xref: /xsrc/external/mit/xf86-input-synaptics/dist/tools/synclient.c

/*
 * Copyright © 2002-2005,2007 Peter Osterlund
 *
 * Permission to use, copy, modify, distribute, and sell this software
 * and its documentation for any purpose is hereby granted without
 * fee, provided that the above copyright notice appear in all copies
 * and that both that copyright notice and this permission notice
 * appear in supporting documentation, and that the name of Red Hat
 * not be used in advertising or publicity pertaining to distribution
 * of the software without specific, written prior permission.  Red
 * Hat makes no representations about the suitability of this software
 * for any purpose.  It is provided "as is" without express or implied
 * warranty.
 *
 * THE AUTHORS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN
 * NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
 * OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
 * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 * Authors:
 *      Peter Osterlund (petero2@telia.com)
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/time.h>
#include <unistd.h>
#include <string.h>
#include <stddef.h>
#include <math.h>

#include <X11/Xdefs.h>
#include <X11/Xatom.h>
#include <X11/extensions/XI.h>
#include <X11/extensions/XInput.h>
#include "synaptics.h"
#include "synaptics-properties.h"
#include <xserver-properties.h>

#ifndef XATOM_FLOAT
#define XATOM_FLOAT "FLOAT"
#endif

union flong { /* Xlibs 64-bit property handling madness */
    long l;
    float f;
};


enum ParaType {
    PT_INT,
    PT_BOOL,
    PT_DOUBLE
};

struct Parameter {
    char *name;				    /* Name of parameter */
    enum ParaType type;			    /* Type of parameter */
    double min_val;			    /* Minimum allowed value */
    double max_val;			    /* Maximum allowed value */
    char *prop_name;			    /* Property name */
    int prop_format;			    /* Property format (0 for floats) */
    int prop_offset;			    /* Offset inside property */
};

