/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident	"%Z%%M%	%I%	%E% SMI"


/*
 *	Usage: kbd [-r] [-t] [-l] [-i] [-c on|off] [-a enable|disable|alternate]
 *		    [-d keyboard device]
 *	-r			reset the keyboard as if power-up
 *	-t			return the type of the keyboard being used
 *	-l			return the layout of the keyboard being used,
 *				and the Autorepeat settings
 *	-i			read in the default configuration file
 *	-c on|off		turn on|off clicking
 *	-a enable|disable|alternate	sets abort sequence
 *	-D autorepeat delay	sets autorepeat dealy, unit in ms
 *	-R autorepeat rate	sets autorepeat rate, unit in ms
 *	-d keyboard device	chooses the kbd device, default /dev/kbd.
 *	-s keyboard layout	sets keyboard layout
 */

#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/kbio.h>
#include <sys/kbd.h>
#include <stdio.h>
#include <fcntl.h>
#include <deflt.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <stropts.h>

#define	KBD_DEVICE	"/dev/kbd"		/* default keyboard device */
#define	DEF_FILE	"/etc/default/kbd"	/* kbd defaults file	*/
#define	DEF_ABORT	"KEYBOARD_ABORT="
#define	DEF_CLICK	"KEYCLICK="
#define	DEF_RPTDELAY	"REPEAT_DELAY="
#define	DEF_RPTRATE	"REPEAT_RATE="
#define	DEF_LAYOUT	"LAYOUT="

#define	KBD_LAYOUT_FILE  "/usr/share/lib/keytables/type_6/kbd_layouts"
#define	MAX_LAYOUT_NUM		128
#define	MAX_LINE_SIZE		256
#define	DEFAULT_KBD_LAYOUT	33

char *layout_names[MAX_LAYOUT_NUM];
int layout_numbers[MAX_LAYOUT_NUM];
static int layout_count;
static int default_layout_number = 0;

static void reset(int);
static void get_type(int);
static void get_layout(int);
static void kbd_defaults(int);
static void usage(void);

static int click(char *, int);
static int abort_enable(char *, int);
static int set_repeat_delay(char *, int);
static int set_repeat_rate(char *, int);

static int get_layout_number(char *);
static int set_layout(int, int);
static int get_layouts(void);
static int set_kbd_layout(int, char *);

int
main(int argc, char **argv)
{
	int c, error;
	int rflag, tflag, lflag, cflag, dflag, aflag, iflag, errflag,
	    Dflag, Rflag, rtlacDRflag, sflag;
	char *copt, *aopt, *delay, *rate, *layout_name;
	char *kbdname = KBD_DEVICE;
	int kbd;
	extern char *optarg;
	extern int optind;

	rflag = tflag = cflag = dflag = aflag = iflag = errflag = lflag =
	    Dflag = Rflag = sflag = 0;
	copt = aopt = (char *)0;

	while ((c = getopt(argc, argv, "rtlisc:a:d:D:R:")) != EOF) {
		switch (c) {
		case 'r':
			rflag++;
			break;
		case 't':
			tflag++;
			break;
		case 'l':
			lflag++;
			break;
		case 'i':
			iflag++;
			break;
		case 's':
			sflag++;
			break;
		case 'c':
			copt = optarg;
			cflag++;
			break;
		case 'a':
			aopt = optarg;
			aflag++;
			break;
		case 'd':
			kbdname = optarg;
			dflag++;
			break;
		case 'D':
			delay = optarg;
			Dflag++;
			break;
		case 'R':
			rate = optarg;
			Rflag++;
			break;
		case '?':
			errflag++;
			break;
		}
	}

	/*
	 * Check for valid arguments:
	 *
	 * If argument parsing failed or if there are left-over
	 * command line arguments(except -s option), then we're done now.
	 */
	if (errflag != 0 || ((sflag == 0) && (argc != optind))) {
		usage();
		exit(1);
	}

	/*
	 * kbd requires that the user specify either "-i" or "-s" or at
	 * least one of -[rtlacDR].  The "-d" option is, well, optional.
	 * We don't care if it's there or not.
	 */
	rtlacDRflag = rflag + tflag + lflag + aflag + cflag + Dflag + Rflag;
	if (!((iflag != 0 && sflag == 0 && rtlacDRflag == 0) ||
	    (iflag == 0 && sflag != 0 && dflag == 0 && rtlacDRflag == 0) ||
	    (iflag == 0 && sflag == 0 && rtlacDRflag != 0))) {
		usage();
		exit(1);
	}

	if (Dflag && atoi(delay) <= 0) {
		(void) fprintf(stderr, "Invalid arguments: -D %s\n", delay);
		usage();
		exit(1);
	}

	if (Rflag && atoi(rate) <= 0) {
		(void) fprintf(stderr, "Invalid arguments: -R %s\n", rate);
		usage();
		exit(1);
	}

