From 1c941fdfbb5b2162bfc9c5f10b38df94663462e4 Mon Sep 17 00:00:00 2001
From: Joachim Wiberg <troglobit@gmail.com>
Date: Tue, 1 Jun 2021 11:43:58 +0200
Subject: [PATCH] plugins: add support for disabling RTC and urandom plugins

Some systems may want to handle RTC and /dev/urandom by themselves, or
not at all as in the case of containers where the host does all this.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
---
 configure.ac        |  2 ++
 plugins/Makefile.am | 20 ++++++++++++++++++--
 plugins/urandom.c   |  2 +-
 3 files changed, 21 insertions(+), 3 deletions(-)

diff --git a/configure.ac b/configure.ac
index ebafbfc4..ffa8a81a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -81,6 +81,8 @@ AC_PLUGIN([resolvconf],    [no],  [Setup necessary files for resolvconf])
 AC_PLUGIN([x11-common],    [no],  [Console setup (for X)])
 AC_PLUGIN([netlink],       [yes], [Basic netlink plugin for IFUP/IFDN and GW events. Can be replaced with externally built plugin that links with libnl or similar.])
 AC_PLUGIN([hotplug],       [yes], [Setup and start udev or mdev hotplug daemon])
+AC_PLUGIN([rtc],           [yes], [Save and restore RTC using hwclock])
+AC_PLUGIN([urandom],       [yes], [Setup and save random seed at boot/shutdown])
 
 # Check for extra arguments or packages
 AC_ARG_WITH(heading,
diff --git a/plugins/Makefile.am b/plugins/Makefile.am
index 91bb5dbf..bd50c591 100644
--- a/plugins/Makefile.am
+++ b/plugins/Makefile.am
@@ -7,7 +7,7 @@ AM_CPPFLAGS        += $(lite_CFLAGS)
 
 if STATIC
 noinst_LTLIBRARIES  = libplug.la
-libplug_la_SOURCES  = bootmisc.c modprobe.c rtc.c pidfile.c procps.c sys.c tty.c urandom.c usr.c
+libplug_la_SOURCES  = bootmisc.c modprobe.c pidfile.c procps.c sys.c tty.c usr.c
 
 if BUILD_ALSA_UTILS_PLUGIN
 libplug_la_SOURCES += alsa-utils.c
@@ -33,12 +33,20 @@ if BUILD_RESOLVCONF_PLUGIN
 libplug_la_SOURCES += resolvconf.c
 endif
 
+if BUILD_RTC_PLUGIN
+libplug_la_SOURCES += rtc.c
+endif
+
+if BUILD_URANDOM_PLUGIN
+libplug_la_SOURCES += urandom.c
+endif
+
 if BUILD_X11_COMMON_PLUGIN
 libplug_la_SOURCES += x11-common.c
 endif
 
 else
-pkglib_LTLIBRARIES  = bootmisc.la modprobe.la rtc.la pidfile.la procps.la sys.la tty.la urandom.la usr.la
+pkglib_LTLIBRARIES  = bootmisc.la modprobe.la pidfile.la procps.la sys.la tty.la usr.la
 
 if BUILD_ALSA_UTILS_PLUGIN
 pkglib_LTLIBRARIES += alsa-utils.la
@@ -64,6 +72,14 @@ if BUILD_RESOLVCONF_PLUGIN
 pkglib_LTLIBRARIES += resolvconf.la
 endif
 
+if BUILD_RTC_PLUGIN
+pkglib_LTLIBRARIES += rtc.la
+endif
+
+if BUILD_URANDOM_PLUGIN
+pkglib_LTLIBRARIES += urandom.la
+endif
+
 if BUILD_X11_COMMON_PLUGIN
 pkglib_LTLIBRARIES += x11-common.la
 endif
diff --git a/plugins/urandom.c b/plugins/urandom.c
index 1a3adbf7..59d77636 100644
--- a/plugins/urandom.c
+++ b/plugins/urandom.c
@@ -1,4 +1,4 @@
-/* Setup random seed
+/* Setup and save random seed at boot/shutdown
  *
  * Copyright (c) 2012-2021  Joachim Wiberg <troglobit@gmail.com>
  *