On 04/04/2014 10:24 AM, Andrey Vagin wrote:
> Here is no difference between MAP_SHARED and MAP_PRIVATE.
Thanks, Andrey. That man page text has been there for a very long time,
but but does not seem to correspond to the truth in any kernel version
going back even to Linux 1.0. Patch applied.
Cheers,
Michael
> 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 <[email protected]>
> ---
> 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
>
--
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/
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