Improve /dev/random usage when generating cookies for RPM distros
In a low entropy environments, `/dev/random` will block, so make sure to use
only as many bytes as we'll need instead of reading and discarding bytes as we
did previously.
diff --git a/rpm/SPECS/couchdb.spec.in b/rpm/SPECS/couchdb.spec.in
index cfec522..e77f949 100644
--- a/rpm/SPECS/couchdb.spec.in
+++ b/rpm/SPECS/couchdb.spec.in
@@ -151,7 +151,7 @@
cookie=${COUCHDB_COOKIE}
else
echo "Generating random cookie value."
- cookie=$(cat /dev/random | tr -dc 'a-zA-Z0-9' | head --bytes 48)
+ cookie=$(dd if=/dev/random bs=1 count=38 status=none | base64 | tr -cd [:alnum:])
fi
%{__sed} -i "s/^-setcookie monster.*$/-setcookie ${cookie}/" /opt/%{name}/etc/vm.args
elif %{__grep} -q "^[# ]*-setcookie$" /opt/%{name}/etc/vm.args; then
@@ -161,7 +161,7 @@
cookie=${COUCHDB_COOKIE}
else
echo "Generating random cookie value."
- cookie=$(cat /dev/random | tr -dc 'a-zA-Z0-9' | head --bytes 48)
+ cookie=$(dd if=/dev/random bs=1 count=38 status=none | base64 | tr -cd [:alnum:])
fi
%{__sed} -i "s/^[# ]*-setcookie.*$/-setcookie ${cookie}/" /opt/%{name}/etc/vm.args
fi
