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--- Libc/Libc-1725.40.4/gen/fts.c
+++ /dev/null
@@ -1,1652 +0,0 @@
-/*
- * Copyright (c) 1999, 2000, 2003, 2005, 2008, 2012, 2016 Apple Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
-/*
- * 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.
- * 3. 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.
- */
-
-/* $OpenBSD: fts.c,v 1.51 2015/09/12 13:32:24 guenther Exp $ */
-
-#include <sys/param.h>
-#include <sys/stat.h>
-
-#include <dirent.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <fts.h>
-#include <limits.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <stdbool.h>
-#include <sys/vnode.h>
-#include <sys/attr.h>
-#include <os/assumes.h>
-#include <pthread/private.h>
-
-#ifdef __BLOCKS__
-#include <Block.h>
-#endif /* __BLOCKS__ */
-#include <malloc_private.h>
-
-#pragma clang diagnostic push
-#pragma clang diagnostic ignored "-Wstrict-prototypes"
-
-static FTSENT *fts_alloc(FTS *, char *, ssize_t);
-static FTSENT *fts_build(FTS *, int);
-static void fts_free(FTSENT *);
-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, int);
-static u_short fts_stat2(FTS *, FTSENT *, int, int, struct stat *);
-static int fts_safe_changedir(FTS *, FTSENT *, int, char *);
-static int fts_fchdir(FTS *, int);
-
-#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) && fts_fchdir(sp, fd))
-
-/* fts_build flags */
-#define BCHILD 1 /* fts_children */
-#define BNAMES 2 /* fts_children, names only */
-#define BREAD 3 /* fts_read */
-
-/* 5653270
- * For directories containing > 64k subdirectories (or HFS+ with > 64k files
- * and subdirectories), struct stat's st_nlink (16 bits) will overflow. This
- * causes the case with FTS_NOSTAT and FTS_PHYSICAL set to prematurely stop
- * recursing into subdirectories, because of an optimization that expects
- * st_nlink to be the number of subdirectories (once that number has been
- * encountered, no further calls to stat should be needed).
- *
- * However, on Mac OS X, another optimization largely nullifies the st_nlink
- * optimization. struct dirent contains d_type, which can distinguish
- * directories from files without initially calling stat. So stat is only
- * called on known directories, rather than on other files. With this
- * optimization, the difference in also using the st_nlink optimization is
- * pretty minimal (tests show an improvement of a percent or two, probably
- * due to additional if statement clauses that need to be evaluated).
- *
- * So removing the st_nlink optimization code will fix the > 64k subdirectories
- * problem. And if we replace the multiple if clause logic with a single
- * switch statement, we can recover the minimal performance lose. We can
- * go even further and for the case of FTS_NOSTAT and FTS_LOGICAL set, we
- * can use d_type to also distinguish symbolic links, and so we only need to
- * call stat on directories and symlinks, not on all files. This provides
- * a significant performance boost in that special case.
- */
-/*
- * The following macros defines values of the dostat variable, which is or-ed
- * with the value of d_type, and the result used in a switch statement to
- * determine whether to call stat or not. (We order the macros to minimize
- * the size of any jump table that the compiler may generate.)
- */
-#define F_SHIFT 4 /* shift to leave space for d_type */
-#define F_NOSTAT (0 << F_SHIFT) /* don't do any stat's */
-#define F_STATDIRSYM (1 << F_SHIFT) /* only stat directories and symlinks (and unknowns) */
-#define F_ALWAYSSTAT (2 << F_SHIFT) /* always stat */
-#define F_STATDIR (3 << F_SHIFT) /* only stat directories (and unknowns) */
-#define F_D_TYPE (4 << F_SHIFT) /* only stat directories but use d_type */
-#define F_D_TYPESYM (5 << F_SHIFT) /* only stat directories and symlinks but use d_type */
-
-static FTS *
-__fts_open(char * const *argv, FTS *sp)
-{
- FTSENT *p, *root;
- int nitems;
- FTSENT *parent, *tmp;
- ssize_t len;
-
- /* 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.
