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el.c revision 1.23 
      1 /*	$NetBSD: el.c,v 1.23 2001/09/27 19:29:50 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1992, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * This code is derived from software contributed to Berkeley by
      8  * Christos Zoulas of Cornell University.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *	This product includes software developed by the University of
     21  *	California, Berkeley and its contributors.
     22  * 4. Neither the name of the University nor the names of its contributors
     23  *    may be used to endorse or promote products derived from this software
     24  *    without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     36  * SUCH DAMAGE.
     37  */
     38 
     39 #include <sys/cdefs.h>
     40 #if !defined(lint) && !defined(SCCSID)
     41 #if 0
     42 static char sccsid[] = "@(#)el.c	8.2 (Berkeley) 1/3/94";
     43 #else
     44 __RCSID("$NetBSD: el.c,v 1.23 2001/09/27 19:29:50 christos Exp $");
     45 #endif
     46 #endif /* not lint && not SCCSID */
     47 
     48 /*
     49  * el.c: EditLine interface functions
     50  */
     51 #include "sys.h"
     52 
     53 #include <sys/types.h>
     54 #include <sys/param.h>
     55 #include <string.h>
     56 #include <stdlib.h>
     57 #include <stdarg.h>
     58 #include "el.h"
     59 
     60 /* el_init():
     61  *	Initialize editline and set default parameters.
     62  */
     63 public EditLine *
     64 el_init(const char *prog, FILE *fin, FILE *fout, FILE *ferr)
     65 {
     66 
     67 	EditLine *el = (EditLine *) el_malloc(sizeof(EditLine));
     68 #ifdef DEBUG
     69 	char *tty;
     70 #endif
     71 
     72 	if (el == NULL)
     73 		return (NULL);
     74 
     75 	memset(el, 0, sizeof(EditLine));
     76 
     77 	el->el_infd = fileno(fin);
     78 	el->el_outfile = fout;
     79 	el->el_errfile = ferr;
     80 	el->el_prog = strdup(prog);
     81 
     82 	/*
     83          * Initialize all the modules. Order is important!!!
     84          */
     85 	el->el_flags = 0;
     86 
     87 	(void) term_init(el);
     88 	(void) key_init(el);
     89 	(void) map_init(el);
     90 	if (tty_init(el) == -1)
     91 		el->el_flags |= NO_TTY;
     92 	(void) ch_init(el);
     93 	(void) search_init(el);
     94 	(void) hist_init(el);
     95 	(void) prompt_init(el);
     96 	(void) sig_init(el);
     97 	(void) read_init(el);
     98 
     99 	return (el);
    100 }
    101 
    102 
    103 /* el_end():
    104  *	Clean up.
    105  */
    106 public void
    107 el_end(EditLine *el)
    108 {
    109 
    110 	if (el == NULL)
    111 		return;
    112 
    113 	el_reset(el);
    114 
    115 	term_end(el);
    116 	key_end(el);
    117 	map_end(el);
    118 	tty_end(el);
    119 	ch_end(el);
    120 	search_end(el);
    121 	hist_end(el);
    122 	prompt_end(el);
    123 	sig_end(el);
    124 
    125 	el_free((ptr_t) el->el_prog);
    126 	el_free((ptr_t) el);
    127 }
    128 
    129 
    130 /* el_reset():
    131  *	Reset the tty and the parser
    132  */
    133 public void
    134 el_reset(EditLine *el)
    135 {
    136 
    137 	tty_cookedmode(el);
    138 	ch_reset(el);		/* XXX: Do we want that? */
    139 }
    140 
    141 
    142 /* el_set():
    143  *	set the editline parameters
    144  */
    145 public int
    146 el_set(EditLine *el, int op, ...)
