devtools: trap SIGINT is not recognizable to dash

  When running checkpatch.sh, it generates the following error
on some linux distributions(like Debian) with Dash as the
default shell interpreter.
trap: SIGINT: bad trap

The fix is to replace SIGINT with INT signal, it works for
both bash and dash.

Fixes: 4bec48184e ("devtools: add checks for ABI symbol addition")
Cc: stable@dpdk.org

Signed-off-by: Gavin Hu <gavin.hu@arm.com>
Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@amr.com>
---
 devtools/checkpatches.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
  

> -----Original Message-----
> From: stable [mailto:stable-bounces@dpdk.org] On Behalf Of Gavin Hu
> Sent: Wednesday, August 1, 2018 6:23 AM
> To: dev@dpdk.org
> Cc: honnappa.nagarahalli@arm.com; gavin.hu@arm.com; stable@dpdk.org
> Subject: [dpdk-stable] [PATCH] devtools: trap SIGINT is not recognizable to
> dash
> 
> When running checkpatch.sh, it generates the following error on some linux
> distributions(like Debian) with Dash as the default shell interpreter.
> trap: SIGINT: bad trap
> 
> The fix is to replace SIGINT with INT signal, it works for both bash and
> dash.
> 
> Fixes: 4bec48184e ("devtools: add checks for ABI symbol addition")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Gavin Hu <gavin.hu@arm.com>
> Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@amr.com>

Acked-by: John McNamara <john.mcnamara@intel.com>
  

Checked with Ubuntu 16.04.4 LTS, it works.

Acked-by: Vipin Varghese <vipin.varghese@intel.com>

> -----Original Message-----
> From: dev <dev-bounces@dpdk.org>
> Sent: Wednesday, August 1, 2018 4:10 PM
> To: Gavin Hu <gavin.hu@arm.com>; dev@dpdk.org
> Cc: honnappa.nagarahalli@arm.com; stable@dpdk.org
> Subject: Re: [dpdk-dev] [dpdk-stable] [PATCH] devtools: trap SIGINT is not
> recognizable to dash
> 
> 
> 
> > -----Original Message-----
> > From: stable [mailto:stable-bounces@dpdk.org] On Behalf Of Gavin Hu
> > Sent: Wednesday, August 1, 2018 6:23 AM
> > To: dev@dpdk.org
> > Cc: honnappa.nagarahalli@arm.com; gavin.hu@arm.com; stable@dpdk.org
> > Subject: [dpdk-stable] [PATCH] devtools: trap SIGINT is not
> > recognizable to dash
> >
> > When running checkpatch.sh, it generates the following error on some
> > linux distributions(like Debian) with Dash as the default shell interpreter.
> > trap: SIGINT: bad trap
> >
> > The fix is to replace SIGINT with INT signal, it works for both bash
> > and dash.
> >
> > Fixes: 4bec48184e ("devtools: add checks for ABI symbol addition")
> > Cc: stable@dpdk.org
> >
> > Signed-off-by: Gavin Hu <gavin.hu@arm.com>
> > Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@amr.com>
> 
> Acked-by: John McNamara <john.mcnamara@intel.com>
>
  

> > When running checkpatch.sh, it generates the following error on some linux
> > distributions(like Debian) with Dash as the default shell interpreter.
> > trap: SIGINT: bad trap
> > 
> > The fix is to replace SIGINT with INT signal, it works for both bash and
> > dash.
> > 
> > Fixes: 4bec48184e ("devtools: add checks for ABI symbol addition")
> > Cc: stable@dpdk.org
> > 
> > Signed-off-by: Gavin Hu <gavin.hu@arm.com>
> > Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@amr.com>
> 
> Acked-by: John McNamara <john.mcnamara@intel.com>

Applied, thanks
  

On Wed,  1 Aug 2018 13:22:57 +0800
Gavin Hu <gavin.hu@arm.com> wrote:

