add check vm exist

Signed-off-by: GnomeZworc <nicolas.boufidjeline@g3e.fr>

lib/qemu.sh

@@ -4,6 +4,17 @@
 . ./lib/colors.sh
 . ./lib/db.sh
 
+function check_qemu_exist {
+    local vm_name="${1}"
+
+    print_in_color "${COLOR_GREY}" "Check in db if ${vm_name} exist"
+    check_in_db "vm" "${vm_name}"
+    [ "$?" -eq "0" ] || return 1
+    ps aux | grep -v grep | grep "${vm_name}" > /dev/null || return 1
+    return 0
+
+}
+
 function create_tap {
     local tap_id="${1}"
     local bridge_name="${2}"