76 lines
1.9 KiB
C
76 lines
1.9 KiB
C
#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <unistd.h>
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#include <linux/input.h>
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void dump_event(struct timespec* start, struct input_event* event);
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int stream_events(char* device_path);
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static inline void timespec_diff(struct timespec* a, struct timespec* b, struct timespec* result) {
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result->tv_sec = a->tv_sec - b->tv_sec;
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result->tv_nsec = a->tv_nsec - b->tv_nsec;
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if (result->tv_nsec < 0) {
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--result->tv_sec;
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result->tv_nsec += 1000000000L;
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}
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}
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void dump_event(struct timespec* start, struct input_event* event) {
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unsigned char button, bLeft, bMiddle, bRight;
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unsigned char *ptr = (unsigned char*)event;
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int i;
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char x, y;
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struct timespec now;
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struct timespec diff;
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clock_gettime(CLOCK_MONOTONIC, &now);
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timespec_diff(&now, start, &diff);
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button = ptr[0];
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bLeft = button & 0x1;
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bMiddle = ( button & 0x4 ) > 0;
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bRight = ( button & 0x2 ) > 0;
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x=(char) ptr[1];y=(char) ptr[2];
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printf("%ld.%ld,m,l%d,m%d,r%d,x%d,y%d\n",
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diff.tv_sec,
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diff.tv_nsec,
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bLeft, bMiddle, bRight, x, y);
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//
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// comment to disable the display of raw event structure datas
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//
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// for(i=0; i<sizeof(event); i++)
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// {
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// printf("%02X ", *ptr++);
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// }
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}
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int main(int argc, char* argv[]) {
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if(argc < 2) {
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fprintf(stderr, "You must specify a mouse input to track like /dev/input/mouse1.");
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exit(EXIT_FAILURE);
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}
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int result = stream_events(argv[1]);
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exit(result);
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}
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int stream_events(char* device_path) {
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int device_fd;
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struct timespec start;
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struct input_event event;
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if((device_fd = open(device_path, O_RDONLY)) == -1) {
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fprintf(stderr, "Failed to open %s. Are you running as root?\n", device_path);
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return 1;
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}
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else {
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fprintf(stderr, "Device open OK\n");
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}
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clock_gettime(CLOCK_MONOTONIC, &start);
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while(read(device_fd, &event, sizeof(struct input_event)))
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{
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dump_event(&start, &event);
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}
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}
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