> When running checkpatch.sh, it generates the following error
> on some linux distributions(like Debian) with Dash as the
> default shell interpreter.
> trap: SIGINT: bad trap
> 
> The fix is to replace SIGINT with INT signal, it works for
> both bash and dash.
> 
> Fixes: 4bec48184e ("devtools: add checks for ABI symbol addition")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Gavin Hu <gavin.hu@arm.com>
> Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@amr.com>
> ---
>  devtools/checkpatches.sh | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/devtools/checkpatches.sh b/devtools/checkpatches.sh
> index 2509269df..ba795ad1d 100755
> --- a/devtools/checkpatches.sh
> +++ b/devtools/checkpatches.sh
> @@ -29,7 +29,7 @@ clean_tmp_files() {
>  	fi
>  }
>  
> -trap "clean_tmp_files" SIGINT
> +trap "clean_tmp_files" INT
>  
>  print_usage () {
>  	cat <<- END_OF_HELP

This patch alone is not sufficient to make checkpatch run successfully

./devtools/checkpatches.sh: 52: read: Illegal option -d

It looks like the -d flag to read is also a bash extension.

I recommend changing both checkpatches.sh and check-symbol-changes to have #!/bin/bash
  

Hi Stephen,

I am no sure only supporting bash is acceptable or not. Any impact to freebsd?

We should seek wider opinions about this.

I did not meet your problem, either bash or dash, what's your shell?

Best Regards,
Gavin

> -----Original Message-----
> From: Stephen Hemminger <stephen@networkplumber.org>
> Sent: Saturday, August 4, 2018 6:17 AM
> To: Gavin Hu <Gavin.Hu@arm.com>
> Cc: dev@dpdk.org; Honnappa Nagarahalli
> <Honnappa.Nagarahalli@arm.com>; stable@dpdk.org
> Subject: Re: [dpdk-dev] [PATCH] devtools: trap SIGINT is not recognizable to
> dash
>
> On Wed,  1 Aug 2018 13:22:57 +0800
> Gavin Hu <gavin.hu@arm.com> wrote:
>
> > When running checkpatch.sh, it generates the following error on some
> > linux distributions(like Debian) with Dash as the default shell
> > interpreter.
> > trap: SIGINT: bad trap
> >
> > The fix is to replace SIGINT with INT signal, it works for both bash
> > and dash.
> >
> > Fixes: 4bec48184e ("devtools: add checks for ABI symbol addition")
> > Cc: stable@dpdk.org
> >
> > Signed-off-by: Gavin Hu <gavin.hu@arm.com>
> > Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@amr.com>
> > ---
> >  devtools/checkpatches.sh | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/devtools/checkpatches.sh b/devtools/checkpatches.sh index
> > 2509269df..ba795ad1d 100755
> > --- a/devtools/checkpatches.sh
> > +++ b/devtools/checkpatches.sh
> > @@ -29,7 +29,7 @@ clean_tmp_files() {
> >  fi
> >  }
> >
> > -trap "clean_tmp_files" SIGINT
> > +trap "clean_tmp_files" INT
> >
> >  print_usage () {
> >  cat <<- END_OF_HELP
>
> This patch alone is not sufficient to make checkpatch run successfully
>
> ./devtools/checkpatches.sh: 52: read: Illegal option -d
>
> It looks like the -d flag to read is also a bash extension.
>
> I recommend changing both checkpatches.sh and check-symbol-changes to
> have #!/bin/bash
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On Sat, 4 Aug 2018 06:42:53 +0000
Gavin Hu <Gavin.Hu@arm.com> wrote:

> Hi Stephen,
> 
> I am no sure only supporting bash is acceptable or not. Any impact to freebsd?
> 
> We should seek wider opinions about this.
> 
> I did not meet your problem, either bash or dash, what's your shell?
> 
> Best Regards,
> Gavin

I am running Debian testing, still see complaints about -d

$ dpkg -S /bin/sh
diversion by dash from: /bin/sh
diversion by dash to: /bin/sh.distrib
dash: /bin/sh


Also, requiring bash is not that big an issue on FreeBSD. We already require gnu make
so requiring gnu shell is not something developers should really mind.