Exit if file doesn't exist

main/postmarketos-android-recovery-installer/disable-warning.c

@@ -92,14 +92,16 @@ int main()
 
     sleep(4);
 
-    orsin = fopen("/sbin/orsin", "w");
+    if ((orsin = fopen("/sbin/orsin", "w")) == NULL)
+        return 1;
     fputs("set tw_backup_system_size 999", orsin);
     fclose(orsin);
 
     // Have to read FIFO file, because it blocks
     // the thread processing the command
     // (see man 3 mkfifo)
-    orsout = fopen("/sbin/orsout", "r");
+    if ((orsout = fopen("/sbin/orsout", "r")) == NULL)
+        return 1;
     fgets(buf, 256, orsout);
     fclose(orsout);