348010ac93
While the virsh option definitions specify (either explicitly after
recent refactors, or implicitly before) whether an argument is
positional or not, the actual parser is way more lax and actually and
allows also arguments which were considered/documented as non-positional
to be filled positionally unless VSH_OFLAG_REQ_OPT is used in the flags.
This creates situations such as 'snapshot-create-as' which has the
following docs:
SYNOPSIS
snapshot-create-as <domain> [--name <string>] [--description <string>]
[--print-xml] [--no-metadata] [--halt] [--disk-only]
[--reuse-external] [--quiesce] [--atomic] [--live] [--validate]
[--memspec <string>] [[--diskspec] <string>]...
Thus showing as if '--name' and '--description' required the option, but
in fact the following happens when only positionals are passed:
$ virsh snapshot-create-as --print-xml 1 2 3 4 5
<domainsnapshot>
<name>2</name>
<description>3</description>
<disks>
<disk name='4'/>
<disk name='5'/>
</disks>
</domainsnapshot>
In the above example e.g. '--memspec' is not populated.
This disconnect makes it impossible to refactor the parser itself and
allows users to write buggy interactions with virsh.
In order to address this we'll be annotating every single of these
unwanted positional options as such so that this doesn't happen in the
future, while still preserving the quirk in the parser.
This patch introduces a tool which outputs list of options which are not
marked as positional but are lacking the VSH_OFLAG_REQ_OPT flag.
This tool will be removed once all the offenders found by it will be
addressed.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Libvirt API for virtualization
Libvirt provides a portable, long term stable C API for managing the virtualization technologies provided by many operating systems. It includes support for QEMU, KVM, Xen, LXC, bhyve, Virtuozzo, VMware vCenter and ESX, VMware Desktop, Hyper-V, VirtualBox and the POWER Hypervisor.
For some of these hypervisors, it provides a stateful management daemon which runs on the virtualization host allowing access to the API both by non-privileged local users and remote users.
Layered packages provide bindings of the libvirt C API into other languages including Python, Perl, PHP, Go, Java, OCaml, as well as mappings into object systems such as GObject, CIM and SNMP.
Further information about the libvirt project can be found on the website:
License
The libvirt C API is distributed under the terms of GNU Lesser General Public License, version 2.1 (or later). Some parts of the code that are not part of the C library may have the more restrictive GNU General Public License, version 2.0 (or later). See the files COPYING.LESSER and COPYING for full license terms & conditions.
Installation
Instructions on building and installing libvirt can be found on the website:
https://libvirt.org/compiling.html
Contributing
The libvirt project welcomes contributions in many ways. For most components the best way to contribute is to send patches to the primary development mailing list. Further guidance on this can be found on the website:
https://libvirt.org/contribute.html
Contact
The libvirt project has two primary mailing lists:
- users@lists.libvirt.org (for user discussions)
- devel@lists.libvirt.org (for development only)
Further details on contacting the project are available on the website: