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-rw-r--r--system/nix/doinst.sh25
1 files changed, 25 insertions, 0 deletions
diff --git a/system/nix/doinst.sh b/system/nix/doinst.sh
new file mode 100644
index 0000000000..032197f9aa
--- /dev/null
+++ b/system/nix/doinst.sh
@@ -0,0 +1,25 @@
+config() {
+ NEW="$1"
+ OLD="$(dirname $NEW)/$(basename $NEW .new)"
+ # If there's no config file by that name, mv it over:
+ if [ ! -r $OLD ]; then
+ mv $NEW $OLD
+ elif [ "$(cat $OLD | md5sum)" = "$(cat $NEW | md5sum)" ]; then
+ # toss the redundant copy
+ rm $NEW
+ fi
+ # Otherwise, we leave the .new copy for the admin to consider...
+}
+
+preserve_perms() {
+ NEW="$1"
+ OLD="$(dirname $NEW)/$(basename $NEW .new)"
+ if [ -e $OLD ]; then
+ cp -a $OLD ${NEW}.incoming
+ cat $NEW > ${NEW}.incoming
+ mv ${NEW}.incoming $NEW
+ fi
+ config $NEW
+}
+
+preserve_perms etc/rc.d/rc.nix.new