Commit | Line | Data |
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8b7ec80f | 1 | #ifndef lint |
807f035a | 2 | static char *sccsid = "@(#)more.c 4.18 (Berkeley) 84/05/24"; |
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 | ||
8828eef4 | 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 */ | |
85 | long fseek(); | |
38ccf597 | 86 | char *getenv(); |
ffa58356 ES |
87 | struct { |
88 | long chrctr, line; | |
89 | } context, screen_start; | |
90 | extern char PC; /* pad character */ | |
91 | extern short ospeed; | |
92 | ||
93 | ||
94 | main(argc, argv) | |
95 | int argc; | |
96 | char *argv[]; | |
97 | { | |
98 | register FILE *f; | |
99 | register char *s; | |
100 | register char *p; | |
101 | register char ch; | |
102 | register int left; | |
103 | int prnames = 0; | |
104 | int initopt = 0; | |
105 | int srchopt = 0; | |
106 | int clearit = 0; | |
107 | int initline; | |
108 | char initbuf[80]; | |
109 | FILE *checkf(); | |
110 | ||
111 | nfiles = argc; | |
112 | fnames = argv; | |
113 | initterm (); | |
88cdaae7 RC |
114 | nscroll = Lpp/2 - 1; |
115 | if (nscroll <= 0) | |
116 | nscroll = 1; | |
38ccf597 | 117 | if(s = getenv("MORE")) argscan(s); |
ffa58356 ES |
118 | while (--nfiles > 0) { |
119 | if ((ch = (*++fnames)[0]) == '-') { | |
38ccf597 | 120 | argscan(*fnames+1); |
ffa58356 ES |
121 | } |
122 | else if (ch == '+') { | |
123 | s = *fnames; | |
124 | if (*++s == '/') { | |
125 | srchopt++; | |
126 | for (++s, p = initbuf; p < initbuf + 79 && *s != '\0';) | |
127 | *p++ = *s++; | |
128 | *p = '\0'; | |
129 | } | |
130 | else { | |
131 | initopt++; | |
132 | for (initline = 0; *s != '\0'; s++) | |
133 | if (isdigit (*s)) | |
134 | initline = initline*10 + *s -'0'; | |
135 | --initline; | |
136 | } | |
137 | } | |
138 | else break; | |
139 | } | |
35bd36fc | 140 | /* allow clreol only if Home and eraseln and EodClr strings are |
38ccf597 BJ |
141 | * defined, and in that case, make sure we are in noscroll mode |
142 | */ | |
143 | if(clreol) | |
144 | { | |
35bd36fc BJ |
145 | if ((*Home == '\0') || (*eraseln == '\0') || (*EodClr == '\0')) |
146 | clreol = 0; | |
38ccf597 BJ |
147 | else noscroll = 1; |
148 | } | |
149 | ||
ffa58356 ES |
150 | if (dlines == 0) |
151 | dlines = Lpp - (noscroll ? 1 : 2); | |
152 | left = dlines; | |
153 | if (nfiles > 1) | |
154 | prnames++; | |
155 | if (!no_intty && nfiles == 0) { | |
156 | fputs("Usage: ",stderr); | |
157 | fputs(argv[0],stderr); | |
158 | fputs(" [-dfln] [+linenum | +/pattern] name1 name2 ...\n",stderr); | |
159 | exit(1); | |
160 | } | |
161 | else | |
162 | f = stdin; | |
163 | if (!no_tty) { | |
164 | signal(SIGQUIT, onquit); | |
165 | signal(SIGINT, end_it); | |
ffa58356 ES |
166 | if (signal (SIGTSTP, SIG_IGN) == SIG_DFL) { |
167 | signal(SIGTSTP, onsusp); | |
168 | catch_susp++; | |
169 | } | |
ffa58356 ES |
170 | stty (2, &otty); |
171 | } | |
172 | if (no_intty) { | |
173 | if (no_tty) | |
174 | copy_file (stdin); | |
175 | else { | |
176 | if ((ch = Getc (f)) == '\f') | |
35bd36fc | 177 | doclear(); |
ffa58356 ES |
178 | else { |
179 | Ungetc (ch, f); | |
35bd36fc BJ |
180 | if (noscroll && (ch != EOF)) { |
181 | if (clreol) | |
182 | home (); | |
183 | else | |
184 | doclear (); | |
38ccf597 | 185 | } |
ffa58356 ES |
186 | } |
187 | if (srchopt) | |
38ccf597 | 188 | { |
ffa58356 | 189 | search (initbuf, stdin, 1); |
35bd36fc BJ |
190 | if (noscroll) |
191 | left--; | |
38ccf597 | 192 | } |
ffa58356 ES |
193 | else if (initopt) |
194 | skiplns (initline, stdin); | |
195 | screen (stdin, left); | |
196 | } | |
197 | no_intty = 0; | |
198 | prnames++; | |
199 | firstf = 0; | |
200 | } | |
201 | ||
202 | while (fnum < nfiles) { | |
203 | if ((f = checkf (fnames[fnum], &clearit)) != NULL) { | |
204 | context.line = context.chrctr = 0; | |
205 | Currline = 0; | |
206 | if (firstf) setjmp (restore); | |
207 | if (firstf) { | |
208 | firstf = 0; | |
209 | if (srchopt) | |
38ccf597 | 210 | { |
ffa58356 | 211 | search (initbuf, f, 1); |
35bd36fc BJ |
212 | if (noscroll) |
213 | left--; | |
38ccf597 | 214 | } |
ffa58356 ES |
215 | else if (initopt) |
216 | skiplns (initline, f); | |
217 | } | |
218 | else if (fnum < nfiles && !no_tty) { | |
219 | setjmp (restore); | |
220 | left = command (fnames[fnum], f); | |
221 | } | |
222 | if (left != 0) { | |
35bd36fc BJ |
223 | if ((noscroll || clearit) && (file_size != 0x7fffffffffffffffL)) |
224 | if (clreol) | |
225 | home (); | |
226 | else | |
227 | doclear (); | |
ffa58356 ES |
228 | if (prnames) { |
229 | if (bad_so) | |
230 | erase (0); | |
35bd36fc BJ |
231 | if (clreol) |
232 | cleareol (); | |
ffa58356 ES |
233 | pr("::::::::::::::"); |
234 | if (promptlen > 14) | |
235 | erase (14); | |
38ccf597 BJ |
236 | printf ("\n"); |
237 | if(clreol) cleareol(); | |
238 | printf("%s\n", fnames[fnum]); | |
239 | if(clreol) cleareol(); | |
240 | printf("::::::::::::::\n", fnames[fnum]); | |
ffa58356 ES |
241 | if (left > Lpp - 4) |
242 | left = Lpp - 4; | |
243 | } | |
244 | if (no_tty) | |
245 | copy_file (f); | |
246 | else { | |
247 | within++; | |
248 | screen(f, left); | |
249 | within = 0; | |
250 | } | |
251 | } | |
252 | setjmp (restore); | |
253 | fflush(stdout); | |
254 | fclose(f); | |