- */
- if (fts_palloc(sp, MAX(fts_maxarglen(argv), PATH_MAX)))
- goto mem1;
-
- /* Allocate/initialize root's parent. */
- if ((parent = fts_alloc(sp, "", 0)) == NULL)
- goto mem2;
- parent->fts_level = FTS_ROOTPARENTLEVEL;
-
- /* Allocate/initialize root(s). */
- for (root = NULL, nitems = 0; *argv; ++argv, ++nitems) {
- len = strlen(*argv);
- if ((p = fts_alloc(sp, *argv, len)) == NULL)
- goto mem3;
- p->fts_level = FTS_ROOTLEVEL;
- p->fts_parent = parent;
- p->fts_accpath = p->fts_name;
- p->fts_info = fts_stat(sp, p, ISSET(FTS_COMFOLLOWDIR) ? -1 : ISSET(FTS_COMFOLLOW), -1);
-
- /* 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 (sp->fts_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 (sp->fts_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 | O_CLOEXEC)) < 0)
- SET(FTS_NOCHDIR);
-
- if (!ISSET(FTS_NOCHDIR) && getenv("FTS_USE_THREAD_FCHDIR") != NULL)
- SET(FTS_THREAD_FCHDIR);
-
- if (nitems == 0)
- fts_free(parent);
-
- return (sp);
-
-mem3: fts_lfree(root);
- fts_free(parent);
-mem2: free(sp->fts_path);
-mem1: free(sp);
- return (NULL);
-}
-
-FTS *
-fts_open(char * const *argv, int options, int (*compar)())
-{
- FTS *sp;
-
- /* Options check. */
- if (options & ~FTS_OPTIONMASK) {
- errno = EINVAL;
- return (NULL);
- }
- if (options & FTS_NOSTAT_TYPE) options |= FTS_NOSTAT;
-
- /* Allocate/initialize the stream */
- if ((sp = calloc(1, sizeof(FTS))) == NULL)
- return (NULL);
- sp->fts_compar = compar;
- sp->fts_options = options;
-
- return __fts_open(argv, sp);
-}
-
-#ifdef __BLOCKS__
-FTS *
-fts_open_b(char * const *argv, int options, int (^compar)(const FTSENT **, const FTSENT **))
-{
- FTS *sp;
-
- /* Options check. */
- if (options & ~FTS_OPTIONMASK) {
- errno = EINVAL;
- return (NULL);
- }
- if (options & FTS_NOSTAT_TYPE) options |= FTS_NOSTAT;
-
- /* Allocate/initialize the stream */
- if ((sp = calloc(1, sizeof(FTS))) == NULL)
- return (NULL);
- sp->fts_compar_b = (int (^)())Block_copy(compar);
- sp->fts_options = options | FTS_BLOCK_COMPAR;
-
- return __fts_open(argv, sp);
-}
-#endif /* __BLOCKS__ */
-
-static void
-fts_load(FTS *sp, FTSENT *p)
-{
- ssize_t len;
- 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)
-{
- FTSENT *freep, *p;
- int rfd, error = 0;
-
- /*
- * 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 ? p->fts_link : p->fts_parent;
- fts_free(freep);
- }
- fts_free(p);
- }
-
- /* Stash the original directory fd if needed. */
- rfd = ISSET(FTS_NOCHDIR) ? -1 : sp->fts_rfd;
-
- /* Free up child linked list, sort array, path buffer, stream ptr.*/
- if (sp->fts_child){
- fts_lfree(sp->fts_child);
- }
- free(sp->fts_array); sp->fts_array = NULL;
- free(sp->fts_path); sp->fts_path = NULL;
-
-#ifdef __BLOCKS__
- /* Free up any block pointer. */
- if (ISSET(FTS_BLOCK_COMPAR) && sp->fts_compar_b != NULL)
- Block_release(sp->fts_compar_b);
-#endif /* __BLOCKS__ */
-
- /* Return to original directory, checking for error. */
- if (rfd != -1) {
- int saved_errno = errno;
- if (fts_fchdir(sp, rfd) != 0){
- error = -1;
- saved_errno = errno;
- }
- if (close(rfd) != 0){
- error = -1;
- saved_errno = errno;
- }
- errno = saved_errno;
- }
-
- /* Free up the stream pointer. */
- free(sp);
-
- return (error);
-}
-
-/*
- * 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(FTS *sp)
-{
- FTSENT *p, *tmp;
- int instr;
- 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, -1);
- 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, -1);
- if (p->fts_info == FTS_D && !ISSET(FTS_NOCHDIR)) {
- if ((p->fts_symfd =
- open(".", O_RDONLY | O_CLOEXEC)) < 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);
- p->fts_symfd = -1;
- }
- 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 && 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) {
- 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; 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;
- goto name;
- }
-
- /* Move to the next node on this level. */
-next: tmp = p;
- if ((p = p->fts_link)) {
- fts_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) {
- sp->fts_cur = p;
- if (FCHDIR(sp, sp->fts_rfd)) {
- SET(FTS_STOP);
- return (NULL);
- }
- fts_load(sp, p);
- return (sp->fts_cur);
- }
-
- /*
- * 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, -1);
- if (p->fts_info == FTS_D && !ISSET(FTS_NOCHDIR)) {
- if ((p->fts_symfd =
- open(".", O_RDONLY | O_CLOEXEC, 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 (sp->fts_cur = p);
- }
-
- /* Move up to the parent node. */
- p = tmp->fts_parent;
- fts_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.
