From f8cf93243ccc2988b8911c11ff27db7e5aab0fbe Mon Sep 17 00:00:00 2001
From: Oxore <oxore@protonmail.com>
Date: Mon, 7 Mar 2022 02:18:20 +0300
Subject: Impl grabbing input device

---
 main.c | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/main.c b/main.c
index d3623ff..7085a43 100644
--- a/main.c
+++ b/main.c
@@ -9,6 +9,9 @@
 #include <signal.h>
 #include <inttypes.h>
 
+// TODO Impl repeating key when right thumb-stick tilted enough in any way
+// TODO Impl switching between keyboard and regular mode by BTN_MODE (the PS key)
+
 /* Analog Binarization Threshold */
 #define ABT 64
 /* Analog Binarization Hysteresis */
@@ -160,12 +163,21 @@ struct mapping g_mapping[MAPPINGS_NUM] = {
 };
 
 bool should_stop = false;
+int ifd = -1;
 
 static void sigint_handler(int _value)
 {
     (void) _value;
     should_stop = true;
     printf("Received SIGINT, quitting...\n");
+    {
+        int ret = ioctl(ifd, EVIOCGRAB, (void *)0);
+        if (ret != 0) {
+            fprintf(stderr, "Ungrab failed: ");
+            perror("ioctl(ifd, EVIOCGRAB, 0)");
+            exit(1);
+        }
+    }
     // Set default handler and re-issue the signal to unblock the read(3p) call
     signal(SIGINT, SIG_DFL);
     kill(0, SIGINT);
@@ -458,12 +470,20 @@ int main(int argc, char *argv[])
         exit(1);
     }
     const char *input_path = argv[1];
-    int ifd = open(input_path, O_RDONLY);
+    ifd = open(input_path, O_RDONLY);
     if (ifd == -1) {
         fprintf(stderr, "\"%s\": ", input_path);
         perror("open");
         exit(1);
     }
+    {
+        int ret = ioctl(ifd, EVIOCGRAB, (void *)1);
+        if (ret != 0) {
+            fprintf(stderr, "Grab failed: ");
+            perror("ioctl(ifd, EVIOCGRAB, 1)");
+            exit(1);
+        }
+    }
     int ofd = open("/dev/uinput", O_WRONLY);
     if (ofd == -1) {
         fprintf(stderr, "\"/dev/uinput\": ");
-- 
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