readd sd_notify patch

0022-Backport-sd-notify-patch-for-systemd-support-1687040.patch

@@ -0,0 +1,97 @@
+From 5c6204bab7279050b78b3d03d1211e9d13d3fd71 Mon Sep 17 00:00:00 2001
+From: Pavel Zhukov <pzhukov@redhat.com>
+Date: Wed, 27 Mar 2019 09:59:20 +0100
+Subject: [PATCH] Backport sd-notify patch for systemd support (#1687040)
+Cc: pzhukov@redhat.com
+
+---
+ configure.ac     | 11 +++++++++++
+ relay/dhcrelay.c | 12 ++++++++++++
+ server/dhcpd.c   | 12 ++++++++++++
+ 3 files changed, 35 insertions(+)
+
+diff --git a/configure.ac b/configure.ac
+index 15fc0d7..0c08000 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -1014,6 +1014,17 @@ if test x$ldap = xyes || test x$ldapcrypto = xyes || test x$ldap_gssapi = xyes;
+     AC_SUBST(LDAP_CFLAGS, [$LDAP_CFLAGS])
+ fi
+ 
++AC_ARG_WITH(systemd,
++        AC_HELP_STRING([--with-systemd],
++                       [enable sending status notifications to systemd daemon (default is no)]),
++        [systemd=$withval],
++        [systemd=no])
++
++if test x$systemd = xyes ; then
++   AC_CHECK_LIB(systemd, sd_notifyf, ,
++                AC_MSG_FAILURE([*** systemd library not present - do you need to install systemd-libs package?]))
++fi
++
+ # Append selected warning levels to CFLAGS before substitution (but after
+ # AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[]])],[],[]) & etc).
+ CFLAGS="$CFLAGS $STD_CWARNINGS"
+diff --git a/relay/dhcrelay.c b/relay/dhcrelay.c
+index 7b4f4f1..9eb5bfd 100644
+--- a/relay/dhcrelay.c
++++ b/relay/dhcrelay.c
+@@ -37,6 +37,10 @@
+    int keep_capabilities = 0;
+ #endif
+ 
++#ifdef HAVE_LIBSYSTEMD
++#include <systemd/sd-daemon.h>
++#endif
++
+ TIME default_lease_time = 43200; /* 12 hours... */
+ TIME max_lease_time = 86400; /* 24 hours... */
+ struct tree_cache *global_options[256];
+@@ -845,6 +849,14 @@ main(int argc, char **argv) {
+ 	}
+ #endif
+ 
++#ifdef HAVE_LIBSYSTEMD
++        /* We are ready to process incomming packets. Let's notify systemd */
++        sd_notifyf(0, "READY=1\n"
++                   "STATUS=Dispatching packets...\n"
++                   "MAINPID=%lu",
++                   (unsigned long) getpid());
++#endif
++
+ 	/* Start dispatching packets and timeouts... */
+ 	dispatch();
+ 
+diff --git a/server/dhcpd.c b/server/dhcpd.c
+index 530a923..e06f6b4 100644
+--- a/server/dhcpd.c
++++ b/server/dhcpd.c
+@@ -60,6 +60,10 @@ gid_t set_gid = 0;
+ struct class unknown_class;
+ struct class known_class;
+ 
++#ifdef HAVE_LIBSYSTEMD
++#include <systemd/sd-daemon.h>
++#endif
++
+ struct iaddr server_identifier;
+ int server_identifier_matched;
+ 
+@@ -1057,6 +1061,14 @@ main(int argc, char **argv) {
+ 	/* Log that we are about to start working */
+ 	log_info("Server starting service.");
+ 
++#ifdef HAVE_LIBSYSTEMD
++        /* We are ready to process incomming packets. Let's notify systemd */
++        sd_notifyf(0, "READY=1\n"
++                   "STATUS=Dispatching packets...\n"
++                   "MAINPID=%lu",
++                   (unsigned long) getpid());
++#endif
++
+ 	/*
+ 	 * Receive packets and dispatch them...
+ 	 * dispatch() will never return.
+-- 
+2.14.5
+

dhcp.spec

@@ -15,7 +15,7 @@
 Summary:  Dynamic host configuration protocol software
 Name:     dhcp
 Version:  4.4.1
-Release:  7%{?dist}
+Release:  8%{?dist}
 # NEVER CHANGE THE EPOCH on this package.  The previous maintainer (prior to
 # dcantrell maintaining the package) made incorrect use of the epoch and
 # that's why it is at 12 now.  It should have never been used, but it was.
@@ -54,6 +54,7 @@ Patch18: 0018-No-subnet-declaration-for-iface-should-be-info-not-e.patch
 Patch19: 0019-dhclient-write-DUID_LLT-even-in-stateless-mode-11563.patch
 Patch20: 0020-Discover-all-hwaddress-for-xid-uniqueness.patch
 Patch21: 0021-Load-leases-DB-in-non-replay-mode-only.patch
+Patch22: 0022-Backport-sd-notify-patch-for-systemd-support-1687040.patch
 
 Obsoletes: dhcp-libs < 4.4
 
@@ -511,6 +512,9 @@ done
 %endif
 
 %changelog
+* Wed Mar 27 2019 Pavel Zhukov <pzhukov@redhat.com> - 12:4.4.1-8
+- Add sd_notify patch to support systemd notify (1687040)
+
 * Mon Mar 18 2019 Pavel Zhukov <pzhukov@redhat.com> - 12:4.4.1-7
 - Provides specific version of libs