[toolchain] uclibc: backport FTS support

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@27513 3c298f89-4303-0410-b956-a3cf2f4a3e73

2 files changed, 1398 insertions, 0 deletions

diff --git a/toolchain/uClibc/config-0.9.32/common b/toolchain/uClibc/config-0.9.32/common
index 13e9572743..df5bc39482 100644
--- a/toolchain/uClibc/config-0.9.32/common
+++ b/toolchain/uClibc/config-0.9.32/common
@@ -107,6 +107,7 @@ UCLIBC_HAS_FNMATCH_OLD=y
 UCLIBC_HAS_FOPEN_EXCLUSIVE_MODE=y
 # UCLIBC_HAS_FOPEN_LARGEFILE_MODE is not set
 # UCLIBC_HAS_FPU is not set
+UCLIBC_HAS_FTS=y
 UCLIBC_HAS_FTW=y
 # UCLIBC_HAS_FULL_RPC is not set
 UCLIBC_HAS_GETPT=y
diff --git a/toolchain/uClibc/patches-0.9.32/970-uclibc_fts.patch b/toolchain/uClibc/patches-0.9.32/970-uclibc_fts.patch
new file mode 100644
index 0000000000..8818996692
--- /dev/null
+++ b/toolchain/uClibc/patches-0.9.32/970-uclibc_fts.patch
@@ -0,0 +1,1397 @@
+From a4aa01c128b04c7174d57a28f61656f966d2bd6c Mon Sep 17 00:00:00 2001
+From: Salvatore Cro <salvatore.cro at st.com>
+Date: Wed, 20 Apr 2011 10:49:25 +0000
+Subject: Added fts support for traversing UNIX file hierarchies.
+
+It is required by libdwfl in elfutils package.
+
+Signed-off-by: Salvatore Cro <salvatore.cro at st.com>
+Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
+---
+diff --git a/Makefile.in b/Makefile.in
+index 0c1f414..5e0bfcd 100644
+--- a/Makefile.in
++++ b/Makefile.in
+@@ -239,6 +239,7 @@ HEADERS_RM-$(UCLIBC_HAS_FLOATS)              += complex.h fpu_control.h ieee754.
+ 	tgmath.h \
+ 	bits/math*.h
+ HEADERS_RM-$(findstring y,$(UCLIBC_HAS_FTW)$(UCLIBC_HAS_NFTW))  += ftw.h
++HEADERS_RM-$(UCLIBC_HAS_FTS)                 += fts.h
+ HEADERS_RM-$(UCLIBC_HAS_GETTEXT_AWARENESS)   += libintl.h
+ HEADERS_RM-$(UCLIBC_HAS_GLIBC_CUSTOM_PRINTF) += printf.h
+ HEADERS_RM-$(UCLIBC_HAS_GLOB)                += glob.h
+diff --git a/extra/Configs/Config.in b/extra/Configs/Config.in
+index 8628f28..ca51aa0 100644
+--- a/extra/Configs/Config.in
++++ b/extra/Configs/Config.in
+@@ -1898,6 +1898,18 @@ config UCLIBC_HAS_FTW
+ 	  This interface is rarely used, and adds around 4.5k.  Unless you have
+ 	  a pressing need for ftw(), you should probably answer N.
+ 
++config UCLIBC_HAS_FTS
++	bool "Support the fts() interface (bsd-compat)"
++	default n
++	help
++	  The fts functions are provided for traversing UNIX file hierarchies.
++
++	  This interface is currently used by the elfutils and adds
++	  around 7.5k.
++	  You should port your application to use the POSIX nftw()
++	  interface.
++
++	  Unless you need to build/use elfutils, you should prolly answer N.
+ 
+ config UCLIBC_HAS_GLOB
+ 	bool "Support the glob() interface"
+diff --git a/include/fts.h b/include/fts.h
+new file mode 100644
+index 0000000..0a070ba
+--- a/dev/null
++++ b/include/fts.h
+@@ -0,0 +1,131 @@
++/*
++ * Copyright (c) 1989, 1993
++ *	The Regents of the University of California.  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.
++ * 4. Neither the name of the University nor the names of its contributors
++ *    may be used to endorse or promote products derived from this software
++ *    without specific prior written permission.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
++ *
++ *	@(#)fts.h	8.3 (Berkeley) 8/14/94
++ */
++
++#ifndef	_FTS_H
++#define	_FTS_H 1
++
++#include <features.h>
++#include <sys/types.h>
++
++/* The fts interface is incompatible with the LFS interface which
++   transparently uses the 64-bit file access functions.  */
++#ifdef __USE_FILE_OFFSET64
++# error "<fts.h> cannot be used with -D_FILE_OFFSET_BITS==64"
++#endif
++
++
++typedef struct {
++	struct _ftsent *fts_cur;	/* current node */
++	struct _ftsent *fts_child;	/* linked list of children */
++	struct _ftsent **fts_array;	/* sort array */
++	dev_t fts_dev;			/* starting device # */
++	char *fts_path;			/* path for this descent */
++	int fts_rfd;			/* fd for root */
++	int fts_pathlen;		/* sizeof(path) */
++	int fts_nitems;			/* elements in the sort array */
++	int (*fts_compar) (const void *, const void *); /* compare fn */
++
++#define	FTS_COMFOLLOW	0x0001		/* follow command line symlinks */
++#define	FTS_LOGICAL	0x0002		/* logical walk */
++#define	FTS_NOCHDIR	0x0004		/* don't change directories */
++#define	FTS_NOSTAT	0x0008		/* don't get stat info */
++#define	FTS_PHYSICAL	0x0010		/* physical walk */
++#define	FTS_SEEDOT	0x0020		/* return dot and dot-dot */
++#define	FTS_XDEV	0x0040		/* don't cross devices */
++#define FTS_WHITEOUT	0x0080		/* return whiteout information */
++#define	FTS_OPTIONMASK	0x00ff		/* valid user option mask */
++
++#define	FTS_NAMEONLY	0x0100		/* (private) child names only */
++#define	FTS_STOP	0x0200		/* (private) unrecoverable error */
++	int fts_options;		/* fts_open options, global flags */
++} FTS;
++
++typedef struct _ftsent {
++	struct _ftsent *fts_cycle;	/* cycle node */
++	struct _ftsent *fts_parent;	/* parent directory */
++	struct _ftsent *fts_link;	/* next file in directory */
