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evmapd.c
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/*
* evmapd - An input event remapping daemon for Linux
*
* Copyright (c) 2007 Theodoros V. Kalamatianos <[email protected]>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
*
* Compilation:
*
* gcc -Wall -lcfg+ evmapd.c -o evmapd
*/
#define UINPUT_DEVICE "/dev/input/uinput"
#define DEBUG 1
#include <cfg+.h>
#define CFG_MV CFG_MULTI
#define CFG_MS CFG_MULTI_SEPARATED
#include <errno.h>
#include <fcntl.h>
#include <linux/input.h>
#include <linux/uinput.h>
#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <syslog.h>
#include <unistd.h>
#define msg(m, ...) info("%s: " m, argv0, ##__VA_ARGS__)
#define RETERR(c, E, r, m, ...) if (c) { \
int e = (E)?(r):(errno); \
msg(m ": %s\n", ##__VA_ARGS__ , strerror(e)); \
return e; \
}
#define RETERN(c, m, ...) RETERR(c, 0, 0, m, ##__VA_ARGS__)
#define cfree(p) if (p != NULL) free(p);
static int detach = 0, grab = 0, log = 0, quiet = 0, verbose = 0;
static char *argv0, *idev = NULL, *pidfile = NULL;
static int ifp = -1, ofp = -1;
static int *kkm = NULL, *krm = NULL, *kam = NULL, *rkm = NULL, *rrm = NULL;
static int *ram = NULL, *akm = NULL, *arm = NULL, *aam = NULL, **nm = NULL;
#define ARR(a, c, x, y) ((a)[((x) * (c)) + (y)])
#define KKM(x, y) ARR(kkm, 2, (x), (y))
#define KRM(x, y) ARR(krm, 3, (x), (y))
#define KAM(x, y) ARR(kam, 3, (x), (y))
#define RKM(x, y) ARR(rkm, 3, (x), (y))
#define RRM(x, y) ARR(rrm, 2, (x), (y))
#define RAM(x, y) ARR(ram, 2, (x), (y))
#define AKM(x, y) ARR(akm, 3, (x), (y))
#define ARM(x, y) ARR(arm, 2, (x), (y))
#define AAM(x, y) ARR(aam, 2, (x), (y))
int info(const char *fmt, ...)
{
va_list args;
int ret = 0;
va_start(args, fmt);
if (fileno(stderr) >= 0)
ret = vfprintf(stderr, fmt, args);
if (log > 1)
vsyslog(LOG_NOTICE, fmt, args);
va_end(args);
return ret;
}
/* PID file creation */
static int write_pid() {
FILE *fp;
fp = fopen(pidfile, "w");
if (fp == NULL)
return -1;
fprintf(fp, "%i\n", getpid());
if (verbose)
info("Wrote PID file %s\n", pidfile);
fclose(fp);
return 0;
}
static void rfree(void **v)
{
int i;
if (v == NULL)
return;
for (i = 0; v[i] != NULL; ++i)
free(v[i]);
free(v);
}
/* Allow SIGTERM to cause graceful termination */
void on_term(int s)
{
int ret;
if (detach)
info("evmapd %s terminating for %s\n", VERSION, idev);
if (grab) {
ret = ioctl(ifp, EVIOCGRAB, (void *)0);
if (ret != 0)
msg("Warning: could not release %s\n", idev);
}
if (log)
closelog();
close(ifp);
close(ofp);
cfree(idev);
cfree(kkm);
cfree(krm);
cfree(kam);
cfree(rkm);
cfree(rrm);
cfree(ram);
cfree(akm);
cfree(arm);
cfree(aam);
rfree((void **)nm);
if (pidfile != NULL) {
unlink(pidfile);
free(pidfile);
}
exit(0);
return;
}
/* Convert an array of strings to an int array */
