[libvirt] [PATCH] Default to qemu:///system if accessible

[Daniel Veillard]

On Fri, Sep 03, 2010 at 03:28:58PM +0200, Soren Hansen wrote:
> If no uri is passed to one of the virConnectOpen-ish calls, libvirt
> attempts to autoprobe a sensible URI. Part of the current logic checks
> for getuid() > 0, and if that check is succesful, a libvirtd daemon is
> spawned. This patch replaces this check with a call to
> access(LIBVIRTD_PRIV_UNIX_SOCKET, W_OK) so that users with access to the
> qemu:///system UNIX socket connect to that one by default instead of
> spawning a new libvirtd daemon.
> 
> Signed-off-by: Soren Hansen <soren at linux2go.dk>
> ---
>  src/remote/remote_driver.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/src/remote/remote_driver.c b/src/remote/remote_driver.c
> index a945710..17e6ead 100644
> --- a/src/remote/remote_driver.c
> +++ b/src/remote/remote_driver.c
> @@ -1086,7 +1086,7 @@ remoteOpen (virConnectPtr conn,
>      if (!conn->uri) {
>          DEBUG0("Auto-probe remote URI");
>  #ifndef __sun
> -        if (getuid() > 0) {
> +        if (access(LIBVIRTD_PRIV_UNIX_SOCKET, W_OK)) {
>              DEBUG0("Auto-spawn user daemon instance");
>              rflags |= VIR_DRV_OPEN_REMOTE_USER;
>              if (!autostart ||

  Hum, that sounds like a change of semantic.
Before as non root you would span a local daemon, now you use the system
one. I'm not saying it's a bad thing in most cases but it's a serious
change, and we try to avoid those in general.

Daniel

-- 
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