    147 {
    148 	va_list va;
    149 	int rv;
    150 
    151 	if (el == NULL)
    152 		return (-1);
    153 	va_start(va, op);
    154 
    155 	switch (op) {
    156 	case EL_PROMPT:
    157 	case EL_RPROMPT:
    158 		rv = prompt_set(el, va_arg(va, el_pfunc_t), op);
    159 		break;
    160 
    161 	case EL_TERMINAL:
    162 		rv = term_set(el, va_arg(va, char *));
    163 		break;
    164 
    165 	case EL_EDITOR:
    166 		rv = map_set_editor(el, va_arg(va, char *));
    167 		break;
    168 
    169 	case EL_SIGNAL:
    170 		if (va_arg(va, int))
    171 			el->el_flags |= HANDLE_SIGNALS;
    172 		else
    173 			el->el_flags &= ~HANDLE_SIGNALS;
    174 		rv = 0;
    175 		break;
    176 
    177 	case EL_BIND:
    178 	case EL_TELLTC:
    179 	case EL_SETTC:
    180 	case EL_ECHOTC:
    181 	case EL_SETTY:
    182 	{
    183 		char *argv[20];
    184 		int i;
    185 
    186 		for (i = 1; i < 20; i++)
    187 			if ((argv[i] = va_arg(va, char *)) == NULL)
    188 				break;
    189 
    190 		switch (op) {
    191 		case EL_BIND:
    192 			argv[0] = "bind";
    193 			rv = map_bind(el, i, argv);
    194 			break;
    195 
    196 		case EL_TELLTC:
    197 			argv[0] = "telltc";
    198 			rv = term_telltc(el, i, argv);
    199 			break;
    200 
    201 		case EL_SETTC:
    202 			argv[0] = "settc";
    203 			rv = term_settc(el, i, argv);
    204 			break;
    205 
    206 		case EL_ECHOTC:
    207 			argv[0] = "echotc";
    208 			rv = term_echotc(el, i, argv);
    209 			break;
    210 
    211 		case EL_SETTY:
    212 			argv[0] = "setty";
    213 			rv = tty_stty(el, i, argv);
    214 			break;
    215 
    216 		default:
    217 			rv = -1;
    218 			EL_ABORT((el->el_errfile, "Bad op %d\n", op));
    219 			break;
    220 		}
    221 		break;
    222 	}
    223 
    224 	case EL_ADDFN:
    225 	{
    226 		char *name = va_arg(va, char *);
    227 		char *help = va_arg(va, char *);
    228 		el_func_t func = va_arg(va, el_func_t);
    229 
    230 		rv = map_addfunc(el, name, help, func);
    231 		break;
    232 	}
    233 
    234 	case EL_HIST:
    235 	{
    236 		hist_fun_t func = va_arg(va, hist_fun_t);
    237 		ptr_t ptr = va_arg(va, char *);
    238 
    239 		rv = hist_set(el, func, ptr);
    240 		break;
    241 	}
    242 
    243 	case EL_EDITMODE:
    244 		if (va_arg(va, int))
    245 			el->el_flags &= ~EDIT_DISABLED;
    246 		else
    247 			el->el_flags |= EDIT_DISABLED;
    248 		rv = 0;
    249 		break;
    250 
    251 	case EL_GETCFN:
    252 	{
    253 		el_rfunc_t rc = va_arg(va, el_rfunc_t);
    254 		rv = el_read_setfn(el, rc);
    255 		break;
    256 	}
    257 
    258 	default:
    259 		rv = -1;
    260 	}
    261 
    262 	va_end(va);
    263 	return (rv);
    264 }
    265 
    266 
    267 /* el_get():
    268  *	retrieve the editline parameters
    269  */
    270 public int
    271 el_get(EditLine *el, int op, void *ret)
    272 {
    273 	int rv;
    274 
    275 	if (el == NULL || ret == NULL)
    276 		return (-1);
    277 	switch (op) {
    278 	case EL_PROMPT:
    279 	case EL_RPROMPT:
    280 		rv = prompt_get(el, (el_pfunc_t *) & ret, op);
    281 		break;
    282 
    283 	case EL_EDITOR:
    284 		rv = map_get_editor(el, (const char **) &ret);
    285 		break;
    286 
    287 	case EL_SIGNAL:
    288 		*((int *) ret) = (el->el_flags & HANDLE_SIGNALS);
    289 		rv = 0;
    290 		break;
    291 
    292 	case EL_EDITMODE:
    293 		*((int *) ret) = (!(el->el_flags & EDIT_DISABLED));
    294 		rv = 0;
    295 		break;
    296 
    297 #if 0				/* XXX */
    298 	case EL_TERMINAL:
    299 		rv = term_get(el, (const char *) &ret);
    300 		break;
    301 
    302 	case EL_BIND:
    303 	case EL_TELLTC:
    304 	case EL_SETTC:
    305 	case EL_ECHOTC:
    306 	case EL_SETTY:
    307 	{
    308 		char *argv[20];
    309 		int i;
    310 
    311 		for (i = 1; i < 20; i++)
    312 			if ((argv[i] = va_arg(va, char *)) == NULL)
    313 				break;
    314 
    315 		switch (op) {
    316 		case EL_BIND:
    317 			argv[0] = "bind";
    318 			rv = map_bind(el, i, argv);
    319 			break;
    320 
    321 		case EL_TELLTC:
    322 			argv[0] = "telltc";
