The branch main has been updated by ygy (doc committer):
URL:
https://cgit.FreeBSD.org/src/commit/?id=504e64af32ba6c62fdcc894a3b1da76061c64796
commit 504e64af32ba6c62fdcc894a3b1da76061c64796
Author: Guangyuan Yang <y...@freebsd.org>
AuthorDate: 2021-02-20 08:03:15 +0000
Commit: Guangyuan Yang <y...@freebsd.org>
CommitDate: 2021-02-20 08:05:43 +0000
pwrite(2): add a BUGS section
Add a BUGS section about using pwrite(2) when O_APPEND is set on the fd.
MFC after: 3 days
Submitted by: Ka Ho Ng <khng...@gmail.com>
Reviewed by: gbe, yuripv
Differential Revision: https://reviews.freebsd.org/D28372
---
lib/libc/sys/write.2 | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/lib/libc/sys/write.2 b/lib/libc/sys/write.2
index f05db0de81c4..937e95b53a14 100644
--- a/lib/libc/sys/write.2
+++ b/lib/libc/sys/write.2
@@ -28,7 +28,7 @@
.\" @(#)write.2 8.5 (Berkeley) 4/2/94
.\" $FreeBSD$
.\"
-.Dd October 25, 2020
+.Dd February 11, 2021
.Dt WRITE 2
.Os
.Sh NAME
@@ -298,3 +298,17 @@ The
.Fn write
function appeared in
.At v1 .
+.Sh BUGS
+The
+.Fn pwrite
+system call appends the file without changing the file offset if
+.Dv O_APPEND
+is set, contrary to
+.St -p1003.1-2008
+where
+.Fn pwrite
+writes into
+.Fa offset
+regardless of whether
+.Dv O_APPEND
+is set.
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