255 | screen_start.line = screen_start.chrctr = 0L; | |
256 | context.line = context.chrctr = 0L; | |
257 | } | |
258 | fnum++; | |
259 | firstf = 0; | |
260 | } | |
261 | reset_tty (); | |
262 | exit(0); | |
263 | } | |
264 | ||
38ccf597 BJ |
265 | argscan(s) |
266 | char *s; | |
267 | { | |
718f6e88 KL |
268 | for (dlines = 0; *s != '\0'; s++) |
269 | { | |
270 | switch (*s) | |
271 | { | |
272 | case '0': case '1': case '2': | |
273 | case '3': case '4': case '5': | |
274 | case '6': case '7': case '8': | |
275 | case '9': | |
276 | dlines = dlines*10 + *s - '0'; | |
277 | break; | |
278 | case 'd': | |
279 | dum_opt = 1; | |
280 | break; | |
281 | case 'l': | |
282 | stop_opt = 0; | |
283 | break; | |
284 | case 'f': | |
285 | fold_opt = 0; | |
286 | break; | |
287 | case 'p': | |
288 | noscroll++; | |
289 | break; | |
290 | case 'c': | |
291 | clreol++; | |
292 | break; | |
293 | case 's': | |
294 | ssp_opt = 1; | |
295 | break; | |
296 | case 'u': | |
297 | ul_opt = 0; | |
298 | break; | |
299 | } | |
300 | } | |
38ccf597 BJ |
301 | } |
302 | ||
303 | ||
ffa58356 ES |
304 | /* |
305 | ** Check whether the file named by fs is an ASCII file which the user may | |
306 | ** access. If it is, return the opened file. Otherwise return NULL. | |
307 | */ | |
308 | ||
309 | FILE * | |
310 | checkf (fs, clearfirst) | |
311 | register char *fs; | |
312 | int *clearfirst; | |
313 | { | |
314 | struct stat stbuf; | |
315 | register FILE *f; | |
316 | char c; | |
317 | ||
318 | if (stat (fs, &stbuf) == -1) { | |
319 | fflush(stdout); | |
35bd36fc BJ |
320 | if (clreol) |
321 | cleareol (); | |
ffa58356 ES |
322 | perror(fs); |
323 | return (NULL); | |
324 | } | |
325 | if ((stbuf.st_mode & S_IFMT) == S_IFDIR) { | |
326 | printf("\n*** %s: directory ***\n\n", fs); | |
327 | return (NULL); | |
328 | } | |
329 | if ((f=Fopen(fs, "r")) == NULL) { | |
330 | fflush(stdout); | |
331 | perror(fs); | |
332 | return (NULL); | |
333 | } | |
334 | c = Getc(f); | |
335 | ||
336 | /* Try to see whether it is an ASCII file */ | |
337 | ||
338 | switch ((c | *f->_ptr << 8) & 0177777) { | |
339 | case 0405: | |
340 | case 0407: | |
341 | case 0410: | |
342 | case 0411: | |
343 | case 0413: | |
344 | case 0177545: | |
345 | printf("\n******** %s: Not a text file ********\n\n", fs); | |
346 | fclose (f); | |
347 | return (NULL); | |
348 | default: | |
349 | break; | |
350 | } | |
351 | if (c == '\f') | |
352 | *clearfirst = 1; | |
353 | else { | |
354 | *clearfirst = 0; | |
355 | Ungetc (c, f); | |
356 | } | |
357 | if ((file_size = stbuf.st_size) == 0) | |
358 | file_size = 0x7fffffffffffffffL; | |
359 | return (f); | |
360 | } | |
361 | ||
362 | /* | |
363 | ** A real function, for the tputs routine in termlib | |
364 | */ | |
365 | ||
366 | putch (ch) | |
367 | char ch; | |
368 | { | |
369 | putchar (ch); | |
370 | } | |
371 | ||
372 | /* | |
373 | ** Print out the contents of the file f, one screenful at a time. | |
374 | */ | |
375 | ||
376 | #define STOP -10 | |
377 | ||
378 | screen (f, num_lines) | |
379 | register FILE *f; | |
380 | register int num_lines; | |
381 | { | |
382 | register int c; | |
383 | register int nchars; | |
35bd36fc BJ |
384 | int length; /* length of current line */ |
385 | static int prev_len = 1; /* length of previous line */ | |
ffa58356 ES |
386 | |
387 | for (;;) { | |
388 | while (num_lines > 0 && !Pause) { | |
389 | if ((nchars = getline (f, &length)) == EOF) | |
38ccf597 | 390 | { |
35bd36fc BJ |
391 | if (clreol) |
392 | clreos(); | |
ffa58356 | 393 | return; |
38ccf597 | 394 | } |
35bd36fc BJ |
395 | if (ssp_opt && length == 0 && prev_len == 0) |
396 | continue; | |
397 | prev_len = length; | |
ffa58356 ES |
398 | if (bad_so || (Senter && *Senter == ' ') && promptlen > 0) |
399 | erase (0); | |
35bd36fc BJ |
400 | /* must clear before drawing line since tabs on some terminals |
401 | * do not erase what they tab over. | |
402 | */ | |
403 | if (clreol) | |
404 | cleareol (); | |
ffa58356 ES |
405 | prbuf (Line, length); |
406 | if (nchars < promptlen) | |
407 | erase (nchars); /* erase () sets promptlen to 0 */ | |
408 | else promptlen = 0; | |
35bd36fc BJ |
409 | /* is this needed? |
410 | * if (clreol) | |
411 | * cleareol(); /* must clear again in case we wrapped * | |
412 | */ | |
ffa58356 ES |
413 | if (nchars < Mcol || !fold_opt) |
414 | putchar('\n'); | |
415 | if (nchars == STOP) | |
416 | break; | |
417 | num_lines--; | |
418 | } | |
419 | fflush(stdout); | |
420 | if ((c = Getc(f)) == EOF) | |
38ccf597 | 421 | { |
35bd36fc BJ |
422 | if (clreol) |
423 | clreos (); | |
ffa58356 | 424 | return; |
38ccf597 BJ |
425 | } |
426 | ||
35bd36fc BJ |
427 | if (Pause && clreol) |
428 | clreos (); | |
ffa58356 ES |
429 | Ungetc (c, f); |
430 | setjmp (restore); | |
431 | Pause = 0; startup = 0; | |
432 | if ((num_lines = command (NULL, f)) == 0) | |
433 | return; | |
434 | if (hard && promptlen > 0) | |
435 | erase (0); | |
a97c843b | 436 | if (noscroll && num_lines >= dlines) |
38ccf597 | 437 | { |
35bd36fc BJ |
438 | if (clreol) |
439 | home(); | |
440 | else | |
441 | doclear (); | |
38ccf597 | 442 | } |
ffa58356 ES |
443 | screen_start.line = Currline; |
444 | screen_start.chrctr = Ftell (f); | |
445 | } | |
446 | } | |
447 | ||
448 | /* | |
