1 |
|
|
/* |
2 |
|
|
* Copyright (C) 1984-2012 Mark Nudelman |
3 |
|
|
* Modified for use with illumos by Garrett D'Amore. |
4 |
|
|
* Copyright 2014 Garrett D'Amore <garrett@damore.org> |
5 |
|
|
* |
6 |
|
|
* You may distribute under the terms of either the GNU General Public |
7 |
|
|
* License or the Less License, as specified in the README file. |
8 |
|
|
* |
9 |
|
|
* For more information, see the README file. |
10 |
|
|
*/ |
11 |
|
|
|
12 |
|
|
/* |
13 |
|
|
* Handling functions for command line options. |
14 |
|
|
* |
15 |
|
|
* Most options are handled by the generic code in option.c. |
16 |
|
|
* But all string options, and a few non-string options, require |
17 |
|
|
* special handling specific to the particular option. |
18 |
|
|
* This special processing is done by the "handling functions" in this file. |
19 |
|
|
* |
20 |
|
|
* Each handling function is passed a "type" and, if it is a string |
21 |
|
|
* option, the string which should be "assigned" to the option. |
22 |
|
|
* The type may be one of: |
23 |
|
|
* INIT The option is being initialized from the command line. |
24 |
|
|
* TOGGLE The option is being changed from within the program. |
25 |
|
|
* QUERY The setting of the option is merely being queried. |
26 |
|
|
*/ |
27 |
|
|
|
28 |
|
|
#include "less.h" |
29 |
|
|
#include "option.h" |
30 |
|
|
|
31 |
|
|
extern int bufspace; |
32 |
|
|
extern int pr_type; |
33 |
|
|
extern int plusoption; |
34 |
|
|
extern int swindow; |
35 |
|
|
extern int sc_width; |
36 |
|
|
extern int sc_height; |
37 |
|
|
extern int secure; |
38 |
|
|
extern int dohelp; |
39 |
|
|
extern int any_display; |
40 |
|
|
extern char openquote; |
41 |
|
|
extern char closequote; |
42 |
|
|
extern char *prproto[]; |
43 |
|
|
extern char *eqproto; |
44 |
|
|
extern char *hproto; |
45 |
|
|
extern char *wproto; |
46 |
|
|
extern IFILE curr_ifile; |
47 |
|
|
extern char version[]; |
48 |
|
|
extern int jump_sline; |
49 |
|
|
extern int jump_sline_fraction; |
50 |
|
|
extern int less_is_more; |
51 |
|
|
extern char *namelogfile; |
52 |
|
|
extern int force_logfile; |
53 |
|
|
extern int logfile; |
54 |
|
|
char *tagoption = NULL; |
55 |
|
|
extern char *tags; |
56 |
|
|
|
57 |
|
|
int shift_count; /* Number of positions to shift horizontally */ |
58 |
|
|
static int shift_count_fraction = -1; |
59 |
|
|
|
60 |
|
|
/* |
61 |
|
|
* Handler for -o option. |
62 |
|
|
*/ |
63 |
|
|
void |
64 |
|
|
opt_o(int type, char *s) |
65 |
|
|
{ |
66 |
|
|
PARG parg; |
67 |
|
|
|
68 |
|
|
if (secure) { |
69 |
|
|
error("log file support is not available", NULL); |
70 |
|
|
return; |
71 |
|
|
} |
72 |
|
|
switch (type) { |
73 |
|
