libarchive/archive_read_disk_entry_from_file.c - third_party/libarchive - Git at Google

 /*-
  * Copyright (c) 2003-2009 Tim Kientzle
  * 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.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``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 AUTHOR(S) 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 "archive_platform.h"
 __FBSDID("$FreeBSD: head/lib/libarchive/archive_read_disk_entry_from_file.c 201084 2009-12-28 02:14:09Z kientzle $");

 #ifdef HAVE_SYS_TYPES_H
 /* Mac OSX requires sys/types.h before sys/acl.h. */
 #include <sys/types.h>
 #endif
 #ifdef HAVE_SYS_ACL_H
 #include <sys/acl.h>
 #endif
 #ifdef HAVE_SYS_EXTATTR_H
 #include <sys/extattr.h>
 #endif
 #ifdef HAVE_SYS_PARAM_H
 #include <sys/param.h>
 #endif
 #ifdef HAVE_SYS_STAT_H
 #include <sys/stat.h>
 #endif
 #ifdef HAVE_SYS_XATTR_H
 #include <sys/xattr.h>
 #endif
 #ifdef HAVE_ACL_LIBACL_H
 #include <acl/libacl.h>
 #endif
 #ifdef HAVE_ATTR_XATTR_H
 #include <attr/xattr.h>
 #endif
 #ifdef HAVE_ERRNO_H
 #include <errno.h>
 #endif
 #ifdef HAVE_LIMITS_H
 #include <limits.h>
 #endif
 #ifdef HAVE_WINDOWS_H
 #include <windows.h>
 #endif

 #include "archive.h"
 #include "archive_entry.h"
 #include "archive_private.h"
 #include "archive_read_disk_private.h"

 /*
  * Linux and FreeBSD plug this obvious hole in POSIX.1e in
  * different ways.
  */
 #if HAVE_ACL_GET_PERM
 #define	ACL_GET_PERM acl_get_perm
 #elif HAVE_ACL_GET_PERM_NP
 #define	ACL_GET_PERM acl_get_perm_np
 #endif

 static int setup_acls_posix1e(struct archive_read_disk *,
     struct archive_entry *, int fd);
 static int setup_xattrs(struct archive_read_disk *,
     struct archive_entry *, int fd);

 int
 archive_read_disk_entry_from_file(struct archive *_a,
     struct archive_entry *entry,
     int fd, const struct stat *st)
 {
 	struct archive_read_disk *a = (struct archive_read_disk *)_a;
 	const char *path, *name;
 	struct stat s;
 	int initial_fd = fd;
 	int r, r1;

 	archive_clear_error(_a);
 	path = archive_entry_sourcepath(entry);
 	if (path == NULL)
 		path = archive_entry_pathname(entry);

 #ifdef EXT2_IOC_GETFLAGS
 	/* Linux requires an extra ioctl to pull the flags.  Although
 	 * this is an extra step, it has a nice side-effect: We get an
 	 * open file descriptor which we can use in the subsequent lookups. */
 	if ((S_ISREG(st->st_mode) || S_ISDIR(st->st_mode))) {
 		if (fd < 0)
 			fd = open(pathname, O_RDONLY | O_NONBLOCK | O_BINARY);
 		if (fd >= 0) {
 			unsigned long stflags;
 			int r = ioctl(fd, EXT2_IOC_GETFLAGS, &stflags);
 			if (r == 0 && stflags != 0)
 				archive_entry_set_fflags(entry, stflags, 0);
 		}
 	}
 #endif

 	if (st == NULL) {
 		/* TODO: On Windows, use GetFileInfoByHandle() here.
 		 * Using Windows stat() call is badly broken, but
 		 * even the stat() wrapper has problems because
 		 * 'struct stat' is broken on Windows.
 		 */
 #if HAVE_FSTAT
 		if (fd >= 0) {
 			if (fstat(fd, &s) != 0) {
 				archive_set_error(&a->archive, errno,
 				    "Can't fstat");
 				return (ARCHIVE_FAILED);
 			}
 		} else
 #endif
 #if HAVE_LSTAT
 		if (!a->follow_symlinks) {
 			if (lstat(path, &s) != 0) {
 				archive_set_error(&a->archive, errno,
 				    "Can't lstat %s", path);
 				return (ARCHIVE_FAILED);
 			}
 		} else
 #endif
 		if (stat(path, &s) != 0) {
 			archive_set_error(&a->archive, errno,
 			    "Can't lstat %s", path);
 			return (ARCHIVE_FAILED);
 		}
 		st = &s;
 	}
 	archive_entry_copy_stat(entry, st);

