Re: [systemd-devel] Environment File Question
On Mo, 18.12.17 23:22, Boyce, Kevin P [US] (AS) (kevin.bo...@ngc.com) wrote: > Good Day List, > > This may be a noob question but I'm trying to understand how systemd works > with environment variables for system services in one place. Reading various > sites and systemd documentation only seems to be confusing me at this point. > > When I set in /etc/systemd/system.conf > DefaultEnvironment="VAR1=Test" 'VAR2=TEST 2', my service reads the > variables correctly, but why are these not inherited by the user > when they login? Isn't systemd the parent of all processes and > shouldn't that environment I specify be preserved? This depends on how the program the puts together the login environment does it, i.e. sshd, login, gdm, whatever it is. More often than not they tend to clean up the environment block fully. > Further, what if I need expansion of these variables like > DefaultEnvironment="VAR1=$(readlink -f /path/to/symlink)" to work > also which complicates things. /etc/environment does not do this. You could use "systemctl set-environment" to set env vars to be inherited by system services programmatically. But of course, be careful to not introduce races. Lennart -- Lennart Poettering, Red Hat ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/systemd-devel
Re: [systemd-devel] Environment File Question
19.12.2017 02:22, Boyce, Kevin P [US] (AS) пишет: > Good Day List, > > This may be a noob question but I'm trying to understand how systemd works > with environment variables for system services in one place. Reading various > sites and systemd documentation only seems to be confusing me at this point. > > When I set in /etc/systemd/system.conf DefaultEnvironment="VAR1=Test" > 'VAR2=TEST 2', my service reads the variables correctly, but why are these > not inherited by the user when they login? /bin/login will initialize environment unless called with "-p" option. ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/systemd-devel
[systemd-devel] Environment File Question
Good Day List, This may be a noob question but I'm trying to understand how systemd works with environment variables for system services in one place. Reading various sites and systemd documentation only seems to be confusing me at this point. When I set in /etc/systemd/system.conf DefaultEnvironment="VAR1=Test" 'VAR2=TEST 2', my service reads the variables correctly, but why are these not inherited by the user when they login? Isn't systemd the parent of all processes and shouldn't that environment I specify be preserved? Further, what if I need expansion of these variables like DefaultEnvironment="VAR1=$(readlink -f /path/to/symlink)" to work also which complicates things. /etc/environment does not do this. On RHEL7 we don't have the system-environment-generator available as it was released in systemd v.233 I think. RHEL has v219. Thanks, Kevin ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/systemd-devel
