a text file ********\n\n", fs); | |
344 | fclose (f); | |
345 | return (NULL); | |
346 | default: | |
347 | break; | |
348 | } | |
349 | if (c == '\f') | |
350 | *clearfirst = 1; | |
351 | else { | |
352 | *clearfirst = 0; | |
353 | Ungetc (c, f); | |
354 | } | |
355 | if ((file_size = stbuf.st_size) == 0) | |
356 | file_size = 0x7fffffffffffffffL; | |
357 | return (f); | |
358 | } | |
359 | ||
360 | /* | |
361 | ** A real function, for the tputs routine in termlib | |
362 | */ | |
363 | ||
364 | putch (ch) | |
365 | char ch; | |
366 | { | |
367 | putchar (ch); | |
368 | } | |
369 | ||
370 | /* | |
371 | ** Print out the contents of the file f, one screenful at a time. | |
372 | */ | |
373 | ||
374 | #define STOP -10 | |
375 | ||
376 | screen (f, num_lines) | |
377 | register FILE *f; | |
378 | register int num_lines; | |
379 | { | |
380 | register int c; | |
381 | register int nchars; | |
35bd36fc BJ |
382 | int length; /* length of current line */ |
383 | static int prev_len = 1; /* length of previous line */ | |
ffa58356 ES |
384 | |
385 | for (;;) { | |
386 | while (num_lines > 0 && !Pause) { | |
387 | if ((nchars = getline (f, &length)) == EOF) | |
38ccf597 | 388 | { |
35bd36fc BJ |
389 | if (clreol) |
390 | clreos(); | |
ffa58356 | 391 | return; |
38ccf597 | 392 | } |
35bd36fc BJ |
393 | if (ssp_opt && length == 0 && prev_len == 0) |
394 | continue; | |
395 | prev_len = length; | |
ffa58356 ES |
396 | if (bad_so || (Senter && *Senter == ' ') && promptlen > 0) |
397 | erase (0); | |
35bd36fc BJ |
398 | /* must clear before drawing line since tabs on some terminals |
399 | * do not erase what they tab over. | |
400 | */ | |
401 | if (clreol) | |
402 | cleareol (); | |
ffa58356 ES |
403 | prbuf (Line, length); |
404 | if (nchars < promptlen) | |
405 | erase (nchars); /* erase () sets promptlen to 0 */ | |
406 | else promptlen = 0; | |
35bd36fc BJ |
407 | /* is this needed? |
408 | * if (clreol) | |
409 | * cleareol(); /* must clear again in case we wrapped * | |
410 | */ | |
ffa58356 ES |
411 | if (nchars < Mcol || !fold_opt) |
412 | putchar('\n'); | |
413 | if (nchars == STOP) | |
414 | break; | |
415 | num_lines--; | |
416 | } | |
417 | fflush(stdout); | |
418 | if ((c = Getc(f)) == EOF) | |
38ccf597 | 419 | { |
35bd36fc BJ |
420 | if (clreol) |
421 | clreos (); | |
ffa58356 | 422 | return; |
38ccf597 BJ |
423 | } |
424 | ||
35bd36fc BJ |
425 | if (Pause && clreol) |
426 | clreos (); | |
ffa58356 ES |
427 | Ungetc (c, f); |
428 | setjmp (restore); | |
429 | Pause = 0; startup = 0; | |
430 | if ((num_lines = command (NULL, f)) == 0) | |
431 | return; | |
432 | if (hard && promptlen > 0) | |
433 | erase (0); | |
a97c843b | 434 | if (noscroll && num_lines >= dlines) |
38ccf597 | 435 | { |
35bd36fc BJ |
436 | if (clreol) |
437 | home(); | |
438 | else | |
439 | doclear (); | |
38ccf597 | 440 | } |
ffa58356 ES |
441 | screen_start.line = Currline; |
442 | screen_start.chrctr = Ftell (f); | |
443 | } | |
444 | } | |
445 | ||
446 | /* | |
447 | ** Come here if a quit signal is received | |
448 | */ | |
449 | ||
450 | onquit() | |
451 | { | |
452 | signal(SIGQUIT, SIG_IGN); | |
453 | if (!inwait) { | |
454 | putchar ('\n'); | |
455 | if (!startup) { | |
456 | signal(SIGQUIT, onquit); | |
457 | longjmp (restore, 1); | |
458 | } | |
459 | else | |
460 | Pause++; | |
461 | } | |
462 | else if (!dum_opt && notell) { | |
463 | write (2, "[Use q or Q to quit]", 20); | |
464 | promptlen += 20; | |
465 | notell = 0; | |
466 | } | |
467 | signal(SIGQUIT, onquit); | |
468 | } | |
469 | ||
470 | /* | |
471 | ** Clean up terminal state and exit. Also come here if interrupt signal received | |
472 | */ | |
473 | ||
474 | end_it () | |
475 | { | |
476 | ||
477 | reset_tty (); | |
35bd36fc BJ |
478 | if (clreol) { |
479 | putchar ('\r'); | |
480 | clreos (); | |
481 | fflush (stdout); | |
482 | } | |
38ccf597 | 483 | else if (!clreol && (promptlen > 0)) { |
ffa58356 ES |
484 | kill_line (); |
485 | fflush (stdout); | |
486 | } | |
487 | else | |
488 | write (2, "\n", 1); | |
489 | _exit(0); | |
490 | } | |
491 | ||
492 | copy_file(f) | |
493 | register FILE *f; | |
494 | { | |
495 | register int c; | |
496 | ||
497 | while ((c = getc(f)) != EOF) | |
498 | putchar(c); | |
499 | } | |
500 | ||