 	/* Lookup uname/gname */
 	name = archive_read_disk_uname(_a, archive_entry_uid(entry));
 	if (name != NULL)
 		archive_entry_copy_uname(entry, name);
 	name = archive_read_disk_gname(_a, archive_entry_gid(entry));
 	if (name != NULL)
 		archive_entry_copy_gname(entry, name);

 #ifdef HAVE_STRUCT_STAT_ST_FLAGS
 	/* On FreeBSD, we get flags for free with the stat. */
 	/* TODO: Does this belong in copy_stat()? */
 	if (st->st_flags != 0)
 		archive_entry_set_fflags(entry, st->st_flags, 0);
 #endif

 #ifdef HAVE_READLINK
 	if (S_ISLNK(st->st_mode)) {
 		char linkbuffer[PATH_MAX + 1];
 		int lnklen = readlink(path, linkbuffer, PATH_MAX);
 		if (lnklen < 0) {
 			archive_set_error(&a->archive, errno,
 			    "Couldn't read link data");
 			return (ARCHIVE_FAILED);
 		}
 		linkbuffer[lnklen] = 0;
 		archive_entry_set_symlink(entry, linkbuffer);
 	}
 #endif

 	r = setup_acls_posix1e(a, entry, fd);
 	r1 = setup_xattrs(a, entry, fd);
 	if (r1 < r)
 		r = r1;
 	/* If we opened the file earlier in this function, close it. */
 	if (initial_fd != fd)
 		close(fd);
 	return (r);
 }

 #ifdef HAVE_POSIX_ACL
 static void setup_acl_posix1e(struct archive_read_disk *a,
     struct archive_entry *entry, acl_t acl, int archive_entry_acl_type);

 static int
 setup_acls_posix1e(struct archive_read_disk *a,
     struct archive_entry *entry, int fd)
 {
 	const char	*accpath;
 	acl_t		 acl;

 	accpath = archive_entry_sourcepath(entry);
 	if (accpath == NULL)
 		accpath = archive_entry_pathname(entry);

 	archive_entry_acl_clear(entry);

 	/* Retrieve access ACL from file. */
 	if (fd >= 0)
 		acl = acl_get_fd(fd);
 #if HAVE_ACL_GET_LINK_NP
 	else if (!a->follow_symlinks)
 		acl = acl_get_link_np(accpath, ACL_TYPE_ACCESS);
 #else
 	else if ((!a->follow_symlinks)
 	    && (archive_entry_filetype(entry) == AE_IFLNK)))
 		/* We can't get the ACL of a symlink, so we assume it can't
 		   have one. */
 		acl = NULL;
 #endif
 	else
 		acl = acl_get_file(accpath, ACL_TYPE_ACCESS);
 	if (acl != NULL) {
 		setup_acl_posix1e(a, entry, acl,
 		    ARCHIVE_ENTRY_ACL_TYPE_ACCESS);
 		acl_free(acl);
 	}

 	/* Only directories can have default ACLs. */
 	if (S_ISDIR(archive_entry_mode(entry))) {
 		acl = acl_get_file(accpath, ACL_TYPE_DEFAULT);
 		if (acl != NULL) {
 			setup_acl_posix1e(a, entry, acl,
 			    ARCHIVE_ENTRY_ACL_TYPE_DEFAULT);
 			acl_free(acl);
 		}
 	}
 	return (ARCHIVE_OK);
 }

