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commit 0e22b79bfde45a7cf7a2e51a68ec11c4285f3b31
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Author: Jakub Jelen <jjelen@redhat.com>
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Date:   Mon Nov 21 15:04:06 2016 +0100
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    systemd stuff
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diff --git a/configure.ac b/configure.ac
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index 2ffc369..162ce92 100644
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--- a/configure.ac
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+++ b/configure.ac
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@@ -4265,6 +4265,30 @@ AC_ARG_WITH([kerberos5],
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 AC_SUBST([GSSLIBS])
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 AC_SUBST([K5LIBS])
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+# Check whether user wants systemd support
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+SYSTEMD_MSG="no"
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+AC_ARG_WITH(systemd,
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+	[  --with-systemd          Enable systemd support],
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+	[ if test "x$withval" != "xno" ; then
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+		AC_PATH_TOOL([PKGCONFIG], [pkg-config], [no])
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+		if test "$PKGCONFIG" != "no"; then
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+			AC_MSG_CHECKING([for libsystemd])
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+			if $PKGCONFIG --exists libsystemd; then
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+				SYSTEMD_CFLAGS=`$PKGCONFIG --cflags libsystemd`
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+				SYSTEMD_LIBS=`$PKGCONFIG --libs libsystemd`
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+				CPPFLAGS="$CPPFLAGS $SYSTEMD_CFLAGS"
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+				SSHDLIBS="$SSHDLIBS $SYSTEMD_LIBS"
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+				AC_MSG_RESULT([yes])
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+				AC_DEFINE(HAVE_SYSTEMD, 1, [Define if you want systemd support.])
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+				SYSTEMD_MSG="yes"
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+			else
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+				AC_MSG_RESULT([no])
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+			fi
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+		fi
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+	fi ]
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+)
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+
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+
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 # Looking for programs, paths and files
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 PRIVSEP_PATH=/var/empty
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@@ -5097,6 +5121,7 @@ echo "                   libedit support: $LIBEDIT_MSG"
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 echo "                   libedit support: $LIBEDIT_MSG"
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 echo "  Solaris process contract support: $SPC_MSG"
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 echo "           Solaris project support: $SP_MSG"
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+echo "                   systemd support: $SYSTEMD_MSG"
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 echo "       IP address in \$DISPLAY hack: $DISPLAY_HACK_MSG"
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 echo "           Translate v4 in v6 hack: $IPV4_IN6_HACK_MSG"
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 echo "                  BSD Auth support: $BSD_AUTH_MSG"
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diff --git a/contrib/sshd.service b/contrib/sshd.service
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new file mode 100644
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index 0000000..e0d4923
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--- /dev/null
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+++ b/contrib/sshd.service
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@@ -0,0 +1,16 @@
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+[Unit]
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+Description=OpenSSH server daemon
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+Documentation=man:sshd(8) man:sshd_config(5)
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+After=network.target
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+
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+[Service]
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+Type=notify
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+ExecStart=/usr/sbin/sshd -D $OPTIONS
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+ExecReload=/bin/kill -HUP $MAINPID
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+KillMode=process
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+Restart=on-failure
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+RestartPreventExitStatus=255
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+
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+[Install]
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+WantedBy=multi-user.target
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+
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diff --git a/sshd.c b/sshd.c
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index 816611c..b8b9d13 100644
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--- a/sshd.c
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+++ b/sshd.c
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@@ -85,6 +85,10 @@
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 #include <prot.h>
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 #endif
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+#ifdef HAVE_SYSTEMD
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+#include <systemd/sd-daemon.h>
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+#endif
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+
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 #include "xmalloc.h"
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 #include "ssh.h"
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 #include "ssh1.h"
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@@ -1833,6 +1837,11 @@ main(int ac, char **av)
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 			}
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 		}
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+#ifdef HAVE_SYSTEMD
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+	/* Signal systemd that we are ready to accept connections */
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+	sd_notify(0, "READY=1");
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+#endif
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+
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 		/* Accept a connection and return in a forked child */
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 		server_accept_loop(&sock_in, &sock_out,
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 		    &newsock, config_s);