Forgot to add the umask wrapper.

makemkv-builder/builder/umask_wrapper.c

@@ -0,0 +1,33 @@
+#define _GNU_SOURCE
+#include <dlfcn.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+
+static void init(void) __attribute__((constructor));
+
+static int (*orig_open)(const char *path, int flags, mode_t mode);
+
+/*
+ * Constructor.
+ *
+ * Save pointer to the original open function.
+ */
+static void init(void) {
+    orig_open = dlsym(RTLD_NEXT, "open");
+}
+
+/*
+ * Wrapper for the open function.
+ *
+ * If we are opening an MKV file, override the mode.
+ */
+int open(const char *path, int flags, mode_t mode) {
+    char *dot = strrchr(path, '.');
+    if (dot && strcmp(dot, ".mkv") == 0) {
+        return orig_open(path, flags, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH);
+    }
+    else {
+        return orig_open(path, flags, mode);
+    }
+}