++	long fts_number;	        /* local numeric value */
++	void *fts_pointer;	        /* local address value */
++	char *fts_accpath;		/* access path */
++	char *fts_path;			/* root path */
++	int fts_errno;			/* errno for this node */
++	int fts_symfd;			/* fd for symlink */
++	u_short fts_pathlen;		/* strlen(fts_path) */
++	u_short fts_namelen;		/* strlen(fts_name) */
++
++	ino_t fts_ino;			/* inode */
++	dev_t fts_dev;			/* device */
++	nlink_t fts_nlink;		/* link count */
++
++#define	FTS_ROOTPARENTLEVEL	-1
++#define	FTS_ROOTLEVEL		 0
++	short fts_level;		/* depth (-1 to N) */
++
++#define	FTS_D		 1		/* preorder directory */
++#define	FTS_DC		 2		/* directory that causes cycles */
++#define	FTS_DEFAULT	 3		/* none of the above */
++#define	FTS_DNR		 4		/* unreadable directory */
++#define	FTS_DOT		 5		/* dot or dot-dot */
++#define	FTS_DP		 6		/* postorder directory */
++#define	FTS_ERR		 7		/* error; errno is set */
++#define	FTS_F		 8		/* regular file */
++#define	FTS_INIT	 9		/* initialized only */
++#define	FTS_NS		10		/* stat(2) failed */
++#define	FTS_NSOK	11		/* no stat(2) requested */
++#define	FTS_SL		12		/* symbolic link */
++#define	FTS_SLNONE	13		/* symbolic link without target */
++#define FTS_W		14		/* whiteout object */
++	u_short fts_info;		/* user flags for FTSENT structure */
++
++#define	FTS_DONTCHDIR	 0x01		/* don't chdir .. to the parent */
++#define	FTS_SYMFOLLOW	 0x02		/* followed a symlink to get here */
++	u_short fts_flags;		/* private flags for FTSENT structure */
++
++#define	FTS_AGAIN	 1		/* read node again */
++#define	FTS_FOLLOW	 2		/* follow symbolic link */
++#define	FTS_NOINSTR	 3		/* no instructions */
++#define	FTS_SKIP	 4		/* discard node */
++	u_short fts_instr;		/* fts_set() instructions */
++
++	struct stat *fts_statp;		/* stat(2) information */
++	char fts_name[1];		/* file name */
++} FTSENT;
++
++__BEGIN_DECLS
++FTSENT	*fts_children (FTS *, int);
++int	 fts_close (FTS *);
++FTS	*fts_open (char * const *, int,
++		   int (*)(const FTSENT **, const FTSENT **));
++FTSENT	*fts_read (FTS *);
++int	 fts_set (FTS *, FTSENT *, int) __THROW;
++__END_DECLS
++
++#endif /* fts.h */
+diff --git a/libc/misc/Makefile.in b/libc/misc/Makefile.in
+index 6c09d31..e01b3dc 100644
+--- a/libc/misc/Makefile.in
++++ b/libc/misc/Makefile.in
+@@ -16,6 +16,7 @@ include $(top_srcdir)libc/misc/elf/Makefile.in
+ include $(top_srcdir)libc/misc/file/Makefile.in
+ include $(top_srcdir)libc/misc/fnmatch/Makefile.in
+ include $(top_srcdir)libc/misc/ftw/Makefile.in
++include $(top_srcdir)libc/misc/fts/Makefile.in
+ include $(top_srcdir)libc/misc/glob/Makefile.in
+ include $(top_srcdir)libc/misc/gnu/Makefile.in
+ include $(top_srcdir)libc/misc/internals/Makefile.in
+diff --git a/libc/misc/fts/Makefile b/libc/misc/fts/Makefile
+new file mode 100644
+index 0000000..1361db3
+--- a/dev/null
++++ b/libc/misc/fts/Makefile
+@@ -0,0 +1,14 @@
++# Makefile for uClibc
++#
++# Copyright (C) 2009 STMicroelectronics Ltd.
++# Author: Salvatore Cro <salvatore.cro at st.com>
++#
++# Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
++#
++
++top_srcdir=../../../
++top_builddir=../../../
++all: objs
++include $(top_builddir)Rules.mak
++include Makefile.in
++include $(top_srcdir)Makerules
+diff --git a/libc/misc/fts/Makefile.in b/libc/misc/fts/Makefile.in
+new file mode 100644
+index 0000000..a1d0efa
+--- a/dev/null
++++ b/libc/misc/fts/Makefile.in
+@@ -0,0 +1,23 @@
++# FTS Makefile for uClibc
++#
++# Copyright (C) 2009 STMicroelectronics Ltd.
++# Author: Salvatore Cro <salvatore.cro at st.com>
++#
++# Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
++#
++
++subdirs += libc/misc/fts
++CSRC := fts.c
++
++MISC_FTS_DIR := $(top_srcdir)libc/misc/fts
++MISC_FTS_OUT := $(top_builddir)libc/misc/fts
++
++MISC_FTS_SRC := $(patsubst %.c,$(MISC_FTS_DIR)/%.c,$(CSRC))
++MISC_FTS_OBJ := $(patsubst %.c,$(MISC_FTS_OUT)/%.o,$(CSRC))
++
++libc-$(UCLIBC_HAS_FTS) += $(MISC_FTS_OBJ)
++
++objclean-y += CLEAN_libc/misc/fts
++
++CLEAN_libc/misc/fts:
++	$(do_rm) $(addprefix $(MISC_FTS_OUT)/*., o os)
+diff --git a/libc/misc/fts/fts.c b/libc/misc/fts/fts.c
+new file mode 100644
+index 0000000..ce5d158
+--- a/dev/null
++++ b/libc/misc/fts/fts.c
+@@ -0,0 +1,1145 @@
++/*-
++ * Copyright (c) 1990, 1993, 1994
++ *	The Regents of the University of California.  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.
++ * 4. Neither the name of the University nor the names of its contributors
++ *    may be used to endorse or promote products derived from this software
++ *    without specific prior written permission.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
++ */
++
++#include <sys/param.h>
++#include <sys/stat.h>
++#include <fcntl.h>
++#include <dirent.h>
++#include <errno.h>
++#include <fts.h>
++#include <stdlib.h>
++#include <string.h>
++#include <unistd.h>
++
++#ifdef __UCLIBC_HAS_LFS__
++# include <_lfs_64.h>
++#else
++# define stat64 stat
++# define fstat64 fstat
++#endif
++
++/* Largest alignment size needed, minus one.
