Commit | Line | Data |
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5ff67f98 DF |
1 | /* |
2 | * Copyright (c) 1980 Regents of the University of California. | |
d093b928 KB |
3 | * All rights reserved. |
4 | * | |
5 | * Redistribution and use in source and binary forms are permitted | |
6 | * provided that this notice is preserved and that due credit is given | |
7 | * to the University of California at Berkeley. The name of the University | |
8 | * may not be used to endorse or promote products derived from this | |
9 | * software without specific written prior permission. This software | |
10 | * is provided ``as is'' without express or implied warranty. | |
5ff67f98 DF |
11 | */ |
12 | ||
13 | #ifndef lint | |
14 | char copyright[] = | |
15 | "@(#) Copyright (c) 1980 Regents of the University of California.\n\ | |
16 | All rights reserved.\n"; | |
d093b928 | 17 | #endif /* not lint */ |
5ff67f98 | 18 | |
8b7ec80f | 19 | #ifndef lint |
9b2b5ff7 | 20 | static char sccsid[] = "@(#)more.c 5.15 (Berkeley) %G%"; |
d093b928 | 21 | #endif /* not lint */ |
35bd36fc | 22 | |
ffa58356 ES |
23 | /* |
24 | ** more.c - General purpose tty output filter and file perusal program | |
25 | ** | |
26 | ** by Eric Shienbrood, UC Berkeley | |
35bd36fc BJ |
27 | ** |
28 | ** modified by Geoff Peck, UCB to add underlining, single spacing | |
29 | ** modified by John Foderaro, UCB to add -c and MORE environment variable | |
ffa58356 ES |
30 | */ |
31 | ||
ffa58356 | 32 | #include <stdio.h> |
d093b928 | 33 | #include <sys/param.h> |
ffa58356 ES |
34 | #include <ctype.h> |
35 | #include <signal.h> | |
36 | #include <errno.h> | |
37 | #include <sgtty.h> | |
38 | #include <setjmp.h> | |
ffa58356 | 39 | #include <sys/stat.h> |
93b6d4e3 | 40 | #include <sys/file.h> |
d093b928 KB |
41 | #include <a.out.h> |
42 | #include <varargs.h> | |
ffa58356 | 43 | |
8b7ec80f SL |
44 | #define HELPFILE "/usr/lib/more.help" |
45 | #define VI "/usr/ucb/vi" | |
ffa58356 ES |
46 | |
47 | #define Fopen(s,m) (Currline = 0,file_pos=0,fopen(s,m)) | |
48 | #define Ftell(f) file_pos | |
49 | #define Fseek(f,off) (file_pos=off,fseek(f,off,0)) | |
50 | #define Getc(f) (++file_pos, getc(f)) | |
51 | #define Ungetc(c,f) (--file_pos, ungetc(c,f)) | |
52 | ||
ffa58356 ES |
53 | #define MBIT CBREAK |
54 | #define stty(fd,argp) ioctl(fd,TIOCSETN,argp) | |
ffa58356 ES |
55 | |
56 | #define TBUFSIZ 1024 | |
57 | #define LINSIZ 256 | |
58 | #define ctrl(letter) ('letter' & 077) | |
59 | #define RUBOUT '\177' | |
60 | #define ESC '\033' | |
61 | #define QUIT '\034' | |
62 | ||
d730d1dc | 63 | struct sgttyb otty, savetty; |
ffa58356 ES |
64 | long file_pos, file_size; |
65 | int fnum, no_intty, no_tty, slow_tty; | |
f27fb120 | 66 | int dum_opt, dlines, onquit(), end_it(), chgwinsz(); |
ffa58356 | 67 | int onsusp(); |
ffa58356 ES |
68 | int nscroll = 11; /* Number of lines scrolled by 'd' */ |
69 | int fold_opt = 1; /* Fold long lines */ | |
70 | int stop_opt = 1; /* Stop after form feeds */ | |
35bd36fc BJ |
71 | int ssp_opt = 0; /* Suppress white space */ |
72 | int ul_opt = 1; /* Underline as best we can */ | |
ffa58356 ES |
73 | int promptlen; |
74 | int Currline; /* Line we are currently at */ | |
75 | int startup = 1; | |
76 | int firstf = 1; | |
77 | int notell = 1; | |
4a56d647 CL |
78 | int docrterase = 0; |
79 | int docrtkill = 0; | |
ffa58356 ES |
80 | int bad_so; /* True if overwriting does not turn off standout */ |
81 | int inwait, Pause, errors; | |
82 | int within; /* true if we are within a file, | |
83 | false if we are between files */ | |
06e20570 | 84 | int hard, dumb, noscroll, hardtabs, clreol, eatnl; |
ffa58356 ES |
85 | int catch_susp; /* We should catch the SIGTSTP signal */ |
86 | char **fnames; /* The list of file names */ | |
87 | int nfiles; /* Number of files left to process */ | |
88 | char *shell; /* The name of the shell to use */ | |
89 | int shellp; /* A previous shell command exists */ | |
90 | char ch; | |
91 | jmp_buf restore; | |
ffa58356 ES |
92 | char Line[LINSIZ]; /* Line buffer */ |
93 | int Lpp = 24; /* lines per page */ | |
94 | char *Clear; /* clear screen */ | |
95 | char *eraseln; /* erase line */ | |
96 | char *Senter, *Sexit;/* enter and exit standout mode */ | |
35bd36fc BJ |
97 | char *ULenter, *ULexit; /* enter and exit underline mode */ |
98 | char *chUL; /* underline character */ | |
99 | char *chBS; /* backspace character */ | |
38ccf597 BJ |
100 | char *Home; /* go to home */ |
101 | char *cursorm; /* cursor movement */ | |
102 | char cursorhome[40]; /* contains cursor movement to home */ | |
35bd36fc | 103 | char *EodClr; /* clear rest of screen */ |
ffa58356 ES |
104 | char *tgetstr(); |
105 | int Mcol = 80; /* number of columns */ | |
106 | int Wrap = 1; /* set if automargins */ | |
2c880657 JK |
107 | int soglitch; /* terminal has standout mode glitch */ |
108 | int ulglitch; /* terminal has underline mode glitch */ | |
109 | int pstate = 0; /* current UL state */ | |
ffa58356 | 110 | long fseek(); |
38ccf597 | 111 | char *getenv(); |
ffa58356 ES |
112 | struct { |
113 | long chrctr, line; | |
114 | } context, screen_start; | |
115 | extern char PC; /* pad character */ | |
116 | extern short ospeed; | |
117 | ||
118 | ||
119 | main(argc, argv) | |
120 | int argc; | |
121 | char *argv[]; | |
122 | { | |
123 | register FILE *f; | |
124 | register char *s; | |
125 | register char *p; | |
126 | register char ch; | |
127 | register int left; | |
d730d1dc | 128 | int prnames = 0; |
ffa58356 ES |
129 | int initopt = 0; |
130 | int srchopt = 0; | |
131 | int clearit = 0; | |
132 | int initline; | |
133 | char initbuf[80]; | |
134 | FILE *checkf(); | |
135 | ||
136 | nfiles = argc; | |
137 | fnames = argv; | |
138 | initterm (); | |
88cdaae7 RC |
139 | nscroll = Lpp/2 - 1; |
140 | if (nscroll <= 0) | |
141 | nscroll = 1; | |
38ccf597 | 142 | if(s = getenv("MORE")) argscan(s); |
ffa58356 ES |
143 | while (--nfiles > 0) { |
144 | if ((ch = (*++fnames)[0]) == '-') { | |
38ccf597 | 145 | argscan(*fnames+1); |
ffa58356 ES |
146 | } |
147 | else if (ch == '+') { | |
148 | s = *fnames; | |
149 | if (*++s == '/') { | |
150 | srchopt++; | |
151 | for (++s, p = initbuf; p < initbuf + 79 && *s != '\0';) | |
152 | *p++ = *s++; | |
153 | *p = '\0'; | |
154 | } | |
155 | else { | |
156 | initopt++; | |
157 | for (initline = 0; *s != '\0'; s++) | |
158 | if (isdigit (*s)) | |
159 | initline = initline*10 + *s -'0'; | |
160 | --initline; | |
161 | } | |
162 | } | |
163 | else break; | |
164 | } | |
35bd36fc | 165 | /* allow clreol only if Home and eraseln and EodClr strings are |
38ccf597 BJ |
166 | * defined, and in that case, make sure we are in noscroll mode |
167 | */ | |
168 | if(clreol) | |
