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Re: [Qemu-devel] [Bug 1817239] [NEW] add '--targets' option to qemu-binf


From: Laurent Vivier
Subject: Re: [Qemu-devel] [Bug 1817239] [NEW] add '--targets' option to qemu-binfmt-conf.sh
Date: Fri, 22 Feb 2019 07:32:57 -0000

On 22/02/2019 04:31, Launchpad Bug Tracker wrote:
> I'd like to ask for the addition of option '--targets' to scripts/qemu-
> binfmt-conf.sh, in order to allow registering the interpreters for the
> given list of architectures only, instead of using all of the ones
> defined in qemu_target_list. The following is a possible patch that
> implements it:
> 
>   qemu-binfmt-conf.sh | 9 ++++++++-
>   1 file changed, 8 insertions(+), 1 deletion(-)

Please send your patch to the qemu-devel mailing list.

I think it's a good idea but we should homogenize "--debian" and 
"--systemd": remove the parameter from  "--systemd" to generate by 
default all the targets, and allow the user to provide a subset of the 
targets using the newly introduced "--target" parameter.

Thanks,
Laurent

-- 
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https://bugs.launchpad.net/bugs/1817239

Title:
  add '--targets' option to qemu-binfmt-conf.sh

Status in QEMU:
  New

Bug description:
  I'd like to ask for the addition of option '--targets' to scripts
  /qemu-binfmt-conf.sh, in order to allow registering the interpreters
  for the given list of architectures only, instead of using all of the
  ones defined in qemu_target_list. The following is a possible patch
  that implements it:

   qemu-binfmt-conf.sh | 9 ++++++++-
   1 file changed, 8 insertions(+), 1 deletion(-)

  diff --git a/qemu-binfmt-conf.sh b/qemu-binfmt-conf.sh
  index b5a1674..be4a19b 100644
  --- a/qemu-binfmt-conf.sh
  +++ b/qemu-binfmt-conf.sh
  @@ -170,6 +170,7 @@ usage() {
   Usage: qemu-binfmt-conf.sh [--qemu-path PATH][--debian][--systemd CPU]
                              [--help][--credential yes|no][--exportdir PATH]
                              [--persistent yes|no][--qemu-suffix SUFFIX]
  +                           [--targets TARGETS]

          Configure binfmt_misc to use qemu interpreter

  @@ -189,6 +190,8 @@ Usage: qemu-binfmt-conf.sh [--qemu-path 
PATH][--debian][--systemd CPU]
          --persistent:  if yes, the interpreter is loaded when binfmt is
                         configured and remains in memory. All future uses
                         are cloned from the open file.
  +       --targets:     comma-separated list of targets. If provided, only
  +                      the targets in the list are registered.

       To import templates with update-binfmts, use :

  @@ -324,7 +327,7 @@ CREDENTIAL=no
   PERSISTENT=no
   QEMU_SUFFIX=""

  -options=$(getopt -o ds:Q:S:e:hc:p: -l 
debian,systemd:,qemu-path:,qemu-suffix:,exportdir:,help,credential:,persistent: 
-- "$@")
  +options=$(getopt -o ds:Q:S:e:hc:p:t: -l 
debian,systemd:,qemu-path:,qemu-suffix:,exportdir:,help,credential:,persistent:,targets:
 -- "$@")
   eval set -- "$options"

   while true ; do
  @@ -380,6 +383,10 @@ while true ; do
           shift
           PERSISTENT="$1"
           ;;
  +    -t|--targets)
  +        shift
  +        qemu_target_list="$(echo "$1" | tr ',' ' ')"
  +        ;;
       *)
           break
           ;;
  --
  2.20.1

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