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Commit d880214d d880214df6b0261cf5d1e5d6b980d979f6479a55 by Alain Magloire
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Only call msync() when the file is open with PROT_WRITE

1 parent e2222e60
Inline Side-by-side
Showing 1 changed file with 2 additions and 2 deletions
......@@ -187,7 +187,7 @@ _mapfile_size (stream_t stream, off_t *psize)
if (mfs->ptr == MAP_FAILED)
return EINVAL;
if (mfs->ptr)
if (mfs->ptr && (mfs->flags & PROT_WRITE))
msync (mfs->ptr, mfs->size, MS_SYNC);
if (fstat(mfs->fd, &stbuf) != 0)
return errno;
......@@ -229,7 +229,7 @@ static int
_mapfile_flush (stream_t stream)
{
struct _mapfile_stream *mfs = stream_get_owner (stream);
if (mfs->ptr != MAP_FAILED && mfs->ptr != NULL)
if (mfs->ptr != MAP_FAILED && mfs->ptr != NULL && (mfs->flags & PROT_WRITE))
return msync (mfs->ptr, mfs->size, MS_SYNC);
return 0;
}
......