xref: /openbsd/usr.bin/vi/common/options.c (revision 211058df)
1 /*	$OpenBSD: options.c,v 1.30 2024/02/12 16:42:42 job Exp $	*/
2 
3 /*-
4  * Copyright (c) 1991, 1993, 1994
5  *	The Regents of the University of California.  All rights reserved.
6  * Copyright (c) 1991, 1993, 1994, 1995, 1996
7  *	Keith Bostic.  All rights reserved.
8  *
9  * See the LICENSE file for redistribution information.
10  */
11 
12 #include "config.h"
13 
14 #include <sys/types.h>
15 #include <sys/queue.h>
16 #include <sys/stat.h>
17 #include <sys/time.h>
18 
19 #include <bitstring.h>
20 #include <ctype.h>
21 #include <errno.h>
22 #include <limits.h>
23 #include <paths.h>
24 #include <stdio.h>
25 #include <stdlib.h>
26 #include <string.h>
27 #include <unistd.h>
28 
29 #include "common.h"
30 #include "../vi/vi.h"
31 #include "pathnames.h"
32 
33 static int	 	 opts_abbcmp(const void *, const void *);
34 static int	 	 opts_cmp(const void *, const void *);
35 static int	 	 opts_print(SCR *, OPTLIST const *);
36 
37 /*
38  * O'Reilly noted options and abbreviations are from "Learning the VI Editor",
39  * Fifth Edition, May 1992.  There's no way of knowing what systems they are
40  * actually from.
41  *
42  * HPUX noted options and abbreviations are from "The Ultimate Guide to the
43  * VI and EX Text Editors", 1990.
44  */
45 OPTLIST const optlist[] = {
46 /* O_ALTWERASE	  4.4BSD */
47 	{"altwerase",	f_altwerase,	OPT_0BOOL,	0},
48 /* O_AUTOINDENT	    4BSD */
49 	{"autoindent",	NULL,		OPT_0BOOL,	0},
50 /* O_AUTOPRINT	    4BSD */
51 	{"autoprint",	NULL,		OPT_1BOOL,	0},
52 /* O_AUTOWRITE	    4BSD */
53 	{"autowrite",	NULL,		OPT_0BOOL,	0},
54 /* O_BACKUP	  4.4BSD */
55 	{"backup",	NULL,		OPT_STR,	0},
56 /* O_BEAUTIFY	    4BSD */
57 	{"beautify",	NULL,		OPT_0BOOL,	0},
58 /* O_CDPATH	  4.4BSD */
59 	{"cdpath",	NULL,		OPT_STR,	0},
60 /* O_CEDIT	  4.4BSD */
61 	{"cedit",	NULL,		OPT_STR,	0},
62 /* O_COLUMNS	  4.4BSD */
63 	{"columns",	f_columns,	OPT_NUM,	OPT_NOSAVE},
64 /* O_COMMENT	  4.4BSD */
65 	{"comment",	NULL,		OPT_0BOOL,	0},
66 /* O_EDCOMPATIBLE   4BSD */
67 	{"edcompatible",NULL,		OPT_0BOOL,	0},
68 /* O_ESCAPETIME	  4.4BSD */
69 	{"escapetime",	NULL,		OPT_NUM,	0},
70 /* O_ERRORBELLS	    4BSD */
71 	{"errorbells",	NULL,		OPT_0BOOL,	0},
72 /* O_EXPANDTAB	    NetBSD 5.0 */
73 	{"expandtab",	NULL,		OPT_0BOOL,	0},
74 /* O_EXRC	System V (undocumented) */
75 	{"exrc",	NULL,		OPT_0BOOL,	0},
76 /* O_EXTENDED	  4.4BSD */
77 	{"extended",	f_recompile,	OPT_0BOOL,	0},
78 /* O_FILEC	  4.4BSD */
79 	{"filec",	NULL,		OPT_STR,	0},
80 /* O_FLASH	    HPUX */
81 	{"flash",	NULL,		OPT_0BOOL,	0},
82 /* O_HARDTABS	    4BSD */
83 	{"hardtabs",	NULL,		OPT_NUM,	0},
84 /* O_ICLOWER	  4.4BSD */
85 	{"iclower",	f_recompile,	OPT_0BOOL,	0},
86 /* O_IGNORECASE	    4BSD */
87 	{"ignorecase",	f_recompile,	OPT_0BOOL,	0},
88 /* O_KEYTIME	  4.4BSD */
89 	{"keytime",	NULL,		OPT_NUM,	0},
90 /* O_LEFTRIGHT	  4.4BSD */
91 	{"leftright",	f_reformat,	OPT_0BOOL,	0},
92 /* O_LINES	  4.4BSD */
93 	{"lines",	f_lines,	OPT_NUM,	OPT_NOSAVE},
94 /* O_LIST	    4BSD */
95 	{"list",	f_reformat,	OPT_0BOOL,	0},
96 /* O_LOCKFILES	  4.4BSD
97  *	XXX
98  *	Locking isn't reliable enough over NFS to require it, in addition,
99  *	it's a serious startup performance problem over some remote links.
