Use the __result_use_check attribute also for reallocf(3).

The GCC attribute causes a warning to be emitted if a caller of the
function with this attribute does not use its return value. Unlike the

Use the __result_use_check attribute also for reallocf(3).

The GCC attribute causes a warning to be emitted if a caller of the
function with this attribute does not use its return value. Unlike the
traditional realloc, with reallocf(3) we don't have to check for NULL
values but we still have to make sure the result is used.

MFC after: 3 days

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Merge ^/head r326936 through r327149.

Introduce the daemonfd function.

The daemonfd function is equivalent to the daemon(3) function expect that
arguments are descriptors. For example dhclient(8) which is sandboxed is
unable to open /de

Introduce the daemonfd function.

The daemonfd function is equivalent to the daemon(3) function expect that
arguments are descriptors. For example dhclient(8) which is sandboxed is
unable to open /dev/null to close stdio instead it's allows to fail
daemon(3) function to close the descriptors and then do it explicit in code.
Instead of such hacks we can use now daemonfd.

This API can be also helpful to migrate system to platforms like CheriBSD.

Reviewed by: brooks@, bcr@, jilles@ (earlier version)
Differential Revision: https://reviews.freebsd.org/D13433

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Merge ^/head r325999 through r326131.

Remove lint support from system headers and MD x86 headers.

Reviewed by: dim, jhb
Discussed with: imp
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D13156

include: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier

include: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.

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Vendor import of libc++ trunk r303197:
https://llvm.org/svn/llvm-project/libcxx/trunk@303197

Implement the memset_s(3) function as specified by the C11 ISO/IEC
9899:2011 Appendix K 3.7.4.1.

Other needed supporting types, defines and constraint_handler
infrastructure is added as specified in

Implement the memset_s(3) function as specified by the C11 ISO/IEC
9899:2011 Appendix K 3.7.4.1.

Other needed supporting types, defines and constraint_handler
infrastructure is added as specified in the C11 spec.

Submitted by: Tom Rix <trix@juniper.net>
Sponsored by: Juniper Networks
Discussed with: ed
MFC after: 3 weeks
Differential revision: https://reviews.freebsd.org/D9903
Differential revision: https://reviews.freebsd.org/D10161

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Merge ^/head r313644 through r313895.

Remove outdated claim.

Despite wishful thinking the removal of these old function hasn't
happened yet.

MFC after: 3 days

MFhead@r313243

Merge ^/head r312894 through r312967.

Make use of clang nullability attributes.

Replace uses of the GCC __nonnull__ attribute with the clang nullability
qualifiers. The replacement should be transparent for clang developers as
the new q

Make use of clang nullability attributes.

Replace uses of the GCC __nonnull__ attribute with the clang nullability
qualifiers. The replacement should be transparent for clang developers as
the new qualifiers will produce the same warnings and will be useful for
static checkers but will not cause aggressive optimizations.

GCC will not produce such warnings and developers will have to use
upgraded GCC ports built with the system headers from r312538.

Hinted by: Apple's Libc-1158.20.4, Bionic libc
MFC after: 11.1 Release

Differential Revision: https://reviews.freebsd.org/D9004

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Remove some uses of the GCC __nonnull() attribute.

While the checks are considered useful, the attribute does dangerous
optimizations, removing NULL checks where they can be needed. Remove the
uses

Remove some uses of the GCC __nonnull() attribute.

While the checks are considered useful, the attribute does dangerous
optimizations, removing NULL checks where they can be needed. Remove the
uses of this attribute introduced in r281130: the changes were inspired on
Google's bionic where this attribute is not used anymore.

The __nonnull() attribute will be deprecrated from our headers and
replaced with the Clang _Nonnull qualifier in the future.

MFC after: 3 days

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Merge ^/head r306412 through r306905.

Remove setkey(), encrypt(), des_setkey() and des_cipher().

The setkey() and encrypt() functions are part of XSI, not the POSIX base
definitions. There is no strict requirement for us to provide thes

Remove setkey(), encrypt(), des_setkey() and des_cipher().

The setkey() and encrypt() functions are part of XSI, not the POSIX base
definitions. There is no strict requirement for us to provide these,
especially if we're only going to keep these around as undocumented
stubs. The same holds for des_setkey() and des_cipher().

Instead of providing functions that only generate warnings when linking,
simply disallow linking against them. The impact of this is relatively
low. It only causes two leaf ports to break. I'll see what I can do to
help out to get those fixed.

PR: 211626

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Merge ^/head r303250 through r304235.

Change type of MB_CUR_MAX and MB_CUR_MAX_L() to size_t.

POSIX requires that MB_CUR_MAX expands to an expression of type size_t.
It currently expands to an int. As these are already macros, don't
cha

Change type of MB_CUR_MAX and MB_CUR_MAX_L() to size_t.

POSIX requires that MB_CUR_MAX expands to an expression of type size_t.
It currently expands to an int. As these are already macros, don't
change the underlying type of these functions. There is no ned to touch
those.

Differential Revision: https://reviews.freebsd.org/D6645

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Fix typing of srandom() and initstate().

POSIX requires that these functions have an unsigned int for their first
argument; not an unsigned long.

My reasoning is that we can safely change these fun

Fix typing of srandom() and initstate().

POSIX requires that these functions have an unsigned int for their first
argument; not an unsigned long.

My reasoning is that we can safely change these functions without
breaking the ABI. As far as I know, our supported architectures either
use registers for passing function arguments that are at least as big as
long (e.g., amd64), or int and long are of the same size (e.g., i386).

Reviewed by: ache
Differential Revision: https://reviews.freebsd.org/D6644

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Remove incorrect attributes from posix_memalign(3) declaration.

Both __alloc_align and __alloc_size can't be used when the function
returns a pointer to memory. This fixes breakage when building wit

Remove incorrect attributes from posix_memalign(3) declaration.

Both __alloc_align and __alloc_size can't be used when the function
returns a pointer to memory. This fixes breakage when building with
clang 3.4:

In file included from /usr/src/svn/usr.sbin/bhyve/atkbdc.c:40:
/usr/include/stdlib.h:176:6: error: '__alloc_size__' attribute only
applies to functions that return a pointer [-Werror,-Wignored-attributes]

Pointed out by: ngie, cem
Approved by: re (gjb)

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MFH

Sponsored by: The FreeBSD Foundation

For C++, expose long long types and functions (lldiv_t, llabs, lldiv,
etc) in stdlib.h. These will be needed for newer versions of libc++,
which uses them for defining overloaded versions of abs() a

For C++, expose long long types and functions (lldiv_t, llabs, lldiv,
etc) in stdlib.h. These will be needed for newer versions of libc++,
which uses them for defining overloaded versions of abs() and div().

MFC after: 1 week

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Vendor import of libc++ trunk r256633:
https://llvm.org/svn/llvm-project/libcxx/trunk@256633

Catch up with HEAD (r280229-r284686).

MFH: r282615-r283655

Sponsored by: The FreeBSD Foundation