From b750101eb236130cf056c675997decbac904cc49 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 17:35:18 +0200 Subject: Adding upstream version 252.22. Signed-off-by: Daniel Baumann --- man/environment.d.xml | 133 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 133 insertions(+) create mode 100644 man/environment.d.xml (limited to 'man/environment.d.xml') diff --git a/man/environment.d.xml b/man/environment.d.xml new file mode 100644 index 0000000..fc03405 --- /dev/null +++ b/man/environment.d.xml @@ -0,0 +1,133 @@ + + + + + + + + environment.d + systemd + + + + environment.d + 5 + + + + environment.d + Definition of user service environment + + + + ~/.config/environment.d/*.conf + /etc/environment.d/*.conf + /run/environment.d/*.conf + /usr/lib/environment.d/*.conf + /etc/environment + + + + Description + + Configuration files in the environment.d/ directories contain lists of + environment variable assignments passed to services started by the systemd user instance. + systemd-environment-d-generator8 + parses them and updates the environment exported by the systemd user instance. See below for an + discussion of which processes inherit those variables. + + It is recommended to use numerical prefixes for file names to simplify ordering. + + For backwards compatibility, a symlink to /etc/environment is + installed, so this file is also parsed. + + + + + + Configuration Format + + The configuration files contain a list of + KEY=VALUE environment + variable assignments, separated by newlines. The right hand side of these assignments may + reference previously defined environment variables, using the ${OTHER_KEY} + and $OTHER_KEY format. It is also possible to use + ${FOO:-DEFAULT_VALUE} + to expand in the same way as ${FOO} unless the + expansion would be empty, in which case it expands to DEFAULT_VALUE, + and use + ${FOO:+ALTERNATE_VALUE} + to expand to ALTERNATE_VALUE as long as + ${FOO} would have expanded to a non-empty value. + No other elements of shell syntax are supported. + + Each KEY must be a valid variable name. Empty lines + and lines beginning with the comment character # are ignored. + + + Example + + Setup environment to allow access to a program installed in + <filename index="false">/opt/foo</filename> + + /etc/environment.d/60-foo.conf: + + + FOO_DEBUG=force-software-gl,log-verbose + PATH=/opt/foo/bin:$PATH + LD_LIBRARY_PATH=/opt/foo/lib${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH} + XDG_DATA_DIRS=/opt/foo/share:${XDG_DATA_DIRS:-/usr/local/share/:/usr/share/} + + + + + + + Applicability + + Environment variables exported by the user service manager (systemd --user + instance started in the user@uid.service system service) + are passed to any services started by that service manager. In particular, this may include services + which run user shells. For example in the GNOME environment, the graphical terminal emulator runs as the + gnome-terminal-server.service user unit, which in turn runs the user shell, so that + shell will inherit environment variables exported by the user manager. For other instances of the shell, + not launched by the user service manager, the environment they inherit is defined by the program that + starts them. Hint: in general, + systemd.service5 units + contain programs launched by systemd, and + systemd.scope5 units + contain programs launched by something else. + + Note that these files do not affect the environment block of the service manager itself, but + exclusively the environment blocks passed to the services it manages. Environment variables set that way + thus cannot be used to influence behaviour of the service manager. In order to make changes to the + service manager's environment block the environment must be modified before the user's service manager is + invoked, for example from the system service manager or via a PAM module. + + Specifically, for ssh logins, the + sshd8 + service builds an environment that is a combination of variables forwarded from the remote system and + defined by sshd, see the discussion in + ssh1. + A graphical display session will have an analogous mechanism to define the environment. Note that some + managers query the systemd user instance for the exported environment and inject this configuration into + programs they start, using systemctl show-environment or the underlying D-Bus call. + + + + + See Also + + systemd1, + systemd-environment-d-generator8, + systemd.environment-generator7 + + + + -- cgit v1.2.3