static int str_int(char **s, int **r, char *conv, int col)
{
int c[4] = { 0, 0, 0, 0 }, i, j, m = 0, n = 0, ret;
*r = NULL;
if (s == NULL)
return 0;
if ((col < 1) || (col > 4))
return -1;
/* Count the valid strings */
for (i = 0; s[i] != NULL; i++) {
ret = sscanf(s[i], conv, &(c[0]), &(c[1]), &(c[2]), &(c[3]));
if (ret == col)
++n;
}
if (n == 0)
return 0;
*r = malloc((n + 1) * col * sizeof(int));
if (*r == NULL)
return -1;
/* Assign valid strings */
for (i = 0; s[i] != NULL; i++) {
ret = sscanf(s[i], conv, &(c[0]), &(c[1]), &(c[2]), &(c[3]));
if (ret == col) {
for (j = 0; j < col; ++j)
ARR(*r, col, m, j) = c[j];
++m;
#if DEBUG
if (m > n) {
msg("Internal error [%i]", __LINE__);
errno = ECANCELED;
return -1;
}
#endif
}
}
for (i = 0; i < col; ++i)
ARR(*r, col, n, i) = -1;
#if DEBUG
if (m != n) {
msg("Internal error [%i]", __LINE__);
errno = ECANCELED;
return -1;
}
#endif
return 0;
}
#define STRINT(s, r, conv, col) ret = str_int(s, &r, conv, col); \
RETERN(ret < 0, "String array conversion failed"); \
rfree((void **)s);
#define VERTRIPLET(v) (v >> 16), (v >> 8) & 0xff, (v & 0xff)
#define USAGE "evmapd Version " VERSION "\n" \
"Usage: evmapd -i <input_device> [options]\n" \
" General options:\n" \
" -D, --daemon Launch in daemon mode\n" \
" -g, --grab Grab the input device\n" \
" -h, --help Show this help text\n" \
" -i, --idev <device> Specify the device to use for input\n" \
" -l, --log Use the syslog facilities for logging\n" \
" -o, --odev <device> Specify the device to use for output\n" \
" -p, --pidfile <file> Use a file to store the PID\n" \
" -q, --quiet Suppress all console messages\n" \
" -v, --verbose Emit more verbose messages\n" \
" -V, --version Show version information\n" \
"\n" \
" Event remapping options:\n" \
" --key-key <from-key>:<to-key>\n" \
" --key-rel <from-min-key>,<from-max-key>:<to-rel>\n" \
" --key-abs <from-min-key>,<from-max-key>:<to-abs>\n" \
" --rel-key <from-rel>:<to-min-key>,<to-max-key>\n" \
" --rel-rel <from-rel>:<to-rel>\n" \
" --rel-abs <from-rel>:<to-abs>\n" \
" --abs-key <from-abs>:<to-min-key>,<to-max-key>\n" \
" --abs-rel <from-abs>:<to-rel>\n" \
" --abs-abs <from-abs>:<to-abs>\n" \
"\n" \
" <*-key>, <*-rel> and <*-abs> are numeric event codes.\n" \
" Multiple remapping options may be specified.\n" \
"\n" \
" Default values:\n" \
" --absconf <default-abs-min>,<default-abs-max>\n" \
" --relconf <default-rel-min>,<default-rel-max>\n" \
"\n" \
" ABS event normalisation options:\n" \
" --norm <abs>[,<abs>...]\n" \
" --normconf <ignore>[,<range>[,<rst>[,<spike>[,<min-spike>]]]]\n" \
"\n" \
" <abs> Input axis to normalise.\n" \
"\n" \
" <ignore> Number of initial events to ignore. Avoids\n" \
" confusing the normalisation code when the\n" \
" device is still settling.\n" \
"\n" \
" <range> Require at least 1/<range> coverage of the\n" \
