Add implementations of ftw(3) and nftw(3) and the corresponding header

ftw.h.  This is the implementation written by Joel Baker
<fenton@debian.org> for inclusion in NetBSD, but with several
bugfixes.

Obtained from:	Debian

2 files changed, 109 insertions, 1 deletions

diff --git a/include/Makefile b/include/Makefile
index 130e226..28b5294 100644
--- a/include/Makefile
+++ b/include/Makefile
@@ -7,7 +7,8 @@ CLEANFILES= osreldate.h version vers.c
 SUBDIR= arpa protocols rpcsvc rpc
 INCS=	a.out.h ar.h assert.h bitstring.h complex.h cpio.h ctype.h db.h \
 	dirent.h dlfcn.h elf.h elf-hints.h err.h fmtmsg.h fnmatch.h fstab.h \
-	fts.h getopt.h glob.h grp.h hesiod.h histedit.h ieeefp.h ifaddrs.h \
+	fts.h ftw.h getopt.h glob.h grp.h \
+	hesiod.h histedit.h ieeefp.h ifaddrs.h \
 	inttypes.h iso646.h kenv.h langinfo.h libgen.h limits.h link.h \
 	locale.h malloc.h memory.h monetary.h mpool.h ndbm.h netconfig.h \
 	netdb.h nl_types.h nlist.h nss.h nsswitch.h objformat.h paths.h \
diff --git a/include/ftw.h b/include/ftw.h
new file mode 100644
index 0000000..e0cf085
--- /dev/null
+++ b/include/ftw.h
@@ -0,0 +1,107 @@
+/*
+ * Copyright (c) 2003 by Joel Baker.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 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.
+ * 3. Neither the name of the Author nor the names of any contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _FTW_H
+#define _FTW_H
+
+#include <sys/stat.h>
+
+__BEGIN_DECLS
+
+/* Enumerated values for 'flag' when calling [n]ftw */
+
+enum {
+    FTW_D,   /* Directories */
+    FTW_DNR, /* Unreadable directory */
+    FTW_F,   /* Regular files */
+    FTW_SL,  /* Symbolic link */
+    FTW_NS,  /* stat(2) failed */
+
+#if __XSI_VISIBLE /* X/Open */
+
+/* Flags for nftw only */
+
+    FTW_DP, /* Directory, subdirs visited */
+    FTW_SLN, /* Dangling symlink */
+
+#endif /* __XSI_VISIBLE */
+};
+
+#if __XSI_VISIBLE /* X/Open */
+
+/* Enumerated values for 'flags' when calling nftw */
+
+enum {
+    FTW_CHDIR = 1, /* Do a chdir(2) when entering a directory */
+    FTW_DEPTH = 2, /* Report files first (before directory) */
+    FTW_MOUNT = 4, /* Single filesystem */
+    FTW_PHYS  = 8  /* Physical walk; ignore symlinks */
+};
+
+#define FTW_PHYS FTW_PHYS
+#define FTW_MOUNT FTW_MOUNT
+#define FTW_CHDIR FTW_CHDIR
+#define FTW_DEPTH FTW_DEPTH
+
+/* FTW struct for callbacks from nftw */
+
+struct FTW {
+    int base;
+    int level;
+};
+
+#endif /* __XSI_VISIBLE */
+
+/* Typecasts for callback functions */
+
+typedef int (*__ftw_func_t) \
+    (const char *file, const struct stat *status, int flag);
+
+/* ftw: walk a directory tree, calling a function for each element */
+
+extern int ftw (const char *dir, __ftw_func_t func, int descr);
+
+#if __XSI_VISIBLE /* X/Open */
+
+typedef int (*__nftw_func_t) \
+    (const char *file, const struct stat *status, int flag, struct FTW *detail);
+
+/* nftw: walk a directory tree, calling a function for each element; much
+ * like ftw, but with behavior flags and minty freshness.
+ */
+
+extern int nftw (const char *dir, __nftw_func_t func, int descr, int flags);
+
+#endif /* __XSI_VISIBLE */
+
+__END_DECLS
+
+#endif /* _FTW_H */