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subr_userconf.c revision 1.16 
      1 /*	$NetBSD: subr_userconf.c,v 1.16 2005/08/25 15:06:28 drochner Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1996 Mats O Jansson <moj (at) stacken.kth.se>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by Mats O Jansson.
     18  * 4. The name of the author may not be used to endorse or promote
     19  *    products derived from this software without specific prior written
     20  *    permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
     23  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     24  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
     26  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     32  * SUCH DAMAGE.
     33  *
     34  *	OpenBSD: subr_userconf.c,v 1.19 2000/01/08 23:23:37 d Exp
     35  */
     36 
     37 #include <sys/cdefs.h>
     38 __KERNEL_RCSID(0, "$NetBSD: subr_userconf.c,v 1.16 2005/08/25 15:06:28 drochner Exp $");
     39 
     40 #include "opt_userconf.h"
     41 
     42 #include <sys/param.h>
     43 #include <sys/systm.h>
     44 #include <sys/device.h>
     45 #include <sys/malloc.h>
     46 #include <sys/time.h>
     47 
     48 #include <dev/cons.h>
     49 
     50 extern struct cfdata cfdata[];
     51 
     52 static int userconf_base = 16;			/* Base for "large" numbers */
     53 static int userconf_maxdev = -1;		/* # of used device slots   */
     54 static int userconf_totdev = -1;		/* # of device slots        */
     55 #if 0
     56 static int userconf_maxlocnames = -1;		/* # of locnames            */
     57 #endif
     58 static int userconf_cnt = -1;			/* Line counter for ...     */
     59 static int userconf_lines = 12;			/* ... # of lines per page  */
     60 static int userconf_histlen = 0;
     61 static int userconf_histcur = 0;
     62 static char userconf_history[1024];
     63 static int userconf_histsz = sizeof(userconf_history);
     64 static char userconf_argbuf[40];		/* Additional input         */
     65 static char userconf_cmdbuf[40];		/* Command line             */
     66 static char userconf_histbuf[40];
     67 
     68 static int getsn(char *, int);
     69 
     70 #define UC_CHANGE 'c'
     71 #define UC_DISABLE 'd'
     72 #define UC_ENABLE 'e'
     73 #define UC_FIND 'f'
     74 #define UC_SHOW 's'
     75 
     76 static const char *userconf_cmds[] = {
     77 	"base",		"b",
     78 	"change",	"c",
     79 	"disable",	"d",
     80 	"enable",	"e",
     81 	"exit",		"q",
     82 	"find",		"f",
     83 	"help",		"h",
     84 	"list",		"l",
     85 	"lines",	"L",
     86 	"quit",		"q",
     87 	"?",		"h",
     88 	"",		 "",
     89 };
     90 
     91 static void
     92 userconf_init(void)
     93 {
     94 	int i;
     95 	struct cfdata *cf;
     96 
     97 	i = 0;
     98 	for (cf = cfdata; cf->cf_name; cf++)
     99 		i++;
    100 
    101 	userconf_maxdev = i - 1;
    102 	userconf_totdev = i - 1;
    103 }
    104 
    105 static int
    106 userconf_more(void)
    107 {
    108 	int quit = 0;
    109 	char c = '\0';
    110 
    111 	if (userconf_cnt != -1) {
    112 		if (userconf_cnt == userconf_lines) {
    113 			printf("-- more --");
    114 			c = cngetc();
    115 			userconf_cnt = 0;