 /*
  * Translate POSIX.1e ACL into libarchive internal structure.
  */
 static void
 setup_acl_posix1e(struct archive_read_disk *a,
     struct archive_entry *entry, acl_t acl, int archive_entry_acl_type)
 {
 	acl_tag_t	 acl_tag;
 	acl_entry_t	 acl_entry;
 	acl_permset_t	 acl_permset;
 	int		 s, ae_id, ae_tag, ae_perm;
 	const char	*ae_name;

 	s = acl_get_entry(acl, ACL_FIRST_ENTRY, &acl_entry);
 	while (s == 1) {
 		ae_id = -1;
 		ae_name = NULL;

 		acl_get_tag_type(acl_entry, &acl_tag);
 		if (acl_tag == ACL_USER) {
 			ae_id = (int)*(uid_t *)acl_get_qualifier(acl_entry);
 			ae_name = archive_read_disk_uname(&a->archive, ae_id);
 			ae_tag = ARCHIVE_ENTRY_ACL_USER;
 		} else if (acl_tag == ACL_GROUP) {
 			ae_id = (int)*(gid_t *)acl_get_qualifier(acl_entry);
 			ae_name = archive_read_disk_gname(&a->archive, ae_id);
 			ae_tag = ARCHIVE_ENTRY_ACL_GROUP;
 		} else if (acl_tag == ACL_MASK) {
 			ae_tag = ARCHIVE_ENTRY_ACL_MASK;
 		} else if (acl_tag == ACL_USER_OBJ) {
 			ae_tag = ARCHIVE_ENTRY_ACL_USER_OBJ;
 		} else if (acl_tag == ACL_GROUP_OBJ) {
 			ae_tag = ARCHIVE_ENTRY_ACL_GROUP_OBJ;
 		} else if (acl_tag == ACL_OTHER) {
 			ae_tag = ARCHIVE_ENTRY_ACL_OTHER;
 		} else {
 			/* Skip types that libarchive can't support. */
 			continue;
 		}

 		acl_get_permset(acl_entry, &acl_permset);
 		ae_perm = 0;
 		/*
 		 * acl_get_perm() is spelled differently on different
 		 * platforms; see above.
 		 */
 		if (ACL_GET_PERM(acl_permset, ACL_EXECUTE))
 			ae_perm |= ARCHIVE_ENTRY_ACL_EXECUTE;
 		if (ACL_GET_PERM(acl_permset, ACL_READ))
 			ae_perm |= ARCHIVE_ENTRY_ACL_READ;
 		if (ACL_GET_PERM(acl_permset, ACL_WRITE))
 			ae_perm |= ARCHIVE_ENTRY_ACL_WRITE;

 		archive_entry_acl_add_entry(entry,
 		    archive_entry_acl_type, ae_perm, ae_tag,
 		    ae_id, ae_name);

 		s = acl_get_entry(acl, ACL_NEXT_ENTRY, &acl_entry);
 	}
 }
 #else
 static int
 setup_acls_posix1e(struct archive_read_disk *a,
     struct archive_entry *entry, int fd)
 {
 	(void)a;      /* UNUSED */
 	(void)entry;  /* UNUSED */
 	(void)fd;     /* UNUSED */
 	return (ARCHIVE_OK);
 }
 #endif

 #if HAVE_LISTXATTR && HAVE_LLISTXATTR && HAVE_GETXATTR && HAVE_LGETXATTR

 /*
  * Linux extended attribute support.
  *
  * TODO:  By using a stack-allocated buffer for the first
  * call to getxattr(), we might be able to avoid the second
  * call entirely.  We only need the second call if the
  * stack-allocated buffer is too small.  But a modest buffer
  * of 1024 bytes or so will often be big enough.  Same applies
  * to listxattr().
  */


 static int
 setup_xattr(struct archive_read_disk *a,
     struct archive_entry *entry, const char *name, int fd)
 {
 	ssize_t size;
 	void *value = NULL;
 	const char *accpath;

 	(void)fd; /* UNUSED */

 	accpath = archive_entry_sourcepath(entry);
 	if (accpath == NULL)
 		accpath = archive_entry_pathname(entry);

 	if (!a->follow_symlinks)
 		size = lgetxattr(accpath, name, NULL, 0);
 	else
 		size = getxattr(accpath, name, NULL, 0);

 	if (size == -1) {
 		archive_set_error(&a->archive, errno,
 		    "Couldn't query extended attribute");
 		return (ARCHIVE_WARN);
 	}

 	if (size > 0 && (value = malloc(size)) == NULL) {
 		archive_set_error(&a->archive, errno, "Out of memory");
 		return (ARCHIVE_FATAL);
 	}

 	if (!a->follow_symlinks)
 		size = lgetxattr(accpath, name, value, size);
 	else
 		size = getxattr(accpath, name, value, size);