static struct Parameter params[] = {
    {"LeftEdge",              PT_INT,    0, 10000, SYNAPTICS_PROP_EDGES,	32,	0},
    {"RightEdge",             PT_INT,    0, 10000, SYNAPTICS_PROP_EDGES,	32,	1},
    {"TopEdge",               PT_INT,    0, 10000, SYNAPTICS_PROP_EDGES,	32,	2},
    {"BottomEdge",            PT_INT,    0, 10000, SYNAPTICS_PROP_EDGES,	32,	3},
    {"FingerLow",             PT_INT,    0, 255,   SYNAPTICS_PROP_FINGER,	32,	0},
    {"FingerHigh",            PT_INT,    0, 255,   SYNAPTICS_PROP_FINGER,	32,	1},
    {"FingerPress",           PT_INT,    0, 256,   SYNAPTICS_PROP_FINGER,	32,	2},
    {"MaxTapTime",            PT_INT,    0, 1000,  SYNAPTICS_PROP_TAP_TIME,	32,	0},
    {"MaxTapMove",            PT_INT,    0, 2000,  SYNAPTICS_PROP_TAP_MOVE,	32,	0},
    {"MaxDoubleTapTime",      PT_INT,    0, 1000,  SYNAPTICS_PROP_TAP_DURATIONS,32,	1},
    {"SingleTapTimeout",      PT_INT,    0, 1000,  SYNAPTICS_PROP_TAP_DURATIONS,32,	0},
    {"ClickTime",             PT_INT,    0, 1000,  SYNAPTICS_PROP_TAP_DURATIONS,32,	2},
    {"FastTaps",              PT_BOOL,   0, 1,     SYNAPTICS_PROP_TAP_FAST,	8,	0},
    {"EmulateMidButtonTime",  PT_INT,    0, 1000,  SYNAPTICS_PROP_MIDDLE_TIMEOUT,32,	0},
    {"EmulateTwoFingerMinZ",  PT_INT,    0, 1000,  SYNAPTICS_PROP_TWOFINGER_PRESSURE,	32,	0},
    {"EmulateTwoFingerMinW",  PT_INT,    0, 15,    SYNAPTICS_PROP_TWOFINGER_WIDTH,	32,	0},
    {"VertScrollDelta",       PT_INT,    0, 1000,  SYNAPTICS_PROP_SCROLL_DISTANCE,	32,	0},
    {"HorizScrollDelta",      PT_INT,    0, 1000,  SYNAPTICS_PROP_SCROLL_DISTANCE,	32,	1},
    {"VertEdgeScroll",        PT_BOOL,   0, 1,     SYNAPTICS_PROP_SCROLL_EDGE,	8,	0},
    {"HorizEdgeScroll",       PT_BOOL,   0, 1,     SYNAPTICS_PROP_SCROLL_EDGE,	8,	1},
    {"CornerCoasting",        PT_BOOL,   0, 1,     SYNAPTICS_PROP_SCROLL_EDGE,	8,	2},
    {"VertTwoFingerScroll",   PT_BOOL,   0, 1,     SYNAPTICS_PROP_SCROLL_TWOFINGER,	8,	0},
    {"HorizTwoFingerScroll",  PT_BOOL,   0, 1,     SYNAPTICS_PROP_SCROLL_TWOFINGER,	8,	1},
    {"MinSpeed",              PT_DOUBLE, 0, 255.0,   SYNAPTICS_PROP_SPEED,	0, /*float */	0},
    {"MaxSpeed",              PT_DOUBLE, 0, 255.0,   SYNAPTICS_PROP_SPEED,	0, /*float */	1},
    {"AccelFactor",           PT_DOUBLE, 0, 1.0,   SYNAPTICS_PROP_SPEED,	0, /*float */	2},
    {"TrackstickSpeed",       PT_DOUBLE, 0, 200.0, SYNAPTICS_PROP_SPEED,	0, /*float */ 3},
    {"EdgeMotionMinZ",        PT_INT,    1, 255,   SYNAPTICS_PROP_EDGEMOTION_PRESSURE,  32,	0},
    {"EdgeMotionMaxZ",        PT_INT,    1, 255,   SYNAPTICS_PROP_EDGEMOTION_PRESSURE,  32,	1},
    {"EdgeMotionMinSpeed",    PT_INT,    0, 1000,  SYNAPTICS_PROP_EDGEMOTION_SPEED,     32,	0},
    {"EdgeMotionMaxSpeed",    PT_INT,    0, 1000,  SYNAPTICS_PROP_EDGEMOTION_SPEED,     32,	1},
    {"EdgeMotionUseAlways",   PT_BOOL,   0, 1,     SYNAPTICS_PROP_EDGEMOTION,   8,	0},
    {"UpDownScrolling",       PT_BOOL,   0, 1,     SYNAPTICS_PROP_BUTTONSCROLLING,  8,	0},
    {"LeftRightScrolling",    PT_BOOL,   0, 1,     SYNAPTICS_PROP_BUTTONSCROLLING,  8,	1},
    {"UpDownScrollRepeat",    PT_BOOL,   0, 1,     SYNAPTICS_PROP_BUTTONSCROLLING_REPEAT,   8,	0},