" absolute range to perform normalisation.\n" \
"\n" \
" <rst> Reset the normalisation algorithm every <rst>\n" \
" ABS events.\n" \
"\n" \
" <spike> Ignore ABS axis changes over 1/<spike> of the\n" \
" absolute range. May help with devices that\n" \
" every now and then perform erratically and\n" \
" send out random values\n" \
"\n" \
" <min-spike> Require <min-spike> absolute range to perform\n" \
" spike detection. Setting this to a small value\n" \
" avoids algorithm artifacts with devices with\n" \
" small ranges, such as joystick POV switches.\n" \
"\n" \
" The --norm option may be used multiple times to specify more\n" \
" than one ABS axis to perform normalisation on.\n" \
"\n"
static int usage(int r)
{
info(USAGE);
return r;
}
#define EV_EV 0
#define LEN(t, b) (((b - 1) / (sizeof(t) * 8)) + 1)
#define POS(c, b) (b / (sizeof((c)[0]) * 8))
#define OFF(c, b) (b % (sizeof((c)[0]) * 8))
#define GET(c, b) ((c[POS(c, b)] >> OFF(c, b)) & 1)
#define SET(c, b, v) (c)[POS(c, b)] = (((c)[POS(c, b)] & ~(1 << OFF(c, b))) | (((v) > 0) << OFF(c, b)))
#if DEBUG
#define INQ(i, m) ret = ioctl(ifp, i, m); \
RETERN(ret < 0, "Unable to query input device %s (" #i ") [%i]", idev, __LINE__)
#define OSET(i, m) ret = ioctl(ofp, i, m); \
RETERN(ret < 0, "Unable to configure output device %s (" #i ") [%i]", odev, __LINE__)
#else
#define INQ(i, m) ret = ioctl(ifp, i, m); \
RETERN(ret < 0, "Unable to query input device %s (" #i ")", idev)
#define OSET(i, m) ret = ioctl(ofp, i, m); \
RETERN(ret < 0, "Unable to configure output device %s (" #i ")", odev)
#endif
#define OSETBIT(get,set,max) for (i = 0; i < max; ++i) \
if GET(obits[get], i) \
OSET(set, i); \
#define NONEG(x) if (x < 0) x = 0;
#define AC ac[ev.code]
static void listbits(unsigned long evbits[EV_MAX][LEN(long, KEY_MAX)], int bits, int max, char *dsc)
{
int i, j = 0;
if GET(evbits[0], bits) {
info("\t%s:\n", dsc);
for (i = 0; i < max; ++i) {
if GET(evbits[bits], i) {
if ((j % 8) == 0)
info("\t");
info("\t%d", i);
++j;
if ((j % 8) == 0)
info("\n");
}
}
info("\n%s", ((j % 8) != 0)?"\n":"");
}
}
int main(int argc, char **argv)
{
int help = 0, version = 0;
int amin = -32767, amax = 32767, rmin = -128, rmax = 128;
int nign = 0, nrng = 0, nrst = 0, nspk = 0, nspkmin = 2;
char *odev = UINPUT_DEVICE;
int iver;
char iphys[256];
struct uinput_user_dev uidev = {};
unsigned long ibits[EV_MAX][LEN(long, KEY_MAX)];
char ophys[256];
struct uinput_user_dev uodev = {};
unsigned long obits[EV_MAX][LEN(long, KEY_MAX)];
int i, j, ret;
unsigned long rbits[EV_MAX][LEN(long, KEY_MAX)];
struct input_event ev;
argv0 = argv[0];
char **kkmap = NULL, **krmap = NULL, **kamap = NULL, **rkmap = NULL, **rrmap = NULL;
char **ramap = NULL, **akmap = NULL, **armap = NULL, **aamap = NULL;
char *acfg = NULL, *ncfg = NULL, *rcfg = NULL;
struct cfg_option options[] = {