100  */
101 	{"lock",	NULL,		OPT_1BOOL,	0},
102 /* O_MAGIC	    4BSD */
103 	{"magic",	NULL,		OPT_1BOOL,	0},
104 /* O_MATCHTIME	  4.4BSD */
105 	{"matchtime",	NULL,		OPT_NUM,	0},
106 /* O_MESG	    4BSD */
107 	{"mesg",	NULL,		OPT_1BOOL,	0},
108 /* O_NOPRINT	  4.4BSD */
109 	{"noprint",	f_print,	OPT_STR,	OPT_EARLYSET},
110 /* O_NUMBER	    4BSD */
111 	{"number",	f_reformat,	OPT_0BOOL,	0},
112 /* O_OCTAL	  4.4BSD */
113 	{"octal",	f_print,	OPT_0BOOL,	OPT_EARLYSET},
114 /* O_OPEN	    4BSD */
115 	{"open",	NULL,		OPT_1BOOL,	0},
116 /* O_PARAGRAPHS	    4BSD */
117 	{"paragraphs",	f_paragraph,	OPT_STR,	0},
118 /* O_PATH	  4.4BSD */
119 	{"path",	NULL,		OPT_STR,	0},
120 /* O_PRINT	  4.4BSD */
121 	{"print",	f_print,	OPT_STR,	OPT_EARLYSET},
122 /* O_PROMPT	    4BSD */
123 	{"prompt",	NULL,		OPT_1BOOL,	0},
124 /* O_READONLY	    4BSD (undocumented) */
125 	{"readonly",	f_readonly,	OPT_0BOOL,	OPT_ALWAYS},
126 /* O_RECDIR	  4.4BSD */
127 	{"recdir",	NULL,		OPT_STR,	0},
128 /* O_REMAP	    4BSD */
129 	{"remap",	NULL,		OPT_1BOOL,	0},
130 /* O_REPORT	    4BSD */
131 	{"report",	NULL,		OPT_NUM,	0},
132 /* O_RULER	  4.4BSD */
133 	{"ruler",	NULL,		OPT_0BOOL,	0},
134 /* O_SCROLL	    4BSD */
135 	{"scroll",	NULL,		OPT_NUM,	0},
136 /* O_SEARCHINCR	  4.4BSD */
137 	{"searchincr",	NULL,		OPT_0BOOL,	0},
138 /* O_SECTIONS	    4BSD */
139 	{"sections",	f_section,	OPT_STR,	0},
140 /* O_SECURE	  4.4BSD */
141 	{"secure",	f_secure,	OPT_0BOOL,	OPT_NOUNSET},
142 /* O_SHELL	    4BSD */
143 	{"shell",	NULL,		OPT_STR,	0},
144 /* O_SHELLMETA	  4.4BSD */
145 	{"shellmeta",	NULL,		OPT_STR,	0},
146 /* O_SHIFTWIDTH	    4BSD */
147 	{"shiftwidth",	NULL,		OPT_NUM,	OPT_NOZERO},
148 /* O_SHOWFILENAME */
149 	{"showfilename",NULL,		OPT_0BOOL,	0},
150 /* O_SHOWMATCH	    4BSD */
151 	{"showmatch",	NULL,		OPT_0BOOL,	0},
152 /* O_SHOWMODE	  4.4BSD */
153 	{"showmode",	NULL,		OPT_0BOOL,	0},
154 /* O_SIDESCROLL	  4.4BSD */
155 	{"sidescroll",	NULL,		OPT_NUM,	OPT_NOZERO},
156 /* O_TABSTOP	    4BSD */
157 	{"tabstop",	f_reformat,	OPT_NUM,	OPT_NOZERO},
158 /* O_TAGLENGTH	    4BSD */
159 	{"taglength",	NULL,		OPT_NUM,	0},
160 /* O_TAGS	    4BSD */
161 	{"tags",	NULL,		OPT_STR,	0},
162 /* O_TERM	    4BSD
163  *	!!!
164  *	By default, the historic vi always displayed information about two
165  *	options, redraw and term.  Term seems sufficient.
166  */
167 	{"term",	NULL,		OPT_STR,	OPT_ADISP|OPT_NOSAVE},
168 /* O_TERSE	    4BSD */
169 	{"terse",	NULL,		OPT_0BOOL,	0},
170 /* O_TILDEOP      4.4BSD */
171 	{"tildeop",	NULL,		OPT_0BOOL,	0},
172 /* O_TIMEOUT	    4BSD (undocumented) */
173 	{"timeout",	NULL,		OPT_1BOOL,	0},
174 /* O_TTYWERASE	  4.4BSD */
175 	{"ttywerase",	f_ttywerase,	OPT_0BOOL,	0},
176 /* O_VERBOSE	  4.4BSD */
177 	{"verbose",	NULL,		OPT_0BOOL,	0},
178 /* O_W1200	    4BSD */
179 	{"w1200",	f_w1200,	OPT_NUM,	OPT_NDISP|OPT_NOSAVE},
180 /* O_W300	    4BSD */
181 	{"w300",	f_w300,		OPT_NUM,	OPT_NDISP|OPT_NOSAVE},
182 /* O_W9600	    4BSD */
183 	{"w9600",	f_w9600,	OPT_NUM,	OPT_NDISP|OPT_NOSAVE},
184 /* O_WARN	    4BSD */
185 	{"warn",	NULL,		OPT_1BOOL,	0},
186 /* O_WINDOW	    4BSD */
187 	{"window",	f_window,	OPT_NUM,	OPT_NOZERO},
188 /* O_WINDOWNAME	    4BSD */
189 	{"windowname",	NULL,		OPT_0BOOL,	0},
190 /* O_WRAPLEN	  4.4BSD */
191 	{"wraplen",	NULL,		OPT_NUM,	0},
192 /* O_WRAPMARGIN	    4BSD */
193 	{"wrapmargin",	NULL,		OPT_NUM,	0},
194 /* O_WRAPSCAN	    4BSD */
195 	{"wrapscan",	NULL,		OPT_1BOOL,	0},
196 /* O_WRITEANY	    4BSD */
197 	{"writeany",	NULL,		OPT_0BOOL,	0},
198 	{NULL},
199 };
200 
201 typedef struct abbrev {
202         char *name;
203         int offset;
204 } OABBREV;
205 
206 static OABBREV const abbrev[] = {
207 	{"ai",		O_AUTOINDENT},		/*     4BSD */
208 	{"ap",		O_AUTOPRINT},		/*     4BSD */
209 	{"aw",		O_AUTOWRITE},		/*     4BSD */
210 	{"bf",		O_BEAUTIFY},		/*     4BSD */
211 	{"co",		O_COLUMNS},		/*   4.4BSD */
212 	{"eb",		O_ERRORBELLS},		/*     4BSD */
