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 |
9271e089 | 20 | static char sccsid[] = "@(#)more.c 5.18 (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 | |
3b6cf210 | 58 | #define ctrl(letter) (letter & 077) |
ffa58356 ES |
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) { | |
9271e089 KB |
182 | char *rindex(); |
183 | ||
184 | p = rindex(argv[0], '/'); | |
185 | fputs("usage: ",stderr); | |
186 | fputs(p ? p + 1 : argv[0],stderr); | |
ffa58356 ES |
187 | fputs(" [-dfln] [+linenum | +/pattern] name1 name2 ...\n",stderr); |
188 | exit(1); | |
189 | } | |
190 | else | |
191 | f = stdin; | |
192 | if (!no_tty) { | |
193 | signal(SIGQUIT, onquit); | |
194 | signal(SIGINT, end_it); | |
f27fb120 | 195 | signal(SIGWINCH, chgwinsz); |
ffa58356 ES |
196 | if (signal (SIGTSTP, SIG_IGN) == SIG_DFL) { |
197 | signal(SIGTSTP, onsusp); | |
198 | catch_susp++; | |
199 | } | |
d730d1dc | 200 | stty (fileno(stderr), &otty); |
ffa58356 ES |
201 | } |
202 | if (no_intty) { | |
203 | if (no_tty) | |
204 | copy_file (stdin); | |
205 | else { | |
206 | if ((ch = Getc (f)) == '\f') | |
35bd36fc | 207 | doclear(); |
ffa58356 ES |
208 | else { |
209 | Ungetc (ch, f); | |
35bd36fc BJ |
210 | if (noscroll && (ch != EOF)) { |
211 | if (clreol) | |
212 | home (); | |
213 | else | |
214 | doclear (); | |
38ccf597 | 215 | } |
ffa58356 ES |
216 | } |
217 | if (srchopt) | |
38ccf597 | 218 | { |
ffa58356 | 219 | search (initbuf, stdin, 1); |
35bd36fc BJ |
220 | if (noscroll) |
221 | left--; | |
38ccf597 | 222 | } |
ffa58356 ES |
223 | else if (initopt) |
224 | skiplns (initline, stdin); | |
225 | screen (stdin, left); | |
226 | } | |
227 | no_intty = 0; | |
228 | prnames++; | |
229 | firstf = 0; | |
230 | } | |
231 | ||
232 | while (fnum < nfiles) { | |
233 | if ((f = checkf (fnames[fnum], &clearit)) != NULL) { | |
234 | context.line = context.chrctr = 0; | |
235 | Currline = 0; | |
236 | if (firstf) setjmp (restore); | |
237 | if (firstf) { | |
238 | firstf = 0; | |
239 | if (srchopt) | |
38ccf597 | 240 | { |
ffa58356 | 241 | search (initbuf, f, 1); |
35bd36fc BJ |
242 | if (noscroll) |
243 | left--; | |
38ccf597 | 244 | } |
ffa58356 ES |
245 | else if (initopt) |
246 | skiplns (initline, f); | |
247 | } | |
248 | else if (fnum < nfiles && !no_tty) { | |
249 | setjmp (restore); | |
250 | left = command (fnames[fnum], f); | |
251 | } | |
252 | if (left != 0) { | |
d093b928 | 253 | if ((noscroll || clearit) && (file_size != LONG_MAX)) |
35bd36fc BJ |
254 | if (clreol) |
255 | home (); | |
256 | else | |
257 | doclear (); | |
ffa58356 ES |
258 | if (prnames) { |
259 | if (bad_so) | |
260 | erase (0); | |
35bd36fc BJ |
261 | if (clreol) |
262 | cleareol (); | |
ffa58356 ES |
263 | pr("::::::::::::::"); |
264 | if (promptlen > 14) | |
265 | erase (14); | |
38ccf597 BJ |
266 | printf ("\n"); |
267 | if(clreol) cleareol(); | |
268 | printf("%s\n", fnames[fnum]); | |
269 | if(clreol) cleareol(); | |
8784a475 | 270 | printf("::::::::::::::\n"); |
ffa58356 ES |
271 | if (left > Lpp - 4) |
272 | left = Lpp - 4; | |
273 | } | |
274 | if (no_tty) | |
275 | copy_file (f); | |
276 | else { | |
277 | within++; | |
278 | screen(f, left); | |
279 | within = 0; | |
280 | } | |
281 | } | |
282 | setjmp (restore); | |
283 | fflush(stdout); | |
284 | fclose(f); | |
285 | screen_start.line = screen_start.chrctr = 0L; | |
286 | context.line = context.chrctr = 0L; | |
287 | } | |
288 | fnum++; | |
289 | firstf = 0; | |
290 | } | |
291 | reset_tty (); | |
292 | exit(0); | |
293 | } | |
294 | ||
38ccf597 BJ |
295 | argscan(s) |
296 | char *s; | |
297 | { | |
6444353d KB |
298 | int seen_num = 0; |
299 | ||
300 | while (*s != '\0') { | |
301 | switch (*s) { | |
718f6e88 KL |
302 | case '0': case '1': case '2': |
303 | case '3': case '4': case '5': | |
304 | case '6': case '7': case '8': | |
305 | case '9': | |
6444353d KB |
306 | if (!seen_num) { |
307 | dlines = 0; | |
308 | seen_num = 1; | |
309 | } | |
718f6e88 KL |
310 | dlines = dlines*10 + *s - '0'; |
311 | break; | |
312 | case 'd': | |
313 | dum_opt = 1; | |
314 | break; | |
315 | case 'l': | |
316 | stop_opt = 0; | |
317 | break; | |
318 | case 'f': | |
319 | fold_opt = 0; | |
320 | break; | |
321 | case 'p': | |
322 | noscroll++; | |
323 | break; | |
324 | case 'c': | |
325 | clreol++; | |
326 | break; | |
327 | case 's': | |
328 | ssp_opt = 1; | |
329 | break; | |
330 | case 'u': | |
331 | ul_opt = 0; | |
332 | break; | |
333 | } | |
6444353d | 334 | s++; |
718f6e88 | 335 | } |
38ccf597 BJ |
336 | } |
337 | ||
338 | ||
ffa58356 ES |
339 | /* |
340 | ** Check whether the file named by fs is an ASCII file which the user may | |
341 | ** access. If it is, return the opened file. Otherwise return NULL. | |
342 | */ | |
343 | ||
344 | FILE * | |
345 | checkf (fs, clearfirst) | |
d093b928 KB |
346 | register char *fs; |
347 | int *clearfirst; | |
ffa58356 | 348 | { |
d093b928 KB |
349 | struct stat stbuf; |
350 | register FILE *f; | |
351 | char c; | |
ffa58356 | 352 | |
d093b928 KB |
353 | if (stat (fs, &stbuf) == -1) { |
354 | (void)fflush(stdout); | |
355 | if (clreol) | |
356 | cleareol (); | |
357 | perror(fs); | |
358 | return((FILE *)NULL); | |
359 | } | |
360 | if ((stbuf.st_mode & S_IFMT) == S_IFDIR) { | |
361 | printf("\n*** %s: directory ***\n\n", fs); | |
362 | return((FILE *)NULL); | |
363 | } | |
364 | if ((f = Fopen(fs, "r")) == NULL) { | |
365 | (void)fflush(stdout); | |
366 | perror(fs); | |
367 | return((FILE *)NULL); | |
368 | } | |
369 | if (magic(f, fs)) | |
370 | return((FILE *)NULL); | |
371 | c = Getc(f); | |
372 | *clearfirst = c == '\f'; | |
ffa58356 | 373 | Ungetc (c, f); |
d093b928 KB |
374 | if ((file_size = stbuf.st_size) == 0) |
375 | file_size = LONG_MAX; | |
376 | return(f); | |
ffa58356 ES |
377 | } |
378 | ||
93b6d4e3 | 379 | /* |
d093b928 KB |
380 | * magic -- |
381 | * check for file magic numbers. This code would best be shared with | |
