qemu: command: escape commas in VM name

This isn't sufficient on its own, since the VM name is used for things
like monitor paths, which we don't escape yet

src/qemu/qemu_command.c

@@ -6867,7 +6867,7 @@ qemuBuildNameCommandLine(virCommandPtr cmd,
 
     virCommandAddArg(cmd, "-name");
 
-    virBufferAsprintf(&buf, "%s", def->name);
+    qemuBufferEscapeComma(&buf, def->name);
 
     if (cfg->setProcessName &&
         virQEMUCapsGet(qemuCaps, QEMU_CAPS_NAME_PROCESS))

tests/qemuxml2argvdata/qemuxml2argv-name-escape.args

+LC_ALL=C \
+PATH=/bin \
+HOME=/home/test \
+USER=test \
+LOGNAME=test \
+QEMU_AUDIO_DRV=none \
+/usr/bin/qemu \
+-name foo,,bar,debug-threads=on \
+-S \
+-object secret,id=masterKey0,format=raw,file=/tmp/lib/domain--1-foo,\
+bar/master-key.aes \
+-M pc \
+-m 214 \
+-smp 1 \
+-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
+-nographic \
+-nodefaults \
+-chardev socket,id=charmonitor,path=/tmp/lib/domain--1-foo,bar/monitor.sock,\
+server,nowait \
+-mon chardev=charmonitor,id=monitor,mode=readline \
+-no-acpi \
+-boot c \
+-usb \
+-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3

tests/qemuxml2argvdata/qemuxml2argv-name-escape.xml

+<domain type='qemu'>
+  <name>foo,bar</name>
+  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+  <memory unit='KiB'>219100</memory>
+  <currentMemory unit='KiB'>219100</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os>
+    <type arch='i686' machine='pc'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu</emulator>
+  </devices>
+</domain>

tests/qemuxml2argvtest.c

@@ -1902,6 +1902,8 @@ mymain(void)
                               VIR_DOMAIN_DEF_PARSE_SKIP_OSTYPE_CHECKS,
                               NONE);
 
+    DO_TEST("name-escape", QEMU_CAPS_NAME_DEBUG_THREADS,
+            QEMU_CAPS_OBJECT_SECRET, QEMU_CAPS_CHARDEV);
     DO_TEST("debug-threads", QEMU_CAPS_NAME_DEBUG_THREADS);
 
     DO_TEST("master-key", QEMU_CAPS_OBJECT_SECRET);