--- /dev/null
+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.
+
+Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+
+Index: b/configure.ac
+===================================================================
+--- a/configure.ac
++++ b/configure.ac
+@@ -276,6 +276,10 @@
+ fi
+ AC_SUBST(ARGP_LIBS)
+
++AC_CHECK_HEADER([fts.h],
++ AC_DEFINE([HAVE_FTS_H], [], [Define if <fts.h> is available in C library]))
++AM_CONDITIONAL(HAVE_FTS, test "$ac_cv_header_fts_h" = yes)
++
+ dnl Test for zlib and bzlib, gives ZLIB/BZLIB .am
+ dnl conditional and config.h USE_ZLIB/USE_BZLIB #define.
+ save_LIBS="$LIBS"
+Index: b/libdwfl/Makefile.am
+===================================================================
+--- a/libdwfl/Makefile.am
++++ b/libdwfl/Makefile.am
+@@ -79,6 +79,9 @@
+ if LZMA
+ libdwfl_a_SOURCES += lzma.c
+ endif
++if !HAVE_FTS
++libdwfl_a_SOURCES += fts.c
++endif
+
+ if MUDFLAP
+ libdwfl = libdwfl.a $(libdw) $(libebl) $(libelf) $(libeu)
+Index: b/libdwfl/fts.c
+===================================================================
+--- /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);
++}
+Index: b/libdwfl/fts_.h
+===================================================================
+--- /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 */
+Index: b/libdwfl/linux-kernel-modules.c
+===================================================================
+--- a/libdwfl/linux-kernel-modules.c
++++ b/libdwfl/linux-kernel-modules.c
+@@ -29,7 +29,11 @@
+ /* We include this before config.h because it can't handle _FILE_OFFSET_BITS.
+ Everything we need here is fine if its declarations just come first. */
+
++#ifdef HAVE_FTS_H
+ #include <fts.h>
++#else
++#include "fts_.h"
++#endif
+
+ #include <config.h>
+
projects / buildroot.git / commitdiff