++   Usually long double is the worst case.  */
++#ifndef ALIGNBYTES
++#define ALIGNBYTES	(__alignof__ (long double) - 1)
++#endif
++/* Align P to that size.  */
++#ifndef ALIGN
++#define	ALIGN(p)	(((unsigned long int) (p) + ALIGNBYTES) & ~ALIGNBYTES)
++#endif
++
++
++static FTSENT	*fts_alloc (FTS *, const char *, size_t) internal_function;
++static FTSENT	*fts_build (FTS *, int) internal_function;
++static void	 fts_lfree (FTSENT *) internal_function;
++static void	 fts_load (FTS *, FTSENT *) internal_function;
++static size_t	 fts_maxarglen (char * const *) internal_function;
++static void	 fts_padjust (FTS *, FTSENT *) internal_function;
++static int	 fts_palloc (FTS *, size_t) internal_function;
++static FTSENT	*fts_sort (FTS *, FTSENT *, int) internal_function;
++static u_short	 fts_stat (FTS *, FTSENT *, int) internal_function;
++static int      fts_safe_changedir (FTS *, FTSENT *, int, const char *)
++     internal_function;
++
++#ifndef MAX
++#define MAX(a, b)	({ __typeof__ (a) _a = (a); \
++			   __typeof__ (b) _b = (b); \
++			   _a > _b ? _a : _b; })
++#endif
++
++#define	ISDOT(a)	(a[0] == '.' && (!a[1] || (a[1] == '.' && !a[2])))
++
++#define CLR(opt)	(sp->fts_options &= ~(opt))
++#define	ISSET(opt)	(sp->fts_options & (opt))
++#define	SET(opt)	(sp->fts_options |= (opt))
++
++#define	FCHDIR(sp, fd)	(!ISSET(FTS_NOCHDIR) && fchdir(fd))
++
++/* fts_build flags */
++#define	BCHILD		1		/* fts_children */
++#define	BNAMES		2		/* fts_children, names only */
++#define	BREAD		3		/* fts_read */
++
++FTS *
++fts_open(argv, options, compar)
++	char * const *argv;
++	register int options;
++	int (*compar) (const FTSENT **, const FTSENT **);
++{
++	register FTS *sp;
++	register FTSENT *p, *root;
++	register int nitems;
++	FTSENT *parent = NULL;
++	FTSENT *tmp = NULL;
++
++	/* Options check. */
++	if (options & ~FTS_OPTIONMASK) {
++		__set_errno (EINVAL);
++		return (NULL);
++	}
++
++	/* Allocate/initialize the stream */
++	if ((sp = malloc((u_int)sizeof(FTS))) == NULL)
++		return (NULL);
++	memset(sp, 0, sizeof(FTS));
++	sp->fts_compar = (int (*) (const void *, const void *)) compar;
++	sp->fts_options = options;
++
++	/* Logical walks turn on NOCHDIR; symbolic links are too hard. */
++	if (ISSET(FTS_LOGICAL))
++		SET(FTS_NOCHDIR);
++
++	/*
++	 * Start out with 1K of path space, and enough, in any case,
++	 * to hold the user's paths.
++	 */
++#ifndef MAXPATHLEN
++#define MAXPATHLEN 1024
++#endif
++	size_t maxarglen = fts_maxarglen(argv);
++	if (fts_palloc(sp, MAX(maxarglen, MAXPATHLEN)))
++		goto mem1;
++
++	/* Allocate/initialize root's parent. */
++	if (*argv != NULL) {
++		if ((parent = fts_alloc(sp, "", 0)) == NULL)
++			goto mem2;
++		parent->fts_level = FTS_ROOTPARENTLEVEL;
++	  }
++
++	/* Allocate/initialize root(s). */
++	for (root = NULL, nitems = 0; *argv != NULL; ++argv, ++nitems) {
++		/* Don't allow zero-length paths. */
++		size_t len = strlen(*argv);
++		if (len == 0) {
++			__set_errno (ENOENT);
++			goto mem3;
++		}
++
++		p = fts_alloc(sp, *argv, len);
++		p->fts_level = FTS_ROOTLEVEL;
++		p->fts_parent = parent;
++		p->fts_accpath = p->fts_name;
++		p->fts_info = fts_stat(sp, p, ISSET(FTS_COMFOLLOW));
++
++		/* Command-line "." and ".." are real directories. */
++		if (p->fts_info == FTS_DOT)
++			p->fts_info = FTS_D;
++
++		/*
++		 * If comparison routine supplied, traverse in sorted
++		 * order; otherwise traverse in the order specified.
++		 */
++		if (compar) {
++			p->fts_link = root;
++			root = p;
++		} else {
++			p->fts_link = NULL;
++			if (root == NULL)
++				tmp = root = p;
++			else {
++				tmp->fts_link = p;
++				tmp = p;
++			}
++		}
++	}
++	if (compar && nitems > 1)
++		root = fts_sort(sp, root, nitems);
++
++	/*
++	 * Allocate a dummy pointer and make fts_read think that we've just
++	 * finished the node before the root(s); set p->fts_info to FTS_INIT
++	 * so that everything about the "current" node is ignored.
++	 */
++	if ((sp->fts_cur = fts_alloc(sp, "", 0)) == NULL)
++		goto mem3;
++	sp->fts_cur->fts_link = root;
++	sp->fts_cur->fts_info = FTS_INIT;
++
++	/*
++	 * If using chdir(2), grab a file descriptor pointing to dot to ensure
++	 * that we can get back here; this could be avoided for some paths,
++	 * but almost certainly not worth the effort.  Slashes, symbolic links,
++	 * and ".." are all fairly nasty problems.  Note, if we can't get the
++	 * descriptor we run anyway, just more slowly.
++	 */
++	if (!ISSET(FTS_NOCHDIR)
++	    && (sp->fts_rfd = open(".", O_RDONLY, 0)) < 0)
++		SET(FTS_NOCHDIR);
++
++	return (sp);
++
++mem3:	fts_lfree(root);
++	free(parent);
++mem2:	free(sp->fts_path);
++mem1:	free(sp);
++	return (NULL);
++}
++
++static void
++internal_function
++fts_load(sp, p)
++	FTS *sp;
++	register FTSENT *p;
++{
++	register int len;
++	register char *cp;
++
++	/*
++	 * Load the stream structure for the next traversal.  Since we don't
++	 * actually enter the directory until after the preorder visit, set
++	 * the fts_accpath field specially so the chdir gets done to the right
++	 * place and the user can access the first node.  From fts_open it's
++	 * known that the path will fit.
