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From: "Günther Noack" <gnoack3000@gmail.com>
To: Alejandro Colomar <alx@kernel.org>
Cc: linux-man@vger.kernel.org, "Günther Noack" <gnoack3000@gmail.com>
Subject: [PATCH 08/24] man/man7/socket.7: SO_PEEK_OFF: This option is no longer specific to unix(7)
Date: Fri, 16 Oct 2026 19:31:23 +0200	[thread overview]
Message-ID: <20261016173139.13076-9-gnoack3000@gmail.com> (raw)
In-Reply-To: <20261016173139.13076-1-gnoack3000@gmail.com>

The option is implemented through proto_ops->set_peek_off, which is
nowadays also set for UDP and TCP sockets:

	linux.git 627d2d6b5500 ("udp: enable MSG_PEEK at non-zero offset")
		Linux 4.7, UDP over IPv4 and IPv6
	linux.git 05ea491641d3 ("tcp: add support for SO_PEEK_OFF socket option")
		Linux 6.10, TCP over IPv4
	linux.git be9a4fb831b8 ("tcp: add SO_PEEK_OFF socket option tor TCPv6")
		Linux 6.12, TCP over IPv6

Assisted-by: LLM
Signed-off-by: Günther Noack <gnoack3000@gmail.com>
---

Notes:
    Double checked in code -- this feature has been added to these other
    protocols since that man page section was written; I made sure that we
    have all relevant commits listed as comments in the man page source.

 man/man7/socket.7 | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/man/man7/socket.7 b/man/man7/socket.7
index 96f6f173a40b..ebe0264d7ae4 100644
--- a/man/man7/socket.7
+++ b/man/man7/socket.7
@@ -662,14 +662,24 @@ For more information, see
 .TP
 .BR SO_PEEK_OFF " (since Linux 3.4)"
 .\" commit ef64a54f6e558155b4f149bb10666b9e914b6c54
-This option, which is currently supported only for
-.BR unix (7)
-sockets, sets the value of the "peek offset" for the
+This option sets the value of the "peek offset" for the
 .BR recv (2)
 system call when used with
 .B MSG_PEEK
 flag.
 .IP
+This option is supported for
+.\" commit f55bb7f9cb82dec2f2e803d7bd0fc5929248e4d8
+.BR unix (7)
+sockets since Linux 3.4,
+.\" commit 627d2d6b550094d88f9e518e15967e7bf906ebbf
+for UDP sockets since Linux 4.7,
+and for TCP sockets since
+.\" commit 05ea491641d338422edbd87af3b311c16ea762f5
+Linux 6.10 (IPv4) and
+.\" commit be9a4fb831b8b6dc5724dd3e61973ea91b413ec1
+Linux 6.12 (IPv6).
+.IP
 When this option is set to a negative value
 (it is set to \-1 for all new sockets),
 traditional behavior is provided:
-- 
2.56.0


  parent reply	other threads:[~2026-10-16 17:32 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-10-16 17:31 [PATCH 00/24] Documentation fixes in unix(7) Günther Noack
2026-10-16 17:31 ` [PATCH 01/24] man/man7/unix.7: ERRORS: EINVAL: The address field is sun_family, not sun_type Günther Noack
2026-10-16 17:31 ` [PATCH 02/24] man/man7/unix.7: Socket options: SOL_SOCKET is a level, not a family Günther Noack
2026-10-16 17:31 ` [PATCH 03/24] man/man7/unix.7: SO_PASSCRED: ffix Günther Noack
2026-10-16 17:31 ` [PATCH 04/24] man/man7/sock_diag.7: Fix member order of struct unix_diag_vfs Günther Noack
2026-10-16 17:31 ` [PATCH 05/24] man/man7/sock_diag.7: udiag_wqueue: This is memory in use, not memory available Günther Noack
2026-10-16 17:31 ` [PATCH 06/24] man/man7/unix.7: ERRORS: EPROTONOSUPPORT: Protocol 0 is also accepted Günther Noack
2026-10-16 17:31 ` [PATCH 07/24] man/man7/unix.7: ERRORS: ETOOMANYREFS: Fix the conditions Günther Noack
2026-10-16 17:31 ` Günther Noack [this message]
2026-10-16 17:31 ` [PATCH 09/24] man/man7/unix.7: SO_PEERCRED: Also works for SOCK_SEQPACKET Günther Noack
2026-10-16 17:31 ` [PATCH 10/24] man/man7/unix.7: SIOCINQ: Document behavior " Günther Noack
2026-10-16 17:31 ` [PATCH 11/24] man/man7/sock_diag.7: udiag_states: Document TCP_CLOSE Günther Noack
2026-10-16 17:31 ` [PATCH 12/24] man/man7/sock_diag.7: UNIX_DIAG_NAME: The payload is not always a pathname Günther Noack
2026-10-16 17:31 ` [PATCH 13/24] man/man7/sock_diag.7: Document UDIAG_SHOW_UID Günther Noack
2026-10-16 17:31 ` [PATCH 14/24] man/man7/unix.7: Several items of the same type may be sent in one message Günther Noack
2026-10-16 17:31 ` [PATCH 15/24] man/man2/bind.2: ERRORS: EACCES: Write permission on the directory is required Günther Noack
2026-10-16 17:31 ` [PATCH 16/24] man/man7/unix.7: Autobind: Fix when it happens, and mention SO_PASSPIDFD Günther Noack
2026-10-16 17:31 ` [PATCH 17/24] man/man7/unix.7: SOCK_RAW is accepted as an alias for SOCK_DGRAM Günther Noack
2026-10-16 17:31 ` [PATCH 18/24] man/man7/unix.7: SCM_SECURITY: This is not specific to SELinux Günther Noack
2026-10-16 17:31 ` [PATCH 19/24] man/man7/unix.7: SO_PASSSEC: wfix Günther Noack
2026-10-16 17:31 ` [PATCH 20/24] man/man7/unix.7: ERRORS: Document EACCES, EAGAIN, EMSGSIZE, ENOSPC, and EPERM Günther Noack
2026-10-16 17:31 ` [PATCH 21/24] man/man7/unix.7: Abstract sockets are scoped to a network namespace Günther Noack
2026-10-16 17:31 ` [PATCH 22/24] man/man7/unix.7: Remove mentions of unsupported out-of-band messaging Günther Noack
2026-10-16 17:31 ` [PATCH 23/24] man/man7/unix.7: Document SO_PASSPIDFD, SO_PEERPIDFD, and SCM_PIDFD Günther Noack
2026-10-16 17:31 ` [PATCH 24/24] man/man7/unix.7: Document SO_PASSRIGHTS Günther Noack

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