net-snmp: move systemd support to meta-systemd

Signed-off-by: Andreas Müller <schnitzeltony@googlemail.com>

4 files changed, 2 insertions, 1657 deletions

diff --git a/meta-oe/recipes-extended/net-snmp/files/snmpd.service b/meta-oe/recipes-extended/net-snmp/files/snmpd.service
deleted file mode 100644
index 10a1eb2128..0000000000
--- a/meta-oe/recipes-extended/net-snmp/files/snmpd.service
+++ /dev/null
@@ -1,13 +0,0 @@
-[Unit]
-Description=Simple Network Management Protocol (SNMP) Daemon.
-After=syslog.target network.target
-
-[Service]
-Type=notify
-Environment=OPTIONS="-LS0-6d"
-EnvironmentFile=-/etc/default/snmpd
-ExecStart=/usr/sbin/snmpd $OPTIONS -f
-ExecReload=/bin/kill -HUP $MAINPID
-
-[Install]
-WantedBy=multi-user.target
diff --git a/meta-oe/recipes-extended/net-snmp/files/snmptrapd.service b/meta-oe/recipes-extended/net-snmp/files/snmptrapd.service
deleted file mode 100644
index 951f9f2707..0000000000
--- a/meta-oe/recipes-extended/net-snmp/files/snmptrapd.service
+++ /dev/null
@@ -1,13 +0,0 @@
-[Unit]
-Description=Simple Network Management Protocol (SNMP) Trap Daemon.
-After=syslog.target network.target
-
-[Service]
-Type=notify
-Environment=OPTIONS="-Lsd"
-EnvironmentFile=-/etc/default/snmptrapd
-ExecStart=/usr/sbin/snmptrapd $OPTIONS -f
-ExecReload=/bin/kill -HUP $MAINPID
-
-[Install]
-WantedBy=multi-user.target
diff --git a/meta-oe/recipes-extended/net-snmp/files/systemd-support.patch b/meta-oe/recipes-extended/net-snmp/files/systemd-support.patch
deleted file mode 100644
index 18955f29ee..0000000000
--- a/meta-oe/recipes-extended/net-snmp/files/systemd-support.patch
+++ /dev/null
@@ -1,1616 +0,0 @@
-Systemd support backported from the master branch as of 23/04/2012 (post 5.7.1, pre 5.8).
-
-The following commits have been cherry-picked:
-
-19499c3c90bf9d7b2b9e5d08baa26cc6bba28a11
-fef6cddfdb94da1a6b1fb768af62918b80f11fd3
-0641e43c694c485cbbffef0556efc4641bd3ff50
-76530a89f1c8bbd0b63acce63e10d5d4812a1a16 (conflict resolved)
-bf108d7f1354f6276fc43c129963f2c49b9fc242
-74412748067c685e1d8ab6ed3bcc3ca9c2774844
-86132e3f1e6ef7b4e0b96d8fa24e37c81b71b0e0
-63557cf8986a33dba1d4429b583a901361052c4f
-
-Upstream-Status: Backport
-
-diff --git a/README.systemd b/README.systemd
-new file mode 100644
-index 0000000..f731851
---- /dev/null
-+++ b/README.systemd
-@@ -0,0 +1,41 @@
-+README.systemd
-+--------------
-+Net-SNMP provides two daemons, which support systemd system manager. 
-+See http://www.freedesktop.org/wiki/Software/systemd to learn how
-+systemd works. Both socket activation and notification is supported by these
-+daemons.
-+
-+To enable systemd support, the sources must be compiled with
-+--with-systemd configure option.
-+
-+snmpd - The SNMP agent
-+----------------------
-+Socket activation od snmpd daemon is implemented, but it's discouraged.
-+The reason is simple - snmpd not only listens and processes SNMP requests
-+from network, but also gathers system statistics counters, sends traps and
-+communicates with subagents. It even opens few netlink sockets.
-+
-+In other words, snmpd should run from system start to properly work.
-+This can be done in two ways:
-+1) either as snmpd service unit with 'Type=notification' and without a socket
-+   unit
-+2) or as snmpd service unit with 'Type=simple', appropriate socket socket unit
-+   and the snmpd service enabled. This way systemd creates the snmpd listening
-+   socket early during boot and passes the sockets to snmpd slightly later
-+   (but still during machine boot). This way systemd can paralelize start of
-+   services, which depend on snmpd. Admins must adjust the socket file manually,
-+   depending if the snmpd support AgentX, IPv6, SMUX etc.
-+
-+snmpd should be started with '-f' command line parameter to disable forking -
-+systemd does that for us automatically.
-+
-+
-+snmptrapd - The trap processing daemon
-+--------------------------------------
-+snmptrapd supports full socket activation and also notification (if needed).
-+Both 'Type=simple' (with appropriate socket unit) and 'Type=notify' services
-+will work. Again, '-f' parameter should be provided on snmptrapd command line.
-+
-+If integration with SNMP agent using AgentX protocol is enabled, snmptrapd should
-+start during boot and not after first SNMP trap arrives. Same rules as for snmpd
-+applies then.
-\ No newline at end of file
-diff --git a/agent/snmpd.c b/agent/snmpd.c
-index b177d5b..08bdfc7 100644
---- a/agent/snmpd.c
-+++ b/agent/snmpd.c
-@@ -164,6 +164,10 @@ typedef long    fd_mask;
- 
- #endif
- 
-+#ifndef NETSNMP_NO_SYSTEMD
-+#include <net-snmp/library/sd-daemon.h>
-+#endif
-+
- netsnmp_feature_want(logging_file)
- netsnmp_feature_want(logging_stdio)
- netsnmp_feature_want(logging_syslog)
-@@ -441,18 +445,28 @@ main(int argc, char *argv[])
-     int             agent_mode = -1;
-     char           *pid_file = NULL;
-     char            option_compatability[] = "-Le";
-+#ifndef WIN32
-+    int             prepared_sockets = 0;
-+#endif
- #if HAVE_GETPID
-     int fd;
-     FILE           *PID;
- #endif
- 
- #ifndef WIN32
-+#ifndef NETSNMP_NO_SYSYSTEMD
-+    /* check if systemd has sockets for us and don't close them */
-+    prepared_sockets = netsnmp_sd_listen_fds(0);
-+#endif /* NETSNMP_NO_SYSYSTEMD */
-+
-     /*
-      * close all non-standard file descriptors we may have
-      * inherited from the shell.
-      */
--    for (i = getdtablesize() - 1; i > 2; --i) {
--        (void) close(i);
-+    if (!prepared_sockets) {
-+        for (i = getdtablesize() - 1; i > 2; --i) {
-+            (void) close(i);
-+        }
-     }
- #endif /* #WIN32 */
-     
-@@ -1100,6 +1114,19 @@ main(int argc, char *argv[])
-     netsnmp_addrcache_initialise();
- 
-     /*
-+     * Let systemd know we're up.
-+     */
-+#ifndef NETSNMP_NO_SYSTEMD
-+    netsnmp_sd_notify(1, "READY=1\n");
-+    if (prepared_sockets)
-+        /*
-+         * Clear the environment variable, we already processed all the sockets
-+         * by now.
-+         */
-+        netsnmp_sd_listen_fds(1);
-+#endif
-+
-+    /*
-      * Forever monitor the dest_port for incoming PDUs.  
-      */
-     DEBUGMSGTL(("snmpd/main", "We're up.  Starting to process data.\n"));
-diff --git a/apps/snmptrapd.c b/apps/snmptrapd.c
-index 1a52080..0857ae1 100644
---- a/apps/snmptrapd.c
-+++ b/apps/snmptrapd.c
-@@ -125,6 +125,10 @@ SOFTWARE.
- 
- #include <net-snmp/net-snmp-features.h>
- 
-+#ifndef NETSNMP_NO_SYSTEMD
-+#include <net-snmp/library/sd-daemon.h>
-+#endif
-+
- #ifndef BSD4_3
- #define BSD4_2
- #endif
-@@ -655,15 +659,24 @@ main(int argc, char *argv[])
-     int             agentx_subagent = 1;
- #endif
-     netsnmp_trapd_handler *traph;
-+#ifndef WIN32
-+    int             prepared_sockets = 0;
-+#endif
- 
- 
- #ifndef WIN32
-+#ifndef NETSNMP_NO_SYSTEMD
-+    /* check if systemd has sockets for us and don't close them */
-+    prepared_sockets = netsnmp_sd_listen_fds(0);
-+#endif
-     /*
-      * close all non-standard file descriptors we may have
-      * inherited from the shell.