++	 */
++	len = p->fts_pathlen = p->fts_namelen;
++	memmove(sp->fts_path, p->fts_name, len + 1);
++	if ((cp = strrchr(p->fts_name, '/')) && (cp != p->fts_name || cp[1])) {
++		len = strlen(++cp);
++		memmove(p->fts_name, cp, len + 1);
++		p->fts_namelen = len;
++	}
++	p->fts_accpath = p->fts_path = sp->fts_path;
++	sp->fts_dev = p->fts_dev;
++}
++
++int
++fts_close(sp)
++	FTS *sp;
++{
++	register FTSENT *freep, *p;
++	int saved_errno;
++
++	/*
++	 * This still works if we haven't read anything -- the dummy structure
++	 * points to the root list, so we step through to the end of the root
++	 * list which has a valid parent pointer.
++	 */
++	if (sp->fts_cur) {
++		for (p = sp->fts_cur; p->fts_level >= FTS_ROOTLEVEL;) {
++			freep = p;
++			p = p->fts_link != NULL ? p->fts_link : p->fts_parent;
++			free(freep);
++		}
++		free(p);
++	}
++
++	/* Free up child linked list, sort array, path buffer. */
++	if (sp->fts_child)
++		fts_lfree(sp->fts_child);
++	free(sp->fts_array);
++	free(sp->fts_path);
++
++	/* Return to original directory, save errno if necessary. */
++	if (!ISSET(FTS_NOCHDIR)) {
++		saved_errno = fchdir(sp->fts_rfd) ? errno : 0;
++		(void)close(sp->fts_rfd);
++
++		/* Set errno and return. */
++		if (saved_errno != 0) {
++			/* Free up the stream pointer. */
++			free(sp);
++			__set_errno (saved_errno);
++			return (-1);
++		}
++	}
++
++	/* Free up the stream pointer. */
++	free(sp);
++	return (0);
++}
++
++/*
++ * Special case of "/" at the end of the path so that slashes aren't
++ * appended which would cause paths to be written as "....//foo".
++ */
++#define	NAPPEND(p)							\
++	(p->fts_path[p->fts_pathlen - 1] == '/'				\
++	    ? p->fts_pathlen - 1 : p->fts_pathlen)
++
++FTSENT *
++fts_read(sp)
++	register FTS *sp;
++{
++	register FTSENT *p, *tmp;
++	register int instr;
++	register char *t;
++	int saved_errno;
++
++	/* If finished or unrecoverable error, return NULL. */
++	if (sp->fts_cur == NULL || ISSET(FTS_STOP))
++		return (NULL);
++
++	/* Set current node pointer. */
++	p = sp->fts_cur;
++
++	/* Save and zero out user instructions. */
++	instr = p->fts_instr;
++	p->fts_instr = FTS_NOINSTR;
++
++	/* Any type of file may be re-visited; re-stat and re-turn. */
++	if (instr == FTS_AGAIN) {
++		p->fts_info = fts_stat(sp, p, 0);
++		return (p);
++	}
++
++	/*
++	 * Following a symlink -- SLNONE test allows application to see
++	 * SLNONE and recover.  If indirecting through a symlink, have
++	 * keep a pointer to current location.  If unable to get that
++	 * pointer, follow fails.
++	 */
++	if (instr == FTS_FOLLOW &&
++	    (p->fts_info == FTS_SL || p->fts_info == FTS_SLNONE)) {
++		p->fts_info = fts_stat(sp, p, 1);
++		if (p->fts_info == FTS_D && !ISSET(FTS_NOCHDIR)) {
++			if ((p->fts_symfd = open(".", O_RDONLY, 0)) < 0) {
++				p->fts_errno = errno;
++				p->fts_info = FTS_ERR;
++			} else
++				p->fts_flags |= FTS_SYMFOLLOW;
++		}
++		return (p);
++	}
++
++	/* Directory in pre-order. */
++	if (p->fts_info == FTS_D) {
++		/* If skipped or crossed mount point, do post-order visit. */
++		if (instr == FTS_SKIP ||
++		    (ISSET(FTS_XDEV) && p->fts_dev != sp->fts_dev)) {
++			if (p->fts_flags & FTS_SYMFOLLOW)
++				(void)close(p->fts_symfd);
++			if (sp->fts_child) {
++				fts_lfree(sp->fts_child);
++				sp->fts_child = NULL;
++			}
++			p->fts_info = FTS_DP;
++			return (p);
++		}
++
++		/* Rebuild if only read the names and now traversing. */
++		if (sp->fts_child != NULL && ISSET(FTS_NAMEONLY)) {
++			CLR(FTS_NAMEONLY);
++			fts_lfree(sp->fts_child);
++			sp->fts_child = NULL;
++		}
++
++		/*
++		 * Cd to the subdirectory.
++		 *
++		 * If have already read and now fail to chdir, whack the list
++		 * to make the names come out right, and set the parent errno
++		 * so the application will eventually get an error condition.
++		 * Set the FTS_DONTCHDIR flag so that when we logically change
++		 * directories back to the parent we don't do a chdir.
++		 *
++		 * If haven't read do so.  If the read fails, fts_build sets
++		 * FTS_STOP or the fts_info field of the node.
++		 */
++		if (sp->fts_child != NULL) {
++			if (fts_safe_changedir(sp, p, -1, p->fts_accpath)) {
++				p->fts_errno = errno;
++				p->fts_flags |= FTS_DONTCHDIR;
++				for (p = sp->fts_child; p != NULL;
++				     p = p->fts_link)
++					p->fts_accpath =
++					    p->fts_parent->fts_accpath;
++			}
++		} else if ((sp->fts_child = fts_build(sp, BREAD)) == NULL) {
++			if (ISSET(FTS_STOP))
++				return (NULL);
++			return (p);
++		}
++		p = sp->fts_child;
++		sp->fts_child = NULL;
++		sp->fts_cur = p;
++		goto name;
++	}
++
++	/* Move to the next node on this level. */
++next:	tmp = p;
++	if ((p = p->fts_link) != NULL) {
++		sp->fts_cur = p;
++		free(tmp);
++
++		/*
++		 * If reached the top, return to the original directory (or
++		 * the root of the tree), and load the paths for the next root.
++		 */
++		if (p->fts_level == FTS_ROOTLEVEL) {
++			if (FCHDIR(sp, sp->fts_rfd)) {
++				SET(FTS_STOP);
++				return (NULL);
++			}
++			fts_load(sp, p);
++			return p;
++		}
++
++		/*
++		 * User may have called fts_set on the node.  If skipped,
++		 * ignore.  If followed, get a file descriptor so we can
++		 * get back if necessary.