501 | /* Simplified printf function */ | |
502 | ||
503 | printf (fmt, args) | |
504 | register char *fmt; | |
505 | int args; | |
506 | { | |
507 | register int *argp; | |
508 | register char ch; | |
509 | register int ccount; | |
510 | ||
511 | ccount = 0; | |
512 | argp = &args; | |
513 | while (*fmt) { | |
514 | while ((ch = *fmt++) != '%') { | |
515 | if (ch == '\0') | |
516 | return (ccount); | |
517 | ccount++; | |
518 | putchar (ch); | |
519 | } | |
520 | switch (*fmt++) { | |
521 | case 'd': | |
522 | ccount += printd (*argp); | |
523 | break; | |
524 | case 's': | |
525 | ccount += pr ((char *)*argp); | |
526 | break; | |
527 | case '%': | |
528 | ccount++; | |
529 | argp--; | |
530 | putchar ('%'); | |
531 | break; | |
532 | case '0': | |
533 | return (ccount); | |
534 | default: | |
535 | break; | |
536 | } | |
537 | ++argp; | |
538 | } | |
539 | return (ccount); | |
540 | ||
541 | } | |
542 | ||
543 | /* | |
544 | ** Print an integer as a string of decimal digits, | |
545 | ** returning the length of the print representation. | |
546 | */ | |
547 | ||
548 | printd (n) | |
549 | int n; | |
550 | { | |
551 | int a, nchars; | |
552 | ||
553 | if (a = n/10) | |
554 | nchars = 1 + printd(a); | |
555 | else | |
556 | nchars = 1; | |
557 | putchar (n % 10 + '0'); | |
558 | return (nchars); | |
559 | } | |
560 | ||
561 | /* Put the print representation of an integer into a string */ | |
562 | static char *sptr; | |
563 | ||
564 | scanstr (n, str) | |
565 | int n; | |
566 | char *str; | |
567 | { | |
568 | sptr = str; | |
718f6e88 | 569 | Sprintf (n); |
ffa58356 ES |
570 | *sptr = '\0'; |
571 | } | |
572 | ||
718f6e88 | 573 | Sprintf (n) |
ffa58356 ES |
574 | { |
575 | int a; | |
576 | ||
577 | if (a = n/10) | |
718f6e88 | 578 | Sprintf (a); |
ffa58356 ES |
579 | *sptr++ = n % 10 + '0'; |
580 | } | |
581 | ||
582 | static char bell = ctrl(G); | |
583 | ||
584 | strlen (s) | |
585 | char *s; | |
586 | { | |
587 | register char *p; | |
588 | ||
589 | p = s; | |
590 | while (*p++) | |
591 | ; | |
592 | return (p - s - 1); | |
593 | } | |
594 | ||
595 | /* See whether the last component of the path name "path" is equal to the | |
596 | ** string "string" | |
597 | */ | |
598 | ||
599 | tailequ (path, string) | |
600 | char *path; | |
601 | register char *string; | |
602 | { | |
603 | register char *tail; | |
604 | ||
605 | tail = path + strlen(path); | |
606 | while (tail >= path) | |
607 | if (*(--tail) == '/') | |
608 | break; | |
609 | ++tail; | |
610 | while (*tail++ == *string++) | |
611 | if (*tail == '\0') | |
612 | return(1); | |
613 | return(0); | |
614 | } | |
615 | ||
616 | prompt (filename) | |
617 | char *filename; | |
618 | { | |
35bd36fc BJ |
619 | if (clreol) |
620 | cleareol (); | |
38ccf597 | 621 | else if (promptlen > 0) |
ffa58356 ES |
622 | kill_line (); |
623 | if (!hard) { | |
624 | promptlen = 8; | |
625 | if (Senter && Sexit) | |
626 | tputs (Senter, 1, putch); | |
35bd36fc BJ |
627 | if (clreol) |
628 | cleareol (); | |
ffa58356 ES |
629 | pr("--More--"); |
630 | if (filename != NULL) { | |
631 | promptlen += printf ("(Next file: %s)", filename); | |
632 | } | |
633 | else if (!no_intty) { | |
634 | promptlen += printf ("(%d%%)", (int)((file_pos * 100) / file_size)); | |
635 | } | |
636 | if (dum_opt) { | |
637 | promptlen += pr("[Hit space to continue, Rubout to abort]"); | |
638 | } | |
639 | if (Senter && Sexit) | |
640 | tputs (Sexit, 1, putch); | |
35bd36fc BJ |
641 | if (clreol) |
642 | clreos (); | |
ffa58356 ES |
643 | fflush(stdout); |
644 | } | |
645 | else | |
646 | write (2, &bell, 1); | |
647 | inwait++; | |
648 | } | |
649 | ||
650 | /* | |
651 | ** Get a logical line | |
652 | */ | |
653 | ||
654 | getline(f, length) | |
655 | register FILE *f; | |
656 | int *length; | |
657 | { | |
658 | register int c; | |
659 | register char *p; | |
660 | register int column; | |
661 | static int colflg; | |
662 | ||
663 | p = Line; | |
664 | column = 0; | |
665 | c = Getc (f); | |
666 | if (colflg && c == '\n') { | |
667 | Currline++; | |
668 | c = Getc (f); | |
669 | } | |
670 | while (p < &Line[LINSIZ - 1]) { | |
671 | if (c == EOF) { | |
672 | if (p > Line) { | |
673 | *p = '\0'; | |
674 | *length = p - Line; | |
675 | return (column); | |
676 | } | |
