[OE-core] [PATCH] Change resolv.conf generation for sysvinit

[Jate Sujjavanich]

Move /etc/resolv.conf link generation a volatiles file. Then use
update-alternatives to choose the correct one. This is for sysvinit
and resolvconf.
---
 .../resolvconf/files/volatiles_resolv-conf         |    1 +
 .../resolvconf/resolvconf_1.75.bb                  |   15 ++++++++++++++-
 .../initscripts/initscripts-1.0/volatiles          |    1 -
 .../initscripts-1.0/volatiles_resolv-conf          |    1 +
 meta/recipes-core/initscripts/initscripts_1.0.bb   |    9 ++++++++-
 5 files changed, 24 insertions(+), 3 deletions(-)
 create mode 100644 meta/recipes-connectivity/resolvconf/files/volatiles_resolv-conf
 create mode 100644 meta/recipes-core/initscripts/initscripts-1.0/volatiles_resolv-conf

diff --git a/meta/recipes-connectivity/resolvconf/files/volatiles_resolv-conf b/meta/recipes-connectivity/resolvconf/files/volatiles_resolv-conf
new file mode 100644
index 0000000..e58993d
--- /dev/null
+++ b/meta/recipes-connectivity/resolvconf/files/volatiles_resolv-conf
@@ -0,0 +1 @@
+l root root 0644 /etc/resolv.conf /etc/resolvconf/run/resolv.conf
diff --git a/meta/recipes-connectivity/resolvconf/resolvconf_1.75.bb b/meta/recipes-connectivity/resolvconf/resolvconf_1.75.bb
index 7310c83..e108516 100644
--- a/meta/recipes-connectivity/resolvconf/resolvconf_1.75.bb
+++ b/meta/recipes-connectivity/resolvconf/resolvconf_1.75.bb
@@ -11,12 +11,16 @@ AUTHOR = "Thomas Hood"
 HOMEPAGE = "http://packages.debian.org/resolvconf"
 RDEPENDS_${PN} = "bash"
 
-SRC_URI = "${DEBIAN_MIRROR}/main/r/resolvconf/resolvconf_${PV}.tar.xz"
+SRC_URI = "\
+	${DEBIAN_MIRROR}/main/r/resolvconf/resolvconf_${PV}.tar.xz \
+	file://volatiles_resolv-conf \
+"
 
 SRC_URI[md5sum] = "4b8bc86a3cf070e3fd0e9aff7eaaba56"
 SRC_URI[sha256sum] = "16167f37a77ef4bc4596dcbefece269b6a10d10fa448594ec55ed3303193086e"
 
 inherit allarch
+inherit update-alternatives
 
 do_compile () {
 	:
@@ -30,6 +34,10 @@ do_install () {
 		install -d ${D}${sysconfdir}/tmpfiles.d
 		echo "d /run/${BPN}/interface - - - -" \
 		     > ${D}${sysconfdir}/tmpfiles.d/resolvconf.conf
+	else
+		# Use a volatiles script to install resolv.conf symlink
+		install -d install -d ${D}${libdir}/${BPN}
+		install -m 0755 ${WORKDIR}/volatiles_resolv-conf ${D}${libdir}/${BPN}/resolv-conf
 	fi
 	install -d ${D}${sysconfdir}/${BPN}
 	ln -snf ${localstatedir}/run/${BPN} ${D}${sysconfdir}/${BPN}/run
@@ -42,6 +50,11 @@ do_install () {
 	install -m 0644 man/resolvconf.8 ${D}${mandir}/man8/
 }
 
+ALTERNATIVE_PRIORITY = "100"
+ALTERNATIVE_${PN}_append = " ${@bb.utils.contains('DISTRO_FEATURES', 'systemd', '', 'resolvconf', d)}"
+ALTERNATIVE_LINK_NAME[resolv-conf] = "${sysconfdir}/default/volatiles/00_resolv-conf"
+ALTERNATIVE_TARGET[resolv-conf] = "${libdir}/${BPN}/resolv-conf"
+
 pkg_postinst_${PN} () {
 	if [ -z "$D" ]; then
 		if command -v systemd-tmpfiles >/dev/null; then
diff --git a/meta/recipes-core/initscripts/initscripts-1.0/volatiles b/meta/recipes-core/initscripts/initscripts-1.0/volatiles
index 297245d..cd5f1f1 100644
--- a/meta/recipes-core/initscripts/initscripts-1.0/volatiles
+++ b/meta/recipes-core/initscripts/initscripts-1.0/volatiles
@@ -32,5 +32,4 @@ l root root 1777 /tmp /var/tmp
 d root root 0755 /var/lock/subsys none
 f root root 0664 /var/log/wtmp none
 f root root 0664 /var/run/utmp none
-l root root 0644 /etc/resolv.conf /var/run/resolv.conf
 f root root 0644 /var/run/resolv.conf none
diff --git a/meta/recipes-core/initscripts/initscripts-1.0/volatiles_resolv-conf b/meta/recipes-core/initscripts/initscripts-1.0/volatiles_resolv-conf
new file mode 100644
index 0000000..ce7122d
--- /dev/null
+++ b/meta/recipes-core/initscripts/initscripts-1.0/volatiles_resolv-conf
@@ -0,0 +1 @@
+l root root 0644 /etc/resolv.conf /var/run/resolv.conf
diff --git a/meta/recipes-core/initscripts/initscripts_1.0.bb b/meta/recipes-core/initscripts/initscripts_1.0.bb
index 7273a82..721e258 100644
--- a/meta/recipes-core/initscripts/initscripts_1.0.bb
+++ b/meta/recipes-core/initscripts/initscripts_1.0.bb
@@ -3,7 +3,7 @@ DESCRIPTION = "Initscripts provide the basic system startup initialization scrip
 SECTION = "base"
 LICENSE = "GPLv2"
 LIC_FILES_CHKSUM = "file://COPYING;md5=751419260aa954499f7abaabaa882bbe"
-PR = "r155"
+PR = "r156"
 
 INHIBIT_DEFAULT_DEPS = "1"
 
@@ -29,6 +29,7 @@ SRC_URI = "file://functions \
            file://populate-volatile.sh \
            file://read-only-rootfs-hook.sh \
            file://volatiles \
+           file://volatiles_resolv-conf \
            file://save-rtc.sh \
            file://GPLv2.patch \
            file://dmesg.sh \
@@ -45,8 +46,14 @@ DEPENDS_append = " ${@bb.utils.contains('DISTRO_FEATURES','systemd','systemd-sys
 
 PACKAGES =+ "${PN}-functions"
 RDEPENDS_${PN} = "${PN}-functions"
+FILES_${PN} += "${libdir}/${BPN}/"
 FILES_${PN}-functions = "${sysconfdir}/init.d/functions*"
 
+ALTERNATIVE_PRIORITY_${PN} = "90"
+ALTERNATIVE_${PN} = "resolv-conf"
+ALTERNATIVE_LINK_NAME[resolv-conf] = "${sysconfdir}/default/volatiles/00_resolv-conf"
+ALTERNATIVE_TARGET[resolv-conf] = "${libdir}/${BPN}/resolv-conf"
+
 ALTERNATIVE_PRIORITY_${PN}-functions = "90"
 ALTERNATIVE_${PN}-functions = "functions"
 ALTERNATIVE_LINK_NAME[functions] = "${sysconfdir}/init.d/functions"
-- 
1.7.9.5