++		 */
++		if (p->fts_instr == FTS_SKIP)
++			goto next;
++		if (p->fts_instr == FTS_FOLLOW) {
++			p->fts_info = fts_stat(sp, p, 1);
++			if (p->fts_info == FTS_D && !ISSET(FTS_NOCHDIR)) {
++				if ((p->fts_symfd =
++				    open(".", O_RDONLY, 0)) < 0) {
++					p->fts_errno = errno;
++					p->fts_info = FTS_ERR;
++				} else
++					p->fts_flags |= FTS_SYMFOLLOW;
++			}
++			p->fts_instr = FTS_NOINSTR;
++		}
++
++name:		t = sp->fts_path + NAPPEND(p->fts_parent);
++		*t++ = '/';
++		memmove(t, p->fts_name, p->fts_namelen + 1);
++		return p;
++	}
++
++	/* Move up to the parent node. */
++	p = tmp->fts_parent;
++	sp->fts_cur = p;
++	free(tmp);
++
++	if (p->fts_level == FTS_ROOTPARENTLEVEL) {
++		/*
++		 * Done; free everything up and set errno to 0 so the user
++		 * can distinguish between error and EOF.
++		 */
++		free(p);
++		__set_errno (0);
++		return (sp->fts_cur = NULL);
++	}
++
++	/* NUL terminate the pathname. */
++	sp->fts_path[p->fts_pathlen] = '\0';
++
++	/*
++	 * Return to the parent directory.  If at a root node or came through
++	 * a symlink, go back through the file descriptor.  Otherwise, cd up
++	 * one directory.
++	 */
++	if (p->fts_level == FTS_ROOTLEVEL) {
++		if (FCHDIR(sp, sp->fts_rfd)) {
++			SET(FTS_STOP);
++			return (NULL);
++		}
++	} else if (p->fts_flags & FTS_SYMFOLLOW) {
++		if (FCHDIR(sp, p->fts_symfd)) {
++			saved_errno = errno;
++			(void)close(p->fts_symfd);
++			__set_errno (saved_errno);
++			SET(FTS_STOP);
++			return (NULL);
++		}
++		(void)close(p->fts_symfd);
++	} else if (!(p->fts_flags & FTS_DONTCHDIR) &&
++		   fts_safe_changedir(sp, p->fts_parent, -1, "..")) {
++		SET(FTS_STOP);
++		return (NULL);
++	}
++	p->fts_info = p->fts_errno ? FTS_ERR : FTS_DP;
++	return p;
++}
++
++/*
++ * Fts_set takes the stream as an argument although it's not used in this
++ * implementation; it would be necessary if anyone wanted to add global
++ * semantics to fts using fts_set.  An error return is allowed for similar
++ * reasons.
++ */
++/* ARGSUSED */
++int
++fts_set(sp, p, instr)
++	FTS *sp;
++	FTSENT *p;
++	int instr;
++{
++	if (instr != 0 && instr != FTS_AGAIN && instr != FTS_FOLLOW &&
++	    instr != FTS_NOINSTR && instr != FTS_SKIP) {
++		__set_errno (EINVAL);
++		return (1);
++	}
++	p->fts_instr = instr;
++	return (0);
++}
++
++FTSENT *
++fts_children(sp, instr)
++	register FTS *sp;
++	int instr;
++{
++	register FTSENT *p;
++	int fd;
++
++	if (instr != 0 && instr != FTS_NAMEONLY) {
++		__set_errno (EINVAL);
++		return (NULL);
++	}
++
++	/* Set current node pointer. */
++	p = sp->fts_cur;
++
++	/*
++	 * Errno set to 0 so user can distinguish empty directory from
++	 * an error.
++	 */
++	__set_errno (0);
++
++	/* Fatal errors stop here. */
++	if (ISSET(FTS_STOP))
++		return (NULL);
++
++	/* Return logical hierarchy of user's arguments. */
++	if (p->fts_info == FTS_INIT)
++		return (p->fts_link);
++
++	/*
++	 * If not a directory being visited in pre-order, stop here.  Could
++	 * allow FTS_DNR, assuming the user has fixed the problem, but the
++	 * same effect is available with FTS_AGAIN.
++	 */
++	if (p->fts_info != FTS_D /* && p->fts_info != FTS_DNR */)
++		return (NULL);
++
++	/* Free up any previous child list. */
++	if (sp->fts_child != NULL)
++		fts_lfree(sp->fts_child);
++
++	if (instr == FTS_NAMEONLY) {
++		SET(FTS_NAMEONLY);
++		instr = BNAMES;
++	} else
++		instr = BCHILD;
++
++	/*
++	 * If using chdir on a relative path and called BEFORE fts_read does
++	 * its chdir to the root of a traversal, we can lose -- we need to
++	 * chdir into the subdirectory, and we don't know where the current
++	 * directory is, so we can't get back so that the upcoming chdir by
++	 * fts_read will work.
++	 */
++	if (p->fts_level != FTS_ROOTLEVEL || p->fts_accpath[0] == '/' ||
++	    ISSET(FTS_NOCHDIR))
++		return (sp->fts_child = fts_build(sp, instr));
++
++	if ((fd = open(".", O_RDONLY, 0)) < 0)
++		return (NULL);
++	sp->fts_child = fts_build(sp, instr);
++	if (fchdir(fd))
++		return (NULL);
++	(void)close(fd);
++	return (sp->fts_child);
++}
++
++/*
++ * This is the tricky part -- do not casually change *anything* in here.  The
++ * idea is to build the linked list of entries that are used by fts_children
++ * and fts_read.  There are lots of special cases.
++ *
++ * The real slowdown in walking the tree is the stat calls.  If FTS_NOSTAT is
++ * set and it's a physical walk (so that symbolic links can't be directories),
++ * we can do things quickly.  First, if it's a 4.4BSD file system, the type
++ * of the file is in the directory entry.  Otherwise, we assume that the number
++ * of subdirectories in a node is equal to the number of links to the parent.
++ * The former skips all stat calls.  The latter skips stat calls in any leaf
++ * directories and for any files after the subdirectories in the directory have
++ * been found, cutting the stat calls by about 2/3.
++ */
++static FTSENT *
++internal_function
++fts_build(sp, type)
++	register FTS *sp;
++	int type;
++{
++	register struct dirent *dp;
++	register FTSENT *p, *head;
++	register int nitems;
++	FTSENT *cur, *tail;
++	DIR *dirp;
++	void *oldaddr;
++	int cderrno, descend, len, level, nlinks, saved_errno,
++	    nostat, doadjust;
++	size_t maxlen;
++	char *cp;
++
++	/* Set current node pointer. */
++	cur = sp->fts_cur;
++
++	/*
++	 * Open the directory for reading.  If this fails, we're done.