{"daemon", 'D', NULL, CFG_BOOL, (void *) &detach, 0},
{"grab", 'g', NULL, CFG_BOOL, (void *) &grab, 0},
{"help", 'h', NULL, CFG_BOOL, (void *) &help, 0},
{"log", 'l', NULL, CFG_BOOL, (void *) &log, 0},
{"quiet", 'q', NULL, CFG_BOOL, (void *) &quiet, 0},
{"verbose", 'v', NULL, CFG_BOOL, (void *) &verbose, 0},
{"version", 'V', NULL, CFG_BOOL, (void *) &version, 0},
{"idev", 'i', NULL, CFG_STR, (void *) &idev, 0},
{"odev", 'o', NULL, CFG_STR, (void *) &odev, 0},
{"pidfile", 'p', NULL, CFG_STR, (void *) &pidfile, 0},
{"key-key", 0, NULL, CFG_STR+CFG_MV, (void *) &kkmap, 0},
{"key-rel", 0, NULL, CFG_STR+CFG_MV, (void *) &krmap, 0},
{"key-abs", 0, NULL, CFG_STR+CFG_MV, (void *) &kamap, 0},
{"rel-key", 0, NULL, CFG_STR+CFG_MV, (void *) &rkmap, 0},
{"rel-rel", 0, NULL, CFG_STR+CFG_MV, (void *) &rrmap, 0},
{"rel-abs", 0, NULL, CFG_STR+CFG_MV, (void *) &ramap, 0},
{"abs-key", 0, NULL, CFG_STR+CFG_MV, (void *) &akmap, 0},
{"abs-rel", 0, NULL, CFG_STR+CFG_MV, (void *) &armap, 0},
{"abs-abs", 0, NULL, CFG_STR+CFG_MV, (void *) &aamap, 0},
{"absconf", 0, NULL, CFG_STR, (void *) &acfg, 0},
{"relconf", 0, NULL, CFG_STR, (void *) &rcfg, 0},
{"norm", 0, NULL, CFG_INT+CFG_MS, (void *) &nm, 0},
{"normconf", 0, NULL, CFG_STR, (void *) &ncfg, 0},
CFG_END_OF_LIST
};
CFG_CONTEXT cxt = cfg_get_context(options);
RETERN(cxt == NULL, "Cannot parse command line arguments");
cfg_set_cmdline_context(cxt, 1, -1, argv);
ret = cfg_parse(cxt);
if (ret != CFG_OK) {
msg("Cannot parse command line arguments: %s\n", cfg_get_error_str(cxt));
return EINVAL;
}
if (help)
return usage(0);
if (version) {
info("evmapd Version " VERSION "\n");
return 0;
}
if (idev == NULL) {
msg("No input device specified\n\n");
return usage(EINVAL);
}
/* Map parsing */
STRINT(kkmap, kkm, "%i:%i", 2);
STRINT(krmap, krm, "%i,%i:%i", 3);
STRINT(kamap, kam, "%i,%i:%i", 3);
STRINT(rkmap, rkm, "%i:%i,%i", 3);
STRINT(rrmap, rrm, "%i:%i", 2);
STRINT(ramap, ram, "%i:%i", 2);
STRINT(akmap, akm, "%i:%i,%i", 3);
STRINT(armap, arm, "%i:%i", 2);
STRINT(aamap, aam, "%i:%i", 2);
/* Fine-tuning controls */
if (acfg != NULL) {
ret = sscanf(acfg, "%i,%i", &amin, &amax);
RETERR(ret < 1, ret >= 0, EINVAL, "Could not parse absconf parameters");
free(acfg);
}
if (rcfg != NULL) {
ret = sscanf(rcfg, "%i,%i", &rmin, &rmax);
RETERR(ret < 1, ret >= 0, EINVAL, "Could not parse relconf parameters");
free(rcfg);
}
if (ncfg != NULL) {
ret = sscanf(ncfg, "%i,%i,%i,%i,%i", &nign, &nrng, &nrst, &nspk, &nspkmin);
RETERR(ret < 1, ret >= 0, EINVAL, "Could not parse normconf parameters");
free(ncfg);
NONEG(nign); NONEG(nrng); NONEG(nrst); NONEG(nspk); NONEG(nspkmin);
}
/* Setup ABS auto-calibration code */
enum { IGN, RDY, RMIN, RMAX, ACNT, AMIN, AMAX, LAST };
int ac[ABS_MAX + 1][8];
memset(ac, 0, sizeof(ac));
for (i = 0; i <= ABS_MAX; ++i) {
ac[i][IGN] = nign;
