We have codepaths with and without initrd, which results in different environment that systemd starts up with.
In bionic, initramfs-tools sets PATH to PATH=/sbin:/usr/sbin:/bin:/usr/bin In later releases, initramfs-tools sets PATH to PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin And systemd can come up without initrd (lxd) in which case PATH is not set at all, and internally systemd uses the built-in compiled PATH. The snapd environment generator has been fixed to handle the case of empty or unset PATH. But it only appends the snapd path, meaning that it doesn't inject /usr/local into the PATH. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1771858 Title: /snap/bin not in default PATH for units, snapd should ship system- environment-generators to inject /snap/bin into $PATH Status in snapd package in Ubuntu: Confirmed Status in systemd package in Ubuntu: Fix Released Status in snapd source package in Xenial: Confirmed Status in systemd source package in Xenial: Confirmed Status in snapd source package in Bionic: Confirmed Status in systemd source package in Bionic: Fix Committed Status in snapd source package in Cosmic: Fix Released Status in systemd source package in Cosmic: Fix Released Bug description: [Impact] * This means that software installed via snap isn't transparently available for units to use. As snaps are first-class citizens in Ubuntu, we should update the PATH. * When a generator started to be provided by systemd, it was recognized that $PATH is not correctly set, nonetheless, due to an environment bug that systemd generators run in. [Testcase] # make snapd-env-generator executable if it is not $ sudo chmod +x /usr/lib/systemd/system-environment-generators/snapd-env-generator # reboot, then test the effect of the fix $ systemd-run /usr/bin/env $ journalctl -e | grep PATH Output should contain /snap/bin Output should contain a complete and a valid PATH, i.e. PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin" or similar. [Regression Potential] * snapd generator was already fixed separately to cause no harm, when running under a broken systemd. With the corrected environment, generators will now run with a correct PATH out of the box. A slight change of PATH will be observed by all generators, when running in containers/initramfs-less boots. However most generators will not be affected as they typically do not execute external binaries. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/snapd/+bug/1771858/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
