qemu-binfmt-conf.sh: allow to provide a suffix to the interpreter name

some distros provide a qemu-CPU-static binary beside the qemu-CPU one.
This change allows to use it by providing "--qemu-suffix -static" to the
script.

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20180627205317.10343-4-laurent@vivier.eu>

scripts/qemu-binfmt-conf.sh

@@ -161,12 +161,13 @@ usage() {
     cat <<EOF
 Usage: qemu-binfmt-conf.sh [--qemu-path PATH][--debian][--systemd CPU]
                            [--help][--credential yes|no][--exportdir PATH]
-                           [--persistent yes|no]
+                           [--persistent yes|no][--qemu-suffix SUFFIX]
 
        Configure binfmt_misc to use qemu interpreter
 
        --help:        display this usage
        --qemu-path:   set path to qemu interpreter ($QEMU_PATH)
+       --qemu-suffix: add a suffix to the default interpreter name
        --debian:      don't write into /proc,
                       instead generate update-binfmts templates
        --systemd:     don't write into /proc,
@@ -297,6 +298,7 @@ qemu_set_binfmts() {
             qemu="$QEMU_PATH/qemu-i386"
         fi
 
+        qemu="$qemu$QEMU_SUFFIX"
         if [ "$host_family" != "$family" ] ; then
             $BINFMT_SET
         fi
@@ -312,8 +314,9 @@ DEBIANDIR="/usr/share/binfmts"
 QEMU_PATH=/usr/local/bin
 CREDENTIAL=no
 PERSISTENT=no
+QEMU_SUFFIX=""
 
-options=$(getopt -o ds:Q:e:hc:p: -l debian,systemd:,qemu-path:,exportdir:,help,credential:,persistent: -- "$@")
+options=$(getopt -o ds:Q:S:e:hc:p: -l debian,systemd:,qemu-path:,qemu-suffix:,exportdir:,help,credential:,persistent: -- "$@")
 eval set -- "$options"
 
 while true ; do
@@ -349,6 +352,10 @@ while true ; do
         shift
         QEMU_PATH="$1"
         ;;
+    -F|--qemu-suffix)
+        shift
+        QEMU_SUFFIX="$1"
+        ;;
     -e|--exportdir)
         shift
         EXPORTDIR="$1"