[Libvir] [PATCH] Fix pathological behaviour of "virsh help" (was: Re: RFC: replace "no support for hypervisor" error)

Daniel Veillard wrote: This patch fixes the pathological failure of 'virsh help command'. (1) We allow ctl->conn to be NULL, meaning "no connection". (2) All cmd* functions check vshConnectionUsability where required (I checked this) except the ones which don't need to such as cmdHelp. (3) vshInit has changed so that not being able to connect to a hypervisor is a non-fatal condition. Thus after vshInit, ctl->conn may be NULL. (4) I reordered the list of commands alphabetically, except that "help" is listed first. $ virsh help save libvir: error : operation failed: xenProxyOpen error: failed to connect to the hypervisor NAME save - save a domain state to a file SYNOPSIS save <domain> <file> DESCRIPTION Save a running domain. OPTIONS <domain> domain name, id or uuid <file> where to save the data Rich. -- Emerging Technologies, Red Hat - http://et.redhat.com/~rjones/ Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SL4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 03798903