Re: [libvirt] [PATCHv2] xml: print uuids or shell-escaped names in the warning

On Thu, Oct 25, 2012 at 16:37:37 +0200, Ján Tomko wrote: > In the XML warning, this prints uuids for domain names with special > characters in them and shell-escaped names for other elements (like > snapshosts and networks) with special names. > --- > When saving snapshots, the domain name is appended to the > "snapshot-edit" command, so using a domain name that needs escaping > would lead to something that can't be just fed to the shell as it would > glue them together. > > diff to xml: shell-escape domain name in comment: > - Domain names don't get escaped, UUIDs are preferred. > - The command gets escaped too. > > diff to v1: don't try to use CDATA (it doesn't belong there) > --- > src/conf/domain_conf.c | 6 +++- > src/libvirt_private.syms | 2 + > src/qemu/qemu_domain.c | 3 +- > src/util/buf.c | 66 ++++++++++++++++++++++++++++++++++++++++++++++ > src/util/buf.h | 1 + > src/util/xml.c | 62 ++++++++++++++++++++++--------------------- > src/util/xml.h | 1 + > 7 files changed, 109 insertions(+), 32 deletions(-) I think we're making this too complicated for no real benefit. The goal is to provide a hint to anyone who looks at the autogenerated XML files and IMHO providing an escaped string (that would only work in environments for which it was designed). I would just keep it simple: - emit "virsh command name" in case name is nice - emit "virsh command uuid" in case name is ugly and uuid is known - emit "virsh command" in all other cases

This should keep the hints in domain and network XML files in /etc/libvirt usable for copy&paste (the UUID fallback works there). Snapshot files (located in /var/lib/libvirt) use "virsh snapshot-edit domain snapshot", where domains are passed as part of the command and snapshots have no UUIDs. Thus to keep the code simple, I'd emit just "virsh snapshot-edit", which is still a useful hint and I don't believe we need to do anything beyond that.