 	if (size == -1) {
 		archive_set_error(&a->archive, errno,
 		    "Couldn't read extended attribute");
 		return (ARCHIVE_WARN);
 	}

 	archive_entry_xattr_add_entry(entry, name, value, size);

 	free(value);
 	return (ARCHIVE_OK);
 }

 static int
 setup_xattrs(struct archive_read_disk *a,
     struct archive_entry *entry, int fd)
 {
 	char *list, *p;
 	const char *path;
 	ssize_t list_size;


 	path = archive_entry_sourcepath(entry);
 	if (path == NULL)
 		path = archive_entry_pathname(entry);

 	if (!a->follow_symlinks)
 		list_size = llistxattr(path, NULL, 0);
 	else
 		list_size = listxattr(path, NULL, 0);

 	if (list_size == -1) {
 		if (errno == ENOTSUP)
 			return (ARCHIVE_OK);
 		archive_set_error(&a->archive, errno,
 			"Couldn't list extended attributes");
 		return (ARCHIVE_WARN);
 	}

 	if (list_size == 0)
 		return (ARCHIVE_OK);

 	if ((list = malloc(list_size)) == NULL) {
 		archive_set_error(&a->archive, errno, "Out of memory");
 		return (ARCHIVE_FATAL);
 	}

 	if (!a->follow_symlinks)
 		list_size = llistxattr(path, list, list_size);
 	else
 		list_size = listxattr(path, list, list_size);

 	if (list_size == -1) {
 		archive_set_error(&a->archive, errno,
 			"Couldn't retrieve extended attributes");
 		free(list);
 		return (ARCHIVE_WARN);
 	}

 	for (p = list; (p - list) < list_size; p += strlen(p) + 1) {
 		if (strncmp(p, "system.", 7) == 0 ||
 				strncmp(p, "xfsroot.", 8) == 0)
 			continue;
 		setup_xattr(a, entry, p, fd);
 	}

 	free(list);
 	return (ARCHIVE_OK);
 }

 #elif HAVE_EXTATTR_GET_FILE && HAVE_EXTATTR_LIST_FILE

 /*
  * FreeBSD extattr interface.
  */

 /* TODO: Implement this.  Follow the Linux model above, but
  * with FreeBSD-specific system calls, of course.  Be careful
  * to not include the system extattrs that hold ACLs; we handle
  * those separately.
  */
 static int
 setup_xattr(struct archive_read_disk *a, struct archive_entry *entry,
     int namespace, const char *name, const char *fullname, int fd);

 static int
 setup_xattr(struct archive_read_disk *a, struct archive_entry *entry,
     int namespace, const char *name, const char *fullname, int fd)
 {
 	ssize_t size;
 	void *value = NULL;
 	const char *accpath;

 	(void)fd; /* UNUSED */

 	accpath = archive_entry_sourcepath(entry);
 	if (accpath == NULL)
 		accpath = archive_entry_pathname(entry);

 	if (!a->follow_symlinks)
 		size = extattr_get_link(accpath, namespace, name, NULL, 0);
 	else
 		size = extattr_get_file(accpath, namespace, name, NULL, 0);

 	if (size == -1) {
 		archive_set_error(&a->archive, errno,
 		    "Couldn't query extended attribute");
 		return (ARCHIVE_WARN);
 	}

 	if (size > 0 && (value = malloc(size)) == NULL) {
 		archive_set_error(&a->archive, errno, "Out of memory");
 		return (ARCHIVE_FATAL);
 	}

 	if (!a->follow_symlinks)
 		size = extattr_get_link(accpath, namespace, name, value, size);
 	else
 		size = extattr_get_file(accpath, namespace, name, value, size);

 	if (size == -1) {
 		archive_set_error(&a->archive, errno,
 		    "Couldn't read extended attribute");
 		return (ARCHIVE_WARN);
 	}

 	archive_entry_xattr_add_entry(entry, fullname, value, size);

 	free(value);
 	return (ARCHIVE_OK);
 }

 static int
 setup_xattrs(struct archive_read_disk *a,
     struct archive_entry *entry, int fd)
 {
 	char buff[512];
 	char *list, *p;
 	ssize_t list_size;
 	const char *path;
 	int namespace = EXTATTR_NAMESPACE_USER;