}
/* Open the syslog facility */
if (log == 1) {
openlog("evmapd", LOG_PID, LOG_DAEMON);
log = 2;
}
if (quiet && !detach) {
fclose(stdin);
fclose(stdout);
fclose(stderr);
}
/* Open the input device */
ifp = open(idev, O_RDONLY);
RETERN(ifp < 0, "Unable to open input device %s", idev);
/* Open the output device */
ofp = open(odev, O_WRONLY);
RETERN(ofp < 0, "Unable to open output device %s", odev);
/* Grab the input device */
if (grab) {
ret = ioctl(ifp, EVIOCGRAB, (void *)1);
RETERN(ret < 0, "Unable to grab input device %s", idev);
}
/* Get the input device information */
memset(ibits, 0, sizeof(ibits));
memset(rbits, 0, sizeof(rbits));
memset(obits, 0, sizeof(obits));
INQ(EVIOCGVERSION, &iver);
INQ(EVIOCGID, &(uidev.id));
INQ(EVIOCGNAME(sizeof(uidev.name)), uidev.name);
INQ(EVIOCGPHYS(sizeof(iphys)), iphys);
INQ(EVIOCGBIT(0, EV_MAX), ibits[0]);
for (i = 1; i < EV_MAX; ++i) {
if GET(ibits[0], i) {
INQ(EVIOCGBIT(i, LEN(long, KEY_MAX) * sizeof(long)), ibits[i]);
if (i == EV_ABS) {
for (j = 0; j < ABS_MAX; ++j) {
if GET(ibits[i], j) {
struct input_absinfo abs;
INQ(EVIOCGABS(j), &abs);
uidev.absmax[j] = abs.maximum;
uidev.absmin[j] = abs.minimum;
uidev.absfuzz[j] = abs.fuzz;
uidev.absflat[j] = abs.flat;
}
}
}
}
}
/* Print input device information */
if (verbose) {
info("Input device: %s\n"
"\tName: %s\n"
"\tPhys: %s\n"
"\tBus: %u / Vendor: %u / Product: %u / Version: %u.%u.%u / Driver: %d.%d.%d\n"
"\n",
idev,
uidev.name,
iphys,
uidev.id.bustype, uidev.id.vendor, uidev.id.product, VERTRIPLET(uidev.id.version), VERTRIPLET(iver)
);
info("\tEvent types:");
for (i = 1; i < EV_MAX; ++i)
if GET(ibits[0], i)
info(" %i", i);
info("\n\n");
listbits(ibits, EV_KEY, KEY_MAX, "KEY");
listbits(ibits, EV_REL, REL_MAX, "REL");
if GET(ibits[0], EV_ABS) {
info("\tABS:\n");
for (i = 0; i < ABS_MAX; ++i)
if GET(ibits[EV_ABS], i)
info("\t\t%2d) Min:%6d Max:%6d Fuzz:%6d Flat:%6d\n", i,
uidev.absmin[i], uidev.absmax[i], uidev.absfuzz[i], uidev.absflat[i]);
info("\n");
}
if (nm != NULL) {
info("\t\tNormalised ABS axis:");
for (i = 0; nm[i] != NULL; ++i)
info(" %i", *(nm[i]));
info("\n\n");
}
listbits(ibits, EV_MSC, MSC_MAX, "MSC");
listbits(ibits, EV_SW, SW_MAX, "SW");
listbits(ibits, EV_LED, LED_MAX, "LED");
listbits(ibits, EV_SND, SND_MAX, "SND");
info("\n");
}
/* The output device information */
memset(&(uodev.id), 0, sizeof(uodev.id));
snprintf(ophys, sizeof(ophys), "evmapd/%i", getpid());
uodev = uidev;
if (kkm != NULL) {
SET(obits[EV_EV], EV_KEY, 1);
for (i = 0; KKM(i, 0) != -1; ++i)
if GET(ibits[EV_KEY], KKM(i, 0)) {
SET(rbits[EV_KEY], KKM(i, 0), 1);
SET(obits[EV_KEY], KKM(i, 1), 1);
}
}
if (krm != NULL) {
SET(obits[EV_EV], EV_REL, 1);
for (i = 0; KRM(i, 0) != -1; ++i)
if (GET(ibits[EV_KEY], KRM(i, 0)) &&
GET(ibits[EV_KEY], KRM(i, 1))) {
SET(rbits[EV_KEY], KRM(i, 0), 1);
