On 2025-08-23 11:46, Phillip Lougher wrote:
As far as Squashfs is concerned SEEK_HOLE/SEEK_DATA is easy to implement. So I'll think about adding it as a build option.
Thanks, that'll be helpful.
But this isn't going to fix it for any other case.
Right, and bleeding-edge coreutils already has a (slowish) workaround for Squashfs as-is, as well as for other file systems that don't expose extents to user code. If I get around to it I will install similar workarounds in other user code I help maintain.
