Handle /proc/kallsym obfuscation (Closes: #891936)

[mirror_zfs-debian.git] / debian / zfs-dkms.postinst

diff --git a/debian/zfs-dkms.postinst b/debian/zfs-dkms.postinst
index 0408a3cd1ca874791de354e685af5166bf93a707..0ecb9674d559b504203e1d8219b07c3f98e90a30 100644 (file)
--- a/debian/zfs-dkms.postinst
+++ b/debian/zfs-dkms.postinst
@@ -1,10 +1,51 @@
-#!/bin/sh -e
+#!/bin/sh
+set -e
+
+# Source debconf library (see dh_installdebconf(1) and #106070 #626312)
+. /usr/share/debconf/confmodule
+
+kernelbits=unknown
+if [ -r /proc/kallsyms ]; then
+       addrlen=$(head -1 /proc/kallsyms| grep -o '^ *[^ ]*' |wc -c)
+       if [ $addrlen = 17 ]; then
+               kernelbits=64
+       elif [ $addrlen = 9 ]; then
+               kernelbits=32
+       fi
+fi
+
+if [ $kernelbits != 64 ]; then
+       if [ $kernelbits = 32 ]; then
+               db_get zfs-dkms/stop-build-for-32bit-kernel
+               if [ "$RET" = "true" ]; then
+                       echo "Ok, aborting, since ZFS is not designed for 32-bit kernels." 1>&2
+                       # Exit 0: Tell dpkg that we finished OK but stop here.
+                       # (don't build the module)
+                       exit 0
+               else
+                       echo "WARNING: Building ZFS module on a 32-bit kernel." 1>&2
+               fi
+       else
+               db_get zfs-dkms/stop-build-for-unknown-kernel
+               if [ "$RET" = "true" ]; then
+                       echo "Ok, aborting, since ZFS is not designed for 32-bit kernels." 1>&2
+                       # Exit 0: (same that above)
+                       exit 0
+               else
+                       echo "WARNING: Building ZFS module on an unknown kernel." 1>&2
+               fi
+       fi
+fi
+
+# Here the module gets built (automatically handled by dh_dkms)
+
+#DEBHELPER#
+
 
 case $1 in
        (configure)
-               [ -x /usr/share/update-notifier/notify-reboot-required ] \
-                 && /usr/share/update-notifier/notify-reboot-required
+               if [ -x /usr/share/update-notifier/notify-reboot-required ]; then
+                       /usr/share/update-notifier/notify-reboot-required
+               fi
                ;;
 esac
-
-#DEBHELPER#