169 | { | |
8b9ba60d RC |
170 | if((Home == NULL) || (*Home == '\0') || |
171 | (eraseln == NULL) || (*eraseln == '\0') || | |
172 | (EodClr == NULL) || (*EodClr == '\0') ) | |
173 | clreol = 0; | |
38ccf597 BJ |
174 | else noscroll = 1; |
175 | } | |
ffa58356 ES |
176 | if (dlines == 0) |
177 | dlines = Lpp - (noscroll ? 1 : 2); | |
178 | left = dlines; | |
179 | if (nfiles > 1) | |
180 | prnames++; | |
181 | if (!no_intty && nfiles == 0) { | |
182 | fputs("Usage: ",stderr); | |
183 | fputs(argv[0],stderr); | |
184 | fputs(" [-dfln] [+linenum | +/pattern] name1 name2 ...\n",stderr); | |
185 | exit(1); | |
186 | } | |
187 | else | |
188 | f = stdin; | |
189 | if (!no_tty) { | |
190 | signal(SIGQUIT, onquit); | |
191 | signal(SIGINT, end_it); | |
f27fb120 | 192 | signal(SIGWINCH, chgwinsz); |
ffa58356 ES |
193 | if (signal (SIGTSTP, SIG_IGN) == SIG_DFL) { |
194 | signal(SIGTSTP, onsusp); | |
195 | catch_susp++; | |
196 | } | |
d730d1dc | 197 | stty (fileno(stderr), &otty); |
ffa58356 ES |
198 | } |
199 | if (no_intty) { | |
200 | if (no_tty) | |
201 | copy_file (stdin); | |
202 | else { | |
203 | if ((ch = Getc (f)) == '\f') | |
35bd36fc | 204 | doclear(); |
ffa58356 ES |
205 | else { |
206 | Ungetc (ch, f); | |
35bd36fc BJ |
207 | if (noscroll && (ch != EOF)) { |
208 | if (clreol) | |
209 | home (); | |
210 | else | |
211 | doclear (); | |
38ccf597 | 212 | } |
ffa58356 ES |
213 | } |
214 | if (srchopt) | |
38ccf597 | 215 | { |
ffa58356 | 216 | search (initbuf, stdin, 1); |
35bd36fc BJ |
217 | if (noscroll) |
218 | left--; | |
38ccf597 | 219 | } |
ffa58356 ES |
220 | else if (initopt) |
221 | skiplns (initline, stdin); | |
222 | screen (stdin, left); | |
223 | } | |
224 | no_intty = 0; | |
225 | prnames++; | |
226 | firstf = 0; | |
227 | } | |
228 | ||
229 | while (fnum < nfiles) { | |
230 | if ((f = checkf (fnames[fnum], &clearit)) != NULL) { | |
231 | context.line = context.chrctr = 0; | |
232 | Currline = 0; | |
233 | if (firstf) setjmp (restore); | |
234 | if (firstf) { | |
235 | firstf = 0; | |
236 | if (srchopt) | |
38ccf597 | 237 | { |
ffa58356 | 238 | search (initbuf, f, 1); |
35bd36fc BJ |
239 | if (noscroll) |
240 | left--; | |
38ccf597 | 241 | } |
ffa58356 ES |
242 | else if (initopt) |
243 | skiplns (initline, f); | |
244 | } | |
245 | else if (fnum < nfiles && !no_tty) { | |
246 | setjmp (restore); | |
247 | left = command (fnames[fnum], f); | |
248 | } | |
249 | if (left != 0) { | |
d093b928 | 250 | if ((noscroll || clearit) && (file_size != LONG_MAX)) |
35bd36fc BJ |
251 | if (clreol) |
252 | home (); | |
253 | else | |
254 | doclear (); | |
ffa58356 ES |
255 | if (prnames) { |
256 | if (bad_so) | |
257 | erase (0); | |
35bd36fc BJ |
258 | if (clreol) |
259 | cleareol (); | |
ffa58356 ES |
260 | pr("::::::::::::::"); |
261 | if (promptlen > 14) | |
262 | erase (14); | |
38ccf597 BJ |
263 | printf ("\n"); |
264 | if(clreol) cleareol(); | |
265 | printf("%s\n", fnames[fnum]); | |
266 | if(clreol) cleareol(); | |
8784a475 | 267 | printf("::::::::::::::\n"); |
ffa58356 ES |
268 | if (left > Lpp - 4) |
269 | left = Lpp - 4; | |
270 | } | |
271 | if (no_tty) | |
272 | copy_file (f); | |
273 | else { | |
274 | within++; | |
275 | screen(f, left); | |
276 | within = 0; | |
277 | } | |
278 | } | |
279 | setjmp (restore); | |
280 | fflush(stdout); | |
281 | fclose(f); | |
282 | screen_start.line = screen_start.chrctr = 0L; | |
283 | context.line = context.chrctr = 0L; | |
284 | } | |
285 | fnum++; | |
286 | firstf = 0; | |
287 | } | |
288 | reset_tty (); | |
289 | exit(0); | |
290 | } | |
291 | ||
38ccf597 BJ |
292 | argscan(s) |
293 | char *s; | |
294 | { | |
6444353d KB |
295 | int seen_num = 0; |
296 | ||
297 | while (*s != '\0') { | |
298 | switch (*s) { | |
718f6e88 KL |
299 | case '0': case '1': case '2': |
300 | case '3': case '4': case '5': | |
301 | case '6': case '7': case '8': | |
302 | case '9': | |
6444353d KB |
303 | if (!seen_num) { |
304 | dlines = 0; | |
305 | seen_num = 1; | |
306 | } | |
718f6e88 KL |
307 | dlines = dlines*10 + *s - '0'; |
308 | break; | |
309 | case 'd': | |
310 | dum_opt = 1; | |
311 | break; | |
312 | case 'l': | |
313 | stop_opt = 0; | |
314 | break; | |
315 | case 'f': | |
316 | fold_opt = 0; | |
317 | break; | |
318 | case 'p': | |
319 | noscroll++; | |
320 | break; | |
321 | case 'c': | |
322 | clreol++; | |
323 | break; | |
324 | case 's': | |
325 | ssp_opt = 1; | |
326 | break; | |
327 | case 'u': | |
328 | ul_opt = 0; | |
329 | break; | |
330 | } | |
6444353d | 331 | s++; |
718f6e88 | 332 | } |
38ccf597 BJ |
333 | } |
334 | ||
335 | ||
ffa58356 ES |
336 | /* |
337 | ** Check whether the file named by fs is an ASCII file which the user may | |
338 | ** access. If it is, return the opened file. Otherwise return NULL. | |
339 | */ | |
340 | ||
341 | FILE * | |
342 | checkf (fs, clearfirst) | |
d093b928 KB |
343 | register char *fs; |
344 | int *clearfirst; | |
ffa58356 | 345 | { |
d093b928 KB |
346 | struct stat stbuf; |
347 | register FILE *f; | |
348 | char c; | |
ffa58356 | 349 | |
d093b928 KB |
350 | if (stat (fs, &stbuf) == -1) { |
351 | (void)fflush(stdout); | |
352 | if (clreol) | |
353 | cleareol (); | |
354 | perror(fs); | |
355 | return((FILE *)NULL); | |
356 | } | |
357 | if ((stbuf.st_mode & S_IFMT) == S_IFDIR) { | |
358 | printf("\n*** %s: directory ***\n\n", fs); | |
359 | return((FILE *)NULL); | |
360 | } | |
361 | if ((f = Fopen(fs, "r")) == NULL) { | |
362 | (void)fflush(stdout); | |
363 | perror(fs); | |
364 | return((FILE *)NULL); | |
365 | } | |
366 | if (magic(f, fs)) | |
367 | return((FILE *)NULL); | |
368 | c = Getc(f); | |
369 | *clearfirst = c == '\f'; | |
ffa58356 | 370 | Ungetc (c, f); |
d093b928 KB |
371 | if ((file_size = stbuf.st_size) == 0) |
372 | file_size = LONG_MAX; | |
373 | return(f); | |
ffa58356 ES |
374 | } |
375 | ||
93b6d4e3 | 376 | /* |
d093b928 KB |
377 | * magic -- |
378 | * check for file magic numbers. This code would best be shared with | |
379 | * the file(1) program or, perhaps, more should not try and be so smart? | |
93b6d4e3 | 380 | */ |
d093b928 KB |
381 | static |
382 | magic(f, fs) | |
383 | FILE *f; | |
384 | char *fs; | |
93b6d4e3 | 385 | { |
d093b928 | 386 | struct exec ex; |
93b6d4e3 | 387 | |
d093b928 KB |
388 | if (fread(&ex, sizeof(ex), 1, f) == 1) |
389 | switch(ex.a_magic) { | |
390 | case OMAGIC: | |
391 | case NMAGIC: | |
392 | case ZMAGIC: | |
393 | case 0405: | |
394 | case 0411: | |
395 | case 0177545: | |
396 | printf("\n******** %s: Not a text file ********\n\n", fs); | |
397 | (void)fclose(f); | |
398 | return(1); | |
399 | } | |
400 | (void)fseek(f, 0L, L_SET); /* rewind() not necessary */ | |
401 | return(NULL); | |
93b6d4e3 KM |
402 | } |
403 | ||