-      */
--    for (i = getdtablesize() - 1; i > 2; --i) {
--        (void) close(i);
-+    if (!prepared_sockets) {
-+        for (i = getdtablesize() - 1; i > 2; --i) {
-+            (void) close(i);
-+        }
-     }
- #endif /* #WIN32 */
-     
-@@ -1311,6 +1324,19 @@ main(int argc, char *argv[])
- #endif
- #endif
- 
-+    /*
-+     * Let systemd know we're up.
-+     */
-+#ifndef NETSNMP_NO_SYSTEMD
-+    netsnmp_sd_notify(1, "READY=1\n");
-+    if (prepared_sockets)
-+        /*
-+         * Clear the environment variable, we already processed all the sockets
-+         * by now.
-+         */
-+        netsnmp_sd_listen_fds(1);
-+#endif
-+
- #ifdef WIN32SERVICE
-     trapd_status = SNMPTRAPD_RUNNING;
- #endif
-diff --git a/configure.d/config_modules_lib b/configure.d/config_modules_lib
-index b6609c1..5849072 100644
---- a/configure.d/config_modules_lib
-+++ b/configure.d/config_modules_lib
-@@ -53,6 +53,14 @@ if test "x$PARTIALTARGETOS" = "xmingw32" -o "x$PARTIALTARGETOS" = "xmingw32msvc"
-   other_ftobjs_list="$other_ftobjs_list winpipe.ft"
- fi
- 
-+# Linux systemd
-+if test "x$with_systemd" == "xyes"; then
-+  other_src_list="$other_src_list sd-daemon.c"
-+  other_objs_list="$other_objs_list sd-daemon.o"
-+  other_lobjs_list="$other_lobjs_list sd-daemon.lo"
-+  other_ftobjs_list="$other_ftobjs_list sd-daemon.ft"
-+fi
-+
- AC_SUBST(other_src_list)
- AC_SUBST(other_objs_list)
- AC_SUBST(other_lobjs_list)
-diff --git a/configure.d/config_project_with_enable b/configure.d/config_project_with_enable
-index 8b46ad2..59d6d5c 100644
---- a/configure.d/config_project_with_enable
-+++ b/configure.d/config_project_with_enable
-@@ -689,6 +689,15 @@ if test "x$with_dummy_values" != "xyes"; then
-      data for])
- fi
- 
-+NETSNMP_ARG_WITH(systemd,
-+[  --with-systemd                 Provide systemd support. See README.systemd
-+                                  for details.])
-+# Define unless specifically suppressed (i.e., option defaults to false).
-+if test "x$with_systemd" != "xyes"; then
-+  AC_DEFINE(NETSNMP_NO_SYSTEMD, 1,
-+    [If you don't want to integrate with systemd.])
-+fi
-+
- NETSNMP_ARG_ENABLE(set-support,
- [  --disable-set-support           Do not allow SNMP set requests.])
- if test "x$enable_set_support" = "xno"; then
-diff --git a/dist/snmpd.service b/dist/snmpd.service
-new file mode 100644
-index 0000000..31391e5
---- /dev/null
-+++ b/dist/snmpd.service
-@@ -0,0 +1,18 @@
-+#
-+# SNMP agent service file for systemd
-+#
-+#
-+# The service should be enabled, i.e. snmpd should start during machine boot.
-+# Socket activation shall not be used. See README.systemd for details.
-+
-+[Unit]
-+Description=Simple Network Management Protocol (SNMP) daemon.
-+After=syslog.target network.target
-+
-+[Service]
-+# Type=notify is also supported. It should be set when snmpd.socket is not used.
-+Type=simple
-+ExecStart=/usr/sbin/snmpd -f
-+
-+[Install]
-+WantedBy=multi-user.target
-diff --git a/dist/snmpd.socket b/dist/snmpd.socket
-new file mode 100644
-index 0000000..7f3a2d9
---- /dev/null
-+++ b/dist/snmpd.socket
-@@ -0,0 +1,17 @@
-+[Unit]
-+Description=Socket listening for SNMP and AgentX messages
-+
-+[Socket]
-+ListenDatagram=0.0.0.0:161
-+# Uncomment other listening addresses as needed - TCP, UDP6, TCP6.
-+# It must match listening addresses/ports defined in snmpd.service
-+# or snmpd.conf.
-+# ListenStream=0.0.0.0:161
-+# ListenDatagram=[::]:161
-+# ListenStream=[::]:161
-+#
-+# Uncomment AgentX socket if snmpd.conf enables AgentX protocol.
-+# ListenStream=/var/agentx/master
-+
-+[Install]
-+WantedBy=sockets.target
-diff --git a/dist/snmptrapd.service b/dist/snmptrapd.service
-new file mode 100644
-index 0000000..e88a5b4
---- /dev/null
-+++ b/dist/snmptrapd.service
-@@ -0,0 +1,16 @@
-+#
-+# SNMP trap-processing service file for systemd
-+#
-+
-+[Unit]
-+Description=Simple Network Management Protocol (SNMP) Trap daemon.
-+After=syslog.target network.target
-+
-+[Service]
-+# Type=notify is also supported. It should be set when snmptrapd.socket is not
-+# used.
-+Type=simple
-+ExecStart=/usr/sbin/snmptrapd -f
-+
-+[Install]
-+WantedBy=multi-user.target
-diff --git a/dist/snmptrapd.socket b/dist/snmptrapd.socket
-new file mode 100644
-index 0000000..0fc8a7c
---- /dev/null
-+++ b/dist/snmptrapd.socket
-@@ -0,0 +1,14 @@
-+[Unit]
-+Description=Socket listening for SNMP trap messages
-+
-+[Socket]
-+ListenDatagram=0.0.0.0:162
-+# Uncomment other listening addresses as needed - TCP, UDP6, TCP6.
-+# It must match listening addresses/ports defined in snmptrapd.service
-+# or snmptrapd.conf.
-+# ListenStream=0.0.0.0:162
-+# ListenDatagram=[::]:162
-+# ListenStream=[::]:162
-+
-+[Install]
-+WantedBy=sockets.target
-diff --git a/include/net-snmp/library/sd-daemon.h b/include/net-snmp/library/sd-daemon.h
-new file mode 100644
-index 0000000..85274c9
---- /dev/null
-+++ b/include/net-snmp/library/sd-daemon.h
-@@ -0,0 +1,290 @@
-+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-+
-+#ifndef SNMPD_SD_DAEMON_H
-+#define SNMPD_SD_DAEMON_H
-+
-+/***
-+  Copyright 2010 Lennart Poettering
-+
-+  Permission is hereby granted, free of charge, to any person
-+  obtaining a copy of this software and associated documentation files
-+  (the "Software"), to deal in the Software without restriction,
-+  including without limitation the rights to use, copy, modify, merge,
-+  publish, distribute, sublicense, and/or sell copies of the Software,
-+  and to permit persons to whom the Software is furnished to do so,
-+  subject to the following conditions:
-+
-+  The above copyright notice and this permission notice shall be
-+  included in all copies or substantial portions of the Software.
-+
-+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-+  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-+  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-+  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
-+  BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
-+  ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-+  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-+  SOFTWARE.
-+***/
-+
-+#ifdef HAVE_SYS_TYPES_H
-+#include <sys/types.h>
-+#endif
-+#ifdef HAVE_INTTYPES_H
-+#include <inttypes.h>
-+#endif
-+
-+#ifdef __cplusplus
-+extern "C" {
-+#endif
-+
-+/*
-+  Reference implementation of a few systemd related interfaces for
-+  writing daemons. These interfaces are trivial to implement. To
-+  simplify porting we provide this reference implementation.
-+  Applications are welcome to reimplement the algorithms described
-+  here if they do not want to include these two source files.
-+
-+  The following functionality is provided:
-+
-+  - Support for logging with log levels on stderr
-+  - File descriptor passing for socket-based activation
-+  - Daemon startup and status notification
-+  - Detection of systemd boots
-+
-+  You may compile this with -DDISABLE_SYSTEMD to disable systemd
-+  support. This makes all those calls NOPs that are directly related to
-+  systemd (i.e. only sd_is_xxx() will stay useful).
-+
-+  Since this is drop-in code we don't want any of our symbols to be
-+  exported in any case. Hence we declare hidden visibility for all of
-+  them.
