Le jeu. 10 avr. 2025 à 18:29, Laurent Lyaudet <laurent.lyau...@gmail.com> a écrit :
> Hello :), > > Recently, I noticed during tests that mkdir -p can handle paths beyond > PATH_MAX that is currently 4096. > But cd cannot do this. > You have to split your cd commands to go to the farthest directory. > > I think that cd cannot move if it fails. > In case of error, it must keep bash in the same current directory. > Maybe I'm wrong. > > But if I'm wrong and that is not a requirement, > then splitting the path before recursive calls of one level depth cd would > make cd as resilient as mkdir -p. > If I'm not wrong, we need to handle some kind of backtracking in cd. > I hope this is something that can be done. > I will not argue further if it's not accepted here. > > ***Below greetings is some sample script to demonstrate/reproduce the > "bug/more resilient feature request"*** > (For reference, here is where this problem comes out: > > https://discourse.ubuntu.com/t/increasing-path-max-to-8092-and-name-max-to-512/58748/20?u=laurent-lyaudet > ) > > Best regards, > Laurent Lyaudet > > #!/bin/bash > > # base 16, each lines count for 64, 64*64=4096 > mkdir -p 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > another_too_long_string_to_certainly_be_over_4096 > echo "" > echo "" > echo "mkdir -p works above 4096" > echo "" > echo "" > cd 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > another_too_long_string_to_certainly_be_over_4096 || (\ > echo "" &&\ > echo "" &&\ > echo "cd fails above 4096" &&\ > echo "" &&\ > echo "") > cd 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/ > echo "" > echo "" > echo "1) split cd works for 2048" > echo "" > echo "" > cd 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/\ > 0123456789012345/0123456789012345/0123456789012345/0123456789012345/ > echo "" > echo "" > echo "2) split cd works for 2048" > echo "" > echo "" > cd another_too_long_string_to_certainly_be_over_4096 > echo "" > echo "" > echo "3) split cd works for the last directory above 4096" > echo "" > echo "" > > > Sorry, I forgot to say that I already know there is also another upper limit to a command line length. But it is less relevant to this problem.