ffa58356 ES |
404 | /* |
405 | ** A real function, for the tputs routine in termlib | |
406 | */ | |
407 | ||
408 | putch (ch) | |
409 | char ch; | |
410 | { | |
411 | putchar (ch); | |
412 | } | |
413 | ||
414 | /* | |
415 | ** Print out the contents of the file f, one screenful at a time. | |
416 | */ | |
417 | ||
418 | #define STOP -10 | |
419 | ||
420 | screen (f, num_lines) | |
421 | register FILE *f; | |
422 | register int num_lines; | |
423 | { | |
424 | register int c; | |
425 | register int nchars; | |
35bd36fc BJ |
426 | int length; /* length of current line */ |
427 | static int prev_len = 1; /* length of previous line */ | |
ffa58356 ES |
428 | |
429 | for (;;) { | |
430 | while (num_lines > 0 && !Pause) { | |
431 | if ((nchars = getline (f, &length)) == EOF) | |
38ccf597 | 432 | { |
35bd36fc BJ |
433 | if (clreol) |
434 | clreos(); | |
ffa58356 | 435 | return; |
38ccf597 | 436 | } |
35bd36fc BJ |
437 | if (ssp_opt && length == 0 && prev_len == 0) |
438 | continue; | |
439 | prev_len = length; | |
ffa58356 ES |
440 | if (bad_so || (Senter && *Senter == ' ') && promptlen > 0) |
441 | erase (0); | |
35bd36fc BJ |
442 | /* must clear before drawing line since tabs on some terminals |
443 | * do not erase what they tab over. | |
444 | */ | |
445 | if (clreol) | |
446 | cleareol (); | |
ffa58356 ES |
447 | prbuf (Line, length); |
448 | if (nchars < promptlen) | |
449 | erase (nchars); /* erase () sets promptlen to 0 */ | |
450 | else promptlen = 0; | |
35bd36fc BJ |
451 | /* is this needed? |
452 | * if (clreol) | |
453 | * cleareol(); /* must clear again in case we wrapped * | |
454 | */ | |
ffa58356 | 455 | if (nchars < Mcol || !fold_opt) |
2c880657 | 456 | prbuf("\n", 1); /* will turn off UL if necessary */ |
ffa58356 ES |
457 | if (nchars == STOP) |
458 | break; | |
459 | num_lines--; | |
460 | } | |
2c880657 JK |
461 | if (pstate) { |
462 | tputs(ULexit, 1, putch); | |
463 | pstate = 0; | |
464 | } | |
ffa58356 ES |
465 | fflush(stdout); |
466 | if ((c = Getc(f)) == EOF) | |
38ccf597 | 467 | { |
35bd36fc BJ |
468 | if (clreol) |
469 | clreos (); | |
ffa58356 | 470 | return; |
38ccf597 BJ |
471 | } |
472 | ||
35bd36fc BJ |
473 | if (Pause && clreol) |
474 | clreos (); | |
ffa58356 ES |
475 | Ungetc (c, f); |
476 | setjmp (restore); | |
477 | Pause = 0; startup = 0; | |
478 | if ((num_lines = command (NULL, f)) == 0) | |
479 | return; | |
480 | if (hard && promptlen > 0) | |
481 | erase (0); | |
a97c843b | 482 | if (noscroll && num_lines >= dlines) |
d730d1dc | 483 | { |
35bd36fc BJ |
484 | if (clreol) |
485 | home(); | |
486 | else | |
487 | doclear (); | |
38ccf597 | 488 | } |
ffa58356 ES |
489 | screen_start.line = Currline; |
490 | screen_start.chrctr = Ftell (f); | |
491 | } | |
492 | } | |
493 | ||
494 | /* | |
495 | ** Come here if a quit signal is received | |
496 | */ | |
497 | ||
498 | onquit() | |
499 | { | |
500 | signal(SIGQUIT, SIG_IGN); | |
501 | if (!inwait) { | |
502 | putchar ('\n'); | |
503 | if (!startup) { | |
504 | signal(SIGQUIT, onquit); | |
505 | longjmp (restore, 1); | |
506 | } | |
507 | else | |
508 | Pause++; | |
509 | } | |
510 | else if (!dum_opt && notell) { | |
511 | write (2, "[Use q or Q to quit]", 20); | |
512 | promptlen += 20; | |
513 | notell = 0; | |
514 | } | |
515 | signal(SIGQUIT, onquit); | |
516 | } | |
517 | ||
f27fb120 DS |
518 | /* |
519 | ** Come here if a signal for a window size change is received | |
520 | */ | |
521 | ||
522 | chgwinsz() | |
523 | { | |
524 | struct winsize win; | |
525 | ||
526 | (void) signal(SIGWINCH, SIG_IGN); | |
527 | if (ioctl(fileno(stdout), TIOCGWINSZ, &win) != -1) { | |
528 | if (win.ws_row != 0) { | |
529 | Lpp = win.ws_row; | |
530 | nscroll = Lpp/2 - 1; | |
531 | if (nscroll <= 0) | |
532 | nscroll = 1; | |
533 | dlines = Lpp - (noscroll ? 1 : 2); | |
534 | } | |
535 | if (win.ws_col != 0) | |
536 | Mcol = win.ws_col; | |
537 | } | |
538 | (void) signal(SIGWINCH, chgwinsz); | |
539 | } | |
540 | ||
ffa58356 ES |
541 | /* |
542 | ** Clean up terminal state and exit. Also come here if interrupt signal received | |
543 | */ | |
544 | ||
545 | end_it () | |
546 | { | |
547 | ||
548 | reset_tty (); | |
35bd36fc BJ |
549 | if (clreol) { |
550 | putchar ('\r'); | |
551 | clreos (); | |
552 | fflush (stdout); | |
553 | } | |
38ccf597 | 554 | else if (!clreol && (promptlen > 0)) { |
ffa58356 ES |
555 | kill_line (); |
556 | fflush (stdout); | |
557 | } | |
558 | else | |
559 | write (2, "\n", 1); | |
560 | _exit(0); | |
561 | } | |
562 | ||
563 | copy_file(f) | |
564 | register FILE *f; | |
565 | { | |
566 | register int c; | |
567 | ||
568 | while ((c = getc(f)) != EOF) | |
569 | putchar(c); | |
570 | } | |
571 | ||
572 | /* Simplified printf function */ | |
573 | ||
9b2b5ff7 | 574 | printf (fmt, va_alist) |
ffa58356 | 575 | register char *fmt; |
9b2b5ff7 | 576 | va_dcl |
ffa58356 | 577 | { |
9b2b5ff7 | 578 | va_list ap; |
ffa58356 ES |
579 | register char ch; |
580 | register int ccount; | |
581 | ||
582 | ccount = 0; | |
9b2b5ff7 | 583 | va_start(ap); |
ffa58356 ES |
584 | while (*fmt) { |
585 | while ((ch = *fmt++) != '%') { | |
586 | if (ch == '\0') | |
587 | return (ccount); | |
588 | ccount++; | |
589 | putchar (ch); | |
590 | } | |
591 | switch (*fmt++) { | |
592 | case 'd': | |
9b2b5ff7 | 593 | ccount += printd (va_arg(ap, int)); |
ffa58356 ES |
594 | break; |
595 | case 's': | |
9b2b5ff7 | 596 | ccount += pr (va_arg(ap, char *)); |
ffa58356 ES |
597 | break; |
598 | case '%': | |
599 | ccount++; | |
ffa58356 ES |
600 | putchar ('%'); |
601 | break; | |
602 | case '0': | |
603 | return (ccount); | |
604 | default: | |
605 | break; | |
606 | } | |
ffa58356 | 607 | } |
9b2b5ff7 | 608 | va_end(ap); |
ffa58356 ES |
609 | return (ccount); |
610 | ||
611 | } | |
612 | ||
613 | /* | |
614 | ** Print an integer as a string of decimal digits, | |
615 | ** returning the length of the print representation. | |
616 | */ | |
617 | ||
618 | printd (n) | |
619 | int n; | |
620 | { | |
621 | int a, nchars; | |
622 | ||
623 | if (a = n/10) | |
624 | nchars = 1 + printd(a); | |
625 | else | |
626 | nchars = 1; | |
627 | putchar (n % 10 + '0'); | |
628 | return (nchars); | |
629 | } | |
630 | ||
631 | /* Put the print representation of an integer into a string */ | |
632 | static char *sptr; | |
633 | ||
634 | scanstr (n, str) | |
635 | int n; | |
636 | char *str; | |
637 | { | |
638 | sptr = str; | |
718f6e88 | 639 | Sprintf (n); |
ffa58356 ES |
640 | *sptr = '\0'; |
641 | } | |
642 | ||
718f6e88 | 643 | Sprintf (n) |
ffa58356 ES |
644 | { |
645 | int a; | |
646 | ||
647 | if (a = n/10) | |
718f6e88 | 648 | Sprintf (a); |
ffa58356 ES |
649 | *sptr++ = n % 10 + '0'; |
650 | } | |
651 | ||
