Is it possible to watch for file (content) changes based on its hash

[tukusejssirs]

I’ve just wanted to watch /proc/acpi/button/lid/LID/state file (it changes its content when a laptop lid is opened/closed) on Linux using chokidar, but it failed to watch for changes in it, as (for some reason; I didn’t bother to find the reason) doesn’t changes its stats (atime/mtime/ctimeare all same from a few hours ago andbtimeis not defined instatprogram and thus infs.statit is set to0` in UNIX epoch). I presume it is open for writing in the kernel.

The only way I could watch for changes is using md5sum.

IMO it would be nice if chokidar would support watching file changes based on the hash.