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moused.c
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moused.c
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/**
** SPDX-License-Identifier: BSD-4-Clause
**
** Copyright (c) 1995 Michael Smith, All rights reserved.
** Copyright (c) 2008 Jean-Sebastien Pedron <dumbbell@FreeBSD.org>
** Copyright (c) 2021,2024 Vladimir Kondratyev <wulf@FreeBSD.org>
**
** 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 as
** the first lines of this file unmodified.
** 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. All advertising materials mentioning features or use of this software
** must display the following acknowledgment:
** This product includes software developed by Michael Smith.
** 4. 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 Michael Smith ``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 Michael Smith 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.
**
**/
/**
** MOUSED.C
**
** Mouse daemon : listens to a evdev device node for mouse data stream,
** interprets data and passes ioctls off to the console driver.
**
**/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/bitstring.h>
#include <sys/consio.h>
#include <sys/mouse.h>
#include <sys/time.h>
#include <dev/evdev/input.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <libutil.h>
#include <math.h>
#include <poll.h>
#include <setjmp.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>
#include "util.h"
#include "quirks.h"
/*
* bitstr_t implementation must be identical to one found in EVIOCG*
* libevdev ioctls. Our bitstring(3) API is compatible since r299090.
*/
_Static_assert(sizeof(bitstr_t) == sizeof(unsigned long),
"bitstr_t size mismatch");
#define MAX_CLICKTHRESHOLD 2000 /* 2 seconds */
#define MAX_BUTTON2TIMEOUT 2000 /* 2 seconds */
#define DFLT_CLICKTHRESHOLD 500 /* 0.5 second */
#define DFLT_BUTTON2TIMEOUT 100 /* 0.1 second */
#define DFLT_SCROLLTHRESHOLD 3 /* 3 pixels */
#define DFLT_SCROLLSPEED 2 /* 2 pixels */
#define DFLT_MOUSE_RESOLUTION 8 /* dpmm, == 200dpi */
#define DFLT_TPAD_RESOLUTION 40 /* dpmm, typical X res for Synaptics */
#define DFLT_LINEHEIGHT 10 /* pixels per line */
/* Abort 3-button emulation delay after this many movement events. */
#define BUTTON2_MAXMOVE 3
#define MOUSE_XAXIS (-1)
#define MOUSE_YAXIS (-2)
#define ChordMiddle 0x0001
#define Emulate3Button 0x0002
#define VirtualScroll 0x0020
#define HVirtualScroll 0x0040
#define ExponentialAcc 0x0080
#define MAX_FINGERS 10
#define ID_NONE 0
#define ID_PORT 1
/* Was ID_IF 2 */
#define ID_TYPE 4
#define ID_MODEL 8
#define ID_ALL (ID_PORT | ID_TYPE | ID_MODEL)
/* Operations on timespecs */
#define tsclr(tvp) ((tvp)->tv_sec = (tvp)->tv_nsec = 0)
#define tscmp(tvp, uvp, cmp) \
(((tvp)->tv_sec == (uvp)->tv_sec) ? \
((tvp)->tv_nsec cmp (uvp)->tv_nsec) : \
((tvp)->tv_sec cmp (uvp)->tv_sec))
#define tssub(tvp, uvp, vvp) \
do { \
(vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \
(vvp)->tv_nsec = (tvp)->tv_nsec - (uvp)->tv_nsec; \
