PR bin/50834o: fix expansions of (unquoted) ${unset_var-} and ""$@ (from kre)

remove useless casts

PR bin/43469 - correctly handle quoting of the pattern part of ${var%pat}
type expansions. (from kre)

PR/50179: Timo Buhrmester: sh(1) variable expansion bug

Use an explicit body for a "until not EINTR" loop.

Add wctype(3) support to Shell Patterns.
Obtained from FreeBSD.

Fix PR bin/48202 [non-critical/low]:
sh +nounset and `for X; do` iteration fails if parameter set empty
by applying and testing FreeBSD's patch of Oct 24 2009 for this; see
http://svnweb.freebsd.

Fix PR bin/48202 [non-critical/low]:
sh +nounset and `for X; do` iteration fails if parameter set empty
by applying and testing FreeBSD's patch of Oct 24 2009 for this; see
http://svnweb.freebsd.org/base/head/bin/sh/expand.c?r1=198453&r2=198454
Also created an ATF test in tests/bin/sh/t_expand.sh for this error and
corrected a space->tabs problem there as well.

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add crude $LINENO support for FreeBSD

Fix the expansion of "$(foo-$bar}" so that IFS isn't applied when
expanding $bar.
Noted by Greg Troxel on tech-userlevel running some 'git' tests.
Should fix PR bin/47361

include <limits.h> for CHAR_MIN/CHAR_MAX

NULL does not need a cast

PR/45269: Andreas Gustafsson: Instead of falling off the edge when eating trailing newlines
if the block has moved, arrange so that trailing newlines are never placed in the string
in the first place

PR/45269: Andreas Gustafsson: Instead of falling off the edge when eating trailing newlines
if the block has moved, arrange so that trailing newlines are never placed in the string
in the first place, by accumulating them and adding them only after we've encountered a
non-newline character. This allows also for more efficient appending since we know how much
we need beforehand. From FreeBSD.

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PR/45069: Henning Petersen: Use prototypes from builtins.h .

Use %zu in printf format for size_t value.

fix -Wsign-compare issues

use EXP_CASE only when trimming and unquoted.

PR/36954: Roland Illig: don't eat backlash escapes in variable patterns.
Makes ${line%%\**} work.

The field width passed for a %.*s printf format is supposed to be int, not
ptrdiff_t; on 64-bit platforms the latter will be too wide.
Adjust accordingly.

Make /bin/sh use intmax_t (instead of int) for arithmetic in $((...)).

s/apparant/apparent/, from Zafer.

Set the 'not a parameter' flag when we skip initial whitespace.
Otherwise:
./sh -c 'x=" "; for a in $x; do echo a${a}a; done'
is processed as a single empty parameter (instead of no parameters).

Set the 'not a parameter' flag when we skip initial whitespace.
Otherwise:
./sh -c 'x=" "; for a in $x; do echo a${a}a; done'
is processed as a single empty parameter (instead of no parameters).
Should fix the breakage I introdiced in rev 1.75 and PR/34256 and PR/34254

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Rework the code changes from revisions 1.69, 1.70 and 1.74 so that the code
behaves correctly.
As far as I can tell, "x$@y" now expands correctly, as does IFS=:; set -$IFS.
Fixes PR/33472 (again) and

Rework the code changes from revisions 1.69, 1.70 and 1.74 so that the code
behaves correctly.
As far as I can tell, "x$@y" now expands correctly, as does IFS=:; set -$IFS.
Fixes PR/33472 (again) and PR/33956

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When expanding "$@" add a \0 byte after the last argument (as well as all
the earlier ones) so that a separator is added before it when it is empty.
This wasn't needed before a recent change that che

When expanding "$@" add a \0 byte after the last argument (as well as all
the earlier ones) so that a separator is added before it when it is empty.
This wasn't needed before a recent change that chenged the behaviour of
trailing whitespace IFS characters.
Fixed PR/33472

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Coverity CID 620: Remove dead code.

TOG require that 'set +o' output the options in a form suitable for
restoring them - make it so.