449 | ** Come here if a quit signal is received | |
450 | */ | |
451 | ||
452 | onquit() | |
453 | { | |
454 | signal(SIGQUIT, SIG_IGN); | |
455 | if (!inwait) { | |
456 | putchar ('\n'); | |
457 | if (!startup) { | |
458 | signal(SIGQUIT, onquit); | |
459 | longjmp (restore, 1); | |
460 | } | |
461 | else | |
462 | Pause++; | |
463 | } | |
464 | else if (!dum_opt && notell) { | |
465 | write (2, "[Use q or Q to quit]", 20); | |
466 | promptlen += 20; | |
467 | notell = 0; | |
468 | } | |
469 | signal(SIGQUIT, onquit); | |
470 | } | |
471 | ||
472 | /* | |
473 | ** Clean up terminal state and exit. Also come here if interrupt signal received | |
474 | */ | |
475 | ||
476 | end_it () | |
477 | { | |
478 | ||
479 | reset_tty (); | |
35bd36fc BJ |
480 | if (clreol) { |
481 | putchar ('\r'); | |
482 | clreos (); | |
483 | fflush (stdout); | |
484 | } | |
38ccf597 | 485 | else if (!clreol && (promptlen > 0)) { |
ffa58356 ES |
486 | kill_line (); |
487 | fflush (stdout); | |
488 | } | |
489 | else | |
490 | write (2, "\n", 1); | |
491 | _exit(0); | |
492 | } | |
493 | ||
494 | copy_file(f) | |
495 | register FILE *f; | |
496 | { | |
497 | register int c; | |
498 | ||
499 | while ((c = getc(f)) != EOF) | |
500 | putchar(c); | |
501 | } | |
502 | ||
503 | /* Simplified printf function */ | |
504 | ||
505 | printf (fmt, args) | |
506 | register char *fmt; | |
507 | int args; | |
508 | { | |
509 | register int *argp; | |
510 | register char ch; | |
511 | register int ccount; | |
512 | ||
513 | ccount = 0; | |
514 | argp = &args; | |
515 | while (*fmt) { | |
516 | while ((ch = *fmt++) != '%') { | |
517 | if (ch == '\0') | |
518 | return (ccount); | |
519 | ccount++; | |
520 | putchar (ch); | |
521 | } | |
522 | switch (*fmt++) { | |
523 | case 'd': | |
524 | ccount += printd (*argp); | |
525 | break; | |
526 | case 's': | |
527 | ccount += pr ((char *)*argp); | |
528 | break; | |
529 | case '%': | |
530 | ccount++; | |
531 | argp--; | |
532 | putchar ('%'); | |
533 | break; | |
534 | case '0': | |
535 | return (ccount); | |
536 | default: | |
537 | break; | |
538 | } | |
539 | ++argp; | |
540 | } | |
541 | return (ccount); | |
542 | ||
543 | } | |
544 | ||
545 | /* | |
546 | ** Print an integer as a string of decimal digits, | |
547 | ** returning the length of the print representation. | |
548 | */ | |
549 | ||
550 | printd (n) | |
551 | int n; | |
552 | { | |
553 | int a, nchars; | |
554 | ||
555 | if (a = n/10) | |
556 | nchars = 1 + printd(a); | |
557 | else | |
558 | nchars = 1; | |
559 | putchar (n % 10 + '0'); | |
560 | return (nchars); | |
561 | } | |
562 | ||
563 | /* Put the print representation of an integer into a string */ | |
564 | static char *sptr; | |
565 | ||
566 | scanstr (n, str) | |
567 | int n; | |
568 | char *str; | |
569 | { | |
570 | sptr = str; | |
718f6e88 | 571 | Sprintf (n); |
ffa58356 ES |
572 | *sptr = '\0'; |
573 | } | |
574 | ||
718f6e88 | 575 | Sprintf (n) |
ffa58356 ES |
576 | { |
577 | int a; | |
578 | ||
579 | if (a = n/10) | |
718f6e88 | 580 | Sprintf (a); |
ffa58356 ES |
581 | *sptr++ = n % 10 + '0'; |
582 | } | |
583 | ||
584 | static char bell = ctrl(G); | |
585 | ||
586 | strlen (s) | |
587 | char *s; | |
588 | { | |
589 | register char *p; | |
590 | ||
591 | p = s; | |
592 | while (*p++) | |
593 | ; | |
594 | return (p - s - 1); | |
595 | } | |
596 | ||
597 | /* See whether the last component of the path name "path" is equal to the | |
598 | ** string "string" | |
599 | */ | |
600 | ||
601 | tailequ (path, string) | |
602 | char *path; | |
603 | register char *string; | |
604 | { | |
605 | register char *tail; | |
606 | ||
607 | tail = path + strlen(path); | |
608 | while (tail >= path) | |
609 | if (*(--tail) == '/') | |
610 | break; | |
611 | ++tail; | |
612 | while (*tail++ == *string++) | |
613 | if (*tail == '\0') | |
614 | return(1); | |
615 | return(0); | |
616 | } | |
617 | ||
618 | prompt (filename) | |
619 | char *filename; | |
620 | { | |
35bd36fc BJ |
621 | if (clreol) |
622 | cleareol (); | |
38ccf597 | 623 | else if (promptlen > 0) |
ffa58356 ES |
624 | kill_line (); |
625 | if (!hard) { | |
626 | promptlen = 8; | |
627 | if (Senter && Sexit) | |
628 | tputs (Senter, 1, putch); | |
35bd36fc BJ |
629 | if (clreol) |
630 | cleareol (); | |
ffa58356 ES |
631 | pr("--More--"); |
632 | if (filename != NULL) { | |
633 | promptlen += printf ("(Next file: %s)", filename); | |
634 | } | |
635 | else if (!no_intty) { | |
636 | promptlen += printf ("(%d%%)", (int)((file_pos * 100) / file_size)); | |
637 | } | |
638 | if (dum_opt) { | |
639 | promptlen += pr("[Hit space to continue, Rubout to abort]"); | |
640 | } | |
641 | if (Senter && Sexit) | |
642 | tputs (Sexit, 1, putch); | |
35bd36fc BJ |
643 | if (clreol) |
644 | clreos (); | |
ffa58356 ES |
645 | fflush(stdout); |
646 | } | |
647 | else | |
648 | write (2, &bell, 1); | |
649 | inwait++; | |
650 | } | |
651 | ||
652 | /* | |
653 | ** Get a logical line | |
654 | */ | |
655 | ||
656 | getline(f, length) | |
657 | register FILE *f; | |
658 | int *length; | |
659 | { | |
660 | register int c; | |
661 | register char *p; | |
662 | register int column; | |
663 | static int colflg; | |
664 | ||
665 | p = Line; | |
666 | column = 0; | |
667 | c = Getc (f); | |