if ((vvp)->tv_nsec < 0) { \
(vvp)->tv_sec--; \
(vvp)->tv_nsec += 1000000000; \
} \
} while (0)
/* Operations on timevals. */
#define tvclr(tvp) ((tvp)->tv_sec = (tvp)->tv_usec = 0)
#define tvcmp(tvp, uvp, cmp) \
(((tvp)->tv_sec == (uvp)->tv_sec) ? \
((tvp)->tv_usec cmp (uvp)->tv_usec) : \
((tvp)->tv_sec cmp (uvp)->tv_sec))
#define tvadd(tvp, uvp) \
do { \
(tvp)->tv_sec += (uvp)->tv_sec; \
(tvp)->tv_usec += (uvp)->tv_usec; \
if ((tvp)->tv_usec >= 1000000) { \
(tvp)->tv_sec++; \
(tvp)->tv_usec -= 1000000; \
} \
} while (0)
#define debug(...) do { \
if (debug && nodaemon) \
warnx(__VA_ARGS__); \
} while (0)
#define logerr(e, ...) do { \
log_or_warn(LOG_DAEMON | LOG_ERR, errno, __VA_ARGS__); \
exit(e); \
} while (0)
#define logerrx(e, ...) do { \
log_or_warn(LOG_DAEMON | LOG_ERR, 0, __VA_ARGS__); \
exit(e); \
} while (0)
#define logwarn(...) \
log_or_warn(LOG_DAEMON | LOG_WARNING, errno, __VA_ARGS__)
#define logwarnx(...) \
log_or_warn(LOG_DAEMON | LOG_WARNING, 0, __VA_ARGS__)
enum gesture {
GEST_IGNORE,
GEST_ACCUMULATE,
GEST_MOVE,
GEST_VSCROLL,
GEST_HSCROLL,
};
/* structures */
/* global variables */
static int debug = 0;
static bool nodaemon = false;
static bool background = false;
static bool paused = false;
static bool grab = false;
static int identify = ID_NONE;
static const char *pidfile = "/var/run/moused.pid";
static struct pidfh *pfh;
static const char *config_file = CONFSDIR "/moused.conf";
static const char *quirks_path = QUIRKSDIR;
static struct quirks_context *quirks;
static bool opt_drift_terminate = false;
static u_int opt_drift_distance = 4; /* max steps X+Y */
static u_int opt_drift_time = 500; /* ms */
static u_int opt_drift_after = 4000; /* ms */
static double opt_accelx = 1.0;
static double opt_accely = 1.0;
static bool opt_exp_accel = false;
static double opt_expoaccel = 1.0;
static double opt_expoffset = 1.0;
#define SCROLL_NOTSCROLLING 0
#define SCROLL_PREPARE 1
#define SCROLL_SCROLLING 2
static struct scroll {
int state;
int movement;
int hmovement;
} scroll;
/* local variables */
/* types (the table must be ordered by DEVICE_TYPE_XXX in util.h) */
static const char *rnames[] = {
[DEVICE_TYPE_MOUSE] = "mouse",
[DEVICE_TYPE_POINTINGSTICK] = "pointing stick",
[DEVICE_TYPE_TOUCHPAD] = "touchpad",
[DEVICE_TYPE_TOUCHSCREEN] = "touchscreen",
[DEVICE_TYPE_TABLET] = "tablet",
[DEVICE_TYPE_TABLET_PAD] = "tablet pad",
[DEVICE_TYPE_KEYBOARD] = "keyboard",
[DEVICE_TYPE_JOYSTICK] = "joystick",
};
static struct tpcaps {
bool is_clickpad;
bool is_mt;
bool cap_touch;
bool cap_pressure;
bool cap_width;
int min_x;
int max_x;
int min_y;
int max_y;
int res_x; /* dots per mm */
int res_y; /* dots per mm */
} synhw;
static struct tpinfo {
bool two_finger_scroll; /* Enable two finger scrolling */
bool natural_scroll; /* Enable natural scrolling */
bool three_finger_drag; /* Enable dragging with three fingers */
u_int min_pressure; /* Min pressure to start an action */
u_int max_pressure; /* Maximum pressure to detect palm */
