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#if NODEF
gcc -o event event.c -Wall -Wextra -Werror -g
exit 0
#endif
// Copyright (C) 2022 johannst
#include <stdio.h>
#include <fcntl.h>
#include <assert.h>
#include <unistd.h>
#include <time.h>
#include <sys/time.h>
#include <linux/input-event-codes.h>
struct input_event {
struct timeval time;
unsigned short type;
unsigned short code;
unsigned int value;
};
const char* type(unsigned short t) {
static char buf[32];
const char* fmt = "0x%x";
switch (t) {
#define FMT(TYPE) case TYPE: fmt = #TYPE"(0x%x)"; break
FMT(EV_SYN);
FMT(EV_KEY);
FMT(EV_REL);
FMT(EV_ABS);
#undef FMT
}
snprintf(buf, sizeof(buf), fmt, t);
return buf;
}
const char* code(unsigned short c) {
static char buf[32];
const char* fmt = "0x%x";
switch (c) {
#define FMT(CODE) case CODE: fmt = #CODE"(0x%x)"; break
FMT(BTN_LEFT);
FMT(BTN_RIGHT);
FMT(BTN_MIDDLE);
FMT(REL_X);
FMT(REL_Y);
#undef FMT
}
snprintf(buf, sizeof(buf), fmt, c);
return buf;
}
const char* timefmt(const struct timeval* t) {
assert(t);
struct tm* lt = localtime(&t->tv_sec); // Returns pointer to static tm object.
static char buf[64];
strftime(buf, sizeof(buf), "%H:%M:%S", lt);
return buf;
}
int main(int argc, char* argv[]) {
assert(argc == 2);
int fd = open(argv[1], O_RDONLY);
assert(fd != -1);
struct input_event inp;
while (1) {
int ret = read(fd, &inp, sizeof(inp));
assert(ret == sizeof(inp));
printf("time: %s type: %s code: %s value: 0x%x\n",
timefmt(&inp.time), type(inp.type), code(inp.code), inp.value);
}
}
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