Re: [Qemu-devel] [PATCH] Allow default network type to be determined from an environmental variable

[Paul Brook]

> In the absence of a global configuration file, a reasonably sane way to
> support this configuration system wide is to use an environmental
> variable.  QEMU already uses a number of global variables for
> configuring audio options.

I'd really prefer we didn't do this, and preferably obsoleted/removed the 
existing environment variables.  IMHO using environment variables is a really 
bad idea and should be avoided wherever possible.

Environment variables are about the worst user interface I can think of. For a 
start they're a global resource, which is limited on some systems.
It's also extremely hard to determine what environment a user is running. This 
makes reproducing user bugs somewhere between hard and impossible.

Paul