- */
- fts_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);
- sp->fts_cur = p;
- return (NULL);
- }
- } else if (p->fts_flags & FTS_SYMFOLLOW) {
- if (FCHDIR(sp, p->fts_symfd)) {
- saved_errno = errno;
- (void)close(p->fts_symfd);
- p->fts_symfd = -1;
- errno = saved_errno;
- SET(FTS_STOP);
- sp->fts_cur = p;
- return (NULL);
- }
- (void)close(p->fts_symfd);
- p->fts_symfd = -1;
- } else if (!(p->fts_flags & FTS_DONTCHDIR) &&
- fts_safe_changedir(sp, p, -1, "..")) {
- SET(FTS_STOP);
- sp->fts_cur = p;
- return (NULL);
- }
- p->fts_info = p->fts_errno ? FTS_ERR : FTS_DP;
- return (sp->fts_cur = 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 __unused *sp, FTSENT *p, int instr)
-{
- if (instr && 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(FTS *sp, int instr)
-{
- FTSENT *p;
- int fd;
-
- if (instr && 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)
- 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)) {
- sp->fts_child = fts_build(sp, instr);
- if (errno)
- p->fts_errno = errno;
- return (sp->fts_child);
- }
-
- if ((fd = open(".", O_RDONLY | O_CLOEXEC, 0)) < 0)
- return (NULL);
- sp->fts_child = fts_build(sp, instr);
- if (errno)
- p->fts_errno = errno;
- if (fts_fchdir(sp, fd)) {
- (void)close(fd);
- return (NULL);
- }
- (void)close(fd);
- return (sp->fts_child);
-}
-
-typedef struct __attribute__((packed)) __attribute__((__aligned__(4))) {
- uint32_t length;
-
- /* common attributes */
- attribute_set_t attrset;
- attrreference_t name;
- dev_t st_dev;
- fsobj_type_t objtype;
- struct timespec st_birthtimespec;
- struct timespec st_mtimespec;
- struct timespec st_ctimespec;
- struct timespec st_atimespec;
- uid_t st_uid;
- gid_t st_gid;
- uint32_t accessmask;
- uint32_t st_flags;
- uint64_t st_ino;
-
- /* non-directory attributes */
- uint32_t st_nlink;
- off_t allocsize;
- uint32_t st_blksize;
- uint32_t st_rdev;
- off_t st_size;
-} attrListAttributes;
-
-typedef struct __attribute__((packed)) {
- uint32_t length;
-
- /* common attributes */
- attribute_set_t attrset;
- attrreference_t name;
- dev_t st_dev;
- fsobj_type_t objtype;
- uint64_t st_ino;
-
- /* non-directory attributes */
- uint32_t st_nlink;
- uint32_t st_rdev;
-} attrListAttributes_nostat;
-
-#define ATTR_BUF_SIZE (32*1024)
-
-typedef struct {
- DIR *dirp;
-
- struct attrlist requested_attrs;
- void *attrbuf;
- union {
- attrListAttributes *curattr;
- attrListAttributes_nostat *curattr_nostat;
- };
- int dirfd;
- bool done;
- bool nostat;
- bool needs_dot;
- bool needs_dotdot;
-
- int entry_count;
- int cur_entry;
-} dir_handle;
-
-typedef struct {
- char *d_name;
- size_t d_namlen;
- struct stat sb;
- int d_type;
- bool stat_valid;
-} dir_entry;
-
-static bool
-advance_directory(dir_handle *handle)
-{
- if (handle->done) return true;
-
- os_assert(handle->dirfd != -1);
- handle->entry_count = getattrlistbulk(handle->dirfd, &handle->requested_attrs,
- handle->attrbuf, ATTR_BUF_SIZE, FSOPT_PACK_INVAL_ATTRS);
- if (handle->entry_count == -1) {
- goto error;
- } else if (handle->entry_count == 0) {
- /* No more entries. */
- handle->done = true;
- }
- handle->cur_entry = 0;
- handle->curattr = handle->attrbuf;
- return true;
-
-error: {
- int saved_errno = errno;
- close(handle->dirfd);
- handle->dirfd = -1;
- errno = saved_errno;
- return false;
- }
-}
-
-static bool
-open_directory(FTS *sp, dir_handle *handle, const char *path)
-{
- memset(handle, 0, sizeof(*handle));
-
- handle->nostat = ISSET(FTS_NOSTAT);
- handle->needs_dot = handle->needs_dotdot = ISSET(FTS_SEEDOT);
-
- handle->dirfd = open(path, O_RDONLY | O_NONBLOCK | O_DIRECTORY | O_CLOEXEC);
- if (handle->dirfd == -1) goto fallback;
-
