+++ /dev/null
-From 098760f7eac1fb86b3f6871d5bb10f9f44468f2d Mon Sep 17 00:00:00 2001
-From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
-Date: Mon, 29 May 2017 23:08:05 +0300
-Subject: [PATCH] Add an implementation of the fts_*() functions
-
-The fts_*() functions are optional in uClibc, and not compiled in our
-default configuration. The best option would be to migrate this
-elfutils code to the nftw family of functions, but it requires quite
-some work.
-
-So we have several options here:
-
- *) Enable fts_*() functions in our default uClibc configuration. Not
- nice since only one package needs them (the help text of uClibc
- for fts_*() functions explicitly mention that they have been added
- to be able to build elfutils).
-
- *) Use gnulib, but it is quite heavy to setup, requires modifications
- to configure.ac, and other things.
-
- *) Copy the fts function from uClibc into elfutils source code. This
- is the solution used below. uClibc is LGPL, and elfutils is
- LGPL/GPL, so there should not be any licensing issue.
-
-Of course, the fts_*() functions are only built if they are not
-already provided by the C library.
-
-Based on the former patch by Thomas Petazzoni.
-
-[Vincent: tweak patch for 0.166]
-
-Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
-Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
----
- configure.ac | 4 +
- libdwfl/Makefile.am | 3 +
- libdwfl/fts.c | 1095 ++++++++++++++++++++++++++++++++++++++++
- libdwfl/fts_.h | 131 +++++
- libdwfl/linux-kernel-modules.c | 4 +
- 5 files changed, 1237 insertions(+)
- create mode 100644 libdwfl/fts.c
- create mode 100644 libdwfl/fts_.h
-
-diff --git a/configure.ac b/configure.ac
-index 7b4c38381cca..bcebb05fa532 100644
---- a/configure.ac
-+++ b/configure.ac
-@@ -265,6 +265,10 @@ AC_ARG_ENABLE([progs],
- enable_progs=yes)
- AM_CONDITIONAL(ENABLE_PROGS, test "$enable_progs" = yes)
-
-+AC_CHECK_HEADER([fts.h],
-+ AC_DEFINE([HAVE_FTS_H], [], [Define if <fts.h> is available in C library]))
-+AM_CONDITIONAL(HAVE_FTS, test "$ac_cv_header_fts_h" = yes)
-+
- dnl zlib is mandatory.
- save_LIBS="$LIBS"
- LIBS=
-diff --git a/libdwfl/Makefile.am b/libdwfl/Makefile.am
-index 89ca92ed8110..a5a5615c5f94 100644
---- a/libdwfl/Makefile.am
-+++ b/libdwfl/Makefile.am
-@@ -77,6 +77,9 @@ endif
- if LZMA
- libdwfl_a_SOURCES += lzma.c
- endif
-+if !HAVE_FTS
-+libdwfl_a_SOURCES += fts.c
-+endif
-
- libdwfl = $(libdw)
- libdw = ../libdw/libdw.so
-diff --git a/libdwfl/fts.c b/libdwfl/fts.c
-new file mode 100644
-index 000000000000..f34cc03bd963
---- /dev/null
-+++ b/libdwfl/fts.c
-@@ -0,0 +1,1095 @@
-+/*-
-+ * 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>
-+
-+/* 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);
-+static FTSENT *fts_build (FTS *, int);
-+static void fts_lfree (FTSENT *);
-+static void fts_load (FTS *, FTSENT *);
-+static size_t fts_maxarglen (char * const *);
-+static void fts_padjust (FTS *, FTSENT *);
-+static int fts_palloc (FTS *, size_t);
-+static FTSENT *fts_sort (FTS *, FTSENT *, int);
-+static u_short fts_stat (FTS *, FTSENT *, int);
-+static int fts_safe_changedir (FTS *, FTSENT *, int, const char *);
-+
-+#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( 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) {
-+ 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) {
-+ 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
-+fts_load(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(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);
-+ 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(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);
-+ 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);
-+ 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(FTS *sp, FTSENT *p, int instr)
-+{
-+ if (instr != 0 && instr != FTS_AGAIN && instr != FTS_FOLLOW &&
-+ instr != FTS_NOINSTR && instr != FTS_SKIP) {
-+ errno = EINVAL;
-+ return (1);
-+ }
-+ p->fts_instr = instr;
-+ return (0);
-+}
-+
-+FTSENT *
-+fts_children(register FTS *sp, int instr)
-+{
-+ register FTSENT *p;
-+ int fd;
-+
-+ if (instr != 0 && instr != FTS_NAMEONLY) {
-+ 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.
-+ */
-+ 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 *
-+fts_build(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);
-+ 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);
-+ 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
-+fts_stat(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)) {
-+ 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 *
-+fts_sort(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 *
-+fts_alloc(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
-+fts_lfree(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
-+fts_palloc(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;
-+ 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
-+fts_padjust(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
-+fts_maxarglen(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
-+fts_safe_changedir(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) {
-+ errno = ENOENT; /* disinformation */
-+ ret = -1;
-+ goto bail;
-+ }
-+ ret = fchdir(newfd);
-+bail:
-+ oerrno = errno;
-+ if (fd < 0)
-+ (void)close(newfd);
-+ errno = oerrno;
-+ return (ret);
-+}
-diff --git a/libdwfl/fts_.h b/libdwfl/fts_.h
-new file mode 100644
-index 000000000000..0a070ba8dce5
---- /dev/null
-+++ b/libdwfl/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/libdwfl/linux-kernel-modules.c b/libdwfl/linux-kernel-modules.c
-index 9d0fef2cf260..47f0e3892294 100644
---- a/libdwfl/linux-kernel-modules.c
-+++ b/libdwfl/linux-kernel-modules.c
-@@ -31,10 +31,14 @@
- Everything we need here is fine if its declarations just come first.
- Also, include sys/types.h before fts. On some systems fts.h is not self
- contained. */
-+#ifdef HAVE_FTS_H
- #ifdef BAD_FTS
- #include <sys/types.h>
- #include <fts.h>
- #endif
-+#else
-+#include <fts_.h>
-+#endif
-
- #include <config.h>
- #include <system.h>
---
-2.11.0
-
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