 	path = archive_entry_sourcepath(entry);
 	if (path == NULL)
 		path = archive_entry_pathname(entry);

 	if (!a->follow_symlinks)
 		list_size = extattr_list_link(path, namespace, NULL, 0);
 	else
 		list_size = extattr_list_file(path, namespace, NULL, 0);

 	if (list_size == -1 && errno == EOPNOTSUPP)
 		return (ARCHIVE_OK);
 	if (list_size == -1) {
 		archive_set_error(&a->archive, errno,
 			"Couldn't list extended attributes");
 		return (ARCHIVE_WARN);
 	}

 	if (list_size == 0)
 		return (ARCHIVE_OK);

 	if ((list = malloc(list_size)) == NULL) {
 		archive_set_error(&a->archive, errno, "Out of memory");
 		return (ARCHIVE_FATAL);
 	}

 	if (!a->follow_symlinks)
 		list_size = extattr_list_link(path, namespace, list, list_size);
 	else
 		list_size = extattr_list_file(path, namespace, list, list_size);

 	if (list_size == -1) {
 		archive_set_error(&a->archive, errno,
 			"Couldn't retrieve extended attributes");
 		free(list);
 		return (ARCHIVE_WARN);
 	}

 	p = list;
 	while ((p - list) < list_size) {
 		size_t len = 255 & (int)*p;
 		char *name;

 		strcpy(buff, "user.");
 		name = buff + strlen(buff);
 		memcpy(name, p + 1, len);
 		name[len] = '\0';
 		setup_xattr(a, entry, namespace, name, buff, fd);
 		p += 1 + len;
 	}

 	free(list);
 	return (ARCHIVE_OK);
 }

 #else

 /*
  * Generic (stub) extended attribute support.
  */
 static int
 setup_xattrs(struct archive_read_disk *a,
     struct archive_entry *entry, int fd)
 {
 	(void)a;     /* UNUSED */
 	(void)entry; /* UNUSED */
 	(void)fd;    /* UNUSED */
 	return (ARCHIVE_OK);
 }

 #endif
	/*-
	* Copyright (c) 2003-2009 Tim Kientzle
	* 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.
	*
	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``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 AUTHOR(S) 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 "archive_platform.h"
	__FBSDID("$FreeBSD: head/lib/libarchive/archive_read_disk_entry_from_file.c 201084 2009-12-28 02:14:09Z kientzle $");

	#ifdef HAVE_SYS_TYPES_H
	/* Mac OSX requires sys/types.h before sys/acl.h. */
	#include <sys/types.h>
	#endif
	#ifdef HAVE_SYS_ACL_H
	#include <sys/acl.h>
	#endif
	#ifdef HAVE_SYS_EXTATTR_H
	#include <sys/extattr.h>
	#endif
	#ifdef HAVE_SYS_PARAM_H
	#include <sys/param.h>
	#endif
	#ifdef HAVE_SYS_STAT_H
	#include <sys/stat.h>
	#endif
	#ifdef HAVE_SYS_XATTR_H
	#include <sys/xattr.h>
	#endif
	#ifdef HAVE_ACL_LIBACL_H
	#include <acl/libacl.h>
	#endif
	#ifdef HAVE_ATTR_XATTR_H
	#include <attr/xattr.h>
	#endif
	#ifdef HAVE_ERRNO_H
	#include <errno.h>
	#endif
	#ifdef HAVE_LIMITS_H
	#include <limits.h>
	#endif
	#ifdef HAVE_WINDOWS_H
	#include <windows.h>
	#endif

	#include "archive.h"
	#include "archive_entry.h"
	#include "archive_private.h"
	#include "archive_read_disk_private.h"

	/*
	* Linux and FreeBSD plug this obvious hole in POSIX.1e in
	* different ways.
	*/
	#if HAVE_ACL_GET_PERM
	#define ACL_GET_PERM acl_get_perm
	#elif HAVE_ACL_GET_PERM_NP
	#define ACL_GET_PERM acl_get_perm_np
	#endif

	static int setup_acls_posix1e(struct archive_read_disk *,
	struct archive_entry *, int fd);
	static int setup_xattrs(struct archive_read_disk *,
	struct archive_entry *, int fd);

	int
	archive_read_disk_entry_from_file(struct archive *_a,
	struct archive_entry *entry,
	int fd, const struct stat *st)
	{
	struct archive_read_disk a = (struct archive_read_disk )_a;
	const char path, name;
	struct stat s;
	int initial_fd = fd;
	int r, r1;

	archive_clear_error(_a);
	path = archive_entry_sourcepath(entry);
	if (path == NULL)
	path = archive_entry_pathname(entry);

