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H A Dldconfig.cdiff 3ede04c78c7c726ed79a39d22c65a58d0ecc5d00 Fri Nov 19 05:07:58 CET 2021 Konstantin Belousov <kib@FreeBSD.org> ldconfig(8): check for no-args command line after options are parsed

Default action for ldconfig is specified as -R AKA 'append', and for
no-args (without options changing default actions), ldconfig should
append empty list of directories to current list. But because the check
was done before options were parsed out, presence of any option turned
off default rescan.

As result, innocently-looked commands like `ldconfig -v' were interpreted
as setting directory hints list to one specified on the command line,
i.e. empty.

Reported by: https://github.com/mesonbuild/meson/issues/9592
Reviewed by: emaste
Tested by: jbeich
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D33058