|
case INIT: |
74 |
|
|
namelogfile = s; |
75 |
|
|
break; |
76 |
|
|
case TOGGLE: |
77 |
|
|
if (ch_getflags() & CH_CANSEEK) { |
78 |
|
|
error("Input is not a pipe", NULL); |
79 |
|
|
return; |
80 |
|
|
} |
81 |
|
|
if (logfile >= 0) { |
82 |
|
|
error("Log file is already in use", NULL); |
83 |
|
|
return; |
84 |
|
|
} |
85 |
|
|
s = skipsp(s); |
86 |
|
|
namelogfile = lglob(s); |
87 |
|
|
use_logfile(namelogfile); |
88 |
|
|
sync_logfile(); |
89 |
|
|
break; |
90 |
|
|
case QUERY: |
91 |
|
|
if (logfile < 0) { |
92 |
|
|
error("No log file", NULL); |
93 |
|
|
} else { |
94 |
|
|
parg.p_string = namelogfile; |
95 |
|
|
error("Log file \"%s\"", &parg); |
96 |
|
|
} |
97 |
|
|
break; |
98 |
|
|
} |
99 |
|
|
} |
100 |
|
|
|
101 |
|
|
/* |
102 |
|
|
* Handler for -O option. |
103 |
|
|
*/ |
104 |
|
|
void |
105 |
|
|
opt__O(int type, char *s) |
106 |
|
|
{ |
107 |
|
|
force_logfile = TRUE; |
108 |
|
|
opt_o(type, s); |
109 |
|
|
} |
110 |
|
|
|
111 |
|
|
/* |
112 |
|
|
* Handlers for -j option. |
113 |
|
|
*/ |
114 |
|
|
void |
115 |
|
|
opt_j(int type, char *s) |
116 |
|
|
{ |
117 |
|
|
PARG parg; |
118 |
|
|
char buf[16]; |
119 |
|
|
int len; |
120 |
|
|
int err; |
121 |
|
|
|
122 |
|
|
switch (type) { |
123 |
|
|
case INIT: |
124 |
|
|
case TOGGLE: |
125 |
|
|
if (*s == '.') { |
126 |
|
|
s++; |
127 |
|
|
jump_sline_fraction = getfraction(&s, "j", &err); |
128 |
|
|
if (err) |
129 |
|
|
error("Invalid line fraction", NULL); |
130 |
|
|
else |
131 |
|
|
calc_jump_sline(); |
132 |
|
|
} else { |
133 |
|
|
int sline = getnum(&s, "j", &err); |
134 |
|
|
if (err) { |
135 |
|
|
error("Invalid line number", NULL); |
136 |
|
|
} else { |
137 |
|
|
jump_sline = sline; |
138 |
|
|
jump_sline_fraction = -1; |
139 |
|
|
} |
140 |
|
|
} |
141 |
|
|
break; |
142 |
|
|
case QUERY: |
143 |
|
|
if (jump_sline_fraction < 0) { |
144 |
|
|
parg.p_int = jump_sline; |
145 |
|
|
error("Position target at screen line %d", &parg); |
146 |
|
|
} else { |
147 |
|
|
(void) snprintf(buf, sizeof (buf), ".%06d", |
148 |
|
|
jump_sline_fraction); |
149 |
|
|
len = strlen(buf); |
150 |
|
|
while (len > 2 && buf[len-1] == '0') |
151 |
|
|
len--; |
152 |
|
|
buf[len] = '\0'; |
153 |
|
|
parg.p_string = buf; |
154 |
|
|
error("Position target at screen position %s", &parg); |
155 |
|
|
} |
156 |
|
|
break; |
157 |
|
|
} |
158 |
|
|
} |
159 |
|
|
|
160 |
|
|
void |
161 |
|
|
calc_jump_sline(void) |
162 |
|
|
{ |
163 |
|
|
if (jump_sline_fraction < 0) |
164 |
|
|
return; |
165 |
|
|
jump_sline = sc_height * jump_sline_fraction / NUM_FRAC_DENOM; |
166 |
|
|
} |
167 |
|
|
|
168 |
|
|
/* |
169 |
|
|
* Handlers for -# option. |
170 |
|
|
*/ |
