Re: Is this correct?

Is your filesystem case-sensitive? It seems you're using macOS, at which 
point the case in pathnames won't matter and all pathname variants you 
listed are correct.

W dniu 2026-02-20 17:35, Marco Antoniotti napisał(a):

> Hi
> 
> That does not matter.  It is the case of the results that is off.
> 
> On LW this is what you have:
> 
> CL-USER 10 > (describe *default-pathname-defaults*)
> 
> #P"" is a PATHNAME
> HOST           NIL
> DEVICE         NIL
> DIRECTORY      NIL
> NAME           NIL
> TYPE           NIL
> 
> VERSION        :NEWEST
> 
> and
> 
> CL-USER 12 > (describe (lw:current-pathname))
> 
> #P"/Users/marcoxa/Projects/Lang/CL/HELambdaP/" is a PATHNAME
> HOST           NIL
> DEVICE         NIL
> DIRECTORY      (:ABSOLUTE "Users" "marcoxa" "Projects" "Lang" "CL" 
> "HELambdaP")
> NAME           NIL
> TYPE           NIL
> VERSION        NIL
> 
> On SBCL you have.
> 
> CL-USER> (describe *default-pathname-defaults*)
> #P"/Users/marcoxa/Projects/Lang/CL/HELambdaP/"
> [pathname]
> 
> HOST       = #<SB-IMPL::UNIX-HOST {1200039983}>
> DIRECTORY  = (:ABSOLUTE "Users" "marcoxa" "Projects" "Lang" "CL" 
> "HELambdaP")
> 
> But even binding *d-p-d* on LWM does not change the effect.
> 
> CL-USER 11 > (let ((*default-pathname-defaults* (current-pathname)))
> (load "tmp/lpn.lisp")
> (load "tmp/Lpn.lisp")
> (load "tmp/LPN.lisp"))
> ; Loading text file 
> /Users/marcoxa/Projects/Lang/CL/HELambdaP/tmp/lpn.lisp
> LPN: Test: *load-pathname* 
> #P"/Users/marcoxa/Projects/Lang/CL/HELambdaP/tmp/lpn.lisp"
> LPN: Test: *load-truename* 
> #P"/Users/marcoxa/Projects/Lang/CL/HELambdaP/tmp/lpn.lisp"
> ; Loading text file 
> /Users/marcoxa/Projects/Lang/CL/HELambdaP/tmp/Lpn.lisp
> LPN: Test: *load-pathname* 
> #P"/Users/marcoxa/Projects/Lang/CL/HELambdaP/tmp/Lpn.lisp"
> LPN: Test: *load-truename* 
> #P"/Users/marcoxa/Projects/Lang/CL/HELambdaP/tmp/Lpn.lisp"
> ; Loading text file 
> /Users/marcoxa/Projects/Lang/CL/HELambdaP/tmp/LPN.lisp
> LPN: Test: *load-pathname* 
> #P"/Users/marcoxa/Projects/Lang/CL/HELambdaP/tmp/LPN.lisp"
> LPN: Test: *load-truename* 
> #P"/Users/marcoxa/Projects/Lang/CL/HELambdaP/tmp/LPN.lisp"
> _#P"/Users/marcoxa/Projects/Lang/CL/HELambdaP/tmp/LPN.lisp"_
> 
> Shall I move to TOPS-20? 🥹🫩🙄
> 
> Cheers
> 
> Marco
> 
> On Fri, Feb 20, 2026 at 5:25 PM Michał "phoe" Herda <[email protected]> 
> wrote:
> 
> What is *DEFAULT-PATHNAME-DEFAULTS* on LW and SBCL? 
> https://www.lispworks.com/documentation/HyperSpec/Body/v_defaul.htm
> 
> Asking because that is going to affect the value of LOAD-PATHNAME, as 
> per https://www.lispworks.com/documentation/HyperSpec/Body/v_ld_pns.htm
> 
> Both are correct, I just suspect that the implementation-defined 