668 | if (colflg && c == '\n') { | |
669 | Currline++; | |
670 | c = Getc (f); | |
671 | } | |
672 | while (p < &Line[LINSIZ - 1]) { | |
673 | if (c == EOF) { | |
674 | if (p > Line) { | |
675 | *p = '\0'; | |
676 | *length = p - Line; | |
677 | return (column); | |
678 | } | |
679 | *length = p - Line; | |
680 | return (EOF); | |
681 | } | |
682 | if (c == '\n') { | |
683 | Currline++; | |
684 | break; | |
685 | } | |
686 | *p++ = c; | |
687 | if (c == '\t') | |
688 | if (hardtabs && column < promptlen && !hard) { | |
689 | if (eraseln && !dumb) { | |
690 | column = 1 + (column | 7); | |
691 | tputs (eraseln, 1, putch); | |
692 | promptlen = 0; | |
693 | } | |
694 | else { | |
695 | for (--p; column & 7 && p < &Line[LINSIZ - 1]; column++) { | |
696 | *p++ = ' '; | |
697 | } | |
698 | if (column >= promptlen) promptlen = 0; | |
699 | } | |
700 | } | |
701 | else | |
702 | column = 1 + (column | 7); | |
d1b174c2 | 703 | else if (c == '\b' && column > 0) |
ffa58356 ES |
704 | column--; |
705 | else if (c == '\r') | |
706 | column = 0; | |
707 | else if (c == '\f' && stop_opt) { | |
708 | p[-1] = '^'; | |
709 | *p++ = 'L'; | |
710 | column += 2; | |
711 | Pause++; | |
712 | } | |
713 | else if (c == EOF) { | |
714 | *length = p - Line; | |
715 | return (column); | |
716 | } | |
717 | else if (c >= ' ' && c != RUBOUT) | |
718 | column++; | |
719 | if (column >= Mcol && fold_opt) break; | |
720 | c = Getc (f); | |
721 | } | |
722 | if (column >= Mcol && Mcol > 0) { | |
723 | if (!Wrap) { | |
724 | *p++ = '\n'; | |
725 | } | |
726 | } | |
727 | colflg = column == Mcol && fold_opt; | |
728 | *length = p - Line; | |
729 | *p = 0; | |
730 | return (column); | |
731 | } | |
732 | ||
733 | /* | |
734 | ** Erase the rest of the prompt, assuming we are starting at column col. | |
735 | */ | |
736 | ||
737 | erase (col) | |
738 | register int col; | |
739 | { | |
740 | ||
741 | if (promptlen == 0) | |
742 | return; | |
743 | if (hard) { | |
744 | putchar ('\n'); | |
745 | } | |
746 | else { | |
747 | if (col == 0) | |
748 | putchar ('\r'); | |
749 | if (!dumb && eraseln) | |
750 | tputs (eraseln, 1, putch); | |
751 | else | |
752 | for (col = promptlen - col; col > 0; col--) | |
753 | putchar (' '); | |
754 | } | |
755 | promptlen = 0; | |
756 | } | |
757 | ||
758 | /* | |
759 | ** Erase the current line entirely | |
760 | */ | |
761 | ||
762 | kill_line () | |
763 | { | |
764 | erase (0); | |
765 | if (!eraseln || dumb) putchar ('\r'); | |
766 | } | |
767 | ||
38ccf597 BJ |
768 | /* |
769 | * force clear to end of line | |
770 | */ | |
771 | cleareol() | |
772 | { | |
35bd36fc | 773 | tputs(eraseln, 1, putch); |
38ccf597 BJ |
774 | } |
775 | ||
35bd36fc | 776 | clreos() |
38ccf597 | 777 | { |
35bd36fc | 778 | tputs(EodClr, 1, putch); |
38ccf597 BJ |
779 | } |
780 | ||
ffa58356 ES |
781 | /* |
782 | ** Print string and return number of characters | |
783 | */ | |
784 | ||
785 | pr(s1) | |
786 | char *s1; | |
787 | { | |
788 | register char *s; | |
789 | register char c; | |
790 | ||
791 | for (s = s1; c = *s++; ) | |
792 | putchar(c); | |
793 | return (s - s1 - 1); | |
794 | } | |
795 | ||
796 | ||
797 | /* Print a buffer of n characters */ | |
798 | ||
799 | prbuf (s, n) | |
800 | register char *s; | |
801 | register int n; | |
802 | { | |
35bd36fc BJ |
803 | char c; /* next ouput character */ |
804 | register int state; /* next output char's UL state */ | |
805 | static int pstate = 0; /* current terminal UL state (off) */ | |
806 | ||
807 | while (--n >= 0) | |
808 | if (!ul_opt) | |
809 | putchar (*s++); | |
810 | else { | |
811 | if (n >= 2 && s[0] == '_' && s[1] == '\b') { | |
812 | n -= 2; | |
813 | s += 2; | |
814 | c = *s++; | |
815 | state = 1; | |
816 | } else if (n >= 2 && s[1] == '\b' && s[2] == '_') { | |
817 | n -= 2; | |
818 | c = *s++; | |
819 | s += 2; | |
820 | state = 1; | |
821 | } else { | |
822 | c = *s++; | |
823 | state = 0; | |
824 | } | |
825 | if (state != pstate) | |
826 | tputs(state ? ULenter : ULexit, 1, putch); | |
827 | pstate = state; | |
828 | putchar(c); | |
829 | if (state && *chUL) { | |
830 | pr(chBS); | |
831 | tputs(chUL, 1, putch); | |
832 | } | |
833 | } | |
ffa58356 ES |
834 | } |
835 | ||
836 | /* | |
837 | ** Clear the screen | |
838 | */ | |
839 | ||
840 | doclear() | |
841 | { | |
842 | if (Clear && !hard) { | |
843 | tputs(Clear, 1, putch); | |
844 | ||
845 | /* Put out carriage return so that system doesn't | |
846 | ** get confused by escape sequences when expanding tabs | |
847 | */ | |
848 | putchar ('\r'); | |
849 | promptlen = 0; | |
850 | } | |
851 | } | |
852 | ||
38ccf597 BJ |
853 | /* |
854 | * Go to home position | |
855 | */ | |
856 | home() | |
857 | { | |
858 | tputs(Home,1,putch); | |
859 | } | |
860 | ||
ffa58356 ES |
861 | static int lastcmd, lastarg, lastp; |
862 | static int lastcolon; | |
863 | char shell_line[132]; | |
864 | ||
865 | /* | |
866 | ** Read a command and do it. A command consists of an optional integer | |
867 | ** argument followed by the command character. Return the number of lines | |
868 | ** to display in the next screenful. If there is nothing more to display | |
869 | ** in the current file, zero is returned. | |
870 | */ | |
871 | ||