++	 * If being called from fts_read, set the fts_info field.
++	 */
++#if defined FTS_WHITEOUT && 0
++	if (ISSET(FTS_WHITEOUT))
++		oflag = DTF_NODUP|DTF_REWIND;
++	else
++		oflag = DTF_HIDEW|DTF_NODUP|DTF_REWIND;
++#else
++# define opendir2(path, flag) opendir(path)
++#endif
++       if ((dirp = opendir2(cur->fts_accpath, oflag)) == NULL) {
++		if (type == BREAD) {
++			cur->fts_info = FTS_DNR;
++			cur->fts_errno = errno;
++		}
++		return (NULL);
++	}
++
++	/*
++	 * Nlinks is the number of possible entries of type directory in the
++	 * directory if we're cheating on stat calls, 0 if we're not doing
++	 * any stat calls at all, -1 if we're doing stats on everything.
++	 */
++	if (type == BNAMES) {
++		nlinks = 0;
++		/* Be quiet about nostat, GCC. */
++		nostat = 0;
++	} else if (ISSET(FTS_NOSTAT) && ISSET(FTS_PHYSICAL)) {
++		nlinks = cur->fts_nlink - (ISSET(FTS_SEEDOT) ? 0 : 2);
++		nostat = 1;
++	} else {
++		nlinks = -1;
++		nostat = 0;
++	}
++
++#ifdef notdef
++	(void)printf("nlinks == %d (cur: %d)\n", nlinks, cur->fts_nlink);
++	(void)printf("NOSTAT %d PHYSICAL %d SEEDOT %d\n",
++	    ISSET(FTS_NOSTAT), ISSET(FTS_PHYSICAL), ISSET(FTS_SEEDOT));
++#endif
++	/*
++	 * If we're going to need to stat anything or we want to descend
++	 * and stay in the directory, chdir.  If this fails we keep going,
++	 * but set a flag so we don't chdir after the post-order visit.
++	 * We won't be able to stat anything, but we can still return the
++	 * names themselves.  Note, that since fts_read won't be able to
++	 * chdir into the directory, it will have to return different path
++	 * names than before, i.e. "a/b" instead of "b".  Since the node
++	 * has already been visited in pre-order, have to wait until the
++	 * post-order visit to return the error.  There is a special case
++	 * here, if there was nothing to stat then it's not an error to
++	 * not be able to stat.  This is all fairly nasty.  If a program
++	 * needed sorted entries or stat information, they had better be
++	 * checking FTS_NS on the returned nodes.
++	 */
++	cderrno = 0;
++	if (nlinks || type == BREAD) {
++		if (fts_safe_changedir(sp, cur, dirfd(dirp), NULL)) {
++			if (nlinks && type == BREAD)
++				cur->fts_errno = errno;
++			cur->fts_flags |= FTS_DONTCHDIR;
++			descend = 0;
++			cderrno = errno;
++			(void)closedir(dirp);
++			dirp = NULL;
++		} else
++			descend = 1;
++	} else
++		descend = 0;
++
++	/*
++	 * Figure out the max file name length that can be stored in the
++	 * current path -- the inner loop allocates more path as necessary.
++	 * We really wouldn't have to do the maxlen calculations here, we
++	 * could do them in fts_read before returning the path, but it's a
++	 * lot easier here since the length is part of the dirent structure.
++	 *
++	 * If not changing directories set a pointer so that can just append
++	 * each new name into the path.
++	 */
++	len = NAPPEND(cur);
++	if (ISSET(FTS_NOCHDIR)) {
++		cp = sp->fts_path + len;
++		*cp++ = '/';
++	} else {
++		/* GCC, you're too verbose. */
++		cp = NULL;
++	}
++	len++;
++	maxlen = sp->fts_pathlen - len;
++
++	level = cur->fts_level + 1;
++
++	/* Read the directory, attaching each entry to the `link' pointer. */
++	doadjust = 0;
++	for (head = tail = NULL, nitems = 0; dirp && (dp = readdir(dirp));) {
++		if (!ISSET(FTS_SEEDOT) && ISDOT(dp->d_name))
++			continue;
++
++		if ((p = fts_alloc(sp, dp->d_name, _D_EXACT_NAMLEN (dp))) == NULL)
++			goto mem1;
++		if (_D_EXACT_NAMLEN (dp) >= maxlen) {/* include space for NUL */
++			oldaddr = sp->fts_path;
++			if (fts_palloc(sp, _D_EXACT_NAMLEN (dp) + len + 1)) {
++				/*
++				 * No more memory for path or structures.  Save
++				 * errno, free up the current structure and the
++				 * structures already allocated.
++				 */
++mem1:				saved_errno = errno;
++				free(p);
++				fts_lfree(head);
++				(void)closedir(dirp);
++				cur->fts_info = FTS_ERR;
++				SET(FTS_STOP);
++				__set_errno (saved_errno);
++				return (NULL);
++			}
++			/* Did realloc() change the pointer? */
++			if (oldaddr != sp->fts_path) {
++				doadjust = 1;
++				if (ISSET(FTS_NOCHDIR))
++					cp = sp->fts_path + len;
++			}
++			maxlen = sp->fts_pathlen - len;
++		}
++
++		if (len + _D_EXACT_NAMLEN (dp) >= USHRT_MAX) {
++			/*
++			 * In an FTSENT, fts_pathlen is a u_short so it is
++			 * possible to wraparound here.  If we do, free up
++			 * the current structure and the structures already
++			 * allocated, then error out with ENAMETOOLONG.
