Initial commit

meta-google/recipes-support/rng-tools/rng-tools/default

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+EXTRA_ARGS="-r /dev/hwrng -O jitter:thread_count:1"

meta-google/recipes-support/rng-tools/rng-tools_%.bbappend

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+FILESEXTRAPATHS:prepend:gbmc := "${THISDIR}/${PN}:"
+
+SRC_URI:append:gbmc = " file://default"
+
+SYSTEMD_SERVICE:${PN}-service:append:gbmc = " rng-tools-nojitter.service"
+
+do_install:append:gbmc() {
+  install -m 0644 ${D}${systemd_system_unitdir}/rng-tools.service \
+    ${D}${systemd_system_unitdir}/rng-tools-nojitter.service
+  # Don't enable jitter in rng-tools-nojitter
+  sed -i 's,\$EXTRA_ARGS,-x jitter \$EXTRA_ARGS,' \
+    ${D}${systemd_system_unitdir}/rng-tools-nojitter.service
+  # Run the jitter enabled service if this one fails
+  sed -i '/^\[Unit\]$/aOnFailure=rng-tools.service\nConflicts=rng-tools.service' \
+    ${D}${systemd_system_unitdir}/rng-tools-nojitter.service
+
+  # Don't run the jitter service by default
+  sed -i '/^WantedBy=/d' ${D}${systemd_system_unitdir}/rng-tools.service
+}