    116 			printf("\r            \r");
    117 		}
    118 		userconf_cnt++;
    119 		if (c == 'q' || c == 'Q')
    120 			quit = 1;
    121 	}
    122 	return (quit);
    123 }
    124 
    125 static void
    126 userconf_hist_cmd(char cmd)
    127 {
    128 	userconf_histcur = userconf_histlen;
    129 	if (userconf_histcur < userconf_histsz) {
    130 		userconf_history[userconf_histcur] = cmd;
    131 		userconf_histcur++;
    132 	}
    133 }
    134 
    135 static void
    136 userconf_hist_int(int val)
    137 {
    138 	snprintf(userconf_histbuf, sizeof(userconf_histbuf), " %d", val);
    139 	if ((userconf_histcur + strlen(userconf_histbuf)) < userconf_histsz) {
    140 		memcpy(&userconf_history[userconf_histcur],
    141 		      userconf_histbuf,
    142 		      strlen(userconf_histbuf));
    143 		userconf_histcur = userconf_histcur + strlen(userconf_histbuf);
    144 	}
    145 }
    146 
    147 static void
    148 userconf_hist_eoc(void)
    149 {
    150 	if (userconf_histcur < userconf_histsz) {
    151 		userconf_history[userconf_histcur] = '\n';
    152 		userconf_histcur++;
    153 		userconf_histlen = userconf_histcur;
    154 	}
    155 }
    156 
    157 static void
    158 userconf_pnum(int val)
    159 {
    160 	if (val > -2 && val < 16) {
    161 		printf("%d",val);
    162 	} else {
    163 		switch (userconf_base) {
    164 		case 8:
    165 			printf("0%o",val);
    166 			break;
    167 		case 10:
    168 			printf("%d",val);
    169 			break;
    170 		case 16:
    171 		default:
    172 			printf("0x%x",val);
    173 			break;
    174 		}
    175 	}
    176 }
    177 
    178 static void
    179 userconf_pdevnam(short dev)
    180 {
    181 	struct cfdata *cd;
    182 
    183 	cd = &cfdata[dev];
    184 	printf("%s", cd->cf_name);
    185 	switch (cd->cf_fstate) {
    186 	case FSTATE_NOTFOUND:
    187 	case FSTATE_DNOTFOUND:
    188 		printf("%d", cd->cf_unit);
    189 		break;
    190 	case FSTATE_FOUND:
    191 		printf("*FOUND*");
    192 		break;
    193 	case FSTATE_STAR:
    194 	case FSTATE_DSTAR:
    195 		printf("*");
    196 		break;
    197 	default:
    198 		printf("*UNKNOWN*");
    199 		break;
    200 	}
    201 }
    202 
    203 static void
    204 userconf_pdev(short devno)
    205 {
    206 	struct cfdata *cd;
    207 	const struct cfparent *cfp;
    208 	int   *l;
    209 	const struct cfiattrdata *ia;
    210 	const struct cflocdesc *ld;
    211 	int nld, i;
    212 
    213 	if (devno > userconf_maxdev) {
    214 		printf("Unknown devno (max is %d)\n", userconf_maxdev);
    215 		return;
    216 	}
    217 
    218 	cd = &cfdata[devno];
    219 
    220 	printf("[%3d] ", devno);
    221 	userconf_pdevnam(devno);
    222 	printf(" at");
    223 	cfp = cd->cf_pspec;
    224 	if (cfp == NULL)
    225 		printf(" root");
    226 	else if (cfp->cfp_parent != NULL && cfp->cfp_unit != -1)
    227 		printf(" %s%d", cfp->cfp_parent, cfp->cfp_unit);
    228 	else
    229 		printf(" %s?", cfp->cfp_parent != NULL ? cfp->cfp_parent
    230 						       : cfp->cfp_iattr);
    231 	switch (cd->cf_fstate) {
    232 	case FSTATE_NOTFOUND:
    233 	case FSTATE_FOUND:
    234 	case FSTATE_STAR:
    235 		break;
    236 	case FSTATE_DNOTFOUND:
    237 	case FSTATE_DSTAR:
    238 		printf(" disable");
