contrib/initramfs: switch to automake

Use automake to build initramfs scripts and hooks.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: loli10K <ezomori.nozomu@gmail.com>
Closes #6761

configure.ac

@@ -122,6 +122,9 @@ AC_CONFIG_FILES([
 	contrib/dracut/02zfsexpandknowledge/Makefile
 	contrib/dracut/90zfs/Makefile
 	contrib/initramfs/Makefile
+	contrib/initramfs/hooks/Makefile
+	contrib/initramfs/scripts/Makefile
+	contrib/initramfs/scripts/local-top/Makefile
 	module/Makefile
 	module/avl/Makefile
 	module/nvpair/Makefile

contrib/initramfs/Makefile.am

@@ -2,11 +2,10 @@ initrddir = $(datarootdir)/initramfs-tools
 
 initrd_SCRIPTS = conf-hooks.d/zfs hooks/zfs scripts/zfs scripts/local-top/zfs
 
+SUBDIRS = hooks scripts
+
 EXTRA_DIST = \
 	$(top_srcdir)/contrib/initramfs/conf-hooks.d/zfs \
-	$(top_srcdir)/contrib/initramfs/hooks/zfs \
-	$(top_srcdir)/contrib/initramfs/scripts/zfs \
-	$(top_srcdir)/contrib/initramfs/scripts/local-top/zfs \
 	$(top_srcdir)/contrib/initramfs/README.initramfs.markdown
 
 install-initrdSCRIPTS: $(EXTRA_DIST)

contrib/initramfs/hooks/.gitignore

@@ -0,0 +1 @@
+zfs

contrib/initramfs/hooks/Makefile.am

@@ -0,0 +1,20 @@
+hooksdir = $(datarootdir)/initramfs-tools/hooks
+
+hooks_SCRIPTS = \
+	zfs
+
+EXTRA_DIST = \
+	$(top_srcdir)/contrib/initramfs/hooks/zfs.in
+
+$(hooks_SCRIPTS):%:%.in
+	-$(SED) -e 's,@sbindir\@,$(sbindir),g' \
+		-e 's,@sysconfdir\@,$(sysconfdir),g' \
+		-e 's,@udevdir\@,$(udevdir),g' \
+		-e 's,@udevruledir\@,$(udevruledir),g' \
+		$< >'$@'
+
+clean-local::
+	-$(RM) $(hooks_SCRIPTS)
+
+distclean-local::
+	-$(RM) $(hooks_SCRIPTS)

contrib/initramfs/hooks/zfs.in

@@ -8,14 +8,18 @@ PREREQ="zdev"
 
 # These prerequisites are provided by the zfsutils package. The zdb utility is
 # not strictly required, but it can be useful at the initramfs recovery prompt.
-COPY_EXEC_LIST="/sbin/zdb /sbin/zpool /sbin/zfs /sbin/mount.zfs"
-COPY_EXEC_LIST="$COPY_EXEC_LIST /usr/bin/dirname /lib/udev/vdev_id"
-COPY_FILE_LIST="/etc/hostid /etc/zfs/zpool.cache /etc/default/zfs"
-COPY_FILE_LIST="$COPY_FILE_LIST /etc/zfs/zfs-functions /etc/zfs/vdev_id.conf"
-COPY_FILE_LIST="$COPY_FILE_LIST /lib/udev/rules.d/69-vdev.rules"
+# The mount helper mount.zfs must be installed in /sbin because this path is
+# hardcoded in the mount(8) for security reasons.
+COPY_EXEC_LIST="@sbindir@/zdb @sbindir@/zpool @sbindir@/zfs /sbin/mount.zfs"
+COPY_EXEC_LIST="$COPY_EXEC_LIST @udevdir@/vdev_id"
+COPY_FILE_LIST="/etc/hostid @sysconfdir@/zfs/zpool.cache"
+COPY_FILE_LIST="$COPY_FILE_LIST @sysconfdir@/default/zfs"
+COPY_FILE_LIST="$COPY_FILE_LIST @sysconfdir@/zfs/zfs-functions"
+COPY_FILE_LIST="$COPY_FILE_LIST @sysconfdir@/zfs/vdev_id.conf"
+COPY_FILE_LIST="$COPY_FILE_LIST @udevruledir@/69-vdev.rules"
 
 # These prerequisites are provided by the base system.
-COPY_EXEC_LIST="$COPY_EXEC_LIST /bin/hostname /sbin/blkid"
+COPY_EXEC_LIST="$COPY_EXEC_LIST /usr/bin/dirname /bin/hostname /sbin/blkid"
 
 # Explicitly specify all kernel modules because automatic dependency resolution
 # is unreliable on many systems.
@@ -82,7 +86,7 @@ else
 fi
 
 for ii in zfs zfs.conf spl spl.conf
-do  
+do
 	if [ -f "/etc/modprobe.d/$ii" ]; then
 		if [ ! -d "$DESTDIR/etc/modprobe.d" ]; then
 			mkdir -p $DESTDIR/etc/modprobe.d

contrib/initramfs/scripts/.gitignore

@@ -0,0 +1 @@
+zfs

contrib/initramfs/scripts/Makefile.am

@@ -0,0 +1,20 @@
+scriptsdir = $(datarootdir)/initramfs-tools/scripts
+
+scripts_SCRIPTS = \
+	zfs
+
+SUBDIRS = local-top
+
+EXTRA_DIST = \
+	$(top_srcdir)/contrib/initramfs/scripts/zfs.in
+
+$(scripts_SCRIPTS):%:%.in
+	-$(SED) -e 's,@sbindir\@,$(sbindir),g' \
+		-e 's,@sysconfdir\@,$(sysconfdir),g' \
+		$< >'$@'
+
+clean-local::
+	-$(RM) $(scripts_SCRIPTS)
+
+distclean-local::
+	-$(RM) $(scripts_SCRIPTS)

contrib/initramfs/scripts/local-top/Makefile.am

@@ -0,0 +1,3 @@
+localtopdir = $(datarootdir)/initramfs-tools/scripts/local-top
+
+EXTRA_DIST = zfs

contrib/initramfs/scripts/zfs.in

@@ -11,9 +11,9 @@
 
 # Paths to what we need - in the initrd, these paths are hardcoded,
 # so override the defines in zfs-functions.
-ZFS="/sbin/zfs"
-ZPOOL="/sbin/zpool"
-ZPOOL_CACHE="/etc/zfs/zpool.cache"
+ZFS="@sbindir@/zfs"
+ZPOOL="@sbindir@/zpool"
+ZPOOL_CACHE="@sysconfdir@/zfs/zpool.cache"
 export ZFS ZPOOL ZPOOL_CACHE
 
 # This runs any scripts that should run before we start importing
@@ -610,7 +610,7 @@ setup_snapshot_booting()
 	# Separate the full snapshot ('$snap') into it's filesystem and
 	# snapshot names. Would have been nice with a split() function..
 	rootfs="${snap%%@*}"
-	snapname="${snap##*@}"	
+	snapname="${snap##*@}"
 	ZFS_BOOTFS="${rootfs}_${snapname}"
 
 	if ! grep -qiE '(^|[^\\](\\\\)* )(rollback)=(on|yes|1)( |$)' /proc/cmdline