-+
-+  You may find an up-to-date version of these source files online:
-+
-+  http://cgit.freedesktop.org/systemd/plain/src/sd-daemon.h
-+  http://cgit.freedesktop.org/systemd/plain/src/sd-daemon.c
-+
-+  This should compile on non-Linux systems, too, but with the
-+  exception of the sd_is_xxx() calls all functions will become NOPs.
-+
-+  See sd-daemon(7) for more information.
-+*/
-+
-+#ifndef _sd_printf_attr_
-+#if __GNUC__ >= 4
-+#define _sd_printf_attr_(a,b) __attribute__ ((format (printf, a, b)))
-+#else
-+#define _sd_printf_attr_(a,b)
-+#endif
-+#endif
-+
-+/*
-+  Log levels for usage on stderr:
-+
-+          fprintf(stderr, SD_NOTICE "Hello World!\n");
-+
-+  This is similar to printk() usage in the kernel.
-+*/
-+#define SD_EMERG   "<0>"  /* system is unusable */
-+#define SD_ALERT   "<1>"  /* action must be taken immediately */
-+#define SD_CRIT    "<2>"  /* critical conditions */
-+#define SD_ERR     "<3>"  /* error conditions */
-+#define SD_WARNING "<4>"  /* warning conditions */
-+#define SD_NOTICE  "<5>"  /* normal but significant condition */
-+#define SD_INFO    "<6>"  /* informational */
-+#define SD_DEBUG   "<7>"  /* debug-level messages */
-+
-+/* The first passed file descriptor is fd 3 */
-+#define SD_LISTEN_FDS_START 3
-+
-+/*
-+  Returns how many file descriptors have been passed, or a negative
-+  errno code on failure. Optionally, removes the $LISTEN_FDS and
-+  $LISTEN_PID file descriptors from the environment (recommended, but
-+  problematic in threaded environments). If r is the return value of
-+  this function you'll find the file descriptors passed as fds
-+  SD_LISTEN_FDS_START to SD_LISTEN_FDS_START+r-1. Returns a negative
-+  errno style error code on failure. This function call ensures that
-+  the FD_CLOEXEC flag is set for the passed file descriptors, to make
-+  sure they are not passed on to child processes. If FD_CLOEXEC shall
-+  not be set, the caller needs to unset it after this call for all file
-+  descriptors that are used.
-+
-+  See sd_listen_fds(3) for more information.
-+*/
-+int netsnmp_sd_listen_fds(int unset_environment);
-+
-+/*
-+  Helper call for identifying a passed file descriptor. Returns 1 if
-+  the file descriptor is a FIFO in the file system stored under the
-+  specified path, 0 otherwise. If path is NULL a path name check will
-+  not be done and the call only verifies if the file descriptor
-+  refers to a FIFO. Returns a negative errno style error code on
-+  failure.
-+
-+  See sd_is_fifo(3) for more information.
-+*/
-+int netsnmp_sd_is_fifo(int fd, const char *path);
-+
-+/*
-+  Helper call for identifying a passed file descriptor. Returns 1 if
-+  the file descriptor is a special character device on the file
-+  system stored under the specified path, 0 otherwise.
-+  If path is NULL a path name check will not be done and the call
-+  only verifies if the file descriptor refers to a special character.
-+  Returns a negative errno style error code on failure.
-+
-+  See sd_is_special(3) for more information.
-+*/
-+int netsnmp_sd_is_special(int fd, const char *path);
-+
-+/*
-+  Helper call for identifying a passed file descriptor. Returns 1 if
-+  the file descriptor is a socket of the specified family (AF_INET,
-+  ...) and type (SOCK_DGRAM, SOCK_STREAM, ...), 0 otherwise. If
-+  family is 0 a socket family check will not be done. If type is 0 a
-+  socket type check will not be done and the call only verifies if
-+  the file descriptor refers to a socket. If listening is > 0 it is
-+  verified that the socket is in listening mode. (i.e. listen() has
-+  been called) If listening is == 0 it is verified that the socket is
-+  not in listening mode. If listening is < 0 no listening mode check
-+  is done. Returns a negative errno style error code on failure.
-+
-+  See sd_is_socket(3) for more information.
-+*/
-+int netsnmp_sd_is_socket(int fd, int family, int type, int listening);
-+
-+/*
-+  Helper call for identifying a passed file descriptor. Returns 1 if
-+  the file descriptor is an Internet socket, of the specified family
-+  (either AF_INET or AF_INET6) and the specified type (SOCK_DGRAM,
-+  SOCK_STREAM, ...), 0 otherwise. If version is 0 a protocol version
-+  check is not done. If type is 0 a socket type check will not be
-+  done. If port is 0 a socket port check will not be done. The
-+  listening flag is used the same way as in sd_is_socket(). Returns a
-+  negative errno style error code on failure.
-+
-+  See sd_is_socket_inet(3) for more information.
-+*/
-+int netsnmp_sd_is_socket_inet(int fd, int family, int type, int listening, uint16_t port);
-+
-+/*
-+  Helper call for identifying a passed file descriptor. Returns 1 if
-+  the file descriptor is an AF_UNIX socket of the specified type
-+  (SOCK_DGRAM, SOCK_STREAM, ...) and path, 0 otherwise. If type is 0
-+  a socket type check will not be done. If path is NULL a socket path
-+  check will not be done. For normal AF_UNIX sockets set length to
-+  0. For abstract namespace sockets set length to the length of the
-+  socket name (including the initial 0 byte), and pass the full
-+  socket path in path (including the initial 0 byte). The listening
-+  flag is used the same way as in sd_is_socket(). Returns a negative
-+  errno style error code on failure.
-+
-+  See sd_is_socket_unix(3) for more information.
-+*/
-+int netsnmp_sd_is_socket_unix(int fd, int type, int listening, const char *path, size_t length);
-+
-+/*
-+  Informs systemd about changed daemon state. This takes a number of
-+  newline separated environment-style variable assignments in a
-+  string. The following variables are known:
-+
-+     READY=1      Tells systemd that daemon startup is finished (only
-+                  relevant for services of Type=notify). The passed
-+                  argument is a boolean "1" or "0". Since there is
-+                  little value in signaling non-readiness the only
-+                  value daemons should send is "READY=1".
-+
-+     STATUS=...   Passes a single-line status string back to systemd
-+                  that describes the daemon state. This is free-from
-+                  and can be used for various purposes: general state
-+                  feedback, fsck-like programs could pass completion
-+                  percentages and failing programs could pass a human
-+                  readable error message. Example: "STATUS=Completed
-+                  66% of file system check..."
-+
-+     ERRNO=...    If a daemon fails, the errno-style error code,
-+                  formatted as string. Example: "ERRNO=2" for ENOENT.
-+
-+     BUSERROR=... If a daemon fails, the D-Bus error-style error
-+                  code. Example: "BUSERROR=org.freedesktop.DBus.Error.TimedOut"
-+
-+     MAINPID=...  The main pid of a daemon, in case systemd did not
-+                  fork off the process itself. Example: "MAINPID=4711"
-+
-+  Daemons can choose to send additional variables. However, it is
-+  recommended to prefix variable names not listed above with X_.
-+
-+  Returns a negative errno-style error code on failure. Returns > 0
-+  if systemd could be notified, 0 if it couldn't possibly because
-+  systemd is not running.
-+
-+  Example: When a daemon finished starting up, it could issue this
-+  call to notify systemd about it:
-+
-+     sd_notify(0, "READY=1");
-+
-+  See sd_notifyf() for more complete examples.
-+
-+  See sd_notify(3) for more information.
-+*/
-+int netsnmp_sd_notify(int unset_environment, const char *state);
-+
-+/*
-+  Similar to sd_notify() but takes a format string.
-+
-+  Example 1: A daemon could send the following after initialization:
-+
-+     sd_notifyf(0, "READY=1\n"
-+                   "STATUS=Processing requests...\n"
-+                   "MAINPID=%lu",
-+                   (unsigned long) getpid());
-+
-+  Example 2: A daemon could send the following shortly before
-+  exiting, on failure:
-+
-+     sd_notifyf(0, "STATUS=Failed to start up: %s\n"
-+                   "ERRNO=%i",
-+                   strerror(errno),
-+                   errno);
-+
-+  See sd_notifyf(3) for more information.