    323 			rv = term_telltc(el, i, argv);
    324 			break;
    325 
    326 		case EL_SETTC:
    327 			argv[0] = "settc";
    328 			rv = term_settc(el, i, argv);
    329 			break;
    330 
    331 		case EL_ECHOTC:
    332 			argv[0] = "echotc";
    333 			rv = term_echotc(el, i, argv);
    334 			break;
    335 
    336 		case EL_SETTY:
    337 			argv[0] = "setty";
    338 			rv = tty_stty(el, i, argv);
    339 			break;
    340 
    341 		default:
    342 			rv = -1;
    343 			EL_ABORT((el->errfile, "Bad op %d\n", op));
    344 			break;
    345 		}
    346 		break;
    347 	}
    348 
    349 	case EL_ADDFN:
    350 	{
    351 		char *name = va_arg(va, char *);
    352 		char *help = va_arg(va, char *);
    353 		el_func_t func = va_arg(va, el_func_t);
    354 
    355 		rv = map_addfunc(el, name, help, func);
    356 		break;
    357 	}
    358 
    359 	case EL_HIST:
    360 		{
    361 			hist_fun_t func = va_arg(va, hist_fun_t);
    362 			ptr_t ptr = va_arg(va, char *);
    363 			rv = hist_set(el, func, ptr);
    364 		}
    365 		break;
    366 #endif /* XXX */
    367 
    368 	case EL_GETCFN:
    369 		*((el_rfunc_t *)ret) = el_read_getfn(el);
    370 		rv = 0;
    371 		break;
    372 
    373 	default:
    374 		rv = -1;
    375 	}
    376 
    377 	return (rv);
    378 }
    379 
    380 
    381 /* el_line():
    382  *	Return editing info
    383  */
    384 public const LineInfo *
    385 el_line(EditLine *el)
    386 {
    387 
    388 	return (const LineInfo *) (void *) &el->el_line;
    389 }
    390 
    391 static const char elpath[] = "/.editrc";
    392 
    393 /* el_source():
    394  *	Source a file
    395  */
    396 public int
    397 el_source(EditLine *el, const char *fname)
    398 {
    399 	FILE *fp;
    400 	size_t len;
    401 	char *ptr, path[MAXPATHLEN];
    402 
    403 	fp = NULL;
    404 	if (fname == NULL) {
    405 		if (issetugid())
    406 			return (-1);
    407 		if ((ptr = getenv("HOME")) == NULL)
    408 			return (-1);
    409 		if (strlcpy(path, ptr, sizeof(path)) >= sizeof(path))
    410 			return (-1);
    411 		if (strlcat(path, elpath, sizeof(path)) >= sizeof(path))
    412 			return (-1);
    413 		fname = path;
    414 	}
    415 	if (fp == NULL)
    416 		fp = fopen(fname, "r");
    417 	if (fp == NULL)
    418 		return (-1);
    419 
    420 	while ((ptr = fgetln(fp, &len)) != NULL) {
    421 		if (len > 0 && ptr[len - 1] == '\n')
    422 			--len;
    423 		ptr[len] = '\0';
    424 		if (parse_line(el, ptr) == -1) {
    425 			(void) fclose(fp);
    426 			return (-1);
    427 		}
    428 	}
    429 
    430 	(void) fclose(fp);
    431 	return (0);
    432 }
    433 
    434 
    435 /* el_resize():
    436  *	Called from program when terminal is resized
    437  */
    438 public void
    439 el_resize(EditLine *el)
    440 {
    441 	int lins, cols;
    442 	sigset_t oset, nset;
    443 
    444 	(void) sigemptyset(&nset);
    445 	(void) sigaddset(&nset, SIGWINCH);
    446 	(void) sigprocmask(SIG_BLOCK, &nset, &oset);
    447 
    448 	/* get the correct window size */
    449 	if (term_get_size(el, &lins, &cols))
    450 		term_change_size(el, lins, cols);
    451 
    452 	(void) sigprocmask(SIG_SETMASK, &oset, NULL);
    453 }
    454 
    455 
    456 /* el_beep():
    457  *	Called from the program to beep
    458  */
    459 public void
    460 el_beep(EditLine *el)
    461 {
    462 
    463 	term_beep(el);
    464 }
    465 
    466 
    467 /* el_editmode()
    468  *	Set the state of EDIT_DISABLED from the `edit' command.
    469  */
    470 protected int
    471 /*ARGSUSED*/
    472 el_editmode(EditLine *el, int argc, char **argv)
    473 {
    474 	const char *how;
    475 
    476 	if (argv == NULL || argc != 2 || argv[1] == NULL)
    477 		return (-1);
    478 
    479 	how = argv[1];
    480 	if (strcmp(how, "on") == 0)
    481 		el->el_flags &= ~EDIT_DISABLED;
    482 	else if (strcmp(how, "off") == 0)
    483 		el->el_flags |= EDIT_DISABLED;
    484 	else {
    485 		(void) fprintf(el->el_errfile, "edit: Bad value `%s'.\n", how);
    486 		return (-1);
    487 	}
    488 	return (0);
    489 }
    490