linux-kernel - [PATCH] maps.2: fd for a file mapping must be opened for reading

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Date:	Fri,  4 Apr 2014 12:24:35 +0400
From:	Andrey Vagin <avagin@...nvz.org>
To:	Michael Kerrisk <mtk.manpages@...il.com>
Cc:	linux-man@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, Andrey Vagin <avagin@...nvz.org>
Subject: [PATCH] maps.2: fd for a file mapping must be opened for reading

Here is no difference between MAP_SHARED and MAP_PRIVATE.

do_mmap_pgoff()
	switch (flags & MAP_TYPE) {
	case MAP_SHARED:
	...
	/* fall through */
	case MAP_PRIVATE:
		if (!(file->f_mode & FMODE_READ))
			return -EACCES;

Signed-off-by: Andrey Vagin <avagin@...nvz.org>
---
 man2/mmap.2 | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/man2/mmap.2 b/man2/mmap.2
index c0fd321..b469f84 100644
--- a/man2/mmap.2
+++ b/man2/mmap.2
@@ -393,9 +393,7 @@ is set (probably to
 .TP
 .B EACCES
 A file descriptor refers to a non-regular file.
-Or
-.B MAP_PRIVATE
-was requested, but
+Or a file mapping was requested, but
 .I fd
 is not open for reading.
 Or
-- 
1.8.5.3

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