	#ifdef EXT2_IOC_GETFLAGS
	/* Linux requires an extra ioctl to pull the flags. Although
	* this is an extra step, it has a nice side-effect: We get an
	* open file descriptor which we can use in the subsequent lookups. */
	if ((S_ISREG(st->st_mode) \|\| S_ISDIR(st->st_mode))) {
	if (fd < 0)
	fd = open(pathname, O_RDONLY \| O_NONBLOCK \| O_BINARY);
	if (fd >= 0) {
	unsigned long stflags;
	int r = ioctl(fd, EXT2_IOC_GETFLAGS, &stflags);
	if (r == 0 && stflags != 0)
	archive_entry_set_fflags(entry, stflags, 0);
	}
	}
	#endif

	if (st == NULL) {
	/* TODO: On Windows, use GetFileInfoByHandle() here.
	* Using Windows stat() call is badly broken, but
	* even the stat() wrapper has problems because
	* 'struct stat' is broken on Windows.
	*/
	#if HAVE_FSTAT
	if (fd >= 0) {
	if (fstat(fd, &s) != 0) {
	archive_set_error(&a->archive, errno,
	"Can't fstat");
	return (ARCHIVE_FAILED);
	}
	} else
	#endif
	#if HAVE_LSTAT
	if (!a->follow_symlinks) {
	if (lstat(path, &s) != 0) {
	archive_set_error(&a->archive, errno,
	"Can't lstat %s", path);
	return (ARCHIVE_FAILED);
	}
	} else
	#endif
	if (stat(path, &s) != 0) {
	archive_set_error(&a->archive, errno,
	"Can't lstat %s", path);
	return (ARCHIVE_FAILED);
	}
	st = &s;
	}
	archive_entry_copy_stat(entry, st);

	/* Lookup uname/gname */
	name = archive_read_disk_uname(_a, archive_entry_uid(entry));
	if (name != NULL)
	archive_entry_copy_uname(entry, name);
	name = archive_read_disk_gname(_a, archive_entry_gid(entry));
	if (name != NULL)
	archive_entry_copy_gname(entry, name);

	#ifdef HAVE_STRUCT_STAT_ST_FLAGS
	/* On FreeBSD, we get flags for free with the stat. */
	/* TODO: Does this belong in copy_stat()? */
	if (st->st_flags != 0)
	archive_entry_set_fflags(entry, st->st_flags, 0);
	#endif

	#ifdef HAVE_READLINK
	if (S_ISLNK(st->st_mode)) {
	char linkbuffer[PATH_MAX + 1];
	int lnklen = readlink(path, linkbuffer, PATH_MAX);
	if (lnklen < 0) {
	archive_set_error(&a->archive, errno,
	"Couldn't read link data");
	return (ARCHIVE_FAILED);
	}
	linkbuffer[lnklen] = 0;
	archive_entry_set_symlink(entry, linkbuffer);
	}
	#endif

	r = setup_acls_posix1e(a, entry, fd);
	r1 = setup_xattrs(a, entry, fd);
	if (r1 < r)
	r = r1;
	/* If we opened the file earlier in this function, close it. */
	if (initial_fd != fd)
	close(fd);
	return (r);
	}

	#ifdef HAVE_POSIX_ACL
	static void setup_acl_posix1e(struct archive_read_disk *a,
	struct archive_entry *entry, acl_t acl, int archive_entry_acl_type);

	static int
	setup_acls_posix1e(struct archive_read_disk *a,
	struct archive_entry *entry, int fd)
	{
	const char *accpath;
	acl_t acl;

	accpath = archive_entry_sourcepath(entry);
	if (accpath == NULL)
	accpath = archive_entry_pathname(entry);

	archive_entry_acl_clear(entry);