171 |
|
|
void |
172 |
|
|
opt_shift(int type, char *s) |
173 |
|
|
{ |
174 |
|
|
PARG parg; |
175 |
|
|
char buf[16]; |
176 |
|
|
int len; |
177 |
|
|
int err; |
178 |
|
|
|
179 |
|
|
switch (type) { |
180 |
|
|
case INIT: |
181 |
|
|
case TOGGLE: |
182 |
|
|
if (*s == '.') { |
183 |
|
|
s++; |
184 |
|
|
shift_count_fraction = getfraction(&s, "#", &err); |
185 |
|
|
if (err) |
186 |
|
|
error("Invalid column fraction", NULL); |
187 |
|
|
else |
188 |
|
|
calc_shift_count(); |
189 |
|
|
} else { |
190 |
|
|
int hs = getnum(&s, "#", &err); |
191 |
|
|
if (err) { |
192 |
|
|
error("Invalid column number", NULL); |
193 |
|
|
} else { |
194 |
|
|
shift_count = hs; |
195 |
|
|
shift_count_fraction = -1; |
196 |
|
|
} |
197 |
|
|
} |
198 |
|
|
break; |
199 |
|
|
case QUERY: |
200 |
|
|
if (shift_count_fraction < 0) { |
201 |
|
|
parg.p_int = shift_count; |
202 |
|
|
error("Horizontal shift %d columns", &parg); |
203 |
|
|
} else { |
204 |
|
|
|
205 |
|
|
(void) snprintf(buf, sizeof (buf), ".%06d", |
206 |
|
|
shift_count_fraction); |
207 |
|
|
len = strlen(buf); |
208 |
|
|
while (len > 2 && buf[len-1] == '0') |
209 |
|
|
len--; |
210 |
|
|
buf[len] = '\0'; |
211 |
|
|
parg.p_string = buf; |
212 |
|
|
error("Horizontal shift %s of screen width", &parg); |
213 |
|
|
} |
214 |
|
|
break; |
215 |
|
|
} |
216 |
|
|
} |
217 |
|
|
|
218 |
|
|
void |
219 |
|
|
calc_shift_count(void) |
220 |
|
|
{ |
221 |
|
|
if (shift_count_fraction < 0) |
222 |
|
|
return; |
223 |
|
|
shift_count = sc_width * shift_count_fraction / NUM_FRAC_DENOM; |
224 |
|
|
} |
225 |
|
|
|
226 |
|
|
void |
227 |
|
|
opt_k(int type, char *s) |
228 |
|
|
{ |
229 |
|
|
PARG parg; |
230 |
|
|
|
231 |
|
|
switch (type) { |
232 |
|
|
case INIT: |
233 |
|
|
if (lesskey(s, 0)) { |
234 |
|
|
parg.p_string = s; |
235 |
|
|
error("Cannot use lesskey file \"%s\"", &parg); |
236 |
|
|
} |
237 |
|
|
break; |
238 |
|
|
} |
239 |
|
|
} |
240 |
|
|
|
241 |
|
|
/* |
242 |
|
|
* Handler for -t option. |
243 |
|
|
*/ |
244 |
|
|
void |
245 |
|
|
opt_t(int type, char *s) |
246 |
|
|
{ |
247 |
|
|
IFILE save_ifile; |
248 |
|
|
off_t pos; |
249 |
|
|
|
250 |
|
|
switch (type) { |
251 |
|
|
case INIT: |
252 |
|
|
tagoption = s; |
253 |
|
|
/* Do the rest in main() */ |
254 |
|
|
break; |
255 |
|
|
case TOGGLE: |
256 |
|
|
if (secure) { |
257 |
|
|
error("tags support is not available", NULL); |
258 |
|
|
break; |
259 |
|
|
} |
260 |
|
|
findtag(skipsp(s)); |
261 |
|
|
save_ifile = save_curr_ifile(); |
262 |
|
|
/* |
263 |
|
|
* Try to open the file containing the tag |
264 |
|
|
* and search for the tag in that file. |
265 |
|
|
*/ |
266 |
|
|
