From 6b74f6c767babd21c8ee3533bf599a90e5c851b2 Mon Sep 17 00:00:00 2001
From: Michael Kerrisk <mtk.manpages@gmail.com>
Date: Mon, 20 Feb 2017 22:33:49 +0100
Subject: [PATCH] lseek.2: O_APPEND overrides the effect of lseek() when doing
 file writes

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
---
 man2/lseek.2 | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/man2/lseek.2 b/man2/lseek.2
index 4ff462066..33ef814a3 100644
--- a/man2/lseek.2
+++ b/man2/lseek.2
@@ -237,6 +237,15 @@ See
 for a discussion of the relationship between file descriptors,
 open file descriptions, and files.
 
+If the
+.B O_APPEND
+file status flag is set on the open file description,
+then a
+.BR write (2)
+.I always
+moves the file offset to the end of the file, regardless of the use of
+.BR lseek ().
+
 The
 .I off_t
 data type is a signed integer data type specified by POSIX.1.