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authorLaurent Vivier <laurent@vivier.eu>2018-06-27 22:53:16 +0200
committerLaurent Vivier <laurent@vivier.eu>2018-07-02 20:16:35 +0200
commit01ecd22a29173168950a27551d0f3490b493467c (patch)
tree86a89ab30bb024e99d4f3f1149d63b94534a3e0f
parent70a77984b3ecc8adc7be42cd22fa3fd103874e49 (diff)
qemu-binfmt-conf.sh: add persistent (F) flags
Since kernel commit 948b701a607f (binfmt_misc: add persistent opened binary handler for containers) kernel allows to load the interpreter at the configuration time. In case of chroot, it allows to have the interpreter in the host root filesystem and not to copy it to the chroot filesystem. Signed-off-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20180627205317.10343-3-laurent@vivier.eu>
-rwxr-xr-xscripts/qemu-binfmt-conf.sh14
1 files changed, 13 insertions, 1 deletions
diff --git a/scripts/qemu-binfmt-conf.sh b/scripts/qemu-binfmt-conf.sh
index 9900554608..00c9c3aa16 100755
--- a/scripts/qemu-binfmt-conf.sh
+++ b/scripts/qemu-binfmt-conf.sh
@@ -161,6 +161,7 @@ usage() {
cat <<EOF
Usage: qemu-binfmt-conf.sh [--qemu-path PATH][--debian][--systemd CPU]
[--help][--credential yes|no][--exportdir PATH]
+ [--persistent yes|no]
Configure binfmt_misc to use qemu interpreter
@@ -176,6 +177,9 @@ Usage: qemu-binfmt-conf.sh [--qemu-path PATH][--debian][--systemd CPU]
(default: $SYSTEMDDIR or $DEBIANDIR)
--credential: if yes, credential and security tokens are
calculated according to the binary to interpret
+ --persistent: if yes, the interpreter is loaded when binfmt is
+ configured and remains in memory. All future uses
+ are cloned from the open file.
To import templates with update-binfmts, use :
@@ -245,6 +249,9 @@ qemu_generate_register() {
if [ "$CREDENTIAL" = "yes" ] ; then
flags="OC"
fi
+ if [ "$PERSISTENT" = "yes" ] ; then
+ flags="${flags}F"
+ fi
echo ":qemu-$cpu:M::$magic:$mask:$qemu:$flags"
}
@@ -304,8 +311,9 @@ DEBIANDIR="/usr/share/binfmts"
QEMU_PATH=/usr/local/bin
CREDENTIAL=no
+PERSISTENT=no
-options=$(getopt -o ds:Q:e:hc: -l debian,systemd:,qemu-path:,exportdir:,help,credential: -- "$@")
+options=$(getopt -o ds:Q:e:hc:p: -l debian,systemd:,qemu-path:,exportdir:,help,credential:,persistent: -- "$@")
eval set -- "$options"
while true ; do
@@ -353,6 +361,10 @@ while true ; do
shift
CREDENTIAL="$1"
;;
+ -p|--persistent)
+ shift
+ PERSISTENT="$1"
+ ;;
*)
break
;;