Adding ftw function.

* Makefile (ftw.o): Add to OBJS-y conditionally.

* configure (have_ftw): New variable. New configure test
for nftw.
(gen_config_make): Set up have_ftw make variable.

* ftw.c, ftw.h: New files.

* lib.c (init): Call ftw_init, if compiled in.

* txr.1: Documented.

1 files changed, 29 insertions, 0 deletions

diff --git a/ftw.h b/ftw.h
new file mode 100644
index 00000000..59dbf714
--- /dev/null
+++ b/ftw.h
@@ -0,0 +1,29 @@
+/* Copyright 2016
+ * Kaz Kylheku <kaz@kylheku.com>
+ * Vancouver, Canada
+ * All rights reserved.
+ *
+ * Redistribution of this software in source and binary forms, with or without
+ * modification, is permitted provided that the following two conditions are met.
+ *
+ * Use of this software in any manner constitutes agreement with the disclaimer
+ * which follows the two conditions.
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DAMAGES, HOWEVER CAUSED,
+ * AND UNDER ANY THEORY OF LIABILITY, ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+val ftw_wrap(val dirpath, val fn, val nopenfd, val flags);
+void ftw_init(void);
+