213 	{"ed",		O_EDCOMPATIBLE},	/*     4BSD */
214 	{"et",		O_EXPANDTAB},		/* NetBSD 5.0 */
215 	{"ex",		O_EXRC},		/* System V (undocumented) */
216 	{"ht",		O_HARDTABS},		/*     4BSD */
217 	{"ic",		O_IGNORECASE},		/*     4BSD */
218 	{"li",		O_LINES},		/*   4.4BSD */
219 	{"nu",		O_NUMBER},		/*     4BSD */
220 	{"para",	O_PARAGRAPHS},		/*     4BSD */
221 	{"ro",		O_READONLY},		/*     4BSD (undocumented) */
222 	{"scr",		O_SCROLL},		/*     4BSD (undocumented) */
223 	{"sect",	O_SECTIONS},		/* O'Reilly */
224 	{"sh",		O_SHELL},		/*     4BSD */
225 	{"sm",		O_SHOWMATCH},		/*     4BSD */
226 	{"smd",		O_SHOWMODE},		/*     4BSD */
227 	{"sw",		O_SHIFTWIDTH},		/*     4BSD */
228 	{"tag",		O_TAGS},		/*     4BSD (undocumented) */
229 	{"tl",		O_TAGLENGTH},		/*     4BSD */
230 	{"to",		O_TIMEOUT},		/*     4BSD (undocumented) */
231 	{"ts",		O_TABSTOP},		/*     4BSD */
232 	{"tty",		O_TERM},		/*     4BSD (undocumented) */
233 	{"ttytype",	O_TERM},		/*     4BSD (undocumented) */
234 	{"w",		O_WINDOW},		/* O'Reilly */
235 	{"wa",		O_WRITEANY},		/*     4BSD */
236 	{"wi",		O_WINDOW},		/*     4BSD (undocumented) */
237 	{"wl",		O_WRAPLEN},		/*   4.4BSD */
238 	{"wm",		O_WRAPMARGIN},		/*     4BSD */
239 	{"ws",		O_WRAPSCAN},		/*     4BSD */
240 	{NULL},
241 };
242 
243 /*
244  * opts_init --
245  *	Initialize some of the options.
246  *
247  * PUBLIC: int opts_init(SCR *, int *);
248  */
249 int
opts_init(SCR * sp,int * oargs)250 opts_init(SCR *sp, int *oargs)
251 {
252 	ARGS *argv[2], a, b;
253 	OPTLIST const *op;
254 	u_long v;
255 	int optindx;
256 	char *s, b1[1024];
257 
258 	a.bp = b1;
259 	b.bp = NULL;
260 	a.len = b.len = 0;
261 	argv[0] = &a;
262 	argv[1] = &b;
263 
264 	/* Set numeric and string default values. */
265 #define OI_b1(indx) {							\
266 	a.len = strlen(b1);						\
267 	if (opts_set(sp, argv, NULL)) {					\
268 		optindx = indx;						\
269 		goto err;						\
270 	}								\
271 }
272 #define	OI(indx, str) {							\
273 	(void)strlcpy(b1, (str), sizeof(b1));				\
274 	OI_b1(indx);							\
275 }
276 
277 	/*
278 	 * Indirect global options to global space.  Specifically, set up
279 	 * terminal, lines, columns first, they're used by other options.
280 	 * Note, don't set the flags until we've set up the indirection.
281 	 */
282 	if (o_set(sp, O_TERM, 0, NULL, GO_TERM)) {
283 		optindx = O_TERM;
284 		goto err;
285 	}
286 	F_SET(&sp->opts[O_TERM], OPT_GLOBAL);
287 	if (o_set(sp, O_LINES, 0, NULL, GO_LINES)) {
288 		optindx = O_LINES;
289 		goto err;
290 	}
291 	F_SET(&sp->opts[O_LINES], OPT_GLOBAL);
292 	if (o_set(sp, O_COLUMNS, 0, NULL, GO_COLUMNS)) {
293 		optindx = O_COLUMNS;
294 		goto err;
295 	}
296 	F_SET(&sp->opts[O_COLUMNS], OPT_GLOBAL);
297 	if (o_set(sp, O_SECURE, 0, NULL, GO_SECURE)) {
298 		optindx = O_SECURE;
299 		goto err;
300 	}
301 	F_SET(&sp->opts[O_SECURE], OPT_GLOBAL);
302 
303 	/* Initialize string values. */
304 	(void)snprintf(b1, sizeof(b1),
305 	    "cdpath=%s", (s = getenv("CDPATH")) == NULL ? ":" : s);
306 	OI_b1(O_CDPATH);
307 	OI(O_ESCAPETIME, "escapetime=1");
308 	OI(O_FILEC, "filec=\t");
309 	OI(O_KEYTIME, "keytime=6");
310 	OI(O_MATCHTIME, "matchtime=7");
311 	OI(O_REPORT, "report=5");
312 	OI(O_PARAGRAPHS, "paragraphs=IPLPPPQPP LIpplpipbpBlBdPpLpIt");
313 	OI(O_PATH, "path=");
314 	(void)snprintf(b1, sizeof(b1), "recdir=%s", _PATH_PRESERVE);
315 	OI_b1(O_RECDIR);
316 	OI(O_SECTIONS, "sections=NHSHH HUnhshShSs");
317 	(void)snprintf(b1, sizeof(b1),
318 	    "shell=%s", (s = getenv("SHELL")) == NULL ? _PATH_BSHELL : s);
319 	OI_b1(O_SHELL);
320 	OI(O_SHELLMETA, "shellmeta=~{[*?$`'\"\\");
321 	OI(O_SHIFTWIDTH, "shiftwidth=8");
322 	OI(O_SIDESCROLL, "sidescroll=16");
323 	OI(O_TABSTOP, "tabstop=8");
324 	(void)snprintf(b1, sizeof(b1), "tags=%s", _PATH_TAGS);
325 	OI_b1(O_TAGS);
326 
327 	/*
328 	 * XXX
329 	 * Initialize O_SCROLL here, after term; initializing term should
330 	 * have created a LINES/COLUMNS value.