677 | *length = p - Line; | |
678 | return (EOF); | |
679 | } | |
680 | if (c == '\n') { | |
681 | Currline++; | |
682 | break; | |
683 | } | |
684 | *p++ = c; | |
685 | if (c == '\t') | |
686 | if (hardtabs && column < promptlen && !hard) { | |
687 | if (eraseln && !dumb) { | |
688 | column = 1 + (column | 7); | |
689 | tputs (eraseln, 1, putch); | |
690 | promptlen = 0; | |
691 | } | |
692 | else { | |
693 | for (--p; column & 7 && p < &Line[LINSIZ - 1]; column++) { | |
694 | *p++ = ' '; | |
695 | } | |
696 | if (column >= promptlen) promptlen = 0; | |
697 | } | |
698 | } | |
699 | else | |
700 | column = 1 + (column | 7); | |
d1b174c2 | 701 | else if (c == '\b' && column > 0) |
ffa58356 ES |
702 | column--; |
703 | else if (c == '\r') | |
704 | column = 0; | |
705 | else if (c == '\f' && stop_opt) { | |
706 | p[-1] = '^'; | |
707 | *p++ = 'L'; | |
708 | column += 2; | |
709 | Pause++; | |
710 | } | |
711 | else if (c == EOF) { | |
712 | *length = p - Line; | |
713 | return (column); | |
714 | } | |
715 | else if (c >= ' ' && c != RUBOUT) | |
716 | column++; | |
717 | if (column >= Mcol && fold_opt) break; | |
718 | c = Getc (f); | |
719 | } | |
720 | if (column >= Mcol && Mcol > 0) { | |
721 | if (!Wrap) { | |
722 | *p++ = '\n'; | |
723 | } | |
724 | } | |
725 | colflg = column == Mcol && fold_opt; | |
726 | *length = p - Line; | |
727 | *p = 0; | |
728 | return (column); | |
729 | } | |
730 | ||
731 | /* | |
732 | ** Erase the rest of the prompt, assuming we are starting at column col. | |
733 | */ | |
734 | ||
735 | erase (col) | |
736 | register int col; | |
737 | { | |
738 | ||
739 | if (promptlen == 0) | |
740 | return; | |
741 | if (hard) { | |
742 | putchar ('\n'); | |
743 | } | |
744 | else { | |
745 | if (col == 0) | |
746 | putchar ('\r'); | |
747 | if (!dumb && eraseln) | |
748 | tputs (eraseln, 1, putch); | |
749 | else | |
750 | for (col = promptlen - col; col > 0; col--) | |
751 | putchar (' '); | |
752 | } | |
753 | promptlen = 0; | |
754 | } | |
755 | ||
756 | /* | |
757 | ** Erase the current line entirely | |
758 | */ | |
759 | ||
760 | kill_line () | |
761 | { | |
762 | erase (0); | |
763 | if (!eraseln || dumb) putchar ('\r'); | |
764 | } | |
765 | ||
38ccf597 BJ |
766 | /* |
767 | * force clear to end of line | |
768 | */ | |
769 | cleareol() | |
770 | { | |
35bd36fc | 771 | tputs(eraseln, 1, putch); |
38ccf597 BJ |
772 | } |
773 | ||
35bd36fc | 774 | clreos() |
38ccf597 | 775 | { |
35bd36fc | 776 | tputs(EodClr, 1, putch); |
38ccf597 BJ |
777 | } |
778 | ||
ffa58356 ES |
779 | /* |
780 | ** Print string and return number of characters | |
781 | */ | |
782 | ||
783 | pr(s1) | |
784 | char *s1; | |
785 | { | |
786 | register char *s; | |
787 | register char c; | |
788 | ||
789 | for (s = s1; c = *s++; ) | |
790 | putchar(c); | |
791 | return (s - s1 - 1); | |
792 | } | |
793 | ||
794 | ||
795 | /* Print a buffer of n characters */ | |
796 | ||
797 | prbuf (s, n) | |
798 | register char *s; | |
799 | register int n; | |
800 | { | |
35bd36fc BJ |
801 | char c; /* next ouput character */ |
802 | register int state; /* next output char's UL state */ | |
803 | static int pstate = 0; /* current terminal UL state (off) */ | |
804 | ||
805 | while (--n >= 0) | |
806 | if (!ul_opt) | |
807 | putchar (*s++); | |
808 | else { | |
809 | if (n >= 2 && s[0] == '_' && s[1] == '\b') { | |
810 | n -= 2; | |
811 | s += 2; | |
812 | c = *s++; | |
813 | state = 1; | |
814 | } else if (n >= 2 && s[1] == '\b' && s[2] == '_') { | |
815 | n -= 2; | |
816 | c = *s++; | |
817 | s += 2; | |
818 | state = 1; | |
819 | } else { | |
820 | c = *s++; | |
821 | state = 0; | |
822 | } | |
823 | if (state != pstate) | |
824 | tputs(state ? ULenter : ULexit, 1, putch); | |
825 | pstate = state; | |
826 | putchar(c); | |
827 | if (state && *chUL) { | |
828 | pr(chBS); | |
829 | tputs(chUL, 1, putch); | |
830 | } | |
831 | } | |
ffa58356 ES |
832 | } |
833 | ||
834 | /* | |
835 | ** Clear the screen | |
836 | */ | |
837 | ||
838 | doclear() | |
839 | { | |
840 | if (Clear && !hard) { | |
841 | tputs(Clear, 1, putch); | |
842 | ||
843 | /* Put out carriage return so that system doesn't | |
844 | ** get confused by escape sequences when expanding tabs | |
845 | */ | |
846 | putchar ('\r'); | |