382 | * the file(1) program or, perhaps, more should not try and be so smart? | |
93b6d4e3 | 383 | */ |
d093b928 KB |
384 | static |
385 | magic(f, fs) | |
386 | FILE *f; | |
387 | char *fs; | |
93b6d4e3 | 388 | { |
d093b928 | 389 | struct exec ex; |
93b6d4e3 | 390 | |
d093b928 KB |
391 | if (fread(&ex, sizeof(ex), 1, f) == 1) |
392 | switch(ex.a_magic) { | |
393 | case OMAGIC: | |
394 | case NMAGIC: | |
395 | case ZMAGIC: | |
396 | case 0405: | |
397 | case 0411: | |
398 | case 0177545: | |
399 | printf("\n******** %s: Not a text file ********\n\n", fs); | |
400 | (void)fclose(f); | |
401 | return(1); | |
402 | } | |
403 | (void)fseek(f, 0L, L_SET); /* rewind() not necessary */ | |
772ccdb7 | 404 | return(0); |
93b6d4e3 KM |
405 | } |
406 | ||
ffa58356 ES |
407 | /* |
408 | ** A real function, for the tputs routine in termlib | |
409 | */ | |
410 | ||
411 | putch (ch) | |
412 | char ch; | |
413 | { | |
414 | putchar (ch); | |
415 | } | |
416 | ||
417 | /* | |
418 | ** Print out the contents of the file f, one screenful at a time. | |
419 | */ | |
420 | ||
421 | #define STOP -10 | |
422 | ||
423 | screen (f, num_lines) | |
424 | register FILE *f; | |
425 | register int num_lines; | |
426 | { | |
427 | register int c; | |
428 | register int nchars; | |
35bd36fc BJ |
429 | int length; /* length of current line */ |
430 | static int prev_len = 1; /* length of previous line */ | |
ffa58356 ES |
431 | |
432 | for (;;) { | |
433 | while (num_lines > 0 && !Pause) { | |
434 | if ((nchars = getline (f, &length)) == EOF) | |
38ccf597 | 435 | { |
35bd36fc BJ |
436 | if (clreol) |
437 | clreos(); | |
ffa58356 | 438 | return; |
38ccf597 | 439 | } |
35bd36fc BJ |
440 | if (ssp_opt && length == 0 && prev_len == 0) |
441 | continue; | |
442 | prev_len = length; | |
ffa58356 ES |
443 | if (bad_so || (Senter && *Senter == ' ') && promptlen > 0) |
444 | erase (0); | |
35bd36fc BJ |
445 | /* must clear before drawing line since tabs on some terminals |
446 | * do not erase what they tab over. | |
447 | */ | |
448 | if (clreol) | |
449 | cleareol (); | |
ffa58356 ES |
450 | prbuf (Line, length); |
451 | if (nchars < promptlen) | |
452 | erase (nchars); /* erase () sets promptlen to 0 */ | |
453 | else promptlen = 0; | |
35bd36fc BJ |
454 | /* is this needed? |
455 | * if (clreol) | |
456 | * cleareol(); /* must clear again in case we wrapped * | |
457 | */ | |
ffa58356 | 458 | if (nchars < Mcol || !fold_opt) |
2c880657 | 459 | prbuf("\n", 1); /* will turn off UL if necessary */ |
ffa58356 ES |
460 | if (nchars == STOP) |
461 | break; | |
462 | num_lines--; | |
463 | } | |
2c880657 JK |
464 | if (pstate) { |
465 | tputs(ULexit, 1, putch); | |
466 | pstate = 0; | |
467 | } | |
ffa58356 ES |
468 | fflush(stdout); |
469 | if ((c = Getc(f)) == EOF) | |
38ccf597 | 470 | { |
35bd36fc BJ |
471 | if (clreol) |
472 | clreos (); | |
ffa58356 | 473 | return; |
38ccf597 BJ |
474 | } |
475 | ||
35bd36fc BJ |
476 | if (Pause && clreol) |
477 | clreos (); | |
ffa58356 ES |
478 | Ungetc (c, f); |
479 | setjmp (restore); | |
480 | Pause = 0; startup = 0; | |
481 | if ((num_lines = command (NULL, f)) == 0) | |
482 | return; | |
483 | if (hard && promptlen > 0) | |
484 | erase (0); | |
a97c843b | 485 | if (noscroll && num_lines >= dlines) |
d730d1dc | 486 | { |
35bd36fc BJ |
487 | if (clreol) |
488 | home(); | |
489 | else | |
490 | doclear (); | |
38ccf597 | 491 | } |
ffa58356 ES |
492 | screen_start.line = Currline; |
493 | screen_start.chrctr = Ftell (f); | |
494 | } | |
495 | } | |
496 | ||
497 | /* | |
498 | ** Come here if a quit signal is received | |
499 | */ | |
500 | ||
501 | onquit() | |
502 | { | |
503 | signal(SIGQUIT, SIG_IGN); | |
504 | if (!inwait) { | |
505 | putchar ('\n'); | |
506 | if (!startup) { | |
507 | signal(SIGQUIT, onquit); | |
508 | longjmp (restore, 1); | |
509 | } | |
510 | else | |
511 | Pause++; | |
512 | } | |
513 | else if (!dum_opt && notell) { | |
514 | write (2, "[Use q or Q to quit]", 20); | |
515 | promptlen += 20; | |
516 | notell = 0; | |
517 | } | |
518 | signal(SIGQUIT, onquit); | |
519 | } | |
520 | ||
f27fb120 DS |
521 | /* |
522 | ** Come here if a signal for a window size change is received | |
523 | */ | |
524 | ||
525 | chgwinsz() | |
526 | { | |
527 | struct winsize win; | |
528 | ||
529 | (void) signal(SIGWINCH, SIG_IGN); | |
530 | if (ioctl(fileno(stdout), TIOCGWINSZ, &win) != -1) { | |
531 | if (win.ws_row != 0) { | |
532 | Lpp = win.ws_row; | |
533 | nscroll = Lpp/2 - 1; | |
534 | if (nscroll <= 0) | |
535 | nscroll = 1; | |
536 | dlines = Lpp - (noscroll ? 1 : 2); | |
537 | } | |
538 | if (win.ws_col != 0) | |
539 | Mcol = win.ws_col; | |
540 | } | |
541 | (void) signal(SIGWINCH, chgwinsz); | |
542 | } | |
543 | ||
ffa58356 ES |
544 | /* |
545 | ** Clean up terminal state and exit. Also come here if interrupt signal received | |
546 | */ | |
547 | ||
548 | end_it () | |
549 | { | |
550 | ||
551 | reset_tty (); | |
35bd36fc BJ |
552 | if (clreol) { |
553 | putchar ('\r'); | |
554 | clreos (); | |
555 | fflush (stdout); | |
556 | } | |
38ccf597 | 557 | else if (!clreol && (promptlen > 0)) { |
ffa58356 ES |
558 | kill_line (); |
559 | fflush (stdout); | |
560 | } | |
561 | else | |
562 | write (2, "\n", 1); | |
563 | _exit(0); | |
564 | } | |
565 | ||
566 | copy_file(f) | |
567 | register FILE *f; | |
568 | { | |
569 | register int c; | |
570 | ||
571 | while ((c = getc(f)) != EOF) | |
572 | putchar(c); | |
573 | } | |
574 | ||
575 | /* Simplified printf function */ | |
576 | ||
9b2b5ff7 | 577 | printf (fmt, va_alist) |
ffa58356 | 578 | register char *fmt; |
9b2b5ff7 | 579 | va_dcl |
ffa58356 | 580 | { |
9b2b5ff7 | 581 | va_list ap; |
ffa58356 ES |
582 | register char ch; |
583 | register int ccount; | |
584 | ||
585 | ccount = 0; | |
9b2b5ff7 | 586 | va_start(ap); |
ffa58356 ES |
587 | while (*fmt) { |
588 | while ((ch = *fmt++) != '%') { | |
