diff options
| -rw-r--r-- | package/elfutils/elfutils-04-fts.patch | 1307 |
1 files changed, 1307 insertions, 0 deletions
diff --git a/package/elfutils/elfutils-04-fts.patch b/package/elfutils/elfutils-04-fts.patch new file mode 100644 index 000000000..7318236d2 --- /dev/null +++ b/package/elfutils/elfutils-04-fts.patch @@ -0,0 +1,1307 @@ +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> + |