SET(rbits[EV_KEY], KRM(i, 1), 1);
SET(obits[EV_REL], KRM(i, 2), 1);
}
}
if (kam != NULL) {
SET(obits[EV_EV], EV_ABS, 1);
for (i = 0; KAM(i, 0) != -1; ++i)
if (GET(ibits[EV_KEY], KAM(i, 0)) &&
GET(ibits[EV_KEY], KAM(i, 1))) {
SET(rbits[EV_KEY], KAM(i, 0), 1);
SET(rbits[EV_KEY], KAM(i, 1), 1);
SET(obits[EV_ABS], KAM(i, 2), 1);
if ((uodev.absmin[KAM(i, 2)] == 0) &&
(uodev.absmax[KAM(i, 2)] == 0)) {
uodev.absmin[KAM(i, 2)] = amin;
uodev.absmax[KAM(i, 2)] = amax;
}
}
}
if (rkm != NULL) {
SET(obits[EV_EV], EV_KEY, 1);
for (i = 0; RKM(i, 0) != -1; ++i)
if GET(ibits[EV_REL], RKM(i, 0)) {
SET(rbits[EV_REL], RKM(i, 0), 1);
SET(obits[EV_KEY], RKM(i, 1), 1);
SET(obits[EV_KEY], RKM(i, 2), 1);
}
}
if (rrm != NULL) {
SET(obits[EV_EV], EV_REL, 1);
for (i = 0; RRM(i, 0) != -1; ++i)
if GET(ibits[EV_REL], RRM(i, 0)) {
SET(rbits[EV_REL], RRM(i, 0), 1);
SET(obits[EV_REL], RRM(i, 1), 1);
}
}
if (ram != NULL) {
SET(obits[EV_EV], EV_ABS, 1);
for (i = 0; RAM(i, 0) != -1; ++i)
if GET(ibits[EV_REL], RAM(i, 0)) {
SET(rbits[EV_REL], RAM(i, 0), 1);
SET(obits[EV_ABS], RAM(i, 1), 1);
if ((uodev.absmin[RAM(i, 1)] == 0) &&
(uodev.absmax[RAM(i, 1)] == 0)) {
uodev.absmin[RAM(i, 1)] = amin;
uodev.absmax[RAM(i, 1)] = amax;
}
}
}
if (akm != NULL) {
SET(obits[EV_EV], EV_KEY, 1);
for (i = 0; AKM(i, 0) != -1; ++i)
if GET(ibits[EV_ABS], AKM(i, 0)) {
SET(rbits[EV_ABS], AKM(i, 0), 1);
SET(obits[EV_KEY], AKM(i, 1), 1);
SET(obits[EV_KEY], AKM(i, 2), 1);
}
}
if (arm != NULL) {
SET(obits[EV_EV], EV_REL, 1);
for (i = 0; ARM(i, 0) != -1; ++i)
if GET(ibits[EV_ABS], ARM(i, 0)) {
SET(rbits[EV_ABS], AKM(i, 0), 1);
SET(obits[EV_REL], ARM(i, 1), 1);
}
}
if (aam != NULL) {
SET(obits[EV_EV], EV_ABS, 1);
for (i = 0; AAM(i, 0) != -1; ++i)
if GET(ibits[EV_ABS], AAM(i, 0)) {
SET(rbits[EV_ABS], AAM(i, 0), 1);
SET(obits[EV_ABS], AAM(i, 1), 1);
if ((uodev.absmin[AAM(i, 1)] == 0) &&
(uodev.absmax[AAM(i, 1)] == 0)) {
uodev.absmin[AAM(i, 1)] = uodev.absmin[AAM(i, 0)];
uodev.absmax[AAM(i, 1)] = uodev.absmax[AAM(i, 0)];
uodev.absfuzz[AAM(i, 1)] = uodev.absfuzz[AAM(i, 0)];
uodev.absflat[AAM(i, 1)] = uodev.absflat[AAM(i, 0)];
}
}
}
/* Do not let through the remapped event bits */
for (i = 0; i < EV_MAX; ++i)
for (j = 0; j < LEN(long, KEY_MAX); ++j)
obits[i][j] |= (ibits[i][j] & ~rbits[i][j]);
/* Print output device information */
if (verbose) {
info("Output device: %s\n"
"\tName: %s\n"
"\tPhys: %s\n"
"\tBus: %u / Vendor: %u / Product: %u / Version: %u.%u.%u\n"
"\n",
odev,
uodev.name,
ophys,
uodev.id.bustype, uodev.id.vendor, uodev.id.product, VERTRIPLET(uodev.id.version)
);
info("\tEvent types:");
for (i = 1; i < EV_MAX; ++i)
if GET(obits[0], i)
info(" %i", i);
info("\n\n");
listbits(obits, EV_KEY, KEY_MAX, "KEY");
listbits(obits, EV_REL, REL_MAX, "REL");
if GET(obits[0], EV_ABS) {
info("\tABS:\n");
for (i = 0; i < ABS_MAX; ++i)
