Re: [Qemu-block] [PATCH 3/6] tests: pull qemu-nbd iotest helpers into common.nbd file

[Eric Blake]

On 11/16/18 9:53 AM, Daniel P. Berrangé wrote:
> The helpers for starting/stopping qemu-nbd in 058 will be useful in
> other test cases, so move them into a common.nbd file.
>
> Signed-off-by: Daniel P. Berrangé <address@hidden>
> ---
>   tests/qemu-iotests/058        | 47 +++++------------------------
>   tests/qemu-iotests/common.nbd | 56 +++++++++++++++++++++++++++++++++++
>   2 files changed, 64 insertions(+), 39 deletions(-)
>   create mode 100644 tests/qemu-iotests/common.nbd

> -
> -_cleanup_nbd()
> -{

> -_wait_for_nbd()
> -{

> +++ b/tests/qemu-iotests/common.nbd
> @@ -0,0 +1,56 @@
> +#!/bin/bash

I know we're using bash,

> +
> +function nbd_server_stop()
> +{

> +function nbd_server_wait_for_unix_socket()

and bash supports 'function', but it is an obsolete syntactic sugar 
thing that I don't recommend using.  (In ksh, it actually makes a 
difference in behavior whether you use 'function' or not, and using it 
in 'bash' makes it harder to port code over to 'ksh' - and hence in bash 
it is obsolete because here it does NOT cause the change in behavior 
that ksh users expect)

--
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org