37 lines
1.2 KiB
Markdown
37 lines
1.2 KiB
Markdown
[[!meta title="About init dependencies"]]
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As i started to hack on [cinit](http://unix.schottelius.org/cinit/) again,
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I tried to get it running on Debian in a VM.
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I took the old configuration from my last computer and tried to boot
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with cinit, which failed, because the udev stuff changed.
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So I added a udev service, which uses /etc/init.d/udev for switching on.
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After booting the VM, I recognized, that the service
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***mount/proc*** (which mounts /proc...) fails. Mount claims that
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/proc it is already mounted!
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This is caused by the udev script, which contains:
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237 [ -d /proc/1 ] || mount -n /proc
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Besides the problematic of using a sys-v-init script with an
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intelligent init system, it's interesting to see, **why**
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this happens:
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The service mount/root needs the device files in /dev
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to be able to run mount/root/fsck (the filesystem check).
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Thus mount/root requires the service udev to be started before.
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The service mount/proc needs the root filesystems writable,
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to write into /etc/mtab and thus needs mount/root.
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This also demonstrates the problematic of the historical grown
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init scripts, which do way more than one job and their lack of
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real dependencies.
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[[!tag unix]]
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