++			 */
++			free(p);
++			fts_lfree(head);
++			(void)closedir(dirp);
++			cur->fts_info = FTS_ERR;
++			SET(FTS_STOP);
++			__set_errno (ENAMETOOLONG);
++			return (NULL);
++		}
++		p->fts_level = level;
++		p->fts_parent = sp->fts_cur;
++		p->fts_pathlen = len + _D_EXACT_NAMLEN (dp);
++
++#if defined FTS_WHITEOUT && 0
++		if (dp->d_type == DT_WHT)
++			p->fts_flags |= FTS_ISW;
++#endif
++
++#if 0
++		/* Unreachable code.  cderrno is only ever set to a nonnull
++		   value if dirp is closed at the same time.  But then we
++		   cannot enter this loop.  */
++		if (cderrno) {
++			if (nlinks) {
++				p->fts_info = FTS_NS;
++				p->fts_errno = cderrno;
++			} else
++				p->fts_info = FTS_NSOK;
++			p->fts_accpath = cur->fts_accpath;
++		} else
++#endif
++		if (nlinks == 0
++#if defined DT_DIR && defined _DIRENT_HAVE_D_TYPE
++			   || (nostat &&
++			       dp->d_type != DT_DIR && dp->d_type != DT_UNKNOWN)
++#endif
++		    ) {
++			p->fts_accpath =
++			    ISSET(FTS_NOCHDIR) ? p->fts_path : p->fts_name;
++			p->fts_info = FTS_NSOK;
++		} else {
++			/* Build a file name for fts_stat to stat. */
++			if (ISSET(FTS_NOCHDIR)) {
++				p->fts_accpath = p->fts_path;
++				memmove(cp, p->fts_name, p->fts_namelen + 1);
++			} else
++				p->fts_accpath = p->fts_name;
++			/* Stat it. */
++			p->fts_info = fts_stat(sp, p, 0);
++
++			/* Decrement link count if applicable. */
++			if (nlinks > 0 && (p->fts_info == FTS_D ||
++			    p->fts_info == FTS_DC || p->fts_info == FTS_DOT))
++				--nlinks;
++		}
++
++		/* We walk in directory order so "ls -f" doesn't get upset. */
++		p->fts_link = NULL;
++		if (head == NULL)
++			head = tail = p;
++		else {
++			tail->fts_link = p;
++			tail = p;
++		}
++		++nitems;
++	}
++	if (dirp)
++		(void)closedir(dirp);
++
++	/*
++	 * If realloc() changed the address of the path, adjust the
++	 * addresses for the rest of the tree and the dir list.
++	 */
++	if (doadjust)
++		fts_padjust(sp, head);
++
++	/*
++	 * If not changing directories, reset the path back to original
++	 * state.
++	 */
++	if (ISSET(FTS_NOCHDIR)) {
++		if (len == sp->fts_pathlen || nitems == 0)
++			--cp;
++		*cp = '\0';
++	}
++
++	/*
++	 * If descended after called from fts_children or after called from
++	 * fts_read and nothing found, get back.  At the root level we use
++	 * the saved fd; if one of fts_open()'s arguments is a relative path
++	 * to an empty directory, we wind up here with no other way back.  If
++	 * can't get back, we're done.
++	 */
++	if (descend && (type == BCHILD || !nitems) &&
++	    (cur->fts_level == FTS_ROOTLEVEL ?
++	     FCHDIR(sp, sp->fts_rfd) :
++	     fts_safe_changedir(sp, cur->fts_parent, -1, ".."))) {
++		cur->fts_info = FTS_ERR;
++		SET(FTS_STOP);
++		fts_lfree(head);
++		return (NULL);
++	}
++
++	/* If didn't find anything, return NULL. */
++	if (!nitems) {
++		if (type == BREAD)
++			cur->fts_info = FTS_DP;
++		fts_lfree(head);
++		return (NULL);
++	}
++
++	/* Sort the entries. */
++	if (sp->fts_compar && nitems > 1)
++		head = fts_sort(sp, head, nitems);
++	return (head);
++}
++
++static u_short
++internal_function
++fts_stat(sp, p, follow)
++	FTS *sp;
++	register FTSENT *p;
++	int follow;
++{
++	register FTSENT *t;
++	register dev_t dev;
++	register ino_t ino;
++	struct stat *sbp, sb;
++	int saved_errno;
++
++	/* If user needs stat info, stat buffer already allocated. */
++	sbp = ISSET(FTS_NOSTAT) ? &sb : p->fts_statp;
++
++#if defined FTS_WHITEOUT && 0
++	/* check for whiteout */
++	if (p->fts_flags & FTS_ISW) {
++		if (sbp != &sb) {
++			memset(sbp, '\0', sizeof (*sbp));
++			sbp->st_mode = S_IFWHT;
++		}
++		return (FTS_W);
++       }
++#endif
++
++	/*
++	 * If doing a logical walk, or application requested FTS_FOLLOW, do
++	 * a stat(2).  If that fails, check for a non-existent symlink.  If
++	 * fail, set the errno from the stat call.
++	 */
++	if (ISSET(FTS_LOGICAL) || follow) {
++		if (stat(p->fts_accpath, sbp)) {
++			saved_errno = errno;
++			if (!lstat(p->fts_accpath, sbp)) {
++				__set_errno (0);
++				return (FTS_SLNONE);
++			}
++			p->fts_errno = saved_errno;
++			goto err;
++		}
++	} else if (lstat(p->fts_accpath, sbp)) {
++		p->fts_errno = errno;
++err:		memset(sbp, 0, sizeof(struct stat));
++		return (FTS_NS);
++	}
++
++	if (S_ISDIR(sbp->st_mode)) {
++		/*
++		 * Set the device/inode.  Used to find cycles and check for
++		 * crossing mount points.  Also remember the link count, used
++		 * in fts_build to limit the number of stat calls.  It is
++		 * understood that these fields are only referenced if fts_info
++		 * is set to FTS_D.
++		 */
++		dev = p->fts_dev = sbp->st_dev;
++		ino = p->fts_ino = sbp->st_ino;
++		p->fts_nlink = sbp->st_nlink;
++
++		if (ISDOT(p->fts_name))
++			return (FTS_DOT);
++
++		/*
++		 * Cycle detection is done by brute force when the directory
++		 * is first encountered.  If the tree gets deep enough or the
++		 * number of symbolic links to directories is high enough,
++		 * something faster might be worthwhile.
++		 */
++		for (t = p->fts_parent;
++		    t->fts_level >= FTS_ROOTLEVEL; t = t->fts_parent)
++			if (ino == t->fts_ino && dev == t->fts_dev) {
++				p->fts_cycle = t;
++				return (FTS_DC);
++			}
++		return (FTS_D);
++	}
++	if (S_ISLNK(sbp->st_mode))
++		return (FTS_SL);
++	if (S_ISREG(sbp->st_mode))
++		return (FTS_F);
++	return (FTS_DEFAULT);
++}
++
++static FTSENT *
++internal_function
++fts_sort(sp, head, nitems)
++	FTS *sp;
++	FTSENT *head;
++	register int nitems;
++{
++	register FTSENT **ap, *p;
++
++	/*
++	 * Construct an array of pointers to the structures and call qsort(3).
++	 * Reassemble the array in the order returned by qsort.  If unable to
++	 * sort for memory reasons, return the directory entries in their
++	 * current order.  Allocate enough space for the current needs plus
++	 * 40 so don't realloc one entry at a time.
