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Re: [libvirt] [PATCH RFC] LXC: add HOME environment variable



On Tue, Aug 12, 2014 at 11:21:41AM +0200, Richard Weinberger wrote:
> On Mon, Aug 11, 2014 at 11:13 AM, Daniel P. Berrange
> <berrange redhat com> wrote:
> > On Tue, Aug 05, 2014 at 02:40:53AM +0000, chenhanxiao cn fujitsu com wrote:
> >> ping
> >>
> >> > -----Original Message-----
> >> > From: libvir-list-bounces redhat com [mailto:libvir-list-bounces redhat com]
> >> > On Behalf Of Chen Hanxiao
> >> > Sent: Friday, July 25, 2014 2:40 PM
> >> > To: libvir-list redhat com
> >> > Subject: [libvirt] [PATCH RFC] LXC: add HOME environment variable
> >> >
> >> > We lacked of HOME environment variable,
> >> > set 'HOME=/' as default.
> >> >
> >> > Signed-off-by: Chen Hanxiao <chenhanxiao cn fujitsu com>
> >> > ---
> >> >  src/lxc/lxc_container.c | 1 +
> >> >  1 file changed, 1 insertion(+)
> >> >
> >> > diff --git a/src/lxc/lxc_container.c b/src/lxc/lxc_container.c
> >> > index 1cf2c8f..9df9c04 100644
> >> > --- a/src/lxc/lxc_container.c
> >> > +++ b/src/lxc/lxc_container.c
> >> > @@ -236,6 +236,7 @@ static virCommandPtr
> >> > lxcContainerBuildInitCmd(virDomainDefPtr vmDef,
> >> >      virCommandAddEnvString(cmd, "PATH=/bin:/sbin");
> >> >      virCommandAddEnvString(cmd, "TERM=linux");
> >> >      virCommandAddEnvString(cmd, "container=lxc-libvirt");
> >> > +    virCommandAddEnvString(cmd, "HOME=/");
> >> >      virCommandAddEnvPair(cmd, "container_uuid", uuidstr);
> >> >      if (nttyPaths > 1)
> >> >          virCommandAddEnvPair(cmd, "container_ttys",
> >> > virBufferCurrentContent(&buf));
> >
> > I'm curious what expects to have a $HOME env var set. I'd tend to view
> > the setting of $HOME to be something that the software in the container
> > should take care of.
> 
> The kernel sets up $HOME for the init process.
> Therefore any init can assume that $HOME is set.
> libvirt currently violates that implicit rule.

Ah ok, that makese sense then. ACK

> 
> > Setting HOME=/ in libvirt isn't a problem, I'm just curious why we need
> > it.

Regards,
Daniel
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