331 	 */
332 	if ((v = (O_VAL(sp, O_LINES) - 1) / 2) == 0)
333 		v = 1;
334 	(void)snprintf(b1, sizeof(b1), "scroll=%ld", v);
335 	OI_b1(O_SCROLL);
336 
337 	/*
338 	 * The default window option values are:
339 	 *		8 if baud rate <=  600
340 	 *	       16 if baud rate <= 1200
341 	 *	LINES - 1 if baud rate  > 1200
342 	 *
343 	 * Note, the windows option code will correct any too-large value
344 	 * or when the O_LINES value is 1.
345 	 */
346 	if (sp->gp->scr_baud(sp, &v))
347 		return (1);
348 	if (v <= 600)
349 		v = 8;
350 	else if (v <= 1200)
351 		v = 16;
352 	else
353 		v = O_VAL(sp, O_LINES) - 1;
354 	(void)snprintf(b1, sizeof(b1), "window=%lu", v);
355 	OI_b1(O_WINDOW);
356 
357 	/*
358 	 * Set boolean default values, and copy all settings into the default
359 	 * information.  OS_NOFREE is set, we're copying, not replacing.
360 	 */
361 	for (op = optlist, optindx = 0; op->name != NULL; ++op, ++optindx)
362 		switch (op->type) {
363 		case OPT_0BOOL:
364 			break;
365 		case OPT_1BOOL:
366 			O_SET(sp, optindx);
367 			O_D_SET(sp, optindx);
368 			break;
369 		case OPT_NUM:
370 			o_set(sp, optindx, OS_DEF, NULL, O_VAL(sp, optindx));
371 			break;
372 		case OPT_STR:
373 			if (O_STR(sp, optindx) != NULL && o_set(sp, optindx,
374 			    OS_DEF | OS_NOFREE | OS_STRDUP, O_STR(sp, optindx), 0))
375 				goto err;
376 			break;
377 		default:
378 			abort();
379 		}
380 
381 	/*
382 	 * !!!
383 	 * Some options can be initialized by the command name or the
384 	 * command-line arguments.  They don't set the default values,
385 	 * it's historic practice.
386 	 */
387 	for (; *oargs != -1; ++oargs)
388 		OI(*oargs, optlist[*oargs].name);
389 	return (0);
390 #undef OI
391 #undef OI_b1
392 
393 err:	msgq(sp, M_ERR,
394 	    "Unable to set default %s option", optlist[optindx].name);
395 	return (1);
396 }
397 
398 /*
399  * opts_set --
400  *	Change the values of one or more options.
401  *
402  * PUBLIC: int opts_set(SCR *, ARGS *[], char *);
403  */
404 int
opts_set(SCR * sp,ARGS * argv[],char * usage)405 opts_set(SCR *sp, ARGS *argv[], char *usage)
406 {
407 	enum optdisp disp;
408 	enum nresult nret;
409 	OPTLIST const *op;
410 	OPTION *spo;
411 	u_long value, turnoff;
412 	int ch, equals, nf, nf2, offset, qmark, rval;
413 	char *endp, *name, *p, *sep, *t;
414 
415 	disp = NO_DISPLAY;
416 	for (rval = 0; argv[0]->len != 0; ++argv) {
417 		/*
418 		 * The historic vi dumped the options for each occurrence of
419 		 * "all" in the set list.  Puhleeze.
420 		 */
421 		if (!strcmp(argv[0]->bp, "all")) {
422 			disp = ALL_DISPLAY;
423 			continue;
424 		}
425 
426 		/* Find equals sign or question mark. */
427 		for (sep = NULL, equals = qmark = 0,
428 		    p = name = argv[0]->bp; (ch = *p) != '\0'; ++p)
429 			if (ch == '=' || ch == '?') {
430 				if (p == name) {
431 					if (usage != NULL)
432 						msgq(sp, M_ERR,
433 						    "Usage: %s", usage);
434 					return (1);
435 				}
436 				sep = p;
437 				if (ch == '=')
438 					equals = 1;
439 				else
440 					qmark = 1;
441 				break;
442 			}
443 
444 		turnoff = 0;
445 		op = NULL;
446 		if (sep != NULL)
447 			*sep++ = '\0';
448 
449 		/* Search for the name, then name without any leading "no". */
450 		if ((op = opts_search(name)) == NULL &&
451 		    name[0] == 'n' && name[1] == 'o') {
452 			turnoff = 1;
453 			name += 2;
454 			op = opts_search(name);
455 		}
456 		if (op == NULL) {
457 			opts_nomatch(sp, name);
458 			rval = 1;
459 			continue;
460 		}
461 
462 		/* Find current option values. */
463 		offset = op - optlist;
464 		spo = sp->opts + offset;
465 
466 		/*
467 		 * !!!
468 		 * Historically, the question mark could be a separate
469 		 * argument.