589 | if (ch == '\0') | |
590 | return (ccount); | |
591 | ccount++; | |
592 | putchar (ch); | |
593 | } | |
594 | switch (*fmt++) { | |
595 | case 'd': | |
9b2b5ff7 | 596 | ccount += printd (va_arg(ap, int)); |
ffa58356 ES |
597 | break; |
598 | case 's': | |
9b2b5ff7 | 599 | ccount += pr (va_arg(ap, char *)); |
ffa58356 ES |
600 | break; |
601 | case '%': | |
602 | ccount++; | |
ffa58356 ES |
603 | putchar ('%'); |
604 | break; | |
605 | case '0': | |
606 | return (ccount); | |
607 | default: | |
608 | break; | |
609 | } | |
ffa58356 | 610 | } |
9b2b5ff7 | 611 | va_end(ap); |
ffa58356 ES |
612 | return (ccount); |
613 | ||
614 | } | |
615 | ||
616 | /* | |
617 | ** Print an integer as a string of decimal digits, | |
618 | ** returning the length of the print representation. | |
619 | */ | |
620 | ||
621 | printd (n) | |
622 | int n; | |
623 | { | |
624 | int a, nchars; | |
625 | ||
626 | if (a = n/10) | |
627 | nchars = 1 + printd(a); | |
628 | else | |
629 | nchars = 1; | |
630 | putchar (n % 10 + '0'); | |
631 | return (nchars); | |
632 | } | |
633 | ||
634 | /* Put the print representation of an integer into a string */ | |
635 | static char *sptr; | |
636 | ||
637 | scanstr (n, str) | |
638 | int n; | |
639 | char *str; | |
640 | { | |
641 | sptr = str; | |
718f6e88 | 642 | Sprintf (n); |
ffa58356 ES |
643 | *sptr = '\0'; |
644 | } | |
645 | ||
718f6e88 | 646 | Sprintf (n) |
ffa58356 ES |
647 | { |
648 | int a; | |
649 | ||
650 | if (a = n/10) | |
718f6e88 | 651 | Sprintf (a); |
ffa58356 ES |
652 | *sptr++ = n % 10 + '0'; |
653 | } | |
654 | ||
3b6cf210 | 655 | static char bell = ctrl('G'); |
ffa58356 ES |
656 | |
657 | strlen (s) | |
658 | char *s; | |
659 | { | |
660 | register char *p; | |
661 | ||
662 | p = s; | |
663 | while (*p++) | |
664 | ; | |
665 | return (p - s - 1); | |
666 | } | |
667 | ||
668 | /* See whether the last component of the path name "path" is equal to the | |
669 | ** string "string" | |
670 | */ | |
671 | ||
672 | tailequ (path, string) | |
673 | char *path; | |
674 | register char *string; | |
675 | { | |
676 | register char *tail; | |
677 | ||
678 | tail = path + strlen(path); | |
679 | while (tail >= path) | |
680 | if (*(--tail) == '/') | |
681 | break; | |
682 | ++tail; | |
683 | while (*tail++ == *string++) | |
684 | if (*tail == '\0') | |
685 | return(1); | |
686 | return(0); | |
687 | } | |
688 | ||
689 | prompt (filename) | |
690 | char *filename; | |
691 | { | |
35bd36fc BJ |
692 | if (clreol) |
693 | cleareol (); | |
38ccf597 | 694 | else if (promptlen > 0) |
ffa58356 ES |
695 | kill_line (); |
696 | if (!hard) { | |
697 | promptlen = 8; | |
2c880657 | 698 | if (Senter && Sexit) { |
ffa58356 | 699 | tputs (Senter, 1, putch); |
2c880657 JK |
700 | promptlen += (2 * soglitch); |
701 | } | |
35bd36fc BJ |
702 | if (clreol) |
703 | cleareol (); | |
ffa58356 ES |
704 | pr("--More--"); |
705 | if (filename != NULL) { | |
706 | promptlen += printf ("(Next file: %s)", filename); | |
707 | } | |
708 | else if (!no_intty) { | |
709 | promptlen += printf ("(%d%%)", (int)((file_pos * 100) / file_size)); | |
710 | } | |
711 | if (dum_opt) { | |
2c880657 | 712 | promptlen += pr("[Press space to continue, 'q' to quit.]"); |
ffa58356 ES |
713 | } |
714 | if (Senter && Sexit) | |
715 | tputs (Sexit, 1, putch); | |
35bd36fc BJ |
716 | if (clreol) |
717 | clreos (); | |
ffa58356 ES |
718 | fflush(stdout); |
719 | } | |
720 | else | |
721 | write (2, &bell, 1); | |
722 | inwait++; | |
723 | } | |
724 | ||
725 | /* | |
726 | ** Get a logical line | |
727 | */ | |
728 | ||
729 | getline(f, length) | |
730 | register FILE *f; | |
731 | int *length; | |
732 | { | |
733 | register int c; | |
734 | register char *p; | |
735 | register int column; | |
736 | static int colflg; | |
737 | ||
738 | p = Line; | |
739 | column = 0; | |
740 | c = Getc (f); | |
741 | if (colflg && c == '\n') { | |
742 | Currline++; | |
743 | c = Getc (f); | |
744 | } | |
745 | while (p < &Line[LINSIZ - 1]) { | |
746 | if (c == EOF) { | |
747 | if (p > Line) { | |
748 | *p = '\0'; | |
749 | *length = p - Line; | |
750 | return (column); | |
751 | } | |
752 | *length = p - Line; | |
753 | return (EOF); | |
754 | } | |
755 | if (c == '\n') { | |
756 | Currline++; | |
757 | break; | |
758 | } | |
759 | *p++ = c; | |
760 | if (c == '\t') | |
76dbb69b EW |
761 | if (!hardtabs || column < promptlen && !hard) { |
762 | if (hardtabs && eraseln && !dumb) { | |
ffa58356 ES |
763 | column = 1 + (column | 7); |
764 | tputs (eraseln, 1, putch); | |
765 | promptlen = 0; | |
766 | } | |
767 | else { | |
76dbb69b | 768 | for (--p; p < &Line[LINSIZ - 1];) { |
ffa58356 | 769 | *p++ = ' '; |
76dbb69b EW |
770 | if ((++column & 7) == 0) |
771 | break; | |
ffa58356 ES |
772 | } |
773 | if (column >= promptlen) promptlen = 0; | |
774 | } | |
775 | } | |
776 | else | |
777 | column = 1 + (column | 7); | |
d1b174c2 | 778 | else if (c == '\b' && column > 0) |
ffa58356 ES |
779 | column--; |
780 | else if (c == '\r') | |
781 | column = 0; | |
782 | else if (c == '\f' && stop_opt) { | |
783 | p[-1] = '^'; | |
784 | *p++ = 'L'; | |
785 | column += 2; | |
786 | Pause++; | |
787 | } | |
788 | else if (c == EOF) { | |
789 | *length = p - Line; | |
790 | return (column); | |
791 | } | |
792 | else if (c >= ' ' && c != RUBOUT) | |
793 | column++; | |
794 | if (column >= Mcol && fold_opt) break; | |
795 | c = Getc (f); | |
796 | } | |
797 | if (column >= Mcol && Mcol > 0) { | |
798 | if (!Wrap) { | |
799 | *p++ = '\n'; | |
800 | } | |
801 | } | |
802 | colflg = column == Mcol && fold_opt; | |
06e20570 JB |
803 | if (colflg && eatnl && Wrap) { |
804 | *p++ = '\n'; /* simulate normal wrap */ | |
805 | } | |
ffa58356 ES |
806 | *length = p - Line; |
807 | *p = 0; | |
808 | return (column); | |
809 | } | |
810 | ||
811 | /* | |
812 | ** Erase the rest of the prompt, assuming we are starting at column col. | |