u_int max_width; /* Max finger width to detect palm */
int margin_top; /* Top margin */
int margin_right; /* Right margin */
int margin_bottom; /* Bottom margin */
int margin_left; /* Left margin */
u_int tap_timeout; /* */
u_int tap_threshold; /* Minimum pressure to detect a tap */
double tap_max_delta; /* Length of segments above which a tap is ignored */
u_int taphold_timeout; /* Maximum elapsed time between two taps to consider a tap-hold action */
double vscroll_ver_area; /* Area reserved for vertical virtual scrolling */
double vscroll_hor_area; /* Area reserved for horizontal virtual scrolling */
double vscroll_min_delta; /* Minimum movement to consider virtual scrolling */
int softbuttons_y; /* Vertical size of softbuttons area */
int softbutton2_x; /* Horizontal offset of 2-nd softbutton left edge */
int softbutton3_x; /* Horizontal offset of 3-rd softbutton left edge */
} syninfo = {
.two_finger_scroll = true,
.natural_scroll = false,
.three_finger_drag = false,
.min_pressure = 1,
.max_pressure = 130,
.max_width = 16,
.tap_timeout = 180, /* ms */
.tap_threshold = 0,
.tap_max_delta = 1.3, /* mm */
.taphold_timeout = 300, /* ms */
.vscroll_min_delta = 1.25, /* mm */
.vscroll_hor_area = 0.0, /* mm */
.vscroll_ver_area = -15.0, /* mm */
};
static struct gesture_state {
int start_x;
int start_y;
int prev_x;
int prev_y;
int prev_nfingers;
int fingers_nb;
int tap_button;
bool fingerdown;
bool in_taphold;
int in_vscroll;
int zmax; /* maximum pressure value */
struct timeval taptimeout; /* tap timeout for touchpads */
struct timeval startdelay;
int idletimeout;
} gesture = {
.idletimeout = -1,
};
struct finger {
int x;
int y;
int p;
int w;
int id; /* id=0 - no touch, id>1 - touch id */
};
static struct evdev_state {
int buttons;
/* Relative */
int dx;
int dy;
int dz;
int dw;
int acc_dx;
int acc_dy;
/* Absolute single-touch */
int nfingers;
struct finger st;
/* Absolute multi-touch */
int slot;
struct finger mt[MAX_FINGERS];
} ev;
struct drift_xy {
int x;
int y;
};
struct drift {
u_int distance; /* max steps X+Y */
u_int time; /* ms */
struct timespec time_ts;
struct timespec twotime_ts; /* 2*drift_time */
u_int after; /* ms */
struct timespec after_ts;
bool terminate;
struct timespec current_ts;
struct timespec tmp;
struct timespec last_activity;
struct timespec since;
struct drift_xy last; /* steps in last drift_time */
struct drift_xy previous; /* steps in prev. drift_time */
};
static struct rodentparam {
int flags;
struct device dev; /* Device */
struct quirks *quirks; /* Configuration file and quirks */
int zmap[4]; /* MOUSE_{X|Y}AXIS or a button number */
int wmode; /* wheel mode button number */
int mfd; /* mouse file descriptor */
int cfd; /* /dev/consolectl file descriptor */
long clickthreshold; /* double click speed in msec */
long button2timeout; /* 3 button emulation timeout */
double accelx; /* Acceleration in the X axis */
double accely; /* Acceleration in the Y axis */
double accelz; /* Acceleration in the wheel axis */