	/* Retrieve access ACL from file. */
	if (fd >= 0)
	acl = acl_get_fd(fd);
	#if HAVE_ACL_GET_LINK_NP
	else if (!a->follow_symlinks)
	acl = acl_get_link_np(accpath, ACL_TYPE_ACCESS);
	#else
	else if ((!a->follow_symlinks)
	&& (archive_entry_filetype(entry) == AE_IFLNK)))
	/* We can't get the ACL of a symlink, so we assume it can't
	have one. */
	acl = NULL;
	#endif
	else
	acl = acl_get_file(accpath, ACL_TYPE_ACCESS);
	if (acl != NULL) {
	setup_acl_posix1e(a, entry, acl,
	ARCHIVE_ENTRY_ACL_TYPE_ACCESS);
	acl_free(acl);
	}

	/* Only directories can have default ACLs. */
	if (S_ISDIR(archive_entry_mode(entry))) {
	acl = acl_get_file(accpath, ACL_TYPE_DEFAULT);
	if (acl != NULL) {
	setup_acl_posix1e(a, entry, acl,
	ARCHIVE_ENTRY_ACL_TYPE_DEFAULT);
	acl_free(acl);
	}
	}
	return (ARCHIVE_OK);
	}

	/*
	* Translate POSIX.1e ACL into libarchive internal structure.
	*/
	static void
	setup_acl_posix1e(struct archive_read_disk *a,
	struct archive_entry *entry, acl_t acl, int archive_entry_acl_type)
	{
	acl_tag_t acl_tag;
	acl_entry_t acl_entry;
	acl_permset_t acl_permset;
	int s, ae_id, ae_tag, ae_perm;
	const char *ae_name;

	s = acl_get_entry(acl, ACL_FIRST_ENTRY, &acl_entry);
	while (s == 1) {
	ae_id = -1;
	ae_name = NULL;

	acl_get_tag_type(acl_entry, &acl_tag);
	if (acl_tag == ACL_USER) {
	ae_id = (int)(uid_t )acl_get_qualifier(acl_entry);
	ae_name = archive_read_disk_uname(&a->archive, ae_id);
	ae_tag = ARCHIVE_ENTRY_ACL_USER;
	} else if (acl_tag == ACL_GROUP) {
	ae_id = (int)(gid_t )acl_get_qualifier(acl_entry);
	ae_name = archive_read_disk_gname(&a->archive, ae_id);
	ae_tag = ARCHIVE_ENTRY_ACL_GROUP;
	} else if (acl_tag == ACL_MASK) {
	ae_tag = ARCHIVE_ENTRY_ACL_MASK;
	} else if (acl_tag == ACL_USER_OBJ) {
	ae_tag = ARCHIVE_ENTRY_ACL_USER_OBJ;
	} else if (acl_tag == ACL_GROUP_OBJ) {
	ae_tag = ARCHIVE_ENTRY_ACL_GROUP_OBJ;
	} else if (acl_tag == ACL_OTHER) {
	ae_tag = ARCHIVE_ENTRY_ACL_OTHER;
	} else {
	/* Skip types that libarchive can't support. */
	continue;
	}

	acl_get_permset(acl_entry, &acl_permset);
	ae_perm = 0;
	/*
	* acl_get_perm() is spelled differently on different
	* platforms; see above.
	*/
	if (ACL_GET_PERM(acl_permset, ACL_EXECUTE))
	ae_perm \|= ARCHIVE_ENTRY_ACL_EXECUTE;
	if (ACL_GET_PERM(acl_permset, ACL_READ))
	ae_perm \|= ARCHIVE_ENTRY_ACL_READ;
	if (ACL_GET_PERM(acl_permset, ACL_WRITE))
	ae_perm \|= ARCHIVE_ENTRY_ACL_WRITE;

	archive_entry_acl_add_entry(entry,
	archive_entry_acl_type, ae_perm, ae_tag,
	ae_id, ae_name);

	s = acl_get_entry(acl, ACL_NEXT_ENTRY, &acl_entry);
	}
	}
	#else
	static int
	setup_acls_posix1e(struct archive_read_disk *a,
	struct archive_entry *entry, int fd)
	{
	(void)a; /* UNUSED */
	(void)entry; /* UNUSED */
	(void)fd; /* UNUSED */
	return (ARCHIVE_OK);
	}
	#endif

