/*
 * LP (Laptop Package)
 *
 * Copyright (C) 1994 by HOSOKAWA Tatasumi <hosokawa@mt.cs.keio.ac.jp>
 *
 * This software may be used, modified, copied, distributed, and sold,
 * in both source and binary form provided that the above copyright and
 * these terms are retained. Under no circumstances is the author
 * responsible for the proper functioning of this software, nor does
 * the author assume any responsibility for damages incurred with its
 * use.
 *
 * Sep., 1994	Implemented on FreeBSD 1.1.5.1R (Toshiba AVS001WD)
 */

#include <stdio.h>
#include <string.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <machine/apm_bios.h>

#define APMDEV	"/dev/apm0"

int main_argc;
char **main_argv;

void apm_suspend(int fd)
{
	if (ioctl(fd, APMIO_SUSPEND, NULL) == -1) {
		fprintf(stderr, "%s: ioctl APMIO_SUSPEND failed.\n", main_argv[0]);
		exit(1);
	}
}

void apm_getinfo(int fd, apm_info_t aip)
{
	if (ioctl(fd, APMIO_GETINFO, aip) == -1) {
		fprintf(stderr, "%s: ioctl APMIO_GETINFO failed.\n", main_argv[0]);
		exit(1);
	}
}

void print_all_info(apm_info_t aip)
{
	printf("APM version: %d.%d\n", aip->ai_major, aip->ai_minor);
	printf("AC Line status: ");
	if (aip->ai_acline == 255) {
		printf("unknown");
	}
	else if (aip->ai_acline > 1) {
		printf("invalid value (0x%x)", aip->ai_acline);
	}
	else {
		static char messages[][10] = {"off-line", "on-line"};
		printf("%s", messages[aip->ai_acline]);
	}
	printf("\n");
	printf("Battery status: ");
	if (aip->ai_batt_stat == 255) {
		printf("unknown");
	}
	else if (aip->ai_batt_stat > 3) {
		printf("invalid value (0x%x)", aip->ai_batt_stat);
	}
	else {
		static char messages[][10] = {"high", "low", "critical", "charging"};
		printf("%s", messages[aip->ai_batt_stat]);
	}
	printf("\n");
	printf("Remaining battery life: ");
	if (aip->ai_batt_life == 255) {
		printf("unknown");
	}
	else if (aip->ai_batt_life <= 100) {
		printf("%d%%", aip->ai_batt_life);
	}
	else {
		printf("invalid value (0x%x)", aip->ai_batt_life);
	}
	printf("\n");
}

int main(int argc, char *argv[])
{
	int i, j, fd;
	int sleep = 0, all_info = 1, batt_status = 0, batt_life = 0, ac_status = 0;
	char *cmdname;

	main_argc = argc;
	main_argv = argv;
	if ((cmdname = strrchr(argv[0], '/')) != NULL) {
		cmdname++;
	}
	else {
		cmdname = argv[0];
	}

	if (strcmp(cmdname, "zzz") == 0) {
		sleep = 1;
		all_info = 0;
		goto finish_option;
	}

	for (i = argc - 1; i >= 1; i--) {
		if (argv[i][0] != '-') {
			fprintf(stderr, "%s: Unknown option '%s'.\n", argv[0], argv[i]);
			exit(1);
		}
		for (j = 1; argv[i][j]; j++) {
			switch (argv[i][j]) {
			case 'z':
				sleep = 1;
				all_info = 0;
				break;
			case 'b':
				batt_status = 1;
				all_info = 0;
				break;
			case 'a':
				ac_status = 1;
				all_info = 0;
				break;
			case 'l':
				batt_life = 1;
				all_info = 0;
				break;
			default:
				fprintf(stderr, "%s Unknown option '%s'.\n", argv[0], argv[i]);
				exit(1);
			}
		}
	}
finish_option:
	fd = open(APMDEV, O_RDWR);
	if (fd == -1) {
		fprintf(stderr, "%s: Can't open %s.\n", argv[0], APMDEV);
		return 1;
	}
	if (sleep) {
		apm_suspend(fd);
	}
	else {
		struct apm_info	info;

		apm_getinfo(fd, &info);
		if (all_info) {
			print_all_info(&info);
		}
		if (batt_status) {
			printf("%d\n", info.ai_batt_stat);
		}
		if (batt_life) {
			printf("%d\n", info.ai_batt_life);
		}
		if (ac_status) {
			printf("%d\n", info.ai_acline);
		}
	}
	close(fd);
	return 0;
}