[PATCH v2] tools/virtio: virtio_test -h,--help should return directly

[PATCH v2] tools/virtio: virtio_test -h,--help should return directly

[Rong Tao]

From: Rong Tao <rongtao@cestc.cn>

When we get help information, we should return directly, and we should not
execute test cases. Move the exit() directly into the help() function and
remove it from case '?'.

Signed-off-by: Rong Tao <rongtao@cestc.cn>
---
v2: help(): exit with a value different from 0 (e.g. 2).
v1: https://lore.kernel.org/lkml/tencent_4B5122C4158323A1D1ACA04B3295F1579207@qq.com/
---
 tools/virtio/virtio_test.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/tools/virtio/virtio_test.c b/tools/virtio/virtio_test.c
index 120062f94590..33e17307441f 100644
--- a/tools/virtio/virtio_test.c
+++ b/tools/virtio/virtio_test.c
@@ -327,7 +327,7 @@ const struct option longopts[] = {
 	}
 };
 
-static void help(void)
+static void help(int status)
 {
 	fprintf(stderr, "Usage: virtio_test [--help]"
 		" [--no-indirect]"
@@ -337,6 +337,8 @@ static void help(void)
 		" [--batch=random/N]"
 		" [--reset=N]"
 		"\n");
+
+	exit(status);
 }
 
 int main(int argc, char **argv)
@@ -354,14 +356,12 @@ int main(int argc, char **argv)
 		case -1:
 			goto done;
 		case '?':
-			help();
-			exit(2);
+			help(2);
 		case 'e':
 			features &= ~(1ULL << VIRTIO_RING_F_EVENT_IDX);
 			break;
 		case 'h':
-			help();
-			goto done;
+			help(0);
 		case 'i':
 			features &= ~(1ULL << VIRTIO_RING_F_INDIRECT_DESC);
 			break;
-- 
2.39.1

Re: [PATCH v2] tools/virtio: virtio_test -h,--help should return directly

[Stefano Garzarella]

On Thu, Mar 09, 2023 at 04:42:50PM +0800, Rong Tao wrote:
>From: Rong Tao <rongtao@cestc.cn>
>
>When we get help information, we should return directly, and we should not
>execute test cases. Move the exit() directly into the help() function and
>remove it from case '?'.
>
>Signed-off-by: Rong Tao <rongtao@cestc.cn>
>---
>v2: help(): exit with a value different from 0 (e.g. 2).
>v1: https://lore.kernel.org/lkml/tencent_4B5122C4158323A1D1ACA04B3295F1579207@qq.com/
>---
> tools/virtio/virtio_test.c | 10 +++++-----
> 1 file changed, 5 insertions(+), 5 deletions(-)
>
>diff --git a/tools/virtio/virtio_test.c b/tools/virtio/virtio_test.c
>index 120062f94590..33e17307441f 100644
>--- a/tools/virtio/virtio_test.c
>+++ b/tools/virtio/virtio_test.c
>@@ -327,7 +327,7 @@ const struct option longopts[] = {
> 	}
> };
>
>-static void help(void)
>+static void help(int status)
> {
> 	fprintf(stderr, "Usage: virtio_test [--help]"
> 		" [--no-indirect]"
>@@ -337,6 +337,8 @@ static void help(void)
> 		" [--batch=random/N]"
> 		" [--reset=N]"
> 		"\n");
>+
>+	exit(status);

Sorry, I meant you can put exit(2) here, and remove the `int status` 
parameter of help().

> }
>
> int main(int argc, char **argv)
>@@ -354,14 +356,12 @@ int main(int argc, char **argv)
> 		case -1:
> 			goto done;
> 		case '?':
>-			help();
>-			exit(2);
>+			help(2);

Here you can use help()

> 		case 'e':
> 			features &= ~(1ULL << VIRTIO_RING_F_EVENT_IDX);
> 			break;
> 		case 'h':
>-			help();
>-			goto done;
>+			help(0);

And also here you can use help()

I'm sure you're learning the process, so as a suggestion for the future,
if some thing is not clear, better to ask before sending another
version.

Thanks,
Stefano

> 		case 'i':
> 			features &= ~(1ULL << 
> 			VIRTIO_RING_F_INDIRECT_DESC);
> 			break;
>-- 
>2.39.1
>

Re: [PATCH] tools/virtio: virtio_test -h,--help should return directly

[Rong Tao]

Hi, Stefano.

I'm wondering, does '-h,--help' help() should 'exit(0)'? Is '-h' considered
a successful run and returns '0'.

Best wishes,
Rong

Re: [PATCH] tools/virtio: virtio_test -h,--help should return directly

[Stefano Garzarella]

On Thu, Mar 09, 2023 at 04:56:09PM +0800, Rong Tao wrote:
>Hi, Stefano.
>
>I'm wondering, does '-h,--help' help() should 'exit(0)'? Is '-h' considered
>a successful run and returns '0'.

You're right.
I thought -h would return an error, but that's not the case, so I guess
this patch is fine!

Thanks,
Stefano

>
>Best wishes,
>Rong
>

Re: [PATCH v2] tools/virtio: virtio_test -h,--help should return directly

[Stefano Garzarella]

On Thu, Mar 09, 2023 at 04:42:50PM +0800, Rong Tao wrote:
>From: Rong Tao <rongtao@cestc.cn>
>
>When we get help information, we should return directly, and we should not
>execute test cases. Move the exit() directly into the help() function and
>remove it from case '?'.
>
>Signed-off-by: Rong Tao <rongtao@cestc.cn>
>---
>v2: help(): exit with a value different from 0 (e.g. 2).
>v1: https://lore.kernel.org/lkml/tencent_4B5122C4158323A1D1ACA04B3295F1579207@qq.com/
>---
> tools/virtio/virtio_test.c | 10 +++++-----
> 1 file changed, 5 insertions(+), 5 deletions(-)

Acked-by: Stefano Garzarella <sgarzare@redhat.com>