Feat: Add tmpfile spoofer for redirecting decrypted license file

src/spoof/spoofer.c

@@ -2,6 +2,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <dlfcn.h>
+#include <unistd.h>
 
 static FILE *(*real_fopen)(const char *path, const char *mode) = NULL;
 
@@ -38,3 +39,19 @@ FILE *fopen(const char *path, const char *mode) {
 
     return real_fopen(path, mode);
 }
+
+FILE *tmpfile(void) {
+    char path[] = "./tmpfile_XXXXXX";
+    int fd = mkstemp(path);
+    if (fd == -1) {
+        fprintf(stderr, "proc_redirect: mkstemp failed\n");
+        abort();
+    }
+    fprintf(stderr, "proc_redirect: tmpfile created at %s\n", path);
+    FILE *f = fdopen(fd, "w+");
+    if (!f) {
+        close(fd);
+        abort();
+    }
+    return f;
+}