652 | static char bell = ctrl(G); | |
653 | ||
654 | strlen (s) | |
655 | char *s; | |
656 | { | |
657 | register char *p; | |
658 | ||
659 | p = s; | |
660 | while (*p++) | |
661 | ; | |
662 | return (p - s - 1); | |
663 | } | |
664 | ||
665 | /* See whether the last component of the path name "path" is equal to the | |
666 | ** string "string" | |
667 | */ | |
668 | ||
669 | tailequ (path, string) | |
670 | char *path; | |
671 | register char *string; | |
672 | { | |
673 | register char *tail; | |
674 | ||
675 | tail = path + strlen(path); | |
676 | while (tail >= path) | |
677 | if (*(--tail) == '/') | |
678 | break; | |
679 | ++tail; | |
680 | while (*tail++ == *string++) | |
681 | if (*tail == '\0') | |
682 | return(1); | |
683 | return(0); | |
684 | } | |
685 | ||
686 | prompt (filename) | |
687 | char *filename; | |
688 | { | |
35bd36fc BJ |
689 | if (clreol) |
690 | cleareol (); | |
38ccf597 | 691 | else if (promptlen > 0) |
ffa58356 ES |
692 | kill_line (); |
693 | if (!hard) { | |
694 | promptlen = 8; | |
2c880657 | 695 | if (Senter && Sexit) { |
ffa58356 | 696 | tputs (Senter, 1, putch); |
2c880657 JK |
697 | promptlen += (2 * soglitch); |
698 | } | |
35bd36fc BJ |
699 | if (clreol) |
700 | cleareol (); | |
ffa58356 ES |
701 | pr("--More--"); |
702 | if (filename != NULL) { | |
703 | promptlen += printf ("(Next file: %s)", filename); | |
704 | } | |
705 | else if (!no_intty) { | |
706 | promptlen += printf ("(%d%%)", (int)((file_pos * 100) / file_size)); | |
707 | } | |
708 | if (dum_opt) { | |
2c880657 | 709 | promptlen += pr("[Press space to continue, 'q' to quit.]"); |
ffa58356 ES |
710 | } |
711 | if (Senter && Sexit) | |
712 | tputs (Sexit, 1, putch); | |
35bd36fc BJ |
713 | if (clreol) |
714 | clreos (); | |
ffa58356 ES |
715 | fflush(stdout); |
716 | } | |
717 | else | |
718 | write (2, &bell, 1); | |
719 | inwait++; | |
720 | } | |
721 | ||
722 | /* | |
723 | ** Get a logical line | |
724 | */ | |
725 | ||
726 | getline(f, length) | |
727 | register FILE *f; | |
728 | int *length; | |
729 | { | |
730 | register int c; | |
731 | register char *p; | |
732 | register int column; | |
733 | static int colflg; | |
734 | ||
735 | p = Line; | |
736 | column = 0; | |
737 | c = Getc (f); | |
738 | if (colflg && c == '\n') { | |
739 | Currline++; | |
740 | c = Getc (f); | |
741 | } | |
742 | while (p < &Line[LINSIZ - 1]) { | |
743 | if (c == EOF) { | |
744 | if (p > Line) { | |
745 | *p = '\0'; | |
746 | *length = p - Line; | |
747 | return (column); | |
748 | } | |
749 | *length = p - Line; | |
750 | return (EOF); | |
751 | } | |
752 | if (c == '\n') { | |
753 | Currline++; | |
754 | break; | |
755 | } | |
756 | *p++ = c; | |
757 | if (c == '\t') | |
76dbb69b EW |
758 | if (!hardtabs || column < promptlen && !hard) { |
759 | if (hardtabs && eraseln && !dumb) { | |
ffa58356 ES |
760 | column = 1 + (column | 7); |
761 | tputs (eraseln, 1, putch); | |
762 | promptlen = 0; | |
763 | } | |
764 | else { | |
76dbb69b | 765 | for (--p; p < &Line[LINSIZ - 1];) { |
ffa58356 | 766 | *p++ = ' '; |
76dbb69b EW |
767 | if ((++column & 7) == 0) |
768 | break; | |
ffa58356 ES |
769 | } |
770 | if (column >= promptlen) promptlen = 0; | |
771 | } | |
772 | } | |
773 | else | |
774 | column = 1 + (column | 7); | |
d1b174c2 | 775 | else if (c == '\b' && column > 0) |
ffa58356 ES |
776 | column--; |
777 | else if (c == '\r') | |
778 | column = 0; | |
779 | else if (c == '\f' && stop_opt) { | |
780 | p[-1] = '^'; | |
781 | *p++ = 'L'; | |
782 | column += 2; | |
783 | Pause++; | |
784 | } | |
785 | else if (c == EOF) { | |
786 | *length = p - Line; | |
787 | return (column); | |
788 | } | |
789 | else if (c >= ' ' && c != RUBOUT) | |
790 | column++; | |
791 | if (column >= Mcol && fold_opt) break; | |
792 | c = Getc (f); | |
793 | } | |
794 | if (column >= Mcol && Mcol > 0) { | |
795 | if (!Wrap) { | |
796 | *p++ = '\n'; | |
797 | } | |
798 | } | |
799 | colflg = column == Mcol && fold_opt; | |
06e20570 JB |
800 | if (colflg && eatnl && Wrap) { |
801 | *p++ = '\n'; /* simulate normal wrap */ | |
802 | } | |
ffa58356 ES |
803 | *length = p - Line; |
804 | *p = 0; | |
805 | return (column); | |
806 | } | |
807 | ||
808 | /* | |
809 | ** Erase the rest of the prompt, assuming we are starting at column col. | |
810 | */ | |
811 | ||
812 | erase (col) | |
813 | register int col; | |
814 | { | |
815 | ||
816 | if (promptlen == 0) | |
817 | return; | |
818 | if (hard) { | |
819 | putchar ('\n'); | |
820 | } | |
821 | else { | |
822 | if (col == 0) | |
823 | putchar ('\r'); | |
824 | if (!dumb && eraseln) | |
825 | tputs (eraseln, 1, putch); | |
826 | else | |
827 | for (col = promptlen - col; col > 0; col--) | |
828 | putchar (' '); | |
829 | } | |
830 | promptlen = 0; | |
831 | } | |
832 | ||
833 | /* | |
834 | ** Erase the current line entirely | |
835 | */ | |
836 | ||
837 | kill_line () | |
838 | { | |
839 | erase (0); | |
840 | if (!eraseln || dumb) putchar ('\r'); | |
841 | } | |
842 | ||
38ccf597 BJ |
843 | /* |
844 | * force clear to end of line | |
845 | */ | |
846 | cleareol() | |
847 | { | |
35bd36fc | 848 | tputs(eraseln, 1, putch); |
38ccf597 BJ |
849 | } |
850 | ||
35bd36fc | 851 | clreos() |
38ccf597 | 852 | { |
35bd36fc | 853 | tputs(EodClr, 1, putch); |
38ccf597 BJ |
854 | } |
855 | ||
ffa58356 ES |
856 | /* |
857 | ** Print string and return number of characters | |
858 | */ | |
859 | ||
860 | pr(s1) | |
861 | char *s1; | |
862 | { | |
863 | register char *s; | |
864 | register char c; | |
865 | ||
866 | for (s = s1; c = *s++; ) | |
867 | putchar(c); | |
868 | return (s - s1 - 1); | |
869 | } | |
870 | ||
871 | ||
872 | /* Print a buffer of n characters */ | |
873 | ||
874 | prbuf (s, n) | |
875 | register char *s; | |
876 | register int n; | |
877 | { | |
2c880657 | 878 | register char c; /* next output character */ |
35bd36fc | 879 | register int state; /* next output char's UL state */ |
2c880657 | 880 | #define wouldul(s,n) ((n) >= 2 && (((s)[0] == '_' && (s)[1] == '\b') || ((s)[1] == '\b' && (s)[2] == '_'))) |
35bd36fc BJ |
881 | |
882 | while (--n >= 0) | |
883 | if (!ul_opt) | |
884 | putchar (*s++); | |
885 | else { | |
2c880657 JK |
886 | if (*s == ' ' && pstate == 0 && ulglitch && wouldul(s+1, n-1)) { |
887 | s++; | |
888 | continue; | |
889 | } | |
890 | if (state = wouldul(s, n)) { | |
891 | c = (*s == '_')? s[2] : *s ; | |
35bd36fc | 892 | n -= 2; |
2c880657 JK |
893 | s += 3; |
894 | } else | |
35bd36fc | 895 | c = *s++; |
2c880657 JK |
896 | if (state != pstate) { |
897 | if (c == ' ' && state == 0 && ulglitch && wouldul(s, n-1)) | |
898 | state = 1; | |
899 | else | |
900 | tputs(state ? ULenter : ULexit, 1, putch); | |
35bd36fc | 901 | } |
2c880657 JK |