872 | command (filename, f) | |
873 | char *filename; | |
874 | register FILE *f; | |
875 | { | |
876 | register int nlines; | |
877 | register int retval; | |
878 | register char c; | |
879 | char colonch; | |
880 | FILE *helpf; | |
881 | int done; | |
882 | char comchar, cmdbuf[80], *p; | |
883 | ||
884 | #define ret(val) retval=val;done++;break | |
885 | ||
886 | done = 0; | |
887 | if (!errors) | |
888 | prompt (filename); | |
889 | else | |
890 | errors = 0; | |
891 | if (MBIT == RAW && slow_tty) { | |
892 | otty.sg_flags |= MBIT; | |
893 | stty(2, &otty); | |
894 | } | |
895 | for (;;) { | |
896 | nlines = number (&comchar); | |
897 | lastp = colonch = 0; | |
898 | if (comchar == '.') { /* Repeat last command */ | |
899 | lastp++; | |
900 | comchar = lastcmd; | |
901 | nlines = lastarg; | |
902 | if (lastcmd == ':') | |
903 | colonch = lastcolon; | |
904 | } | |
905 | lastcmd = comchar; | |
906 | lastarg = nlines; | |
907 | if (comchar == otty.sg_erase) { | |
908 | kill_line (); | |
909 | prompt (filename); | |
910 | continue; | |
911 | } | |
912 | switch (comchar) { | |
913 | case ':': | |
914 | retval = colon (filename, colonch, nlines); | |
915 | if (retval >= 0) | |
916 | done++; | |
917 | break; | |
918 | case ' ': | |
919 | case 'z': | |
920 | if (nlines == 0) nlines = dlines; | |
921 | else if (comchar == 'z') dlines = nlines; | |
922 | ret (nlines); | |
923 | case 'd': | |
924 | case ctrl(D): | |
925 | if (nlines != 0) nscroll = nlines; | |
926 | ret (nscroll); | |
927 | case RUBOUT: | |
928 | case 'q': | |
929 | case 'Q': | |
930 | end_it (); | |
931 | case 's': | |
932 | case 'f': | |
933 | if (nlines == 0) nlines++; | |
934 | if (comchar == 'f') | |
935 | nlines *= dlines; | |
936 | putchar ('\r'); | |
937 | erase (0); | |
35bd36fc BJ |
938 | printf ("\n"); |
939 | if (clreol) | |
940 | cleareol (); | |
941 | printf ("...skipping %d line", nlines); | |
ffa58356 | 942 | if (nlines > 1) |
35bd36fc | 943 | pr ("s\n"); |
ffa58356 | 944 | else |
35bd36fc BJ |
945 | pr ("\n"); |
946 | ||
947 | if (clreol) | |
948 | cleareol (); | |
949 | pr ("\n"); | |
950 | ||
ffa58356 ES |
951 | while (nlines > 0) { |
952 | while ((c = Getc (f)) != '\n') | |
953 | if (c == EOF) { | |
954 | retval = 0; | |
955 | done++; | |
956 | goto endsw; | |
957 | } | |
958 | Currline++; | |
959 | nlines--; | |
960 | } | |
961 | ret (dlines); | |
962 | case '\n': | |
963 | if (nlines != 0) | |
964 | dlines = nlines; | |
965 | else | |
966 | nlines = 1; | |
967 | ret (nlines); | |
968 | case '\f': | |
969 | if (!no_intty) { | |
970 | doclear (); | |
971 | Fseek (f, screen_start.chrctr); | |
972 | Currline = screen_start.line; | |
973 | ret (dlines); | |
974 | } | |
975 | else { | |
976 | write (2, &bell, 1); | |
977 | break; | |
978 | } | |
979 | case '\'': | |
980 | if (!no_intty) { | |
981 | kill_line (); | |
982 | pr ("\n***Back***\n\n"); | |
983 | Fseek (f, context.chrctr); | |
984 | Currline = context.line; | |
985 | ret (dlines); | |
986 | } | |
987 | else { | |
988 | write (2, &bell, 1); | |
989 | break; | |
990 | } | |
991 | case '=': | |
992 | kill_line (); | |
993 | promptlen = printd (Currline); | |
994 | fflush (stdout); | |
995 | break; | |
996 | case 'n': | |
997 | lastp++; | |
998 | case '/': | |
999 | if (nlines == 0) nlines++; | |
1000 | kill_line (); | |
1001 | pr ("/"); | |
1002 | promptlen = 1; | |
1003 | fflush (stdout); | |
1004 | if (lastp) { | |
1005 | write (2,"\r", 1); | |
1006 | search (NULL, f, nlines); /* Use previous r.e. */ | |
1007 | } | |
1008 | else { | |
1009 | ttyin (cmdbuf, 78, '/'); | |
1010 | write (2, "\r", 1); | |
1011 | search (cmdbuf, f, nlines); | |
1012 | } | |
38ccf597 | 1013 | ret (dlines-1); |
ffa58356 ES |
1014 | case '!': |
1015 | do_shell (filename); | |
1016 | break; | |
1017 | case 'h': | |
1018 | if ((helpf = fopen (HELPFILE, "r")) == NULL) | |
1019 | error ("Can't open help file"); | |
1020 | if (noscroll) doclear (); | |
1021 | copy_file (helpf); | |
1022 | close (helpf); | |
1023 | prompt (filename); | |
1024 | break; | |
1025 | case 'v': /* This case should go right before default */ | |
1026 | if (!no_intty) { | |
1027 | kill_line (); | |
1028 | cmdbuf[0] = '+'; | |
1029 | scanstr (Currline, &cmdbuf[1]); | |
1030 | pr ("vi "); pr (cmdbuf); putchar (' '); pr (fnames[fnum]); | |
1031 | execute (filename, VI, "vi", cmdbuf, fnames[fnum], 0); | |
1032 | break; | |
1033 | } | |
1034 | default: | |
1035 | write (2, &bell, 1); | |
1036 | break; | |
1037 | } | |
1038 | if (done) break; | |
1039 | } | |
1040 | putchar ('\r'); | |
1041 | endsw: | |
1042 | inwait = 0; | |
1043 | notell++; | |
1044 | if (MBIT == RAW && slow_tty) { | |
1045 | otty.sg_flags &= ~MBIT; | |
1046 | stty(2, &otty); | |
1047 | } | |
1048 | return (retval); | |
1049 | } | |
1050 | ||
1051 | char ch; | |
1052 | ||
1053 | /* | |
1054 | * Execute a colon-prefixed command. | |
1055 | * Returns <0 if not a command that should cause | |
1056 | * more of the file to be printed. | |
1057 | */ | |
1058 | ||
1059 | colon (filename, cmd, nlines) | |
1060 | char *filename; | |
1061 | int cmd; | |
1062 | int nlines; | |
1063 | { | |
1064 | if (cmd == 0) | |
1065 | ch = readch (); | |
1066 | else | |
1067 | ch = cmd; | |
1068 | lastcolon = ch; | |
1069 | switch (ch) { | |