470 		 */
471 		if (!equals && !qmark &&
472 		    argv[1]->len == 1 && argv[1]->bp[0] == '?') {
473 			++argv;
474 			qmark = 1;
475 		}
476 
477 		/* Set name, value. */
478 		switch (op->type) {
479 		case OPT_0BOOL:
480 		case OPT_1BOOL:
481 			/* Some options may not be reset. */
482 			if (F_ISSET(op, OPT_NOUNSET) && turnoff) {
483 				msgq_str(sp, M_ERR, name,
484 			    "set: the %s option may not be turned off");
485 				rval = 1;
486 				break;
487 			}
488 
489 			if (equals) {
490 				msgq_str(sp, M_ERR, name,
491 			    "set: [no]%s option doesn't take a value");
492 				rval = 1;
493 				break;
494 			}
495 			if (qmark) {
496 				if (!disp)
497 					disp = SELECT_DISPLAY;
498 				F_SET(spo, OPT_SELECTED);
499 				break;
500 			}
501 
502 			/*
503 			 * Do nothing if the value is unchanged, the underlying
504 			 * functions can be expensive.
505 			 */
506 			if (!F_ISSET(op, OPT_ALWAYS)) {
507 				if (turnoff) {
508 					if (!O_ISSET(sp, offset))
509 						break;
510 				} else {
511 					if (O_ISSET(sp, offset))
512 						break;
513 				}
514 			}
515 
516 			if (F_ISSET(op, OPT_EARLYSET)) {
517 			    /* Set the value. */
518 			    if (turnoff)
519 				O_CLR(sp, offset);
520 			    else
521 				O_SET(sp, offset);
522 			}
523 
524 			/* Report to subsystems. */
525 			if ((op->func != NULL &&
526 			    op->func(sp, spo, NULL, &turnoff)) ||
527 			    ex_optchange(sp, offset, NULL, &turnoff) ||
528 			    v_optchange(sp, offset, NULL, &turnoff) ||
529 			    sp->gp->scr_optchange(sp, offset, NULL, &turnoff)) {
530 				rval = 1;
531 				break;
532 			}
533 
534 			if (!F_ISSET(op, OPT_EARLYSET)) {
535 			    /* Set the value. */
536 			    if (turnoff)
537 				O_CLR(sp, offset);
538 			    else
539 				O_SET(sp, offset);
540 			}
541 			break;
542 		case OPT_NUM:
543 			if (turnoff) {
544 				msgq_str(sp, M_ERR, name,
545 				    "set: %s option isn't a boolean");
546 				rval = 1;
547 				break;
548 			}
549 			if (qmark || !equals) {
550 				if (!disp)
551 					disp = SELECT_DISPLAY;
552 				F_SET(spo, OPT_SELECTED);
553 				break;
554 			}
555 
556 			if (!isdigit(sep[0]))
557 				goto badnum;
558 			if ((nret =
559 			    nget_uslong(&value, sep, &endp, 10)) != NUM_OK) {
560 				p = msg_print(sp, name, &nf);
561 				t = msg_print(sp, sep, &nf2);
562 				switch (nret) {
563 				case NUM_ERR:
564 					msgq(sp, M_SYSERR,
565 					    "set: %s option: %s", p, t);
566 					break;
567 				case NUM_OVER:
568 					msgq(sp, M_ERR,
569 			    "set: %s option: %s: value overflow", p, t);
570 					break;
571 				case NUM_OK:
572 				case NUM_UNDER:
573 					abort();
574 				}
575 				if (nf)
576 					FREE_SPACE(sp, p, 0);
577 				if (nf2)
578 					FREE_SPACE(sp, t, 0);
579 				rval = 1;
580 				break;
581 			}
582 			if (*endp && !isblank(*endp)) {
583 badnum:				p = msg_print(sp, name, &nf);
584 				t = msg_print(sp, sep, &nf2);
585 				msgq(sp, M_ERR,
586 		    "set: %s option: %s is an illegal number", p, t);
587 				if (nf)
588 					FREE_SPACE(sp, p, 0);
589 				if (nf2)
590 					FREE_SPACE(sp, t, 0);
591 				rval = 1;
592 				break;
593 			}
594 
595 			/* Some options may never be set to zero. */
596 			if (F_ISSET(op, OPT_NOZERO) && value == 0) {
597 				msgq_str(sp, M_ERR, name,
598 			    "set: the %s option may never be set to 0");
599 				rval = 1;
600 				break;
601 			}
602 
603 			/*
604 			 * Do nothing if the value is unchanged, the underlying
605 			 * functions can be expensive.
606 			 */
607 			if (!F_ISSET(op, OPT_ALWAYS) &&
608 			    O_VAL(sp, offset) == value)
609 				break;
610 
611 			if (F_ISSET(op, OPT_EARLYSET)) {
612 			    /* Set the value. */
613 			    if (o_set(sp, offset, 0, NULL, value)) {
614 				rval = 1;
615 				break;
616 			    }
617 			}
618 
619 			/* Report to subsystems. */
620 			if ((op->func != NULL &&
621 			    op->func(sp, spo, sep, &value)) ||
622 			    ex_optchange(sp, offset, sep, &value) ||
623 			    v_optchange(sp, offset, sep, &value) ||
624 			    sp->gp->scr_optchange(sp, offset, sep, &value)) {
625 				rval = 1;
626 				break;
627 			}
628 
629 			if (!F_ISSET(op, OPT_EARLYSET)) {
630 			    /* Set the value. */
631 			    if (o_set(sp, offset, 0, NULL, value))
632 				rval = 1;
633 			}
634 			break;
635 		case OPT_STR:
636 			if (turnoff) {
637 				msgq_str(sp, M_ERR, name,
638 				    "set: %s option isn't a boolean");
639 				rval = 1;
640 				break;
641 			}
642 			if (qmark || !equals) {
643 				if (!disp)
644 					disp = SELECT_DISPLAY;
645 				F_SET(spo, OPT_SELECTED);
646 				break;
647 			}
648 
649 			/*
650 			 * Do nothing if the value is unchanged, the underlying
651 			 * functions can be expensive.
