use the libc functions for converting between multibyte strings and wide
strings in here any more, besides mksh has slightly different needs than
SUSv3 compliance ⇒ hand-craft optimised and unrolled functions for that
• sync the mksh-internal wcwidth function with libc
‣ only if !MKSH_SMALL
‣ add appropriate regression test
• if FPOSIX is set, do not close fds > 2 on exec, Debian #499139
• add appropriate regression tests for keeping fds private or not
developers, I understand about 1% of the source code only) yet still
functional (just not en par with the emacs editing mode, but no known
regressions over oksh (in -current) and better functionality than most
other korn shells, according to Yofuh)
plug a memleak when freeing io redirection in commands.
the leaked memory is actually reclaimed when the command
finishes but may grow until that happens, e.g. during
command execution.
ok phessler@.
testing sobrado@ jmc@ oga@.
• fix vi mode (which, however, is officially orphaned) multi-line $PS1 by
using a similar algorithm for prompt skipping as emacs mode (changing
the meaning of prompt_trunc variable and using prompt_redraw, just even
more efficiently than vi mode); reported by asarch via IRC
• fix multi-line prompts if last line is “too large” by using emacs mode
algorithm of just internally appending a newline, while here ☺ this even
saves us having to re-add the prompt_skip variable…
WARNING: this is only barely tested, as almost nobody ever uses vi mode
⇒ test yourself, there may be bugs (e.g. off-by-ones); already known is
that the vi input line editing mode is NOT multibyte safe…
removes the \n part of a “\\\n” sequence, but not the backslash ⇒ we can’t
use line continuation in a here document
someone might want to add this to *(autoconf) Portable Shell::
in the MKSH_SMALL case… so the speed, code size, and number of insns
is the same as before for that, except that the NULL pointer check is
moved to possibly save a function call, and that the function call may
be inlined or jumped
• others: fix 6 (!) cases of non-constant or side-effect arguments
to the str_save() or str_nsave() macros, and other abuse of them
• also fix some cosmetics and other un-nice code while here
missing for a while yet its disappearance was unnoticed because…
• distrib/special/mksh/Makefile: sync check categories, this was missed
• mksh.hts: sync clog
tg