/*
- * Copyright (c) 1999, 2000, 2003, 2005, 2008, 2012 Apple Inc. All rights reserved.
+ * Copyright (c) 1999, 2000, 2003, 2005, 2008, 2012, 2016 Apple Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
* 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. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
+ * 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.
*
* 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 <assert.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>
+
#ifdef __BLOCKS__
#include <Block.h>
#endif /* __BLOCKS__ */
+#include <malloc_private.h>
static FTSENT *fts_alloc(FTS *, char *, int);
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 *, void *);
+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 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 *);
-#define ISDOT(a) (a[0] == '.' && (!a[1] || a[1] == '.' && !a[2]))
+#define ISDOT(a) (a[0] == '.' && (!a[1] || (a[1] == '.' && !a[2])))
-#define ISSET(opt) (sp->fts_options & opt)
-#define SET(opt) (sp->fts_options |= opt)
+#define CLR(opt) (sp->fts_options &= ~(opt))
+#define ISSET(opt) (sp->fts_options & (opt))
+#define SET(opt) (sp->fts_options |= (opt))
-#define CHDIR(sp, path) (!ISSET(FTS_NOCHDIR) && chdir(path))
#define FCHDIR(sp, fd) (!ISSET(FTS_NOCHDIR) && fchdir(fd))
/* fts_build flags */
#define F_D_TYPESYM (5 << F_SHIFT) /* only stat directories and symlinks but use d_type */
static FTS *
-__fts_open(argv, sp)
- char * const *argv;
- register FTS *sp;
+__fts_open(char * const *argv, FTS *sp)
{
- register FTSENT *p, *root;
- register int nitems;
- FTSENT *parent, *tmp = NULL;
+ FTSENT *p, *root;
+ int nitems;
+ FTSENT *parent, *tmp;
int len;
/* Logical walks turn on NOCHDIR; symbolic links are too hard. */
* 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), MAXPATHLEN)))
+ if (fts_palloc(sp, MAX(fts_maxarglen(argv), PATH_MAX)))
goto mem1;
/* Allocate/initialize root's parent. */
goto mem3;
}
- p = fts_alloc(sp, *argv, len);
+ 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));
+ 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)
sp->fts_cur->fts_info = FTS_INIT;
/*
- * If using chdir(2), grab a file descriptor pointing to dot to insure
+ * 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)
+ if (!ISSET(FTS_NOCHDIR) &&
+ (sp->fts_rfd = open(".", O_RDONLY | O_CLOEXEC)) < 0)
SET(FTS_NOCHDIR);
+ if (nitems == 0)
+ free(parent);
+
return (sp);
mem3: fts_lfree(root);
}
FTS *
-fts_open(argv, options, compar)
- char * const *argv;
- int options;
- int (*compar)();
+fts_open(char * const *argv, int options, int (*compar)())
{
- register FTS *sp;
+ FTS *sp;
/* Options check. */
if (options & ~FTS_OPTIONMASK) {
if (options & FTS_NOSTAT_TYPE) options |= FTS_NOSTAT;
/* Allocate/initialize the stream */
- if ((sp = malloc((u_int)sizeof(FTS))) == NULL)
+ if ((sp = calloc(1, sizeof(FTS))) == NULL)
return (NULL);
- memset(sp, 0, sizeof(FTS));
sp->fts_compar = compar;
sp->fts_options = options;
#ifdef __BLOCKS__
FTS *
-fts_open_b(argv, options, compar)
- char * const *argv;
- int options;
- int (^compar)(const FTSENT **, const FTSENT **);
+fts_open_b(char * const *argv, int options, int (^compar)(const FTSENT **, const FTSENT **))