    {"LeftRightScrollRepeat", PT_BOOL,   0, 1,     SYNAPTICS_PROP_BUTTONSCROLLING_REPEAT,   8,	1},
    {"ScrollButtonRepeat",    PT_INT,    SBR_MIN , SBR_MAX, SYNAPTICS_PROP_BUTTONSCROLLING_TIME, 32,	0},
    {"TouchpadOff",           PT_INT,    0, 2,     SYNAPTICS_PROP_OFF,		8,	0},
    {"LockedDrags",           PT_BOOL,   0, 1,     SYNAPTICS_PROP_LOCKED_DRAGS,	8,	0},
    {"LockedDragTimeout",     PT_INT,    0, 30000, SYNAPTICS_PROP_LOCKED_DRAGS_TIMEOUT,	32,	0},
    {"RTCornerButton",        PT_INT,    0, SYN_MAX_BUTTONS, SYNAPTICS_PROP_TAP_ACTION,	8,	0},
    {"RBCornerButton",        PT_INT,    0, SYN_MAX_BUTTONS, SYNAPTICS_PROP_TAP_ACTION,	8,	1},
    {"LTCornerButton",        PT_INT,    0, SYN_MAX_BUTTONS, SYNAPTICS_PROP_TAP_ACTION,	8,	2},
    {"LBCornerButton",        PT_INT,    0, SYN_MAX_BUTTONS, SYNAPTICS_PROP_TAP_ACTION,	8,	3},
    {"TapButton1",            PT_INT,    0, SYN_MAX_BUTTONS, SYNAPTICS_PROP_TAP_ACTION,	8,	4},
    {"TapButton2",            PT_INT,    0, SYN_MAX_BUTTONS, SYNAPTICS_PROP_TAP_ACTION,	8,	5},
    {"TapButton3",            PT_INT,    0, SYN_MAX_BUTTONS, SYNAPTICS_PROP_TAP_ACTION,	8,	6},
    {"ClickFinger1",          PT_INT,    0, SYN_MAX_BUTTONS, SYNAPTICS_PROP_CLICK_ACTION,	8,	0},
    {"ClickFinger2",          PT_INT,    0, SYN_MAX_BUTTONS, SYNAPTICS_PROP_CLICK_ACTION,	8,	1},
    {"ClickFinger3",          PT_INT,    0, SYN_MAX_BUTTONS, SYNAPTICS_PROP_CLICK_ACTION,	8,	2},
    {"CircularScrolling",     PT_BOOL,   0, 1,     SYNAPTICS_PROP_CIRCULAR_SCROLLING,	8,	0},
    {"CircScrollDelta",       PT_DOUBLE, .01, 3,   SYNAPTICS_PROP_CIRCULAR_SCROLLING_DIST,	0 /* float */,	0},
    {"CircScrollTrigger",     PT_INT,    0, 8,     SYNAPTICS_PROP_CIRCULAR_SCROLLING_TRIGGER,	8,	0},
    {"CircularPad",           PT_BOOL,   0, 1,     SYNAPTICS_PROP_CIRCULAR_PAD,	8,	0},
    {"PalmDetect",            PT_BOOL,   0, 1,     SYNAPTICS_PROP_PALM_DETECT,	8,	0},
    {"PalmMinWidth",          PT_INT,    0, 15,    SYNAPTICS_PROP_PALM_DIMENSIONS,	32,	0},
    {"PalmMinZ",              PT_INT,    0, 255,   SYNAPTICS_PROP_PALM_DIMENSIONS,	32,	1},
    {"CoastingSpeed",         PT_DOUBLE, 0, 20,    SYNAPTICS_PROP_COASTING_SPEED,	0 /* float*/,	0},
    {"CoastingFriction",      PT_DOUBLE, 0, 255,   SYNAPTICS_PROP_COASTING_SPEED,	0 /* float*/,	1},
    {"PressureMotionMinZ",    PT_INT,    1, 255,   SYNAPTICS_PROP_PRESSURE_MOTION,	32,	0},
    {"PressureMotionMaxZ",    PT_INT,    1, 255,   SYNAPTICS_PROP_PRESSURE_MOTION,	32,	1},
    {"PressureMotionMinFactor", PT_DOUBLE, 0, 10.0,SYNAPTICS_PROP_PRESSURE_MOTION_FACTOR,	0 /*float*/,	0},
    {"PressureMotionMaxFactor", PT_DOUBLE, 0, 10.0,SYNAPTICS_PROP_PRESSURE_MOTION_FACTOR,	0 /*float*/,	1},
    {"GrabEventDevice",       PT_BOOL,   0, 1,     SYNAPTICS_PROP_GRAB,	8,	0},
    {"TapAndDragGesture",     PT_BOOL,   0, 1,     SYNAPTICS_PROP_GESTURES,	8,	0},
    {"AreaLeftEdge",          PT_INT,    0, 10000, SYNAPTICS_PROP_AREA,	32,	0},
    {"AreaRightEdge",         PT_INT,    0, 10000, SYNAPTICS_PROP_AREA,	32,	1},
    {"AreaTopEdge",           PT_INT,    0, 10000, SYNAPTICS_PROP_AREA,	32,	2},
    {"AreaBottomEdge",        PT_INT,    0, 10000, SYNAPTICS_PROP_AREA,	32,	3},
    { NULL, 0, 0, 0, 0 }
};

