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2015-06-15everywhere: port everything to sigprocmask_many() and friendsLennart Poettering
This ports a lot of manual code over to sigprocmask_many() and friends. Also, we now consistly check for sigprocmask() failures with assert_se(), since the call cannot realistically fail unless there's a programming error. Also encloses a few sd_event_add_signal() calls with (void) when we ignore the return values for it knowingly.
2015-06-15btrfs-util: when snapshotting make sure we don't descent into subvolumes we ↵Lennart Poettering
just created We already had a safety check in place that we don't end up descending to the original subvolume again, but we also should avoid descending in the newly created one. This is particularly important if we make a snapshot below its source, like we do in "systemd-nspawn --ephemeral -D /". Closes https://bugs.freedesktop.org/show_bug.cgi?id=90803
2015-06-11build-sys: split internal basic/ library from shared/Kay Sievers
basic/ can be used by everything cannot use anything outside of basic/ libsystemd/ can use basic/ cannot use shared/ shared/ can use libsystemd/