On Wed, Jan 20, 2021 at 10:49:08AM +0100, steve wrote: > Thanks Mike and Thomas for the answers. > > Le 20-01-2021, à 10:15:09 +0100, to...@tuxteam.de a écrit : > > >On Wed, Jan 20, 2021 at 09:40:46AM +0100, steve wrote: > >>Question. What does the following mean? > >> > >># find /dev -follow -printf "" > >>find: '/dev/fd/4': No such file or directory > > > >This is funny. At first I thought I could reproduce it by tricking `find' > >into following a broken symlink, but with a "static" setup I couldn't. > > > >Still, /dev/fd is bound to be highly dynamic: it's a link to /proc/self/fd, > >i.e. a view on the current process's open file descriptors. It's quite > >probable that `find' checks some directory entry, and at the time it tries > >to do something with it, it has disappeared, leading to that error > >message. > > What is strange is that it is always /dev/fd/4 that is missing, even > after a reboot.
As I said -- this is the own process's set of open file descriptors. This process in this case is the one running `find' itself. At the point it is looking for that /proc/fd/4, it is bound to be in some semi-deterministic state. It's dancing a strange ballet with itself. I'm sure one could find out exactly what's going on given enough patience :-) Cheers - t
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