847 | promptlen = 0; | |
848 | } | |
849 | } | |
850 | ||
38ccf597 BJ |
851 | /* |
852 | * Go to home position | |
853 | */ | |
854 | home() | |
855 | { | |
856 | tputs(Home,1,putch); | |
857 | } | |
858 | ||
ffa58356 ES |
859 | static int lastcmd, lastarg, lastp; |
860 | static int lastcolon; | |
861 | char shell_line[132]; | |
862 | ||
863 | /* | |
864 | ** Read a command and do it. A command consists of an optional integer | |
865 | ** argument followed by the command character. Return the number of lines | |
866 | ** to display in the next screenful. If there is nothing more to display | |
867 | ** in the current file, zero is returned. | |
868 | */ | |
869 | ||
870 | command (filename, f) | |
871 | char *filename; | |
872 | register FILE *f; | |
873 | { | |
874 | register int nlines; | |
875 | register int retval; | |
876 | register char c; | |
877 | char colonch; | |
878 | FILE *helpf; | |
879 | int done; | |
880 | char comchar, cmdbuf[80], *p; | |
881 | ||
882 | #define ret(val) retval=val;done++;break | |
883 | ||
884 | done = 0; | |
885 | if (!errors) | |
886 | prompt (filename); | |
887 | else | |
888 | errors = 0; | |
889 | if (MBIT == RAW && slow_tty) { | |
890 | otty.sg_flags |= MBIT; | |
891 | stty(2, &otty); | |
892 | } | |
893 | for (;;) { | |
894 | nlines = number (&comchar); | |
895 | lastp = colonch = 0; | |
896 | if (comchar == '.') { /* Repeat last command */ | |
897 | lastp++; | |
898 | comchar = lastcmd; | |
899 | nlines = lastarg; | |
900 | if (lastcmd == ':') | |
901 | colonch = lastcolon; | |
902 | } | |
903 | lastcmd = comchar; | |
904 | lastarg = nlines; | |
905 | if (comchar == otty.sg_erase) { | |
906 | kill_line (); | |
907 | prompt (filename); | |
908 | continue; | |
909 | } | |
910 | switch (comchar) { | |
911 | case ':': | |
912 | retval = colon (filename, colonch, nlines); | |
913 | if (retval >= 0) | |
914 | done++; | |
915 | break; | |
916 | case ' ': | |
917 | case 'z': | |
918 | if (nlines == 0) nlines = dlines; | |
919 | else if (comchar == 'z') dlines = nlines; | |
920 | ret (nlines); | |
921 | case 'd': | |
922 | case ctrl(D): | |
923 | if (nlines != 0) nscroll = nlines; | |
924 | ret (nscroll); | |
925 | case RUBOUT: | |
926 | case 'q': | |
927 | case 'Q': | |
928 | end_it (); | |
929 | case 's': | |
930 | case 'f': | |
931 | if (nlines == 0) nlines++; | |
932 | if (comchar == 'f') | |
933 | nlines *= dlines; | |
934 | putchar ('\r'); | |
935 | erase (0); | |
35bd36fc BJ |
936 | printf ("\n"); |
937 | if (clreol) | |
938 | cleareol (); | |
939 | printf ("...skipping %d line", nlines); | |
ffa58356 | 940 | if (nlines > 1) |
35bd36fc | 941 | pr ("s\n"); |
ffa58356 | 942 | else |
35bd36fc BJ |
943 | pr ("\n"); |
944 | ||
945 | if (clreol) | |
946 | cleareol (); | |
947 | pr ("\n"); | |
948 | ||
ffa58356 ES |
949 | while (nlines > 0) { |
950 | while ((c = Getc (f)) != '\n') | |
951 | if (c == EOF) { | |
952 | retval = 0; | |
953 | done++; | |
954 | goto endsw; | |
955 | } | |
956 | Currline++; | |
957 | nlines--; | |
958 | } | |
959 | ret (dlines); | |
960 | case '\n': | |
961 | if (nlines != 0) | |
962 | dlines = nlines; | |
963 | else | |
964 | nlines = 1; | |
965 | ret (nlines); | |
966 | case '\f': | |
967 | if (!no_intty) { | |
968 | doclear (); | |
969 | Fseek (f, screen_start.chrctr); | |
970 | Currline = screen_start.line; | |
971 | ret (dlines); | |
972 | } | |
973 | else { | |
974 | write (2, &bell, 1); | |
975 | break; | |
976 | } | |
977 | case '\'': | |
978 | if (!no_intty) { | |
979 | kill_line (); | |
980 | pr ("\n***Back***\n\n"); | |
981 | Fseek (f, context.chrctr); | |
982 | Currline = context.line; | |
983 | ret (dlines); | |
984 | } | |
985 | else { | |
986 | write (2, &bell, 1); | |
987 | break; | |
988 | } | |
989 | case '=': | |
990 | kill_line (); | |
991 | promptlen = printd (Currline); | |
992 | fflush (stdout); | |
993 | break; | |
994 | case 'n': | |
995 | lastp++; | |
996 | case '/': | |
997 | if (nlines == 0) nlines++; | |
998 | kill_line (); | |
999 | pr ("/"); | |
1000 | promptlen = 1; | |
1001 | fflush (stdout); | |
1002 | if (lastp) { | |
1003 | write (2,"\r", 1); | |
1004 | search (NULL, f, nlines); /* Use previous r.e. */ | |
1005 | } | |
1006 | else { | |
1007 | ttyin (cmdbuf, 78, '/'); | |
