2 Aug
2023
2 Aug
'23
2:40 a.m.
Dave Horsfall <dave(a)horsfall.org> wrote:
Not quite a Shell escape but possibly just as
dangerous: EX/VI had/has the
ability to embed EX commands within a file to be run when opened e.g. "se
ts=4 sw=4" etc; no doubt EMACS has the same "feature".
It would also recognise the EXINIT environment variable.
-- Dave
These are called "modelines". In modern vim they have to be in the
first 4 or last 4 lines of a file (or so) and vim is careful about
what it will run from a modeline.
I *think* other vi versions have an option to enable modelines in
the .exrc file, which is off by default, but I no longer remember
the details.
Arnold