-+*/
-+int netsnmp_sd_notifyf(int unset_environment, const char *format, ...) _sd_printf_attr_(2,3);
-+
-+/*
-+  Returns > 0 if the system was booted with systemd. Returns < 0 on
-+  error. Returns 0 if the system was not booted with systemd. Note
-+  that all of the functions above handle non-systemd boots just
-+  fine. You should NOT protect them with a call to this function. Also
-+  note that this function checks whether the system, not the user
-+  session is controlled by systemd. However the functions above work
-+  for both user and system services.
-+
-+  See sd_booted(3) for more information.
-+*/
-+int netsnmp_sd_booted(void);
-+
-+/**
-+ * Find an socket with given parameters. See man sd_is_socket_inet for
-+ * description of the arguments.
-+ *
-+ * Returns the file descriptor if it is found, 0 otherwise.
-+ */
-+int netsnmp_sd_find_inet_socket(int family, int type, int listening, int port);
-+
-+/**
-+ * Find an unix socket with given parameters. See man sd_is_socket_unix for
-+ * description of the arguments.
-+ *
-+ * Returns the file descriptor if it is found, 0 otherwise.
-+ */
-+int
-+netsnmp_sd_find_unix_socket(int type, int listening, const char *path);
-+
-+#ifdef __cplusplus
-+}
-+#endif
-+
-+#endif /* SNMPD_SD_DAEMON_H */
-diff --git a/snmplib/sd-daemon.c b/snmplib/sd-daemon.c
-new file mode 100644
-index 0000000..42dba29
---- /dev/null
-+++ b/snmplib/sd-daemon.c
-@@ -0,0 +1,532 @@
-+/*
-+ * Systemd integration parts.
-+ *
-+ * Most of this file is directly copied from systemd sources.
-+ * Changes:
-+ * - all functions were renamed to have netsnmp_ prefix
-+ * - includes were  changed to match Net-SNMP style.
-+ * - removed gcc export macros
-+ * - removed POSIX message queues
-+ */
-+
-+#include <net-snmp/net-snmp-config.h>
-+#include <net-snmp/net-snmp-features.h>
-+#include <net-snmp/types.h>
-+#include <net-snmp/library/snmp_debug.h>
-+
-+#ifndef NETSNMP_NO_SYSTEMD
-+
-+/***
-+  Copyright 2010 Lennart Poettering
-+
-+  Permission is hereby granted, free of charge, to any person
-+  obtaining a copy of this software and associated documentation files
-+  (the "Software"), to deal in the Software without restriction,
-+  including without limitation the rights to use, copy, modify, merge,
-+  publish, distribute, sublicense, and/or sell copies of the Software,
-+  and to permit persons to whom the Software is furnished to do so,
-+  subject to the following conditions:
-+
-+  The above copyright notice and this permission notice shall be
-+  included in all copies or substantial portions of the Software.
-+
-+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-+  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-+  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-+  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
-+  BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
-+  ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-+  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-+  SOFTWARE.
-+***/
-+
-+#ifndef _GNU_SOURCE
-+#define _GNU_SOURCE
-+#endif
-+
-+#include <sys/types.h>
-+#include <sys/stat.h>
-+#include <sys/socket.h>
-+#include <sys/un.h>
-+#include <sys/fcntl.h>
-+#include <netinet/in.h>
-+#include <stdlib.h>
-+#include <errno.h>
-+#include <unistd.h>
-+#include <string.h>
-+#include <stdarg.h>
-+#include <stdio.h>
-+#include <stddef.h>
-+#include <limits.h>
-+
-+#include <net-snmp/library/sd-daemon.h>
-+
-+int netsnmp_sd_listen_fds(int unset_environment) {
-+
-+        int r, fd;
-+        const char *e;
-+        char *p = NULL;
-+        unsigned long l;
-+
-+        if (!(e = getenv("LISTEN_PID"))) {
-+                r = 0;
-+                goto finish;
-+        }
-+
-+        errno = 0;
-+        l = strtoul(e, &p, 10);
-+
-+        if (errno != 0) {
-+                r = -errno;
-+                goto finish;
-+        }
-+
-+        if (!p || *p || l <= 0) {
-+                r = -EINVAL;
-+                goto finish;
-+        }
-+
-+        /* Is this for us? */
-+        if (getpid() != (pid_t) l) {
-+                r = 0;
-+                goto finish;
-+        }
-+
-+        if (!(e = getenv("LISTEN_FDS"))) {
-+                r = 0;
-+                goto finish;
-+        }
-+
-+        errno = 0;
-+        l = strtoul(e, &p, 10);
-+
-+        if (errno != 0) {
-+                r = -errno;
-+                goto finish;
-+        }
-+
-+        if (!p || *p) {
-+                r = -EINVAL;
-+                goto finish;
-+        }
-+
-+        for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + (int) l; fd ++) {
-+                int flags;
-+
-+                if ((flags = fcntl(fd, F_GETFD)) < 0) {
-+                        r = -errno;
-+                        goto finish;
-+                }
-+
-+                if (flags & FD_CLOEXEC)
-+                        continue;
-+
-+                if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) < 0) {
-+                        r = -errno;
-+                        goto finish;
-+                }
-+        }
-+
-+        r = (int) l;
-+
-+finish:
-+        if (unset_environment) {
-+                unsetenv("LISTEN_PID");
-+                unsetenv("LISTEN_FDS");
-+        }
-+
-+        return r;
-+}
-+
-+int netsnmp_sd_is_fifo(int fd, const char *path) {
-+        struct stat st_fd;
-+
-+        if (fd < 0)
-+                return -EINVAL;
-+
-+        memset(&st_fd, 0, sizeof(st_fd));
-+        if (fstat(fd, &st_fd) < 0)
-+                return -errno;
-+
-+        if (!S_ISFIFO(st_fd.st_mode))
-+                return 0;
-+
-+        if (path) {
-+                struct stat st_path;
-+
-+                memset(&st_path, 0, sizeof(st_path));
-+                if (stat(path, &st_path) < 0) {
-+
-+                        if (errno == ENOENT || errno == ENOTDIR)
-+                                return 0;
-+
-+                        return -errno;
-+                }
-+
-+                return
-+                        st_path.st_dev == st_fd.st_dev &&
-+                        st_path.st_ino == st_fd.st_ino;
-+        }
-+
-+        return 1;
-+}
-+
-+int netsnmp_sd_is_special(int fd, const char *path) {
-+        struct stat st_fd;
-+
-+        if (fd < 0)
-+                return -EINVAL;
-+
-+        if (fstat(fd, &st_fd) < 0)
-+                return -errno;
-+
-+        if (!S_ISREG(st_fd.st_mode) && !S_ISCHR(st_fd.st_mode))
-+                return 0;
-+
-+        if (path) {
-+                struct stat st_path;
-+
-+                if (stat(path, &st_path) < 0) {
-+
-+                        if (errno == ENOENT || errno == ENOTDIR)
-+                                return 0;
-+
-+                        return -errno;
-+                }
-+
-+                if (S_ISREG(st_fd.st_mode) && S_ISREG(st_path.st_mode))
-+                        return
-+                                st_path.st_dev == st_fd.st_dev &&
-+                                st_path.st_ino == st_fd.st_ino;
-+                else if (S_ISCHR(st_fd.st_mode) && S_ISCHR(st_path.st_mode))
-+                        return st_path.st_rdev == st_fd.st_rdev;
-+                else
-+                        return 0;
-+        }
-+
-+        return 1;
-+}
-+
-+static int sd_is_socket_internal(int fd, int type, int listening) {
-+        struct stat st_fd;
-+
-+        if (fd < 0 || type < 0)
-+                return -EINVAL;
-+
-+        if (fstat(fd, &st_fd) < 0)