1008 | write (2, "\r", 1); | |
1009 | search (cmdbuf, f, nlines); | |
1010 | } | |
38ccf597 | 1011 | ret (dlines-1); |
ffa58356 ES |
1012 | case '!': |
1013 | do_shell (filename); | |
1014 | break; | |
1015 | case 'h': | |
1016 | if ((helpf = fopen (HELPFILE, "r")) == NULL) | |
1017 | error ("Can't open help file"); | |
1018 | if (noscroll) doclear (); | |
1019 | copy_file (helpf); | |
1020 | close (helpf); | |
1021 | prompt (filename); | |
1022 | break; | |
1023 | case 'v': /* This case should go right before default */ | |
1024 | if (!no_intty) { | |
1025 | kill_line (); | |
1026 | cmdbuf[0] = '+'; | |
1027 | scanstr (Currline, &cmdbuf[1]); | |
1028 | pr ("vi "); pr (cmdbuf); putchar (' '); pr (fnames[fnum]); | |
1029 | execute (filename, VI, "vi", cmdbuf, fnames[fnum], 0); | |
1030 | break; | |
1031 | } | |
1032 | default: | |
1033 | write (2, &bell, 1); | |
1034 | break; | |
1035 | } | |
1036 | if (done) break; | |
1037 | } | |
1038 | putchar ('\r'); | |
1039 | endsw: | |
1040 | inwait = 0; | |
1041 | notell++; | |
1042 | if (MBIT == RAW && slow_tty) { | |
1043 | otty.sg_flags &= ~MBIT; | |
1044 | stty(2, &otty); | |
1045 | } | |
1046 | return (retval); | |
1047 | } | |
1048 | ||
1049 | char ch; | |
1050 | ||
1051 | /* | |
1052 | * Execute a colon-prefixed command. | |
1053 | * Returns <0 if not a command that should cause | |
1054 | * more of the file to be printed. | |
1055 | */ | |
1056 | ||
1057 | colon (filename, cmd, nlines) | |
1058 | char *filename; | |
1059 | int cmd; | |
1060 | int nlines; | |
1061 | { | |
1062 | if (cmd == 0) | |
1063 | ch = readch (); | |
1064 | else | |
1065 | ch = cmd; | |
1066 | lastcolon = ch; | |
1067 | switch (ch) { | |
1068 | case 'f': | |
1069 | kill_line (); | |
1070 | if (!no_intty) | |
1071 | promptlen = printf ("\"%s\" line %d", fnames[fnum], Currline); | |
1072 | else | |
1073 | promptlen = printf ("[Not a file] line %d", Currline); | |
1074 | fflush (stdout); | |
1075 | return (-1); | |
1076 | case 'n': | |
1077 | if (nlines == 0) { | |
1078 | if (fnum >= nfiles - 1) | |
1079 | end_it (); | |
1080 | nlines++; | |
1081 | } | |
1082 | putchar ('\r'); | |
1083 | erase (0); | |
1084 | skipf (nlines); | |
1085 | return (0); | |
1086 | case 'p': | |
1087 | if (no_intty) { | |
1088 | write (2, &bell, 1); | |
1089 | return (-1); | |
1090 | } | |
1091 | putchar ('\r'); | |
1092 | erase (0); | |
1093 | if (nlines == 0) | |
1094 | nlines++; | |
1095 | skipf (-nlines); | |
1096 | return (0); | |
1097 | case '!': | |
1098 | do_shell (filename); | |
1099 | return (-1); | |
1100 | case 'q': | |
1101 | case 'Q': | |
1102 | end_it (); | |
1103 | default: | |
1104 | write (2, &bell, 1); | |
1105 | return (-1); | |
1106 | } | |
1107 | } | |
1108 | ||
1109 | /* | |
1110 | ** Read a decimal number from the terminal. Set cmd to the non-digit which | |
1111 | ** terminates the number. | |
1112 | */ | |
1113 | ||
1114 | number(cmd) | |
1115 | char *cmd; | |
1116 | { | |
1117 | register int i; | |
1118 | ||
1119 | i = 0; ch = otty.sg_kill; | |
1120 | for (;;) { | |
1121 | ch = readch (); | |
1122 | if (ch >= '0' && ch <= '9') | |
1123 | i = i*10 + ch - '0'; | |
1124 | else if (ch == otty.sg_kill) | |
1125 | i = 0; | |
1126 | else { | |
1127 | *cmd = ch; | |
1128 | break; | |
1129 | } | |
1130 | } | |
1131 | return (i); | |
1132 | } | |
1133 | ||
1134 | do_shell (filename) | |
1135 | char *filename; | |
1136 | { | |
1137 | char cmdbuf[80]; | |
1138 | ||
1139 | kill_line (); | |
1140 | pr ("!"); | |
1141 | fflush (stdout); | |
1142 | promptlen = 1; | |
1143 | if (lastp) | |
1144 | pr (shell_line); | |
1145 | else { | |
1146 | ttyin (cmdbuf, 78, '!'); | |
1147 | if (expand (shell_line, cmdbuf)) { | |
1148 | kill_line (); | |
1149 | promptlen = printf ("!%s", shell_line); | |
1150 | } | |
1151 | } | |
1152 | fflush (stdout); | |
1153 | write (2, "\n", 1); | |
1154 | promptlen = 0; | |
1155 | shellp = 1; | |
1156 | execute (filename, shell, shell, "-c", shell_line, 0); | |
1157 | } | |
1158 | ||
1159 | /* | |
1160 | ** Search for nth ocurrence of regular expression contained in buf in the file | |
1161 | */ | |
1162 | ||
1163 | search (buf, file, n) | |
1164 | char buf[]; | |
1165 | FILE *file; | |
1166 | register int n; | |
1167 | { | |
1168 | long startline = Ftell (file); | |
