Re: [Libguestfs] [PATCH nbdkit 1/2] file: Add an internal "mode"

On 08/18/22 11:53, Richard W.M. Jones wrote: This doesn't match my experience; for me, bash opens e.g. /tmp just fine on both RHEL7 and Fedora35 -- but it must be a read-only open. $ exec 9</tmp [ok] $ exec 9<>/tmp bash: /tmp: Is a directory The latter is actually expected; it comes from open(). See EISDIR at <https://pubs.opengroup.org/onlinepubs/9699919799/functions/open.html>;. Commit dd28b005430d also adds dfd = open (tmpdir, O_RDONLY | O_DIRECTORY); where I think O_DIRECTORY is not strictly necessary (per spec, because O_CREAT is absent, O_DIRECTORY only helps us refuse a non-directory -- but we do not expect such "attacks" here). So my take is that O_DIRECTORY could be dropped from the C code, at which point a bash redirection (read-only) should work just the same. Laszlo