if (edit_tagfile() || (pos = tagsearch()) == -1) { |
267 |
|
|
/* Failed: reopen the old file. */ |
268 |
|
|
reedit_ifile(save_ifile); |
269 |
|
|
break; |
270 |
|
|
} |
271 |
|
|
unsave_ifile(save_ifile); |
272 |
|
|
jump_loc(pos, jump_sline); |
273 |
|
|
break; |
274 |
|
|
} |
275 |
|
|
} |
276 |
|
|
|
277 |
|
|
/* |
278 |
|
|
* Handler for -T option. |
279 |
|
|
*/ |
280 |
|
|
void |
281 |
|
|
opt__T(int type, char *s) |
282 |
|
|
{ |
283 |
|
|
PARG parg; |
284 |
|
|
|
285 |
|
|
switch (type) { |
286 |
|
|
case INIT: |
287 |
|
|
tags = s; |
288 |
|
|
break; |
289 |
|
|
case TOGGLE: |
290 |
|
|
s = skipsp(s); |
291 |
|
|
tags = lglob(s); |
292 |
|
|
break; |
293 |
|
|
case QUERY: |
294 |
|
|
parg.p_string = tags; |
295 |
|
|
error("Tags file \"%s\"", &parg); |
296 |
|
|
break; |
297 |
|
|
} |
298 |
|
|
} |
299 |
|
|
|
300 |
|
|
/* |
301 |
|
|
* Handler for -p option. |
302 |
|
|
*/ |
303 |
|
|
void |
304 |
|
|
opt_p(int type, char *s) |
305 |
|
|
{ |
306 |
|
|
switch (type) { |
307 |
|
|
case INIT: |
308 |
|
|
/* |
309 |
|
|
* Unget a search command for the specified string. |
310 |
|
|
* {{ This won't work if the "/" command is |
311 |
|
|
* changed or invalidated by a .lesskey file. }} |
312 |
|
|
*/ |
313 |
|
|
plusoption = TRUE; |
314 |
|
|
ungetsc(s); |
315 |
|
|
/* |
316 |
|
|
* In "more" mode, the -p argument is a command, |
317 |
|
|
* not a search string, so we don't need a slash. |
318 |
|
|
*/ |
319 |
|
|
if (!less_is_more) |
320 |
|
|
ungetsc("/"); |
321 |
|
|
break; |
322 |
|
|
} |
323 |
|
|
} |
324 |
|
|
|
325 |
|
|
/* |
326 |
|
|
* Handler for -P option. |
327 |
|
|
*/ |
328 |
|
|
void |
329 |
|
|
opt__P(int type, char *s) |
330 |
|
|
{ |
331 |
|
|
char **proto; |
332 |
|
|
PARG parg; |
333 |
|
|
|
334 |
|
|
switch (type) { |
335 |
|
|
case INIT: |
336 |
|
|
case TOGGLE: |
337 |
|
|
/* |
338 |
|
|
* Figure out which prototype string should be changed. |
339 |
|
|
*/ |
340 |
|
|
switch (*s) { |
341 |
|
|
case 's': proto = &prproto[PR_SHORT]; s++; break; |
342 |
|
|
case 'm': proto = &prproto[PR_MEDIUM]; s++; break; |
343 |
|
|
case 'M': proto = &prproto[PR_LONG]; s++; break; |
344 |
|
|
case '=': proto = &eqproto; s++; break; |
345 |
|
|
case 'h': proto = &hproto; s++; break; |
346 |
|
|
case 'w': proto = &wproto; s++; break; |
347 |
|
|
default: proto = &prproto[PR_SHORT]; break; |
348 |
|
|
} |
349 |
|
|
free(*proto); |
350 |
|
|
*proto = estrdup(s); |
351 |
|
|
break; |
352 |
|
|
case QUERY: |
353 |
|
|
parg.p_string = prproto[pr_type]; |
354 |
|
|
error("%s", &parg); |
355 |
|
|
break; |
356 |
|
|
} |
357 |
|
|
} |
358 |
|
|
|
359 |
|
|
/* |
360 |
|
|
* Handler for the -b option. |
361 |
|
|
*/ |
362 |