-+                return -errno;
-+
-+        if (!S_ISSOCK(st_fd.st_mode))
-+                return 0;
-+
-+        if (type != 0) {
-+                int other_type = 0;
-+                socklen_t l = sizeof(other_type);
-+
-+                if (getsockopt(fd, SOL_SOCKET, SO_TYPE, &other_type, &l) < 0)
-+                        return -errno;
-+
-+                if (l != sizeof(other_type))
-+                        return -EINVAL;
-+
-+                if (other_type != type)
-+                        return 0;
-+        }
-+
-+        if (listening >= 0) {
-+                int accepting = 0;
-+                socklen_t l = sizeof(accepting);
-+
-+                if (getsockopt(fd, SOL_SOCKET, SO_ACCEPTCONN, &accepting, &l) < 0)
-+                        return -errno;
-+
-+                if (l != sizeof(accepting))
-+                        return -EINVAL;
-+
-+                if (!accepting != !listening)
-+                        return 0;
-+        }
-+
-+        return 1;
-+}
-+
-+union sockaddr_union {
-+        struct sockaddr sa;
-+        struct sockaddr_in in4;
-+        struct sockaddr_in6 in6;
-+        struct sockaddr_un un;
-+        struct sockaddr_storage storage;
-+};
-+
-+int netsnmp_sd_is_socket(int fd, int family, int type, int listening) {
-+        int r;
-+
-+        if (family < 0)
-+                return -EINVAL;
-+
-+        if ((r = sd_is_socket_internal(fd, type, listening)) <= 0)
-+                return r;
-+
-+        if (family > 0) {
-+                union sockaddr_union sockaddr;
-+                socklen_t l;
-+
-+                memset(&sockaddr, 0, sizeof(sockaddr));
-+                l = sizeof(sockaddr);
-+
-+                if (getsockname(fd, &sockaddr.sa, &l) < 0)
-+                        return -errno;
-+
-+                if (l < sizeof(sa_family_t))
-+                        return -EINVAL;
-+
-+                return sockaddr.sa.sa_family == family;
-+        }
-+
-+        return 1;
-+}
-+
-+int netsnmp_sd_is_socket_inet(int fd, int family, int type, int listening, uint16_t port) {
-+        union sockaddr_union sockaddr;
-+        socklen_t l;
-+        int r;
-+
-+        if (family != 0 && family != AF_INET && family != AF_INET6)
-+                return -EINVAL;
-+
-+        if ((r = sd_is_socket_internal(fd, type, listening)) <= 0)
-+                return r;
-+
-+        memset(&sockaddr, 0, sizeof(sockaddr));
-+        l = sizeof(sockaddr);
-+
-+        if (getsockname(fd, &sockaddr.sa, &l) < 0)
-+                return -errno;
-+
-+        if (l < sizeof(sa_family_t))
-+                return -EINVAL;
-+
-+        if (sockaddr.sa.sa_family != AF_INET &&
-+            sockaddr.sa.sa_family != AF_INET6)
-+                return 0;
-+
-+        if (family > 0)
-+                if (sockaddr.sa.sa_family != family)
-+                        return 0;
-+
-+        if (port > 0) {
-+                if (sockaddr.sa.sa_family == AF_INET) {
-+                        if (l < sizeof(struct sockaddr_in))
-+                                return -EINVAL;
-+
-+                        return htons(port) == sockaddr.in4.sin_port;
-+                } else {
-+                        if (l < sizeof(struct sockaddr_in6))
-+                                return -EINVAL;
-+
-+                        return htons(port) == sockaddr.in6.sin6_port;
-+                }
-+        }
-+
-+        return 1;
-+}
-+
-+int netsnmp_sd_is_socket_unix(int fd, int type, int listening, const char *path, size_t length) {
-+        union sockaddr_union sockaddr;
-+        socklen_t l;
-+        int r;
-+
-+        if ((r = sd_is_socket_internal(fd, type, listening)) <= 0)
-+                return r;
-+
-+        memset(&sockaddr, 0, sizeof(sockaddr));
-+        l = sizeof(sockaddr);
-+
-+        if (getsockname(fd, &sockaddr.sa, &l) < 0)
-+                return -errno;
-+
-+        if (l < sizeof(sa_family_t))
-+                return -EINVAL;
-+
-+        if (sockaddr.sa.sa_family != AF_UNIX)
-+                return 0;
-+
-+        if (path) {
-+                if (length <= 0)
-+                        length = strlen(path);
-+
-+                if (length <= 0)
-+                        /* Unnamed socket */
-+                        return l == offsetof(struct sockaddr_un, sun_path);
-+
-+                if (path[0])
-+                        /* Normal path socket */
-+                        return
-+                                (l >= offsetof(struct sockaddr_un, sun_path) + length + 1) &&
-+                                memcmp(path, sockaddr.un.sun_path, length+1) == 0;
-+                else
-+                        /* Abstract namespace socket */
-+                        return
-+                                (l == offsetof(struct sockaddr_un, sun_path) + length) &&
-+                                memcmp(path, sockaddr.un.sun_path, length) == 0;
-+        }
-+
-+        return 1;
-+}
-+
-+int netsnmp_sd_notify(int unset_environment, const char *state) {
-+        int fd = -1, r;
-+        struct msghdr msghdr;
-+        struct iovec iovec;
-+        union sockaddr_union sockaddr;
-+        const char *e;
-+
-+        if (!state) {
-+                r = -EINVAL;
-+                goto finish;
-+        }
-+
-+        if (!(e = getenv("NOTIFY_SOCKET")))
-+                return 0;
-+
-+        /* Must be an abstract socket, or an absolute path */
-+        if ((e[0] != '@' && e[0] != '/') || e[1] == 0) {
-+                r = -EINVAL;
-+                goto finish;
-+        }
-+
-+        if ((fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0)) < 0) {
-+                r = -errno;
-+                goto finish;
-+        }
-+
-+        memset(&sockaddr, 0, sizeof(sockaddr));
-+        sockaddr.sa.sa_family = AF_UNIX;
-+        strncpy(sockaddr.un.sun_path, e, sizeof(sockaddr.un.sun_path));
-+
-+        if (sockaddr.un.sun_path[0] == '@')
-+                sockaddr.un.sun_path[0] = 0;
-+
-+        memset(&iovec, 0, sizeof(iovec));
-+        iovec.iov_base = (char *)state;
-+        iovec.iov_len = strlen(state);
-+
-+        memset(&msghdr, 0, sizeof(msghdr));
-+        msghdr.msg_name = &sockaddr;
-+        msghdr.msg_namelen = offsetof(struct sockaddr_un, sun_path) + strlen(e);
-+
-+        if (msghdr.msg_namelen > sizeof(struct sockaddr_un))
-+                msghdr.msg_namelen = sizeof(struct sockaddr_un);
-+
-+        msghdr.msg_iov = &iovec;
-+        msghdr.msg_iovlen = 1;
-+
-+        if (sendmsg(fd, &msghdr, MSG_NOSIGNAL) < 0) {
-+                r = -errno;
-+                goto finish;
-+        }
-+
-+        r = 1;
-+
-+finish:
-+        if (unset_environment)
-+                unsetenv("NOTIFY_SOCKET");
-+
-+        if (fd >= 0)
-+                close(fd);
-+
-+        return r;
-+}
-+
-+int netsnmp_sd_notifyf(int unset_environment, const char *format, ...) {
-+        va_list ap;
-+        char *p = NULL;
-+        int r;
-+
-+        va_start(ap, format);
-+        r = vasprintf(&p, format, ap);
-+        va_end(ap);
-+
-+        if (r < 0 || !p)
-+                return -ENOMEM;
-+
-+        r = netsnmp_sd_notify(unset_environment, p);
-+        free(p);
-+
-+        return r;
-+}
-+
-+int netsnmp_sd_booted(void) {
-+        struct stat a, b;
-+
-+        /* We simply test whether the systemd cgroup hierarchy is
-+         * mounted */
-+
-+        if (lstat("/sys/fs/cgroup", &a) < 0)
-+                return 0;
-+