902 | if (c != ' ' || pstate == 0 || state != 0 || ulglitch == 0) |
903 | putchar(c); | |
35bd36fc BJ |
904 | if (state && *chUL) { |
905 | pr(chBS); | |
906 | tputs(chUL, 1, putch); | |
907 | } | |
2c880657 | 908 | pstate = state; |
35bd36fc | 909 | } |
ffa58356 ES |
910 | } |
911 | ||
912 | /* | |
913 | ** Clear the screen | |
914 | */ | |
915 | ||
916 | doclear() | |
917 | { | |
918 | if (Clear && !hard) { | |
919 | tputs(Clear, 1, putch); | |
920 | ||
921 | /* Put out carriage return so that system doesn't | |
922 | ** get confused by escape sequences when expanding tabs | |
923 | */ | |
924 | putchar ('\r'); | |
925 | promptlen = 0; | |
926 | } | |
927 | } | |
928 | ||
38ccf597 BJ |
929 | /* |
930 | * Go to home position | |
931 | */ | |
932 | home() | |
933 | { | |
934 | tputs(Home,1,putch); | |
935 | } | |
936 | ||
ffa58356 ES |
937 | static int lastcmd, lastarg, lastp; |
938 | static int lastcolon; | |
939 | char shell_line[132]; | |
940 | ||
941 | /* | |
942 | ** Read a command and do it. A command consists of an optional integer | |
943 | ** argument followed by the command character. Return the number of lines | |
944 | ** to display in the next screenful. If there is nothing more to display | |
945 | ** in the current file, zero is returned. | |
946 | */ | |
947 | ||
948 | command (filename, f) | |
949 | char *filename; | |
950 | register FILE *f; | |
951 | { | |
952 | register int nlines; | |
953 | register int retval; | |
954 | register char c; | |
955 | char colonch; | |
956 | FILE *helpf; | |
957 | int done; | |
958 | char comchar, cmdbuf[80], *p; | |
959 | ||
960 | #define ret(val) retval=val;done++;break | |
961 | ||
962 | done = 0; | |
963 | if (!errors) | |
964 | prompt (filename); | |
965 | else | |
966 | errors = 0; | |
967 | if (MBIT == RAW && slow_tty) { | |
968 | otty.sg_flags |= MBIT; | |
d730d1dc | 969 | stty(fileno(stderr), &otty); |
ffa58356 ES |
970 | } |
971 | for (;;) { | |
972 | nlines = number (&comchar); | |
973 | lastp = colonch = 0; | |
974 | if (comchar == '.') { /* Repeat last command */ | |
975 | lastp++; | |
976 | comchar = lastcmd; | |
977 | nlines = lastarg; | |
978 | if (lastcmd == ':') | |
979 | colonch = lastcolon; | |
980 | } | |
981 | lastcmd = comchar; | |
982 | lastarg = nlines; | |
983 | if (comchar == otty.sg_erase) { | |
984 | kill_line (); | |
985 | prompt (filename); | |
986 | continue; | |
987 | } | |
988 | switch (comchar) { | |
989 | case ':': | |
990 | retval = colon (filename, colonch, nlines); | |
991 | if (retval >= 0) | |
992 | done++; | |
993 | break; | |
4d242f02 JB |
994 | case 'b': |
995 | case ctrl(B): | |
996 | { | |
997 | register int initline; | |
998 | ||
999 | if (no_intty) { | |
1000 | write(2, &bell, 1); | |
1001 | return (-1); | |
1002 | } | |
1003 | ||
1004 | if (nlines == 0) nlines++; | |
1005 | ||
1006 | putchar ('\r'); | |
1007 | erase (0); | |
1008 | printf ("\n"); | |
1009 | if (clreol) | |
1010 | cleareol (); | |
1011 | printf ("...back %d page", nlines); | |
1012 | if (nlines > 1) | |
1013 | pr ("s\n"); | |
1014 | else | |
1015 | pr ("\n"); | |
1016 | ||
1017 | if (clreol) | |
1018 | cleareol (); | |
1019 | pr ("\n"); | |
1020 | ||
1021 | initline = Currline - dlines * (nlines + 1); | |
1022 | if (! noscroll) | |
1023 | --initline; | |
1024 | if (initline < 0) initline = 0; | |
1025 | Fseek(f, 0L); | |
1026 | Currline = 0; /* skiplns() will make Currline correct */ | |
1027 | skiplns(initline, f); | |
1028 | if (! noscroll) { | |
1029 | ret(dlines + 1); | |
1030 | } | |
1031 | else { | |
1032 | ret(dlines); | |
1033 | } | |
1034 | } | |
ffa58356 ES |
1035 | case ' ': |
1036 | case 'z': | |
1037 | if (nlines == 0) nlines = dlines; | |
1038 | else if (comchar == 'z') dlines = nlines; | |
1039 | ret (nlines); | |
1040 | case 'd': | |
1041 | case ctrl(D): | |
1042 | if (nlines != 0) nscroll = nlines; | |
1043 | ret (nscroll); | |
ffa58356 ES |
1044 | case 'q': |
1045 | case 'Q': | |
1046 | end_it (); | |
1047 | case 's': | |
1048 | case 'f': | |
1049 | if (nlines == 0) nlines++; | |
1050 | if (comchar == 'f') | |
1051 | nlines *= dlines; | |
1052 | putchar ('\r'); | |
1053 | erase (0); | |
35bd36fc BJ |
1054 | printf ("\n"); |
1055 | if (clreol) | |
1056 | cleareol (); | |
1057 | printf ("...skipping %d line", nlines); | |
ffa58356 | 1058 | if (nlines > 1) |
35bd36fc | 1059 | pr ("s\n"); |
ffa58356 | 1060 | else |
35bd36fc BJ |
1061 | pr ("\n"); |
1062 | ||
1063 | if (clreol) | |
1064 | cleareol (); | |
1065 | pr ("\n"); | |
1066 | ||
ffa58356 ES |
1067 | while (nlines > 0) { |
1068 | while ((c = Getc (f)) != '\n') | |
1069 | if (c == EOF) { | |
1070 | retval = 0; | |
1071 | done++; | |
1072 | goto endsw; | |
1073 | } | |
1074 | Currline++; | |
1075 | nlines--; | |
1076 | } | |
1077 | ret (dlines); | |
1078 | case '\n': | |
1079 | if (nlines != 0) | |
1080 | dlines = nlines; | |
1081 | else | |
1082 | nlines = 1; | |
1083 | ret (nlines); | |
1084 | case '\f': | |
1085 | if (!no_intty) { | |
1086 | doclear (); | |
1087 | Fseek (f, screen_start.chrctr); | |
1088 | Currline = screen_start.line; | |
1089 | ret (dlines); | |
1090 | } | |
1091 | else { | |
1092 | write (2, &bell, 1); | |
1093 | break; | |
1094 | } | |
1095 | case '\'': | |
1096 | if (!no_intty) { | |
1097 | kill_line (); | |
1098 | pr ("\n***Back***\n\n"); | |
1099 | Fseek (f, context.chrctr); | |
1100 | Currline = context.line; | |
1101 | ret (dlines); | |
1102 | } | |
1103 | else { | |
1104 | write (2, &bell, 1); | |
1105 | break; | |
1106 | } | |
1107 | case '=': | |
1108 | kill_line (); | |
1109 | promptlen = printd (Currline); | |
1110 | fflush (stdout); | |
1111 | break; | |
1112 | case 'n': | |
1113 | lastp++; | |
1114 | case '/': | |
1115 | if (nlines == 0) nlines++; | |
1116 | kill_line (); | |
1117 | pr ("/"); | |
1118 | promptlen = 1; | |
1119 | fflush (stdout); | |
1120 | if (lastp) { | |
1121 | write (2,"\r", 1); | |
1122 | search (NULL, f, nlines); /* Use previous r.e. */ | |
1123 | } | |
1124 | else { | |
1125 | ttyin (cmdbuf, 78, '/'); | |
1126 | write (2, "\r", 1); | |
1127 | search (cmdbuf, f, nlines); | |
1128 | } | |
38ccf597 | 1129 | ret (dlines-1); |
ffa58356 ES |
1130 | case '!': |
1131 | do_shell (filename); | |
1132 | break; | |
4d242f02 | 1133 | case '?': |
ffa58356 ES |
1134 | case 'h': |
1135 | if ((helpf = fopen (HELPFILE, "r")) == NULL) | |
1136 | error ("Can't open help file"); | |
1137 | if (noscroll) doclear (); | |
1138 | copy_file (helpf); | |
f27fb120 | 1139 | fclose (helpf); |
ffa58356 ES |
1140 | prompt (filename); |
1141 | break; | |
1142 | case 'v': /* This case should go right before default */ | |
1143 | if (!no_intty) { | |
1144 | kill_line (); | |
1145 | cmdbuf[0] = '+'; | |
4d242f02 JB |
