/*	$OpenBSD: apm.c,v 1.16 2006/01/19 19:17:10 sturm Exp $	*/

/*
 *  Copyright (c) 1996 John T. Kohl
 *  All rights reserved.
 * 
 *  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.
 *  3. The name of the author may not be used to endorse or promote products
 *     derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `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 AUTHOR 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 <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <err.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/ioctl.h>
#include <machine/apmvar.h>
#include "pathnames.h"
#include "apm-proto.h"

#define FALSE 0
#define TRUE 1

extern char *__progname;

void usage(void);
void zzusage(void);
int do_zzz(int, enum apm_action action);
int open_socket(const char *pn);
int send_command(int fd, struct apm_command *cmd, struct apm_reply *reply);

void
usage(void)
{
	fprintf(stderr,"usage: %s [-AabCHLlmPSsvz] [-f sockname]\n",
	    __progname);
	exit(1);
}

void
zzusage(void)
{
	fprintf(stderr,"usage: %s [-Sz] [-f sockname]\n",
	    __progname);
	exit(1);
}

int
send_command(int fd, struct apm_command *cmd, struct apm_reply *reply)
{
	/* send a command to the apm daemon */
	cmd->vno = APMD_VNO;

	if (send(fd, cmd, sizeof(*cmd), 0) == sizeof(*cmd)) {
		if (recv(fd, reply, sizeof(*reply), 0) != sizeof(*reply)) {
			warn("invalid reply from APM daemon");
			return (1);
		}
	} else {
		warn("invalid send to APM daemon");
		return (1);
	}
	return (0);
}

int
do_zzz(int fd, enum apm_action action)
{
	struct apm_command command;
	struct apm_reply reply;

	switch (action) {
	case NONE:
	case SUSPEND:
		command.action = SUSPEND;
		break;
	case STANDBY:
		command.action = STANDBY;
		break;
	default:
		zzusage();
	}

	printf("Suspending system...\n");
	exit(send_command(fd, &command, &reply));
}

int
open_socket(const char *sockname)
{
	int sock, errr;
	struct sockaddr_un s_un;

	sock = socket(AF_UNIX, SOCK_STREAM, 0);
	if (sock == -1)
		err(1, "cannot create local socket");

	s_un.sun_family = AF_UNIX;
	strncpy(s_un.sun_path, sockname, sizeof(s_un.sun_path));
	s_un.sun_len = SUN_LEN(&s_un);
	if (connect(sock, (struct sockaddr *)&s_un, s_un.sun_len) == -1) {
		errr = errno;
		close(sock);
		errno = errr;
		err(1, "cannot open connection to APM daemon");
	}
	return (sock);
}

int
main(int argc, char *argv[])
{
	const char *sockname = _PATH_APM_SOCKET;
	int dostatus = FALSE;
	int doac = FALSE;
	int dopct = FALSE;
	int dobstate = FALSE;
	int domin = FALSE;
	int doperf = FALSE;
	int verbose = FALSE;
	int ch, fd, rval;
	enum apm_action action = NONE;
	struct apm_command command;
	struct apm_reply reply;

	while ((ch = getopt(argc, argv, "ACHLlmbvaPsSzf:")) != -1) {
		switch (ch) {
		case 'v':
			verbose = TRUE;
			break;
		case 'f':
			sockname = optarg;
			break;
		case 'z':
			if (action != NONE)
				usage();
			action = SUSPEND;
			break;
		case 'S':
			if (action != NONE)
				usage();
			action = STANDBY;
			break;
		case 'A':
			if (action != NONE)
				usage();
			action = SETPERF_AUTO;
			break;
		case 'C':
			if (action != NONE)
				usage();
			action = SETPERF_COOL;
			break;
		case 'H':
			if (action != NONE)
				usage();
			action = SETPERF_HIGH;
			break;
		case 'L':
			if (action != NONE)
				usage();
			action = SETPERF_LOW;
			break;
		case 's':
			if (action != NONE && action != GETSTATUS)
				usage();
			dostatus = TRUE;
			action = GETSTATUS;
			break;
		case 'b':
			if (action != NONE && action != GETSTATUS)
				usage();
			dobstate = TRUE;
			action = GETSTATUS;
			break;
		case 'l':
			if (action != NONE && action != GETSTATUS)
				usage();
			dopct = TRUE;
			action = GETSTATUS;
			break;
		case 'm':
			if (action != NONE && action != GETSTATUS)
				usage();
			domin = TRUE;
			action = GETSTATUS;
			break;
		case 'a':
			if (action != NONE && action != GETSTATUS)
				usage();
			doac = TRUE;
			action = GETSTATUS;
			break;
		case 'P':
			if (action != NONE && action != GETSTATUS)
				usage();
			doperf = TRUE;
			action = GETSTATUS;
			break;
		default:
			usage();
		}
	}

