/*      $NetBSD: wsconsctl.c,v 1.19 2018/11/23 06:31:57 mlelstv Exp $ */

/*-
 * Copyright (c) 1998, 2004 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Juergen Hannken-Illjes.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/cdefs.h>
#include <err.h>
#include <fcntl.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#include "wsconsctl.h"

#define PATH_KEYBOARD           "/dev/wskbd"
#define PATH_MOUSE              "/dev/wsmouse"
#define PATH_DISPLAY            "/dev/ttyE0"

extern struct field keyboard_field_tab[];
extern struct field mouse_field_tab[];
extern struct field display_field_tab[];
extern int keyboard_field_tab_len;
extern int mouse_field_tab_len;
extern int display_field_tab_len;

static void usage(const char *) __dead;

static void
usage(const char *msg)
{
        const char *progname = getprogname();

        if (msg != NULL)
                (void)fprintf(stderr, "%s: %s\n\n", progname, msg);

        (void)fprintf(stderr,
            "Usage: %s [-kmd] [-f file] [-n] name ...\n"
            " -or-  %s [-kmd] [-f file] [-n] -w name=value ...\n"
            " -or-  %s [-kmd] [-f file] [-n] -w name+=value ...\n"
            " -or-  %s [-kmd] [-f file] [-n] -a\n",
            progname, progname, progname, progname);

        exit(EXIT_FAILURE);
}

int
main(int argc, char **argv)
{
        int i, ch, fd;
        int aflag, dflag, kflag, mflag, wflag;
        char *p;
        const char *sep, *file;
        struct field *f, *field_tab;
        int do_merge, field_tab_len;
        void (*getval)(int);
        void (*putval)(int);

        aflag = 0;
        dflag = 0;
        kflag = 0;
        mflag = 0;
        wflag = 0;
        file = NULL;
        sep = "=";
        field_tab = NULL;
        field_tab_len = 0;
        getval = NULL;
        putval = NULL;

        while ((ch = getopt(argc, argv, "adf:kmnw")) != -1) {
                switch(ch) {
                case 'a':
                        aflag = 1;
                        break;
                case 'd':
                        dflag = 1;
                        break;
                case 'f':
                        file = optarg;
                        break;
                case 'k':
                        kflag = 1;
                        break;
                case 'm':
                        mflag = 1;
                        break;
                case 'n':
                        sep = NULL;
                        break;
                case 'w':
                        wflag = 1;
                        break;
                case '?':
                default:
                        usage(NULL);
                }
        }

        argc -= optind;
        argv += optind;

        if (dflag + kflag + mflag == 0)
                kflag = 1;
        if (dflag + kflag + mflag > 1)
                usage("only one of -k, -d or -m may be given");
        if (argc > 0 && aflag != 0)
                usage("excess arguments after -a");
        if (aflag != 0 && wflag != 0)
                usage("only one of -a or -w may be given");

        if (kflag) {
                if (file == NULL)
                        file = PATH_KEYBOARD;
                field_tab = keyboard_field_tab;
                field_tab_len = keyboard_field_tab_len;
                getval = keyboard_get_values;
                putval = keyboard_put_values;
        } else if (mflag) {
                if (file == NULL)
                        file = PATH_MOUSE;
                field_tab = mouse_field_tab;
                field_tab_len = mouse_field_tab_len;
                getval = mouse_get_values;
                putval = mouse_put_values;
        } else if (dflag) {
                if (file == NULL)
                        file = PATH_DISPLAY;
                field_tab = display_field_tab;
                field_tab_len = display_field_tab_len;
                getval = display_get_values;
                putval = display_put_values;
        }

        field_setup(field_tab, field_tab_len);

        fd = open(file, O_WRONLY);
        if (fd < 0)
                fd = open(file, O_RDONLY);
        if (fd < 0)
                err(EXIT_FAILURE, "%s", file);

        if (aflag != 0) {
                for (i = 0; i < field_tab_len; i++)
                        if ((field_tab[i].flags & (FLG_NOAUTO|FLG_WRONLY)) == 0)
                                field_tab[i].flags |= FLG_GET;
                (*getval)(fd);
                for (i = 0; i < field_tab_len; i++)
                        if (field_tab[i].flags & FLG_NOAUTO)
                                warnx("\"%s\" not shown with -a; use \"%s %s\""
                                    " to view.",
                                    field_tab[i].name,
                                    getprogname(), field_tab[i].name);
                        else if (field_tab[i].flags & FLG_GET &&
                                 !(field_tab[i].flags & FLG_DISABLED))
                                pr_field(field_tab + i, sep);
        } else if (argc > 0) {
                if (wflag != 0) {
                        for (i = 0; i < argc; i++) {
                                p = strchr(argv[i], '=');
                                if (p == NULL)
                                        errx(EXIT_FAILURE, "'=' not found");
                                if (p > argv[i] && *(p - 1) == '+') {
                                        *(p - 1) = '\0';
                                        do_merge = 1;
                                } else
                                        do_merge = 0;
                                *p++ = '\0';
                                f = field_by_name(argv[i]);
                                if ((f->flags & FLG_RDONLY) != 0)
                                        errx(EXIT_FAILURE, "%s: read only",
                                            argv[i]);
                                if (do_merge) {
                                        if ((f->flags & FLG_MODIFY) == 0)
                                                errx(EXIT_FAILURE,
                                                    "%s: can only be set",
                                                    argv[i]);
                                        f->flags |= FLG_GET;
                                        (*getval)(fd);
                                        f->flags &= ~FLG_GET;
                                }
                                rd_field(f, p, do_merge);
                                f->flags |= FLG_SET;
                                if (do_merge)
                                        f->flags |= FLG_MODIFIED;
                                (*putval)(fd);
                                f->flags &= ~(FLG_SET | FLG_MODIFIED);
                        }
                } else {
                        for (i = 0; i < argc; i++) {
                                f = field_by_name(argv[i]);
                                if ((f->flags & FLG_WRONLY) != 0)
                                        errx(EXIT_FAILURE, "%s: write only",
                                            argv[i]);
                                f->flags |= FLG_GET;
                        }
                        (*getval)(fd);
                        for (i = 0; i < field_tab_len; i++) {
                                if (field_tab[i].flags & FLG_DISABLED)
                                        errx(EXIT_FAILURE,
                                            "%s: no kernel support",
                                            field_tab[i].name);
                                if (field_tab[i].flags & FLG_GET)
                                        pr_field(field_tab + i, sep);
                        }
                }
        } else {
                close(fd);
                usage(NULL);
        }

        close(fd);

        return EXIT_SUCCESS;
}