|
|
void |
363 |
|
|
opt_b(int type, char *s) |
364 |
|
|
{ |
365 |
✗✓✓ |
24 |
switch (type) { |
366 |
|
|
case INIT: |
367 |
|
|
case TOGGLE: |
368 |
|
|
/* |
369 |
|
|
* Set the new number of buffers. |
370 |
|
|
*/ |
371 |
|
8 |
ch_setbufspace(bufspace); |
372 |
|
8 |
break; |
373 |
|
|
case QUERY: |
374 |
|
|
break; |
375 |
|
|
} |
376 |
|
8 |
} |
377 |
|
|
|
378 |
|
|
/* |
379 |
|
|
* Handler for the -i option. |
380 |
|
|
*/ |
381 |
|
|
void |
382 |
|
|
opt_i(int type, char *s) |
383 |
|
|
{ |
384 |
|
|
switch (type) { |
385 |
|
|
case TOGGLE: |
386 |
|
|
chg_caseless(); |
387 |
|
|
break; |
388 |
|
|
case QUERY: |
389 |
|
|
case INIT: |
390 |
|
|
break; |
391 |
|
|
} |
392 |
|
|
} |
393 |
|
|
|
394 |
|
|
/* |
395 |
|
|
* Handler for the -V option. |
396 |
|
|
*/ |
397 |
|
|
void |
398 |
|
|
opt__V(int type, char *s) |
399 |
|
|
{ |
400 |
|
|
switch (type) { |
401 |
|
|
case TOGGLE: |
402 |
|
|
case QUERY: |
403 |
|
|
dispversion(); |
404 |
|
|
break; |
405 |
|
|
case INIT: |
406 |
|
|
/* |
407 |
|
|
* Force output to stdout per GNU standard for --version output. |
408 |
|
|
*/ |
409 |
|
|
any_display = 1; |
410 |
|
|
putstr("less "); |
411 |
|
|
putstr(version); |
412 |
|
|
putstr(" ("); |
413 |
|
|
putstr("POSIX "); |
414 |
|
|
putstr("regular expressions)\n"); |
415 |
|
|
putstr("Copyright (C) 1984-2012 Mark Nudelman\n"); |
416 |
|
|
putstr("Modified for use with illumos by Garrett D'Amore.\n"); |
417 |
|
|
putstr("Copyright 2014 Garrett D'Amore\n\n"); |
418 |
|
|
putstr("less comes with NO WARRANTY, "); |
419 |
|
|
putstr("to the extent permitted by law.\n"); |
420 |
|
|
putstr("For information about the terms of redistribution,\n"); |
421 |
|
|
putstr("see the file named README in the less distribution.\n"); |
422 |
|
|
putstr("Homepage: http://www.greenwoodsoftware.com/less\n"); |
423 |
|
|
putstr("\n"); |
424 |
|
|
quit(QUIT_OK); |
425 |
|
|
break; |
426 |
|
|
} |
427 |
|
|
} |
428 |
|
|
|
429 |
|
|
/* |
430 |
|
|
* Handler for the -x option. |
431 |
|
|
*/ |
432 |
|
|
void |
433 |
|
|
opt_x(int type, char *s) |
434 |
|
|
{ |
435 |
|
|
extern int tabstops[]; |
436 |
|
|
extern int ntabstops; |
437 |
|
|
extern int tabdefault; |
438 |
|
|
char tabs[60+(4*TABSTOP_MAX)]; |
439 |
|
|
int i; |
440 |
|
|
PARG p; |
441 |
|
|
|
442 |
|
|
switch (type) { |
443 |
|
|
case INIT: |
444 |
|
|
case TOGGLE: |
445 |
|
|
/* Start at 1 because tabstops[0] is always zero. */ |
446 |
|
|
for (i = 1; i < TABSTOP_MAX; ) { |
447 |
|
|
int n = 0; |
448 |
|
|
s = skipsp(s); |
449 |
|
|
while (*s >= '0' && *s <= '9') |
450 |
|
|
n = (10 * n) + (*s++ - '0'); |
451 |
|
|
if (n > tabstops[i-1]) |
452 |
|
|