static double
parse_cmd(char* cmd, struct Parameter** par)
{
    char *eqp = index(cmd, '=');
    *par = NULL;

    if (eqp) {
	int j;
	int found = 0;
	*eqp = 0;
	for (j = 0; params[j].name; j++) {
	    if (strcasecmp(cmd, params[j].name) == 0) {
		found = 1;
		break;
	    }
	}
	if (found) {
	    double val = atof(&eqp[1]);
	    *par = &params[j];

	    if (val < (*par)->min_val)
		val = (*par)->min_val;
	    if (val > (*par)->max_val)
		val = (*par)->max_val;

	    return val;
	} else {
	    printf("Unknown parameter %s\n", cmd);
	}
    } else {
	printf("Invalid command: %s\n", cmd);
    }

    return 0;
}

static int
is_equal(SynapticsSHM *s1, SynapticsSHM *s2)
{
    int i;

    if ((s1->x           != s2->x) ||
	(s1->y           != s2->y) ||
	(s1->z           != s2->z) ||
	(s1->numFingers  != s2->numFingers) ||
	(s1->fingerWidth != s2->fingerWidth) ||
	(s1->left        != s2->left) ||
	(s1->right       != s2->right) ||
	(s1->up          != s2->up) ||
	(s1->down        != s2->down) ||
	(s1->middle      != s2->middle))
	return 0;

    for (i = 0; i < 8; i++)
	if (s1->multi[i] != s2->multi[i])
	    return 0;

    return 1;
}

static double
get_time(void)
{
    struct timeval tv;
    gettimeofday(&tv, NULL);
    return tv.tv_sec + tv.tv_usec / 1000000.0;
}

static void
shm_monitor(SynapticsSHM *synshm, int delay)
{
    int header = 0;
    SynapticsSHM old;
    double t0 = get_time();

    memset(&old, 0, sizeof(SynapticsSHM));
    old.x = -1;				    /* Force first equality test to fail */

    while (1) {
	SynapticsSHM cur = *synshm;
	if (!is_equal(&old, &cur)) {
	    if (!header) {
		printf("%8s  %4s %4s %3s %s %2s %2s %s %s %s %s  %8s  "
		       "%2s %2s %2s %3s %3s\n",
		       "time", "x", "y", "z", "f", "w", "l", "r", "u", "d", "m",
		       "multi", "gl", "gm", "gr", "gdx", "gdy");
		header = 20;
	    }
	    header--;
	    printf("%8.3f  %4d %4d %3d %d %2d %2d %d %d %d %d  %d%d%d%d%d%d%d%d\n",
		   get_time() - t0,
		   cur.x, cur.y, cur.z, cur.numFingers, cur.fingerWidth,
		   cur.left, cur.right, cur.up, cur.down, cur.middle,
		   cur.multi[0], cur.multi[1], cur.multi[2], cur.multi[3],
		   cur.multi[4], cur.multi[5], cur.multi[6], cur.multi[7]);
	    fflush(stdout);
	    old = cur;
	}
	usleep(delay * 1000);
    }
}

/** Init and return SHM area or NULL on error */
static  SynapticsSHM*
shm_init()
{
    SynapticsSHM *synshm = NULL;
    int shmid = 0;

    if ((shmid = shmget(SHM_SYNAPTICS, sizeof(SynapticsSHM), 0)) == -1) {
	if ((shmid = shmget(SHM_SYNAPTICS, 0, 0)) == -1)
	    fprintf(stderr, "Can't access shared memory area. SHMConfig disabled?\n");
	else
	    fprintf(stderr, "Incorrect size of shared memory area. Incompatible driver version?\n");
    } else if ((synshm = (SynapticsSHM*) shmat(shmid, NULL, SHM_RDONLY)) == NULL)
	perror("shmat");

    return synshm;
}

static void
shm_process_commands(int do_monitor, int delay)
{
    SynapticsSHM *synshm = NULL;

    synshm = shm_init();
    if (!synshm)
        return;

    if (do_monitor)
        shm_monitor(synshm, delay);
}

/** Init display connection or NULL on error */
static Display*
dp_init()
{
    Display *dpy		= NULL;
    XExtensionVersion *v	= NULL;
    Atom touchpad_type		= 0;
    Atom synaptics_property	= 0;
    int error			= 0;

    dpy = XOpenDisplay(NULL);
    if (!dpy) {
	fprintf(stderr, "Failed to connect to X Server.\n");
	error = 1;
	goto unwind;
    }

    v = XGetExtensionVersion(dpy, INAME);
    if (!v->present ||
	(v->major_version * 1000 + v->minor_version) < (XI_Add_DeviceProperties_Major * 1000
	    + XI_Add_DeviceProperties_Minor)) {
	fprintf(stderr, "X server supports X Input %d.%d. I need %d.%d.\n",
		v->major_version, v->minor_version,
		XI_Add_DeviceProperties_Major,
		XI_Add_DeviceProperties_Minor);
	error = 1;
	goto unwind;
    }