-+        if (lstat("/sys/fs/cgroup/systemd", &b) < 0)
-+                return 0;
-+
-+        return a.st_dev != b.st_dev;
-+}
-+
-+/* End of original sd-daemon.c from systemd sources */
-+
-+int
-+netsnmp_sd_find_inet_socket(int family, int type, int listening, int port)
-+{
-+    int count, fd;
-+
-+    count = netsnmp_sd_listen_fds(0);
-+    if (count <= 0) {
-+        DEBUGMSGTL(("systemd:find_inet_socket", "No LISTEN_FDS found.\n"));
-+        return 0;
-+    }
-+    DEBUGMSGTL(("systemd:find_inet_socket", "LISTEN_FDS reports %d sockets.\n",
-+            count));
-+
-+    for (fd = 3; fd < 3+count; fd++) {
-+        int rc = netsnmp_sd_is_socket_inet(fd, family, type, listening, port);
-+        if (rc < 0)
-+            DEBUGMSGTL(("systemd:find_inet_socket",
-+                    "sd_is_socket_inet error: %d\n", rc));
-+        if (rc > 0) {
-+            DEBUGMSGTL(("systemd:find_inet_socket",
-+                    "Found the socket in LISTEN_FDS\n"));
-+            return fd;
-+        }
-+    }
-+    DEBUGMSGTL(("systemd:find_inet_socket", "Socket not found in LISTEN_FDS\n"));
-+    return 0;
-+}
-+
-+int
-+netsnmp_sd_find_unix_socket(int type, int listening, const char *path)
-+{
-+    int count, fd;
-+
-+    count = netsnmp_sd_listen_fds(0);
-+    if (count <= 0) {
-+        DEBUGMSGTL(("systemd:find_unix_socket", "No LISTEN_FDS found.\n"));
-+        return 0;
-+    }
-+    DEBUGMSGTL(("systemd:find_unix_socket", "LISTEN_FDS reports %d sockets.\n",
-+            count));
-+
-+    for (fd = 3; fd < 3+count; fd++) {
-+        int rc = netsnmp_sd_is_socket_unix(fd, type, listening, path, 0);
-+        if (rc < 0)
-+            DEBUGMSGTL(("systemd:find_unix_socket",
-+                    "netsnmp_sd_is_socket_unix error: %d\n", rc));
-+        if (rc > 0) {
-+            DEBUGMSGTL(("systemd:find_unix_socket",
-+                    "Found the socket in LISTEN_FDS\n"));
-+            return fd;
-+        }
-+    }
-+    DEBUGMSGTL(("systemd:find_unix_socket", "Socket not found in LISTEN_FDS\n"));
-+    return 0;
-+}
-+
-+#endif /* ! NETSNMP_NO_SYSTEMD */
-diff --git a/snmplib/transports/snmpTCPDomain.c b/snmplib/transports/snmpTCPDomain.c
-index b8bdba4..ab7f3a1 100644
---- a/snmplib/transports/snmpTCPDomain.c
-+++ b/snmplib/transports/snmpTCPDomain.c
-@@ -43,6 +43,10 @@
- #include <net-snmp/library/snmpTCPBaseDomain.h>
- #include <net-snmp/library/tools.h>
- 
-+#ifndef NETSNMP_NO_SYSTEMD
-+#include <net-snmp/library/sd-daemon.h>
-+#endif
-+
- /*
-  * needs to be in sync with the definitions in snmplib/snmpUDPDomain.c
-  * and perl/agent/agent.xs
-@@ -149,6 +153,7 @@ netsnmp_tcp_transport(struct sockaddr_in *addr, int local)
-     netsnmp_transport *t = NULL;
-     netsnmp_udp_addr_pair *addr_pair = NULL;
-     int rc = 0;
-+    int socket_initialized = 0;
- 
- #ifdef NETSNMP_NO_LISTEN_SUPPORT
-     if (local)
-@@ -178,7 +183,19 @@ netsnmp_tcp_transport(struct sockaddr_in *addr, int local)
-     t->domain_length =
-         sizeof(netsnmp_snmpTCPDomain) / sizeof(netsnmp_snmpTCPDomain[0]);
- 
--    t->sock = socket(PF_INET, SOCK_STREAM, 0);
-+#ifndef NETSNMP_NO_SYSTEMD
-+    /*
-+     * Maybe the socket was already provided by systemd...
-+     */
-+    if (local) {
-+        t->sock = netsnmp_sd_find_inet_socket(PF_INET, SOCK_STREAM, 1,
-+                ntohs(addr->sin_port));
-+        if (t->sock)
-+            socket_initialized = 1;
-+    }
-+#endif
-+    if (!socket_initialized)
-+        t->sock = socket(PF_INET, SOCK_STREAM, 0);
-     if (t->sock < 0) {
-         netsnmp_transport_free(t);
-         return NULL;
-@@ -215,11 +232,13 @@ netsnmp_tcp_transport(struct sockaddr_in *addr, int local)
-         setsockopt(t->sock, SOL_SOCKET, SO_REUSEADDR, (void *)&opt,
-                   sizeof(opt));
- 
--        rc = bind(t->sock, (struct sockaddr *)addr, sizeof(struct sockaddr));
--        if (rc != 0) {
--            netsnmp_socketbase_close(t);
--            netsnmp_transport_free(t);
--            return NULL;
-+        if (!socket_initialized) {
-+            rc = bind(t->sock, (struct sockaddr *)addr, sizeof(struct sockaddr));
-+            if (rc != 0) {
-+                netsnmp_socketbase_close(t);
-+                netsnmp_transport_free(t);
-+                return NULL;
-+            }
-         }
- 
-         /*
-@@ -235,12 +254,13 @@ netsnmp_tcp_transport(struct sockaddr_in *addr, int local)
-         /*
-          * Now sit here and wait for connections to arrive.  
-          */
--
--        rc = listen(t->sock, NETSNMP_STREAM_QUEUE_LEN);
--        if (rc != 0) {
--            netsnmp_socketbase_close(t);
--            netsnmp_transport_free(t);
--            return NULL;
-+        if (!socket_initialized) {
-+            rc = listen(t->sock, NETSNMP_STREAM_QUEUE_LEN);
-+            if (rc != 0) {
-+                netsnmp_socketbase_close(t);
-+                netsnmp_transport_free(t);
-+                return NULL;
-+            }
-         }
-         
-         /*
-diff --git a/snmplib/transports/snmpTCPIPv6Domain.c b/snmplib/transports/snmpTCPIPv6Domain.c
-index 3c96856..305a861 100644
---- a/snmplib/transports/snmpTCPIPv6Domain.c
-+++ b/snmplib/transports/snmpTCPIPv6Domain.c
-@@ -49,6 +49,10 @@
- #include <net-snmp/library/snmpTCPBaseDomain.h>
- #include <net-snmp/library/tools.h>
- 
-+#ifndef NETSNMP_NO_SYSTEMD
-+#include <net-snmp/library/sd-daemon.h>
-+#endif
-+
- #include "inet_ntop.h"
- 
- oid netsnmp_TCPIPv6Domain[] = { TRANSPORT_DOMAIN_TCP_IPV6 };
-@@ -140,6 +144,8 @@ netsnmp_tcp6_transport(struct sockaddr_in6 *addr, int local)
- {
-     netsnmp_transport *t = NULL;
-     int             rc = 0;
-+    char           *str = NULL;
-+    int             socket_initialized = 0;
- 
- #ifdef NETSNMP_NO_LISTEN_SUPPORT
-     if (local)
-@@ -174,7 +180,19 @@ netsnmp_tcp6_transport(struct sockaddr_in6 *addr, int local)
-     t->domain = netsnmp_TCPIPv6Domain;
-     t->domain_length = sizeof(netsnmp_TCPIPv6Domain) / sizeof(oid);
- 
--    t->sock = socket(PF_INET6, SOCK_STREAM, 0);
-+#ifndef NETSNMP_NO_SYSTEMD
-+    /*
-+     * Maybe the socket was already provided by systemd...
-+     */
-+    if (local) {
-+        t->sock = netsnmp_sd_find_inet_socket(PF_INET6, SOCK_STREAM, 1,
-+                ntohs(addr->sin6_port));
-+        if (t->sock)
-+            socket_initialized = 1;
-+    }
-+#endif
-+    if (!socket_initialized)
-+        t->sock = socket(PF_INET6, SOCK_STREAM, 0);
-     if (t->sock < 0) {
-         netsnmp_transport_free(t);
-         return NULL;
-@@ -220,12 +238,14 @@ netsnmp_tcp6_transport(struct sockaddr_in6 *addr, int local)
- 
-         setsockopt(t->sock, SOL_SOCKET, SO_REUSEADDR, (void *)&opt, sizeof(opt));
- 
--        rc = bind(t->sock, (struct sockaddr *) addr,
--                 sizeof(struct sockaddr_in6));
--        if (rc != 0) {
--            netsnmp_socketbase_close(t);
--            netsnmp_transport_free(t);
--            return NULL;
-+        if (!socket_initialized) {
-+            rc = bind(t->sock, (struct sockaddr *) addr,
-+                    sizeof(struct sockaddr_in6));
-+            if (rc != 0) {
-+                netsnmp_socketbase_close(t);
-+                netsnmp_transport_free(t);
-+                return NULL;
-+            }
-         }
- 
-         /*
-@@ -242,11 +262,13 @@ netsnmp_tcp6_transport(struct sockaddr_in6 *addr, int local)
-          * Now sit here and wait for connections to arrive.  
