libsys: relocate implementations and manpages

Remove core system call implementations and documentation to lib/libsys
and lib/libsys/<arch> from lib/libc/sys and lib/libc/<arch>/<sys>.
Update paths

libsys: relocate implementations and manpages

Remove core system call implementations and documentation to lib/libsys
and lib/libsys/<arch> from lib/libc/sys and lib/libc/<arch>/<sys>.
Update paths to allow libc to find them in their new home.

Reviewed by: kib, emaste, imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/908

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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 nroff pattern

Remove /^\.\\"\s*\$FreeBSD\$$\n/

Document handling of connection-mode sockets by sendto(2).

sendto(2), sendmsg(2) and sendmmsg(2) return ENOTCONN if a destination
address is specified and the socket is not connected and the socket

Document handling of connection-mode sockets by sendto(2).

sendto(2), sendmsg(2) and sendmmsg(2) return ENOTCONN if a destination
address is specified and the socket is not connected and the socket
protocol does not automatically connect ("implied connect"). Document
that. Also document the fact that the destination address is ignored
for connection-mode sockets if the socket is already connected.

PR: 245817
Submitted by: Erik Inge Bolsø <knan-bfo@modirum.com>
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D24530

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Support MSG_DONTWAIT in send*(2).

As it does for recv*(2), MSG_DONTWAIT indicates that the call should
not block, returning EAGAIN instead. Linux and OpenBSD both implement
this, so the change make

Support MSG_DONTWAIT in send*(2).

As it does for recv*(2), MSG_DONTWAIT indicates that the call should
not block, returning EAGAIN instead. Linux and OpenBSD both implement
this, so the change makes porting easier, especially since we do not
return EINVAL or so when unrecognized flags are specified.

Submitted by: Greg V <greg@unrelenting.technology>
Reviewed by: tuexen
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D18728

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Document socket control message routines for ancillary data access (CMSG_DATA).

PR: 227777
Reviewed by: bcr, eadler
Approved by: mat (mentor), manpages (bcr)
Obtained from: OpenBSD
Differential Rev

Document socket control message routines for ancillary data access (CMSG_DATA).

PR: 227777
Reviewed by: bcr, eadler
Approved by: mat (mentor), manpages (bcr)
Obtained from: OpenBSD
Differential Revision: https://reviews.freebsd.org/D15215

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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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Remove <sys/types.h> from the SYNOPSIS.

Add implementations of sendmmsg(3) and recvmmsg(3) functions which
wraps sendmsg(2) and recvmsg(2) into batch send and receive operation.
The goal of this implementation is only to provide API compat

Add implementations of sendmmsg(3) and recvmmsg(3) functions which
wraps sendmsg(2) and recvmsg(2) into batch send and receive operation.
The goal of this implementation is only to provide API compatibility
with Linux.

The cancellation behaviour of the functions is not quite right, but
due to relative rare use of cancellation it is considered acceptable
comparing with the complexity of the correct implementation. If
functions are reimplemented as syscalls, the fix would come almost
trivial. The direct use of the syscall trampolines instead of libc
wrappers for sendmsg(2) and recvmsg(2) is to avoid data loss on
cancellation.

Submitted by: Boris Astardzhiev <boris.astardzhiev@gmail.com>
Discussed with: jilles (cancellation behaviour)
MFC after: 1 month

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Standardize the various prison_foo_ip[46] functions and prison_if to
return zero on success and an error code otherwise. The possible errors
are EADDRNOTAVAIL if an address being checked for doesn't

Standardize the various prison_foo_ip[46] functions and prison_if to
return zero on success and an error code otherwise. The possible errors
are EADDRNOTAVAIL if an address being checked for doesn't match the
prison, and EAFNOSUPPORT if the prison doesn't have any addresses in
that address family. For most callers of these functions, use the
returned error code instead of e.g. a hard-coded EADDRNOTAVAIL or
EINVAL.

Always include a jailed() check in these functions, where a non-jailed
cred always returns success (and makes no changes). Remove the explicit
jailed() checks that preceded many of the function calls.

Approved by: bz (mentor)

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Remove the MSG_PEEK flag from the documentation of the send(2) syscall -
it is only relevant to receiving data from sockets, not to sending.

PR: 109667
Submitted by: Jari Kirma <kirma@cs.hut.fi>
Ap

Remove the MSG_PEEK flag from the documentation of the send(2) syscall -
it is only relevant to receiving data from sockets, not to sending.

PR: 109667
Submitted by: Jari Kirma <kirma@cs.hut.fi>
Approved by: wollman

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Per Regents of the University of Calfornia letter, remove advertising
clause.

# If I've done so improperly on a file, please let me know.

Remove reference to T/TCP.

Reviewed by: andre

Assorted markup fixes.

Approved by: re

Make MSG_NOSIGNAL available to native programs.
Bump FreeBSD_version to note this change.

Reviewed by: sobomax

Expand *n't contractions.

EISCONN may be returned by sendto() if an attempt is made to specify the
destination address to a datagram socket that is already connected.

Submitted by: Rudolf Cejka <cejkar@fit.vutbr.cz>
PR: doc

EISCONN may be returned by sendto() if an attempt is made to specify the
destination address to a datagram socket that is already connected.

Submitted by: Rudolf Cejka <cejkar@fit.vutbr.cz>
PR: docs/76399
MFC after: 1 week

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Sort sections.

Mechanically kill hard sentence breaks.

Markup, grammar, and spelling fixes.

s/SS_CANTSENDMORE/SBS_CANTSENDMORE/

Spelling fixes.

Document the fact that in a jailed environment, sendto(2) could fail
returning EPERM if the source address specified in the IP header did
not match the address bound to the prison.

Approved by: bmil

Document the fact that in a jailed environment, sendto(2) could fail
returning EPERM if the source address specified in the IP header did
not match the address bound to the prison.

Approved by: bmilekic (mentor)

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Document the fact that send(2) can return EPIPE (like when a socket is not
connected).

PR: docs/56683
Submitted by: Chris S.J. Peron <maneo@bsdpro.com>
MFC after: 3 days

mdoc(7) police: "The .Fa argument.".