    /* We know synaptics sets XI_TOUCHPAD for all the devices. */
    touchpad_type = XInternAtom(dpy, XI_TOUCHPAD, True);
    if (!touchpad_type) {
	fprintf(stderr, "XI_TOUCHPAD not initialised.\n");
	error = 1;
	goto unwind;
    }

    synaptics_property = XInternAtom(dpy, SYNAPTICS_PROP_EDGES, True);
    if (!synaptics_property) {
	fprintf(stderr, "Couldn't find synaptics properties. No synaptics "
		"driver loaded?\n");
	error = 1;
	goto unwind;
    }

unwind:
    XFree(v);
    if (error && dpy)
    {
	XCloseDisplay(dpy);
	dpy = NULL;
    }
    return dpy;
}

static XDevice *
dp_get_device(Display *dpy)
{
    XDevice* dev		= NULL;
    XDeviceInfo *info		= NULL;
    int ndevices		= 0;
    Atom touchpad_type		= 0;
    Atom synaptics_property	= 0;
    Atom *properties		= NULL;
    int nprops			= 0;
    int error			= 0;

    touchpad_type = XInternAtom(dpy, XI_TOUCHPAD, True);
    synaptics_property = XInternAtom(dpy, SYNAPTICS_PROP_EDGES, True);
    info = XListInputDevices(dpy, &ndevices);

    while(ndevices--) {
	if (info[ndevices].type == touchpad_type) {
	    dev = XOpenDevice(dpy, info[ndevices].id);
	    if (!dev) {
		fprintf(stderr, "Failed to open device '%s'.\n",
			info[ndevices].name);
		error = 1;
		goto unwind;
	    }

	    properties = XListDeviceProperties(dpy, dev, &nprops);
	    if (!properties || !nprops)
	    {
		fprintf(stderr, "No properties on device '%s'.\n",
			info[ndevices].name);
		error = 1;
		goto unwind;
	    }

	    while(nprops--)
	    {
		if (properties[nprops] == synaptics_property)
		    break;
	    }
	    if (!nprops)
	    {
		fprintf(stderr, "No synaptics properties on device '%s'.\n",
			info[ndevices].name);
		error = 1;
		goto unwind;
	    }

	    break; /* Yay, device is suitable */
	}
    }

unwind:
    XFree(properties);
    XFreeDeviceList(info);
    if (!dev)
        fprintf(stderr, "Unable to find a synaptics device.\n");
    else if (error && dev)
    {
	XCloseDevice(dpy, dev);
	dev = NULL;
    }
    return dev;
}

static void
dp_set_variables(Display *dpy, XDevice* dev, int argc, char *argv[], int first_cmd)
{
    int i;
    double val;
    struct Parameter *par;
    Atom prop, type, float_type;
    int format;
    unsigned char* data;
    unsigned long nitems, bytes_after;

    union flong *f;
    long *n;
    char *b;

    float_type = XInternAtom(dpy, XATOM_FLOAT, True);
    if (!float_type)
	fprintf(stderr, "Float properties not available.\n");

    for (i = first_cmd; i < argc; i++) {
	val = parse_cmd(argv[i], &par);
	if (!par)
	    continue;

	prop = XInternAtom(dpy, par->prop_name, True);
	if (!prop)
	{
	    fprintf(stderr, "Property for '%s' not available. Skipping.\n",
		    par->name);
	    continue;

	}

	XGetDeviceProperty(dpy, dev, prop, 0, 1000, False, AnyPropertyType,
				&type, &format, &nitems, &bytes_after, &data);

	switch(par->prop_format)
	{
	    case 8:
		if (format != par->prop_format || type != XA_INTEGER) {
		    fprintf(stderr, "   %-23s = format mismatch (%d)\n",
			    par->name, format);
		    break;
		}
		b = (char*)data;
		b[par->prop_offset] = rint(val);
		break;
	    case 32:
		if (format != par->prop_format || type != XA_INTEGER) {
		    fprintf(stderr, "   %-23s = format mismatch (%d)\n",
			    par->name, format);
		    break;
		}
		n = (long*)data;
		n[par->prop_offset] = rint(val);
		break;
	    case 0: /* float */
		if (!float_type)
		    continue;
		if (format != 32 || type != float_type) {
		    fprintf(stderr, "   %-23s = format mismatch (%d)\n",
			    par->name, format);
		    break;
		}
		f = (union flong*)data;
		f[par->prop_offset].f = val;
		break;
	}

