On Mon, 12 Jan 2026 at 06:26, <[email protected]> wrote: > On Sun, Jan 11, 2026, at 6:24 PM, Paul Eggert wrote: > > "ed" doesn't do that. It treats directories just like regular file > Weren't directories readable in the old (e.g. version 6 or 7 Bell Labs Unix) > days ... one could see the directory entries with their binary encoded inode > numbers and directory entry names using plain open(2) and read(2) system > calls, right?
Yes. A quick look on the GCC Compile Farm shows this is still true on NetBSD with the FFS and MSDOS filesystems (but pseudo filesystems tmpfs, kernfs, ptyfs and procfs fail "Is a directory") and on AIX with all the FS I could find (JFS2, procfs and ahafs, another pseudo). M