-          */
- 
--        rc = listen(t->sock, NETSNMP_STREAM_QUEUE_LEN);
--        if (rc != 0) {
--            netsnmp_socketbase_close(t);
--            netsnmp_transport_free(t);
--            return NULL;
-+        if (!socket_initialized) {
-+            rc = listen(t->sock, NETSNMP_STREAM_QUEUE_LEN);
-+            if (rc != 0) {
-+                netsnmp_socketbase_close(t);
-+                netsnmp_transport_free(t);
-+                return NULL;
-+            }
-         }
-         
-         /*
-diff --git a/snmplib/transports/snmpUDPIPv4BaseDomain.c b/snmplib/transports/snmpUDPIPv4BaseDomain.c
-index c67427b..428e6d6 100644
---- a/snmplib/transports/snmpUDPIPv4BaseDomain.c
-+++ b/snmplib/transports/snmpUDPIPv4BaseDomain.c
-@@ -40,6 +40,10 @@
- 
- #include <net-snmp/library/snmpSocketBaseDomain.h>
- 
-+#ifndef NETSNMP_NO_SYSTEMD
-+#include <net-snmp/library/sd-daemon.h>
-+#endif
-+
- #if (defined(linux) && defined(IP_PKTINFO)) \
-     || defined(IP_RECVDSTADDR) && HAVE_STRUCT_MSGHDR_MSG_CONTROL \
-                                && HAVE_STRUCT_MSGHDR_MSG_FLAGS
-@@ -67,6 +71,7 @@ netsnmp_udpipv4base_transport(struct sockaddr_in *addr, int local)
-     char           *client_socket = NULL;
-     netsnmp_indexed_addr_pair addr_pair;
-     socklen_t       local_addr_len;
-+    int             socket_initialized = 0;
- 
- #ifdef NETSNMP_NO_LISTEN_SUPPORT
-     if (local)
-@@ -91,7 +96,19 @@ netsnmp_udpipv4base_transport(struct sockaddr_in *addr, int local)
-         free(str);
-     }
- 
--    t->sock = socket(PF_INET, SOCK_DGRAM, 0);
-+#ifndef NETSNMP_NO_SYSTEMD
-+    /*
-+     * Maybe the socket was already provided by systemd...
-+     */
-+    if (local) {
-+        t->sock = netsnmp_sd_find_inet_socket(PF_INET, SOCK_DGRAM, -1,
-+                ntohs(addr->sin_port));
-+        if (t->sock)
-+            socket_initialized = 1;
-+    }
-+#endif
-+    if (!socket_initialized)
-+        t->sock = socket(PF_INET, SOCK_DGRAM, 0);
-     DEBUGMSGTL(("UDPBase", "openned socket %d as local=%d\n", t->sock, local)); 
-     if (t->sock < 0) {
-         netsnmp_transport_free(t);
-@@ -141,12 +158,14 @@ netsnmp_udpipv4base_transport(struct sockaddr_in *addr, int local)
-             DEBUGMSGTL(("netsnmp_udp", "set IP_RECVDSTADDR\n"));
-         }
- #endif
--        rc = bind(t->sock, (struct sockaddr *) addr,
--                  sizeof(struct sockaddr));
--        if (rc != 0) {
--            netsnmp_socketbase_close(t);
--            netsnmp_transport_free(t);
--            return NULL;
-+        if (!socket_initialized) {
-+            rc = bind(t->sock, (struct sockaddr *) addr,
-+                    sizeof(struct sockaddr));
-+            if (rc != 0) {
-+                netsnmp_socketbase_close(t);
-+                netsnmp_transport_free(t);
-+                return NULL;
-+            }
-         }
-         t->data = NULL;
-         t->data_length = 0;
-diff --git a/snmplib/transports/snmpUDPIPv6Domain.c b/snmplib/transports/snmpUDPIPv6Domain.c
-index b3eaae4..35b617f 100644
---- a/snmplib/transports/snmpUDPIPv6Domain.c
-+++ b/snmplib/transports/snmpUDPIPv6Domain.c
-@@ -67,6 +67,10 @@ static const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
- #include <net-snmp/library/snmpSocketBaseDomain.h>
- #include <net-snmp/library/tools.h>
- 
-+#ifndef NETSNMP_NO_SYSTEMD
-+#include <net-snmp/library/sd-daemon.h>
-+#endif
-+
- #include "inet_ntop.h"
- #include "inet_pton.h"
- 
-@@ -190,6 +194,8 @@ netsnmp_udp6_transport(struct sockaddr_in6 *addr, int local)
- {
-     netsnmp_transport *t = NULL;
-     int             rc = 0;
-+    char           *str = NULL;
-+    int             socket_initialized = 0;
- 
- #ifdef NETSNMP_NO_LISTEN_SUPPORT
-     if (local)
-@@ -217,7 +223,19 @@ netsnmp_udp6_transport(struct sockaddr_in6 *addr, int local)
-     t->domain_length =
-         sizeof(netsnmp_UDPIPv6Domain) / sizeof(netsnmp_UDPIPv6Domain[0]);
- 
--    t->sock = socket(PF_INET6, SOCK_DGRAM, 0);
-+#ifndef NETSNMP_NO_SYSTEMD
-+    /*
-+     * Maybe the socket was already provided by systemd...
-+     */
-+    if (local) {
-+        t->sock = netsnmp_sd_find_inet_socket(PF_INET6, SOCK_DGRAM, -1,
-+                ntohs(addr->sin6_port));
-+        if (t->sock)
-+            socket_initialized = 1;
-+    }
-+#endif
-+    if (!socket_initialized)
-+        t->sock = socket(PF_INET6, SOCK_DGRAM, 0);
-     if (t->sock < 0) {
-         netsnmp_transport_free(t);
-         return NULL;
-@@ -242,13 +260,14 @@ netsnmp_udp6_transport(struct sockaddr_in6 *addr, int local)
-          } 
-        }
- #endif
--
--        rc = bind(t->sock, (struct sockaddr *) addr,
--                 sizeof(struct sockaddr_in6));
--        if (rc != 0) {
--            netsnmp_socketbase_close(t);
--            netsnmp_transport_free(t);
--            return NULL;
-+        if (!socket_initialized) {
-+            rc = bind(t->sock, (struct sockaddr *) addr,
-+                    sizeof(struct sockaddr_in6));
-+            if (rc != 0) {
-+                netsnmp_socketbase_close(t);
-+                netsnmp_transport_free(t);
-+                return NULL;
-+            }
-         }
-         t->local = (unsigned char*)malloc(18);
-         if (t->local == NULL) {
-diff --git a/snmplib/transports/snmpUnixDomain.c b/snmplib/transports/snmpUnixDomain.c
-index 674dc2b..9f3d3cb 100644
---- a/snmplib/transports/snmpUnixDomain.c
-+++ b/snmplib/transports/snmpUnixDomain.c
-@@ -37,6 +37,10 @@
- #include <net-snmp/library/system.h> /* mkdirhier */
- #include <net-snmp/library/tools.h>
- 
-+#ifndef NETSNMP_NO_SYSTEMD
-+#include <net-snmp/library/sd-daemon.h>
-+#endif
-+
- netsnmp_feature_child_of(transport_unix_socket_all, transport_all)
- netsnmp_feature_child_of(unix_socket_paths, transport_unix_socket_all)
- 
-@@ -295,6 +299,8 @@ netsnmp_unix_transport(struct sockaddr_un *addr, int local)
-     netsnmp_transport *t = NULL;
-     sockaddr_un_pair *sup = NULL;
-     int             rc = 0;
-+    char           *string = NULL;
-+    int             socket_initialized = 0;
- 
- #ifdef NETSNMP_NO_LISTEN_SUPPORT
-     /* SPECIAL CIRCUMSTANCE: We still want AgentX to be able to operate,
-@@ -333,7 +339,18 @@ netsnmp_unix_transport(struct sockaddr_un *addr, int local)
-     t->data_length = sizeof(sockaddr_un_pair);
-     sup = (sockaddr_un_pair *) t->data;
- 
--    t->sock = socket(PF_UNIX, SOCK_STREAM, 0);
-+#ifndef NETSNMP_NO_SYSTEMD
-+    /*
-+     * Maybe the socket was already provided by systemd...
