etc/init.d: decide which variant to use at build time.

Let Debian use the sysv-rc variant of the script, even when OpenRC is
installed. Unlike on Gentoo, OpenRC on Debian consumes both the
sysv-rc scripts and OpenRC ones. ZFS initscripts on Debian should be
the sysv-rc version to provide most compatibility and to integrate
with the rest of initscripts for dependency tracking.

Restrict the substitution in the Makefile to the dedicated list.

This construct is inspired by Mo Zhou's detection of the execution
shell and follows the strategy of Peter in 6ef28c526ba7.

As of 2024, the initscripts are mostly relevant on Debian, Gentoo and
their derivatives.

Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: Benda Xu <[email protected]>
Issue #8063
Issue #8204
Issue #8359
Closes #15977

8 files changed, 14 insertions, 13 deletions

diff --git a/config/Substfiles.am b/config/Substfiles.am
index 809eaef23..2459637ab 100644
--- a/config/Substfiles.am
+++ b/config/Substfiles.am
@@ -18,6 +18,7 @@ subst_sed_cmd = \
 	-e 's|@ASAN_ENABLED[@]|$(ASAN_ENABLED)|g' \
 	-e 's|@DEFAULT_INIT_NFS_SERVER[@]|$(DEFAULT_INIT_NFS_SERVER)|g' \
 	-e 's|@DEFAULT_INIT_SHELL[@]|$(DEFAULT_INIT_SHELL)|g' \
+	-e 's|@IS_SYSV_RC[@]|$(IS_SYSV_RC)|g' \
 	-e 's|@LIBFETCH_DYNAMIC[@]|$(LIBFETCH_DYNAMIC)|g' \
 	-e 's|@LIBFETCH_SONAME[@]|$(LIBFETCH_SONAME)|g' \
 	-e 's|@PYTHON[@]|$(PYTHON)|g' \
diff --git a/config/zfs-build.m4 b/config/zfs-build.m4
index 5f36569fe..bb5a85d81 100644
--- a/config/zfs-build.m4
+++ b/config/zfs-build.m4
@@ -578,13 +578,15 @@ AC_DEFUN([ZFS_AC_DEFAULT_PACKAGE], [
 
 	AC_MSG_CHECKING([default shell])
 	case "$VENDOR" in
-		gentoo)     DEFAULT_INIT_SHELL="/sbin/openrc-run";;
-		alpine)     DEFAULT_INIT_SHELL="/sbin/openrc-run";;
-		*)          DEFAULT_INIT_SHELL="/bin/sh"         ;;
+		gentoo|alpine)	DEFAULT_INIT_SHELL=/sbin/openrc-run
+				IS_SYSV_RC=false	;;
+		*)		DEFAULT_INIT_SHELL=/bin/sh
+				IS_SYSV_RC=true		;;
 	esac
 
 	AC_MSG_RESULT([$DEFAULT_INIT_SHELL])
 	AC_SUBST(DEFAULT_INIT_SHELL)
+	AC_SUBST(IS_SYSV_RC)
 
 	AC_MSG_CHECKING([default nfs server init script])
 	AS_IF([test "$VENDOR" = "debian"],
diff --git a/etc/init.d/README.md b/etc/init.d/README.md
index 2de05042c..da780fdc1 100644
--- a/etc/init.d/README.md
+++ b/etc/init.d/README.md
@@ -7,11 +7,7 @@ DESCRIPTION
 
   They have been tested successfully on:
 
-    * Debian GNU/Linux Wheezy
-    * Debian GNU/Linux Jessie
-    * Ubuntu Trusty
-    * CentOS 6.0
-    * CentOS 6.6
+    * Debian GNU/Linux Bookworm
     * Gentoo
 
 SUPPORT
diff --git a/etc/init.d/zfs-import.in b/etc/init.d/zfs-import.in
index a9a0604f8..ff169eb96 100755
--- a/etc/init.d/zfs-import.in
+++ b/etc/init.d/zfs-import.in
@@ -307,7 +307,7 @@ do_start()
 
 # ----------------------------------------------------
 
-if [ ! -e /sbin/openrc-run ]
+if @IS_SYSV_RC@
 then
 	case "$1" in
 		start)
diff --git a/etc/init.d/zfs-load-key.in b/etc/init.d/zfs-load-key.in
index 53c7766b7..27dfeeb0b 100755
--- a/etc/init.d/zfs-load-key.in
+++ b/etc/init.d/zfs-load-key.in
@@ -104,7 +104,7 @@ do_stop()
 
 # ----------------------------------------------------
 
-if [ ! -e /sbin/openrc-run ]
+if @IS_SYSV_RC@
 then
 	case "$1" in
 		start)
diff --git a/etc/init.d/zfs-mount.in b/etc/init.d/zfs-mount.in
index a0825f19f..6a3ca5f86 100755
--- a/etc/init.d/zfs-mount.in
+++ b/etc/init.d/zfs-mount.in
@@ -114,7 +114,7 @@ do_stop()
 
 # ----------------------------------------------------
 
-if [ ! -e /sbin/openrc-run ]
+if @IS_SYSV_RC@
 then
 	case "$1" in
 		start)
diff --git a/etc/init.d/zfs-share.in b/etc/init.d/zfs-share.in
index 88978071c..06c59c620 100755
--- a/etc/init.d/zfs-share.in
+++ b/etc/init.d/zfs-share.in
@@ -57,7 +57,8 @@ do_stop()
 
 # ----------------------------------------------------
 
-if [ ! -e /sbin/openrc-run ]; then
+if @IS_SYSV_RC@
+then
 	case "$1" in
 		start)
 			do_start
diff --git a/etc/init.d/zfs-zed.in b/etc/init.d/zfs-zed.in
index e9cf88674..3d40600ce 100755
--- a/etc/init.d/zfs-zed.in
+++ b/etc/init.d/zfs-zed.in
@@ -93,7 +93,8 @@ do_reload()
 
 # ----------------------------------------------------
 
-if [ ! -e /sbin/openrc-run ]; then
+if @IS_SYSV_RC@
+then
 	case "$1" in
 		start)
 			do_start