813 | */ | |
814 | ||
815 | erase (col) | |
816 | register int col; | |
817 | { | |
818 | ||
819 | if (promptlen == 0) | |
820 | return; | |
821 | if (hard) { | |
822 | putchar ('\n'); | |
823 | } | |
824 | else { | |
825 | if (col == 0) | |
826 | putchar ('\r'); | |
827 | if (!dumb && eraseln) | |
828 | tputs (eraseln, 1, putch); | |
829 | else | |
830 | for (col = promptlen - col; col > 0; col--) | |
831 | putchar (' '); | |
832 | } | |
833 | promptlen = 0; | |
834 | } | |
835 | ||
836 | /* | |
837 | ** Erase the current line entirely | |
838 | */ | |
839 | ||
840 | kill_line () | |
841 | { | |
842 | erase (0); | |
843 | if (!eraseln || dumb) putchar ('\r'); | |
844 | } | |
845 | ||
38ccf597 BJ |
846 | /* |
847 | * force clear to end of line | |
848 | */ | |
849 | cleareol() | |
850 | { | |
35bd36fc | 851 | tputs(eraseln, 1, putch); |
38ccf597 BJ |
852 | } |
853 | ||
35bd36fc | 854 | clreos() |
38ccf597 | 855 | { |
35bd36fc | 856 | tputs(EodClr, 1, putch); |
38ccf597 BJ |
857 | } |
858 | ||
ffa58356 ES |
859 | /* |
860 | ** Print string and return number of characters | |
861 | */ | |
862 | ||
863 | pr(s1) | |
864 | char *s1; | |
865 | { | |
866 | register char *s; | |
867 | register char c; | |
868 | ||
869 | for (s = s1; c = *s++; ) | |
870 | putchar(c); | |
871 | return (s - s1 - 1); | |
872 | } | |
873 | ||
874 | ||
875 | /* Print a buffer of n characters */ | |
876 | ||
877 | prbuf (s, n) | |
878 | register char *s; | |
879 | register int n; | |
880 | { | |
2c880657 | 881 | register char c; /* next output character */ |
35bd36fc | 882 | register int state; /* next output char's UL state */ |
2c880657 | 883 | #define wouldul(s,n) ((n) >= 2 && (((s)[0] == '_' && (s)[1] == '\b') || ((s)[1] == '\b' && (s)[2] == '_'))) |
35bd36fc BJ |
884 | |
885 | while (--n >= 0) | |
886 | if (!ul_opt) | |
887 | putchar (*s++); | |
888 | else { | |
2c880657 JK |
889 | if (*s == ' ' && pstate == 0 && ulglitch && wouldul(s+1, n-1)) { |
890 | s++; | |
891 | continue; | |
892 | } | |
893 | if (state = wouldul(s, n)) { | |
894 | c = (*s == '_')? s[2] : *s ; | |
35bd36fc | 895 | n -= 2; |
2c880657 JK |
896 | s += 3; |
897 | } else | |
35bd36fc | 898 | c = *s++; |
2c880657 JK |
899 | if (state != pstate) { |
900 | if (c == ' ' && state == 0 && ulglitch && wouldul(s, n-1)) | |
901 | state = 1; | |
902 | else | |
903 | tputs(state ? ULenter : ULexit, 1, putch); | |
35bd36fc | 904 | } |
2c880657 JK |
905 | if (c != ' ' || pstate == 0 || state != 0 || ulglitch == 0) |
906 | putchar(c); | |
35bd36fc BJ |
907 | if (state && *chUL) { |
908 | pr(chBS); | |
909 | tputs(chUL, 1, putch); | |
910 | } | |
2c880657 | 911 | pstate = state; |
35bd36fc | 912 | } |
ffa58356 ES |
913 | } |
914 | ||
915 | /* | |
916 | ** Clear the screen | |
917 | */ | |
918 | ||
919 | doclear() | |
920 | { | |
921 | if (Clear && !hard) { | |
922 | tputs(Clear, 1, putch); | |
923 | ||
924 | /* Put out carriage return so that system doesn't | |
925 | ** get confused by escape sequences when expanding tabs | |
926 | */ | |
927 | putchar ('\r'); | |
928 | promptlen = 0; | |
929 | } | |
930 | } | |
931 | ||
38ccf597 BJ |
932 | /* |
933 | * Go to home position | |
934 | */ | |
935 | home() | |
936 | { | |
937 | tputs(Home,1,putch); | |
938 | } | |
939 | ||
ffa58356 ES |
940 | static int lastcmd, lastarg, lastp; |
941 | static int lastcolon; | |
942 | char shell_line[132]; | |
943 | ||
944 | /* | |
945 | ** Read a command and do it. A command consists of an optional integer | |
946 | ** argument followed by the command character. Return the number of lines | |
947 | ** to display in the next screenful. If there is nothing more to display | |
948 | ** in the current file, zero is returned. | |
949 | */ | |
950 | ||
951 | command (filename, f) | |
952 | char *filename; | |
953 | register FILE *f; | |
954 | { | |
955 | register int nlines; | |
956 | register int retval; | |
957 | register char c; | |
958 | char colonch; | |
959 | FILE *helpf; | |
960 | int done; | |
961 | char comchar, cmdbuf[80], *p; | |
962 | ||
963 | #define ret(val) retval=val;done++;break | |
964 | ||
965 | done = 0; | |
966 | if (!errors) | |
967 | prompt (filename); | |
968 | else | |
969 | errors = 0; | |
970 | if (MBIT == RAW && slow_tty) { | |
971 | otty.sg_flags |= MBIT; | |
d730d1dc | 972 | stty(fileno(stderr), &otty); |
ffa58356 ES |
973 | } |
974 | for (;;) { | |
975 | nlines = number (&comchar); | |
976 | lastp = colonch = 0; | |
977 | if (comchar == '.') { /* Repeat last command */ | |
978 | lastp++; | |
979 | comchar = lastcmd; | |
980 | nlines = lastarg; | |
981 | if (lastcmd == ':') | |
982 | colonch = lastcolon; | |
983 | } | |
984 | lastcmd = comchar; | |
985 | lastarg = nlines; | |
986 | if (comchar == otty.sg_erase) { | |
987 | kill_line (); | |
988 | prompt (filename); | |
989 | continue; | |
990 | } | |
991 | switch (comchar) { | |
992 | case ':': | |
993 | retval = colon (filename, colonch, nlines); | |
994 | if (retval >= 0) | |
995 | done++; | |
996 | break; | |
4d242f02 | 997 | case 'b': |
3b6cf210 | 998 | case ctrl('B'): |
4d242f02 JB |
999 | { |
1000 | register int initline; | |
1001 | ||
1002 | if (no_intty) { | |
1003 | write(2, &bell, 1); | |
1004 | return (-1); | |
1005 | } | |
1006 | ||
1007 | if (nlines == 0) nlines++; | |
1008 | ||
1009 | putchar ('\r'); | |
1010 | erase (0); | |
1011 | printf ("\n"); | |
1012 | if (clreol) | |
1013 | cleareol (); | |
1014 | printf ("...back %d page", nlines); | |
1015 | if (nlines > 1) | |
1016 | pr ("s\n"); | |
1017 | else | |
1018 | pr ("\n"); | |
1019 | ||
1020 | if (clreol) | |
1021 | cleareol (); | |
1022 | pr ("\n"); | |
1023 | ||
1024 | initline = Currline - dlines * (nlines + 1); | |
1025 | if (! noscroll) | |
1026 | --initline; | |
1027 | if (initline < 0) initline = 0; | |
1028 | Fseek(f, 0L); | |
1029 | Currline = 0; /* skiplns() will make Currline correct */ | |