{
- register FTS *sp;
+ FTS *sp;
/* Options check. */
if (options & ~FTS_OPTIONMASK) {
if (options & FTS_NOSTAT_TYPE) options |= FTS_NOSTAT;
/* Allocate/initialize the stream */
- if ((sp = malloc((u_int)sizeof(FTS))) == NULL)
+ if ((sp = calloc(1, sizeof(FTS))) == NULL)
return (NULL);
- memset(sp, 0, sizeof(FTS));
sp->fts_compar_b = (int (^)())Block_copy(compar);
sp->fts_options = options | FTS_BLOCK_COMPAR;
#endif /* __BLOCKS__ */
static void
-fts_load(sp, p)
- FTS *sp;
- register FTSENT *p;
+fts_load(FTS *sp, FTSENT *p)
{
- register int len;
- register char *cp;
+ int len;
+ char *cp;
/*
* Load the stream structure for the next traversal. Since we don't
}
int
-fts_close(sp)
- FTS *sp;
+fts_close(FTS *sp)
{
- register FTSENT *freep, *p;
- int saved_errno = 0;
+ FTSENT *freep, *p;
+ int rfd, error = 0;
/*
* This still works if we haven't read anything -- the dummy structure
free(p);
}
- /* Free up child linked list, sort array, path buffer. */
- if (sp->fts_child)
+ /* 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);
- if (sp->fts_array)
- free(sp->fts_array);
- free(sp->fts_path);
-
- /* Return to original directory, save errno if necessary. */
- if (!ISSET(FTS_NOCHDIR)) {
- if (fchdir(sp->fts_rfd)) {
- saved_errno = errno;
- }
- (void)close(sp->fts_rfd);
}
+ free(sp->fts_array); sp->fts_array = NULL;
+ free(sp->fts_path); sp->fts_path = NULL;
#ifdef __BLOCKS__
/* Free up any block pointer. */
/* Free up the stream pointer. */
free(sp);
- /* Set errno and return. */
- if (saved_errno) {
+ /* Return to original directory, checking for error. */
+ if (rfd != -1) {
+ int saved_errno = errno;
+ if (fchdir(rfd) != 0){
+ error = -1;
+ saved_errno = errno;
+ }
+ if (close(rfd) != 0){
+ error = -1;
+ saved_errno = errno;
+ }
errno = saved_errno;
- return (-1);
}
- return (0);
+
+ return (error);
}
/*
p->fts_path[0] == '/' ? 0 : p->fts_pathlen)
FTSENT *
-fts_read(sp)
- register FTS *sp;
+fts_read(FTS *sp)
{
- register FTSENT *p, *tmp;
- register int instr;
- register char *t;
+ FTSENT *p, *tmp;
+ int instr;
+ char *t;
int saved_errno;
/* If finished or unrecoverable error, return NULL. */
/* 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);
+ p->fts_info = fts_stat(sp, p, 0, -1);
return (p);
}
*/
if (instr == FTS_FOLLOW &&
(p->fts_info == FTS_SL || p->fts_info == FTS_SLNONE)) {
- p->fts_info = fts_stat(sp, p, 1);
+ 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, 0)) < 0) {
+ if ((p->fts_symfd =
+ open(".", O_RDONLY | O_CLOEXEC)) < 0) {
p->fts_errno = errno;
p->fts_info = FTS_ERR;
} else {
}
/* Rebuild if only read the names and now traversing. */
- if (sp->fts_child && sp->fts_options & FTS_NAMEONLY) {
- sp->fts_options &= ~FTS_NAMEONLY;
+ if (sp->fts_child && ISSET(FTS_NAMEONLY)) {
+ CLR(FTS_NAMEONLY);
fts_lfree(sp->fts_child);
sp->fts_child = NULL;
}
* FTS_STOP or the fts_info field of the node.
*/
if (sp->fts_child) {
- if (CHDIR(sp, p->fts_accpath)) {
+ 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)
/* Move to the next node on this level. */
next: tmp = p;
if ((p = p->fts_link)) {
+ free(tmp);
+
/*
- * If reached the top, return to the original directory, and
- * load the paths for the next root.
