[systemd-devel] [PATCH] man: Add a note about what environment variables are available by default.

[Kay Sievers]

On Fri, Jul 26, 2013 at 11:57 AM, Kay Sievers <kay at vrfy.org> wrote:
> On Fri, Jul 26, 2013 at 11:21 AM, Colin Guthrie <colin at mageia.org> wrote:
>> This question was asked by a user trying to debug a problem with Java services
>> which required JAVA_HOME to be set.
>> ---
>>  man/systemd.exec.xml | 7 +++++++
>>  1 file changed, 7 insertions(+)
>>
>> diff --git a/man/systemd.exec.xml b/man/systemd.exec.xml
>> index c0e1d86..b78f255 100644
>> --- a/man/systemd.exec.xml
>> +++ b/man/systemd.exec.xml
>> @@ -77,6 +77,13 @@
>>                  configuration options are configured in the [Service],
>>                  [Socket], [Mount], or [Swap] sections, depending on the unit
>>                  type.</para>
>> +
>> +                <para>All processes are executed in a clean environment in
>> +                which only the TERM, PATH, USER, and HOME variables are set
>> +                by default.
>
> They are just preserved, passed-along, not exported or set by default, isn't it?

Seems for the system services, only PATH= and the locale are usually set:

$ sudo cat /proc/$(pidof systemd-logind)/environ
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/binLANG=en_US.UTF-8LC_TIME=de_DE.UTF-8LC_PAPER=de_DE.UTF-8LC_MEASUREMENT=de_DE.UTF-8

Kay