1030 | skiplns(initline, f); | |
1031 | if (! noscroll) { | |
1032 | ret(dlines + 1); | |
1033 | } | |
1034 | else { | |
1035 | ret(dlines); | |
1036 | } | |
1037 | } | |
ffa58356 ES |
1038 | case ' ': |
1039 | case 'z': | |
1040 | if (nlines == 0) nlines = dlines; | |
1041 | else if (comchar == 'z') dlines = nlines; | |
1042 | ret (nlines); | |
1043 | case 'd': | |
3b6cf210 | 1044 | case ctrl('D'): |
ffa58356 ES |
1045 | if (nlines != 0) nscroll = nlines; |
1046 | ret (nscroll); | |
ffa58356 ES |
1047 | case 'q': |
1048 | case 'Q': | |
1049 | end_it (); | |
1050 | case 's': | |
1051 | case 'f': | |
1052 | if (nlines == 0) nlines++; | |
1053 | if (comchar == 'f') | |
1054 | nlines *= dlines; | |
1055 | putchar ('\r'); | |
1056 | erase (0); | |
35bd36fc BJ |
1057 | printf ("\n"); |
1058 | if (clreol) | |
1059 | cleareol (); | |
1060 | printf ("...skipping %d line", nlines); | |
ffa58356 | 1061 | if (nlines > 1) |
35bd36fc | 1062 | pr ("s\n"); |
ffa58356 | 1063 | else |
35bd36fc BJ |
1064 | pr ("\n"); |
1065 | ||
1066 | if (clreol) | |
1067 | cleareol (); | |
1068 | pr ("\n"); | |
1069 | ||
ffa58356 ES |
1070 | while (nlines > 0) { |
1071 | while ((c = Getc (f)) != '\n') | |
1072 | if (c == EOF) { | |
1073 | retval = 0; | |
1074 | done++; | |
1075 | goto endsw; | |
1076 | } | |
1077 | Currline++; | |
1078 | nlines--; | |
1079 | } | |
1080 | ret (dlines); | |
1081 | case '\n': | |
1082 | if (nlines != 0) | |
1083 | dlines = nlines; | |
1084 | else | |
1085 | nlines = 1; | |
1086 | ret (nlines); | |
1087 | case '\f': | |
1088 | if (!no_intty) { | |
1089 | doclear (); | |
1090 | Fseek (f, screen_start.chrctr); | |
1091 | Currline = screen_start.line; | |
1092 | ret (dlines); | |
1093 | } | |
1094 | else { | |
1095 | write (2, &bell, 1); | |
1096 | break; | |
1097 | } | |
1098 | case '\'': | |
1099 | if (!no_intty) { | |
1100 | kill_line (); | |
1101 | pr ("\n***Back***\n\n"); | |
1102 | Fseek (f, context.chrctr); | |
1103 | Currline = context.line; | |
1104 | ret (dlines); | |
1105 | } | |
1106 | else { | |
1107 | write (2, &bell, 1); | |
1108 | break; | |
1109 | } | |
1110 | case '=': | |
1111 | kill_line (); | |
1112 | promptlen = printd (Currline); | |
1113 | fflush (stdout); | |
1114 | break; | |
1115 | case 'n': | |
1116 | lastp++; | |
1117 | case '/': | |
1118 | if (nlines == 0) nlines++; | |
1119 | kill_line (); | |
1120 | pr ("/"); | |
1121 | promptlen = 1; | |
1122 | fflush (stdout); | |
1123 | if (lastp) { | |
1124 | write (2,"\r", 1); | |
1125 | search (NULL, f, nlines); /* Use previous r.e. */ | |
1126 | } | |
1127 | else { | |
1128 | ttyin (cmdbuf, 78, '/'); | |
1129 | write (2, "\r", 1); | |
1130 | search (cmdbuf, f, nlines); | |
1131 | } | |
38ccf597 | 1132 | ret (dlines-1); |
ffa58356 ES |
1133 | case '!': |
1134 | do_shell (filename); | |
1135 | break; | |
4d242f02 | 1136 | case '?': |
ffa58356 ES |
1137 | case 'h': |
1138 | if ((helpf = fopen (HELPFILE, "r")) == NULL) | |
1139 | error ("Can't open help file"); | |
1140 | if (noscroll) doclear (); | |
1141 | copy_file (helpf); | |
f27fb120 | 1142 | fclose (helpf); |
ffa58356 ES |
1143 | prompt (filename); |
1144 | break; | |
1145 | case 'v': /* This case should go right before default */ | |
1146 | if (!no_intty) { | |
1147 | kill_line (); | |
1148 | cmdbuf[0] = '+'; | |
4d242f02 JB |
1149 | scanstr (Currline - dlines < 0 ? 0 |
1150 | : Currline - (dlines + 1) / 2, &cmdbuf[1]); | |
ffa58356 ES |
1151 | pr ("vi "); pr (cmdbuf); putchar (' '); pr (fnames[fnum]); |
1152 | execute (filename, VI, "vi", cmdbuf, fnames[fnum], 0); | |
1153 | break; | |
1154 | } | |
1155 | default: | |
2c880657 JK |
1156 | if (dum_opt) { |
1157 | kill_line (); | |
1158 | if (Senter && Sexit) { | |
1159 | tputs (Senter, 1, putch); | |
1160 | promptlen = pr ("[Press 'h' for instructions.]") + (2 * soglitch); | |
1161 | tputs (Sexit, 1, putch); | |
1162 | } | |
1163 | else | |
1164 | promptlen = pr ("[Press 'h' for instructions.]"); | |
1165 | fflush (stdout); | |
1166 | } | |
1167 | else | |
1168 | write (2, &bell, 1); | |
ffa58356 ES |
1169 | break; |
1170 | } | |
1171 | if (done) break; | |
1172 | } | |
1173 | putchar ('\r'); | |
1174 | endsw: | |
1175 | inwait = 0; | |
1176 | notell++; | |
1177 | if (MBIT == RAW && slow_tty) { | |
1178 | otty.sg_flags &= ~MBIT; | |
d730d1dc | 1179 | stty(fileno(stderr), &otty); |
ffa58356 ES |
1180 | } |
1181 | return (retval); | |
1182 | } | |
1183 | ||
1184 | char ch; | |
1185 | ||
1186 | /* | |
1187 | * Execute a colon-prefixed command. | |
1188 | * Returns <0 if not a command that should cause | |
1189 | * more of the file to be printed. | |
1190 | */ | |
1191 | ||
1192 | colon (filename, cmd, nlines) | |
1193 | char *filename; | |
1194 | int cmd; | |
1195 | int nlines; | |
1196 | { | |
1197 | if (cmd == 0) | |
1198 | ch = readch (); | |
1199 | else | |
1200 | ch = cmd; | |
1201 | lastcolon = ch; | |
1202 | switch (ch) { | |
1203 | case 'f': | |
1204 | kill_line (); | |
1205 | if (!no_intty) | |
1206 | promptlen = printf ("\"%s\" line %d", fnames[fnum], Currline); | |
1207 | else | |
1208 | promptlen = printf ("[Not a file] line %d", Currline); | |
1209 | fflush (stdout); | |
1210 | return (-1); | |
1211 | case 'n': | |
1212 | if (nlines == 0) { | |
1213 | if (fnum >= nfiles - 1) | |
1214 | end_it (); | |
1215 | nlines++; | |
1216 | } | |
1217 | putchar ('\r'); | |
1218 | erase (0); | |
1219 | skipf (nlines); | |
1220 | return (0); | |
1221 | case 'p': | |
1222 | if (no_intty) { | |
1223 | write (2, &bell, 1); | |
1224 | return (-1); | |
1225 | } | |
1226 | putchar ('\r'); | |
1227 | erase (0); | |
1228 | if (nlines == 0) | |
1229 | nlines++; | |
1230 | skipf (-nlines); | |
1231 | return (0); | |
1232 | case '!': | |
1233 | do_shell (filename); | |
1234 | return (-1); | |
1235 | case 'q': | |
1236 | case 'Q': | |
1237 | end_it (); | |
1238 | default: | |
1239 | write (2, &bell, 1); | |
