Hello. I have noticed the _N_GNU_nonoption_argv_flags_ (where N is the pid of grep) environment variable mentioned in the documentation. I tried to play with it, but it does not seem to work:
bash-5.1$ (declare -x _"$BASHPID"_GNU_nonoption_argv_flags_=1111111 > exec grep -e) grep: option requires an argument -- 'e' Usage: grep [OPTION]... PATTERNS [FILE]... Try 'grep --help' for more information. I have checked gnulib's changelog and it looks like support for it has been removed in 2017, and before that it has not been enabled by default since 2001. (and, as far as I can tell, GNU grep never explicitly enabled it.) Furthermore, this environment variable used to be set this environment variable automatically by bash up to version 2.0, but since version 2.01 (released in 1997) bash has stopped using it. I think, at this point, it would be best to not mention that environment variable in the documentation; it has not been used or even supported for a long time so it is just confusing. Bye. :) emanuele6
