Re: [Qemu-block] [PATCH v5 05/10] qemu-iotests: change qemu pid and fd tracking / cleanup

[Eric Blake]

On 10/17/2017 11:31 AM, Jeff Cody wrote:
> So that later patches can cleanup running qemu processes called from
> different subshells, track resources to cleanup in pid and fd list
> files.
> 
> In subsquent patches, ./check will kill all QEMU processes launched with
> the common.qemu framework, and the tests will not need to cleanup
> manually (unless they want to do so as part of the test, e.g. wait for
> a process to end such as migration).
> 
> Signed-off-by: Jeff Cody <address@hidden>
> ---
>  tests/qemu-iotests/common.qemu | 82 
> ++++++++++++++++++++++++++++++++----------
>  tests/qemu-iotests/common.rc   |  3 +-
>  2 files changed, 64 insertions(+), 21 deletions(-)

Modulo the typo in the commit message in response to your other tweaks,


> +    # get line count, and therefore number of processes to kill
> +    numproc=$(wc -l "${QEMU_PID_LIST}" | sed 's/\s.*//')

Instead of having to use sed, just do:

numproc=$(wc -l < "${QEMU_PID_LIST}")

wc is required to behave differently when parsing stdin than when
parsing a named file, so you might as well take advantage of it.

> +
> +    for i in $(seq 1 $numproc)

Are we sure seq is always available?  Shave a subshell, and avoid the
dependency, by using bash's:

for i in {1..$numproc}

> +++ b/tests/qemu-iotests/common.rc
> @@ -40,7 +40,6 @@ poke_file()
>      printf "$3" | dd "of=$1" bs=1 "seek=$2" conv=notrunc &>/dev/null
>  }
>  
> -
>  if ! . ./common.config

Spurious whitespace change?



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

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