Home | History | Annotate | Line # | Download | only in libedit
el.c revision 1.22 
      1 /*	$NetBSD: el.c,v 1.22 2001/09/24 13:22:30 wiz 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 1.22 2001/09/24 13:22:30 wiz 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 
     98 	return (el);
     99 }
    100 
    101 
    102 /* el_end():
    103  *	Clean up.
    104  */
    105 public void
    106 el_end(EditLine *el)
    107 {
    108 
    109 	if (el == NULL)
    110 		return;
    111 
    112 	el_reset(el);
    113 
    114 	term_end(el);
    115 	key_end(el);
    116 	map_end(el);
    117 	tty_end(el);
    118 	ch_end(el);
    119 	search_end(el);
    120 	hist_end(el);
    121 	prompt_end(el);
    122 	sig_end(el);
    123 
    124 	el_free((ptr_t) el->el_prog);
    125 	el_free((ptr_t) el);
    126 }
    127 
    128 
    129 /* el_reset():
    130  *	Reset the tty and the parser
    131  */
    132 public void
    133 el_reset(EditLine *el)
    134 {
    135 
    136 	tty_cookedmode(el);
    137 	ch_reset(el);		/* XXX: Do we want that? */
    138 }
    139 
    140 
    141 /* el_set():
    142  *	set the editline parameters
    143  */
    144 public int
    145 el_set(EditLine *el, int op, ...)
    146 {
    147 	va_list va;
    148 	int rv;
    149 
    150 	if (el == NULL)
    151 		return (-1);
    152 	va_start(va, op);
    153 
    154 	switch (op) {
    155 	case EL_PROMPT:
    156 	case EL_RPROMPT:
    157 		rv = prompt_set(el, va_arg(va, el_pfunc_t), op);
    158 		break;
    159 
    160 	case EL_TERMINAL:
    161 		rv = term_set(el, va_arg(va, char *));
    162 		break;
    163 
    164 	case EL_EDITOR:
    165 		rv = map_set_editor(el, va_arg(va, char *));
    166 		break;
    167 
    168 	case EL_SIGNAL:
    169 		if (va_arg(va, int))
    170 			el->el_flags |= HANDLE_SIGNALS;
    171 		else
    172 			el->el_flags &= ~HANDLE_SIGNALS;
    173 		rv = 0;
    174 		break;
    175 
    176 	case EL_BIND:
    177 	case EL_TELLTC:
    178 	case EL_SETTC:
    179 	case EL_ECHOTC:
    180 	case EL_SETTY:
    181 	{
    182 		char *argv[20];
    183 		int i;
    184 
    185 		for (i = 1; i < 20; i++)
    186 			if ((argv[i] = va_arg(va, char *)) == NULL)
    187 				break;
    188 
    189 		switch (op) {
    190 		case EL_BIND:
    191 			argv[0] = "bind";
    192 			rv = map_bind(el, i, argv);
    193 			break;
    194 
    195 		case EL_TELLTC:
    196 			argv[0] = "telltc";
    197 			rv = term_telltc(el, i, argv);
    198 			break;
    199 
    200 		case EL_SETTC:
    201 			argv[0] = "settc";
    202 			rv = term_settc(el, i, argv);
    203 			break;
    204 
    205 		case EL_ECHOTC:
    206 			argv[0] = "echotc";
    207 			rv = term_echotc(el, i, argv);
    208 			break;
    209 
    210 		case EL_SETTY:
    211 			argv[0] = "setty";
    212 			rv = tty_stty(el, i, argv);
    213 			break;
    214 
    215 		default:
    216 			rv = -1;
    217 			EL_ABORT((el->el_errfile, "Bad op %d\n", op));
    218 			break;
    219 		}
    220 		break;
    221 	}
    222 
    223 	case EL_ADDFN:
    224 	{
    225 		char *name = va_arg(va, char *);
    226 		char *help = va_arg(va, char *);
    227 		el_func_t func = va_arg(va, el_func_t);
    228 
    229 		rv = map_addfunc(el, name, help, func);
    230 		break;
    231 	}
    232 
    233 	case EL_HIST:
    234 	{
    235 		hist_fun_t func = va_arg(va, hist_fun_t);
    236 		ptr_t ptr = va_arg(va, char *);
    237 
    238 		rv = hist_set(el, func, ptr);
    239 		break;
    240 	}
    241 
    242 	case EL_EDITMODE:
    243 		if (va_arg(va, int))
    244 			el->el_flags &= ~EDIT_DISABLED;
    245 		else
    246 			el->el_flags |= EDIT_DISABLED;
    247 		rv = 0;
    248 		break;
    249 
    250 	default:
    251 		rv = -1;
    252 	}
    253 
    254 	va_end(va);
    255 	return (rv);
    256 }
    257 
    258 
    259 /* el_get():
    260  *	retrieve the editline parameters
    261  */
    262 public int
    263 el_get(EditLine *el, int op, void *ret)
    264 {
    265 	int rv;
    266 
    267 	if (el == NULL || ret == NULL)
    268 		return (-1);
    269 	switch (op) {
    270 	case EL_PROMPT:
    271 	case EL_RPROMPT:
    272 		rv = prompt_get(el, (el_pfunc_t *) & ret, op);
    273 		break;
    274 
    275 	case EL_EDITOR:
    276 		rv = map_get_editor(el, (const char **) &ret);
    277 		break;
    278 
    279 	case EL_SIGNAL:
    280 		*((int *) ret) = (el->el_flags & HANDLE_SIGNALS);
    281 		rv = 0;
    282 		break;
    283 
    284 	case EL_EDITMODE:
    285 		*((int *) ret) = (!(el->el_flags & EDIT_DISABLED));
    286 		rv = 0;
    287 		break;
    288 
    289 #if 0				/* XXX */