1240 | return (-1); | |
1241 | } | |
1242 | } | |
1243 | ||
1244 | /* | |
1245 | ** Read a decimal number from the terminal. Set cmd to the non-digit which | |
1246 | ** terminates the number. | |
1247 | */ | |
1248 | ||
1249 | number(cmd) | |
1250 | char *cmd; | |
1251 | { | |
1252 | register int i; | |
1253 | ||
1254 | i = 0; ch = otty.sg_kill; | |
1255 | for (;;) { | |
1256 | ch = readch (); | |
1257 | if (ch >= '0' && ch <= '9') | |
1258 | i = i*10 + ch - '0'; | |
1259 | else if (ch == otty.sg_kill) | |
1260 | i = 0; | |
1261 | else { | |
1262 | *cmd = ch; | |
1263 | break; | |
1264 | } | |
1265 | } | |
1266 | return (i); | |
1267 | } | |
1268 | ||
1269 | do_shell (filename) | |
1270 | char *filename; | |
1271 | { | |
1272 | char cmdbuf[80]; | |
1273 | ||
1274 | kill_line (); | |
1275 | pr ("!"); | |
1276 | fflush (stdout); | |
1277 | promptlen = 1; | |
1278 | if (lastp) | |
1279 | pr (shell_line); | |
1280 | else { | |
1281 | ttyin (cmdbuf, 78, '!'); | |
1282 | if (expand (shell_line, cmdbuf)) { | |
1283 | kill_line (); | |
1284 | promptlen = printf ("!%s", shell_line); | |
1285 | } | |
1286 | } | |
1287 | fflush (stdout); | |
1288 | write (2, "\n", 1); | |
1289 | promptlen = 0; | |
1290 | shellp = 1; | |
1291 | execute (filename, shell, shell, "-c", shell_line, 0); | |
1292 | } | |
1293 | ||
1294 | /* | |
1295 | ** Search for nth ocurrence of regular expression contained in buf in the file | |
1296 | */ | |
1297 | ||
1298 | search (buf, file, n) | |
1299 | char buf[]; | |
1300 | FILE *file; | |
1301 | register int n; | |
1302 | { | |
1303 | long startline = Ftell (file); | |
1304 | register long line1 = startline; | |
1305 | register long line2 = startline; | |
1306 | register long line3 = startline; | |
1307 | register int lncount; | |
1308 | int saveln, rv, re_exec(); | |
1309 | char *s, *re_comp(); | |
1310 | ||
1311 | context.line = saveln = Currline; | |
1312 | context.chrctr = startline; | |
1313 | lncount = 0; | |
1314 | if ((s = re_comp (buf)) != 0) | |
1315 | error (s); | |
1316 | while (!feof (file)) { | |
1317 | line3 = line2; | |
1318 | line2 = line1; | |
1319 | line1 = Ftell (file); | |
1320 | rdline (file); | |
1321 | lncount++; | |
1322 | if ((rv = re_exec (Line)) == 1) | |
1323 | if (--n == 0) { | |
1324 | if (lncount > 3 || (lncount > 1 && no_intty)) | |
38ccf597 BJ |
1325 | { |
1326 | pr ("\n"); | |
35bd36fc BJ |
1327 | if (clreol) |
1328 | cleareol (); | |
38ccf597 BJ |
1329 | pr("...skipping\n"); |
1330 | } | |
ffa58356 ES |
1331 | if (!no_intty) { |
1332 | Currline -= (lncount >= 3 ? 3 : lncount); | |
1333 | Fseek (file, line3); | |
35bd36fc BJ |
1334 | if (noscroll) |
1335 | if (clreol) { | |
1336 | home (); | |
1337 | cleareol (); | |
d730d1dc | 1338 | } |
35bd36fc BJ |
1339 | else |
1340 | doclear (); | |
ffa58356 ES |
1341 | } |
1342 | else { | |
1343 | kill_line (); | |
35bd36fc BJ |
1344 | if (noscroll) |
1345 | if (clreol) { | |
d730d1dc | 1346 | home (); |
35bd36fc | 1347 | cleareol (); |
d730d1dc | 1348 | } |
35bd36fc BJ |
1349 | else |
1350 | doclear (); | |
ffa58356 ES |
1351 | pr (Line); |
1352 | putchar ('\n'); | |
1353 | } | |
1354 | break; | |
1355 | } | |
1356 | else if (rv == -1) | |
1357 | error ("Regular expression botch"); | |
1358 | } | |
1359 | if (feof (file)) { | |
1360 | if (!no_intty) { | |
ffa58356 | 1361 | file->_flag &= ~_IOEOF; /* why doesn't fseek do this ??!!??! */ |
ffa58356 ES |
1362 | Currline = saveln; |
1363 | Fseek (file, startline); | |
1364 | } | |
1365 | else { | |
1366 | pr ("\nPattern not found\n"); | |
1367 | end_it (); | |
1368 | } | |
1369 | error ("Pattern not found"); | |
1370 | } | |
1371 | } | |
1372 | ||
9b2b5ff7 KB |
1373 | /*VARARGS2*/ |
1374 | execute (filename, cmd, va_alist) | |
ffa58356 | 1375 | char *filename; |
9b2b5ff7 KB |
1376 | char *cmd; |
1377 | va_dcl | |
ffa58356 ES |
1378 | { |
1379 | int id; | |
2c880657 | 1380 | int n; |
9b2b5ff7 | 1381 | va_list argp; |
ffa58356 ES |
1382 | |
1383 | fflush (stdout); | |
1384 | reset_tty (); | |
2c880657 | 1385 | for (n = 10; (id = fork ()) < 0 && n > 0; n--) |
ffa58356 ES |
1386 | sleep (5); |
1387 | if (id == 0) { | |
2c880657 JK |
1388 | if (!isatty(0)) { |
1389 | close(0); | |
1390 | open("/dev/tty", 0); | |
1391 | } | |
9b2b5ff7 KB |
1392 | va_start(argp); |
1393 | execv (cmd, argp); | |
ffa58356 ES |
1394 | write (2, "exec failed\n", 12); |
1395 | exit (1); | |
772ccdb7 | 1396 | va_end(argp); /* balance {}'s for some UNIX's */ |
ffa58356 | 1397 | } |
2c880657 JK |
1398 | if (id > 0) { |
1399 | signal (SIGINT, SIG_IGN); | |
1400 | signal (SIGQUIT, SIG_IGN); | |
1401 | if (catch_susp) | |
1402 | signal(SIGTSTP, SIG_DFL); | |
1403 | while (wait(0) > 0); | |
1404 | signal (SIGINT, end_it); | |
1405 | signal (SIGQUIT, onquit); | |
1406 | if (catch_susp) | |
1407 | signal(SIGTSTP, onsusp); | |
1408 | } else | |
1409 | write(2, "can't fork\n", 11); | |
ffa58356 ES |
1410 | set_tty (); |
1411 | pr ("------------------------\n"); | |
1412 | prompt (filename); | |
1413 | } | |
1414 | /* | |
1415 | ** Skip n lines in the file f | |
1416 | */ | |
1417 | ||
1418 | skiplns (n, f) | |
1419 | register int n; | |
1420 | register FILE *f; | |
1421 | { | |
1422 | register char c; | |
1423 | ||
1424 | while (n > 0) { | |
1425 | while ((c = Getc (f)) != '\n') | |
1426 | if (c == EOF) | |
1427 | return; | |
1428 | n--; | |
1429 | Currline++; | |
1430 | } | |
1431 | } | |
1432 | ||
1433 | /* | |
1434 | ** Skip nskip files in the file list (from the command line). Nskip may be | |
1435 | ** negative. | |
1436 | */ | |
1437 | ||
1438 | skipf (nskip) | |
1439 | register int nskip; | |
1440 | { | |
1441 | if (nskip == 0) return; | |
1442 | if (nskip > 0) { | |
1443 | if (fnum + nskip > nfiles - 1) | |
1444 | nskip = nfiles - fnum - 1; | |
1445 | } | |
1446 | else if (within) | |
1447 | ++fnum; | |
1448 | fnum += nskip; | |
1449 | if (fnum < 0) | |
1450 | fnum = 0; | |
