null engine: don't dup() stdin anymore

We can now track fd independently of ->fd, so don't open
a file we don't have to use.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

diff --git a/engines/null.c b/engines/null.c
index d61685c700ca7c85230c799552f1c81eda8c8162..cd446b99971c5ada0cd283348877203717585217 100644 (file)
--- a/engines/null.c
+++ b/engines/null.c
@@ -32,7 +32,6 @@ static int fio_null_setup(struct thread_data *td)
        td->total_io_size = td->io_size;
 
        for_each_file(td, f, i) {
        td->total_io_size = td->io_size;
 
        for_each_file(td, f, i) {

-               f->fd = dup(STDOUT_FILENO);

                f->real_file_size = td->total_io_size / td->nr_files;
                f->file_size = f->real_file_size;
        }
                f->real_file_size = td->total_io_size / td->nr_files;
                f->file_size = f->real_file_size;
        }


@@ -43,6 +42,7 @@ static int fio_null_setup(struct thread_data *td)
 static int fio_null_open(struct thread_data fio_unused *td,
                         struct fio_file fio_unused *f)
 {
 static int fio_null_open(struct thread_data fio_unused *td,
                         struct fio_file fio_unused *f)
 {

+       f->fd = 0;

        return 0;
 }
 
        return 0;
 }