++	 */
++	if (nitems > sp->fts_nitems) {
++		struct _ftsent **a;
++
++		sp->fts_nitems = nitems + 40;
++		if ((a = realloc(sp->fts_array,
++ 		    (size_t)(sp->fts_nitems * sizeof(FTSENT *)))) == NULL) {
++			free(sp->fts_array);
++			sp->fts_array = NULL;
++			sp->fts_nitems = 0;
++			return (head);
++		}
++		sp->fts_array = a;
++	}
++	for (ap = sp->fts_array, p = head; p; p = p->fts_link)
++		*ap++ = p;
++	qsort((void *)sp->fts_array, nitems, sizeof(FTSENT *), sp->fts_compar);
++	for (head = *(ap = sp->fts_array); --nitems; ++ap)
++		ap[0]->fts_link = ap[1];
++	ap[0]->fts_link = NULL;
++	return (head);
++}
++
++static FTSENT *
++internal_function
++fts_alloc(sp, name, namelen)
++	FTS *sp;
++	const char *name;
++	size_t namelen;
++{
++	register FTSENT *p;
++	size_t len;
++
++	/*
++	 * The file name is a variable length array and no stat structure is
++	 * necessary if the user has set the nostat bit.  Allocate the FTSENT
++	 * structure, the file name and the stat structure in one chunk, but
++	 * be careful that the stat structure is reasonably aligned.  Since the
++	 * fts_name field is declared to be of size 1, the fts_name pointer is
++	 * namelen + 2 before the first possible address of the stat structure.
++	 */
++	len = sizeof(FTSENT) + namelen;
++	if (!ISSET(FTS_NOSTAT))
++		len += sizeof(struct stat) + ALIGNBYTES;
++	if ((p = malloc(len)) == NULL)
++		return (NULL);
++
++	/* Copy the name and guarantee NUL termination. */
++	memmove(p->fts_name, name, namelen);
++	p->fts_name[namelen] = '\0';
++
++	if (!ISSET(FTS_NOSTAT))
++		p->fts_statp = (struct stat *)ALIGN(p->fts_name + namelen + 2);
++	p->fts_namelen = namelen;
++	p->fts_path = sp->fts_path;
++	p->fts_errno = 0;
++	p->fts_flags = 0;
++	p->fts_instr = FTS_NOINSTR;
++	p->fts_number = 0;
++	p->fts_pointer = NULL;
++	return (p);
++}
++
++static void
++internal_function
++fts_lfree(head)
++	register FTSENT *head;
++{
++	register FTSENT *p;
++
++	/* Free a linked list of structures. */
++	while ((p = head)) {
++		head = head->fts_link;
++		free(p);
++	}
++}
++
++/*
++ * Allow essentially unlimited paths; find, rm, ls should all work on any tree.
++ * Most systems will allow creation of paths much longer than MAXPATHLEN, even
++ * though the kernel won't resolve them.  Add the size (not just what's needed)
++ * plus 256 bytes so don't realloc the path 2 bytes at a time.
++ */
++static int
++internal_function
++fts_palloc(sp, more)
++	FTS *sp;
++	size_t more;
++{
++	char *p;
++
++	sp->fts_pathlen += more + 256;
++	/*
++	 * Check for possible wraparound.  In an FTS, fts_pathlen is
++	 * a signed int but in an FTSENT it is an unsigned short.
++	 * We limit fts_pathlen to USHRT_MAX to be safe in both cases.
++	 */
++	if (sp->fts_pathlen < 0 || sp->fts_pathlen >= USHRT_MAX) {
++		free(sp->fts_path);
++		sp->fts_path = NULL;
++		__set_errno (ENAMETOOLONG);
++		return (1);
++	}
++	p = realloc(sp->fts_path, sp->fts_pathlen);
++	if (p == NULL) {
++		free(sp->fts_path);
++		sp->fts_path = NULL;
++		return 1;
++	}
++	sp->fts_path = p;
++	return 0;
++}
++
++/*
++ * When the path is realloc'd, have to fix all of the pointers in structures
++ * already returned.
++ */
++static void
++internal_function
++fts_padjust(sp, head)
++	FTS *sp;
++	FTSENT *head;
++{
++	FTSENT *p;
++	char *addr = sp->fts_path;
++
++#define	ADJUST(p) do {							\
++	if ((p)->fts_accpath != (p)->fts_name) {			\
++		(p)->fts_accpath =					\
++		    (char *)addr + ((p)->fts_accpath - (p)->fts_path);	\
++	}								\
++	(p)->fts_path = addr;						\
++} while (0)
++	/* Adjust the current set of children. */
++	for (p = sp->fts_child; p; p = p->fts_link)
++		ADJUST(p);
++
++	/* Adjust the rest of the tree, including the current level. */
++	for (p = head; p->fts_level >= FTS_ROOTLEVEL;) {
++		ADJUST(p);
++		p = p->fts_link ? p->fts_link : p->fts_parent;
++	}
++}
++
++static size_t
++internal_function
++fts_maxarglen(argv)
++	char * const *argv;
++{
++	size_t len, max;
++
++	for (max = 0; *argv; ++argv)
++		if ((len = strlen(*argv)) > max)
++			max = len;
++	return (max + 1);
++}
++
++/*
++ * Change to dir specified by fd or p->fts_accpath without getting
++ * tricked by someone changing the world out from underneath us.
++ * Assumes p->fts_dev and p->fts_ino are filled in.
++ */
++static int
++internal_function
++fts_safe_changedir(sp, p, fd, path)
++	FTS *sp;
++	FTSENT *p;
++	int fd;
++	const char *path;
++{
++	int ret, oerrno, newfd;
++	struct stat64 sb;
++
++	newfd = fd;
++	if (ISSET(FTS_NOCHDIR))
++		return (0);
++	if (fd < 0 && (newfd = open(path, O_RDONLY, 0)) < 0)
++		return (-1);
++	if (fstat64(newfd, &sb)) {
++		ret = -1;
++		goto bail;
++	}
++	if (p->fts_dev != sb.st_dev || p->fts_ino != sb.st_ino) {
++		__set_errno (ENOENT);		/* disinformation */
++		ret = -1;
++		goto bail;
++	}
++	ret = fchdir(newfd);
++bail:
++	oerrno = errno;
++	if (fd < 0)
++		(void)close(newfd);
++	__set_errno (oerrno);
++	return (ret);
++}
+--
+cgit v0.9.0.1-2-gef13
+