double expoaccel; /* Exponential acceleration */
double expoffset; /* Movement offset for exponential accel. */
double remainx; /* Remainder on X, Y and wheel axis, ... */
double remainy; /* ... respectively to compensate */
double remainz; /* ... for rounding errors. */
int scrollthreshold; /* Movement distance before virtual scrolling */
int scrollspeed; /* Movement distance to rate of scrolling */
struct drift drift;
} rodent = {
.flags = 0,
.dev.path = NULL,
.dev.type = DEVICE_TYPE_UNKNOWN,
.quirks = NULL,
.zmap = { 0, 0, 0, 0 },
.wmode = 0,
.mfd = -1,
.cfd = -1,
.clickthreshold = DFLT_CLICKTHRESHOLD,
.button2timeout = DFLT_BUTTON2TIMEOUT,
.scrollthreshold = DFLT_SCROLLTHRESHOLD,
.scrollspeed = DFLT_SCROLLSPEED,
};
/* button status */
struct button_state {
int count; /* 0: up, 1: single click, 2: double click,... */
struct timespec ts; /* timestamp on the last button event */
};
static struct button_state bstate[MOUSE_MAXBUTTON]; /* button state */
static struct button_state *mstate[MOUSE_MAXBUTTON];/* mapped button st.*/
static struct button_state zstate[4]; /* Z/W axis state */
/* state machine for 3 button emulation */
#define S0 0 /* start */
#define S1 1 /* button 1 delayed down */
#define S2 2 /* button 3 delayed down */
#define S3 3 /* both buttons down -> button 2 down */
#define S4 4 /* button 1 delayed up */
#define S5 5 /* button 1 down */
#define S6 6 /* button 3 down */
#define S7 7 /* both buttons down */
#define S8 8 /* button 3 delayed up */
#define S9 9 /* button 1 or 3 up after S3 */
#define A(b1, b3) (((b1) ? 2 : 0) | ((b3) ? 1 : 0))
#define A_TIMEOUT 4
#define S_DELAYED(st) (states[st].s[A_TIMEOUT] != (st))
static struct {
int s[A_TIMEOUT + 1];
int buttons;
int mask;
bool timeout;
} states[10] = {
/* S0 */
{ { S0, S2, S1, S3, S0 }, 0, ~(MOUSE_BUTTON1DOWN | MOUSE_BUTTON3DOWN), false },
/* S1 */
{ { S4, S2, S1, S3, S5 }, 0, ~MOUSE_BUTTON1DOWN, false },
/* S2 */
{ { S8, S2, S1, S3, S6 }, 0, ~MOUSE_BUTTON3DOWN, false },
/* S3 */
{ { S0, S9, S9, S3, S3 }, MOUSE_BUTTON2DOWN, ~0, false },
/* S4 */
{ { S0, S2, S1, S3, S0 }, MOUSE_BUTTON1DOWN, ~0, true },
/* S5 */
{ { S0, S2, S5, S7, S5 }, MOUSE_BUTTON1DOWN, ~0, false },
/* S6 */
{ { S0, S6, S1, S7, S6 }, MOUSE_BUTTON3DOWN, ~0, false },
/* S7 */
{ { S0, S6, S5, S7, S7 }, MOUSE_BUTTON1DOWN | MOUSE_BUTTON3DOWN, ~0, false },
/* S8 */
{ { S0, S2, S1, S3, S0 }, MOUSE_BUTTON3DOWN, ~0, true },
/* S9 */
{ { S0, S9, S9, S3, S9 }, 0, ~(MOUSE_BUTTON1DOWN | MOUSE_BUTTON3DOWN), false },
};
static int mouse_button_state;
static struct timespec mouse_button_state_ts;
static int mouse_move_delayed;
static jmp_buf env;
/* function prototypes */
static moused_log_handler log_or_warn_va;
static void linacc(int, int, int, int*, int*, int*);
static void expoacc(int, int, int, int*, int*, int*);
static void moused(void);
static void reset(int sig);
static void pause_mouse(int sig);
static void usage(void);
static void log_or_warn(int log_pri, int errnum, const char *fmt, ...)