1070 | case 'f': | |
1071 | kill_line (); | |
1072 | if (!no_intty) | |
1073 | promptlen = printf ("\"%s\" line %d", fnames[fnum], Currline); | |
1074 | else | |
1075 | promptlen = printf ("[Not a file] line %d", Currline); | |
1076 | fflush (stdout); | |
1077 | return (-1); | |
1078 | case 'n': | |
1079 | if (nlines == 0) { | |
1080 | if (fnum >= nfiles - 1) | |
1081 | end_it (); | |
1082 | nlines++; | |
1083 | } | |
1084 | putchar ('\r'); | |
1085 | erase (0); | |
1086 | skipf (nlines); | |
1087 | return (0); | |
1088 | case 'p': | |
1089 | if (no_intty) { | |
1090 | write (2, &bell, 1); | |
1091 | return (-1); | |
1092 | } | |
1093 | putchar ('\r'); | |
1094 | erase (0); | |
1095 | if (nlines == 0) | |
1096 | nlines++; | |
1097 | skipf (-nlines); | |
1098 | return (0); | |
1099 | case '!': | |
1100 | do_shell (filename); | |
1101 | return (-1); | |
1102 | case 'q': | |
1103 | case 'Q': | |
1104 | end_it (); | |
1105 | default: | |
1106 | write (2, &bell, 1); | |
1107 | return (-1); | |
1108 | } | |
1109 | } | |
1110 | ||
1111 | /* | |
1112 | ** Read a decimal number from the terminal. Set cmd to the non-digit which | |
1113 | ** terminates the number. | |
1114 | */ | |
1115 | ||
1116 | number(cmd) | |
1117 | char *cmd; | |
1118 | { | |
1119 | register int i; | |
1120 | ||
1121 | i = 0; ch = otty.sg_kill; | |
1122 | for (;;) { | |
1123 | ch = readch (); | |
1124 | if (ch >= '0' && ch <= '9') | |
1125 | i = i*10 + ch - '0'; | |
1126 | else if (ch == otty.sg_kill) | |
1127 | i = 0; | |
1128 | else { | |
1129 | *cmd = ch; | |
1130 | break; | |
1131 | } | |
1132 | } | |
1133 | return (i); | |
1134 | } | |
1135 | ||
1136 | do_shell (filename) | |
1137 | char *filename; | |
1138 | { | |
1139 | char cmdbuf[80]; | |
1140 | ||
1141 | kill_line (); | |
1142 | pr ("!"); | |
1143 | fflush (stdout); | |
1144 | promptlen = 1; | |
1145 | if (lastp) | |
1146 | pr (shell_line); | |
1147 | else { | |
1148 | ttyin (cmdbuf, 78, '!'); | |
1149 | if (expand (shell_line, cmdbuf)) { | |
1150 | kill_line (); | |
1151 | promptlen = printf ("!%s", shell_line); | |
1152 | } | |
1153 | } | |
1154 | fflush (stdout); | |
1155 | write (2, "\n", 1); | |
1156 | promptlen = 0; | |
1157 | shellp = 1; | |
1158 | execute (filename, shell, shell, "-c", shell_line, 0); | |
1159 | } | |
1160 | ||
1161 | /* | |
1162 | ** Search for nth ocurrence of regular expression contained in buf in the file | |
1163 | */ | |
1164 | ||
1165 | search (buf, file, n) | |
1166 | char buf[]; | |
1167 | FILE *file; | |
1168 | register int n; | |
1169 | { | |
1170 | long startline = Ftell (file); | |
1171 | register long line1 = startline; | |
1172 | register long line2 = startline; | |
1173 | register long line3 = startline; | |
1174 | register int lncount; | |
1175 | int saveln, rv, re_exec(); | |
1176 | char *s, *re_comp(); | |
1177 | ||
1178 | context.line = saveln = Currline; | |
1179 | context.chrctr = startline; | |
1180 | lncount = 0; | |
1181 | if ((s = re_comp (buf)) != 0) | |
1182 | error (s); | |
1183 | while (!feof (file)) { | |
1184 | line3 = line2; | |
1185 | line2 = line1; | |
1186 | line1 = Ftell (file); | |
1187 | rdline (file); | |
1188 | lncount++; | |
1189 | if ((rv = re_exec (Line)) == 1) | |
1190 | if (--n == 0) { | |
1191 | if (lncount > 3 || (lncount > 1 && no_intty)) | |
38ccf597 BJ |
1192 | { |
1193 | pr ("\n"); | |
35bd36fc BJ |
1194 | if (clreol) |
1195 | cleareol (); | |
38ccf597 BJ |
1196 | pr("...skipping\n"); |
1197 | } | |
ffa58356 ES |
1198 | if (!no_intty) { |
1199 | Currline -= (lncount >= 3 ? 3 : lncount); | |
1200 | Fseek (file, line3); | |
35bd36fc BJ |
1201 | if (noscroll) |
1202 | if (clreol) { | |
1203 | home (); | |
1204 | cleareol (); | |
1205 | } | |
1206 | else | |
1207 | doclear (); | |
ffa58356 ES |
1208 | } |
1209 | else { | |
1210 | kill_line (); | |
35bd36fc BJ |
1211 | if (noscroll) |
1212 | if (clreol) { | |
1213 | home (); | |
1214 | cleareol (); | |
1215 | } | |
1216 | else | |
1217 | doclear (); | |
ffa58356 ES |
1218 | pr (Line); |
1219 | putchar ('\n'); | |
1220 | } | |
1221 | break; | |
1222 | } | |
1223 | else if (rv == -1) | |
1224 | error ("Regular expression botch"); | |
1225 | } | |
1226 | if (feof (file)) { | |
1227 | if (!no_intty) { | |
ffa58356 | 1228 | file->_flag &= ~_IOEOF; /* why doesn't fseek do this ??!!??! */ |
ffa58356 ES |
1229 | Currline = saveln; |
1230 | Fseek (file, startline); | |
1231 | } | |
1232 | else { | |
1233 | pr ("\nPattern not found\n"); | |
1234 | end_it (); | |
1235 | } | |
1236 | error ("Pattern not found"); | |
1237 | } | |
1238 | } | |
1239 | ||
1240 | execute (filename, cmd, args) | |
1241 | char *filename; | |
1242 | char *cmd, *args; | |
1243 | { | |
1244 | int id; | |
1245 | ||
1246 | fflush (stdout); | |
1247 | reset_tty (); | |
1248 | while ((id = fork ()) < 0) | |
1249 | sleep (5); | |
1250 | if (id == 0) { | |
1251 | execv (cmd, &args); | |
1252 | write (2, "exec failed\n", 12); | |
1253 | exit (1); | |
1254 | } | |
1255 | signal (SIGINT, SIG_IGN); | |
1256 | signal (SIGQUIT, SIG_IGN); | |
ffa58356 ES |
1257 | if (catch_susp) |
1258 | signal(SIGTSTP, SIG_DFL); | |
ffa58356 ES |
1259 | wait (0); |
1260 | signal (SIGINT, end_it); | |
1261 | signal (SIGQUIT, onquit); | |
ffa58356 ES |