1146 | scanstr (Currline - dlines < 0 ? 0 |
1147 | : Currline - (dlines + 1) / 2, &cmdbuf[1]); | |
ffa58356 ES |
1148 | pr ("vi "); pr (cmdbuf); putchar (' '); pr (fnames[fnum]); |
1149 | execute (filename, VI, "vi", cmdbuf, fnames[fnum], 0); | |
1150 | break; | |
1151 | } | |
1152 | default: | |
2c880657 JK |
1153 | if (dum_opt) { |
1154 | kill_line (); | |
1155 | if (Senter && Sexit) { | |
1156 | tputs (Senter, 1, putch); | |
1157 | promptlen = pr ("[Press 'h' for instructions.]") + (2 * soglitch); | |
1158 | tputs (Sexit, 1, putch); | |
1159 | } | |
1160 | else | |
1161 | promptlen = pr ("[Press 'h' for instructions.]"); | |
1162 | fflush (stdout); | |
1163 | } | |
1164 | else | |
1165 | write (2, &bell, 1); | |
ffa58356 ES |
1166 | break; |
1167 | } | |
1168 | if (done) break; | |
1169 | } | |
1170 | putchar ('\r'); | |
1171 | endsw: | |
1172 | inwait = 0; | |
1173 | notell++; | |
1174 | if (MBIT == RAW && slow_tty) { | |
1175 | otty.sg_flags &= ~MBIT; | |
d730d1dc | 1176 | stty(fileno(stderr), &otty); |
ffa58356 ES |
1177 | } |
1178 | return (retval); | |
1179 | } | |
1180 | ||
1181 | char ch; | |
1182 | ||
1183 | /* | |
1184 | * Execute a colon-prefixed command. | |
1185 | * Returns <0 if not a command that should cause | |
1186 | * more of the file to be printed. | |
1187 | */ | |
1188 | ||
1189 | colon (filename, cmd, nlines) | |
1190 | char *filename; | |
1191 | int cmd; | |
1192 | int nlines; | |
1193 | { | |
1194 | if (cmd == 0) | |
1195 | ch = readch (); | |
1196 | else | |
1197 | ch = cmd; | |
1198 | lastcolon = ch; | |
1199 | switch (ch) { | |
1200 | case 'f': | |
1201 | kill_line (); | |
1202 | if (!no_intty) | |
1203 | promptlen = printf ("\"%s\" line %d", fnames[fnum], Currline); | |
1204 | else | |
1205 | promptlen = printf ("[Not a file] line %d", Currline); | |
1206 | fflush (stdout); | |
1207 | return (-1); | |
1208 | case 'n': | |
1209 | if (nlines == 0) { | |
1210 | if (fnum >= nfiles - 1) | |
1211 | end_it (); | |
1212 | nlines++; | |
1213 | } | |
1214 | putchar ('\r'); | |
1215 | erase (0); | |
1216 | skipf (nlines); | |
1217 | return (0); | |
1218 | case 'p': | |
1219 | if (no_intty) { | |
1220 | write (2, &bell, 1); | |
1221 | return (-1); | |
1222 | } | |
1223 | putchar ('\r'); | |
1224 | erase (0); | |
1225 | if (nlines == 0) | |
1226 | nlines++; | |
1227 | skipf (-nlines); | |
1228 | return (0); | |
1229 | case '!': | |
1230 | do_shell (filename); | |
1231 | return (-1); | |
1232 | case 'q': | |
1233 | case 'Q': | |
1234 | end_it (); | |
1235 | default: | |
1236 | write (2, &bell, 1); | |
1237 | return (-1); | |
1238 | } | |
1239 | } | |
1240 | ||
1241 | /* | |
1242 | ** Read a decimal number from the terminal. Set cmd to the non-digit which | |
1243 | ** terminates the number. | |
1244 | */ | |
1245 | ||
1246 | number(cmd) | |
1247 | char *cmd; | |
1248 | { | |
1249 | register int i; | |
1250 | ||
1251 | i = 0; ch = otty.sg_kill; | |
1252 | for (;;) { | |
1253 | ch = readch (); | |
1254 | if (ch >= '0' && ch <= '9') | |
1255 | i = i*10 + ch - '0'; | |
1256 | else if (ch == otty.sg_kill) | |
1257 | i = 0; | |
1258 | else { | |
1259 | *cmd = ch; | |
1260 | break; | |
1261 | } | |
1262 | } | |
1263 | return (i); | |
1264 | } | |
1265 | ||
1266 | do_shell (filename) | |
1267 | char *filename; | |
1268 | { | |
1269 | char cmdbuf[80]; | |
1270 | ||
1271 | kill_line (); | |
1272 | pr ("!"); | |
1273 | fflush (stdout); | |
1274 | promptlen = 1; | |
1275 | if (lastp) | |
1276 | pr (shell_line); | |
1277 | else { | |
1278 | ttyin (cmdbuf, 78, '!'); | |
1279 | if (expand (shell_line, cmdbuf)) { | |
1280 | kill_line (); | |
1281 | promptlen = printf ("!%s", shell_line); | |
1282 | } | |
1283 | } | |
1284 | fflush (stdout); | |
1285 | write (2, "\n", 1); | |
1286 | promptlen = 0; | |
1287 | shellp = 1; | |
1288 | execute (filename, shell, shell, "-c", shell_line, 0); | |
1289 | } | |
1290 | ||
1291 | /* | |
1292 | ** Search for nth ocurrence of regular expression contained in buf in the file | |
1293 | */ | |
1294 | ||
1295 | search (buf, file, n) | |
1296 | char buf[]; | |
1297 | FILE *file; | |
1298 | register int n; | |
1299 | { | |
1300 | long startline = Ftell (file); | |
1301 | register long line1 = startline; | |
1302 | register long line2 = startline; | |
1303 | register long line3 = startline; | |
1304 | register int lncount; | |
1305 | int saveln, rv, re_exec(); | |
1306 | char *s, *re_comp(); | |
1307 | ||
1308 | context.line = saveln = Currline; | |
1309 | context.chrctr = startline; | |
1310 | lncount = 0; | |
1311 | if ((s = re_comp (buf)) != 0) | |
1312 | error (s); | |
1313 | while (!feof (file)) { | |
1314 | line3 = line2; | |
1315 | line2 = line1; | |
1316 | line1 = Ftell (file); | |
1317 | rdline (file); | |
1318 | lncount++; | |
1319 | if ((rv = re_exec (Line)) == 1) | |
1320 | if (--n == 0) { | |
1321 | if (lncount > 3 || (lncount > 1 && no_intty)) | |
38ccf597 BJ |
1322 | { |
1323 | pr ("\n"); | |
35bd36fc BJ |
1324 | if (clreol) |
1325 | cleareol (); | |
38ccf597 BJ |
1326 | pr("...skipping\n"); |
1327 | } | |
ffa58356 ES |
1328 | if (!no_intty) { |
1329 | Currline -= (lncount >= 3 ? 3 : lncount); | |
1330 | Fseek (file, line3); | |
35bd36fc BJ |
1331 | if (noscroll) |
1332 | if (clreol) { | |
1333 | home (); | |
1334 | cleareol (); | |
d730d1dc | 1335 | } |
35bd36fc BJ |
1336 | else |
1337 | doclear (); | |
ffa58356 ES |
1338 | } |
1339 | else { | |
1340 | kill_line (); | |
35bd36fc BJ |
1341 | if (noscroll) |
1342 | if (clreol) { | |
d730d1dc | 1343 | home (); |
35bd36fc | 1344 | cleareol (); |
d730d1dc | 1345 | } |
35bd36fc BJ |
1346 | else |
1347 | doclear (); | |
ffa58356 ES |
1348 | pr (Line); |
1349 | putchar ('\n'); | |
1350 | } | |
1351 | break; | |
1352 | } | |
1353 | else if (rv == -1) | |
1354 | error ("Regular expression botch"); | |
1355 | } | |
1356 | if (feof (file)) { | |
1357 | if (!no_intty) { | |
ffa58356 | 1358 | file->_flag &= ~_IOEOF; /* why doesn't fseek do this ??!!??! */ |
ffa58356 ES |
1359 | Currline = saveln; |
1360 | Fseek (file, startline); | |
1361 | } | |
1362 | else { | |
1363 | pr ("\nPattern not found\n"); | |
1364 | end_it (); | |
1365 | } | |
1366 | error ("Pattern not found"); | |
1367 | } | |
1368 | } | |
1369 | ||
9b2b5ff7 KB |
1370 | /*VARARGS2*/ |
1371 | execute (filename, cmd, va_alist) | |
ffa58356 | 1372 | char *filename; |
9b2b5ff7 KB |
1373 | char *cmd; |
1374 | va_dcl | |
ffa58356 ES |
1375 | { |
1376 | int id; | |
2c880657 | 1377 | int n; |
9b2b5ff7 | 1378 | va_list argp; |
ffa58356 ES |
1379 | |
1380 | fflush (stdout); | |
1381 | reset_tty (); | |
2c880657 | 1382 | for (n = 10; (id = fork ()) < 0 && n > 0; n--) |
ffa58356 ES |
1383 | sleep (5); |
1384 | if (id == 0) { | |
2c880657 JK |
