lib: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl s

lib: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl script.

Sponsored by: Netflix

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Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

libc: move declaration of 'char **environ' to common private header

Suggested by: imp
Reviewed by: markj
Tested by: markj (aarch64)
Sponsored by: The FreeBSD Foundation
MFC after: 3 weeks
Differenti

libc: move declaration of 'char **environ' to common private header

Suggested by: imp
Reviewed by: markj
Tested by: markj (aarch64)
Sponsored by: The FreeBSD Foundation
MFC after: 3 weeks
Differential revision: https://reviews.freebsd.org/D37220

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libc: popen: slightly simplify cloexec logic

No need to check the mode again here; we know that `iop` wraps the
correct fd.

Reviewed by: bapt
Differential Revision: https://reviews.freebsd.org/D379

libc: popen: slightly simplify cloexec logic

No need to check the mode again here; we know that `iop` wraps the
correct fd.

Reviewed by: bapt
Differential Revision: https://reviews.freebsd.org/D37987

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Clean up the vcs ID strings in libc's gen/ directory.

- Move CSRG IDs into __SCCSID().
- When a file has been copied, consistently use 'From: <tag>' for strings
referencing the version of the sour

Clean up the vcs ID strings in libc's gen/ directory.

- Move CSRG IDs into __SCCSID().
- When a file has been copied, consistently use 'From: <tag>' for strings
referencing the version of the source file copied from in the license
block comment.
- Some of the 'From:' tags were using $FreeBSD$ that was being expanded on
each checkout. Fix those to hardcode the FreeBSD tag from the file that
was copied at the time of the copy.
- When multiple strings are present list them in "chronological" order,
so CSRG (__SCCSID) before FreeBSD (__FBSDID). If a file came from
OtherBSD and contains a CSRG ID from the OtherBSD file, use the order
CSRG -> OtherBSD -> FreeBSD.

Reviewed by: imp
Differential Revision: https://reviews.freebsd.org/D15831

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Merge ^/head r325999 through r326131.

General 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 f

General 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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Merge ^/head r314420 through r314481.

Renumber copyright clause 4

Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is

Renumber copyright clause 4

Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is too pedantic, so give up on that point.

Submitted by: Jan Schaumann <jschauma@stevens.edu>
Pull Request: https://github.com/freebsd/freebsd/pull/96

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MFH r289384-r293170

Sponsored by: The FreeBSD Foundation

Catch up with head.

popen() requires check for fdopen() failure

Move fdopen() up near other resource allocation like malloc(); do proper
deallocation on failure later on in the function.

Submitted by: Ramachandra Topa

popen() requires check for fdopen() failure

Move fdopen() up near other resource allocation like malloc(); do proper
deallocation on failure later on in the function.

Submitted by: Ramachandra Topannavar <rtopannavar@panasas.com>
Reviewed by: jilles
Approved by: jhb (mentor)
MFC after: 2 weeks
Sponsored by: Panasas, Inc.
Differential Revision: https://reviews.freebsd.org/D4126

M lib/libc/gen/popen.c

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Merge from head

Sponsored by: Gandi.net

Merge from head

Merge from head

Sync up with head (up to r288341).

Merge ^/head r287878 through r288034.

Use ANSI C prototypes. Eliminates -Wold-style-definition warnings.

Merge head

IFC @264767

MFC @ r259205 in preparation for some SVM updates. (for real this time)

Merge head r232040 through r257457.
M usr.sbin/portsnap/portsnap/portsnap.8
M usr.sbin/portsnap/portsnap/portsnap.sh
M usr.sbin/tcpdump/tcpdump/Makefile

popen(): Try to prevent inappropriate fd passing even if 'e' is not used.

Even though not all race conditions can be fixed if the 'e' option is not
used, still fix some race conditions using pipe2()

popen(): Try to prevent inappropriate fd passing even if 'e' is not used.

Even though not all race conditions can be fixed if the 'e' option is not
used, still fix some race conditions using pipe2():

* Prevent both ends of the pipe from leaking to a concurrent popen().

* Prevent the child process's end of the pipe from leaking to any concurrent
fork and exec.

This change also simplifies the code.

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Merge from head

IFC @ r254014