1262 | if (catch_susp) |
1263 | signal(SIGTSTP, onsusp); | |
ffa58356 ES |
1264 | set_tty (); |
1265 | pr ("------------------------\n"); | |
1266 | prompt (filename); | |
1267 | } | |
1268 | /* | |
1269 | ** Skip n lines in the file f | |
1270 | */ | |
1271 | ||
1272 | skiplns (n, f) | |
1273 | register int n; | |
1274 | register FILE *f; | |
1275 | { | |
1276 | register char c; | |
1277 | ||
1278 | while (n > 0) { | |
1279 | while ((c = Getc (f)) != '\n') | |
1280 | if (c == EOF) | |
1281 | return; | |
1282 | n--; | |
1283 | Currline++; | |
1284 | } | |
1285 | } | |
1286 | ||
1287 | /* | |
1288 | ** Skip nskip files in the file list (from the command line). Nskip may be | |
1289 | ** negative. | |
1290 | */ | |
1291 | ||
1292 | skipf (nskip) | |
1293 | register int nskip; | |
1294 | { | |
1295 | if (nskip == 0) return; | |
1296 | if (nskip > 0) { | |
1297 | if (fnum + nskip > nfiles - 1) | |
1298 | nskip = nfiles - fnum - 1; | |
1299 | } | |
1300 | else if (within) | |
1301 | ++fnum; | |
1302 | fnum += nskip; | |
1303 | if (fnum < 0) | |
1304 | fnum = 0; | |
35bd36fc | 1305 | pr ("\n...Skipping "); |
38ccf597 | 1306 | pr ("\n"); |
35bd36fc BJ |
1307 | if (clreol) |
1308 | cleareol (); | |
38ccf597 | 1309 | pr ("...Skipping "); |
ffa58356 ES |
1310 | pr (nskip > 0 ? "to file " : "back to file "); |
1311 | pr (fnames[fnum]); | |
38ccf597 | 1312 | pr ("\n"); |
35bd36fc BJ |
1313 | if (clreol) |
1314 | cleareol (); | |
38ccf597 | 1315 | pr ("\n"); |
ffa58356 ES |
1316 | --fnum; |
1317 | } | |
1318 | ||
1319 | /*----------------------------- Terminal I/O -------------------------------*/ | |
1320 | ||
1321 | initterm () | |
1322 | { | |
1323 | char buf[TBUFSIZ]; | |
1324 | char clearbuf[100]; | |
1325 | char *clearptr, *padstr; | |
ffa58356 | 1326 | int ldisc; |
54decef9 | 1327 | char *term; |
ffa58356 ES |
1328 | |
1329 | setbuf(stdout, obuf); | |
1330 | if (!(no_tty = gtty(1, &otty))) { | |
8828eef4 | 1331 | if ((term = getenv("TERM")) == 0 || tgetent(buf, term) <= 0) { |
35bd36fc | 1332 | dumb++; ul_opt = 0; |
ffa58356 ES |
1333 | } |
1334 | else { | |
1335 | if (((Lpp = tgetnum("li")) < 0) || tgetflag("hc")) { | |
1336 | hard++; /* Hard copy terminal */ | |
1337 | Lpp = 24; | |
1338 | } | |
1339 | if (tailequ (fnames[0], "page") || !hard && tgetflag("ns")) | |
1340 | noscroll++; | |
1341 | if ((Mcol = tgetnum("co")) < 0) | |
1342 | Mcol = 80; | |
1343 | Wrap = tgetflag("am"); | |
1344 | bad_so = tgetflag ("xs"); | |
1345 | clearptr = clearbuf; | |
1346 | eraseln = tgetstr("ce",&clearptr); | |
1347 | Clear = tgetstr("cl", &clearptr); | |
1348 | Senter = tgetstr("so", &clearptr); | |
1349 | Sexit = tgetstr("se", &clearptr); | |
35bd36fc BJ |
1350 | |
1351 | /* | |
1352 | * Set up for underlining: some terminals don't need it; | |
1353 | * others have start/stop sequences, still others have an | |
1354 | * underline char sequence which is assumed to move the | |
1355 | * cursor forward one character. If underline sequence | |
1356 | * isn't available, settle for standout sequence. | |
1357 | */ | |
1358 | ||
1359 | if (tgetflag("ul") || tgetflag("os")) | |
1360 | ul_opt = 0; | |
1361 | if ((chUL = tgetstr("uc", &clearptr)) == NULL ) | |
1362 | chUL = ""; | |
1363 | if ((ULenter = tgetstr("us", &clearptr)) == NULL && | |
1364 | (!*chUL) && (ULenter = tgetstr("so", &clearptr)) == NULL) | |
1365 | ULenter = ""; | |
1366 | if ((ULexit = tgetstr("ue", &clearptr)) == NULL && | |
1367 | (!*chUL) && (ULexit = tgetstr("se", &clearptr)) == NULL) | |
1368 | ULexit = ""; | |
1369 | ||
ffa58356 ES |
1370 | if (padstr = tgetstr("pc", &clearptr)) |
1371 | PC = *padstr; | |
38ccf597 | 1372 | Home = tgetstr("ho",&clearptr); |
ddbe1116 | 1373 | if (Home == 0 || *Home == '\0') |
38ccf597 | 1374 | { |
35bd36fc BJ |
1375 | if ((cursorm = tgetstr("cm", &clearptr)) != NULL) { |
1376 | strcpy(cursorhome, tgoto(cursorm, 0, 0)); | |
38ccf597 BJ |
1377 | Home = cursorhome; |
1378 | } | |
1379 | } | |
35bd36fc | 1380 | EodClr = tgetstr("cd", &clearptr); |
ffa58356 ES |
1381 | } |
1382 | if ((shell = getenv("SHELL")) == NULL) | |
1383 | shell = "/bin/sh"; | |
1384 | } | |
1385 | no_intty = gtty(0, &otty); | |
1386 | gtty(2, &otty); | |
8828eef4 | 1387 | savetty = otty; |
ffa58356 ES |
1388 | ospeed = otty.sg_ospeed; |
1389 | slow_tty = ospeed < B1200; | |
1390 | hardtabs = !(otty.sg_flags & XTABS); | |
1391 | if (!no_tty) { | |
1392 | otty.sg_flags &= ~ECHO; | |
1393 | if (MBIT == CBREAK || !slow_tty) | |
1394 | otty.sg_flags |= MBIT; | |
1395 | } | |
1396 | } | |
1397 | ||
1398 | readch () | |
1399 | { | |
1400 | char ch; | |
1401 | extern int errno; | |
1402 | ||
1403 | if (read (2, &ch, 1) <= 0) | |
1404 | if (errno != EINTR) | |
1405 | exit(0); | |
1406 | else | |
1407 | ch = otty.sg_kill; | |
1408 | return (ch); | |
1409 | } | |
1410 | ||
1411 | static char BS = '\b'; | |
1412 | static char CARAT = '^'; | |
1413 | ||
1414 | ttyin (buf, nmax, pchar) | |
1415 | char buf[]; | |
1416 | register int nmax; | |
1417 | char pchar; | |
1418 | { | |
1419 | register char *sptr; | |
1420 | register char ch; | |
1421 | register int slash = 0; | |
1422 | int maxlen; | |
1423 | char cbuf; | |
1424 | ||
1425 | sptr = buf; | |
1426 | maxlen = 0; | |
1427 | while (sptr - buf < nmax) { | |
