base-files: move urandom seed bits into separate package

So it's possible to install or remove it as needed.

Tested-by: Lucian Cristian <lucian.cristian@gmail.com>
Signed-off-by: Petr Štetiar <ynezz@true.cz>

package/base-files/Makefile

@@ -12,7 +12,7 @@ include $(INCLUDE_DIR)/version.mk
 include $(INCLUDE_DIR)/feeds.mk
 
 PKG_NAME:=base-files
-PKG_RELEASE:=197
+PKG_RELEASE:=198
 PKG_FLAGS:=nonshared
 
 PKG_FILE_DEPENDS:=$(PLATFORM_DIR)/ $(GENERIC_PLATFORM_DIR)/base-files/
@@ -43,6 +43,15 @@ define Package/base-files
   VERSION:=$(PKG_RELEASE)-$(REVISION)
 endef
 
+define Package/urandom-seed
+  SECTION:=base
+  CATEGORY:=Base system
+  DEPENDS:=+libc +ubox-getrandom
+  TITLE:=/etc/urandom.seed handling for OpenWrt
+  URL:=http://openwrt.org/
+  VERSION:=$(PKG_RELEASE)-$(REVISION)
+endef
+
 define Package/base-files/conffiles
 /etc/config/
 /etc/config/network

package/base-files/files/etc/init.d/urandom_seed

@@ -1,12 +0,0 @@
-#!/bin/sh /etc/rc.common
-
-START=99
-USE_PROCD=1
-
-start_service() {
-    procd_open_instance "urandom_seed"
-    procd_set_param command "/sbin/urandom_seed"
-    procd_set_param stdout 1
-    procd_set_param stderr 1
-    procd_close_instance
-}

package/base-files/files/lib/preinit/81_urandom_seed

@@ -1,24 +0,0 @@
-#!/bin/sh
-
-log_urandom_seed() {
-    echo "urandom-seed: $1" > /dev/kmsg
-}
-
-_do_urandom_seed() {
-    [ -f "$1" ] || { log_urandom_seed "Seed file not found ($1)"; return; }
-    [ -O "$1" -a -G "$1" -a ! -x "$1" ] || { log_urandom_seed "Wrong owner / permissions for $1"; return; }
-
-    log_urandom_seed "Seeding with $1"
-    cat "$1" > /dev/urandom
-}
-
-do_urandom_seed() {
-    [ -c /dev/urandom ] || { log_urandom_seed "Something is wrong with /dev/urandom"; return; }
-
-    _do_urandom_seed "/etc/urandom.seed"
-
-    SEED="$(uci -q get system.@system[0].urandom_seed)"
-    [ "${SEED:0:1}" = "/" -a "$SEED" != "/etc/urandom.seed" ] && _do_urandom_seed "$SEED"
-}
-
-boot_hook_add preinit_main do_urandom_seed

package/base-files/files/sbin/urandom_seed

@@ -1,20 +0,0 @@
-#!/bin/sh
-set -e
-
-trap '[ "$?" -eq 0 ] || echo "An error occured" >&2' EXIT
-
-save() {
-    touch "$1.tmp"
-    chown root:root "$1.tmp"
-    chmod 600 "$1.tmp"
-    getrandom 512 > "$1.tmp"
-    mv "$1.tmp" "$1"
-    echo "Seed saved ($1)"
-}
-
-SEED="$(uci -q get system.@system[0].urandom_seed || true)"
-[ "${SEED:0:1}" = "/" ] && save "$SEED"
-
-SEED=/etc/urandom.seed
-[ ! -f $SEED ] && save "$SEED"
-true