652 			 */
653 			if (!F_ISSET(op, OPT_ALWAYS) &&
654 			    O_STR(sp, offset) != NULL &&
655 			    !strcmp(O_STR(sp, offset), sep))
656 				break;
657 
658 			if (F_ISSET(op, OPT_EARLYSET)) {
659 			    /* Set the value. */
660 			    if (o_set(sp, offset, OS_STRDUP, sep, 0)) {
661 				rval = 1;
662 				break;
663 			    }
664 			}
665 
666 			/* Report to subsystems. */
667 			if ((op->func != NULL &&
668 			    op->func(sp, spo, sep, NULL)) ||
669 			    ex_optchange(sp, offset, sep, NULL) ||
670 			    v_optchange(sp, offset, sep, NULL) ||
671 			    sp->gp->scr_optchange(sp, offset, sep, NULL)) {
672 				rval = 1;
673 				break;
674 			}
675 
676 			if (!F_ISSET(op, OPT_EARLYSET)) {
677 			    /* Set the value. */
678 			    if (o_set(sp, offset, OS_STRDUP, sep, 0))
679 				rval = 1;
680 			}
681 			break;
682 		default:
683 			abort();
684 		}
685 	}
686 	if (disp != NO_DISPLAY)
687 		opts_dump(sp, disp);
688 	return (rval);
689 }
690 
691 /*
692  * o_set --
693  *	Set an option's value.
694  *
695  * PUBLIC: int o_set(SCR *, int, u_int, char *, u_long);
696  */
697 int
o_set(SCR * sp,int opt,u_int flags,char * str,u_long val)698 o_set(SCR *sp, int opt, u_int flags, char *str, u_long val)
699 {
700 	OPTION *op;
701 
702 	/* Set a pointer to the options area. */
703 	op = F_ISSET(&sp->opts[opt], OPT_GLOBAL) ?
704 	    &sp->gp->opts[sp->opts[opt].o_cur.val] : &sp->opts[opt];
705 
706 	/* Copy the string, if requested. */
707 	if (LF_ISSET(OS_STRDUP) && (str = strdup(str)) == NULL) {
708 		msgq(sp, M_SYSERR, NULL);
709 		return (1);
710 	}
711 
712 	/* Free the previous string, if requested, and set the value. */
713 	if (LF_ISSET(OS_DEF))
714 		if (LF_ISSET(OS_STR | OS_STRDUP)) {
715 			if (!LF_ISSET(OS_NOFREE) && op->o_def.str != NULL)
716 				free(op->o_def.str);
717 			op->o_def.str = str;
718 		} else
719 			op->o_def.val = val;
720 	else
721 		if (LF_ISSET(OS_STR | OS_STRDUP)) {
722 			if (!LF_ISSET(OS_NOFREE) && op->o_cur.str != NULL)
723 				free(op->o_cur.str);
724 			op->o_cur.str = str;
725 		} else
726 			op->o_cur.val = val;
727 	return (0);
728 }
729 
730 /*
731  * opts_empty --
732  *	Return 1 if the string option is invalid, 0 if it's OK.
733  *
734  * PUBLIC: int opts_empty(SCR *, int, int);
735  */
736 int
opts_empty(SCR * sp,int off,int silent)737 opts_empty(SCR *sp, int off, int silent)
738 {
739 	char *p;
740 
741 	if ((p = O_STR(sp, off)) == NULL || p[0] == '\0') {
742 		if (!silent)
743 			msgq_str(sp, M_ERR, optlist[off].name,
744 			    "No %s edit option specified");
745 		return (1);
746 	}
747 	return (0);
748 }
749 
750 /*
751  * opts_dump --
752  *	List the current values of selected options.
753  *
754  * PUBLIC: void opts_dump(SCR *, enum optdisp);
755  */
756 void
opts_dump(SCR * sp,enum optdisp type)757 opts_dump(SCR *sp, enum optdisp type)
758 {
759 	OPTLIST const *op;
760 	int base, b_num, cnt, col, colwidth, curlen, s_num;
761 	int numcols, numrows, row;
762 	int b_op[O_OPTIONCOUNT], s_op[O_OPTIONCOUNT];
763 	char nbuf[20];
764 
765 	/*
766 	 * Options are output in two groups -- those that fit in a column and
767 	 * those that don't.  Output is done on 6 character "tab" boundaries
768 	 * for no particular reason.  (Since we don't output tab characters,
769 	 * we can ignore the terminal's tab settings.)  Ignore the user's tab
770 	 * setting because we have no idea how reasonable it is.
771 	 *
772 	 * Find a column width we can live with, testing from 10 columns to 1.
773 	 */
774 	for (numcols = 10; numcols > 1; --numcols) {
775 		colwidth = sp->cols / numcols & ~(STANDARD_TAB - 1);
776 		if (colwidth >= 10) {
777 			colwidth =
778 			    (colwidth + STANDARD_TAB) & ~(STANDARD_TAB - 1);
779 			numcols = sp->cols / colwidth;
780 			break;
781 		}
782 		colwidth = 0;
783 	}
784 
785 	/*
786 	 * Get the set of options to list, entering them into
787 	 * the column list or the overflow list.