__printflike(3, 4);
static enum device_type r_identify(int fd, struct device *dev);
static const char *r_name(int type);
static void r_init(void);
static int r_protocol(struct input_event *b, mousestatus_t *act);
static int r_statetrans(mousestatus_t *a1, mousestatus_t *a2, int trans);
static bool r_installmap(char *arg);
static void r_map(mousestatus_t *act1, mousestatus_t *act2);
static void r_timestamp(mousestatus_t *act);
static bool r_timeout(void);
static void r_click(mousestatus_t *act);
static bool r_drift(struct drift *, mousestatus_t *);
static enum gesture r_gestures(int x0, int y0, int z, int w, int nfingers,
struct timeval *time, mousestatus_t *ms);
int
main(int argc, char *argv[])
{
int c;
int i;
int j;
for (i = 0; i < MOUSE_MAXBUTTON; ++i)
mstate[i] = &bstate[i];
while ((c = getopt(argc, argv, "3A:C:E:HI:L:T:VU:a:cdfghi:m:p:q:w:z:")) != -1)
switch(c) {
case '3':
rodent.flags |= Emulate3Button;
break;
case 'E':
rodent.button2timeout = atoi(optarg);
if ((rodent.button2timeout < 0) ||
(rodent.button2timeout > MAX_BUTTON2TIMEOUT)) {
warnx("invalid argument `%s'", optarg);
usage();
}
break;
case 'a':
i = sscanf(optarg, "%lf,%lf", &opt_accelx, &opt_accely);
if (i == 0) {
warnx("invalid linear acceleration argument "
"'%s'", optarg);
usage();
}
if (i == 1)
opt_accely = opt_accelx;
break;
case 'A':
opt_exp_accel = true;
i = sscanf(optarg, "%lf,%lf", &opt_expoaccel,
&opt_expoffset);
if (i == 0) {
warnx("invalid exponential acceleration "
"argument '%s'", optarg);
usage();
}
if (i == 1)
opt_expoffset = 1.0;
break;
case 'c':
rodent.flags |= ChordMiddle;
break;
case 'd':
++debug;
break;
case 'f':
nodaemon = true;
break;
case 'g':
grab = true;
break;
case 'i':
if (strcmp(optarg, "all") == 0)
identify = ID_ALL;
else if (strcmp(optarg, "port") == 0)
identify = ID_PORT;
else if (strcmp(optarg, "type") == 0)
identify = ID_TYPE;
else if (strcmp(optarg, "model") == 0)
identify = ID_MODEL;
else {
warnx("invalid argument `%s'", optarg);
usage();
}
nodaemon = true;
break;
case 'm':
if (!r_installmap(optarg)) {
warnx("invalid argument `%s'", optarg);
usage();
}
break;
case 'p':
rodent.dev.path = optarg;
break;
case 'w':
i = atoi(optarg);
if ((i <= 0) || (i > MOUSE_MAXBUTTON)) {
warnx("invalid argument `%s'", optarg);
usage();
}
rodent.wmode = 1 << (i - 1);
break;
case 'z':
if (strcmp(optarg, "x") == 0)
rodent.zmap[0] = MOUSE_XAXIS;
else if (strcmp(optarg, "y") == 0)
rodent.zmap[0] = MOUSE_YAXIS;
else {
i = atoi(optarg);
/*
* Use button i for negative Z axis movement and
* button (i + 1) for positive Z axis movement.
*/
if ((i <= 0) || (i > MOUSE_MAXBUTTON - 1)) {
warnx("invalid argument `%s'", optarg);
usage();
}
rodent.zmap[0] = i;
rodent.zmap[1] = i + 1;
debug("optind: %d, optarg: '%s'", optind, optarg);
for (j = 1; j < 4; ++j) {
if ((optind >= argc) || !isdigit(*argv[optind]))
break;
i = atoi(argv[optind]);
if ((i <= 0) || (i > MOUSE_MAXBUTTON - 1)) {
warnx("invalid argument `%s'", argv[optind]);
usage();
}
rodent.zmap[j] = i;
++optind;
}
if ((rodent.zmap[2] != 0) && (rodent.zmap[3] == 0))
rodent.zmap[3] = rodent.zmap[2] + 1;
}
break;
case 'C':
rodent.clickthreshold = atoi(optarg);