    239 		break;
    240 	default:
    241 		printf(" ???");
    242 		break;
    243 	}
    244 	if (cfp) {
    245 		l = cd->cf_loc;
    246 		ia = cfiattr_lookup(cfp->cfp_iattr, 0);
    247 		KASSERT(ia);
    248 		ld = ia->ci_locdesc;
    249 		nld = ia->ci_loclen;
    250 		for (i = 0; i < nld; i++) {
    251 			printf(" %s ", ld[i].cld_name);
    252 			userconf_pnum(*l++);
    253 		}
    254 	}
    255 	printf("\n");
    256 }
    257 
    258 static int
    259 userconf_number(char *c, int *val)
    260 {
    261 	u_int num = 0;
    262 	int neg = 0;
    263 	int base = 10;
    264 
    265 	if (*c == '-') {
    266 		neg = 1;
    267 		c++;
    268 	}
    269 	if (*c == '0') {
    270 		base = 8;
    271 		c++;
    272 		if (*c == 'x' || *c == 'X') {
    273 			base = 16;
    274 			c++;
    275 		}
    276 	}
    277 	while (*c != '\n' && *c != '\t' && *c != ' ' && *c != '\0') {
    278 		u_char cc = *c;
    279 
    280 		if (cc >= '0' && cc <= '9')
    281 			cc = cc - '0';
    282 		else if (cc >= 'a' && cc <= 'f')
    283 			cc = cc - 'a' + 10;
    284 		else if (cc >= 'A' && cc <= 'F')
    285 			cc = cc - 'A' + 10;
    286 		else
    287 			return (-1);
    288 
    289 		if (cc > base)
    290 			return (-1);
    291 		num = num * base + cc;
    292 		c++;
    293 	}
    294 
    295 	if (neg && num > INT_MAX)	/* overflow */
    296 		return (1);
    297 	*val = neg ? - num : num;
    298 	return (0);
    299 }
    300 
    301 static int
    302 userconf_device(char *cmd, int *len, short *unit, short *state)
    303 {
    304 	short u = 0, s = FSTATE_FOUND;
    305 	int l = 0;
    306 	char *c;
    307 
    308 	c = cmd;
    309 	while (*c >= 'a' && *c <= 'z') {
    310 		l++;
    311 		c++;
    312 	}
    313 	if (*c == '*') {
    314 		s = FSTATE_STAR;
    315 		c++;
    316 	} else {
    317 		while (*c >= '0' && *c <= '9') {
    318 			s = FSTATE_NOTFOUND;
    319 			u = u*10 + *c - '0';
    320 			c++;
    321 		}
    322 	}
    323 	while (*c == ' ' || *c == '\t' || *c == '\n')
    324 		c++;
    325 
    326 	if (*c == '\0') {
    327 		*len = l;
    328 		*unit = u;
    329 		*state = s;
    330 		return(0);
    331 	}
    332 
    333 	return(-1);
    334 }
    335 
    336 static void
    337 userconf_modify(const char *item, int *val)
    338 {
    339 	int ok = 0;
    340 	int a;
    341 	char *c;
    342 
    343 	while (!ok) {
    344 		printf("%s [", item);
    345 		userconf_pnum(*val);
    346 		printf("] ? ");
    347 
    348 		getsn(userconf_argbuf, sizeof(userconf_argbuf));
    349 
    350 		c = userconf_argbuf;
    351 		while (*c == ' ' || *c == '\t' || *c == '\n') c++;
    352 
    353 		if (*c != '\0') {
    354 			if (userconf_number(c, &a) == 0) {
    355 				*val = a;
    356 				ok = 1;
    357 			} else {
    358 				printf("Unknown argument\n");
    359 			}
    360 		} else {
    361 			ok = 1;
    362 		}
    363 	}
    364 }
    365 
    366 static void
    367 userconf_change(int devno)
    368 {
    369 	struct cfdata *cd;
    370 	char c = '\0';
    371 	int   *l;
    372 	int   ln;
    373 	const struct cfiattrdata *ia;
    374 	const struct cflocdesc *ld;
    375 	int nld;
    376 
    377 	if (devno <=  userconf_maxdev) {
    378 
    379 		userconf_pdev(devno);