+ * 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 (!ISSET(FTS_NOCHDIR) && FCHDIR(sp, sp->fts_rfd)) {
+ if (FCHDIR(sp, sp->fts_rfd)) {
SET(FTS_STOP);
return (NULL);
}
fts_load(sp, p);
- free(tmp);
return (sp->fts_cur = p);
}
* get back if necessary.
*/
if (p->fts_instr == FTS_SKIP) {
- free(tmp);
goto next;
}
if (p->fts_instr == FTS_FOLLOW) {
- p->fts_info = fts_stat(sp, p, 1);
+ 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, 0)) < 0) {
+ open(".", O_RDONLY | O_CLOEXEC, 0)) < 0) {
p->fts_errno = errno;
p->fts_info = FTS_ERR;
} else {
p->fts_instr = FTS_NOINSTR;
}
- free(tmp);
name: t = sp->fts_path + NAPPEND(p->fts_parent);
*t++ = '/';
memmove(t, p->fts_name, p->fts_namelen + 1);
/* Move up to the parent node. */
p = tmp->fts_parent;
+ 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(tmp);
free(p);
errno = 0;
return (sp->fts_cur = NULL);
}
- /* Nul terminate the pathname. */
+ /* NUL terminate the pathname. */
sp->fts_path[p->fts_pathlen] = '\0';
/*
* one directory.
*/
if (p->fts_level == FTS_ROOTLEVEL) {
- if (!ISSET(FTS_NOCHDIR) && FCHDIR(sp, sp->fts_rfd)) {
+ if (FCHDIR(sp, sp->fts_rfd)) {
SET(FTS_STOP);
+ sp->fts_cur = p;
return (NULL);
}
} else if (p->fts_flags & FTS_SYMFOLLOW) {
(void)close(p->fts_symfd);
errno = saved_errno;
SET(FTS_STOP);
+ sp->fts_cur = p;
return (NULL);
}
(void)close(p->fts_symfd);
- } else if (!(p->fts_flags & FTS_DONTCHDIR)) {
- if (CHDIR(sp, "..")) {
- SET(FTS_STOP);
- return (NULL);
- }
+ } else if (!(p->fts_flags & FTS_DONTCHDIR) &&
+ fts_safe_changedir(sp, p->fts_parent, -1, "..")) {
+ SET(FTS_STOP);
+ sp->fts_cur = p;
+ return (NULL);
}
- free(tmp);
p->fts_info = p->fts_errno ? FTS_ERR : FTS_DP;
return (sp->fts_cur = p);
}
*/
/* ARGSUSED */
int
-fts_set(sp, p, instr)
- FTS *sp;
- FTSENT *p;
- int instr;
+fts_set(FTS __unused *sp, FTSENT *p, int instr)
{
if (instr && instr != FTS_AGAIN && instr != FTS_FOLLOW &&
instr != FTS_NOINSTR && instr != FTS_SKIP) {
}
FTSENT *
-fts_children(sp, instr)
- register FTS *sp;
- int instr;
+fts_children(FTS *sp, int instr)
{
- register FTSENT *p;
+ FTSENT *p;
int fd;
if (instr && instr != FTS_NAMEONLY) {
fts_lfree(sp->fts_child);
if (instr == FTS_NAMEONLY) {
- sp->fts_options |= FTS_NAMEONLY;
+ SET(FTS_NAMEONLY);
instr = BNAMES;
- } else
+ } else
instr = BCHILD;
/*
ISSET(FTS_NOCHDIR))
return (sp->fts_child = fts_build(sp, instr));
- if ((fd = open(".", O_RDONLY, 0)) < 0)
+ if ((fd = open(".", O_RDONLY | O_CLOEXEC, 0)) < 0)
return (NULL);
sp->fts_child = fts_build(sp, instr);
- if (fchdir(fd))
+ if (fchdir(fd)) {
+ (void)close(fd);
return (NULL);
+ }
(void)close(fd);
return (sp->fts_child);
}
+typedef struct __attribute__((packed)) {
+ 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;
+
+ 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);
+
+ 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;
+ } else {
+ curattr_nostat = handle->curattr_nostat;
+ handle->cur_entry++;
+ handle->curattr_nostat = (attrListAttributes_nostat*)(((char*)curattr_nostat) + curattr_nostat->length);
+
+ 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;
+ }
+
+ 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 & 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
* types. This cuts the number of stat calls significantly.
