read() on dir

[Christoph Kukulies]

Argh! I was wrong.

$ cat /tmp
cat: /tmp: Is a directory


Sorry for the noise.


> Am 17.03.2021 um 16:19 schrieb Christoph Kukulies <kuku at kukulies.org>:
> 
> There was some discussion in the FreeBSD mailing list about changing the behaviour of a directory fd WRT
> the read() function. A change has been made towards disallowing this from FreeBSD 12.2 onwards (IIRC) and there was big discussion on this since it
> „violates“ the cleanness of UNIX, that a file is a file is a file or „everything is a file“. Many purists were against the disallowing behaviour.
> 
> At that time I cross checked whether this is allowed in macOS and - again IIRC - at that time (Catalina) it was disallowed either to do
> a „vi .“:
> 
> $ vi /tmp
> 
> " ============================================================================
> " Netrw Directory Listing                                        (netrw v168)
> "   /tmp
> "   Sorted by      name
> "   Sort sequence: [\/]$,\<core\%(\.\d\+\)\=\>,\.h$,\.c$,\.cpp$,\~\=\*$,*,\.o$,\.obj$,\.info$,\.swp$,\.bak$,\~$
> "   Quick Help: <F1>:help  -:go up dir  D:delete  R:rename  s:sort-by  x:special
> " ==============================================================================
> ../                                                                                                                            
> ./
> .vbox-kuku-ipc/
> com.apple.launchd.AUnEPqi6tC/
> com.apple.launchd.atGF3BeR4X/
> com.apple.launchd.lOdpt02m8q/
> powerlog/
> FirstBootAfterUpdate
> FirstBootCleanupHandled
> OSL_PIPE_501_SingleOfficeIPC_57c1e9acbaf815f47e314f3cbee8d6=
> fseventsd-uuid
> 
> Now I’m surprised that this is possible (again?) under BigSur. I may be totally wrong on this. I don’t have the
> opportunity to cross check that against Catalina. Could someone confirm or proove the opposite?
> 
> —
> Christoph 
> a UNIX dinosaur
> 
> 
> 
> 
> 

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