if GET(obits[EV_ABS], i)
info("\t\t%2d) Min:%6d Max:%6d Fuzz:%6d Flat:%6d\n", i,
uodev.absmin[i], uodev.absmax[i], uodev.absfuzz[i], uodev.absflat[i]);
info("\n");
}
listbits(obits, EV_MSC, MSC_MAX, "MSC");
listbits(obits, EV_SW, SW_MAX, "SW");
listbits(obits, EV_LED, LED_MAX, "LED");
listbits(obits, EV_SND, SND_MAX, "SND");
info("\n");
}
/* Clear force feedback capability until it is properly implemented. */
/* See <linux/uinput.h> ("To write a force-feedback-capable driver ...") */
SET(obits[0], EV_FF, 0);
/* Prepare the output device */
OSET(UI_SET_PHYS, ophys);
OSETBIT(EV_EV, UI_SET_EVBIT, EV_MAX);
OSETBIT(EV_KEY, UI_SET_KEYBIT, KEY_MAX);
OSETBIT(EV_REL, UI_SET_RELBIT, REL_MAX);
OSETBIT(EV_ABS, UI_SET_ABSBIT, ABS_MAX);
OSETBIT(EV_MSC, UI_SET_MSCBIT, MSC_MAX);
OSETBIT(EV_LED, UI_SET_LEDBIT, LED_MAX);
OSETBIT(EV_SND, UI_SET_SNDBIT, SND_MAX);
/* OSETBIT(EV_FF, UI_SET_FFBIT, FF_MAX); */
OSETBIT(EV_SW, UI_SET_SWBIT, SW_MAX);
ret = write(ofp, &uodev, sizeof(uodev));
RETERR(ret < (int)(sizeof(uodev)), ret >= 0, EIO, "Unable to configure output device %s", odev);
OSET(UI_DEV_CREATE, NULL);
/* Daemon mode */
if (detach) {
ret = daemon(0, 0);
RETERN(ret < 0, "Could not run in the background");
info("evmapd %s launched for %s using %s for output (PID: %i)\n",
VERSION, idev, odev, getpid());
}
/* PID file support */
if (pidfile != NULL) {
ret = write_pid();
RETERN(ret < 0, "Could not write PID file %s", pidfile);
}
/* Setup the signal handlers */
signal(SIGTERM, on_term);
#define _RCV ret = read(ifp, &ev, sizeof(ev)); \
RETERR(ret < (int)(sizeof(ev)), ret >= 0, EIO, "Unable to receive event from %s", idev);
#define _SND ret = write(ofp, &ev, sizeof(ev)); \
RETERR(ret < (int)(sizeof(ev)), ret >= 0, EIO, "Unable to send event to %s", odev); \
if (ev.type == EV_KEY) SET(rbits[EV_KEY], ev.code, ev.value);
#if DEBUG
#define RCV _RCV \
if (verbose) \
info("IN: %6i %6i %6i\n", ev.type, ev.code, ev.value);
#define SND if (verbose) \
info("OUT: %6i %6i %6i\n", ev.type, ev.code, ev.value); \
_SND
#else
#define RCV _RCV
#define SND _SND
#endif
/* The event loop */
memset(rbits, 0, sizeof(rbits));
while (1) {
int irng;
RCV;
/* Event processing */
j = 1;
ret = 1;
switch (ev.type) {
case EV_KEY:
if (ret && (kkm != NULL))
for (i = 0; KKM(i, 0) != -1; ++i)
if (KKM(i, 0) == ev.code) {
ev.code = KKM(i, 1);
ret = 0;
break;
}
if (ret && (krm != NULL))
for (i = 0; KRM(i, 0) != -1; ++i)
if ((KRM(i, 0) == ev.code) || (KRM(i, 1) == ev.code)) {
ev.type = EV_REL;
if (ev.value > 0)
ev.value = (ev.code == KRM(i, 0))?rmin:rmax;
else
ev.value = rmin + (rmax - rmin) / 2;
ev.code = KRM(i, 2);
ret = 0;
break;
}
if (ret && (kam != NULL))
for (i = 0; KAM(i, 0) != -1; ++i)
if ((KAM(i, 0) == ev.code) || (KAM(i, 1) == ev.code)) {
ev.type = EV_ABS;
if (ev.value > 0)
ev.value = (ev.code == KAM(i, 0))?
