units: rework systemd-random-seed-{load,save}.service to be a single service

That way ordering it with MountsRequiredFor= works properly, as this no
longer results in mount units start requests to be added to the shutdown
transaction that conflict with stop requests for the same unit.

Makefile-man.am

@@ -667,16 +667,11 @@ endif
 
 if ENABLE_RANDOMSEED
 MANPAGES += \
-	man/systemd-random-seed-load.service.8
+	man/systemd-random-seed.service.8
 MANPAGES_ALIAS += \
-	man/systemd-random-seed-save.service.8 \
 	man/systemd-random-seed.8
-man/systemd-random-seed-save.service.8: man/systemd-random-seed-load.service.8
+man/systemd-random-seed.8: man/systemd-random-seed.service.8
-man/systemd-random-seed.8: man/systemd-random-seed-load.service.8
+man/systemd-random-seed.html: man/systemd-random-seed.service.html
-man/systemd-random-seed-save.service.html: man/systemd-random-seed-load.service.html
-	$(html-alias)
-
-man/systemd-random-seed.html: man/systemd-random-seed-load.service.html
 	$(html-alias)
 
 endif

Makefile.am

@@ -3162,8 +3162,7 @@ rootlibexec_PROGRAMS += \
 	systemd-random-seed
 
 nodist_systemunit_DATA += \
-	units/systemd-random-seed-save.service \
+	units/systemd-random-seed.service
-	units/systemd-random-seed-load.service
 
 systemd_random_seed_SOURCES = \
 	src/random-seed/random-seed.c
@@ -3172,16 +3171,13 @@ systemd_random_seed_LDADD = \
 	libsystemd-label.la \
 	libsystemd-shared.la
 
-SHUTDOWN_TARGET_WANTS += \
-	systemd-random-seed-save.service
 SYSINIT_TARGET_WANTS += \
-	systemd-random-seed-load.service
+	systemd-random-seed.service
 
 endif
 
 EXTRA_DIST += \
-	units/systemd-random-seed-save.service.in \
+	units/systemd-random-seed.service.in
-	units/systemd-random-seed-load.service.in
 
 # ------------------------------------------------------------------------------
 if HAVE_LIBCRYPTSETUP

man/systemd-random-seed.service.xml

@@ -19,10 +19,10 @@
   You should have received a copy of the GNU Lesser General Public License
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 -->
-<refentry id="systemd-random-seed-load.service" conditional='ENABLE_RANDOMSEED'>
+<refentry id="systemd-random-seed.service" conditional='ENABLE_RANDOMSEED'>
 
         <refentryinfo>
-                <title>systemd-random-seed-load.service</title>
+                <title>systemd-random-seed.service</title>
                 <productname>systemd</productname>
 
                 <authorgroup>
@@ -36,32 +36,27 @@
         </refentryinfo>
 
         <refmeta>
-                <refentrytitle>systemd-random-seed-load.service</refentrytitle>
+                <refentrytitle>systemd-random-seed.service</refentrytitle>
                 <manvolnum>8</manvolnum>
         </refmeta>
 
         <refnamediv>
-                <refname>systemd-random-seed-load.service</refname>
+                <refname>systemd-random-seed.service</refname>
-                <refname>systemd-random-seed-save.service</refname>
                 <refname>systemd-random-seed</refname>
                 <refpurpose>Load and save the system random seed at boot and shutdown</refpurpose>
         </refnamediv>
 
         <refsynopsisdiv>
-                <para><filename>systemd-random-seed-load.service</filename></para>
+                <para><filename>systemd-random-seed.service</filename></para>
-                <para><filename>systemd-random-seed-save.service</filename></para>
                 <para><filename>/usr/lib/systemd/systemd-random-seed</filename></para>
         </refsynopsisdiv>
 
         <refsect1>
                 <title>Description</title>
 
-                <para><filename>systemd-random-seed-load.service</filename>
+                <para><filename>systemd-random-seed.service</filename>
-                is an early-boot service that restores the random seed
+                is a service that restores the random seed of the
-                of the
+                system at early-boot and saves it at shutdown. See
-                system. <filename>systemd-random-seed-save.service</filename>
-                is a late-shutdown service that saves the random seed
-                of the system. See
                 <citerefentry><refentrytitle>random</refentrytitle><manvolnum>4</manvolnum></citerefentry>
                 for details. Saving/restoring the random seed across
                 boots increases the amount of available entropy early

units/.gitignore

@@ -41,8 +41,7 @@
 /systemd-remount-fs.service
 /systemd-vconsole-setup.service
 /systemd-shutdownd.service
-/systemd-random-seed-load.service
+/systemd-random-seed.service
-/systemd-random-seed-save.service
 /systemd-initctl.service
 /getty@.service
 /systemd-update-utmp-runlevel.service

units/systemd-random-seed-save.service.in

@@ -1,18 +0,0 @@
-#  This file is part of systemd.
-#
-#  systemd is free software; you can redistribute it and/or modify it
-#  under the terms of the GNU Lesser General Public License as published by
-#  the Free Software Foundation; either version 2.1 of the License, or
-#  (at your option) any later version.
-
-[Unit]
-Description=Save Random Seed
-Documentation=man:systemd-random-seed-load.service(8) man:random(4)
-DefaultDependencies=no
-RequiresMountsFor=@RANDOM_SEED@
-After=systemd-remount-fs.service systemd-random-seed-load.service
-Before=final.target
-
-[Service]
-Type=oneshot
-ExecStart=@rootlibexecdir@/systemd-random-seed save

units/systemd-random-seed.service.in

@@ -6,13 +6,16 @@
 #  (at your option) any later version.
 
 [Unit]
-Description=Load Random Seed
+Description=Load/Save Random Seed
 Documentation=man:systemd-random-seed-load.service(8) man:random(4)
 DefaultDependencies=no
 RequiresMountsFor=@RANDOM_SEED@
+Conflicts=shutdown.target
 After=systemd-readahead-collect.service systemd-readahead-replay.service systemd-remount-fs.service
-Before=sysinit.target final.target
+Before=sysinit.target shutdown.target
 
 [Service]
 Type=oneshot
+RemainAfterExit=yes
 ExecStart=@rootlibexecdir@/systemd-random-seed load
+ExecStop=@rootlibexecdir@/systemd-random-seed save

units/systemd-tmpfiles-setup.service.in

@@ -10,6 +10,7 @@ Description=Recreate Volatile Files and Directories
 Documentation=man:tmpfiles.d(5) man:systemd-tmpfiles(8)
 DefaultDependencies=no
 Wants=local-fs.target
+Conflicts=shutdown.target
 After=systemd-readahead-collect.service systemd-readahead-replay.service local-fs.target
 Before=sysinit.target shutdown.target
 ConditionDirectoryNotEmpty=|/usr/lib/tmpfiles.d