Interesting script. I'll dig through it a bit later on this evening. As per your concerns, if a file were removed it would not cause a reboot. Instead, the open would fail and it would try the next file. I will be adding a test to ensure that it is a file, but even in the case that it is a directory, the sysread will return EISDIR instead of EIO and would just sleep for 15 seconds and try the next file.