--- a/rvinterf/Makefile	Fri Oct 26 07:29:50 2018 +0000
+++ b/rvinterf/Makefile	Sat Oct 27 23:35:10 2018 +0000
@@ -1,14 +1,16 @@
 PROGDIR=asyncshell ctracedec etmsync lowlevel rvtat tmsh
-LIBDIR=	libasync libg23
+LIBDIR=	libasync libg23 libinterf
 SUBDIR=	${PROGDIR} ${LIBDIR}
 
 INCLUDE_INSTALL_DIR=	/opt/freecalypso/include/rvinterf
 
 all:	${SUBDIR}
 
-asyncshell:	libasync libg23
+asyncshell:	libasync libg23 libinterf
+etmsync:	libinterf
 lowlevel:	libg23
-tmsh:		libasync
+rvtat:		libinterf
+tmsh:		libasync libinterf
 
 ${SUBDIR}: FRC
 	cd $@; ${MAKE} ${MFLAGS}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rvinterf/libinterf/Makefile	Sat Oct 27 23:35:10 2018 +0000
@@ -0,0 +1,13 @@
+CC=	gcc
+CFLAGS=	-O2 -I../include
+OBJS=	connect.o launchrvif.o
+LIB=	libinterf.a
+
+all:	${LIB}
+
+${LIB}:	${OBJS}
+	ar rcu $@ ${OBJS}
+	ranlib $@
+
+clean:
+	rm -f *.[oa] errs

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rvinterf/libinterf/connect.c	Sat Oct 27 23:35:10 2018 +0000
@@ -0,0 +1,56 @@
+/*
+ * Connecting to an already running rvinterf process
+ */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <stdio.h>
+#include <string.h>
+#include <strings.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include "pktmux.h"
+#include "localsock.h"
+#include "exitcodes.h"
+
+char *socket_pathname = "/tmp/rvinterf_socket";
+int sock;
+
+connect_local_socket()
+{
+	/* local socket binding voodoo copied from osmocon */
+	struct sockaddr_un local;
+	unsigned int namelen;
+	int rc;
+
+	sock = socket(AF_UNIX, SOCK_STREAM, 0);
+	if (sock < 0) {
+		perror("socket(AF_UNIX, SOCK_STREAM, 0)");
+		exit(ERROR_UNIX);
+	}
+
+	local.sun_family = AF_UNIX;
+	strncpy(local.sun_path, socket_pathname, sizeof(local.sun_path));
+	local.sun_path[sizeof(local.sun_path) - 1] = '\0';
+
+	/* we use the same magic that X11 uses in Xtranssock.c for
+	 * calculating the proper length of the sockaddr */
+#if defined(BSD44SOCKETS) || defined(__UNIXWARE__)
+	local.sun_len = strlen(local.sun_path);
+#endif
+#if defined(BSD44SOCKETS) || defined(SUN_LEN)
+	namelen = SUN_LEN(&local);
+#else
+	namelen = strlen(local.sun_path) +
+		  offsetof(struct sockaddr_un, sun_path) + 1;
+#endif
+
+	rc = connect(sock, (struct sockaddr *) &local, namelen);
+	if (rc != 0) {
+		perror(socket_pathname);
+		exit(ERROR_RVINTERF);
+	}
+
+	return(0);
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rvinterf/libinterf/launchrvif.c	Sat Oct 27 23:35:10 2018 +0000
@@ -0,0 +1,63 @@
+/*
+ * This module implements the optional "behind the scenes" invokation
+ * of rvinterf from client programs.
+ */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include "exitcodes.h"
+
+static char rvinterf_pathname[] = "/opt/freecalypso/bin/rvinterf";
+
+extern int sock;
+
+char *rvinterf_ttyport, *rvinterf_Bopt, *rvinterf_lopt, *rvinterf_wopt;
+
+launch_rvinterf()
+{
+	int sp[2], rc;
+	char *rvif_argv[11], Sarg[16], **ap;
+
+	rc = socketpair(AF_UNIX, SOCK_STREAM, 0, sp);
+	if (rc < 0) {
+		perror("socketpair");
+		exit(ERROR_UNIX);
+	}
+	sock = sp[0];
+	sprintf(Sarg, "-S%d", sp[1]);
+	ap = rvif_argv;
+	*ap++ = "rvinterf";
+	*ap++ = Sarg;
+	*ap++ = "-n";
+	if (rvinterf_Bopt) {
+		*ap++ = "-B";
+		*ap++ = rvinterf_Bopt;
+	}
+	if (rvinterf_lopt) {
+		*ap++ = "-l";
+		*ap++ = rvinterf_lopt;
+	}
+	if (rvinterf_wopt) {
+		*ap++ = "-w";
+		*ap++ = rvinterf_wopt;
+	}
+	*ap++ = rvinterf_ttyport;
+	*ap = 0;
+	rc = vfork();
+	if (rc < 0) {
+		perror("vfork for launching rvinterf");
+		exit(ERROR_UNIX);
+	}
+	if (!rc) {
+		/* we are in the child - do the exec */
+		close(sp[0]);
+		execv(rvinterf_pathname, rvif_argv);
+		perror(rvinterf_pathname);
+		_exit(1);
+	}
+	close(sp[1]);
+	return 0;
+}