From 043a6f45dbab10267d0bb81ec5ad9a313669ec35 Mon Sep 17 00:00:00 2001
From: Florian Forster <octo@huhu.verplant.org>
Date: Tue, 19 Aug 2008 09:42:15 +0200
Subject: [PATCH] build system: Check for `kvm_nlist'.

Build the tcpconns plugin if it exists.
---
 configure.in    | 13 +++++++++++++
 src/Makefile.am |  2 +-
 src/tcpconns.c  | 24 +++++++++++++-----------
 3 files changed, 27 insertions(+), 12 deletions(-)

diff --git a/configure.in b/configure.in
index dc3e4ede..e63ee213 100644
--- a/configure.in
+++ b/configure.in
@@ -1251,6 +1251,14 @@ then
 fi
 AM_CONDITIONAL(BUILD_WITH_LIBKVM_GETSWAPINFO, test "x$with_kvm_getswapinfo" = "xyes")
 
+AC_CHECK_LIB(kvm, kvm_nlist, [with_kvm_nlist="yes"], [with_kvm_nlist="no"])
+if test "x$with_kvm_nlist" = "xyes"
+then
+	AC_DEFINE(HAVE_LIBKVM_NLIST, 1,
+		  [Define to 1 if you have the 'kvm' library with the 'kvm_nlist' symbol (-lkvm)])
+fi
+AM_CONDITIONAL(BUILD_WITH_LIBKVM_NLIST, test "x$with_kvm_nlist" = "xyes")
+
 with_sensors_cflags=""
 with_sensors_ldflags=""
 AC_ARG_WITH(lm-sensors, [AS_HELP_STRING([--with-lm-sensors@<:@=PREFIX@:>@], [Path to lm_sensors.])],
@@ -2639,6 +2647,11 @@ then
 	plugin_swap="yes"
 fi
 
+if test "x$with_kvm_nlist" = "xyes"
+then
+	plugin_tcpconns="yes"
+fi
+
 if test "x$have_getutent" = "xyes"
 then
 	plugin_users="yes"
diff --git a/src/Makefile.am b/src/Makefile.am
index 25d30473..55770f0f 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -686,7 +686,7 @@ tcpconns_la_LDFLAGS = -module -avoid-version
 tcpconns_la_LIBADD =
 collectd_LDADD += "-dlopen" tcpconns.la
 collectd_DEPENDENCIES += tcpconns.la
-if BUILD_WITH_LIBKVM
+if BUILD_WITH_LIBKVM_NLIST
 tcpconns_la_LIBADD += -lkvm
 endif
 endif
diff --git a/src/tcpconns.c b/src/tcpconns.c
index d53cb5aa..d39a6c32 100644
--- a/src/tcpconns.c
+++ b/src/tcpconns.c
@@ -20,7 +20,8 @@
  **/
 
 /**
- * Code within `__OpenBSD__' blocks is provided under the following license:
+ * Code within `HAVE_LIBKVM_NLIST' blocks is provided under the following
+ * license:
  *
  * $collectd: parts of tcpconns.c, 2008/08/08 03:48:30 Michael Stapelberg $
  * $OpenBSD: inet.c,v 1.100 2007/06/19 05:28:30 ray Exp $
@@ -58,7 +59,7 @@
 #include "common.h"
 #include "plugin.h"
 
-#if !KERNEL_LINUX && !HAVE_SYSCTLBYNAME && !__OpenBSD__
+#if !KERNEL_LINUX && !HAVE_SYSCTLBYNAME && !HAVE_LIBKVM_NLIST
 # error "No applicable input method."
 #endif
 
@@ -94,7 +95,8 @@
 # include <netinet/tcp_var.h>
 /* #endif HAVE_SYSCTLBYNAME */
 
-#elif __OpenBSD__
+/* This is for OpenBSD and possibly NetBSD. */
+#elif HAVE_LIBKVM_NLIST
 # include <sys/queue.h>
 # include <sys/socket.h>
 # include <net/route.h>
@@ -109,7 +111,7 @@
 # include <arpa/inet.h>
 # include <nlist.h>
 # include <kvm.h>
-#endif /* __OpenBSD__ */
+#endif /* HAVE_LIBKVM_NLIST */
 
 #if KERNEL_LINUX
 static const char *tcp_state[] =
@@ -154,7 +156,7 @@ static const char *tcp_state[] =
 # define TCP_STATE_MAX 10
 /* #endif HAVE_SYSCTLBYNAME */
 
-#elif __OpenBSD__
+#elif HAVE_LIBKVM_NLIST
 static const char *tcp_state[] =
 {
   "CLOSED",
@@ -177,7 +179,7 @@ struct inpcbtable *inpcbtable_ptr = NULL;
 # define TCP_STATE_LISTEN 1
 # define TCP_STATE_MIN 1
 # define TCP_STATE_MAX 10
-#endif /* __OpenBSD__ */
+#endif /* HAVE_LIBKVM_NLIST */
 
 #define PORT_COLLECT_LOCAL  0x01
 #define PORT_COLLECT_REMOTE 0x02
@@ -439,8 +441,8 @@ static int conn_read_file (const char *file)
 #elif HAVE_SYSCTLBYNAME
 /* #endif HAVE_SYSCTLBYNAME */
 
-#elif __OpenBSD__
-#endif /* __OpenBSD__ */
+#elif HAVE_LIBKVM_NLIST
+#endif /* HAVE_LIBKVM_NLIST */
 
 static int conn_config (const char *key, const char *value)
 {
@@ -596,7 +598,7 @@ static int conn_read (void)
 } /* int conn_read */
 /* #endif HAVE_SYSCTLBYNAME */
 
-#elif __OpenBSD__
+#elif HAVE_LIBKVM_NLIST
 static int kread (u_long addr, void *buf, int size)
 {
   int status;
@@ -694,7 +696,7 @@ static int conn_read (void)
 
   return (0);
 }
-#endif /* __OpenBSD__ */
+#endif /* HAVE_LIBKVM_NLIST */
 
 void module_register (void)
 {
@@ -704,7 +706,7 @@ void module_register (void)
 	plugin_register_init ("tcpconns", conn_init);
 #elif HAVE_SYSCTLBYNAME
 	/* no initialization */
-#elif __OpenBSD__
+#elif HAVE_LIBKVM_NLIST
 	plugin_register_init ("tcpconns", conn_init);
 #endif
 	plugin_register_read ("tcpconns", conn_read);
-- 
2.11.0