788 	 */
789 	for (b_num = s_num = 0, op = optlist; op->name != NULL; ++op) {
790 		cnt = op - optlist;
791 
792 		/* If OPT_NDISP set, it's never displayed. */
793 		if (F_ISSET(op, OPT_NDISP))
794 			continue;
795 
796 		switch (type) {
797 		case ALL_DISPLAY:		/* Display all. */
798 			break;
799 		case CHANGED_DISPLAY:		/* Display changed. */
800 			/* If OPT_ADISP set, it's always "changed". */
801 			if (F_ISSET(op, OPT_ADISP))
802 				break;
803 			switch (op->type) {
804 			case OPT_0BOOL:
805 			case OPT_1BOOL:
806 			case OPT_NUM:
807 				if (O_VAL(sp, cnt) == O_D_VAL(sp, cnt))
808 					continue;
809 				break;
810 			case OPT_STR:
811 				if (O_STR(sp, cnt) == O_D_STR(sp, cnt) ||
812 				    (O_D_STR(sp, cnt) != NULL &&
813 				    !strcmp(O_STR(sp, cnt), O_D_STR(sp, cnt))))
814 					continue;
815 				break;
816 			}
817 			break;
818 		case SELECT_DISPLAY:		/* Display selected. */
819 			if (!F_ISSET(&sp->opts[cnt], OPT_SELECTED))
820 				continue;
821 			break;
822 		default:
823 		case NO_DISPLAY:
824 			abort();
825 		}
826 		F_CLR(&sp->opts[cnt], OPT_SELECTED);
827 
828 		curlen = strlen(op->name);
829 		switch (op->type) {
830 		case OPT_0BOOL:
831 		case OPT_1BOOL:
832 			if (!O_ISSET(sp, cnt))
833 				curlen += 2;
834 			break;
835 		case OPT_NUM:
836 			(void)snprintf(nbuf,
837 			    sizeof(nbuf), "%ld", O_VAL(sp, cnt));
838 			curlen += strlen(nbuf);
839 			break;
840 		case OPT_STR:
841 			if (O_STR(sp, cnt) != NULL)
842 				curlen += strlen(O_STR(sp, cnt));
843 			curlen += 3;
844 			break;
845 		}
846 		/* Offset by 2 so there's a gap. */
847 		if (curlen <= colwidth - 2)
848 			s_op[s_num++] = cnt;
849 		else
850 			b_op[b_num++] = cnt;
851 	}
852 
853 	if (s_num > 0) {
854 		/* Figure out the number of rows. */
855 		if (s_num > numcols) {
856 			numrows = s_num / numcols;
857 			if (s_num % numcols)
858 				++numrows;
859 		} else
860 			numrows = 1;
861 
862 		/* Display the options in sorted order. */
863 		for (row = 0; row < numrows;) {
864 			for (base = row, col = 0; col < numcols; ++col) {
865 				cnt = opts_print(sp, &optlist[s_op[base]]);
866 				if ((base += numrows) >= s_num)
867 					break;
868 				(void)ex_printf(sp, "%*s",
869 				    (int)(colwidth - cnt), "");
870 			}
871 			if (++row < numrows || b_num)
872 				(void)ex_puts(sp, "\n");
873 		}
874 	}
875 
876 	for (row = 0; row < b_num;) {
877 		(void)opts_print(sp, &optlist[b_op[row]]);
878 		if (++row < b_num)
879 			(void)ex_puts(sp, "\n");
880 	}
881 	(void)ex_puts(sp, "\n");
882 }
883 
884 /*
885  * opts_print --
886  *	Print out an option.
887  */
888 static int
opts_print(SCR * sp,OPTLIST const * op)889 opts_print(SCR *sp, OPTLIST const *op)
890 {
891 	int curlen, offset;
892 
893 	curlen = 0;
894 	offset = op - optlist;
895 	switch (op->type) {
896 	case OPT_0BOOL:
897 	case OPT_1BOOL:
898 		curlen += ex_printf(sp,
899 		    "%s%s", O_ISSET(sp, offset) ? "" : "no", op->name);
900 		break;
901 	case OPT_NUM:
902 		curlen += ex_printf(sp, "%s=%ld", op->name, O_VAL(sp, offset));
903 		break;
904 	case OPT_STR:
905 		curlen += ex_printf(sp, "%s=\"%s\"", op->name,
906 		    O_STR(sp, offset) == NULL ? "" : O_STR(sp, offset));
907 		break;
908 	}
909 	return (curlen);
910 }
911 
912 /*
913  * opts_save --
914  *	Write the current configuration to a file.
915  *
916  * PUBLIC: int opts_save(SCR *, FILE *);
917  */
918 int
opts_save(SCR * sp,FILE * fp)919 opts_save(SCR *sp, FILE *fp)
920 {
921 	OPTLIST const *op;
922 	int ch, cnt;
923 	char *p;
924 
925 	for (op = optlist; op->name != NULL; ++op) {
926 		if (F_ISSET(op, OPT_NOSAVE))
927 			continue;
928 		cnt = op - optlist;
929 		switch (op->type) {
930 		case OPT_0BOOL:
931 		case OPT_1BOOL:
932 			if (O_ISSET(sp, cnt))
933 				(void)fprintf(fp, "set %s\n", op->name);
934 			else
935 				(void)fprintf(fp, "set no%s\n", op->name);
936 			break;
937 		case OPT_NUM:
938 			(void)fprintf(fp,
939 			    "set %s=%-3ld\n", op->name, O_VAL(sp, cnt));
940 			break;
941 		case OPT_STR:
942 			if (O_STR(sp, cnt) == NULL)
943 				break;
944 			(void)fprintf(fp, "set ");
945 			for (p = op->name; (ch = *p) != '\0'; ++p) {
946 				if (isblank(ch) || ch == '\\')
947 					(void)putc('\\', fp);
948 				(void)putc(ch, fp);
949 			}
950 			(void)putc('=', fp);
951 			for (p = O_STR(sp, cnt); (ch = *p) != '\0'; ++p) {
952 				if (isblank(ch) || ch == '\\')
953 					(void)putc('\\', fp);
954 				(void)putc(ch, fp);
955 			}
956 			(void)putc('\n', fp);
957 			break;
958 		}
959 		if (ferror(fp)) {
960 			msgq(sp, M_SYSERR, NULL);
961 			return (1);
962 		}
963 	}
964 	return (0);
965 }
966 
967 /*
968  * opts_search --
969  *	Search for an option.
