Hello Nikola, On 6/24/19 1:20 PM, Nikola Forró wrote: > Since introduction of MAP_SHARED_VALIDATE, in case flags contain > both MAP_PRIVATE and MAP_SHARED, mmap() doesn't fail with EINVAL, > it succeeds. > > The reason for that is that MAP_SHARED_VALIDATE is in fact equal > to MAP_PRIVATE | MAP_SHARED. > > This is intended behavior, see: > https://lwn.net/Articles/758594/ > https://lwn.net/Articles/758598/ Patch applied. Thanks for the excellent detail in covering message. Cheers, Michael > > Signed-off-by: Nikola Forró <nforro@xxxxxxxxxx> > --- > man2/mmap.2 | 8 ++++---- > 1 file changed, 4 insertions(+), 4 deletions(-) > > diff --git a/man2/mmap.2 b/man2/mmap.2 > index cea0bd372..b41e8b9ca 100644 > --- a/man2/mmap.2 > +++ b/man2/mmap.2 > @@ -565,11 +565,11 @@ was 0. > .TP > .B EINVAL > .I flags > -contained neither > -.B MAP_PRIVATE > +contained none of > +.BR MAP_PRIVATE , > +.B MAP_SHARED > or > -.BR MAP_SHARED , > -or contained both of these values. > +.BR MAP_SHARED_VALIDATE . > .TP > .B ENFILE > .\" This is for shared anonymous segments > -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/
