[luatex] \openin does not find files with no extension

Hans Hagen j.hagen at xs4all.nl
Sat Jul 27 21:49:54 CEST 2019

On 7/27/2019 7:23 PM, Ulrike Fischer wrote:

> yes, the luatex syntax has been extended here (which is fine). That
> pdftex doesn't know this syntax is documented and not a problem.
Yes but the same 'add suffix when not set' code is used as in pdftex, 
but luatex did that only in then non-braced case (whjich pdftex doesn't 
have) while actually checking with a .tex suffix when not found is a 
kpse feature controlled by some flags in the cnf so even for pdftex one 
can wonder what is the right way (support for {} shouldn't be too hard 
for pdftex). Keep in mind that adding a .tex in case of no suffix being 
there makes it impossible to open files without suffix.


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