1 files changed, 62 insertions, 0 deletions
diff --git a/core/pacman/pacman.install b/core/pacman/pacman.install
new file mode 100644
index 000000000..0e598bb4b
--- /dev/null
+++ b/core/pacman/pacman.install
@@ -0,0 +1,62 @@
+#!/bin/sh
+# arg 1:  the new package version
+# arg 2:  the old package version
+post_upgrade() {
+    # one time stuff for md5sum issue with older pacman versions
+    if [ "$(vercmp $2 3.0.2)" -lt 0 ]; then
+        _resetbackups
+    fi
+    if [ "$(vercmp $2 3.5.0)" -lt 0 ]; then
+        _warnupgrade
+    fi
+}
+
+_warnupgrade() {
+    echo ">>> The pacman database format has changed as of pacman 3.5.0."
+    echo ">>> You will need to run \`pacman-db-upgrade\` as root."
+    echo ">>>"
+}
+
+_resetbackups() {
+    echo ">>> Performing one-time reset of NoUpgrade md5sums. After this reset"
+    echo ">>> you are able to remove all NoUpgrade lines of already protected"
+    echo ">>> files from pacman.conf."
+    echo ">>>"
+
+    # path variables
+    pacconf="/etc/pacman.conf"
+    dbpath="/var/lib/pacman/local"
+
+    # get a list of NoUpgrade files from the user's pacman.conf
+    echo ">>> Retrieving pacman.conf NoUpgrade list..."
+    config=$(grep "^NoUpgrade" $pacconf | cut -d'=' -f2)
+    # add the standard list of files, even if they are already above
+    config="$config \
+    etc/passwd etc/group etc/shadow etc/sudoers \
+    etc/fstab etc/raidtab etc/ld.so.conf \
+    etc/rc.conf etc/rc.local \
+    etc/modprobe.conf etc/modules.conf \
+    etc/lilo.conf boot/grub/menu.lst"
+
+    # blank md5sum for use in sed expression
+    zeroes='00000000000000000000000000000000'
+
+    for file in $config; do
+        echo ">>> -> finding owner of /$file..."
+        line=$(LC_ALL=C LANG=C pacman -Qo /$file 2>/dev/null)
+        # if file is owned by a package, go find its incorrectly stored sum
+        if [ ! -z "$line" ]; then
+            # get the name and version of the package owning file
+            name=$(echo $line | awk '{print $5}')
+            version=$(echo $line | awk '{print $6}')
+            # set the path to the backup array holding the md5sum
+            path="$dbpath/$name-$version/files"
+            # run a sed on the path to reset the line containing $file
+            # NOTE: literal tab characters in sed expression after $file
+            echo ">>> -> resetting sum of /$file..."
+            sed -i "s#$file [0-9a-fA-F]*#$file  $zeroes#" $path
+        else
+            echo ">>> -> $file is unowned."
+        fi
+    done
+}