- handle->attrbuf = malloc(ATTR_BUF_SIZE);
- if (!handle->attrbuf) goto fallback;
-
- handle->requested_attrs.bitmapcount = ATTR_BIT_MAP_COUNT;
- if (!handle->nostat) {
- handle->requested_attrs.commonattr =
- ATTR_CMN_RETURNED_ATTRS|
- ATTR_CMN_NAME|ATTR_CMN_DEVID|ATTR_CMN_OBJTYPE|
- ATTR_CMN_CRTIME|ATTR_CMN_MODTIME|ATTR_CMN_CHGTIME|ATTR_CMN_ACCTIME|
- ATTR_CMN_OWNERID|ATTR_CMN_GRPID|ATTR_CMN_ACCESSMASK|ATTR_CMN_FLAGS|
- ATTR_CMN_FILEID;
- handle->requested_attrs.fileattr = ATTR_FILE_LINKCOUNT|ATTR_FILE_ALLOCSIZE|
- ATTR_FILE_IOBLOCKSIZE|ATTR_FILE_DEVTYPE|ATTR_FILE_DATALENGTH;
- } else {
- handle->requested_attrs.commonattr = ATTR_CMN_RETURNED_ATTRS|
- ATTR_CMN_NAME|ATTR_CMN_DEVID|ATTR_CMN_OBJTYPE|
- ATTR_CMN_FILEID;
- handle->requested_attrs.fileattr = ATTR_FILE_LINKCOUNT;
- }
-
- if (advance_directory(handle)) {
- /*
- * We successfully read the first attribute buffer,
- * so we'll use getdirentriesattr/getattrlistbulk.
- */
- return true;
- }
-
-fallback:
- if (handle->dirfd != -1) close(handle->dirfd);
- handle->dirfd = -1;
- free(handle->attrbuf);
- handle->attrbuf = NULL;
- handle->dirp = opendir(path);
- return (handle->dirp != NULL);
-}
-
-static bool
-read_dirent(dir_handle *handle, dir_entry *entry)
-{
- if (handle->dirp) {
- struct dirent *de = readdir(handle->dirp);
- if (de == NULL) return false;
- entry->d_name = de->d_name;
- entry->d_namlen = de->d_namlen;
- entry->d_type = de->d_type;
- entry->stat_valid = false;
- return true;
- }
-
- /*
- * There are three states that our dir_handle can be in:
- * - real getattrlistbulk use (entry_count >= 0) - the rest of this function
- * - fallback - handled above with dirp
- * - closed fallback (dirp == NULL) - handled with this check
- */
- if (handle->dirfd == -1) {
- return false;
- }
-
- if (handle->needs_dot) {
- handle->needs_dot = false;
- entry->d_name = ".";
- entry->d_namlen = strlen(".");
- entry->d_type = DT_DIR;
- entry->stat_valid = false;
- return true;
- } else if (handle->needs_dotdot) {
- handle->needs_dotdot = false;
- entry->d_name = "..";
- entry->d_namlen = strlen("..");
- entry->d_type = DT_DIR;
- entry->stat_valid = false;
- return true;
- }
-
- if (handle->cur_entry == handle->entry_count) {
- if (handle->done) return false; /* Already done with the directory. */
- if (!advance_directory(handle)) return false; /* Reading the next buffer failed. */
- if (handle->done) return false; /* We're now done with the directory. */
- }
-
- bzero(entry, sizeof(*entry));
-
- attrListAttributes *curattr_stat = NULL;
- attrListAttributes_nostat *curattr_nostat = NULL;
- if (!handle->nostat) {
- curattr_stat = handle->curattr;
- handle->cur_entry++;
- handle->curattr = (attrListAttributes*)(((char*)curattr_stat) + curattr_stat->length);
- os_assert((handle->cur_entry == handle->entry_count) ||
- (void*)handle->curattr + handle->curattr->length <= (void*)handle->attrbuf + ATTR_BUF_SIZE);
-
- os_assert(curattr_stat->name.attr_length > 0);
- entry->d_name = ((char*)&curattr_stat->name) + curattr_stat->name.attr_dataoffset;
- /* attr_length includes the null terminator, but readdir's d_namlen doesn't. */
- entry->d_namlen = curattr_stat->name.attr_length - 1;
- os_assert((void*)entry->d_name + curattr_stat->name.attr_length <= (void*)handle->attrbuf + ATTR_BUF_SIZE);
- } else {
- curattr_nostat = handle->curattr_nostat;
- handle->cur_entry++;
- handle->curattr_nostat = (attrListAttributes_nostat*)(((char*)curattr_nostat) + curattr_nostat->length);
- os_assert((handle->cur_entry == handle->entry_count) ||
- (void*)handle->curattr + handle->curattr->length <= (void*)handle->attrbuf + ATTR_BUF_SIZE);
-
- os_assert(curattr_nostat->name.attr_length > 0);
