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On 28/07/2023 18:25, LARONDE Thierry wrote:
> Why in this case not having requested a \filefind primitive, with an
> argument specifying a required extension (an empty string if to be
> taken as is), and using the return value with other primitives (size,
> moddate, md5, dump) doing no search and no extension (very "primitive"
> primitives)?

you are asking on a latex list, but this is not a latex issue.

\pdffilesize has had this behaviour in pdftex for decades, and another
primitive isn't needed.

It does not seem surprising that all the file primitives use the same
logic which is documented for web2c tex in the kpathsea manual section
6.2 so it is not specially documented in the pdftex manual  where each
file primitive searches.

Conversely in prote currently there is the documented difference that
\filesize uses a different handling than \input.  That only needed
documentation as it an unexpected difference.


David


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