diff --git a/source/utils/nbio.c b/source/utils/nbio.c
new file mode 100644
index 00000000000..71ac959f117
--- /dev/null
+++ b/source/utils/nbio.c
@@ -0,0 +1,236 @@
+#define NBDEBUG 0
+
+/* 
+   Unix SMB/Netbios implementation.
+   Version 1.9.
+   SMB torture tester
+   Copyright (C) Andrew Tridgell 1997-1998
+   
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#define NO_SYSLOG
+
+#include "includes.h"
+
+#define MAX_FILES 1000
+
+static char buf[70000];
+extern int line_count;
+
+static struct {
+	int fd;
+	int handle;
+} ftable[MAX_FILES];
+
+static struct cli_state *c;
+
+static void sigsegv(int sig)
+{
+	char line[200];
+	printf("segv at line %d\n", line_count);
+	slprintf(line, sizeof(line), "/usr/X11R6/bin/xterm -e gdb /proc/%d/exe %d", 
+		getpid(), getpid());
+	system(line);
+	exit(1);
+}
+
+void nb_setup(struct cli_state *cli)
+{
+	signal(SIGSEGV, sigsegv);
+	/* to be like a true Windows client we need to negotiate oplocks */
+	cli->use_oplocks = True;
+	c = cli;
+}
+
+
+void nb_unlink(char *fname)
+{
+	strupper(fname);
+
+	if (!cli_unlink(c, fname)) {
+#if NBDEBUG
+		printf("(%d) unlink %s failed (%s)\n", 
+		       line_count, fname, cli_errstr(c));
+#endif
+	}
+}
+
+void nb_open(char *fname, int handle, int size)
+{
+	int fd, i;
+	int flags = O_RDWR|O_CREAT;
+	size_t st_size;
+	static int count;
+
+	strupper(fname);
+
+	if (size == 0) flags |= O_TRUNC;
+
+	fd = cli_open(c, fname, flags, DENY_NONE);
+	if (fd == -1) {
+#if NBDEBUG
+		printf("(%d) open %s failed for handle %d (%s)\n", 
+		       line_count, fname, handle, cli_errstr(c));
+#endif
+		return;
+	}
+	cli_getattrE(c, fd, NULL, &st_size, NULL, NULL, NULL);
+	if (size > st_size) {
+#if NBDEBUG
+		printf("(%d) needs expanding %s to %d from %d\n", 
+		       line_count, fname, size, (int)st_size);
+#endif
+	} else if (size < st_size) {
+#if NBDEBUG
+		printf("(%d) needs truncating %s to %d from %d\n", 
+		       line_count, fname, size, (int)st_size);
+#endif
+	}
+	for (i=0;i<MAX_FILES;i++) {
+		if (ftable[i].handle == 0) break;
+	}
+	if (i == MAX_FILES) {
+		printf("file table full for %s\n", fname);
+		exit(1);
+	}
+	ftable[i].handle = handle;
+	ftable[i].fd = fd;
+	if (count++ % 100 == 0) {
+		printf(".");
+	}
+}
+
+void nb_write(int handle, int size, int offset)
+{
+	int i;
+
+	if (buf[0] == 0) memset(buf, 1, sizeof(buf));
+
+	for (i=0;i<MAX_FILES;i++) {
+		if (ftable[i].handle == handle) break;
+	}
+	if (i == MAX_FILES) {
+#if NBDEBUG
+		printf("(%d) nb_write: handle %d was not open size=%d ofs=%d\n", 
+		       line_count, handle, size, offset);
+#endif
+		return;
+	}
+	if (cli_smbwrite(c, ftable[i].fd, buf, offset, size) != size) {
+		printf("(%d) write failed on handle %d\n", 
+		       line_count, handle);
+	}
+}
+
+void nb_read(int handle, int size, int offset)
+{
+	int i, ret;
+
+	for (i=0;i<MAX_FILES;i++) {
+		if (ftable[i].handle == handle) break;
+	}
+	if (i == MAX_FILES) {
+		printf("(%d) nb_read: handle %d was not open size=%d ofs=%d\n", 
+		       line_count, handle, size, offset);
+		return;
+	}
+	if ((ret=cli_read(c, ftable[i].fd, buf, offset, size)) != size) {
+#if NBDEBUG
+		printf("(%d) read failed on handle %d ofs=%d size=%d res=%d\n", 
+		       line_count, handle, offset, size, ret);
+#endif
+	}
+}
+
+void nb_close(int handle)
+{
+	int i;
+	for (i=0;i<MAX_FILES;i++) {
+		if (ftable[i].handle == handle) break;
+	}
+	if (i == MAX_FILES) {
+		printf("(%d) nb_close: handle %d was not open\n", 
+		       line_count, handle);
+		return;
+	}
+	cli_close(c, ftable[i].fd);
+	ftable[i].handle = 0;
+}
+
+void nb_mkdir(char *fname)
+{
+	strupper(fname);
+
+	if (!cli_mkdir(c, fname)) {
+#if NBDEBUG
+		printf("mkdir %s failed (%s)\n", 
+		       fname, cli_errstr(c));
+#endif
+	}
+}
+
+void nb_rmdir(char *fname)
+{
+	strupper(fname);
+
+	if (!cli_rmdir(c, fname)) {
+#if NBDEBUG
+		printf("rmdir %s failed (%s)\n", 
+		       fname, cli_errstr(c));
+#endif
+	}
+}
+
+void nb_rename(char *old, char *new)
+{
+	strupper(old);
+	strupper(new);
+
+	if (!cli_rename(c, old, new)) {
+#if NBDEBUG
+		printf("rename %s %s failed (%s)\n", 
+		       old, new, cli_errstr(c));
+#endif
+	}
+}
+
+
+void nb_stat(char *fname, int size)
+{
+	size_t st_size;
+
+	strupper(fname);
+
+	if (!cli_getatr(c, fname, NULL, &st_size, NULL)) {
+#if NBDEBUG
+		printf("(%d) nb_stat: %s size=%d %s\n", 
+		       line_count, fname, size, cli_errstr(c));
+#endif
+		return;
+	}
+	if (st_size != size) {
+#if NBDEBUG
+		printf("(%d) nb_stat: %s wrong size %d %d\n", 
+		       line_count, fname, (int)st_size, size);
+#endif
+	}
+}
+
+void nb_create(char *fname, int size)
+{
+	nb_open(fname, 5000, size);
+	nb_close(5000);
+}