35bd36fc | 1451 | pr ("\n...Skipping "); |
38ccf597 | 1452 | pr ("\n"); |
35bd36fc BJ |
1453 | if (clreol) |
1454 | cleareol (); | |
38ccf597 | 1455 | pr ("...Skipping "); |
ffa58356 ES |
1456 | pr (nskip > 0 ? "to file " : "back to file "); |
1457 | pr (fnames[fnum]); | |
38ccf597 | 1458 | pr ("\n"); |
35bd36fc BJ |
1459 | if (clreol) |
1460 | cleareol (); | |
38ccf597 | 1461 | pr ("\n"); |
ffa58356 ES |
1462 | --fnum; |
1463 | } | |
1464 | ||
1465 | /*----------------------------- Terminal I/O -------------------------------*/ | |
1466 | ||
1467 | initterm () | |
1468 | { | |
1469 | char buf[TBUFSIZ]; | |
8cb6d801 | 1470 | static char clearbuf[TBUFSIZ]; |
ffa58356 | 1471 | char *clearptr, *padstr; |
ffa58356 | 1472 | int ldisc; |
4a56d647 | 1473 | int lmode; |
54decef9 | 1474 | char *term; |
d730d1dc | 1475 | int tgrp; |
d3e7b534 | 1476 | struct winsize win; |
ffa58356 | 1477 | |
d730d1dc CL |
1478 | retry: |
1479 | if (!(no_tty = gtty(fileno(stdout), &otty))) { | |
4a56d647 CL |
1480 | if (ioctl(fileno(stdout), TIOCLGET, &lmode) < 0) { |
1481 | perror("TIOCLGET"); | |
1482 | exit(1); | |
1483 | } | |
1484 | docrterase = ((lmode & LCRTERA) != 0); | |
1485 | docrtkill = ((lmode & LCRTKIL) != 0); | |
d730d1dc | 1486 | /* |
4a56d647 CL |
1487 | * Wait until we're in the foreground before we save the |
1488 | * the terminal modes. | |
d730d1dc CL |
1489 | */ |
1490 | if (ioctl(fileno(stdout), TIOCGPGRP, &tgrp) < 0) { | |
4a56d647 | 1491 | perror("TIOCGPGRP"); |
d730d1dc CL |
1492 | exit(1); |
1493 | } | |
1494 | if (tgrp != getpgrp(0)) { | |
1495 | kill(0, SIGTTOU); | |
1496 | goto retry; | |
1497 | } | |
8828eef4 | 1498 | if ((term = getenv("TERM")) == 0 || tgetent(buf, term) <= 0) { |
35bd36fc | 1499 | dumb++; ul_opt = 0; |
ffa58356 ES |
1500 | } |
1501 | else { | |
d3e7b534 JB |
1502 | if (ioctl(fileno(stdout), TIOCGWINSZ, &win) < 0) { |
1503 | Lpp = tgetnum("li"); | |
1504 | Mcol = tgetnum("co"); | |
1505 | } else { | |
1506 | if ((Lpp = win.ws_row) == 0) | |
1507 | Lpp = tgetnum("li"); | |
1508 | if ((Mcol = win.ws_col) == 0) | |
1509 | Mcol = tgetnum("co"); | |
1510 | } | |
1511 | if ((Lpp <= 0) || tgetflag("hc")) { | |
ffa58356 ES |
1512 | hard++; /* Hard copy terminal */ |
1513 | Lpp = 24; | |
1514 | } | |
06e20570 JB |
1515 | if (tgetflag("xn")) |
1516 | eatnl++; /* Eat newline at last column + 1; dec, concept */ | |
d3e7b534 JB |
1517 | if (Mcol <= 0) |
1518 | Mcol = 80; | |
1519 | ||
ffa58356 ES |
1520 | if (tailequ (fnames[0], "page") || !hard && tgetflag("ns")) |
1521 | noscroll++; | |
ffa58356 ES |
1522 | Wrap = tgetflag("am"); |
1523 | bad_so = tgetflag ("xs"); | |
1524 | clearptr = clearbuf; | |
1525 | eraseln = tgetstr("ce",&clearptr); | |
1526 | Clear = tgetstr("cl", &clearptr); | |
1527 | Senter = tgetstr("so", &clearptr); | |
1528 | Sexit = tgetstr("se", &clearptr); | |
2c880657 JK |
1529 | if ((soglitch = tgetnum("sg")) < 0) |
1530 | soglitch = 0; | |
35bd36fc BJ |
1531 | |
1532 | /* | |
1533 | * Set up for underlining: some terminals don't need it; | |
1534 | * others have start/stop sequences, still others have an | |
1535 | * underline char sequence which is assumed to move the | |
1536 | * cursor forward one character. If underline sequence | |
1537 | * isn't available, settle for standout sequence. | |
1538 | */ | |
1539 | ||
1540 | if (tgetflag("ul") || tgetflag("os")) | |
1541 | ul_opt = 0; | |
1542 | if ((chUL = tgetstr("uc", &clearptr)) == NULL ) | |
1543 | chUL = ""; | |
2c880657 JK |
1544 | if (((ULenter = tgetstr("us", &clearptr)) == NULL || |
1545 | (ULexit = tgetstr("ue", &clearptr)) == NULL) && !*chUL) { | |
1546 | if ((ULenter = Senter) == NULL || (ULexit = Sexit) == NULL) { | |
1547 | ULenter = ""; | |
1548 | ULexit = ""; | |
1549 | } else | |
1550 | ulglitch = soglitch; | |
1551 | } else { | |
1552 | if ((ulglitch = tgetnum("ug")) < 0) | |
1553 | ulglitch = 0; | |
1554 | } | |
d730d1dc | 1555 | |
ffa58356 ES |
1556 | if (padstr = tgetstr("pc", &clearptr)) |
1557 | PC = *padstr; | |
38ccf597 | 1558 | Home = tgetstr("ho",&clearptr); |
ddbe1116 | 1559 | if (Home == 0 || *Home == '\0') |
38ccf597 | 1560 | { |
35bd36fc BJ |
1561 | if ((cursorm = tgetstr("cm", &clearptr)) != NULL) { |
1562 | strcpy(cursorhome, tgoto(cursorm, 0, 0)); | |
38ccf597 BJ |
1563 | Home = cursorhome; |
1564 | } | |
1565 | } | |
35bd36fc | 1566 | EodClr = tgetstr("cd", &clearptr); |
7d256058 KM |
1567 | if ((chBS = tgetstr("bc", &clearptr)) == NULL) |
1568 | chBS = "\b"; | |
1569 | ||
ffa58356 ES |
1570 | } |
1571 | if ((shell = getenv("SHELL")) == NULL) | |
1572 | shell = "/bin/sh"; | |
1573 | } | |
d730d1dc CL |
1574 | no_intty = gtty(fileno(stdin), &otty); |
1575 | gtty(fileno(stderr), &otty); | |
8828eef4 | 1576 | savetty = otty; |
ffa58356 ES |
1577 | ospeed = otty.sg_ospeed; |
1578 | slow_tty = ospeed < B1200; | |
f27fb120 | 1579 | hardtabs = (otty.sg_flags & TBDELAY) != XTABS; |
ffa58356 ES |
1580 | if (!no_tty) { |
1581 | otty.sg_flags &= ~ECHO; | |
1582 | if (MBIT == CBREAK || !slow_tty) | |
1583 | otty.sg_flags |= MBIT; | |
1584 | } | |
1585 | } | |
1586 | ||
1587 | readch () | |
1588 | { | |
1589 | char ch; | |
1590 | extern int errno; | |
1591 | ||
06b4bd81 | 1592 | errno = 0; |
ffa58356 ES |
1593 | if (read (2, &ch, 1) <= 0) |
1594 | if (errno != EINTR) | |
06b4bd81 | 1595 | end_it(); |
ffa58356 ES |
1596 | else |
1597 | ch = otty.sg_kill; | |
1598 | return (ch); | |
1599 | } | |
1600 | ||
1601 | static char BS = '\b'; | |
4a56d647 | 1602 | static char *BSB = "\b \b"; |
ffa58356 | 1603 | static char CARAT = '^'; |
4a56d647 CL |
1604 | #define ERASEONECHAR \ |
1605 | if (docrterase) \ | |
1606 | write (2, BSB, sizeof(BSB)); \ | |
1607 | else \ | |
1608 | write (2, &BS, sizeof(BS)); | |
ffa58356 ES |
1609 | |
1610 | ttyin (buf, nmax, pchar) | |
1611 | char buf[]; | |
1612 | register int nmax; | |
1613 | char pchar; | |
1614 | { | |