1428 | if (promptlen > maxlen) maxlen = promptlen; | |
1429 | ch = readch (); | |
1430 | if (ch == '\\') { | |
1431 | slash++; | |
1432 | } | |
1433 | else if ((ch == otty.sg_erase) && !slash) { | |
1434 | if (sptr > buf) { | |
1435 | --promptlen; | |
1436 | write (2, &BS, 1); | |
1437 | --sptr; | |
1438 | if ((*sptr < ' ' && *sptr != '\n') || *sptr == RUBOUT) { | |
1439 | --promptlen; | |
1440 | write (2, &BS, 1); | |
1441 | } | |
1442 | continue; | |
1443 | } | |
1444 | else { | |
1445 | if (!eraseln) promptlen = maxlen; | |
1446 | longjmp (restore, 1); | |
1447 | } | |
1448 | } | |
1449 | else if ((ch == otty.sg_kill) && !slash) { | |
1450 | if (hard) { | |
1451 | show (ch); | |
1452 | putchar ('\n'); | |
1453 | putchar (pchar); | |
1454 | } | |
1455 | else { | |
1456 | putchar ('\r'); | |
1457 | putchar (pchar); | |
1458 | if (eraseln) | |
1459 | erase (1); | |
1460 | promptlen = 1; | |
1461 | } | |
1462 | sptr = buf; | |
1463 | fflush (stdout); | |
1464 | continue; | |
1465 | } | |
1466 | if (slash && (ch == otty.sg_kill || ch == otty.sg_erase)) { | |
1467 | write (2, &BS, 1); | |
1468 | --sptr; | |
1469 | } | |
1470 | if (ch != '\\') | |
1471 | slash = 0; | |
1472 | *sptr++ = ch; | |
1473 | if ((ch < ' ' && ch != '\n' && ch != ESC) || ch == RUBOUT) { | |
1474 | ch += ch == RUBOUT ? -0100 : 0100; | |
1475 | write (2, &CARAT, 1); | |
1476 | promptlen++; | |
1477 | } | |
1478 | cbuf = ch; | |
1479 | if (ch != '\n' && ch != ESC) { | |
1480 | write (2, &cbuf, 1); | |
1481 | promptlen++; | |
1482 | } | |
1483 | else | |
1484 | break; | |
1485 | } | |
1486 | *--sptr = '\0'; | |
1487 | if (!eraseln) promptlen = maxlen; | |
1488 | if (sptr - buf >= nmax - 1) | |
1489 | error ("Line too long"); | |
1490 | } | |
1491 | ||
1492 | expand (outbuf, inbuf) | |
1493 | char *outbuf; | |
1494 | char *inbuf; | |
1495 | { | |
1496 | register char *instr; | |
1497 | register char *outstr; | |
1498 | register char ch; | |
1499 | char temp[200]; | |
1500 | int changed = 0; | |
1501 | ||
1502 | instr = inbuf; | |
1503 | outstr = temp; | |
1504 | while ((ch = *instr++) != '\0') | |
1505 | switch (ch) { | |
1506 | case '%': | |
1507 | if (!no_intty) { | |
1508 | strcpy (outstr, fnames[fnum]); | |
1509 | outstr += strlen (fnames[fnum]); | |
1510 | changed++; | |
1511 | } | |
1512 | else | |
1513 | *outstr++ = ch; | |
1514 | break; | |
1515 | case '!': | |
1516 | if (!shellp) | |
1517 | error ("No previous command to substitute for"); | |
1518 | strcpy (outstr, shell_line); | |
1519 | outstr += strlen (shell_line); | |
1520 | changed++; | |
1521 | break; | |
1522 | case '\\': | |
1523 | if (*instr == '%' || *instr == '!') { | |
1524 | *outstr++ = *instr++; | |
1525 | break; | |
1526 | } | |
1527 | default: | |
1528 | *outstr++ = ch; | |
1529 | } | |
1530 | *outstr++ = '\0'; | |
1531 | strcpy (outbuf, temp); | |
1532 | return (changed); | |
1533 | } | |
1534 | ||
1535 | show (ch) | |
1536 | register char ch; | |
1537 | { | |
1538 | char cbuf; | |
1539 | ||
1540 | if ((ch < ' ' && ch != '\n' && ch != ESC) || ch == RUBOUT) { | |
1541 | ch += ch == RUBOUT ? -0100 : 0100; | |
1542 | write (2, &CARAT, 1); | |
1543 | promptlen++; | |
1544 | } | |
1545 | cbuf = ch; | |
1546 | write (2, &cbuf, 1); | |
1547 | promptlen++; | |
1548 | } | |
1549 | ||
1550 | error (mess) | |
1551 | char *mess; | |
1552 | { | |
35bd36fc BJ |
1553 | if (clreol) |
1554 | cleareol (); | |
1555 | else | |
1556 | kill_line (); | |
ffa58356 ES |
1557 | promptlen += strlen (mess); |
1558 | if (Senter && Sexit) { | |
1559 | tputs (Senter, 1, putch); | |
1560 | pr(mess); | |
1561 | tputs (Sexit, 1, putch); | |
1562 | } | |
1563 | else | |
1564 | pr (mess); | |
1565 | fflush(stdout); | |
1566 | errors++; | |
1567 | longjmp (restore, 1); | |
1568 | } | |
1569 | ||
1570 | ||
1571 | set_tty () | |
1572 | { | |
1573 | otty.sg_flags |= MBIT; | |
1574 | otty.sg_flags &= ~ECHO; | |
1575 | stty(2, &otty); | |
1576 | } | |
1577 | ||
1578 | reset_tty () | |
1579 | { | |
1580 | otty.sg_flags |= ECHO; | |
1581 | otty.sg_flags &= ~MBIT; | |
8828eef4 | 1582 | stty(2, &savetty); |
ffa58356 ES |
1583 | } |
1584 | ||
1585 | rdline (f) | |
1586 | register FILE *f; | |
1587 | { | |
1588 | register char c; | |
1589 | register char *p; | |
1590 | ||
1591 | p = Line; | |
1592 | while ((c = Getc (f)) != '\n' && c != EOF && p - Line < LINSIZ - 1) | |
1593 | *p++ = c; | |
1594 | if (c == '\n') | |
1595 | Currline++; | |
1596 | *p = '\0'; | |
1597 | } | |
1598 | ||
1599 | /* Come here when we get a suspend signal from the terminal */ | |
1600 | ||
ffa58356 ES |
1601 | onsusp () |
1602 | { | |
910bcc08 MK |
1603 | /* ignore SIGTTOU so we don't get stopped if csh grabs the tty */ |
1604 | signal(SIGTTOU, SIG_IGN); | |
ffa58356 ES |
1605 | reset_tty (); |
1606 | fflush (stdout); | |
910bcc08 | 1607 | signal(SIGTTOU, SIG_DFL); |
ffa58356 | 1608 | /* Send the TSTP signal to suspend our process group */ |
2d4fa3b8 SL |
1609 | signal(SIGTSTP, SIG_DFL); |
1610 | sigsetmask(0); | |
ffa58356 ES |
1611 | kill (0, SIGTSTP); |
1612 | /* Pause for station break */ | |
1613 | ||
1614 | /* We're back */ | |
1615 | signal (SIGTSTP, onsusp); | |
1616 | set_tty (); | |
1617 | if (inwait) | |
1618 | longjmp (restore); | |
1619 | } |