*/
static FTSENT *
-fts_build(sp, type)
- register FTS *sp;
- int type;
+fts_build(FTS *sp, int type)
{
- register struct dirent *dp;
- register FTSENT *p, *head;
- register int nitems;
+ dir_entry de = { 0 };
+ dir_entry *dp = &de;
+ FTSENT *p, *head;
+ int nitems;
FTSENT *cur, *tail;
- DIR *dirp;
- void *adjaddr;
- int cderrno, descend, len, level, maxlen, dostat, oflag, saved_errno;
- char *cp = NULL;
+ 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.
*/
-#ifdef FTS_WHITEOUT
- 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 (!open_directory(sp, &dirp, cur->fts_accpath)) {
if (type == BREAD) {
cur->fts_info = FTS_DNR;
cur->fts_errno = errno;
* checking FTS_NS on the returned nodes.
*/
cderrno = 0;
- if (dostat || type == BREAD)
- if (FCHDIR(sp, dirfd(dirp))) {
- if (dostat && type == BREAD)
+ 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;
- } else
+ close_directory(&dirp);
+ } else {
descend = 1;
- else
+ }
+ } else {
descend = 0;
+ }
/*
* Figure out the max file name length that can be stored in the
len++;
maxlen = sp->fts_pathlen - len;
- level = cur->fts_level + 1;
+ /*
+ * 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. */
- adjaddr = NULL;
- for (head = tail = NULL, nitems = 0; (dp = readdir(dirp)) ; ) {
+ 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 >= maxlen) { /* include space for NUL */
- if (fts_palloc(sp, (size_t)dp->d_namlen)) {
+ 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;
- if (p)
- free(p);
+ free(p);
fts_lfree(head);
- (void)closedir(dirp);
+ close_directory(&dirp);
cur->fts_info = FTS_ERR;
SET(FTS_STOP);
errno = saved_errno;
return (NULL);
}
- adjaddr = sp->fts_path;
- maxlen = sp->fts_pathlen - sp->fts_cur->fts_pathlen - 1;
+ /* 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.
+ */
+ 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;
-#ifdef FTS_WHITEOUT
- if (dp->d_type == DT_WHT)
- p->fts_flags |= FTS_ISW;
-#endif
-
if (cderrno) {
if (dostat) {
p->fts_info = FTS_NS;
if (ISSET(FTS_NOCHDIR)) {
p->fts_accpath = p->fts_path;
memmove(cp, p->fts_name, p->fts_namelen + 1);
- } else
+ p->fts_info = fts_stat2(sp, p, 0, dir_fd(&dirp), dp->stat_valid ? &dp->sb : NULL);
+ } else {
p->fts_accpath = p->fts_name;
- /* Stat it. */
- p->fts_info = fts_stat(sp, p, 0);
+ 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):
}
++nitems;
}
- (void)closedir(dirp);
+ close_directory(&dirp);
/*
- * If had to realloc the path, adjust the addresses for the rest
- * of the tree.
+ * If realloc() changed the address of the path, adjust the
+ * addresses for the rest of the tree and the dir list.
*/
- if (adjaddr)
- fts_padjust(sp, adjaddr);
+ if (doadjust)
+ fts_padjust(sp, head);
/*
* If not changing directories, reset the path back to original
* state.
*/
if (ISSET(FTS_NOCHDIR)) {
- if (cp - 1 > sp->fts_path)
+ if (len == sp->fts_pathlen || nitems == 0)
--cp;
*cp = '\0';
}
* can't get back, we're done.
*/
if (descend && (type == BCHILD || !nitems) &&
- (cur->fts_level == FTS_ROOTLEVEL ?