    380 
    381 		while (c != 'y' && c != 'Y' && c != 'n' && c != 'N') {
    382 			printf("change (y/n) ?");
    383 			c = cngetc();
    384 			printf("\n");
    385 		}
    386 
    387 		if (c == 'y' || c == 'Y') {
    388 
    389 			/* XXX add cmd 'c' <devno> */
    390 			userconf_hist_cmd('c');
    391 			userconf_hist_int(devno);
    392 
    393 			cd = &cfdata[devno];
    394 			l = cd->cf_loc;
    395 			ia = cfiattr_lookup(cd->cf_pspec->cfp_iattr, 0);
    396 			KASSERT(ia);
    397 			ld = ia->ci_locdesc;
    398 			nld = ia->ci_loclen;
    399 
    400 			for (ln = 0; ln < nld; ln++)
    401 			{
    402 				userconf_modify(ld[ln].cld_name, l);
    403 
    404 				/* XXX add *l */
    405 				userconf_hist_int(*l);
    406 
    407 				l++;
    408 			}
    409 
    410 			printf("[%3d] ", devno);
    411 			userconf_pdevnam(devno);
    412 			printf(" changed\n");
    413 			userconf_pdev(devno);
    414 
    415 			/* XXX add eoc */
    416 			userconf_hist_eoc();
    417 
    418 		}
    419 	} else {
    420 		printf("Unknown devno (max is %d)\n", userconf_maxdev);
    421 	}
    422 }
    423 
    424 static void
    425 userconf_disable(int devno)
    426 {
    427 	int done = 0;
    428 
    429 	if (devno <= userconf_maxdev) {
    430 		switch (cfdata[devno].cf_fstate) {
    431 		case FSTATE_NOTFOUND:
    432 			cfdata[devno].cf_fstate = FSTATE_DNOTFOUND;
    433 			break;
    434 		case FSTATE_STAR:
    435 			cfdata[devno].cf_fstate = FSTATE_DSTAR;
    436 			break;
    437 		case FSTATE_DNOTFOUND:
    438 		case FSTATE_DSTAR:
    439 			done = 1;
    440 			break;
    441 		default:
    442 			printf("Error unknown state\n");
    443 			break;
    444 		}
    445 
    446 		printf("[%3d] ", devno);
    447 		userconf_pdevnam(devno);
    448 		if (done) {
    449 			printf(" already");
    450 		} else {
    451 			/* XXX add cmd 'd' <devno> eoc */
    452 			userconf_hist_cmd('d');
    453 			userconf_hist_int(devno);
    454 			userconf_hist_eoc();
    455 		}
    456 		printf(" disabled\n");
    457 	} else {
    458 		printf("Unknown devno (max is %d)\n", userconf_maxdev);
    459 	}
    460 }
    461 
    462 static void
    463 userconf_enable(int devno)
    464 {
    465 	int done = 0;
    466 
    467 	if (devno <= userconf_maxdev) {
    468 		switch (cfdata[devno].cf_fstate) {
    469 		case FSTATE_DNOTFOUND:
    470 			cfdata[devno].cf_fstate = FSTATE_NOTFOUND;
    471 			break;
    472 		case FSTATE_DSTAR:
    473 			cfdata[devno].cf_fstate = FSTATE_STAR;
    474 			break;
    475 		case FSTATE_NOTFOUND:
    476 		case FSTATE_STAR:
    477 			done = 1;
    478 			break;
    479 		default:
    480 			printf("Error unknown state\n");
    481 			break;
    482 		}
    483 
    484 		printf("[%3d] ", devno);
    485 		userconf_pdevnam(devno);
    486 		if (done) {
    487 			printf(" already");
    488 		} else {
    489 			/* XXX add cmd 'e' <devno> eoc */
    490 			userconf_hist_cmd('d');
    491 			userconf_hist_int(devno);
    492 			userconf_hist_eoc();
    493 		}
    494 		printf(" enabled\n");
    495 	} else {
    496 		printf("Unknown devno (max is %d)\n", userconf_maxdev);
    497 	}
    498 }
    499 
    500 static void
    501 userconf_help(void)
    502 {
    503 	int j = 0, k;