> default is different.
> 
> W dniu 2026-02-20 17:12, Marco Antoniotti (as marco dot antoniotti at 
> unimib dot it) napisał(a):
> 
> Hi
> 
> I am finding some issues with *load-pathname* and *load-truename*.
> 
> Here is what I see in LWM (8.x).  I did a change-directory beforehand).
> 
> CL-USER 5 > (load "tmp/lpn.lisp")
> ; Loading text file 
> /Users/marcoxa/Projects/Lang/CL/HELambdaP/tmp/lpn.lisp
> LPN: Test: *load-pathname* #P"tmp/lpn.lisp"
> LPN: Test: *load-truename* 
> #P"/Users/marcoxa/Projects/Lang/CL/HELambdaP/tmp/lpn.lisp"
> #P"/Users/marcoxa/Projects/Lang/CL/HELambdaP/tmp/lpn.lisp"
> 
> CL-USER 6 > (load "tmp/Lpn.lisp")
> ; Loading text file 
> /Users/marcoxa/Projects/Lang/CL/HELambdaP/tmp/Lpn.lisp
> LPN: Test: *load-pathname* #P"tmp/Lpn.lisp"
> LPN: Test: *load-truename* 
> #P"/Users/marcoxa/Projects/Lang/CL/HELambdaP/tmp/Lpn.lisp"
> #P"/Users/marcoxa/Projects/Lang/CL/HELambdaP/tmp/Lpn.lisp"
> 
> CL-USER 7 > (load "tmp/LPN.lisp")
> ; Loading text file 
> /Users/marcoxa/Projects/Lang/CL/HELambdaP/tmp/LPN.lisp
> LPN: Test: *load-pathname* #P"tmp/LPN.lisp"
> LPN: Test: *load-truename* 
> #P"/Users/marcoxa/Projects/Lang/CL/HELambdaP/tmp/LPN.lisp"
> #P"/Users/marcoxa/Projects/Lang/CL/HELambdaP/tmp/LPN.lisp"
> 
> However, SCBL seems to be "more correct".
> 
> CL-USER> (load "tmp/lpn.lisp")
> LPN: Test: *load-pathname* 
> #P"/Users/marcoxa/Projects/Lang/CL/HELambdaP/tmp/lpn.lisp"
> LPN: Test: *load-truename* 
> #P"/Users/marcoxa/Projects/Lang/CL/HELambdaP/tmp/lpn.lisp"
> T
> CL-USER> (load "tmp/Lpn.lisp")
> LPN: Test: *load-pathname* 
> #P"/Users/marcoxa/Projects/Lang/CL/HELambdaP/tmp/Lpn.lisp"
> LPN: Test: *load-truename* 
> #P"/Users/marcoxa/Projects/Lang/CL/HELambdaP/tmp/lpn.lisp"
> T
> CL-USER> (load "tmp/LPN.lisp")
> LPN: Test: *load-pathname* 
> #P"/Users/marcoxa/Projects/Lang/CL/HELambdaP/tmp/LPN.lisp"
> LPN: Test: *load-truename* 
> #P"/Users/marcoxa/Projects/Lang/CL/HELambdaP/tmp/lpn.lisp"
> T
> 
> The actual file is tmp/lpn.lisp and it is listed below.
> 
> (format t "LPN: Test: *load-pathname* ~S~%" *load-pathname*)
> (format t "LPN: Test: *load-truename* ~S~%" *load-truename*)
> 
> Any thoughts?
> 
> Marco
> --
> 
> Marco Antoniotti, Professor, Director         tel. +39 - 02 64 48 79 01
> DISCo, University of Milan-Bicocca U14 2043   
> http://dcb.disco.unimib.it
> Viale Sarca 336
> I-20126 Milan (MI) ITALY
> 
> REGAINS: https://regains.disco.unimib.it/

-- 

Marco Antoniotti, Professor, Director         tel. +39 - 02 64 48 79 01
DISCo, University of Milan-Bicocca U14 2043   http://dcb.disco.unimib.it
Viale Sarca 336
I-20126 Milan (MI) ITALY

  REGAINS: https://regains.disco.unimib.it/