From f3888d76138c9f347e118e3942d5a1dd49b351ff Mon Sep 17 00:00:00 2001
From: Roy Marples <roy@marples.name>
Date: Mon, 14 May 2007 19:50:13 +0000
Subject: [PATCH] Implement FreeBSD's dlfunc function to avoid ISO warnings on
 dlsym - thanks to drizztbsd for find public domain code :)

---
 src/rc-plugin.c | 17 +++++++++++++----
 src/rc-plugin.h | 11 +++++++++++
 src/runscript.c |  4 ++--
 3 files changed, 26 insertions(+), 6 deletions(-)

diff --git a/src/rc-plugin.c b/src/rc-plugin.c
index 2c8bfff5..66ffeb5c 100644
--- a/src/rc-plugin.c
+++ b/src/rc-plugin.c
@@ -29,6 +29,19 @@ typedef struct plugin
 
 static plugin_t *plugins = NULL;
 
+#ifndef __FreeBSD__
+dlfunc_t dlfunc (void * __restrict handle, const char * __restrict symbol)
+{
+	union {
+		void *d;
+		dlfunc_t f;
+	} rv;
+
+	rv.d = dlsym (handle, symbol);
+	return (rv.f);
+}
+#endif
+
 void rc_plugin_load (void)
 {
 	char **files;
@@ -62,11 +75,7 @@ void rc_plugin_load (void)
 		func = rc_xmalloc (sizeof (char *) * len);
 		snprintf (func, len, "_%s_hook", file);
 
-#ifdef __FreeBSD__
 		fptr = (int (*)(rc_hook_t, const char*)) dlfunc (h, func);
-#else
-		fptr = (int (*)(rc_hook_t, const char*)) dlsym (h, func);
-#endif
 		if (! fptr) {
 			eerror ("`%s' does not expose the symbol `%s'", p, func);
 			dlclose (h);
diff --git a/src/rc-plugin.h b/src/rc-plugin.h
index b4391ad0..15d46213 100644
--- a/src/rc-plugin.h
+++ b/src/rc-plugin.h
@@ -12,4 +12,15 @@ void rc_plugin_load ();
 void rc_plugin_unload ();
 void rc_plugin_run (rc_hook_t, const char *value);
 
+/* dlfunc defines needed to avoid ISO errors. FreeBSD has this right :) */
+#ifndef __FreeBSD__
+struct __dlfunc_arg {
+	int	__dlfunc_dummy;
+};
+
+typedef	void (*dlfunc_t) (struct __dlfunc_arg);
+
+dlfunc_t dlfunc (void * __restrict handle, const char * __restrict symbol);
+#endif
+
 #endif
diff --git a/src/runscript.c b/src/runscript.c
index ecbe34cc..82484f13 100644
--- a/src/runscript.c
+++ b/src/runscript.c
@@ -80,8 +80,8 @@ static void setup_selinux (int argc, char **argv)
 		 * which sucks ass
 		 * http://www.opengroup.org/onlinepubs/009695399/functions/dlsym.html
 		 */
-		selinux_run_init_old = (void (*)(void)) dlsym (lib_handle, "selinux_runscript");
-		selinux_run_init_new = (void (*)(int, char **)) dlsym (lib_handle, "selinux_runscript2");
+		selinux_run_init_old = (void (*)(void)) dlfunc (lib_handle, "selinux_runscript");
+		selinux_run_init_new = (void (*)(int, char **)) dlfunc (lib_handle, "selinux_runscript2");
 
 		/* Use new run_init if it rc_exists, else fall back to old */
 		if (selinux_run_init_new)