- entry->d_name = ((char*)&curattr_nostat->name) + curattr_nostat->name.attr_dataoffset;
- /* attr_length includes the null terminator, but readdir's d_namlen doesn't. */
- entry->d_namlen = curattr_nostat->name.attr_length - 1;
- os_assert((void*)entry->d_name + curattr_nostat->name.attr_length <= (void*)handle->attrbuf + ATTR_BUF_SIZE);
- }
-
- int stat_type = 0;
-
- switch (handle->nostat ? curattr_nostat->objtype : curattr_stat->objtype) {
- case VREG:
- entry->d_type = DT_REG;
- stat_type = S_IFREG;
- break;
- case VDIR:
- entry->d_type = DT_DIR;
- /* Force a stat call so we don't have to guess on st_size, st_blocks, etc. */
- // stat_type = S_IFDIR;
- break;
- case VBLK:
- entry->d_type = DT_BLK;
- stat_type = S_IFBLK;
- break;
- case VCHR:
- entry->d_type = DT_CHR;
- stat_type = S_IFCHR;
- break;
- case VLNK:
- entry->d_type = DT_LNK;
- stat_type = S_IFLNK;
- break;
- case VSOCK:
- entry->d_type = DT_SOCK;
- stat_type = S_IFSOCK;
- break;
- case VFIFO:
- entry->d_type = DT_FIFO;
- stat_type = S_IFIFO;
- break;
- default:
- entry->d_type = DT_UNKNOWN;
- break;
- }
-
- if (!handle->nostat && stat_type) {
- entry->stat_valid = true;
-
- /*
- * Make sure we got all the attributes we need to fill out a stat structure.
- */
-
- attrgroup_t requiredCommon = handle->requested_attrs.commonattr;
- attrgroup_t requiredFile = handle->requested_attrs.fileattr;
-
- if ((entry->d_type != DT_BLK) && (entry->d_type != DT_CHR)) {
- /* It's okay for ATTR_FILE_DEVTYPE to be missing if the entry isn't a block or character device. */
- curattr_stat->st_rdev = 0;
- requiredFile &= ~ATTR_FILE_DEVTYPE;
- }
-
- if ((curattr_stat->attrset.commonattr & ATTR_CMN_CRTIME) == 0) {
- /* Many (most?) file systems don't support create time (see vn_stat_noauth in xnu) */
- curattr_stat->st_birthtimespec.tv_sec = curattr_stat->st_birthtimespec.tv_nsec = 0;
- requiredCommon &= ~ ATTR_CMN_CRTIME;
- }
-
- if ((curattr_stat->attrset.commonattr & requiredCommon) != requiredCommon ||
- (curattr_stat->attrset.fileattr & requiredFile) != requiredFile) {
- /* Some of our required attributes are missing. */
- entry->stat_valid = false;
- }
- } else {
- entry->stat_valid = false;
- }
-
- if (entry->stat_valid) {
-
-#define COPY_FIELD(fld) entry->sb.fld = curattr_stat->fld
- COPY_FIELD(st_dev);
- /* COPY_FIELD(st_mode); Handled below. */
- COPY_FIELD(st_nlink);
- COPY_FIELD(st_ino);
- COPY_FIELD(st_uid);
- COPY_FIELD(st_gid);
- COPY_FIELD(st_rdev);
- COPY_FIELD(st_atimespec);
- COPY_FIELD(st_mtimespec);
- COPY_FIELD(st_ctimespec);
-#if __DARWIN_64_BIT_INO_T
- COPY_FIELD(st_birthtimespec);
-#endif /* __DARWIN_64_BIT_INO_T */
- COPY_FIELD(st_size);
- /* COPY_FIELD(st_blocks); Handled below. */
- COPY_FIELD(st_blksize);
- COPY_FIELD(st_flags);
-#undef COPY_FIELD
-
- /* We have to handle some fields specially. */
- entry->sb.st_mode = (curattr_stat->accessmask & ~S_IFMT) | stat_type;
- entry->sb.st_blocks = howmany(curattr_stat->allocsize, 512); /* Matches vn_stat implementation in xnu. */
- }
- return true;
-}
-
-static int
-dir_fd(dir_handle *handle)
-{
- return handle->dirp ? dirfd(handle->dirp) : handle->dirfd;
-}
-
-static void
-close_directory(dir_handle *handle)
-{
- if (handle->dirp) {
- closedir(handle->dirp);
- handle->dirp = NULL;
- }
- if (handle->dirfd != -1) {
- close(handle->dirfd);
- handle->dirfd = -1;
- }
- free(handle->attrbuf);
- handle->attrbuf = NULL;
-}
-
-/*
- * 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, we can use d_type to determine if the entry is a directory (or for
- * logical walks, a directory or symlink) and not call stat for other file
- * types. This cuts the number of stat calls significantly.
