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From be187435911cde6cc3cef6982a508261074f1e56 Mon Sep 17 00:00:00 2001
From: Matt Jolly <Matt.Jolly@footclan.ninja>
Date: Thu, 2 Feb 2023 21:05:40 +1100
Subject: [PATCH] systemd: Add optional support for systemd `sd_notify`
This is a rebase of Dennis Lamm's <expeditioneer@gentoo.org>
patch based on Jakub Jelen's <jjelen@redhat.com> original patch
Upstream-Status: Submitted [https://github.com/openssh/openssh-portable/pull/375/commits/be187435911cde6cc3cef6982a508261074f1e56]
Signed-off-by: Xiangyu Chen <xiangyu.chen@windriver.com>
---
configure.ac | 24 ++++++++++++++++++++++++
sshd.c | 13 +++++++++++++
2 files changed, 37 insertions(+)
diff --git a/configure.ac b/configure.ac
index 22fee70f..486c189f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -4835,6 +4835,29 @@ 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
@@ -5634,6 +5657,7 @@ echo " libldns support: $LDNS_MSG"
echo " Solaris process contract support: $SPC_MSG"
echo " Solaris project support: $SP_MSG"
echo " Solaris privilege support: $SPP_MSG"
+echo " systemd support: $SYSTEMD_MSG"
echo " IP address in \$DISPLAY hack: $DISPLAY_HACK_MSG"
echo " Translate v4 in v6 hack: $IPV4_IN6_HACK_MSG"
echo " BSD Auth support: $BSD_AUTH_MSG"
diff --git a/sshd.c b/sshd.c
index 6321936c..859d6a0b 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"
@@ -310,6 +314,10 @@ static void
sighup_restart(void)
{
logit("Received SIGHUP; restarting.");
+#ifdef HAVE_SYSTEMD
+ /* Signal systemd that we are reloading */
+ sd_notify(0, "RELOADING=1");
+#endif
if (options.pid_file != NULL)
unlink(options.pid_file);
platform_pre_restart();
@@ -2086,6 +2094,11 @@ 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);
--
2.25.1
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