    504 
    505 	printf("command   args                description\n");
    506 	while (*userconf_cmds[j] != '\0') {
    507 		printf(userconf_cmds[j]);
    508 		k = strlen(userconf_cmds[j]);
    509 		while (k < 10) {
    510 			printf(" ");
    511 			k++;
    512 		}
    513 		switch (*userconf_cmds[j+1]) {
    514 		case 'L':
    515 			printf("[count]             number of lines before more");
    516 			break;
    517 		case 'b':
    518 			printf("8|10|16             base on large numbers");
    519 			break;
    520 		case 'c':
    521 			printf("devno|dev           change devices");
    522 			break;
    523 		case 'd':
    524 			printf("devno|dev           disable devices");
    525 			break;
    526 		case 'e':
    527 			printf("devno|dev           enable devices");
    528 			break;
    529 		case 'f':
    530 			printf("devno|dev           find devices");
    531 			break;
    532 		case 'h':
    533 			printf("                    this message");
    534 			break;
    535 		case 'l':
    536 			printf("                    list configuration");
    537 			break;
    538 		case 'q':
    539 			printf("                    leave userconf");
    540 			break;
    541 		default:
    542 			printf("                    don't know");
    543 			break;
    544 		}
    545 		printf("\n");
    546 		j += 2;
    547 	}
    548 }
    549 
    550 static void
    551 userconf_list(void)
    552 {
    553 	int i = 0;
    554 
    555 	userconf_cnt = 0;
    556 
    557 	while (cfdata[i].cf_name != NULL) {
    558 		if (userconf_more())
    559 			break;
    560 		userconf_pdev(i++);
    561 	}
    562 
    563 	userconf_cnt = -1;
    564 }
    565 
    566 static void
    567 userconf_common_dev(char *dev, int len, short unit, short state, char routine)
    568 {
    569 	int i = 0;
    570 
    571 	switch (routine) {
    572 	case UC_CHANGE:
    573 		break;
    574 	default:
    575 		userconf_cnt = 0;
    576 		break;
    577 	}
    578 
    579 	while (cfdata[i].cf_name != NULL) {
    580 		if (strlen(cfdata[i].cf_name) == len) {
    581 
    582 			/*
    583 			 * Ok, if device name is correct
    584 			 *  If state == FSTATE_FOUND, look for "dev"
    585 			 *  If state == FSTATE_STAR, look for "dev*"
    586 			 *  If state == FSTATE_NOTFOUND, look for "dev0"
    587 			 */
    588 			if (strncasecmp(dev, cfdata[i].cf_name,
    589 					len) == 0 &&
    590 			    (state == FSTATE_FOUND ||
    591 			     (state == FSTATE_STAR &&
    592 			      (cfdata[i].cf_fstate == FSTATE_STAR ||
    593 			       cfdata[i].cf_fstate == FSTATE_DSTAR)) ||
    594 			     (state == FSTATE_NOTFOUND &&
    595 			      cfdata[i].cf_unit == unit &&
    596 			      (cfdata[i].cf_fstate == FSTATE_NOTFOUND ||
    597 			       cfdata[i].cf_fstate == FSTATE_DNOTFOUND)))) {
    598 				if (userconf_more())
    599 					break;
    600 				switch (routine) {
    601 				case UC_CHANGE:
    602 					userconf_change(i);
    603 					break;
    604 				case UC_ENABLE:
    605 					userconf_enable(i);
    606 					break;
    607 				case UC_DISABLE:
    608 					userconf_disable(i);
    609 					break;
    610 				case UC_FIND:
    611 					userconf_pdev(i);
    612 					break;
    613 				default:
    614 					printf("Unknown routine /%c/\n",
