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[Bug 1817239] Re: add '--targets' option to qemu-binfmt-conf.sh


From: John Snow
Subject: [Bug 1817239] Re: add '--targets' option to qemu-binfmt-conf.sh
Date: Wed, 04 Nov 2020 23:04:47 -0000

This series appears to have stalled as of v7:
https://lists.gnu.org/archive/html/qemu-devel/2019-03/msg04241.html --
moving back to 'New' status.


** Changed in: qemu
       Status: In Progress => New

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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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