Minor style knit.

printf(1): warn about incomplete uses n$

Reviewed by: jilles
Obtained from: Illumos
MFC after: 2 weeks

IFC @266473

printf: Fix missing arguments for %u/%o/%x/%X after r265592.

If a numeric argument is missing, zero should be assumed, for signed as well
as unsigned conversions.

This fixes the 'zero' regression t

printf: Fix missing arguments for %u/%o/%x/%X after r265592.

If a numeric argument is missing, zero should be assumed, for signed as well
as unsigned conversions.

This fixes the 'zero' regression tests.

r265592 erroneously reverted r244407.

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printf: fix regression after illumos merges.

The "bltin/bltin.h" wrappers do not support exit() and attempting
to call it will exit sh completely.

Note that errx() is acceptable but will always ret

printf: fix regression after illumos merges.

The "bltin/bltin.h" wrappers do not support exit() and attempting
to call it will exit sh completely.

Note that errx() is acceptable but will always return with status 2.

Reported by: jilles (and the testing framework)
Fix by: jilles
Pointyhat: pfg

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prinf: replace use of alloca with variable length array.

Use of alloca(3) is discouraged in FreeBSD. Using a VLA
is simple and should be more portable.

Requested by: jilles

Merge from head

Fix the incorrect handling of %b and \c in printf(1)

This is required for POSIX compliance.

Obtained from: Garrett D'Amore (Illumos)
MFC after: 4 days

Add width and precision specifiers to printf(1) %n$.

This actually completes r264743 so that width and precision
specifiers work properly with %n$. These keeps consistency
with ksh93 and zsh.

Requ

Add width and precision specifiers to printf(1) %n$.

This actually completes r264743 so that width and precision
specifiers work properly with %n$. These keeps consistency
with ksh93 and zsh.

Requested by: jilles
Obtained from: Garrett D'Amore (Illumos)
MFC after: 4 days

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Merge head

IFC @264767

Add parameterized position handling to printf(1).

Add a new %n$ option to change the order of the parameters as
done in the ksh93 builtin printf (among others).

For example:
%printf '%2$1d %1$s\n'

Add parameterized position handling to printf(1).

Add a new %n$ option to change the order of the parameters as
done in the ksh93 builtin printf (among others).

For example:
%printf '%2$1d %1$s\n' one 2 three 4
2 one
4 three

The feature was written by Garret D'Amore under a
BSD license for Nexenta/illumos.

Reference:
http://garrett.damore.org/2010/10/new-implementation-of-printf.html

PR: bin/152934
Obtained from: Illumos
MFC after: 2 weeks

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Minor style(9) cleanups

#define should be followed by a tab.

MFC after: 3 days

Merge fresh head.

IFC @247348.

Sync with HEAD.

IFC @ r244983.

POSIX requires that non-existent or null arguments be treated as if a
zero argument were supplied.

Add a regression test to catch this case as well.

PR: bin/174521
Submitted by: Daniel Shahaf <dan

POSIX requires that non-existent or null arguments be treated as if a
zero argument were supplied.

Add a regression test to catch this case as well.

PR: bin/174521
Submitted by: Daniel Shahaf <danielsh@elego.de> (pr)
Submitted by: Mark Johnston <markjdb@gmail.com> (initial patch)
Reviewed by: jilles
Approved by: cperciva (implicit)
MFC after: 3 weeks

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MFC @ r241285

IFC @ r242684

Sync from head

sh: Prefer internal nextopt() to libc getopt().

This reduces code duplication and code size.

/usr/bin/printf is not affected.

Side effect: different error messages when certain builtins are passed

sh: Prefer internal nextopt() to libc getopt().

This reduces code duplication and code size.

/usr/bin/printf is not affected.

Side effect: different error messages when certain builtins are passed
invalid options.

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IFC @ r234692

sys/amd64/include/cpufunc.h
sys/amd64/include/fpu.h
sys/amd64/amd64/fpu.c
sys/amd64/vmm/vmm.c

- Add API to allow vmm FPU state init/save/restore.

FP stuff discussed with: kib

IFC @230489 (pending review).

Style cleanups for printf.

PR: bin/152934
Approved by: jhb (mentor)
Obtained from: Illumos
MFC after: 2 weeks