1 files changed, 75 insertions, 0 deletions
diff --git a/linux/src/event.c b/linux/src/event.c
new file mode 100644
index 0000000..d047416
--- /dev/null
+++ b/linux/src/event.c
@@ -0,0 +1,75 @@
+#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);
+    }
+}