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

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On Mon, Aug 11, 2014 at 11:13 AM, Daniel P. Berrange
<berrange@xxxxxxxxxx> wrote:
> On Tue, Aug 05, 2014 at 02:40:53AM +0000, chenhanxiao@xxxxxxxxxxxxxx wrote:
>> ping
>>
>> > -----Original Message-----
>> > From: libvir-list-bounces@xxxxxxxxxx [mailto:libvir-list-bounces@xxxxxxxxxx]
>> > On Behalf Of Chen Hanxiao
>> > Sent: Friday, July 25, 2014 2:40 PM
>> > To: libvir-list@xxxxxxxxxx
>> > Subject:  [PATCH RFC] LXC: add HOME environment variable
>> >
>> > We lacked of HOME environment variable,
>> > set 'HOME=/' as default.
>> >
>> > Signed-off-by: Chen Hanxiao <chenhanxiao@xxxxxxxxxxxxxx>
>> > ---
>> >  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.

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

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