0c94277ccb
and vendor pdksh versions, re-introduce FPOSIX alongside FSH. The semantics are now: ‣ set -o posix ⇒ • disable brace expansion and FSH when triggered • use Debian Policy 10.4 compliant non-XSI “echo” builtin • do not keep file descriptors > 2 to ksh ‣ set -o sh ⇒ • set automatically #ifdef MKSH_BINSHREDUCED • disable brace expansion and FPOSIX when triggered • use Debian Policy 10.4 compliant non-XSI “echo” builtin • do not keep file descriptors > 2 to ksh • trigger MKSH_MIDNIGHTBSD01ASH_COMPAT mode if compiled in • make “set -- $(getopt ab:c "$@")” construct work Note that the set/getopt one used to behave POSIXly only with FSH or FPOSIX (depending on the mksh version) set and Bourne-ish with it not set, so this changes default mksh behaviour to POSIX!