970  *
971  * PUBLIC: OPTLIST const *opts_search(char *);
972  */
973 OPTLIST const *
opts_search(char * name)974 opts_search(char *name)
975 {
976 	OPTLIST const *op, *found;
977 	OABBREV atmp, *ap;
978 	OPTLIST otmp;
979 	size_t len;
980 
981 	/* Check list of abbreviations. */
982 	atmp.name = name;
983 	if ((ap = bsearch(&atmp, abbrev, sizeof(abbrev) / sizeof(OABBREV) - 1,
984 	    sizeof(OABBREV), opts_abbcmp)) != NULL)
985 		return (optlist + ap->offset);
986 
987 	/* Check list of options. */
988 	otmp.name = name;
989 	if ((op = bsearch(&otmp, optlist, sizeof(optlist) / sizeof(OPTLIST) - 1,
990 	    sizeof(OPTLIST), opts_cmp)) != NULL)
991 		return (op);
992 
993 	/*
994 	 * Check to see if the name is the prefix of one (and only one)
995 	 * option.  If so, return the option.
996 	 */
997 	len = strlen(name);
998 	for (found = NULL, op = optlist; op->name != NULL; ++op) {
999 		if (op->name[0] < name[0])
1000 			continue;
1001 		if (op->name[0] > name[0])
1002 			break;
1003 		if (!memcmp(op->name, name, len)) {
1004 			if (found != NULL)
1005 				return (NULL);
1006 			found = op;
1007 		}
1008 	}
1009 	return (found);
1010 }
1011 
1012 /*
1013  * opts_nomatch --
1014  *	Standard nomatch error message for options.
1015  *
1016  * PUBLIC: void opts_nomatch(SCR *, char *);
1017  */
1018 void
opts_nomatch(SCR * sp,char * name)1019 opts_nomatch(SCR *sp, char *name)
1020 {
1021 	msgq_str(sp, M_ERR, name,
1022 	    "set: no %s option: 'set all' gives all option values");
1023 }
1024 
1025 static int
opts_abbcmp(const void * a,const void * b)1026 opts_abbcmp(const void *a, const void *b)
1027 {
1028         return(strcmp(((OABBREV *)a)->name, ((OABBREV *)b)->name));
1029 }
1030 
1031 static int
opts_cmp(const void * a,const void * b)1032 opts_cmp(const void *a, const void *b)
1033 {
1034         return(strcmp(((OPTLIST *)a)->name, ((OPTLIST *)b)->name));
1035 }
1036 
1037 /*
1038  * opts_copy --
1039  *	Copy a screen's OPTION array.
1040  *
1041  * PUBLIC: int opts_copy(SCR *, SCR *);
1042  */
1043 int
opts_copy(SCR * orig,SCR * sp)1044 opts_copy(SCR *orig, SCR *sp)
1045 {
1046 	int cnt, rval;
1047 
1048 	/* Copy most everything without change. */
1049 	memcpy(sp->opts, orig->opts, sizeof(orig->opts));
1050 
1051 	/* Copy the string edit options. */
1052 	for (cnt = rval = 0; cnt < O_OPTIONCOUNT; ++cnt) {
1053 		if (optlist[cnt].type != OPT_STR ||
1054 		    F_ISSET(&optlist[cnt], OPT_GLOBAL))
1055 			continue;
1056 		/*
1057 		 * If never set, or already failed, NULL out the entries --
1058 		 * have to continue after failure, otherwise would have two
1059 		 * screens referencing the same memory.
1060 		 */
1061 		if (rval || O_STR(sp, cnt) == NULL) {
1062 			o_set(sp, cnt, OS_NOFREE | OS_STR, NULL, 0);
1063 			o_set(sp, cnt, OS_DEF | OS_NOFREE | OS_STR, NULL, 0);
1064 			continue;
1065 		}
1066 
1067 		/* Copy the current string. */
1068 		if (o_set(sp, cnt, OS_NOFREE | OS_STRDUP, O_STR(sp, cnt), 0)) {
1069 			o_set(sp, cnt, OS_DEF | OS_NOFREE | OS_STR, NULL, 0);
1070 			goto nomem;
1071 		}
1072 
1073 		/* Copy the default string. */
1074 		if (O_D_STR(sp, cnt) != NULL && o_set(sp, cnt,
1075 		    OS_DEF | OS_NOFREE | OS_STRDUP, O_D_STR(sp, cnt), 0)) {
1076 nomem:			msgq(orig, M_SYSERR, NULL);
1077 			rval = 1;
1078 		}
1079 	}
1080 	return (rval);
1081 }
1082 
1083 /*
1084  * opts_free --
1085  *	Free all option strings
1086  *
1087  * PUBLIC: void opts_free(SCR *);
1088  */
1089 void
opts_free(SCR * sp)1090 opts_free(SCR *sp)
1091 {
1092 	int cnt;
1093 
1094 	for (cnt = 0; cnt < O_OPTIONCOUNT; ++cnt) {
1095 		if (optlist[cnt].type != OPT_STR ||
1096 		    F_ISSET(&optlist[cnt], OPT_GLOBAL))
1097 			continue;
1098 		free(O_STR(sp, cnt));
1099 		free(O_D_STR(sp, cnt));
1100 	}
1101 }
1102