1615 | register char *sptr; | |
1616 | register char ch; | |
1617 | register int slash = 0; | |
1618 | int maxlen; | |
1619 | char cbuf; | |
1620 | ||
1621 | sptr = buf; | |
1622 | maxlen = 0; | |
1623 | while (sptr - buf < nmax) { | |
1624 | if (promptlen > maxlen) maxlen = promptlen; | |
1625 | ch = readch (); | |
1626 | if (ch == '\\') { | |
1627 | slash++; | |
1628 | } | |
1629 | else if ((ch == otty.sg_erase) && !slash) { | |
1630 | if (sptr > buf) { | |
1631 | --promptlen; | |
4a56d647 | 1632 | ERASEONECHAR |
ffa58356 ES |
1633 | --sptr; |
1634 | if ((*sptr < ' ' && *sptr != '\n') || *sptr == RUBOUT) { | |
1635 | --promptlen; | |
4a56d647 | 1636 | ERASEONECHAR |
ffa58356 ES |
1637 | } |
1638 | continue; | |
1639 | } | |
1640 | else { | |
1641 | if (!eraseln) promptlen = maxlen; | |
1642 | longjmp (restore, 1); | |
1643 | } | |
1644 | } | |
1645 | else if ((ch == otty.sg_kill) && !slash) { | |
1646 | if (hard) { | |
1647 | show (ch); | |
1648 | putchar ('\n'); | |
1649 | putchar (pchar); | |
1650 | } | |
1651 | else { | |
1652 | putchar ('\r'); | |
1653 | putchar (pchar); | |
1654 | if (eraseln) | |
1655 | erase (1); | |
4a56d647 CL |
1656 | else if (docrtkill) |
1657 | while (promptlen-- > 1) | |
1658 | write (2, BSB, sizeof(BSB)); | |
ffa58356 ES |
1659 | promptlen = 1; |
1660 | } | |
1661 | sptr = buf; | |
1662 | fflush (stdout); | |
1663 | continue; | |
1664 | } | |
1665 | if (slash && (ch == otty.sg_kill || ch == otty.sg_erase)) { | |
4a56d647 | 1666 | ERASEONECHAR |
ffa58356 ES |
1667 | --sptr; |
1668 | } | |
1669 | if (ch != '\\') | |
1670 | slash = 0; | |
1671 | *sptr++ = ch; | |
1672 | if ((ch < ' ' && ch != '\n' && ch != ESC) || ch == RUBOUT) { | |
1673 | ch += ch == RUBOUT ? -0100 : 0100; | |
1674 | write (2, &CARAT, 1); | |
1675 | promptlen++; | |
1676 | } | |
1677 | cbuf = ch; | |
1678 | if (ch != '\n' && ch != ESC) { | |
1679 | write (2, &cbuf, 1); | |
1680 | promptlen++; | |
1681 | } | |
1682 | else | |
1683 | break; | |
1684 | } | |
1685 | *--sptr = '\0'; | |
1686 | if (!eraseln) promptlen = maxlen; | |
1687 | if (sptr - buf >= nmax - 1) | |
1688 | error ("Line too long"); | |
1689 | } | |
1690 | ||
1691 | expand (outbuf, inbuf) | |
1692 | char *outbuf; | |
1693 | char *inbuf; | |
1694 | { | |
1695 | register char *instr; | |
1696 | register char *outstr; | |
1697 | register char ch; | |
1698 | char temp[200]; | |
1699 | int changed = 0; | |
1700 | ||
1701 | instr = inbuf; | |
1702 | outstr = temp; | |
1703 | while ((ch = *instr++) != '\0') | |
1704 | switch (ch) { | |
1705 | case '%': | |
1706 | if (!no_intty) { | |
1707 | strcpy (outstr, fnames[fnum]); | |
1708 | outstr += strlen (fnames[fnum]); | |
1709 | changed++; | |
1710 | } | |
1711 | else | |
1712 | *outstr++ = ch; | |
1713 | break; | |
1714 | case '!': | |
1715 | if (!shellp) | |
1716 | error ("No previous command to substitute for"); | |
1717 | strcpy (outstr, shell_line); | |
1718 | outstr += strlen (shell_line); | |
1719 | changed++; | |
1720 | break; | |
1721 | case '\\': | |
1722 | if (*instr == '%' || *instr == '!') { | |
1723 | *outstr++ = *instr++; | |
1724 | break; | |
1725 | } | |
1726 | default: | |
1727 | *outstr++ = ch; | |
1728 | } | |
1729 | *outstr++ = '\0'; | |
1730 | strcpy (outbuf, temp); | |
1731 | return (changed); | |
1732 | } | |
1733 | ||
1734 | show (ch) | |
1735 | register char ch; | |
1736 | { | |
1737 | char cbuf; | |
1738 | ||
1739 | if ((ch < ' ' && ch != '\n' && ch != ESC) || ch == RUBOUT) { | |
1740 | ch += ch == RUBOUT ? -0100 : 0100; | |
1741 | write (2, &CARAT, 1); | |
1742 | promptlen++; | |
1743 | } | |
1744 | cbuf = ch; | |
1745 | write (2, &cbuf, 1); | |
1746 | promptlen++; | |
1747 | } | |
1748 | ||
1749 | error (mess) | |
1750 | char *mess; | |
1751 | { | |
35bd36fc BJ |
1752 | if (clreol) |
1753 | cleareol (); | |
1754 | else | |
1755 | kill_line (); | |
ffa58356 ES |
1756 | promptlen += strlen (mess); |
1757 | if (Senter && Sexit) { | |
1758 | tputs (Senter, 1, putch); | |
1759 | pr(mess); | |
1760 | tputs (Sexit, 1, putch); | |
1761 | } | |
1762 | else | |
1763 | pr (mess); | |
1764 | fflush(stdout); | |
1765 | errors++; | |
1766 | longjmp (restore, 1); | |
1767 | } | |
1768 | ||
1769 | ||
1770 | set_tty () | |
1771 | { | |
1772 | otty.sg_flags |= MBIT; | |
1773 | otty.sg_flags &= ~ECHO; | |
d730d1dc | 1774 | stty(fileno(stderr), &otty); |
ffa58356 ES |
1775 | } |
1776 | ||
1777 | reset_tty () | |
1778 | { | |
aeb8f381 KB |
1779 | if (no_tty) |
1780 | return; | |
2c880657 JK |
1781 | if (pstate) { |
1782 | tputs(ULexit, 1, putch); | |
1783 | fflush(stdout); | |
1784 | pstate = 0; | |
1785 | } | |
ffa58356 ES |
1786 | otty.sg_flags |= ECHO; |
1787 | otty.sg_flags &= ~MBIT; | |
d730d1dc | 1788 | stty(fileno(stderr), &savetty); |
ffa58356 ES |
1789 | } |
1790 | ||
1791 | rdline (f) | |
1792 | register FILE *f; | |
1793 | { | |
1794 | register char c; | |
1795 | register char *p; | |
1796 | ||
1797 | p = Line; | |
1798 | while ((c = Getc (f)) != '\n' && c != EOF && p - Line < LINSIZ - 1) | |
1799 | *p++ = c; | |
1800 | if (c == '\n') | |
1801 | Currline++; | |
1802 | *p = '\0'; | |
1803 | } | |
1804 | ||
1805 | /* Come here when we get a suspend signal from the terminal */ | |
1806 | ||
ffa58356 ES |
1807 | onsusp () |
1808 | { | |
910bcc08 MK |
1809 | /* ignore SIGTTOU so we don't get stopped if csh grabs the tty */ |
1810 | signal(SIGTTOU, SIG_IGN); | |
ffa58356 ES |
1811 | reset_tty (); |
1812 | fflush (stdout); | |
910bcc08 | 1813 | signal(SIGTTOU, SIG_DFL); |
ffa58356 | 1814 | /* Send the TSTP signal to suspend our process group */ |
2d4fa3b8 SL |
1815 | signal(SIGTSTP, SIG_DFL); |
1816 | sigsetmask(0); | |
ffa58356 ES |
1817 | kill (0, SIGTSTP); |
1818 | /* Pause for station break */ | |
1819 | ||
1820 | /* We're back */ | |
1821 | signal (SIGTSTP, onsusp); | |
1822 | set_tty (); | |
1823 | if (inwait) | |
1824 | longjmp (restore); | |
1825 | } |