if ((rodent.clickthreshold < 0) ||
(rodent.clickthreshold > MAX_CLICKTHRESHOLD)) {
warnx("invalid argument `%s'", optarg);
usage();
}
break;
case 'H':
rodent.flags |= HVirtualScroll;
break;
case 'I':
pidfile = optarg;
break;
case 'L':
rodent.scrollspeed = atoi(optarg);
if (rodent.scrollspeed < 0) {
warnx("invalid argument `%s'", optarg);
usage();
}
break;
case 'q':
config_file = optarg;
break;
case 'Q':
quirks_path = optarg;
break;
case 'T':
opt_drift_terminate = true;
sscanf(optarg, "%u,%u,%u", &opt_drift_distance,
&opt_drift_time, &opt_drift_after);
if (opt_drift_distance == 0 ||
opt_drift_time == 0 ||
opt_drift_after == 0) {
warnx("invalid argument `%s'", optarg);
usage();
}
break;
case 'V':
rodent.flags |= VirtualScroll;
break;
case 'U':
rodent.scrollthreshold = atoi(optarg);
if (rodent.scrollthreshold < 0) {
warnx("invalid argument `%s'", optarg);
usage();
}
break;
case 'h':
case '?':
default:
usage();
}
/* fix Z axis mapping */
for (i = 0; i < 4; ++i) {
if (rodent.zmap[i] > 0) {
for (j = 0; j < MOUSE_MAXBUTTON; ++j) {
if (mstate[j] == &bstate[rodent.zmap[i] - 1])
mstate[j] = &zstate[i];
}
rodent.zmap[i] = 1 << (rodent.zmap[i] - 1);
}
}
if (rodent.dev.path == NULL) {
warnx("no port name specified");
usage();
}
switch (setjmp(env)) {
case SIGHUP:
quirks_unref(rodent.quirks);
quirks_context_unref(quirks);
close(rodent.mfd);
/* FALLTHROUGH */
case 0:
break;
case SIGINT:
case SIGQUIT:
case SIGTERM:
exit(0);
/* NOT REACHED */
default:
goto out;
}
signal(SIGHUP , reset);
signal(SIGINT , reset);
signal(SIGQUIT, reset);
signal(SIGTERM, reset);
signal(SIGUSR1, pause_mouse);
rodent.mfd = open(rodent.dev.path, O_RDWR | O_NONBLOCK);
if (rodent.mfd == -1) {
logerr(1, "unable to open %s", rodent.dev.path);
goto out;
}
quirks = quirks_init_subsystem(config_file, quirks_path,
log_or_warn_va,
background ? QLOG_MOUSED_LOGGING : QLOG_CUSTOM_LOG_PRIORITIES);
if (quirks == NULL)
logwarnx("cannot open configuration file %s", config_file);
switch (r_identify(rodent.mfd, &rodent.dev)){
case DEVICE_TYPE_UNKNOWN:
debug("cannot determine device type on %s", rodent.dev.path);
goto out;
case DEVICE_TYPE_MOUSE:
case DEVICE_TYPE_TOUCHPAD:
break;
default:
debug("unsupported device type: %s on %s",
r_name(rodent.dev.type), rodent.dev.path);
goto out;
}
if (grab && ioctl(rodent.mfd, EVIOCGRAB, 1) == -1) {
logwarnx("unable to grab %s", rodent.dev.path);
goto out;
}
/* print some information */
if (identify != ID_NONE) {
if (identify == ID_ALL)
printf("%s %s %s\n", rodent.dev.path,
r_name(rodent.dev.type), rodent.dev.name);
else if (identify & ID_PORT)
printf("%s\n", rodent.dev.path);
else if (identify & ID_TYPE)
printf("%s\n", r_name(rodent.dev.type));
else if (identify & ID_MODEL)
printf("%s\n", rodent.dev.name);
exit(0);
} else {
debug("port: %s type: %s model: %s",
rodent.dev.path, r_name(rodent.dev.type), rodent.dev.name);
}
rodent.quirks = quirks_fetch_for_device(quirks, &rodent.dev);
r_init(); /* call init function */
moused();
quirks_unref(rodent.quirks);
out:
quirks_context_unref(quirks);
if (rodent.mfd != -1)
close(rodent.mfd);
if (rodent.cfd != -1)
close(rodent.cfd);
exit(0);
}
/*
* Function to calculate linear acceleration.