	/*
	 * Open the keyboard device
	 */
	if ((kbd = open(kbdname, O_RDWR)) < 0) {
		perror("opening the keyboard");
		(void) fprintf(stderr, "kbd: Cannot open %s\n", kbdname);
		exit(1);
	}

	if (iflag) {
		kbd_defaults(kbd);
		exit(0);	/* A mutually exclusive option */
		/*NOTREACHED*/
	}

	if (tflag)
		get_type(kbd);

	if (lflag)
		get_layout(kbd);

	if (cflag && (error = click(copt, kbd)) != 0)
		exit(error);

	if (rflag)
		reset(kbd);

	if (aflag && (error = abort_enable(aopt, kbd)) != 0)
		exit(error);

	if (Dflag && (error = set_repeat_delay(delay, kbd)) != 0)
		exit(error);

	if (Rflag && (error = set_repeat_rate(rate, kbd)) != 0)
		exit(error);

	if (sflag) {
		if (argc == optind) {
			layout_name = NULL;
		} else if (argc == (optind + 1)) {
			layout_name = argv[optind];
		} else {
			usage();
			exit(1);
		}

		if ((error = set_kbd_layout(kbd, layout_name)) != 0)
			exit(error);
	}

	return (0);
}

/*
 * this routine gets the type of the keyboard being used
 */
static int
set_kbd_layout(int kbd, char *layout_name)
{
	int layout_num;
	int error = 1;

	/* get the language info from the layouts file */
	if (get_layouts() != 0)
		return (error);

	if (layout_name != NULL) {
		if ((layout_num = get_layout_number(layout_name)) == -1) {
			(void) fprintf(stderr, "%s: unknown layout name\n"
				    "Please refer to 'kbd -s' to get the "
				    "supported layouts.\n", layout_name);
			return (error);
		}
	} else {
			int i, j, print_cnt, input_num;
			boolean_t input_right = B_TRUE;
			boolean_t default_input = B_FALSE;
			char input[8]; /* 8 chars is enough for numbers */

			print_cnt = (layout_count % 2) ?
				layout_count/2+1 : layout_count/2;

			for (i = 1; i <= print_cnt; i++) {
				(void) printf("%2d. %-30s", i,
					    layout_names[i-1]);
				j = i + print_cnt;
				if (j <= layout_count) {
					(void) printf("%-2d. %-30s\n", j,
						    layout_names[j-1]);
				}
			}
			(void) printf("\nTo select the keyboard layout, enter"
				    " a number [default %d]:",
				    default_layout_number+1);

			for (;;) {
				if (input_right == B_FALSE)
					(void) printf("Invalid input. Please "
					    "input a number (1,2,...):");
				(void) memset(input, 0, 8);
				(void) fflush(stdin);
				(void) fgets(input, 8, stdin);
				if (strlen(input) > 4) {
					input_right = B_FALSE;
					continue;
				}
				if (input[0] == '\n') {
					default_input = B_TRUE;
					break;
				}
				input_right = B_TRUE;
				/* check if the inputs are numbers 0~9 */
				for (i = 0; i < (strlen(input) - 1); i++) {
					if ((input[i] < '0') ||
					    (input[i] > '9')) {
						input_right = B_FALSE;
						break;
					}
				}
				if (input_right == B_FALSE)
					continue;
				input_num = atoi(input);
				if ((input_num > 0) &&
				    (input_num <= layout_count))
					break;
				else
					input_right = B_FALSE;
			}
			if (default_input == B_TRUE)
				layout_num = DEFAULT_KBD_LAYOUT;
			else
				layout_num = layout_numbers[--input_num];
	}

	if ((error = set_layout(kbd, layout_num)) != 0)
		return (error);

	return (0);
}

/*
 * this routine resets the state of the keyboard as if power-up
 */
static void
reset(int kbd)
{
	int cmd;

	cmd = KBD_CMD_RESET;

	if (ioctl(kbd, KIOCCMD, &cmd)) {
		perror("kbd: ioctl error");
		exit(1);
	}

}

/*
 * this routine gets the type of the keyboard being used
 */
static void
get_type(int kbd)
{
	int kbd_type;

	if (ioctl(kbd, KIOCTYPE, &kbd_type)) {
		perror("ioctl (kbd type)");
		exit(1);
	}