-+     */
-+    if (local) {
-+        t->sock = netsnmp_sd_find_unix_socket(SOCK_STREAM, 1, addr->sun_path);
-+        if (t->sock)
-+            socket_initialized = 1;
-+    }
-+#endif
-+    if (!socket_initialized)
-+        t->sock = socket(PF_UNIX, SOCK_STREAM, 0);
-     if (t->sock < 0) {
-         netsnmp_transport_free(t);
-         return NULL;
-@@ -357,25 +374,26 @@ netsnmp_unix_transport(struct sockaddr_un *addr, int local)
- 
-         t->flags |= NETSNMP_TRANSPORT_FLAG_LISTEN;
- 
--        unlink(addr->sun_path);
--        rc = bind(t->sock, (struct sockaddr *) addr, SUN_LEN(addr));
--
--        if (rc != 0 && errno == ENOENT && create_path) {
--            rc = mkdirhier(addr->sun_path, create_mode, 1);
-+        if (!socket_initialized) {
-+            unlink(addr->sun_path);
-+            rc = bind(t->sock, (struct sockaddr *) addr, SUN_LEN(addr));
-+            if (rc != 0 && errno == ENOENT && create_path) {
-+                rc = mkdirhier(addr->sun_path, create_mode, 1);
-+                if (rc != 0) {
-+                    netsnmp_unix_close(t);
-+                    netsnmp_transport_free(t);
-+                    return NULL;
-+                }
-+                rc = bind(t->sock, (struct sockaddr *) addr, SUN_LEN(addr));
-+            }
-             if (rc != 0) {
-+                DEBUGMSGTL(("netsnmp_unix_transport",
-+                        "couldn't bind \"%s\", errno %d (%s)\n",
-+                        addr->sun_path, errno, strerror(errno)));
-                 netsnmp_unix_close(t);
-                 netsnmp_transport_free(t);
-                 return NULL;
-             }
--            rc = bind(t->sock, (struct sockaddr *) addr, SUN_LEN(addr));
--        }
--        if (rc != 0) {
--            DEBUGMSGTL(("netsnmp_unix_transport",
--                        "couldn't bind \"%s\", errno %d (%s)\n",
--                        addr->sun_path, errno, strerror(errno)));
--            netsnmp_unix_close(t);
--            netsnmp_transport_free(t);
--            return NULL;
-         }
- 
-         /*
-@@ -391,16 +409,17 @@ netsnmp_unix_transport(struct sockaddr_un *addr, int local)
-          * Now sit here and listen for connections to arrive.
-          */
- 
--        rc = listen(t->sock, NETSNMP_STREAM_QUEUE_LEN);
--        if (rc != 0) {
--            DEBUGMSGTL(("netsnmp_unix_transport",
--                        "couldn't listen to \"%s\", errno %d (%s)\n",
--                        addr->sun_path, errno, strerror(errno)));
--            netsnmp_unix_close(t);
--            netsnmp_transport_free(t);
--            return NULL;
-+        if (!socket_initialized) {
-+            rc = listen(t->sock, NETSNMP_STREAM_QUEUE_LEN);
-+            if (rc != 0) {
-+                DEBUGMSGTL(("netsnmp_unix_transport",
-+                            "couldn't listen to \"%s\", errno %d (%s)\n",
-+                            addr->sun_path, errno, strerror(errno)));
-+                netsnmp_unix_close(t);
-+                netsnmp_transport_free(t);
-+                return NULL;
-+            }
-         }
--
-     } else {
-         t->remote = (u_char *)malloc(strlen(addr->sun_path));
-         if (t->remote == NULL) {
-diff --git a/win32/libsnmp/Makefile.in b/win32/libsnmp/Makefile.in
-index 98d83c8..dd5689b 100644
---- a/win32/libsnmp/Makefile.in
-+++ b/win32/libsnmp/Makefile.in
-@@ -42,6 +42,7 @@ LIB32_OBJS= \
-        "$(INTDIR)\read_config.obj" \
-        "$(INTDIR)\readdir.obj" \
-        "$(INTDIR)\scapi.obj" \
-+       "$(INTDIR)\sd-daemon.obj" \
-        "$(INTDIR)\snmp-tc.obj" \
-        "$(INTDIR)\snmp.obj" \
-        "$(INTDIR)\snmpCallbackDomain.obj" \
-@@ -307,6 +308,12 @@ SOURCE=..\..\snmplib\scapi.c
-        $(CPP) $(CPP_PROJ) $(SOURCE)
- 
- 
-+SOURCE=..\..\snmplib\sd-daemon.c
-+
-+"$(INTDIR)\sd-daemon.obj" : $(SOURCE) "$(INTDIR)"
-+       $(CPP) $(CPP_PROJ) $(SOURCE)
-+
-+
- SOURCE="..\..\snmplib\snmp-tc.c"
- 
- "$(INTDIR)\snmp-tc.obj" : $(SOURCE) "$(INTDIR)"
-diff --git a/win32/net-snmp/net-snmp-config.h b/win32/net-snmp/net-snmp-config.h
-index 7791ee0..1eccf42 100644
---- a/win32/net-snmp/net-snmp-config.h
-+++ b/win32/net-snmp/net-snmp-config.h
-@@ -1705,6 +1705,8 @@ enum {
- #define DMALLOC_FUNC_CHECK
- #endif
- 
-+#define NETSNMP_NO_SYSTEMD
-+
- /* #undef NETSNMP_ENABLE_LOCAL_SMUX */
- 
- /* define if agentx transport is to use domain sockets only */
-diff --git a/win32/net-snmp/net-snmp-config.h.in b/win32/net-snmp/net-snmp-config.h.in
-index 5215865..1607bfa 100644
---- a/win32/net-snmp/net-snmp-config.h.in
-+++ b/win32/net-snmp/net-snmp-config.h.in
-@@ -1705,6 +1705,8 @@ enum {
- #define DMALLOC_FUNC_CHECK
- #endif
- 
-+#define NETSNMP_NO_SYSTEMD
-+
- /* #undef NETSNMP_ENABLE_LOCAL_SMUX */
- 
- /* define if agentx transport is to use domain sockets only */
diff --git a/meta-oe/recipes-extended/net-snmp/net-snmp_5.7.1.bb b/meta-oe/recipes-extended/net-snmp/net-snmp_5.7.1.bb
index 83df80acd1..f1e42b5149 100644
--- a/meta-oe/recipes-extended/net-snmp/net-snmp_5.7.1.bb
+++ b/meta-oe/recipes-extended/net-snmp/net-snmp_5.7.1.bb
@@ -1,28 +1,18 @@
 require net-snmp.inc
-inherit systemd
 
-PR = "${INC_PR}.3"
+PR = "${INC_PR}.4"
 LIC_FILES_CHKSUM = "file://README;beginline=3;endline=8;md5=7f7f00ba639ac8e8deb5a622ea24634e"
 
 SRC_URI = "${SOURCEFORGE_MIRROR}/net-snmp/net-snmp-${PV}.tar.gz \
         file://sync-with-5.7-branch.patch \
         file://libnl-3-support.patch \
-        file://systemd-support.patch \
-        file://snmpd.service \
-        file://snmptrapd.service \
         file://init \
         file://snmpd.conf \
         file://snmptrapd.conf"
 
-EXTRA_OECONF += "--disable-embedded-perl --with-perl-modules=no --with-systemd "
+EXTRA_OECONF += "--disable-embedded-perl --with-perl-modules=no"
 EXTRA_OEMAKE = "INSTALL_PREFIX=${D}"
 
-SYSTEMD_PACKAGES = "${PN}-server-snmpd-systemd \
-                    ${PN}-server-snmptrapd-systemd"
-
-SYSTEMD_SERVICE_${PN}-server-snmpd-systemd = "snmpd.service"
-SYSTEMD_SERVICE_${PN}-server-snmptrapd-systemd =  "snmptrapd.service"
-
 do_configure_prepend() {
         gnu-configize -f
         # We better change sources and re-autoconf here, but
@@ -37,6 +27,3 @@ CCACHE = ""
 
 SRC_URI[md5sum] = "c95d08fd5d93df0c11a2e1bdf0e01e0b"
 SRC_URI[sha256sum] = "7c71c9650c65b715356547e20ca2dbe6313944278af8cc19c32a5337f46b181f"
-
-RDEPENDS_${PN}-server-snmpd-systemd = "${PN}-server-snmpd"
-RDEPENDS_${PN}-server-snmptrapd-systemd = "${PN}-server-snmptrapd"