1169 | register long line1 = startline; | |
1170 | register long line2 = startline; | |
1171 | register long line3 = startline; | |
1172 | register int lncount; | |
1173 | int saveln, rv, re_exec(); | |
1174 | char *s, *re_comp(); | |
1175 | ||
1176 | context.line = saveln = Currline; | |
1177 | context.chrctr = startline; | |
1178 | lncount = 0; | |
1179 | if ((s = re_comp (buf)) != 0) | |
1180 | error (s); | |
1181 | while (!feof (file)) { | |
1182 | line3 = line2; | |
1183 | line2 = line1; | |
1184 | line1 = Ftell (file); | |
1185 | rdline (file); | |
1186 | lncount++; | |
1187 | if ((rv = re_exec (Line)) == 1) | |
1188 | if (--n == 0) { | |
1189 | if (lncount > 3 || (lncount > 1 && no_intty)) | |
38ccf597 BJ |
1190 | { |
1191 | pr ("\n"); | |
35bd36fc BJ |
1192 | if (clreol) |
1193 | cleareol (); | |
38ccf597 BJ |
1194 | pr("...skipping\n"); |
1195 | } | |
ffa58356 ES |
1196 | if (!no_intty) { |
1197 | Currline -= (lncount >= 3 ? 3 : lncount); | |
1198 | Fseek (file, line3); | |
35bd36fc BJ |
1199 | if (noscroll) |
1200 | if (clreol) { | |
1201 | home (); | |
1202 | cleareol (); | |
1203 | } | |
1204 | else | |
1205 | doclear (); | |
ffa58356 ES |
1206 | } |
1207 | else { | |
1208 | kill_line (); | |
35bd36fc BJ |
1209 | if (noscroll) |
1210 | if (clreol) { | |
1211 | home (); | |
1212 | cleareol (); | |
1213 | } | |
1214 | else | |
1215 | doclear (); | |
ffa58356 ES |
1216 | pr (Line); |
1217 | putchar ('\n'); | |
1218 | } | |
1219 | break; | |
1220 | } | |
1221 | else if (rv == -1) | |
1222 | error ("Regular expression botch"); | |
1223 | } | |
1224 | if (feof (file)) { | |
1225 | if (!no_intty) { | |
ffa58356 | 1226 | file->_flag &= ~_IOEOF; /* why doesn't fseek do this ??!!??! */ |
ffa58356 ES |
1227 | Currline = saveln; |
1228 | Fseek (file, startline); | |
1229 | } | |
1230 | else { | |
1231 | pr ("\nPattern not found\n"); | |
1232 | end_it (); | |
1233 | } | |
1234 | error ("Pattern not found"); | |
1235 | } | |
1236 | } | |
1237 | ||
1238 | execute (filename, cmd, args) | |
1239 | char *filename; | |
1240 | char *cmd, *args; | |
1241 | { | |
1242 | int id; | |
1243 | ||
1244 | fflush (stdout); | |
1245 | reset_tty (); | |
1246 | while ((id = fork ()) < 0) | |
1247 | sleep (5); | |
1248 | if (id == 0) { | |
1249 | execv (cmd, &args); | |
1250 | write (2, "exec failed\n", 12); | |
1251 | exit (1); | |
1252 | } | |
1253 | signal (SIGINT, SIG_IGN); | |
1254 | signal (SIGQUIT, SIG_IGN); | |
ffa58356 ES |
1255 | if (catch_susp) |
1256 | signal(SIGTSTP, SIG_DFL); | |
ffa58356 ES |
1257 | wait (0); |
1258 | signal (SIGINT, end_it); | |
1259 | signal (SIGQUIT, onquit); | |
ffa58356 ES |
1260 | if (catch_susp) |
1261 | signal(SIGTSTP, onsusp); | |
ffa58356 ES |
1262 | set_tty (); |
1263 | pr ("------------------------\n"); | |
1264 | prompt (filename); | |
1265 | } | |
1266 | /* | |
1267 | ** Skip n lines in the file f | |
1268 | */ | |
1269 | ||
1270 | skiplns (n, f) | |
1271 | register int n; | |
1272 | register FILE *f; | |
1273 | { | |
1274 | register char c; | |
1275 | ||
1276 | while (n > 0) { | |
1277 | while ((c = Getc (f)) != '\n') | |
1278 | if (c == EOF) | |
1279 | return; | |
1280 | n--; | |
1281 | Currline++; | |
1282 | } | |
1283 | } | |
1284 | ||
1285 | /* | |
1286 | ** Skip nskip files in the file list (from the command line). Nskip may be | |
1287 | ** negative. | |
1288 | */ | |
1289 | ||
1290 | skipf (nskip) | |
1291 | register int nskip; | |
1292 | { | |
1293 | if (nskip == 0) return; | |
1294 | if (nskip > 0) { | |
1295 | if (fnum + nskip > nfiles - 1) | |
1296 | nskip = nfiles - fnum - 1; | |
1297 | } | |
1298 | else if (within) | |
1299 | ++fnum; | |
1300 | fnum += nskip; | |
1301 | if (fnum < 0) | |
1302 | fnum = 0; | |
35bd36fc | 1303 | pr ("\n...Skipping "); |
38ccf597 | 1304 | pr ("\n"); |
35bd36fc BJ |
1305 | if (clreol) |
1306 | cleareol (); | |
38ccf597 | 1307 | pr ("...Skipping "); |
ffa58356 ES |
1308 | pr (nskip > 0 ? "to file " : "back to file "); |
1309 | pr (fnames[fnum]); | |
38ccf597 | 1310 | pr ("\n"); |
35bd36fc BJ |
1311 | if (clreol) |
1312 | cleareol (); | |
38ccf597 | 1313 | pr ("\n"); |
ffa58356 ES |
1314 | --fnum; |
1315 | } | |
1316 | ||
1317 | /*----------------------------- Terminal I/O -------------------------------*/ | |
