REQ: built the drop_caches into the tool

[pepa65]

After most operations, I need to do echo 2 >/proc/sys/vm/drop_caches otherwise filesystem operations are misleading/incorrect. Can't this operation just be built in? I can't think why people would not want to do this when they're using this (except debugging perhaps?)

[pepa65]

I hacked it in by inserting the line system("echo 2 >/proc/sys/vm/drop_caches"); AFTER close(dirfd); in the functions container_attach and container_detach in src/container.c but surely there is a more proper way to do this..?