Remove $FreeBSD$: two-line .h pattern

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/

expr(1): Fix overflow detection when operand is INTMAX_MIN

PR: 227329
Submitted by: Tobias Stoeckmann <tobias AT stoeckmann.org>

Merge sync of head

Merge from HEAD

Merging ^/head r277777 through r277803.

Fix overflow check for multiplication:
- Add special test to detect the case of -1 * INTMAX_MIN
- Protect against elimination of the test division by the optimizer

Garrett Cooper noticed that the ov

Fix overflow check for multiplication:
- Add special test to detect the case of -1 * INTMAX_MIN
- Protect against elimination of the test division by the optimizer

Garrett Cooper noticed that the overflow checks were incomplete, and Bruce
Evans suggested the use of the "volatile" qualifier to counter the effect
of the undefined behaviour, when the prior multiplication caused overflow,
and he also suggested improvements to the comments.

Reviewed by: bde
MFC after: 1 week

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IFC @ r238370

IFC @ r236291.
Diff reductions to the enclosure driver made in r235911.

Merge head r233826 through r236168.

Remove redundant declaration of yyparse

Reported by: tinderbox

MFC

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

Merge head r232686 through r233825 into projects/pf/head.

rm[0].rm_so must be zero (an explicit check is made for zero in the
outer if condition)

Reviewed by: se
Approved by: cperciva

IFC @ r224187

Integrate from Head into ZFSD feature branch as of revision r224141.

Fix style, since this file has just been touched in a major way.
No actual code changes.

Some refactoring for easier maintenance of the code. This is a follow-up
to re-establishment of 64bit arithmetic, but is committed separately, to
not obscure that conversion. This commit does not cha

Some refactoring for easier maintenance of the code. This is a follow-up
to re-establishment of 64bit arithmetic, but is committed separately, to
not obscure that conversion. This commit does not change the observed
behaviour of expr in any way. Style will be fixed in a follow-up commit.

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Make /bin/expr support 64bit numeric range and range checks by default,
again. This brings back the behaviour of expr in FreeBSD-4, which had been
reverted due to an assumed incompatbility with POSIX

Make /bin/expr support 64bit numeric range and range checks by default,
again. This brings back the behaviour of expr in FreeBSD-4, which had been
reverted due to an assumed incompatbility with POSIX.1 for FreeBSD-5.

This issue has been discussed in the freebsd-standards list, and the
consensus was, that POSIX.1 is in fact not violated by this extension,
since it affects only cases of POSIX undefined behaviour (overflow of
signed long).

Other operating systems did upgrade their versions of expr to support
64bit range, after it had been initially brought to FreeBSD. They have
used it for a decade without problems, meanwhile.

The -e option is retained, but it will only select less strict checking
of numeric parameters (leading white-space, leading "+" are allowed and
skipped, an empty string is considered to represent 0 in numeric context.)
The call of check_utility_compat() as a means of establishing backwards
compatibility with FreeBSD-4 is considered obsolete, but preserved in
this commit. It is expected to be removed in a later revision of this
file.
Reviewed by: bde, das, jilles
MFC after: 2 month (those parts that do not violate POLA)

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Correct typos containing my login name (plus one more in expr.y).
Found courtesy of a recursive grep in the wrong directory.

/*- or .\"- or #- to begin license clauses.

Create a small library function, check_utility_compat(3), to determine
whether a named utility should behave in FreeBSD 4.x-compatible mode
or in a standard mode (default standard). The configuratio

Create a small library function, check_utility_compat(3), to determine
whether a named utility should behave in FreeBSD 4.x-compatible mode
or in a standard mode (default standard). The configuration is done
malloc(3)-style, with either an environment variable or a symlink.

Update expr(1) to use this new interface.

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EXPR_COMPAT should imply -e, since there is no way to specify it otherwise,
and -e reflects the historic behavior of FreeBSD's expr.

The response to my POSIX interpretation request says that `expr'
is required to be oblivious to overflow and to use the data type `long'.
(Division by zero is undefined in ISO C so it's still OK to c

The response to my POSIX interpretation request says that `expr'
is required to be oblivious to overflow and to use the data type `long'.
(Division by zero is undefined in ISO C so it's still OK to check for it
here.) Add a new `-e' flag to get the old, more useful behavior.

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Provide an environment variabloe, EXPR_COMPAT, which disables option
parsing for compatibility with old implementations.