	switch (kbd_type) {

	case KB_SUN3:
		(void) printf("Type 3 Sun keyboard\n");
		break;

	case KB_SUN4:
		(void) printf("Type 4 Sun keyboard\n");
		break;

	case KB_ASCII:
		(void) printf("ASCII\n");
		break;

	case KB_PC:
		(void) printf("PC\n");
		break;

	case KB_USB:
		(void) printf("USB keyboard\n");
		break;

	default:
		(void) printf("Unknown keyboard type\n");
		break;
	}
}

/*
 * this routine gets the layout of the keyboard being used
 * also, included the autorepeat delay and rate being used
 */
static void
get_layout(int kbd)
{
	int kbd_type;
	int kbd_layout;
	/* these two variables are used for getting delay&rate */
	int delay, rate;
	delay = rate = 0;

	if (ioctl(kbd, KIOCTYPE, &kbd_type)) {
		perror("ioctl (kbd type)");
		exit(1);
	}

	if (ioctl(kbd, KIOCLAYOUT, &kbd_layout)) {
		perror("ioctl (kbd layout)");
		exit(1);
	}

	(void) printf("type=%d\nlayout=%d (0x%.2x)\n",
	    kbd_type, kbd_layout, kbd_layout);

	/* below code is used to get the autorepeat delay and rate */
	if (ioctl(kbd, KIOCGRPTDELAY, &delay)) {
		perror("ioctl (kbd get repeat delay)");
		exit(1);
	}

	if (ioctl(kbd, KIOCGRPTRATE, &rate)) {
		perror("ioctl (kbd get repeat rate)");
		exit(1);
	}

	(void) printf("delay(ms)=%d\n", delay);
	(void) printf("rate(ms)=%d\n", rate);
}

/*
 * this routine enables or disables clicking of the keyboard
 */
static int
click(char *copt, int kbd)
{
	int cmd;

	if (strcmp(copt, "on") == 0)
		cmd = KBD_CMD_CLICK;
	else if (strcmp(copt, "off") == 0)
		cmd = KBD_CMD_NOCLICK;
	else {
		(void) fprintf(stderr, "wrong option -- %s\n", copt);
		usage();
		return (1);
	}

	if (ioctl(kbd, KIOCCMD, &cmd)) {
		perror("kbd ioctl (keyclick)");
		return (1);
	}
	return (0);
}

/*
 * this routine enables/disables/sets BRK or abort sequence feature
 */
static int
abort_enable(char *aopt, int kbd)
{
	int enable;

	if (strcmp(aopt, "alternate") == 0)
		enable = KIOCABORTALTERNATE;
	else if (strcmp(aopt, "enable") == 0)
		enable = KIOCABORTENABLE;
	else if (strcmp(aopt, "disable") == 0)
		enable = KIOCABORTDISABLE;
	else {
		(void) fprintf(stderr, "wrong option -- %s\n", aopt);
		usage();
		return (1);
	}

	if (ioctl(kbd, KIOCSKABORTEN, &enable)) {
		perror("kbd ioctl (abort enable)");
		return (1);
	}
	return (0);
}

/*
 * this routine set autorepeat delay
 */
static int
set_repeat_delay(char *delay_str, int kbd)
{
	int delay = atoi(delay_str);

	/*
	 * The error message depends on the different inputs.
	 * a. the input is a invalid integer(unit in ms)
	 * b. the input is a integer less than the minimal delay setting.
	 * The condition (a) has been covered by main function and set_default
	 * function.
	 */
	if (ioctl(kbd, KIOCSRPTDELAY, &delay) == -1) {
		if (delay < KIOCRPTDELAY_MIN)
			(void) fprintf(stderr, "kbd: specified delay %d is "
			    "less than minimum %d\n", delay, KIOCRPTDELAY_MIN);
		else
			perror("kbd: set repeat delay");
		return (1);
	}

	return (0);
}

/*
 * this routine set autorepeat rate
 */
static int
set_repeat_rate(char *rate_str, int kbd)
{
	int rate = atoi(rate_str);