- */
-static FTSENT *
-fts_build(FTS *sp, int type)
-{
- dir_entry de = { 0 };
- dir_entry *dp = &de;
- FTSENT *p, *head;
- int nitems;
- FTSENT *cur, *tail;
- dir_handle dirp;
- void *oldaddr;
- int len, maxlen;
- int cderrno, descend, level, dostat, doadjust;
- int saved_errno;
- 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 (!open_directory(sp, &dirp, cur->fts_accpath)) {
- if (type == BREAD) {
- cur->fts_info = FTS_DNR;
- cur->fts_errno = errno;
- }
- return (NULL);
- }
-
- if (type == BNAMES)
- dostat = F_NOSTAT;
- else if (ISSET(FTS_NOSTAT_TYPE))
- dostat = ISSET(FTS_PHYSICAL) ? F_D_TYPE : F_D_TYPESYM;
- else if (ISSET(FTS_NOSTAT))
- dostat = ISSET(FTS_PHYSICAL) ? F_STATDIR : F_STATDIRSYM;
- else
- dostat = F_ALWAYSSTAT;
-
-#ifdef notdef
- (void)printf("dostat == %d\n", dostat);
- (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 (dostat || type == BREAD) {
- if (fts_safe_changedir(sp, cur, dir_fd(&dirp), NULL)) {
- if (dostat && type == BREAD) {
- cur->fts_errno = errno;
- }
- cur->fts_flags |= FTS_DONTCHDIR;
- descend = 0;
- cderrno = errno;
- close_directory(&dirp);
- } 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++ = '/';
- }
- len++;
- maxlen = sp->fts_pathlen - len;
-
- /*
- * fts_level is signed so we must prevent it from wrapping
- * around to FTS_ROOTLEVEL and FTS_ROOTPARENTLEVEL.
- */
- level = cur->fts_level;
- if (level < FTS_MAXLEVEL)
- level++;
-
- /* Read the directory, attaching each entry to the `link' pointer. */
- doadjust = 0;
- for (head = tail = NULL, nitems = 0; read_dirent(&dirp, dp) ; ) {
- if (!ISSET(FTS_SEEDOT) && ISDOT(dp->d_name))
- continue;
-
- if ((p = fts_alloc(sp, dp->d_name, (int)dp->d_namlen)) == NULL)
- goto mem1;
- if (dp->d_namlen >= (size_t)maxlen) { /* include space for NUL */
- oldaddr = sp->fts_path;
- if (fts_palloc(sp, dp->d_namlen +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;
- fts_free(p);
- fts_lfree(head);
- close_directory(&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 + dp->d_namlen >= 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.
- */
- fts_free(p);
- fts_lfree(head);
- close_directory(&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 + dp->d_namlen;
-
- if (cderrno) {
- if (dostat) {
- p->fts_info = FTS_NS;
- p->fts_errno = cderrno;
- } else
- p->fts_info = FTS_NSOK;
- p->fts_accpath = cur->fts_accpath;
- } else {
- /*
- * We need to know all file types values that d_type may
- * be set to. So if that changes, the following needs
- * to be modified appropriately.
