f2ada831e4
Currently, we mount via file descriptors using /proc/self/fd. This works, but it means that in /proc/mounts and various other files, the source of the mount will be listed as /proc/self/fd/xxx. For other software that parses these files, /proc/self/fd/xxx doesn't mean anything, or worse, it means the completely wrong thing, as it will refer to one of their own file descriptors instead. Let's improve the situation by using /proc/pid/fd instead. This allows processes parsing /proc/mounts to do the right thing more often than not. One scenario where even this doesn't work if when containers are involved, as with the pid namespace unshared, even /proc/pid/fd will mean the wrong thing, but it's no worse than /proc/self/fd which will always means the wrong thing. This also doesn't work if we mount via file descriptor and then exit, as the pid will be gone, but it does work as long as the process that did the mount is alive, which makes it useful for systemd-dissect --with for example if the program we run in the image wants to parse /proc/mounts. (cherry picked from commit 4419735822d72744dad1c76a57463561b332897a) (cherry picked from commit 8046167dc2d6d7ad62a447991efcd0404d784180) (cherry picked from commit edf4a86f3db44ae6c1dde2af711ffec5d9e51238)
System and Service Manager
Details
Most documentation is available on systemd's web site.
Assorted, older, general information about systemd can be found in the systemd Wiki.
Information about build requirements is provided in the README file.
Consult our NEWS file for information about what's new in the most recent systemd versions.
Please see the Code Map for information about this repository's layout and content.
Please see the Hacking guide for information on how to hack on systemd and test your modifications.
Please see our Contribution Guidelines for more information about filing GitHub Issues and posting GitHub Pull Requests.
When preparing patches for systemd, please follow our Coding Style Guidelines.
If you are looking for support, please contact our mailing list or join our IRC channel.
Stable branches with backported patches are available in the stable repo.