On May 18, 2019 4:08 AM, Solène Rapenne <sol...@perso.pw> wrote: > > Le 2019-05-17 22:47, Edgar Pettijohn a écrit : > > On May 17, 2019 3:14 PM, gwes <g...@oat.com> wrote: > >> > >> > >> > >> On 5/17/19 2:34 PM, Nathan Hartman wrote: > >> > On Fri, May 17, 2019 at 12:28 PM ropers <rop...@gmail.com> wrote: > >> > > >> > > >> > In the history of the (Berkeley) Fast File System, has there ever been > >> > an attempt to implement DOS-like undelete for FFS/UFS? > >> > > >> > Maybe that could work for "normal delete" while making available a > >> > separate > >> > "secure delete" that cannot be un-deleted and furthermore overwrites the > >> > deleted data with random garbage. Administrators could optionally force > >> > the > >> > secure overwrite delete. > >> > > >> I haven't looked at e.g. zfs in a long time. > >> > >> A journal-like system which held the deleted/overwritten files > >> or a system of renaming wouldn't be *that* hard to instantiate > >> There are some problems: > >> (a) denial of service by writing and deleting huge [numbers, size] > >> files. > >> (b) retention policy - under what conditions does the system > >> guarantee existence of backup files? > >> (c) versioning - If I create & delete 'a' six times, how many copies > >> are > >> held. > >> (d) cost of undelete operation - it's not clear how to make > >> that efficient. > >> > >> I'm sure people can find more. > >> > >> A test version substituting a new open(2) and unlink(2) in libc would > >> be > >> easy to make. > >> > >> geoff steckel > >> > > > > I'm thinking something like a trashcan. Where rm(1) actually just > > moves the files to some predetermined location then on shutdown all > > files older than some configureable date are actually unlinked. > > > > Edgar > > you can write a shell script to move given parameters into a special > folder > and make alias rm="that_script" > and a rc script which empty this folder at boot/shutdown. >
Im thinking putting the script in ~/bin/rm may be better long term. Either way just shows there isn't a pressing need to make code changes for what a couple lines of shell scripts can do fairly easily. Edgar
