Stabilize the hostid for RPM installations.

[mirror_spl-debian.git] / spl-modules.spec.in

diff --git a/spl-modules.spec.in b/spl-modules.spec.in
index e02d6c25565e8073889f7744fd7844fbcb451e10..ddeb2609d73e0c025c53f56d1f456f09fb587cea 100644 (file)
--- a/spl-modules.spec.in
+++ b/spl-modules.spec.in
@@ -233,6 +233,17 @@ rm -rf $RPM_BUILD_ROOT
 %{_prefix}/src/*
 
 %post
+# The /sbin/genhostid utility writes a random value to the /etc/hostid
+# file, which means that using it here will break upgrades on systems
+# that already have spl installed.
+if [ ! -f /etc/hostid ]; then
+       HOSTID=$(hostid)
+       AA=$(echo $HOSTID | cut -b 1,2)
+       BB=$(echo $HOSTID | cut -b 3,4)
+       CC=$(echo $HOSTID | cut -b 5,6)
+       DD=$(echo $HOSTID | cut -b 7,8)
+       "$(which printf)" "\x$DD\x$CC\x$BB\x$AA" >"/etc/hostid"
+fi
 if [ -f /boot/System.map-%{kver} ]; then
        depmod -ae -F /boot/System.map-%{kver} %{kver} || exit 0
 else