event read-- read a event and print it out

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <fcntl.h>
#include <errno.h>
#include <time.h>
#include <linux/input.h>

#define test_bit(bit) (mask[(bit) / 8] & (1 << ((bit) % 8)))

int main(int argc, char **argv)
{
char name[64]; /* RATS: Use ok, but could be better */
char buf[256] = { 0, }; /* RATS: Use ok */
unsigned char mask[EV_MAX / 8 + 1]; /* RATS: Use ok */
int version;
int fd = 0;
int rc;
int i, j;
char *tmp;
struct input_event evCurrent;
struct input_event evLast = {{ 0 }, 0};

for(i = 0; i < 32; i++)
{
sprintf(name, "/dev/input/evCurrent%d", i);
if((fd = open(name, O_RDONLY, 0)) >= 0)
{
ioctl(fd, EVIOCGVERSION, &version);
ioctl(fd, EVIOCGNAME(sizeof(buf)), buf);
ioctl(fd, EVIOCGBIT(0, sizeof(mask)), mask);
printf("%s\n", name);
printf(" evdev version: %d.%d.%d\n", version >> 16, (version >> 8) & 0xff, version & 0xff);
printf(" name: %s\n", buf);
printf(" features:");
for(j = 0; j < EV_MAX; j++)
{
if(test_bit(j))
{
const char *type = "unknown";
switch(j)
{
case EV_KEY: type = "keys/buttons"; break;
case EV_REL: type = "relative"; break;
case EV_ABS: type = "absolute"; break;
case EV_MSC: type = "reserved"; break;
case EV_LED: type = "leds"; break;
case EV_SND: type = "sound"; break;
case EV_REP: type = "repeat"; break;
case EV_FF: type = "feedback"; break;
}
printf(" %s", type);
}
}
printf("\n");
close(fd);
}
}

if(argc > 1)
{
sprintf(name, "/dev/input/evCurrent%d", atoi(argv[1]));
if((fd = open(name, O_RDWR, 0)) >= 0)
{
printf("%s: open, fd = %d\n", name, fd);
for(i = 0; i < LED_MAX; i++)
{
evCurrent.time.tv_sec = time(0);
evCurrent.time.tv_usec = 0;
evCurrent.type = EV_LED;
evCurrent.code = i;
evCurrent.value = 0;
write(fd, &evCurrent, sizeof(evCurrent));
}

while((rc = read(fd, &evCurrent, sizeof(evCurrent))) > 0)
{
if(evLast.time.tv_sec == 0 && evLast.time.tv_usec == 0)
evLast = evCurrent;

printf("%-24.24s.%06lu type 0x%04x; code 0x%04x;" " value 0x%08x; ", ctime(&evCurrent.time.tv_sec),
evCurrent.time.tv_usec, evCurrent.type, evCurrent.code, evCurrent.value);

//we just care about release
if(evCurrent.value == 0)
{
i = evCurrent.time.tv_sec - evLast.time.tv_sec;
i *= 1000;
j = evCurrent.time.tv_usec - evLast.time.tv_usec;
j /= 1000;

if(i + j > 0)
{
printf(" Time Interval %d ms between press, release\n", i + j);
}
}

evLast = evCurrent;

switch(evCurrent.type)
{
case EV_KEY:
if(evCurrent.code > BTN_MISC)
{
printf("Button %d %s",
evCurrent.code & 0xff,
evCurrent.value ? "press" : "release");
}
else
{
printf("Key %d (0x%x) %s",
evCurrent.code & 0xff,
evCurrent.code & 0xff,
evCurrent.value ? "press" : "release");
}
break;
case EV_REL:
switch(evCurrent.code)
{
case REL_X: tmp = "X"; break;
case REL_Y: tmp = "Y"; break;
case REL_HWHEEL: tmp = "HWHEEL"; break;
case REL_DIAL: tmp = "DIAL"; break;
case REL_WHEEL: tmp = "WHEEL"; break;
case REL_MISC: tmp = "MISC"; break;
default: tmp = "UNKNOWN"; break;
}
printf("Relative %s %d", tmp, evCurrent.value);
break;
case EV_ABS:
switch(evCurrent.code)
{
case ABS_X: tmp = "X"; break;
case ABS_Y: tmp = "Y"; break;
case ABS_Z: tmp = "Z"; break;
case ABS_RX: tmp = "RX"; break;
case ABS_RY: tmp = "RY"; break;
case ABS_RZ: tmp = "RZ"; break;
case ABS_THROTTLE: tmp = "THROTTLE"; break;
case ABS_RUDDER: tmp = "RUDDER"; break;
case ABS_WHEEL: tmp = "WHEEL"; break;
case ABS_GAS: tmp = "GAS"; break;
case ABS_BRAKE: tmp = "BRAKE"; break;
case ABS_HAT0X: tmp = "HAT0X"; break;
case ABS_HAT0Y: tmp = "HAT0Y"; break;
case ABS_HAT1X: tmp = "HAT1X"; break;
case ABS_HAT1Y: tmp = "HAT1Y"; break;
case ABS_HAT2X: tmp = "HAT2X"; break;
case ABS_HAT2Y: tmp = "HAT2Y"; break;
case ABS_HAT3X: tmp = "HAT3X"; break;
case ABS_HAT3Y: tmp = "HAT3Y"; break;
case ABS_PRESSURE: tmp = "PRESSURE"; break;
case ABS_DISTANCE: tmp = "DISTANCE"; break;
case ABS_TILT_X: tmp = "TILT_X"; break;
case ABS_TILT_Y: tmp = "TILT_Y"; break;
case ABS_MISC: tmp = "MISC"; break;
default: tmp = "UNKNOWN"; break;
}
printf("Absolute %s %d", tmp, evCurrent.value);
break;
case EV_MSC: printf("Misc"); break;
case EV_LED: printf("Led"); break;
case EV_SND: printf("Snd"); break;
case EV_REP: printf("Rep"); break;
case EV_FF: printf("FF"); break;
break;
}
printf("\n");
}
printf("rc = %d, (%s)\n", rc, strerror(errno));
close(fd);
}
}
return(0);
}