openssh-9.7p1-systemd.patch

diff --git a/configure.ac b/configure.ac
index 82e8bb7..a431e05 100644
--- a/configure.ac
+++ b/configure.ac
@@ -4870,6 +4870,30 @@ AC_SUBST([GSSLIBS])
 AC_SUBST([K5LIBS])
 AC_SUBST([CHANNELLIBS])
 
+# Check whether user wants systemd support
+SYSTEMD_MSG="no"
+AC_ARG_WITH(systemd,
+	[  --with-systemd          Enable systemd support],
+	[ if test "x$withval" != "xno" ; then
+		AC_PATH_TOOL([PKGCONFIG], [pkg-config], [no])
+		if test "$PKGCONFIG" != "no"; then
+			AC_MSG_CHECKING([for libsystemd])
+			if $PKGCONFIG --exists libsystemd; then
+				SYSTEMD_CFLAGS=`$PKGCONFIG --cflags libsystemd`
+				SYSTEMD_LIBS=`$PKGCONFIG --libs libsystemd`
+				CPPFLAGS="$CPPFLAGS $SYSTEMD_CFLAGS"
+				SSHDLIBS="$SSHDLIBS $SYSTEMD_LIBS"
+				AC_MSG_RESULT([yes])
+				AC_DEFINE(HAVE_SYSTEMD, 1, [Define if you want systemd support.])
+				SYSTEMD_MSG="yes"
+			else
+				AC_MSG_RESULT([no])
+			fi
+		fi
+	fi ]
+)
+
+
 # Looking for programs, paths and files
 
 PRIVSEP_PATH=/var/empty
diff --git a/sshd.c b/sshd.c
index b4f2b97..b3d23bb 100644
--- a/sshd.c
+++ b/sshd.c
@@ -88,6 +88,10 @@
 #include <prot.h>
 #endif
 
+#ifdef HAVE_SYSTEMD
+#include <systemd/sd-daemon.h>
+#endif
+
 #include "xmalloc.h"
 #include "ssh.h"
 #include "ssh2.h"
@@ -2093,6 +2097,11 @@ main(int ac, char **av)
 			}
 		}
 
+#ifdef HAVE_SYSTEMD
+		/* Signal systemd that we are ready to accept connections */
+		sd_notify(0, "READY=1");
+#endif
+
 		/* Accept a connection and return in a forked child */
 		server_accept_loop(&sock_in, &sock_out,
 		    &newsock, config_s);