*
* If there are any rounding errors, the remainder
* is stored in the remainx and remainy variables
* and taken into account upon the next movement.
*/
static void
linacc(int dx, int dy, int dz, int *movex, int *movey, int *movez)
{
double fdx, fdy, fdz;
if (dx == 0 && dy == 0 && dz == 0) {
*movex = *movey = *movez = 0;
return;
}
fdx = dx * rodent.accelx + rodent.remainx;
fdy = dy * rodent.accely + rodent.remainy;
fdz = dz * rodent.accelz + rodent.remainz;
*movex = lround(fdx);
*movey = lround(fdy);
*movez = lround(fdz);
rodent.remainx = fdx - *movex;
rodent.remainy = fdy - *movey;
rodent.remainz = fdz - *movez;
}
/*
* Function to calculate exponential acceleration.
* (Also includes linear acceleration if enabled.)
*
* In order to give a smoother behaviour, we record the four
* most recent non-zero movements and use their average value
* to calculate the acceleration.
*/
static void
expoacc(int dx, int dy, int dz, int *movex, int *movey, int *movez)
{
static double lastlength[3] = {0.0, 0.0, 0.0};
double fdx, fdy, fdz, length, lbase, accel;
if (dx == 0 && dy == 0 && dz == 0) {
*movex = *movey = *movez = 0;
return;
}
fdx = dx * rodent.accelx;
fdy = dy * rodent.accely;
fdz = dz * rodent.accelz;
length = sqrt((fdx * fdx) + (fdy * fdy)); /* Pythagoras */
length = (length + lastlength[0] + lastlength[1] + lastlength[2]) / 4;
lbase = length / rodent.expoffset;
accel = pow(lbase, rodent.expoaccel) / lbase;
fdx = fdx * accel + rodent.remainx;
fdy = fdy * accel + rodent.remainy;
*movex = lround(fdx);
*movey = lround(fdy);
*movez = lround(fdz);
rodent.remainx = fdx - *movex;
rodent.remainy = fdy - *movey;
rodent.remainz = fdz - *movez;
lastlength[2] = lastlength[1];
lastlength[1] = lastlength[0];
lastlength[0] = length; /* Insert new average, not original length! */
}
static void
moused(void)
{
struct mouse_info mouse;
mousestatus_t action0; /* original mouse action */
mousestatus_t action; /* interim buffer */
mousestatus_t action2; /* mapped action */
int timeout;
bool timeout_em3b;
struct pollfd fds;
struct input_event b;
pid_t mpid;
int flags;
int c;
int i;
if ((rodent.cfd = open("/dev/consolectl", O_RDWR, 0)) == -1)
logerr(1, "cannot open /dev/consolectl");
if (!nodaemon && !background) {
pfh = pidfile_open(pidfile, 0600, &mpid);
if (pfh == NULL) {
if (errno == EEXIST)
logerrx(1, "moused already running, pid: %d", mpid);
logwarn("cannot open pid file");
}
if (daemon(0, 0)) {
int saved_errno = errno;
pidfile_remove(pfh);
errno = saved_errno;
logerr(1, "failed to become a daemon");
} else {
background = true;
pidfile_write(pfh);
}
}
/* clear mouse data */
bzero(&action0, sizeof(action0));
bzero(&action, sizeof(action));
bzero(&action2, sizeof(action2));
bzero(&mouse, sizeof(mouse));
mouse_button_state = S0;
clock_gettime(CLOCK_MONOTONIC_FAST, &mouse_button_state_ts);
mouse_move_delayed = 0;
for (i = 0; i < MOUSE_MAXBUTTON; ++i) {
bstate[i].count = 0;
bstate[i].ts = mouse_button_state_ts;
}
for (i = 0; i < (int)(sizeof(zstate) / sizeof(zstate[0])); ++i) {
