Index: configure
===================================================================
RCS file: /sndio/sndio/configure,v
retrieving revision 1.31
diff -u -r1.31 configure
--- configure	9 Sep 2015 17:32:30 -0000	1.31
+++ configure	28 Nov 2015 22:44:14 -0000
@@ -54,14 +54,24 @@
 		ldadd="-lrt"
 		user=sndiod
 		so="$so libsndio.so"
-		defs='-D_GNU_SOURCE -DDEV_RANDOM=\\"/dev/urandom\\"'
+		defs='-D_GNU_SOURCE -DDEV_RANDOM=\\"/dev/urandom\\" \\\
+		-DHAVE_SETRESGID -DHAVE_SETRESUID'
+		;;
+	NetBSD)
+		sun=no
+		rmidi=yes
+		user=_sndio
+		so="$so libsndio.so"
+		defs='-DHAVE_ARC4RANDOM -DHAVE_ISSETUGID \\\
+		-DHAVE_STRLCAT -DHAVE_STRLCPY'
 		;;
 	OpenBSD)
 		sun=yes
 		rmidi=yes
 		user=_sndio
 		defs='-DHAVE_ARC4RANDOM -DHAVE_ISSETUGID \\\
-		-DHAVE_STRLCAT -DHAVE_STRLCPY -DHAVE_STRTONUM'
+		-DHAVE_STRLCAT -DHAVE_STRLCPY -DHAVE_STRTONUM \\\
+		-DHAVE_SETRESGID -DHAVE_SETRESUID'
 		;;
 esac
 
Index: sndiod/sndiod.c
===================================================================
RCS file: /sndio/sndio/sndiod/sndiod.c,v
retrieving revision 1.22
diff -u -r1.22 sndiod.c
--- sndiod/sndiod.c	25 Nov 2015 19:50:17 -0000	1.22
+++ sndiod/sndiod.c	28 Nov 2015 22:44:14 -0000
@@ -289,8 +289,18 @@
 	if (setpriority(PRIO_PROCESS, 0, SNDIO_PRIO) < 0)
 		err(1, "setpriority");
 	if (setgroups(1, &pw->pw_gid) ||
-	    setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) ||
-	    setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid))
+#if HAVE_SETRESGID
+	    setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid)
+#else
+	    setegid(pw->pw_gid)
+#endif
+	    ||
+#if HAVE_SETRESUID
+	    setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid)
+#else
+	    seteuid(pw->pw_gid)
+#endif
+	    )
 		err(1, "cannot drop privileges");
 }