- */
- switch(dostat | dp->d_type) {
- case (F_STATDIR | DT_UNKNOWN):
- case (F_STATDIR | DT_DIR):
- case (F_STATDIRSYM | DT_UNKNOWN):
- case (F_STATDIRSYM | DT_DIR):
- case (F_STATDIRSYM | DT_LNK):
- case (F_ALWAYSSTAT | DT_UNKNOWN):
- case (F_ALWAYSSTAT | DT_FIFO):
- case (F_ALWAYSSTAT | DT_CHR):
- case (F_ALWAYSSTAT | DT_DIR):
- case (F_ALWAYSSTAT | DT_BLK):
- case (F_ALWAYSSTAT | DT_REG):
- case (F_ALWAYSSTAT | DT_LNK):
- case (F_ALWAYSSTAT | DT_SOCK):
- case (F_ALWAYSSTAT | DT_WHT):
- case (F_D_TYPE | DT_UNKNOWN):
- case (F_D_TYPE | DT_DIR):
- case (F_D_TYPESYM | DT_UNKNOWN):
- case (F_D_TYPESYM | DT_DIR):
- case (F_D_TYPESYM | DT_LNK):
- /* 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);
- p->fts_info = fts_stat2(sp, p, 0, dir_fd(&dirp), dp->stat_valid ? &dp->sb : NULL);
- } else {
- p->fts_accpath = p->fts_name;
- p->fts_info = fts_stat2(sp, p, 0, -1, dp->stat_valid ? &dp->sb : NULL);
- }
- break;
- case (F_D_TYPE | DT_FIFO):
- case (F_D_TYPE | DT_CHR):
- case (F_D_TYPE | DT_BLK):
- case (F_D_TYPE | DT_SOCK):
- case (F_D_TYPESYM | DT_FIFO):
- case (F_D_TYPESYM | DT_CHR):
- case (F_D_TYPESYM | DT_BLK):
- case (F_D_TYPESYM | DT_SOCK):
- p->fts_info = FTS_DEFAULT;
- goto common_no_stat;
- case (F_D_TYPE | DT_REG):
- case (F_D_TYPESYM | DT_REG):
- p->fts_info = FTS_F;
- goto common_no_stat;
- case (F_D_TYPE | DT_LNK):
- p->fts_info = FTS_SL;
- goto common_no_stat;
- case (F_D_TYPE | DT_WHT):
- case (F_D_TYPESYM | DT_WHT):
- p->fts_info = FTS_W;
- goto common_no_stat;
- default:
- /* No stat necessary */
- p->fts_info = FTS_NSOK;
-common_no_stat:
- p->fts_accpath =
- ISSET(FTS_NOCHDIR) ? p->fts_path : p->fts_name;
- break;
- }
- }
-
- /* 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;
- }
- close_directory(&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))
- sp->fts_path[cur->fts_pathlen] = '\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, -1, ".."))) {
- cur->fts_info = FTS_ERR;
- SET(FTS_STOP);
- return (NULL);
- }
-
- /* If didn't find anything, return NULL. */
- if (!nitems) {
- if (type == BREAD)
- cur->fts_info = FTS_DP;
- 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, FTSENT *p, int follow, int dfd)
-{
- return fts_stat2(sp, p, follow, dfd, NULL);
-}
-
-static u_short
-fts_stat2(FTS *sp, FTSENT *p, int follow, int dfd, struct stat *insb)
-{
- FTSENT *t;
- dev_t dev;
- ino_t ino;
- struct stat *sbp, sb;
- int saved_errno;
- const char *path;
-
- if (dfd == -1) {
- path = p->fts_accpath;
- dfd = AT_FDCWD;
- } else {
- path = p->fts_name;
- }
-
- /* If user needs stat info, stat buffer already allocated. */
- sbp = ISSET(FTS_NOSTAT) ? &sb : p->fts_statp;
-
- /*
- * getattrlistbulk always returns information about the link, not its
- * destination, so if we are doing a logical walk we need to detect links
- * and do a stat anyway.
