On 9/25/21 8:55 PM, enh via Toybox wrote: > These are 2 hex digits each with a ':' between them in the kernel. Major has been 12 bits and minor 20 bits since 2003. (Git annotate on the header says https://github.com/mpe/linux-fullhistory/commit/7ae6a13832a2 .) So xxx:xxxxx, which is why I used a 10 byte buffer. Rob