	fd = open_socket(sockname);

	if (!strcmp(__progname, "zzz"))
		return (do_zzz(fd, action));

	switch (action) {
	case NONE:
		action = GETSTATUS;
		verbose = doac = dopct = dobstate = dostatus = domin = TRUE;
		doperf = TRUE;
		/* FALLTHROUGH */
	case GETSTATUS:
		if (fd == -1) {
			/* open the device directly and get status */
			fd = open(_PATH_APM_NORMAL, O_RDONLY);
			if (ioctl(fd, APM_IOC_GETPOWER,
			    &reply.batterystate) == 0)
				goto printval;
		}
		/* FALLTHROUGH */
	case SUSPEND:
	case STANDBY:
	case SETPERF_LOW:
	case SETPERF_HIGH:
	case SETPERF_AUTO:
	case SETPERF_COOL:
		command.action = action;
		break;
	default:
		usage();
	}

	if ((rval = send_command(fd, &command, &reply)) != 0)
		errx(rval, "cannot get reply from APM daemon");

	switch (action) {
	case GETSTATUS:
	printval:
		if (!verbose) {
			if (dobstate)
				printf("%d\n",
				    reply.batterystate.battery_state);
			if (dopct)
				printf("%d\n",
				    reply.batterystate.battery_life);
			if (domin) {
				if (reply.batterystate.minutes_left ==
				    (u_int)-1)
					printf("unknown\n");
				else
					printf("%d\n",
					    reply.batterystate.minutes_left);
			}
			if (doac)
				printf("%d\n",
				    reply.batterystate.ac_state);
			if (dostatus)
				printf("1\n");
			if (doperf)
				printf("%d\n", reply.perfstate);
			break;
		}
		if (dobstate)
			printf("Battery state: %s\n",
			    battstate(reply.batterystate.battery_state));
		if (dopct)
			printf("Battery remaining: %d percent\n",
			    reply.batterystate.battery_life);
		if (domin) {
#ifdef __powerpc__
			if (reply.batterystate.battery_state ==
			    APM_BATT_CHARGING)
				printf("Remaining battery recharge "
				    "time estimate: %d minutes\n",
				    reply.batterystate.minutes_left);
			else if (reply.batterystate.minutes_left == 0 &&
			    reply.batterystate.battery_life > 10)
				printf("Battery life estimate: "
				    "not available\n");
			else
#endif
			{
				printf("Battery life estimate: ");
				if (reply.batterystate.minutes_left ==
				    (u_int)-1)
					printf("unknown\n");
				else
					printf("%d minutes\n",
					    reply.batterystate.minutes_left);
			}
		}
		if (doac)
			printf("A/C adapter state: %s\n",
			    ac_state(reply.batterystate.ac_state));
		if (doperf)
			printf("Performance state: %s (%d MHz)\n",
			    perf_state(reply.perfstate), reply.cpuspeed);
		if (dostatus)
			printf("Power management enabled\n");
		break;
	default:
		break;
	}

	switch (reply.newstate) {
	case SUSPEND:
		printf("System will enter suspend mode momentarily.\n");
		break;
	case STANDBY:
		printf("System will enter standby mode momentarily.\n");
		break;
	default:
		break;
	}
	return (0);
}