uodev.absmin[KAM(i, 2)]:uodev.absmax[KAM(i, 2)];
else
ev.value = uodev.absmin[KAM(i, 2)] +
(uodev.absmax[KAM(i, 2)] - uodev.absmin[KAM(i, 2)]) / 2;
ev.code = KAM(i, 2);
ret = 0;
break;
}
break;
case EV_REL:
if (ret && (rkm != NULL))
for (i = 0; RKM(i, 0) != -1; ++i)
if (RKM(i, 0) == ev.code) {
ev.type = EV_KEY;
if (ev.value < 0) {
if GET(rbits[EV_KEY], RKM(i, 2)) {
ev.code = RKM(i, 2);
ev.value = 0;
SND;
}
ev.code = RKM(i, 1);
ev.value = 1;
} else if (ev.value > 0) {
if GET(rbits[EV_KEY], RKM(i, 1)) {
ev.code = RKM(i, 1);
ev.value = 0;
SND;
}
ev.code = RKM(i, 2);
ev.value = 1;
} else {
j = 0;
ev.value = 0;
if GET(rbits[EV_KEY], RKM(i, 1)) {
ev.code = RKM(i, 1);
SND;
}
if GET(rbits[EV_KEY], RKM(i, 2)) {
ev.code = RKM(i, 2);
SND;
}
}
ret = 0;
break;
}
if (ret && (rrm != NULL))
for (i = 0; RRM(i, 0) != -1; ++i)
if (RRM(i, 0) == ev.code) {
ev.code = RRM(i, 1);
ret = 0;
break;
}
if (ret && (ram != NULL))
for (i = 0; RAM(i, 0) != -1; ++i)
if (RAM(i, 0) == ev.code) {
ev.type = EV_ABS;
ev.code = RAM(i, 1);
if (ev.value < rmin)
ev.value = rmin;
if (ev.value > rmax)
ev.value = rmax;
ev.value = ((ev.value - rmin) * (uodev.absmax[RAM(i, 1)] - uodev.absmin[RAM(i, 1)])) /
(rmax - rmin) + uodev.absmin[RAM(i, 1)];
ret = 0;
break;
}
break;
case EV_ABS:
irng = uidev.absmax[ev.code] - uidev.absmin[ev.code];
if (nm != NULL) {
/* Auto-calibration */
for (i = 0; nm[i] != NULL; ++i)
if (*(nm[i]) == ev.code) {
if (AC[RDY]) {
/* Spike protection */
if ((nspk > 0) && (nspkmin < irng)) {
if (labs((long)ev.value - (long)AC[LAST]) * (long)(nspk) > (long)irng)
break;
AC[LAST] = ev.value;
}
/* Auto-calibration reset code */
if (nrst > 0) {
if (AC[ACNT] > 0) {
++AC[ACNT];
if (ev.value < AC[AMIN])
AC[AMIN] = ev.value;
if (ev.value > AC[AMAX])
AC[AMAX] = ev.value;
if (AC[ACNT] >= nrst) {
if ((nrng == 0) || ((long)(AC[AMAX] - AC[AMIN]) * (long)nrng >= irng)) {
AC[RMIN] = AC[AMIN];
AC[RMAX] = AC[AMAX];
AC[AMIN] = 0;
AC[AMAX] = 0;
AC[ACNT] = 0;
} else {
AC[ACNT] = nrst - 1;
}
}
} else {
if (AC[AMIN] == 0) {
AC[AMIN] = ev.value;
} else {
if (AC[AMIN] < ev.value) {
AC[AMAX] = ev.value;
++AC[ACNT];
} else if (AC[AMIN] > ev.value) {
AC[AMAX] = AC[AMIN];
AC[AMIN] = ev.value;
++AC[ACNT];
}
}
}
}
if (ev.value < AC[RMIN])
AC[RMIN] = ev.value;
if (ev.value > AC[RMAX])
AC[RMAX] = ev.value;
/* The actual auto-calibration formula */
if ((nrng == 0) || ((long)(AC[RMAX] - AC[RMIN]) * (long)nrng >= irng))
ev.value = (irng * (ev.value - AC[RMIN])) / (AC[RMAX] - AC[RMIN]) +
uidev.absmin[ev.code];
} else {
/* Ignore initial events */
if (AC[IGN] > 0) {
--AC[IGN];
break;
}
if (AC[RMIN] == 0) {
AC[RMIN] = ev.value;
} else {
/* Spike protection */
if ((nspk > 0) && (nspkmin < irng)) {
if (labs((long)ev.value - (long)AC[RMIN]) * (long)(nspk) > (long)irng)
break;
AC[LAST] = ev.value;
}
if (AC[RMIN] < ev.value) {
AC[RMAX] = ev.value;
AC[RDY] = 1;
} else if (AC[RMIN] > ev.value) {
AC[RMAX] = AC[RMIN];
AC[RMIN] = ev.value;
AC[RDY] = 1;
}
}
}
}
}
if (ret && (akm != NULL))
for (i = 0; AKM(i, 0) != -1; ++i)
if (AKM(i, 0) == ev.code) {
ev.type = EV_KEY;
if (ev.value <= (uidev.absmin[ev.code] + (irng / 4))) {
if GET(rbits[EV_KEY], AKM(i, 2)) {
ev.code = AKM(i, 2);
ev.value = 0;
SND;
}
ev.code = AKM(i, 1);
ev.value = 1;
} else if (ev.value >= (uidev.absmax[ev.code] - (irng / 4))) {
if GET(rbits[EV_KEY], AKM(i, 1)) {
ev.code = AKM(i, 1);