zstate[i].count = 0;
zstate[i].ts = mouse_button_state_ts;
}
/* process mouse data */
for (;;) {
fds.fd = rodent.mfd;
fds.events = POLLIN;
fds.revents = 0;
timeout = -1;
if ((rodent.flags & Emulate3Button) && S_DELAYED(mouse_button_state)) {
timeout = 20;
timeout_em3b = true;
}
if (gesture.idletimeout != -1) {
if (timeout == -1 || gesture.idletimeout < timeout) {
timeout = gesture.idletimeout;
timeout_em3b = false;
} else
gesture.idletimeout -= timeout;
}
c = poll(&fds, 1, timeout);
if (c < 0) { /* error */
logwarn("failed to read from mouse");
continue;
} else if (c == 0 && timeout_em3b) { /* timeout */
/* assert(rodent.flags & Emulate3Button) */
action0.button = action0.obutton;
action0.dx = action0.dy = action0.dz = 0;
action0.flags = flags = 0;
if (r_timeout() && r_statetrans(&action0, &action, A_TIMEOUT)) {
if (debug > 2)
debug("flags:%08x buttons:%08x obuttons:%08x",
action.flags, action.button, action.obutton);
} else {
action0.obutton = action0.button;
continue;
}
} else {
/* mouse movement */
if (c > 0) {
if ((fds.revents & POLLIN) == 0)
return;
if (read(rodent.mfd, &b, sizeof(b)) == -1) {
if (errno == EWOULDBLOCK)
continue;
else
return;
}
} else {
b.time.tv_sec = timeout == 0 ? 0 : LONG_MAX;
b.time.tv_usec = 0;
b.type = EV_SYN;
b.code = SYN_REPORT;
b.value = 1;
}
gesture.idletimeout = -1;
if ((flags = r_protocol(&b, &action0)) == 0)
continue;
if ((rodent.flags & VirtualScroll) || (rodent.flags & HVirtualScroll)) {
/* Allow middle button drags to scroll up and down */
if (action0.button == MOUSE_BUTTON2DOWN) {
if (scroll.state == SCROLL_NOTSCROLLING) {
scroll.state = SCROLL_PREPARE;
scroll.movement = scroll.hmovement = 0;
debug("PREPARING TO SCROLL");
}
debug("[BUTTON2] flags:%08x buttons:%08x obuttons:%08x",
action.flags, action.button, action.obutton);
} else {
debug("[NOTBUTTON2] flags:%08x buttons:%08x obuttons:%08x",
action.flags, action.button, action.obutton);
/* This isn't a middle button down... move along... */
if (scroll.state == SCROLL_SCROLLING) {
/*
* We were scrolling, someone let go of button 2.
* Now turn autoscroll off.
*/
scroll.state = SCROLL_NOTSCROLLING;
debug("DONE WITH SCROLLING / %d", scroll.state);
} else if (scroll.state == SCROLL_PREPARE) {
mousestatus_t newaction = action0;
/* We were preparing to scroll, but we never moved... */
r_timestamp(&action0);
r_statetrans(&action0, &newaction,
A(newaction.button & MOUSE_BUTTON1DOWN,
action0.button & MOUSE_BUTTON3DOWN));
/* Send middle down */
newaction.button = MOUSE_BUTTON2DOWN;
r_click(&newaction);
/* Send middle up */
r_timestamp(&newaction);
newaction.obutton = newaction.button;
newaction.button = action0.button;
r_click(&newaction);
}
}
}
r_timestamp(&action0);
r_statetrans(&action0, &action,
A(action0.button & MOUSE_BUTTON1DOWN,
action0.button & MOUSE_BUTTON3DOWN));
debug("flags:%08x buttons:%08x obuttons:%08x", action.flags,
action.button, action.obutton);
}
action0.obutton = action0.button;
flags &= MOUSE_POSCHANGED;
flags |= action.obutton ^ action.button;
action.flags = flags;