    290 	case EL_TERMINAL:
    291 		rv = term_get(el, (const char *) &ret);
    292 		break;
    293 
    294 	case EL_BIND:
    295 	case EL_TELLTC:
    296 	case EL_SETTC:
    297 	case EL_ECHOTC:
    298 	case EL_SETTY:
    299 	{
    300 		char *argv[20];
    301 		int i;
    302 
    303 		for (i = 1; i < 20; i++)
    304 			if ((argv[i] = va_arg(va, char *)) == NULL)
    305 				break;
    306 
    307 		switch (op) {
    308 		case EL_BIND:
    309 			argv[0] = "bind";
    310 			rv = map_bind(el, i, argv);
    311 			break;
    312 
    313 		case EL_TELLTC:
    314 			argv[0] = "telltc";
    315 			rv = term_telltc(el, i, argv);
    316 			break;
    317 
    318 		case EL_SETTC:
    319 			argv[0] = "settc";
    320 			rv = term_settc(el, i, argv);
    321 			break;
    322 
    323 		case EL_ECHOTC:
    324 			argv[0] = "echotc";
    325 			rv = term_echotc(el, i, argv);
    326 			break;
    327 
    328 		case EL_SETTY:
    329 			argv[0] = "setty";
    330 			rv = tty_stty(el, i, argv);
    331 			break;
    332 
    333 		default:
    334 			rv = -1;
    335 			EL_ABORT((el->errfile, "Bad op %d\n", op));
    336 			break;
    337 		}
    338 		break;
    339 	}
    340 
    341 	case EL_ADDFN:
    342 	{
    343 		char *name = va_arg(va, char *);
    344 		char *help = va_arg(va, char *);
    345 		el_func_t func = va_arg(va, el_func_t);
    346 
    347 		rv = map_addfunc(el, name, help, func);
    348 		break;
    349 	}
    350 
    351 	case EL_HIST:
    352 		{
    353 			hist_fun_t func = va_arg(va, hist_fun_t);
    354 			ptr_t ptr = va_arg(va, char *);
    355 			rv = hist_set(el, func, ptr);
    356 		}
    357 		break;
    358 #endif /* XXX */
    359 
    360 	default:
    361 		rv = -1;
    362 	}
    363 
    364 	return (rv);
    365 }
    366 
    367 
    368 /* el_line():
    369  *	Return editing info
    370  */
    371 public const LineInfo *
    372 el_line(EditLine *el)
    373 {
    374 
    375 	return (const LineInfo *) (void *) &el->el_line;
    376 }
    377 
    378 static const char elpath[] = "/.editrc";
    379 
    380 /* el_source():
    381  *	Source a file
    382  */
    383 public int
    384 el_source(EditLine *el, const char *fname)
    385 {
    386 	FILE *fp;
    387 	size_t len;
    388 	char *ptr, path[MAXPATHLEN];
    389 
    390 	fp = NULL;
    391 	if (fname == NULL) {
    392 		if (issetugid())
    393 			return (-1);
    394 		if ((ptr = getenv("HOME")) == NULL)
    395 			return (-1);
    396 		if (strlcpy(path, ptr, sizeof(path)) >= sizeof(path))
    397 			return (-1);
    398 		if (strlcat(path, elpath, sizeof(path)) >= sizeof(path))
    399 			return (-1);
    400 		fname = path;
    401 	}
    402 	if (fp == NULL)
    403 		fp = fopen(fname, "r");
    404 	if (fp == NULL)
    405 		return (-1);
    406 
    407 	while ((ptr = fgetln(fp, &len)) != NULL) {
    408 		if (len > 0 && ptr[len - 1] == '\n')
    409 			--len;
    410 		ptr[len] = '\0';
    411 		if (parse_line(el, ptr) == -1) {
    412 			(void) fclose(fp);
    413 			return (-1);
    414 		}
    415 	}
    416 
    417 	(void) fclose(fp);
    418 	return (0);
    419 }
    420 
    421 
    422 /* el_resize():
    423  *	Called from program when terminal is resized
    424  */
    425 public void
    426 el_resize(EditLine *el)
    427 {
    428 	int lins, cols;
    429 	sigset_t oset, nset;
    430 
    431 	(void) sigemptyset(&nset);
    432 	(void) sigaddset(&nset, SIGWINCH);
    433 	(void) sigprocmask(SIG_BLOCK, &nset, &oset);
    434 
    435 	/* get the correct window size */
    436 	if (term_get_size(el, &lins, &cols))
    437 		term_change_size(el, lins, cols);
    438 
    439 	(void) sigprocmask(SIG_SETMASK, &oset, NULL);
    440 }
    441 
    442 
    443 /* el_beep():
    444  *	Called from the program to beep
    445  */
    446 public void
    447 el_beep(EditLine *el)
    448 {
    449 
    450 	term_beep(el);
    451 }
    452 
    453 
    454 /* el_editmode()
    455  *	Set the state of EDIT_DISABLED from the `edit' command.
    456  */
    457 protected int
    458 /*ARGSUSED*/
    459 el_editmode(EditLine *el, int argc, char **argv)
    460 {
    461 	const char *how;
    462 
    463 	if (argv == NULL || argc != 2 || argv[1] == NULL)
    464 		return (-1);
    465 
    466 	how = argv[1];
    467 	if (strcmp(how, "on") == 0)
    468 		el->el_flags &= ~EDIT_DISABLED;
    469 	else if (strcmp(how, "off") == 0)
    470 		el->el_flags |= EDIT_DISABLED;
    471 	else {
    472 		(void) fprintf(el->el_errfile, "edit: Bad value `%s'.\n", how);
    473 		return (-1);
    474 	}
    475 	return (0);
    476 }
    477