tabstops[i++] = n; |
453 |
|
|
s = skipsp(s); |
454 |
|
|
if (*s++ != ',') |
455 |
|
|
break; |
456 |
|
|
} |
457 |
|
|
if (i < 2) |
458 |
|
|
return; |
459 |
|
|
ntabstops = i; |
460 |
|
|
tabdefault = tabstops[ntabstops-1] - tabstops[ntabstops-2]; |
461 |
|
|
break; |
462 |
|
|
case QUERY: |
463 |
|
|
(void) strlcpy(tabs, "Tab stops ", sizeof(tabs)); |
464 |
|
|
if (ntabstops > 2) { |
465 |
|
|
for (i = 1; i < ntabstops; i++) { |
466 |
|
|
if (i > 1) |
467 |
|
|
strlcat(tabs, ",", sizeof(tabs)); |
468 |
|
|
(void) snprintf(tabs+strlen(tabs), |
469 |
|
|
sizeof(tabs)-strlen(tabs), |
470 |
|
|
"%d", tabstops[i]); |
471 |
|
|
} |
472 |
|
|
(void) snprintf(tabs+strlen(tabs), |
473 |
|
|
sizeof(tabs)-strlen(tabs), " and then "); |
474 |
|
|
} |
475 |
|
|
(void) snprintf(tabs+strlen(tabs), sizeof(tabs)-strlen(tabs), |
476 |
|
|
"every %d spaces", tabdefault); |
477 |
|
|
p.p_string = tabs; |
478 |
|
|
error("%s", &p); |
479 |
|
|
break; |
480 |
|
|
} |
481 |
|
|
} |
482 |
|
|
|
483 |
|
|
|
484 |
|
|
/* |
485 |
|
|
* Handler for the -" option. |
486 |
|
|
*/ |
487 |
|
|
void |
488 |
|
|
opt_quote(int type, char *s) |
489 |
|
|
{ |
490 |
|
|
char buf[3]; |
491 |
|
|
PARG parg; |
492 |
|
|
|
493 |
|
|
switch (type) { |
494 |
|
|
case INIT: |
495 |
|
|
case TOGGLE: |
496 |
|
|
if (s[0] == '\0') { |
497 |
|
|
openquote = closequote = '\0'; |
498 |
|
|
break; |
499 |
|
|
} |
500 |
|
|
if (s[1] != '\0' && s[2] != '\0') { |
501 |
|
|
error("-\" must be followed by 1 or 2 chars", |
502 |
|
|
NULL); |
503 |
|
|
return; |
504 |
|
|
} |
505 |
|
|
openquote = s[0]; |
506 |
|
|
if (s[1] == '\0') |
507 |
|
|
closequote = openquote; |
508 |
|
|
else |
509 |
|
|
closequote = s[1]; |
510 |
|
|
break; |
511 |
|
|
case QUERY: |
512 |
|
|
buf[0] = openquote; |
513 |
|
|
buf[1] = closequote; |
514 |
|
|
buf[2] = '\0'; |
515 |
|
|
parg.p_string = buf; |
516 |
|
|
error("quotes %s", &parg); |
517 |
|
|
break; |
518 |
|
|
} |
519 |
|
|
} |
520 |
|
|
|
521 |
|
|
/* |
522 |
|
|
* "-?" means display a help message. |
523 |
|
|
* If from the command line, exit immediately. |
524 |
|
|
*/ |
525 |
|
|
void |
526 |
|
|
opt_query(int type, char *s) |
527 |
|
|
{ |
528 |
|
|
switch (type) { |
529 |
|
|
case QUERY: |
530 |
|
|
case TOGGLE: |
531 |
|
|
error("Use \"h\" for help", NULL); |
532 |
|
|
break; |
533 |
|
|
case INIT: |
534 |
|
|
dohelp = 1; |
535 |
|
|
} |
536 |
|
|
} |
537 |
|
|
|
538 |
|
|
/* |
539 |
|
|
* Get the "screen window" size. |
540 |
|
|
*/ |
541 |
|
|
int |
542 |
|
|
get_swindow(void) |
543 |
|
|
{ |
544 |
✗✓ |
64 |
if (swindow > 0) |
545 |
|
|
return (swindow); |
546 |
|
32 |
return (sc_height + swindow); |
547 |
|
32 |
} |