    615 					    routine);
    616 					break;
    617 				}
    618 			}
    619 		}
    620 		i++;
    621 	}
    622 
    623 	switch (routine) {
    624 	case UC_CHANGE:
    625 		break;
    626 	default:
    627 		userconf_cnt = -1;
    628 		break;
    629 	}
    630 }
    631 
    632 #if 0
    633 static void
    634 userconf_add_read(char *prompt, char field, char *dev, int len, int *val)
    635 {
    636 	int ok = 0;
    637 	int a;
    638 	char *c;
    639 
    640 	*val = -1;
    641 
    642 	while (!ok) {
    643 		printf("%s ? ", prompt);
    644 
    645 		getsn(userconf_argbuf, sizeof(userconf_argbuf));
    646 
    647 		c = userconf_argbuf;
    648 		while (*c == ' ' || *c == '\t' || *c == '\n') c++;
    649 
    650 		if (*c != '\0') {
    651 			if (userconf_number(c, &a) == 0) {
    652 				if (a > userconf_maxdev) {
    653 					printf("Unknown devno (max is %d)\n",
    654 					    userconf_maxdev);
    655 				} else if (strncasecmp(dev,
    656 				    cfdata[a].cf_name, len) != 0 &&
    657 					field == 'a') {
    658 					printf("Not same device type\n");
    659 				} else {
    660 					*val = a;
    661 					ok = 1;
    662 				}
    663 			} else if (*c == '?') {
    664 				userconf_common_dev(dev, len, 0,
    665 				    FSTATE_FOUND, UC_FIND);
    666 			} else if (*c == 'q' || *c == 'Q') {
    667 				ok = 1;
    668 			} else {
    669 				printf("Unknown argument\n");
    670 			}
    671 		} else {
    672 			ok = 1;
    673 		}
    674 	}
    675 }
    676 #endif /* 0 */
    677 
    678 static int
    679 userconf_parse(char *cmd)
    680 {
    681 	char *c, *v;
    682 	int i = 0, j = 0, k, a;
    683 	short unit, state;
    684 
    685 	c = cmd;
    686 	while (*c == ' ' || *c == '\t')
    687 		c++;
    688 	v = c;
    689 	while (*c != ' ' && *c != '\t' && *c != '\n' && *c != '\0') {
    690 		c++;
    691 		i++;
    692 	}
    693 
    694 	k = -1;
    695 	while (*userconf_cmds[j] != '\0') {
    696 		if (strlen(userconf_cmds[j]) == i) {
    697 			if (strncasecmp(v, userconf_cmds[j], i) == 0)
    698 				k = j;
    699 		}
    700 		j += 2;
    701 	}
    702 
    703 	while (*c == ' ' || *c == '\t' || *c == '\n')
    704 		c++;
    705 
    706 	if (k == -1) {
    707 		if (*v != '\n')
    708 			printf("Unknown command, try help\n");
    709 	} else {
    710 		switch (*userconf_cmds[k+1]) {
    711 		case 'L':
    712 			if (*c == '\0')
    713 				printf("Argument expected\n");
    714 			else if (userconf_number(c, &a) == 0)
    715 				userconf_lines = a;
    716 			else
    717 				printf("Unknown argument\n");
    718 			break;
    719 		case 'b':
    720 			if (*c == '\0')
    721 				printf("8|10|16 expected\n");
    722 			else if (userconf_number(c, &a) == 0) {
    723 				if (a == 8 || a == 10 || a == 16) {
    724 					userconf_base = a;
    725 				} else {
    726 					printf("8|10|16 expected\n");
    727 				}
    728 			} else
    729 				printf("Unknown argument\n");
    730 			break;
    731 		case 'c':
    732 			if (*c == '\0')
    733 				printf("DevNo or Dev expected\n");
    734 			else if (userconf_number(c, &a) == 0)
    735 				userconf_change(a);
    736 			else if (userconf_device(c, &a, &unit, &state) == 0)
