1 files changed, 52 insertions, 0 deletions
diff --git a/wheel_read.c b/wheel_read.c
new file mode 100644
index 0000000..ae6b4d9
--- /dev/null
+++ b/wheel_read.c
@@ -0,0 +1,52 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <string.h>
+#include <linux/input.h>
+
+void usage(const char *progname) {
+    fprintf(stderr, "Usage: %s /dev/input/eventX\n", progname);
+    exit(EXIT_FAILURE);
+}
+
+int main(int argc, char *argv[]) {
+    int fd;
+    struct input_event ev;
+    ssize_t n;
+
+    if (argc != 2) {
+        usage(argv[0]);
+    }
+
+    // Open the evdev device provided in the command line argument
+    fd = open(argv[1], O_RDONLY);
+    if (fd < 0) {
+        perror("Error opening device");
+        exit(EXIT_FAILURE);
+    }
+
+    printf("Listening for events on %s. Press Ctrl+C to exit.\n", argv[1]);
+
+    // Event reading loop
+    while (1) {
+        n = read(fd, &ev, sizeof(ev));
+        if (n == (ssize_t)-1) {
+            if (errno == EINTR) {printf("EINTR\n");
+                continue;}
+            perror("Error reading event");
+            break;
+        } else if (n != sizeof(ev)) {
+            fprintf(stderr, "Short read: %zd\n", n);
+            break;
+        }
+
+        // Print the event information
+        printf("Event: time %ld.%06ld, type %d, code %d, value %d\n",
+               ev.time.tv_sec, ev.time.tv_usec, ev.type, ev.code, ev.value);
+    }
+ 
+    close(fd);
+    return 0;
+}