1. test-fstab-generator: fix inverted /mnt symlink guard The test-18-options.fstab.input scenario was guarded by a check that was always true on a normal system, so it was silently skipped and its fixtures had drifted out of sync with actual generator output. This commit fixes the guard and repairs the stale fixtures it exposed. 2. fstab-generator: support for x-systemd.onfailure Add support for the x-systemd.onfailure= fstab option in systemd-fstab-generator. This allows configuring OnFailure= dependencies for generated mount units directly through /etc/fstab. For example: /dev/sda1 /data ext4 defaults,x-systemd.onfailure=emergency.target 0 2 results in the generated mount unit containing: [Unit] OnFailure=emergency.target This makes it possible to attach recovery targets or services to mount failures directly from fstab configuration. Add documentation and generator tests.
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