libc: Purge unneeded cdefs.h

These sys/cdefs.h are not needed. Purge them. They are mostly left-over
from the $FreeBSD$ removal. A few in libc are still required for macros
that cdefs.h defines. Kee

libc: Purge unneeded cdefs.h

These sys/cdefs.h are not needed. Purge them. They are mostly left-over
from the $FreeBSD$ removal. A few in libc are still required for macros
that cdefs.h defines. Keep those.

Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D42385

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Remove $FreeBSD$: one-line .c comment pattern

Remove /^/[*/]\s*\$FreeBSD\$.*\n/

MFHead @r350386

Sponsored by: The FreeBSD Foundation

libc: correct iconv buffer overflow

admbugs: 920
Submitted by: Andrea Venturoli, gabor
Reported by: Andrea Venturoli <security@netfence.it>, NetFence
Security: CVE-2019-5600
Security: FreeBSD-SA-19:

libc: correct iconv buffer overflow

admbugs: 920
Submitted by: Andrea Venturoli, gabor
Reported by: Andrea Venturoli <security@netfence.it>, NetFence
Security: CVE-2019-5600
Security: FreeBSD-SA-19:09.iconv

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libc: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using mis-identified many licenses so this was mostly a manual - error
p

libc: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using mis-identified many licenses so this was mostly a manual - error
prone - task.

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.

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Merge ^/head r325999 through r326131.

iconv: Fix a pointer mismatch.

Catch NULL pointer earlier, check for empty string later.
Apparently this fixes a GCC8 warning.

Obtained from: NetBSD (CVS Rev. 1.21, 1.22) through DragonFlyBSD
MFC a

iconv: Fix a pointer mismatch.

Catch NULL pointer earlier, check for empty string later.
Apparently this fixes a GCC8 warning.

Obtained from: NetBSD (CVS Rev. 1.21, 1.22) through DragonFlyBSD
MFC after: 1 week

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Catch up with HEAD (r280229-r284686).

Merge sync of head

Merge from head

MFH: r280643-r281852

Sponsored by: The FreeBSD Foundation

Remove the const qualifier from iconv(3) to comply with POSIX:
http://pubs.opengroup.org/onlinepubs/9699919799/functions/iconv.html

Adjust all code that calls iconv.

PR: 199099
Exp-run by: antoine

Remove the const qualifier from iconv(3) to comply with POSIX:
http://pubs.opengroup.org/onlinepubs/9699919799/functions/iconv.html

Adjust all code that calls iconv.

PR: 199099
Exp-run by: antoine
MFC after: 2 weeks

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Merge head r233826 through r256722.

Merge from head

IFC @ r254014

IFC @253398

IFC @ r252763

As a followup to r252547, propate const down the call stack.

IFC @ r226824

MFC

- Fix a trivial bug in iconv. When there is no space to perform the
conversion, conversion must fail and errno must be set to E2BIG.

PR: standards/160673
Submitted by: Henning Petersen <henning.p

- Fix a trivial bug in iconv. When there is no space to perform the
conversion, conversion must fail and errno must be set to E2BIG.

PR: standards/160673
Submitted by: Henning Petersen <henning.petersen@t-online.de>
Reviewed by: pluknet
Approved by: re (kib), delphij (mentor)

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Add the BSD-licensed Citrus iconv to the base system with default off
setting. It can be built by setting the WITH_ICONV knob. While this
knob is unset, the library part, the binaries, the header fil

Add the BSD-licensed Citrus iconv to the base system with default off
setting. It can be built by setting the WITH_ICONV knob. While this
knob is unset, the library part, the binaries, the header file and
the metadata files will not be built or installed so it makes no impact
on the system if left turned off.

This work is based on the iconv implementation in NetBSD but a great
number of improvements and feature additions have been included:

- Some utilities have been added. There is a conversion table generator,
which can compare conversion tables to reference data generated by
GNU libiconv. This helps ensuring conversion compatibility.
- UTF-16 surrogate support and some endianness issues have been fixed.
- The rather chaotic Makefiles to build metadata have been refactored
and cleaned up, now it is easy to read and it is also easier to add
support for new encodings.
- A bunch of new encodings and encoding aliases have been added.
- Support for 1->2, 1->3 and 1->4 mappings, which is needed for
transliterating with flying accents as GNU does, like "u.
- Lots of warnings have been fixed, the major part of the code is
now WARNS=6 clean.
- New section 1 and section 5 manual pages have been added.
- Some GNU-specific calls have been implemented:
iconvlist(), iconvctl(), iconv_canonicalize(), iconv_open_into()
- Support for GNU's //IGNORE suffix has been added.
- The "-" argument for stdin is now recognized in iconv(1) as per POSIX.
- The Big5 conversion module has been fixed.
- The iconv.h header files is supposed to be compatible with the
GNU version, i.e. sources should build with base iconv.h and
GNU libiconv. It also includes a macro magic to deal with the
char ** and const char ** incompatibility.
- GNU compatibility: "" or "char" means the current local
encoding in use
- Various cleanups and style(9) fixes.

Approved by: delphij (mentor)
Obtained from: The NetBSD Project
Sponsored by: Google Summer of Code 2009

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