kvm : support des sockets de monitoring

qemu/bin/diskpath

@@ -1,3 +1,16 @@
 #!/bin/sh -e
+
+# Invoked on termination if the last command failed
+error() { >&2 echo "$(basename "$0"): failed"; }
+
+# Trap errors
+trap error EXIT
+
+# Assert that the QEMUSH_NAME variable is not null
 [ -n "$QEMUSH_NAME" ]
+
+# Release the trap
+trap - EXIT
+
+# Print the actual string
 printf %s/%s.qcow2\\n ~/disks "$QEMUSH_NAME"

qemu/bin/sockpath

@@ -1,3 +1,16 @@
 #!/bin/sh -e
+
+# Invoked on termination if the last command failed
+error() { >&2 echo "$(basename "$0"): failed"; }
+
+# Trap errors
+trap error EXIT
+
+# Assert that the QEMUSH_NAME variable is not null
 [ -n "$QEMUSH_NAME" ]
+
+# Release the trap
+trap - EXIT
+
+# Print the actual string
 printf %s/%s ~/sockets "$QEMUSH_NAME"

qemu/launchers/kvm

@@ -1,8 +1,16 @@
 #!/usr/bin/env python3
-from os import environ
+
+# Retrieve the name of the monitor socket
+from subprocess import check_output
+from subprocess import CalledProcessError
+try:
+    socket = 'unix:%s,server,nowait' % (check_output(["sockpath"], text=True))
+except CalledProcessError as e:
+    exit(e.returncode)
 
 # Set number of vCPUs to use to the environment variable QEMUSH_NPROC or
 # half of total vCPUs installed if it fails
+from os import environ
 try:
     nproc = environ['QEMUSH_NPROC']
 except KeyError:
@@ -23,6 +31,7 @@ from sys import argv
 command = [
     'qemu-system-x86_64',
     '-enable-kvm', '-daemonize',
+    '-monitor', socket,
     '-M', 'q35',
     '-cpu', 'host', '-smp', nproc,
     '-m', ram,