2022-08-09 17:39:31

by Daniel Xu

Subject: [PATCH bpf-next 1/2] selftests/bpf: Fix vmtest.sh -h to not require root

Set the exit trap only after argument parsing is done. This way argument
parse failure or `-h` will not require sudo.

Reasoning is that it's confusing that a help message would require root
access.

Signed-off-by: Daniel Xu <[email protected]>
---
tools/testing/selftests/bpf/vmtest.sh | 32 +++++++++++++--------------
1 file changed, 16 insertions(+), 16 deletions(-)

diff --git a/tools/testing/selftests/bpf/vmtest.sh b/tools/testing/selftests/bpf/vmtest.sh
index b86ae4a2e5c5..976ef7585b33 100755
--- a/tools/testing/selftests/bpf/vmtest.sh
+++ b/tools/testing/selftests/bpf/vmtest.sh
@@ -307,6 +307,20 @@ update_kconfig()
fi
}

+catch()
+{
+ local exit_code=$1
+ local exit_status_file="${OUTPUT_DIR}/${EXIT_STATUS_FILE}"
+ # This is just a cleanup and the directory may
+ # have already been unmounted. So, don't let this
+ # clobber the error code we intend to return.
+ unmount_image || true
+ if [[ -f "${exit_status_file}" ]]; then
+ exit_code="$(cat ${exit_status_file})"
+ fi
+ exit ${exit_code}
+}
+
main()
{
local script_dir="$(cd -P -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd -P)"
@@ -353,6 +367,8 @@ main()
done
shift $((OPTIND -1))

+ trap 'catch "$?"' EXIT
+
if [[ $# -eq 0 && "${debug_shell}" == "no" ]]; then
echo "No command specified, will run ${DEFAULT_COMMAND} in the vm"
else
@@ -409,20 +425,4 @@ main()
fi
}

-catch()
-{
- local exit_code=$1
- local exit_status_file="${OUTPUT_DIR}/${EXIT_STATUS_FILE}"
- # This is just a cleanup and the directory may
- # have already been unmounted. So, don't let this
- # clobber the error code we intend to return.
- unmount_image || true
- if [[ -f "${exit_status_file}" ]]; then
- exit_code="$(cat ${exit_status_file})"
- fi
- exit ${exit_code}
-}
-
-trap 'catch "$?"' EXIT
-
main "$@"
--
2.37.1

2022-08-09 18:55:24

by Daniel Müller

Subject: Re: [PATCH bpf-next 1/2] selftests/bpf: Fix vmtest.sh -h to not require root

On Tue, Aug 09, 2022 at 11:11:09AM -0600, Daniel Xu wrote:
> Set the exit trap only after argument parsing is done. This way argument
> parse failure or `-h` will not require sudo.
>
> Reasoning is that it's confusing that a help message would require root
> access.
>
> Signed-off-by: Daniel Xu <[email protected]>
> ---
> tools/testing/selftests/bpf/vmtest.sh | 32 +++++++++++++--------------
> 1 file changed, 16 insertions(+), 16 deletions(-)
>
> diff --git a/tools/testing/selftests/bpf/vmtest.sh b/tools/testing/selftests/bpf/vmtest.sh
> index b86ae4a2e5c5..976ef7585b33 100755
> --- a/tools/testing/selftests/bpf/vmtest.sh
> +++ b/tools/testing/selftests/bpf/vmtest.sh
> @@ -307,6 +307,20 @@ update_kconfig()
> fi
> }
>
> +catch()
> +{
> + local exit_code=$1
> + local exit_status_file="${OUTPUT_DIR}/${EXIT_STATUS_FILE}"
> + # This is just a cleanup and the directory may
> + # have already been unmounted. So, don't let this
> + # clobber the error code we intend to return.
> + unmount_image || true
> + if [[ -f "${exit_status_file}" ]]; then
> + exit_code="$(cat ${exit_status_file})"
> + fi
> + exit ${exit_code}
> +}
> +
> main()
> {
> local script_dir="$(cd -P -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd -P)"
> @@ -353,6 +367,8 @@ main()
> done
> shift $((OPTIND -1))
>
> + trap 'catch "$?"' EXIT
> +
> if [[ $# -eq 0 && "${debug_shell}" == "no" ]]; then
> echo "No command specified, will run ${DEFAULT_COMMAND} in the vm"
> else
> @@ -409,20 +425,4 @@ main()
> fi
> }
>
> -catch()
> -{
> - local exit_code=$1
> - local exit_status_file="${OUTPUT_DIR}/${EXIT_STATUS_FILE}"
> - # This is just a cleanup and the directory may
> - # have already been unmounted. So, don't let this
> - # clobber the error code we intend to return.
> - unmount_image || true
> - if [[ -f "${exit_status_file}" ]]; then
> - exit_code="$(cat ${exit_status_file})"
> - fi
> - exit ${exit_code}
> -}
> -
> -trap 'catch "$?"' EXIT
> -
> main "$@"
> --
> 2.37.1
>

Makes sense and looks good to me.

Acked-by: Daniel M?ller <[email protected]>