	XChangeDeviceProperty(dpy, dev, prop, type, format,
				PropModeReplace, data, nitems);
	XFlush(dpy);
    }
}

/* FIXME: horribly inefficient. */
static void
dp_show_settings(Display *dpy, XDevice *dev)
{
    int j;
    Atom a, type, float_type;
    int format;
    unsigned long nitems, bytes_after;
    unsigned char* data;
    int len;

    union flong *f;
    long *i;
    char *b;

    float_type = XInternAtom(dpy, XATOM_FLOAT, True);
    if (!float_type)
	fprintf(stderr, "Float properties not available.\n");

    printf("Parameter settings:\n");
    for (j = 0; params[j].name; j++) {
	struct Parameter *par = &params[j];
	a = XInternAtom(dpy, par->prop_name, True);
	if (!a)
	    continue;

	len = 1 + ((par->prop_offset * (par->prop_format ? par->prop_format : 32)/8))/4;

	XGetDeviceProperty(dpy, dev, a, 0, len, False,
				AnyPropertyType, &type, &format,
				&nitems, &bytes_after, &data);

	switch(par->prop_format) {
	    case 8:
		if (format != par->prop_format || type != XA_INTEGER) {
		    fprintf(stderr, "   %-23s = format mismatch (%d)\n",
			    par->name, format);
		    break;
		}

		b = (char*)data;
		printf("    %-23s = %d\n", par->name, b[par->prop_offset]);
		break;
	    case 32:
		if (format != par->prop_format || type != XA_INTEGER) {
		    fprintf(stderr, "   %-23s = format mismatch (%d)\n",
			    par->name, format);
		    break;
		}

		i = (long*)data;
		printf("    %-23s = %ld\n", par->name, i[par->prop_offset]);
		break;
	    case 0: /* Float */
		if (!float_type)
		    continue;
		if (format != 32 || type != float_type) {
		    fprintf(stderr, "   %-23s = format mismatch (%d)\n",
			    par->name, format);
		    break;
		}

		f = (union flong*)data;
		printf("    %-23s = %g\n", par->name, f[par->prop_offset].f);
		break;
	}

	XFree(data);
    }
}

static void
usage(void)
{
    fprintf(stderr, "Usage: synclient [-s] [-m interval] [-h] [-l] [-V] [-?] [var1=value1 [var2=value2] ...]\n");
    fprintf(stderr, "  -m monitor changes to the touchpad state (implies -s)\n"
	    "     interval specifies how often (in ms) to poll the touchpad state\n");
    fprintf(stderr, "  -l List current user settings\n");
    fprintf(stderr, "  -V Print synclient version string and exit\n");
    fprintf(stderr, "  -? Show this help message\n");
    fprintf(stderr, "  var=value  Set user parameter 'var' to 'value'.\n");
    exit(1);
}

int
main(int argc, char *argv[])
{
    int c;
    int delay = -1;
    int do_monitor = 0;
    int dump_settings = 0;
    int first_cmd;

    Display *dpy;
    XDevice *dev;

    if (argc == 1)
        dump_settings = 1;

    /* Parse command line parameters */
    while ((c = getopt(argc, argv, "sm:hlV")) != -1) {
	switch (c) {
	case 'm':
	    do_monitor = 1;
	    if ((delay = atoi(optarg)) < 0)
		usage();
	    break;
	case 'l':
	    dump_settings = 1;
	    break;
	case 'V':
	    printf("%s\n", VERSION);
	    exit(0);
	default:
	    usage();
	}
    }

    first_cmd = optind;
    if (!do_monitor && !dump_settings && first_cmd == argc)
	usage();

    /* Connect to the shared memory area */
    if (do_monitor)
        shm_process_commands(do_monitor, delay);

    dpy = dp_init();
    if (!dpy || !(dev = dp_get_device(dpy)))
        return 1;

    dp_set_variables(dpy, dev, argc, argv, first_cmd);
    if (dump_settings)
        dp_show_settings(dpy, dev);

    XCloseDevice(dpy, dev);
    XCloseDisplay(dpy);

    return 0;
}