	/*
	 * The error message depends on the different inputs.
	 * a. the input is a invalid integer(unit in ms)
	 * b. the input is a integer less than the minimal rate setting.
	 * The condition (a) has been covered by main function and set_default
	 * function.
	 */
	if (ioctl(kbd, KIOCSRPTRATE, &rate) == -1) {
		if (rate < KIOCRPTRATE_MIN)
			(void) fprintf(stderr, "kbd: specified rate %d is "
			    "less than minimum %d\n", rate, KIOCRPTRATE_MIN);
		else
			perror("kbd: set repeat rate");
		return (1);
	}

	return (0);
}

#define	BAD_DEFAULT	"kbd: bad default value for %s: %s\n"

static void
kbd_defaults(int kbd)
{
	char *p;
	int layout_num;

	if (defopen(DEF_FILE) != 0) {
		(void) fprintf(stderr, "Can't open default file: %s\n",
		    DEF_FILE);
		exit(1);
	}

	p = defread(DEF_CLICK);
	if (p != NULL) {
		/*
		 * KEYCLICK must equal "on" or "off"
		 */
		if ((strcmp(p, "on") == 0) || (strcmp(p, "off") == 0))
			(void) click(p, kbd);
		else
			(void) fprintf(stderr, BAD_DEFAULT, DEF_CLICK, p);
	}

	p = defread(DEF_ABORT);
	if (p != NULL) {
		/*
		 * ABORT must equal "enable", "disable" or "alternate"
		 */
		if ((strcmp(p, "enable") == 0) ||
		    (strcmp(p, "alternate") == 0) ||
		    (strcmp(p, "disable") == 0))
			(void) abort_enable(p, kbd);
		else
			(void) fprintf(stderr, BAD_DEFAULT, DEF_ABORT, p);
	}

	p = defread(DEF_RPTDELAY);
	if (p != NULL) {
		/*
		 * REPEAT_DELAY unit in ms
		 */
		if (atoi(p) > 0)
			(void) set_repeat_delay(p, kbd);
		else
			(void) fprintf(stderr, BAD_DEFAULT, DEF_RPTDELAY, p);
	}

	p = defread(DEF_RPTRATE);
	if (p != NULL) {
		/*
		 * REPEAT_RATE unit in ms
		 */
		if (atoi(p) > 0)
			(void) set_repeat_rate(p, kbd);
		else
			(void) fprintf(stderr, BAD_DEFAULT, DEF_RPTRATE, p);
	}

	p = defread(DEF_LAYOUT);
	if (p != NULL) {
		/*
		 * LAYOUT must be one of the layouts supported in kbd_layouts
		 */
		if (get_layouts() != 0)
			return;

		if ((layout_num = get_layout_number(p)) == -1) {
			(void) fprintf(stderr, BAD_DEFAULT, DEF_LAYOUT, p);
			return;
		}

		(void) set_layout(kbd, layout_num);
	}
}

static int
get_layout_number(char *layout)
{
	int i;
	int layout_number = -1;

	for (i = 0; i < layout_count; i ++) {
		if (strcmp(layout, layout_names[i]) == 0) {
			layout_number = layout_numbers[i];
			break;
		}
	}

	return (layout_number);
}

static int
get_layouts()
{
	FILE *stream;
	char buffer[MAX_LINE_SIZE];
	char *result = NULL;
	int  i = 0;
	char *tmpbuf;

	if ((stream = fopen(KBD_LAYOUT_FILE, "r")) == 0) {
		perror(KBD_LAYOUT_FILE);
		return (1);
	}

	while ((fgets(buffer, MAX_LINE_SIZE, stream) != NULL) &&
	    (i < MAX_LAYOUT_NUM)) {
		if (buffer[0] == '#')
			continue;
		if ((result = strtok(buffer, "=")) == NULL)
			continue;
		if ((tmpbuf = strdup(result)) != NULL) {
			layout_names[i] = tmpbuf;
		} else {
			perror("out of memory getting layout names");
			return (1);
		}
		if ((result = strtok(NULL, "\n")) == NULL)
			continue;
		layout_numbers[i] = atoi(result);
		if (strcmp(tmpbuf, "US-English") == 0)
			default_layout_number = i;
		i++;
	}
	layout_count = i;

	return (0);
}

/*
 * this routine sets the layout of the keyboard being used
 */
static int
set_layout(int kbd, int layout_num)
{

	if (ioctl(kbd, KIOCSLAYOUT, layout_num)) {
		perror("ioctl (set kbd layout)");
		return (1);
	}

	return (0);
}

static char *usage1 = "kbd [-r] [-t] [-l] [-a enable|disable|alternate]";
static char *usage2 = "    [-c on|off][-D delay][-R rate][-d keyboard device]";
static char *usage3 = "kbd -i [-d keyboard device]";
static char *usage4 = "kbd -s [language]";

static void
usage(void)
{
	(void) fprintf(stderr, "Usage:\t%s\n\t%s\n\t%s\n\t%s\n", usage1, usage2,
	    usage3, usage4);
}