For a longer discussion see this:
http://lists.freedesktop.org/archives/systemd-devel/2015-April/030175.html
This introduces /run/systemd/fsck.progress as a simply
AF_UNIX/SOCK_STREAM socket. If it exists and is connectable we'll
connect fsck's -c switch with it. If external programs want to get
progress data they should hence listen on this socket and will get
all they need via that socket. To get information about the connecting
fsck client they should use SO_PEERCRED.
Unless /run/systemd/fsck.progress is around and connectable this change
reverts back to v219 behaviour where we'd forward fsck output to
/dev/console on our own.
With this change, it becomes possible to order a unit to activate before any
modifications to the file systems. This is especially useful for supporting
resume from hibernation.
Without this, fsck would be re-run if any other service which pulls
in a target requiring one of the mounts was started after fsck was done
but before the initial transaction was done.
https://bugs.freedesktop.org/show_bug.cgi?id=66784
all other dependencies are in 3rd person. Change BindTo= accordingly to
BindsTo=.
Of course, the dependency is widely used, hence we parse the old name
too for compatibility.
The rule is that units that encapsulate our own code are prefixed with
"systemd-". Since the fsck units invoke our own code, hence add the
missing prefix. Since a long long time the fsck units didn't invoke the
naked fsck binaries anymore, and it is unlikely that this well ever
change. On the opposite: the code in systemd-fsck will probably get more
complex over time to handle fsck progress to plymouth forwarding.
Same for quotacheck (but not quotaon!)
Yu Watanabe