libc: add ftw / nftw functions
Please see "man 3 ftw" for a description of the
ftw / nftw functions.
This code is taken directly from netbsd unmodified.
Change-Id: Ia4879ac57212b424adf5281b5e92858e216d0f14
diff --git a/libc/include/ftw.h b/libc/include/ftw.h
new file mode 100644
index 0000000..3bebea3
--- /dev/null
+++ b/libc/include/ftw.h
@@ -0,0 +1,62 @@
+/* $NetBSD: ftw.h,v 1.1 2005/12/30 23:07:33 agc Exp $ */
+
+/* From OpenBSD: ftw.h,v 1.1 2003/07/21 21:13:18 millert Exp */
+
+/*
+ * Copyright (c) 2003 Todd C. Miller <Todd.Miller@courtesan.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Sponsored in part by the Defense Advanced Research Projects
+ * Agency (DARPA) and Air Force Research Laboratory, Air Force
+ * Materiel Command, USAF, under agreement number F39502-99-1-0512.
+ */
+
+#ifndef _FTW_H
+#define _FTW_H
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+/*
+ * Valid flags for the 3rd argument to the function that is passed as the
+ * second argument to ftw(3) and nftw(3). Say it three times fast!
+ */
+#define FTW_F 0 /* File. */
+#define FTW_D 1 /* Directory. */
+#define FTW_DNR 2 /* Directory without read permission. */
+#define FTW_DP 3 /* Directory with subdirectories visited. */
+#define FTW_NS 4 /* Unknown type; stat() failed. */
+#define FTW_SL 5 /* Symbolic link. */
+#define FTW_SLN 6 /* Sym link that names a nonexistent file. */
+
+/*
+ * Flags for use as the 4th argument to nftw(3). These may be ORed together.
+ */
+#define FTW_PHYS 0x01 /* Physical walk, don't follow sym links. */
+#define FTW_MOUNT 0x02 /* The walk does not cross a mount point. */
+#define FTW_DEPTH 0x04 /* Subdirs visited before the dir itself. */
+#define FTW_CHDIR 0x08 /* Change to a directory before reading it. */
+
+struct FTW {
+ int base;
+ int level;
+};
+
+__BEGIN_DECLS
+int ftw(const char *, int (*)(const char *, const struct stat *, int), int);
+int nftw(const char *, int (*)(const char *, const struct stat *, int,
+ struct FTW *), int, int);
+__END_DECLS
+
+#endif /* !_FTW_H */