1385 | if (!isatty(0)) { |
1386 | close(0); | |
1387 | open("/dev/tty", 0); | |
1388 | } | |
9b2b5ff7 KB |
1389 | va_start(argp); |
1390 | execv (cmd, argp); | |
ffa58356 ES |
1391 | write (2, "exec failed\n", 12); |
1392 | exit (1); | |
1393 | } | |
2c880657 JK |
1394 | if (id > 0) { |
1395 | signal (SIGINT, SIG_IGN); | |
1396 | signal (SIGQUIT, SIG_IGN); | |
1397 | if (catch_susp) | |
1398 | signal(SIGTSTP, SIG_DFL); | |
1399 | while (wait(0) > 0); | |
1400 | signal (SIGINT, end_it); | |
1401 | signal (SIGQUIT, onquit); | |
1402 | if (catch_susp) | |
1403 | signal(SIGTSTP, onsusp); | |
1404 | } else | |
1405 | write(2, "can't fork\n", 11); | |
ffa58356 ES |
1406 | set_tty (); |
1407 | pr ("------------------------\n"); | |
1408 | prompt (filename); | |
1409 | } | |
1410 | /* | |
1411 | ** Skip n lines in the file f | |
1412 | */ | |
1413 | ||
1414 | skiplns (n, f) | |
1415 | register int n; | |
1416 | register FILE *f; | |
1417 | { | |
1418 | register char c; | |
1419 | ||
1420 | while (n > 0) { | |
1421 | while ((c = Getc (f)) != '\n') | |
1422 | if (c == EOF) | |
1423 | return; | |
1424 | n--; | |
1425 | Currline++; | |
1426 | } | |
1427 | } | |
1428 | ||
1429 | /* | |
1430 | ** Skip nskip files in the file list (from the command line). Nskip may be | |
1431 | ** negative. | |
1432 | */ | |
1433 | ||
1434 | skipf (nskip) | |
1435 | register int nskip; | |
1436 | { | |
1437 | if (nskip == 0) return; | |
1438 | if (nskip > 0) { | |
1439 | if (fnum + nskip > nfiles - 1) | |
1440 | nskip = nfiles - fnum - 1; | |
1441 | } | |
1442 | else if (within) | |
1443 | ++fnum; | |
1444 | fnum += nskip; | |
1445 | if (fnum < 0) | |
1446 | fnum = 0; | |
35bd36fc | 1447 | pr ("\n...Skipping "); |
38ccf597 | 1448 | pr ("\n"); |
35bd36fc BJ |
1449 | if (clreol) |
1450 | cleareol (); | |
38ccf597 | 1451 | pr ("...Skipping "); |
ffa58356 ES |
1452 | pr (nskip > 0 ? "to file " : "back to file "); |
1453 | pr (fnames[fnum]); | |
38ccf597 | 1454 | pr ("\n"); |
35bd36fc BJ |
1455 | if (clreol) |
1456 | cleareol (); | |
38ccf597 | 1457 | pr ("\n"); |
ffa58356 ES |
1458 | --fnum; |
1459 | } | |
1460 | ||
1461 | /*----------------------------- Terminal I/O -------------------------------*/ | |
1462 | ||
1463 | initterm () | |
1464 | { | |
1465 | char buf[TBUFSIZ]; | |
8cb6d801 | 1466 | static char clearbuf[TBUFSIZ]; |
ffa58356 | 1467 | char *clearptr, *padstr; |
ffa58356 | 1468 | int ldisc; |
4a56d647 | 1469 | int lmode; |
54decef9 | 1470 | char *term; |
d730d1dc | 1471 | int tgrp; |
d3e7b534 | 1472 | struct winsize win; |
ffa58356 | 1473 | |
d730d1dc CL |
1474 | retry: |
1475 | if (!(no_tty = gtty(fileno(stdout), &otty))) { | |
4a56d647 CL |
1476 | if (ioctl(fileno(stdout), TIOCLGET, &lmode) < 0) { |
1477 | perror("TIOCLGET"); | |
1478 | exit(1); | |
1479 | } | |
1480 | docrterase = ((lmode & LCRTERA) != 0); | |
1481 | docrtkill = ((lmode & LCRTKIL) != 0); | |
d730d1dc | 1482 | /* |
4a56d647 CL |
1483 | * Wait until we're in the foreground before we save the |
1484 | * the terminal modes. | |
d730d1dc CL |
1485 | */ |
1486 | if (ioctl(fileno(stdout), TIOCGPGRP, &tgrp) < 0) { | |
4a56d647 | 1487 | perror("TIOCGPGRP"); |
d730d1dc CL |
1488 | exit(1); |
1489 | } | |
1490 | if (tgrp != getpgrp(0)) { | |
1491 | kill(0, SIGTTOU); | |
1492 | goto retry; | |
1493 | } | |
8828eef4 | 1494 | if ((term = getenv("TERM")) == 0 || tgetent(buf, term) <= 0) { |
35bd36fc | 1495 | dumb++; ul_opt = 0; |
ffa58356 ES |
1496 | } |
1497 | else { | |
d3e7b534 JB |
1498 | if (ioctl(fileno(stdout), TIOCGWINSZ, &win) < 0) { |
1499 | Lpp = tgetnum("li"); | |
1500 | Mcol = tgetnum("co"); | |
1501 | } else { | |
1502 | if ((Lpp = win.ws_row) == 0) | |
1503 | Lpp = tgetnum("li"); | |
1504 | if ((Mcol = win.ws_col) == 0) | |
1505 | Mcol = tgetnum("co"); | |
1506 | } | |
1507 | if ((Lpp <= 0) || tgetflag("hc")) { | |
ffa58356 ES |
1508 | hard++; /* Hard copy terminal */ |
1509 | Lpp = 24; | |
1510 | } | |
06e20570 JB |
1511 | if (tgetflag("xn")) |
1512 | eatnl++; /* Eat newline at last column + 1; dec, concept */ | |
d3e7b534 JB |
1513 | if (Mcol <= 0) |
1514 | Mcol = 80; | |
1515 | ||
ffa58356 ES |
1516 | if (tailequ (fnames[0], "page") || !hard && tgetflag("ns")) |
1517 | noscroll++; | |
ffa58356 ES |
1518 | Wrap = tgetflag("am"); |
1519 | bad_so = tgetflag ("xs"); | |
1520 | clearptr = clearbuf; | |
1521 | eraseln = tgetstr("ce",&clearptr); | |
1522 | Clear = tgetstr("cl", &clearptr); | |
1523 | Senter = tgetstr("so", &clearptr); | |
1524 | Sexit = tgetstr("se", &clearptr); | |
2c880657 JK |
1525 | if ((soglitch = tgetnum("sg")) < 0) |
1526 | soglitch = 0; | |
35bd36fc BJ |
1527 | |
1528 | /* | |
1529 | * Set up for underlining: some terminals don't need it; | |
1530 | * others have start/stop sequences, still others have an | |
1531 | * underline char sequence which is assumed to move the | |
1532 | * cursor forward one character. If underline sequence | |
1533 | * isn't available, settle for standout sequence. | |
1534 | */ | |
1535 | ||
1536 | if (tgetflag("ul") || tgetflag("os")) | |
1537 | ul_opt = 0; | |
1538 | if ((chUL = tgetstr("uc", &clearptr)) == NULL ) | |
1539 | chUL = ""; | |
2c880657 JK |
1540 | if (((ULenter = tgetstr("us", &clearptr)) == NULL || |
1541 | (ULexit = tgetstr("ue", &clearptr)) == NULL) && !*chUL) { | |
1542 | if ((ULenter = Senter) == NULL || (ULexit = Sexit) == NULL) { | |
1543 | ULenter = ""; | |
1544 | ULexit = ""; | |
1545 | } else | |
1546 | ulglitch = soglitch; | |
1547 | } else { | |
1548 | if ((ulglitch = tgetnum("ug")) < 0) | |
1549 | ulglitch = 0; | |
1550 | } | |
d730d1dc | 1551 | |
ffa58356 ES |
1552 | if (padstr = tgetstr("pc", &clearptr)) |
1553 | PC = *padstr; | |
38ccf597 | 1554 | Home = tgetstr("ho",&clearptr); |
ddbe1116 | 1555 | if (Home == 0 || *Home == '\0') |
38ccf597 | 1556 | { |
35bd36fc BJ |
1557 | if ((cursorm = tgetstr("cm", &clearptr)) != NULL) { |
1558 | strcpy(cursorhome, tgoto(cursorm, 0, 0)); | |
38ccf597 BJ |
1559 | Home = cursorhome; |
1560 | } | |
1561 | } | |
35bd36fc | 1562 | EodClr = tgetstr("cd", &clearptr); |
7d256058 KM |
1563 | if ((chBS = tgetstr("bc", &clearptr)) == NULL) |
1564 | chBS = "\b"; | |
1565 | ||
ffa58356 ES |
1566 | } |
1567 | if ((shell = getenv("SHELL")) == NULL) | |
1568 | shell = "/bin/sh"; | |
1569 | } | |
d730d1dc CL |
1570 | no_intty = gtty(fileno(stdin), &otty); |
1571 | gtty(fileno(stderr), &otty); | |
8828eef4 | 1572 | savetty = otty; |
ffa58356 ES |
1573 | ospeed = otty.sg_ospeed; |
1574 | slow_tty = ospeed < B1200; | |
f27fb120 | 1575 | hardtabs = (otty.sg_flags & TBDELAY) != XTABS; |
ffa58356 ES |
1576 | if (!no_tty) { |
1577 | otty.sg_flags &= ~ECHO; | |
1578 | if (MBIT == CBREAK || !slow_tty) | |
1579 | otty.sg_flags |= MBIT; | |
1580 | } | |