- */
- if (follow) {
- insb = NULL;
- } else if (insb && ISSET(FTS_LOGICAL) && ((insb->st_mode & S_IFLNK) == S_IFLNK)) {
- insb = NULL;
- }
-
- if (insb) {
- memcpy(sbp, insb, sizeof(*insb));
- } else if (ISSET(FTS_LOGICAL) || follow) {
- /*
- * 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 (fstatat(dfd, path, sbp, 0)) {
- saved_errno = errno;
- if (!fstatat(dfd, path, sbp, AT_SYMLINK_NOFOLLOW)) {
- if (saved_errno == ELOOP)
- p->fts_errno = ELOOP;
- errno = 0;
- return (FTS_SLNONE);
- }
- p->fts_errno = saved_errno;
- goto err;
- }
- /*
- * For FTS_COMFOLLOWDIR, drop back to lstat unless we have
- * a directory
- */
- if (follow == -1 && !S_ISDIR(sbp->st_mode)) {
- if (fstatat(dfd, path, sbp, AT_SYMLINK_NOFOLLOW)) {
- p->fts_errno = errno;
- goto err;
- }
- }
- } else if (fstatat(dfd, path, sbp, AT_SYMLINK_NOFOLLOW)) {
- 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, int nitems)
-{
- 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 = reallocarray(sp->fts_array,
- 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;
-#ifdef __BLOCKS__
- if (ISSET(FTS_BLOCK_COMPAR))
- qsort_b((void *)sp->fts_array, nitems, sizeof(FTSENT *), (int (^)(const void *, const void *))sp->fts_compar_b);
- else
-#endif /* __BLOCKS__ */
- 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, char *name, ssize_t namelen)
-{
- 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 = calloc(1, len)) == NULL)
- return (NULL);
-
- p->fts_symfd = -1;
- p->fts_path = sp->fts_path;
- p->fts_namelen = namelen;
- p->fts_instr = FTS_NOINSTR;
- if (!ISSET(FTS_NOSTAT))
- p->fts_statp = (struct stat *)ALIGN(p->fts_name + namelen + 2);
- memcpy(p->fts_name, name, namelen);
-
- return (p);
-}
-
-static void
-fts_free(FTSENT *p)
-{
-
- if (p->fts_symfd >= 0) {
- int saved_errno = errno;
- (void)close(p->fts_symfd);
- errno = saved_errno;
- }
- free(p);
-}
-
-static void
-fts_lfree(FTSENT *head)
-{
- FTSENT *p;
-
- /* Free a linked list of structures. */
- while ((p = head)) {
- head = head->fts_link;
- fts_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 PATH_MAX, 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) { \
- if ((p)->fts_accpath != (p)->fts_name) { \
- (p)->fts_accpath = \
- (char *)addr + ((p)->fts_accpath - (p)->fts_path); \
- } \
- (p)->fts_path = addr; \
-}
- /* 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);
-}
-
-static int
-fts_fchdir(FTS *sp, int fd)
-{
- if (ISSET(FTS_THREAD_FCHDIR))
- return (pthread_fchdir_np(fd));
- return (fchdir(fd));
-}
-
-/*
- * 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, char *path)
-{
- int ret, oerrno, newfd;
- struct stat sb;
-
- newfd = fd;
- if (ISSET(FTS_NOCHDIR))
- return (0);
- if (fd < 0 && (newfd = open(path, O_RDONLY|O_DIRECTORY|O_CLOEXEC)) < 0)
- return (-1);
- if (fstat(newfd, &sb)) {
- ret = -1;
- goto bail;
- }
- /*
- * On Darwin this check causes us to not correctly descend into automounts,
- * since the mount point and trigger will have a different devices and
- * inodes. It would be preferable to find a way to use
- * ATTR_DIR_MOUNTSTATUS and DIR_MNTSTATUS_TRIGGER to detect these cases,
- * but plumbing that through will be challenging. Instead, will just
- * disable it for now.
- */
-#if 0
- if (p->fts_dev != sb.st_dev || p->fts_ino != sb.st_ino) {
- errno = ENOENT; /* disinformation */
- ret = -1;
- goto bail;
- }
-#endif
-
- if (fd != -1) {
- // Going down
- struct stat csb;
- int cfd = open(".", O_RDONLY | O_CLOEXEC);
- if (cfd < 0) {
- ret = -1;
- goto bail;
- } else if (fstat(cfd, &csb)) {
- oerrno = errno;
- (void)close(cfd);
- errno = oerrno;
- ret = -1;
- goto bail;
- } else {
- if (sb.st_dev != csb.st_dev) {
- // Changed device, so we'll need to track the fd of the current
- // directory
- p->fts_symfd = cfd;
- p->fts_flags |= FTS_CHDIRFD;
- } else {
- // Same device so assume open("..") will work
- (void)close(cfd);
- }
- }
- } else if (fd == -1 && strcmp(path, "..") == 0) {
- // Going up
- if (p->fts_flags & FTS_CHDIRFD) {
- // If FTS_CHDIRFD is set, use the stashed fd to follow ".."
- (void)close(newfd);
- newfd = p->fts_symfd;
- p->fts_symfd = -1;
- p->fts_flags &= ~FTS_CHDIRFD;
- }
- }
-
- ret = fts_fchdir(sp, newfd);
-bail:
- oerrno = errno;
- if (fd < 0)
- (void)close(newfd);
- errno = oerrno;
- return (ret);
-}
-#pragma clang diagnostic pop