- FCHDIR(sp, sp->fts_rfd) : CHDIR(sp, ".."))) {
+ (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);
return (NULL);
}
static u_short
-fts_stat(sp, p, follow)
- FTS *sp;
- register FTSENT *p;
- int follow;
+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)
{
- register FTSENT *t;
- register dev_t dev;
- register ino_t ino;
+ 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;
-#ifdef FTS_WHITEOUT
- /* 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.
+ * 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 (ISSET(FTS_LOGICAL) || follow) {
- if (stat(p->fts_accpath, sbp)) {
+ 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 (!lstat(p->fts_accpath, sbp)) {
+ 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;
}
* a directory
*/
if (follow == -1 && !S_ISDIR(sbp->st_mode)) {
- if (lstat(p->fts_accpath, sbp)) {
+ if (fstatat(dfd, path, sbp, AT_SYMLINK_NOFOLLOW)) {
p->fts_errno = errno;
goto err;
}
}
- } else if (lstat(p->fts_accpath, sbp)) {
+ } else if (fstatat(dfd, path, sbp, AT_SYMLINK_NOFOLLOW)) {
p->fts_errno = errno;
err: memset(sbp, 0, sizeof(struct stat));
return (FTS_NS);
}
static FTSENT *
-fts_sort(sp, head, nitems)
- FTS *sp;
- FTSENT *head;
- register int nitems;
+fts_sort(FTS *sp, FTSENT *head, int nitems)
{
- register FTSENT **ap, *p;
+ FTSENT **ap, *p;
/*
* Construct an array of pointers to the structures and call qsort(3).
* 40 so don't realloc one entry at a time.
*/
if (nitems > sp->fts_nitems) {
+ struct _ftsent **a;
+
sp->fts_nitems = nitems + 40;
- if ((sp->fts_array = realloc(sp->fts_array,
- (size_t)(sp->fts_nitems * sizeof(FTSENT *)))) == NULL) {
+ 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;
}
static FTSENT *
-fts_alloc(sp, name, namelen)
- FTS *sp;
- char *name;
- register int namelen;
+fts_alloc(FTS *sp, char *name, int namelen)
{
- register FTSENT *p;
+ FTSENT *p;
size_t len;
/*
len = sizeof(FTSENT) + namelen;
if (!ISSET(FTS_NOSTAT))
len += sizeof(struct stat) + ALIGNBYTES;
- if ((p = malloc(len)) == NULL)
+ if ((p = calloc(1, len)) == NULL)
return (NULL);
- /* Copy the name plus the trailing NULL. */
- memmove(p->fts_name, name, namelen + 1);
-
- 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_namelen = namelen;
p->fts_instr = FTS_NOINSTR;
- p->fts_number = 0;
- p->fts_pointer = NULL;
+ 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_lfree(head)
- register FTSENT *head;
+fts_lfree(FTSENT *head)
{
- register FTSENT *p;
+ FTSENT *p;
/* Free a linked list of structures. */
while ((p = head)) {
/*
* 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
+ * 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(sp, more)
- FTS *sp;
- size_t more;
+fts_palloc(FTS *sp, size_t more)
{
+ char *p;
+
sp->fts_pathlen += more + 256;
- sp->fts_path = realloc(sp->fts_path, (size_t)sp->fts_pathlen);
- return (sp->fts_path == NULL);
+ /*
+ * 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);
}
/*
* already returned.
*/
static void
-fts_padjust(FTS *sp, void *addr)
+fts_padjust(FTS *sp, FTSENT *head)
{
FTSENT *p;
+ char *addr = sp->fts_path;
-#define ADJUST(p) do { \
+#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; \
-} 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. */
- for (p = sp->fts_cur; p->fts_level >= FTS_ROOTLEVEL;) {
+ /* 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(argv)
- char * const *argv;
+fts_maxarglen(char * const *argv)
{
size_t len, 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, 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;
+ }
+ 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);
+}
projects / apple / libc.git / blobdiff