1581 | } | |
1582 | ||
1583 | readch () | |
1584 | { | |
1585 | char ch; | |
1586 | extern int errno; | |
1587 | ||
06b4bd81 | 1588 | errno = 0; |
ffa58356 ES |
1589 | if (read (2, &ch, 1) <= 0) |
1590 | if (errno != EINTR) | |
06b4bd81 | 1591 | end_it(); |
ffa58356 ES |
1592 | else |
1593 | ch = otty.sg_kill; | |
1594 | return (ch); | |
1595 | } | |
1596 | ||
1597 | static char BS = '\b'; | |
4a56d647 | 1598 | static char *BSB = "\b \b"; |
ffa58356 | 1599 | static char CARAT = '^'; |
4a56d647 CL |
1600 | #define ERASEONECHAR \ |
1601 | if (docrterase) \ | |
1602 | write (2, BSB, sizeof(BSB)); \ | |
1603 | else \ | |
1604 | write (2, &BS, sizeof(BS)); | |
ffa58356 ES |
1605 | |
1606 | ttyin (buf, nmax, pchar) | |
1607 | char buf[]; | |
1608 | register int nmax; | |
1609 | char pchar; | |
1610 | { | |
1611 | register char *sptr; | |
1612 | register char ch; | |
1613 | register int slash = 0; | |
1614 | int maxlen; | |
1615 | char cbuf; | |
1616 | ||
1617 | sptr = buf; | |
1618 | maxlen = 0; | |
1619 | while (sptr - buf < nmax) { | |
1620 | if (promptlen > maxlen) maxlen = promptlen; | |
1621 | ch = readch (); | |
1622 | if (ch == '\\') { | |
1623 | slash++; | |
1624 | } | |
1625 | else if ((ch == otty.sg_erase) && !slash) { | |
1626 | if (sptr > buf) { | |
1627 | --promptlen; | |
4a56d647 | 1628 | ERASEONECHAR |
ffa58356 ES |
1629 | --sptr; |
1630 | if ((*sptr < ' ' && *sptr != '\n') || *sptr == RUBOUT) { | |
1631 | --promptlen; | |
4a56d647 | 1632 | ERASEONECHAR |
ffa58356 ES |
1633 | } |
1634 | continue; | |
1635 | } | |
1636 | else { | |
1637 | if (!eraseln) promptlen = maxlen; | |
1638 | longjmp (restore, 1); | |
1639 | } | |
1640 | } | |
1641 | else if ((ch == otty.sg_kill) && !slash) { | |
1642 | if (hard) { | |
1643 | show (ch); | |
1644 | putchar ('\n'); | |
1645 | putchar (pchar); | |
1646 | } | |
1647 | else { | |
1648 | putchar ('\r'); | |
1649 | putchar (pchar); | |
1650 | if (eraseln) | |
1651 | erase (1); | |
4a56d647 CL |
1652 | else if (docrtkill) |
1653 | while (promptlen-- > 1) | |
1654 | write (2, BSB, sizeof(BSB)); | |
ffa58356 ES |
1655 | promptlen = 1; |
1656 | } | |
1657 | sptr = buf; | |
1658 | fflush (stdout); | |
1659 | continue; | |
1660 | } | |
1661 | if (slash && (ch == otty.sg_kill || ch == otty.sg_erase)) { | |
4a56d647 | 1662 | ERASEONECHAR |
ffa58356 ES |
1663 | --sptr; |
1664 | } | |
1665 | if (ch != '\\') | |
1666 | slash = 0; | |
1667 | *sptr++ = ch; | |
1668 | if ((ch < ' ' && ch != '\n' && ch != ESC) || ch == RUBOUT) { | |
1669 | ch += ch == RUBOUT ? -0100 : 0100; | |
1670 | write (2, &CARAT, 1); | |
1671 | promptlen++; | |
1672 | } | |
1673 | cbuf = ch; | |
1674 | if (ch != '\n' && ch != ESC) { | |
1675 | write (2, &cbuf, 1); | |
1676 | promptlen++; | |
1677 | } | |
1678 | else | |
1679 | break; | |
1680 | } | |
1681 | *--sptr = '\0'; | |
1682 | if (!eraseln) promptlen = maxlen; | |
1683 | if (sptr - buf >= nmax - 1) | |
1684 | error ("Line too long"); | |
1685 | } | |
1686 | ||
1687 | expand (outbuf, inbuf) | |
1688 | char *outbuf; | |
1689 | char *inbuf; | |
1690 | { | |
1691 | register char *instr; | |
1692 | register char *outstr; | |
1693 | register char ch; | |
1694 | char temp[200]; | |
1695 | int changed = 0; | |
1696 | ||
1697 | instr = inbuf; | |
1698 | outstr = temp; | |
1699 | while ((ch = *instr++) != '\0') | |
1700 | switch (ch) { | |
1701 | case '%': | |
1702 | if (!no_intty) { | |
1703 | strcpy (outstr, fnames[fnum]); | |
1704 | outstr += strlen (fnames[fnum]); | |
1705 | changed++; | |
1706 | } | |
1707 | else | |
1708 | *outstr++ = ch; | |
1709 | break; | |
1710 | case '!': | |
1711 | if (!shellp) | |
1712 | error ("No previous command to substitute for"); | |
1713 | strcpy (outstr, shell_line); | |
1714 | outstr += strlen (shell_line); | |
1715 | changed++; | |
1716 | break; | |
1717 | case '\\': | |
1718 | if (*instr == '%' || *instr == '!') { | |
1719 | *outstr++ = *instr++; | |
1720 | break; | |
1721 | } | |
1722 | default: | |
1723 | *outstr++ = ch; | |
1724 | } | |
1725 | *outstr++ = '\0'; | |
1726 | strcpy (outbuf, temp); | |
1727 | return (changed); | |
1728 | } | |
1729 | ||
1730 | show (ch) | |
1731 | register char ch; | |
1732 | { | |
1733 | char cbuf; | |
1734 | ||
1735 | if ((ch < ' ' && ch != '\n' && ch != ESC) || ch == RUBOUT) { | |
1736 | ch += ch == RUBOUT ? -0100 : 0100; | |
1737 | write (2, &CARAT, 1); | |
1738 | promptlen++; | |
1739 | } | |
1740 | cbuf = ch; | |
1741 | write (2, &cbuf, 1); | |
1742 | promptlen++; | |
1743 | } | |
1744 | ||
1745 | error (mess) | |
1746 | char *mess; | |
1747 | { | |
35bd36fc BJ |
1748 | if (clreol) |
1749 | cleareol (); | |
1750 | else | |
1751 | kill_line (); | |
ffa58356 ES |
1752 | promptlen += strlen (mess); |
1753 | if (Senter && Sexit) { | |
1754 | tputs (Senter, 1, putch); | |
1755 | pr(mess); | |
1756 | tputs (Sexit, 1, putch); | |
1757 | } | |
1758 | else | |
1759 | pr (mess); | |
1760 | fflush(stdout); | |
1761 | errors++; | |
1762 | longjmp (restore, 1); | |
1763 | } | |
1764 | ||
1765 | ||
1766 | set_tty () | |
1767 | { | |
1768 | otty.sg_flags |= MBIT; | |
1769 | otty.sg_flags &= ~ECHO; | |
d730d1dc | 1770 | stty(fileno(stderr), &otty); |
ffa58356 ES |
1771 | } |
1772 | ||
1773 | reset_tty () | |
1774 | { | |
aeb8f381 KB |
1775 | if (no_tty) |
1776 | return; | |
2c880657 JK |
1777 | if (pstate) { |
1778 | tputs(ULexit, 1, putch); | |
1779 | fflush(stdout); | |
1780 | pstate = 0; | |
1781 | } | |
ffa58356 ES |
1782 | otty.sg_flags |= ECHO; |
1783 | otty.sg_flags &= ~MBIT; | |
d730d1dc | 1784 | stty(fileno(stderr), &savetty); |
ffa58356 ES |
1785 | } |
1786 | ||
1787 | rdline (f) | |
1788 | register FILE *f; | |
1789 | { | |
1790 | register char c; | |
1791 | register char *p; | |
1792 | ||
1793 | p = Line; | |
1794 | while ((c = Getc (f)) != '\n' && c != EOF && p - Line < LINSIZ - 1) | |
1795 | *p++ = c; | |
1796 | if (c == '\n') | |
1797 | Currline++; | |
1798 | *p = '\0'; | |
1799 | } | |
1800 | ||
1801 | /* Come here when we get a suspend signal from the terminal */ | |
1802 | ||
ffa58356 ES |
1803 | onsusp () |
1804 | { | |
910bcc08 MK |
1805 | /* ignore SIGTTOU so we don't get stopped if csh grabs the tty */ |
1806 | signal(SIGTTOU, SIG_IGN); | |
ffa58356 ES |
1807 | reset_tty (); |
1808 | fflush (stdout); | |
910bcc08 | 1809 | signal(SIGTTOU, SIG_DFL); |
ffa58356 | 1810 | /* Send the TSTP signal to suspend our process group */ |
2d4fa3b8 SL |
1811 | signal(SIGTSTP, SIG_DFL); |
1812 | sigsetmask(0); | |
ffa58356 ES |
1813 | kill (0, SIGTSTP); |
1814 | /* Pause for station break */ | |
1815 | ||
1816 | /* We're back */ | |
1817 | signal (SIGTSTP, onsusp); | |
1818 | set_tty (); | |
1819 | if (inwait) | |
1820 | longjmp (restore); | |
1821 | } |