1318 | ||
1319 | initterm () | |
1320 | { | |
1321 | char buf[TBUFSIZ]; | |
1322 | char clearbuf[100]; | |
1323 | char *clearptr, *padstr; | |
ffa58356 | 1324 | int ldisc; |
54decef9 | 1325 | char *term; |
ffa58356 ES |
1326 | |
1327 | setbuf(stdout, obuf); | |
1328 | if (!(no_tty = gtty(1, &otty))) { | |
4ff0975e | 1329 | if ((term = getenv("TERM")) && tgetent(buf, term) <= 0) { |
35bd36fc | 1330 | dumb++; ul_opt = 0; |
ffa58356 ES |
1331 | } |
1332 | else { | |
1333 | if (((Lpp = tgetnum("li")) < 0) || tgetflag("hc")) { | |
1334 | hard++; /* Hard copy terminal */ | |
1335 | Lpp = 24; | |
1336 | } | |
1337 | if (tailequ (fnames[0], "page") || !hard && tgetflag("ns")) | |
1338 | noscroll++; | |
1339 | if ((Mcol = tgetnum("co")) < 0) | |
1340 | Mcol = 80; | |
1341 | Wrap = tgetflag("am"); | |
1342 | bad_so = tgetflag ("xs"); | |
1343 | clearptr = clearbuf; | |
1344 | eraseln = tgetstr("ce",&clearptr); | |
1345 | Clear = tgetstr("cl", &clearptr); | |
1346 | Senter = tgetstr("so", &clearptr); | |
1347 | Sexit = tgetstr("se", &clearptr); | |
35bd36fc BJ |
1348 | |
1349 | /* | |
1350 | * Set up for underlining: some terminals don't need it; | |
1351 | * others have start/stop sequences, still others have an | |
1352 | * underline char sequence which is assumed to move the | |
1353 | * cursor forward one character. If underline sequence | |
1354 | * isn't available, settle for standout sequence. | |
1355 | */ | |
1356 | ||
1357 | if (tgetflag("ul") || tgetflag("os")) | |
1358 | ul_opt = 0; | |
1359 | if ((chUL = tgetstr("uc", &clearptr)) == NULL ) | |
1360 | chUL = ""; | |
1361 | if ((ULenter = tgetstr("us", &clearptr)) == NULL && | |
1362 | (!*chUL) && (ULenter = tgetstr("so", &clearptr)) == NULL) | |
1363 | ULenter = ""; | |
1364 | if ((ULexit = tgetstr("ue", &clearptr)) == NULL && | |
1365 | (!*chUL) && (ULexit = tgetstr("se", &clearptr)) == NULL) | |
1366 | ULexit = ""; | |
1367 | ||
ffa58356 ES |
1368 | if (padstr = tgetstr("pc", &clearptr)) |
1369 | PC = *padstr; | |
38ccf597 | 1370 | Home = tgetstr("ho",&clearptr); |
4ff0975e | 1371 | if (Home == 0 && *Home == '\0') |
38ccf597 | 1372 | { |
35bd36fc BJ |
1373 | if ((cursorm = tgetstr("cm", &clearptr)) != NULL) { |
1374 | strcpy(cursorhome, tgoto(cursorm, 0, 0)); | |
38ccf597 BJ |
1375 | Home = cursorhome; |
1376 | } | |
1377 | } | |
35bd36fc | 1378 | EodClr = tgetstr("cd", &clearptr); |
ffa58356 ES |
1379 | } |
1380 | if ((shell = getenv("SHELL")) == NULL) | |
1381 | shell = "/bin/sh"; | |
1382 | } | |
1383 | no_intty = gtty(0, &otty); | |
1384 | gtty(2, &otty); | |
1385 | ospeed = otty.sg_ospeed; | |
1386 | slow_tty = ospeed < B1200; | |
1387 | hardtabs = !(otty.sg_flags & XTABS); | |
1388 | if (!no_tty) { | |
1389 | otty.sg_flags &= ~ECHO; | |
1390 | if (MBIT == CBREAK || !slow_tty) | |
1391 | otty.sg_flags |= MBIT; | |
1392 | } | |
1393 | } | |
1394 | ||
1395 | readch () | |
1396 | { | |
1397 | char ch; | |
1398 | extern int errno; | |
1399 | ||
1400 | if (read (2, &ch, 1) <= 0) | |
1401 | if (errno != EINTR) | |
1402 | exit(0); | |
1403 | else | |
1404 | ch = otty.sg_kill; | |
1405 | return (ch); | |
1406 | } | |
1407 | ||
1408 | static char BS = '\b'; | |
1409 | static char CARAT = '^'; | |
1410 | ||
1411 | ttyin (buf, nmax, pchar) | |
1412 | char buf[]; | |
1413 | register int nmax; | |
1414 | char pchar; | |
1415 | { | |
1416 | register char *sptr; | |
1417 | register char ch; | |
1418 | register int slash = 0; | |
1419 | int maxlen; | |
1420 | char cbuf; | |
1421 | ||
1422 | sptr = buf; | |
1423 | maxlen = 0; | |
1424 | while (sptr - buf < nmax) { | |
1425 | if (promptlen > maxlen) maxlen = promptlen; | |
1426 | ch = readch (); | |
1427 | if (ch == '\\') { | |
1428 | slash++; | |
1429 | } | |
1430 | else if ((ch == otty.sg_erase) && !slash) { | |
1431 | if (sptr > buf) { | |
1432 | --promptlen; | |
1433 | write (2, &BS, 1); | |
1434 | --sptr; | |
1435 | if ((*sptr < ' ' && *sptr != '\n') || *sptr == RUBOUT) { | |
1436 | --promptlen; | |
1437 | write (2, &BS, 1); | |
1438 | } | |
1439 | continue; | |
1440 | } | |
1441 | else { | |
1442 | if (!eraseln) promptlen = maxlen; | |
1443 | longjmp (restore, 1); | |
1444 | } | |
1445 | } | |
1446 | else if ((ch == otty.sg_kill) && !slash) { | |
1447 | if (hard) { | |
