OK, now that sys_execve() unification has settled down, let's get back
to this one. The real problem is what you are doing with bprm->filename
and bprm->interp; blind use of ->d_name is completely wrong.
For what it's worth, how should it work for e.g. shell scripts? That's
the main user of bprm->{filename,interp}, after all - other places are
either seriously exotic or are just using it for printks.
For shell scripts, however, these guys are really used - we have the original
argv[0] removed and <shell name> <optional argument> <filename> pushed in
its place.
How will it work with execveat()? If we have procfs in place, we can
cook an equivalent pathname (/proc/self/fd/<n>/<relative part of pathname>),
but then why not do just that in userland and be done with that?
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