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This PR expands the "Bootup and Shutdown" module’s systemd support with creation and management for services, timers, sockets, paths and targets. It also adds user-scoped systemd units, linger controls, status and log actions, tabbed unit listings by type, and contextual help for the new options. For user-scoped units, the implementation includes several safety guards because unit files live under user-controlled home directories: - User accounts are validated with system account data before any user-unit operation is attempted. - User unit names are restricted to known systemd unit suffixes and safe filename characters. - User unit files are limited to direct children of `~/.config/systemd/user`. - Symlinked `.config`, `.config/systemd`, and `.config/systemd/user` paths are rejected. - User unit reads, writes, directory creation, and deletes are performed after dropping privileges to the target Unix user. - File operations re-check paths close to the actual read/write/delete operation to reduce symlink race exposure. - User unit create failures roll back half-created files when daemon reload fails. - User-provided unit names, owners, paths, command output, and logs are HTML-escaped before display. - systemctl, journalctl, and loginctl command arguments are shell-quoted before execution. - User services omit `User=` and `Group=` directives because they already run under the selected user’s systemd manager. Together, all these changes will allow Webmin admin to manage both system and user systemd units while keeping user-controlled home-directory paths from becoming root-level file read/write/delete exploits. Implemented in response to these two issue requests https://github.com/webmin/webmin/issues/2733 and https://github.com/webmin/webmin/issues/2734
9 lines
495 B
HTML
9 lines
495 B
HTML
<header>Install target</header>
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<p>The target that should want this unit when it is enabled. This writes
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<tt>WantedBy=</tt> in the <tt>[Install]</tt> section.</p>
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<p>For system services, <tt>multi-user.target</tt> is the usual default. For
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user service units, <tt>default.target</tt> is normally used so the service starts
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with the user's default manager target. Timers, sockets, and paths usually use
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<tt>timers.target</tt>, <tt>sockets.target</tt>, and <tt>paths.target</tt>
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respectively.</p>
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