1448 | show (ch); | |
1449 | putchar ('\n'); | |
1450 | putchar (pchar); | |
1451 | } | |
1452 | else { | |
1453 | putchar ('\r'); | |
1454 | putchar (pchar); | |
1455 | if (eraseln) | |
1456 | erase (1); | |
1457 | promptlen = 1; | |
1458 | } | |
1459 | sptr = buf; | |
1460 | fflush (stdout); | |
1461 | continue; | |
1462 | } | |
1463 | if (slash && (ch == otty.sg_kill || ch == otty.sg_erase)) { | |
1464 | write (2, &BS, 1); | |
1465 | --sptr; | |
1466 | } | |
1467 | if (ch != '\\') | |
1468 | slash = 0; | |
1469 | *sptr++ = ch; | |
1470 | if ((ch < ' ' && ch != '\n' && ch != ESC) || ch == RUBOUT) { | |
1471 | ch += ch == RUBOUT ? -0100 : 0100; | |
1472 | write (2, &CARAT, 1); | |
1473 | promptlen++; | |
1474 | } | |
1475 | cbuf = ch; | |
1476 | if (ch != '\n' && ch != ESC) { | |
1477 | write (2, &cbuf, 1); | |
1478 | promptlen++; | |
1479 | } | |
1480 | else | |
1481 | break; | |
1482 | } | |
1483 | *--sptr = '\0'; | |
1484 | if (!eraseln) promptlen = maxlen; | |
1485 | if (sptr - buf >= nmax - 1) | |
1486 | error ("Line too long"); | |
1487 | } | |
1488 | ||
1489 | expand (outbuf, inbuf) | |
1490 | char *outbuf; | |
1491 | char *inbuf; | |
1492 | { | |
1493 | register char *instr; | |
1494 | register char *outstr; | |
1495 | register char ch; | |
1496 | char temp[200]; | |
1497 | int changed = 0; | |
1498 | ||
1499 | instr = inbuf; | |
1500 | outstr = temp; | |
1501 | while ((ch = *instr++) != '\0') | |
1502 | switch (ch) { | |
1503 | case '%': | |
1504 | if (!no_intty) { | |
1505 | strcpy (outstr, fnames[fnum]); | |
1506 | outstr += strlen (fnames[fnum]); | |
1507 | changed++; | |
1508 | } | |
1509 | else | |
1510 | *outstr++ = ch; | |
1511 | break; | |
1512 | case '!': | |
1513 | if (!shellp) | |
1514 | error ("No previous command to substitute for"); | |
1515 | strcpy (outstr, shell_line); | |
1516 | outstr += strlen (shell_line); | |
1517 | changed++; | |
1518 | break; | |
1519 | case '\\': | |
1520 | if (*instr == '%' || *instr == '!') { | |
1521 | *outstr++ = *instr++; | |
1522 | break; | |
1523 | } | |
1524 | default: | |
1525 | *outstr++ = ch; | |
1526 | } | |
1527 | *outstr++ = '\0'; | |
1528 | strcpy (outbuf, temp); | |
1529 | return (changed); | |
1530 | } | |
1531 | ||
1532 | show (ch) | |
1533 | register char ch; | |
1534 | { | |
1535 | char cbuf; | |
1536 | ||
1537 | if ((ch < ' ' && ch != '\n' && ch != ESC) || ch == RUBOUT) { | |
1538 | ch += ch == RUBOUT ? -0100 : 0100; | |
1539 | write (2, &CARAT, 1); | |
1540 | promptlen++; | |
1541 | } | |
1542 | cbuf = ch; | |
1543 | write (2, &cbuf, 1); | |
1544 | promptlen++; | |
1545 | } | |
1546 | ||
1547 | error (mess) | |
1548 | char *mess; | |
1549 | { | |
35bd36fc BJ |
1550 | if (clreol) |
1551 | cleareol (); | |
1552 | else | |
1553 | kill_line (); | |
ffa58356 ES |
1554 | promptlen += strlen (mess); |
1555 | if (Senter && Sexit) { | |
1556 | tputs (Senter, 1, putch); | |
1557 | pr(mess); | |
1558 | tputs (Sexit, 1, putch); | |
1559 | } | |
1560 | else | |
1561 | pr (mess); | |
1562 | fflush(stdout); | |
1563 | errors++; | |
1564 | longjmp (restore, 1); | |
1565 | } | |
1566 | ||
1567 | ||
1568 | set_tty () | |
1569 | { | |
1570 | otty.sg_flags |= MBIT; | |
1571 | otty.sg_flags &= ~ECHO; | |
1572 | stty(2, &otty); | |
1573 | } | |
1574 | ||
1575 | reset_tty () | |
1576 | { | |
1577 | otty.sg_flags |= ECHO; | |
1578 | otty.sg_flags &= ~MBIT; | |
1579 | stty(2, &otty); | |
1580 | } | |
1581 | ||
1582 | rdline (f) | |
1583 | register FILE *f; | |
1584 | { | |
1585 | register char c; | |
1586 | register char *p; | |
1587 | ||
1588 | p = Line; | |
1589 | while ((c = Getc (f)) != '\n' && c != EOF && p - Line < LINSIZ - 1) | |
1590 | *p++ = c; | |
1591 | if (c == '\n') | |
1592 | Currline++; | |
1593 | *p = '\0'; | |
1594 | } | |
1595 | ||
1596 | /* Come here when we get a suspend signal from the terminal */ | |
1597 | ||
ffa58356 ES |
1598 | onsusp () |
1599 | { | |
1600 | reset_tty (); | |
1601 | fflush (stdout); | |
1602 | /* Send the TSTP signal to suspend our process group */ | |
1603 | kill (0, SIGTSTP); | |
1604 | /* Pause for station break */ | |
1605 | ||
1606 | /* We're back */ | |
1607 | signal (SIGTSTP, onsusp); | |
1608 | set_tty (); | |
1609 | if (inwait) | |
1610 | longjmp (restore); | |
1611 | } |