Hi, Alberto Sentieri wrote: > I tried setfattr as you suggested with "user" and without "user". Both > failed with "Operation not supported" and none of them changed the > timestamp.
This only leaves the idea to mimick the strace of cp -p in an own C program to see whether utimensat() has the desired effect and whether following calls spoil it. Maybe it is necessary to really create a new file and to write some realistic amount of data to it in order to set up the conditions for the problem. The code of cp.c and copy.c in https://sources.debian.org/src/coreutils/8.30-3/src/ looks not overly self-contained. So it might be difficult to get a debuggable version of cp, if not Debian package development magic can produce it. Have a nice day :) Thomas