    737 				userconf_common_dev(c, a, unit, state, UC_CHANGE);
    738 			else
    739 				printf("Unknown argument\n");
    740 			break;
    741 		case 'd':
    742 			if (*c == '\0')
    743 				printf("Attr, DevNo or Dev expected\n");
    744 			else if (userconf_number(c, &a) == 0)
    745 				userconf_disable(a);
    746 			else if (userconf_device(c, &a, &unit, &state) == 0)
    747 				userconf_common_dev(c, a, unit, state, UC_DISABLE);
    748 			else
    749 				printf("Unknown argument\n");
    750 			break;
    751 		case 'e':
    752 			if (*c == '\0')
    753 				printf("Attr, DevNo or Dev expected\n");
    754 			else if (userconf_number(c, &a) == 0)
    755 				userconf_enable(a);
    756 			else if (userconf_device(c, &a, &unit, &state) == 0)
    757 				userconf_common_dev(c, a, unit, state, UC_ENABLE);
    758 			else
    759 				printf("Unknown argument\n");
    760 			break;
    761 		case 'f':
    762 			if (*c == '\0')
    763 				printf("DevNo or Dev expected\n");
    764 			else if (userconf_number(c, &a) == 0)
    765 				userconf_pdev(a);
    766 			else if (userconf_device(c, &a, &unit, &state) == 0)
    767 				userconf_common_dev(c, a, unit, state, UC_FIND);
    768 			else
    769 				printf("Unknown argument\n");
    770 			break;
    771 		case 'h':
    772 			userconf_help();
    773 			break;
    774 		case 'l':
    775 			if (*c == '\0')
    776 				userconf_list();
    777 			else
    778 				printf("Unknown argument\n");
    779 			break;
    780 		case 'q':
    781 			/* XXX add cmd 'q' eoc */
    782 			userconf_hist_cmd('q');
    783 			userconf_hist_eoc();
    784 			return(-1);
    785 		case 's':
    786 		default:
    787 			printf("Unknown command\n");
    788 			break;
    789 		}
    790 	}
    791 	return(0);
    792 }
    793 
    794 extern void user_config(void);
    795 
    796 void
    797 user_config(void)
    798 {
    799 	char prompt[] = "uc> ";
    800 
    801 	userconf_init();
    802 	printf("userconf: configure system autoconfiguration:\n");
    803 
    804 	while (1) {
    805 		printf(prompt);
    806 		if (getsn(userconf_cmdbuf, sizeof(userconf_cmdbuf)) > 0 &&
    807 		    userconf_parse(userconf_cmdbuf))
    808 			break;
    809 	}
    810 	printf("Continuing...\n");
    811 }
    812 
    813 /*
    814  * XXX shouldn't this be a common function?
    815  */
    816 static int
    817 getsn(char *cp, int size)
    818 {
    819 	char *lp;
    820 	int c, len;
    821 
    822 	cnpollc(1);
    823 
    824 	lp = cp;
    825 	len = 0;
    826 	for (;;) {
    827 		c = cngetc();
    828 		switch (c) {
    829 		case '\n':
    830 		case '\r':
    831 			printf("\n");
    832 			*lp++ = '\0';
    833 			cnpollc(0);
    834 			return (len);
    835 		case '\b':
    836 		case '\177':
    837 		case '#':
    838 			if (len) {
    839 				--len;
    840 				--lp;
    841 				printf("\b \b");
    842 			}
    843 			continue;
    844 		case '@':
    845 		case 'u'&037:
    846 			len = 0;
    847 			lp = cp;
    848 			printf("\n");
    849 			continue;
    850 		default:
    851 			if (len + 1 >= size || c < ' ') {
    852 				printf("\007");
    853 				continue;
    854 			}
    855 			printf("%c", c);
    856 			++len;
    857 			*lp++ = c;
    858 		}
    859 	}
    860 }
    861