	#if HAVE_LISTXATTR && HAVE_LLISTXATTR && HAVE_GETXATTR && HAVE_LGETXATTR

	/*
	* Linux extended attribute support.
	*
	* TODO: By using a stack-allocated buffer for the first
	* call to getxattr(), we might be able to avoid the second
	* call entirely. We only need the second call if the
	* stack-allocated buffer is too small. But a modest buffer
	* of 1024 bytes or so will often be big enough. Same applies
	* to listxattr().
	*/


	static int
	setup_xattr(struct archive_read_disk *a,
	struct archive_entry entry, const char name, int fd)
	{
	ssize_t size;
	void *value = NULL;
	const char *accpath;

	(void)fd; /* UNUSED */

	accpath = archive_entry_sourcepath(entry);
	if (accpath == NULL)
	accpath = archive_entry_pathname(entry);

	if (!a->follow_symlinks)
	size = lgetxattr(accpath, name, NULL, 0);
	else
	size = getxattr(accpath, name, NULL, 0);

	if (size == -1) {
	archive_set_error(&a->archive, errno,
	"Couldn't query extended attribute");
	return (ARCHIVE_WARN);
	}

	if (size > 0 && (value = malloc(size)) == NULL) {
	archive_set_error(&a->archive, errno, "Out of memory");
	return (ARCHIVE_FATAL);
	}

	if (!a->follow_symlinks)
	size = lgetxattr(accpath, name, value, size);
	else
	size = getxattr(accpath, name, value, size);

	if (size == -1) {
	archive_set_error(&a->archive, errno,
	"Couldn't read extended attribute");
	return (ARCHIVE_WARN);
	}

	archive_entry_xattr_add_entry(entry, name, value, size);

	free(value);
	return (ARCHIVE_OK);
	}

	static int
	setup_xattrs(struct archive_read_disk *a,
	struct archive_entry *entry, int fd)
	{
	char list, p;
	const char *path;
	ssize_t list_size;


	path = archive_entry_sourcepath(entry);
	if (path == NULL)
	path = archive_entry_pathname(entry);

	if (!a->follow_symlinks)
	list_size = llistxattr(path, NULL, 0);
	else
	list_size = listxattr(path, NULL, 0);

	if (list_size == -1) {
	if (errno == ENOTSUP)
	return (ARCHIVE_OK);
	archive_set_error(&a->archive, errno,
	"Couldn't list extended attributes");
	return (ARCHIVE_WARN);
	}

	if (list_size == 0)
	return (ARCHIVE_OK);

	if ((list = malloc(list_size)) == NULL) {
	archive_set_error(&a->archive, errno, "Out of memory");
	return (ARCHIVE_FATAL);
	}

	if (!a->follow_symlinks)
	list_size = llistxattr(path, list, list_size);
	else
	list_size = listxattr(path, list, list_size);

	if (list_size == -1) {
	archive_set_error(&a->archive, errno,
	"Couldn't retrieve extended attributes");
	free(list);
	return (ARCHIVE_WARN);
	}

	for (p = list; (p - list) < list_size; p += strlen(p) + 1) {
	if (strncmp(p, "system.", 7) == 0 \|\|
	strncmp(p, "xfsroot.", 8) == 0)
	continue;
	setup_xattr(a, entry, p, fd);
	}

	free(list);
	return (ARCHIVE_OK);
	}

	#elif HAVE_EXTATTR_GET_FILE && HAVE_EXTATTR_LIST_FILE

	/*
	* FreeBSD extattr interface.
	*/

	/* TODO: Implement this. Follow the Linux model above, but
	* with FreeBSD-specific system calls, of course. Be careful
	* to not include the system extattrs that hold ACLs; we handle
	* those separately.
	*/
	static int
	setup_xattr(struct archive_read_disk a, struct archive_entry entry,
	int namespace, const char name, const char fullname, int fd);

	static int
	setup_xattr(struct archive_read_disk a, struct archive_entry entry,
	int namespace, const char name, const char fullname, int fd)
	{
	ssize_t size;
	void *value = NULL;
	const char *accpath;

	(void)fd; /* UNUSED */

	accpath = archive_entry_sourcepath(entry);
	if (accpath == NULL)
	accpath = archive_entry_pathname(entry);

	if (!a->follow_symlinks)
	size = extattr_get_link(accpath, namespace, name, NULL, 0);
	else
	size = extattr_get_file(accpath, namespace, name, NULL, 0);

	if (size == -1) {
	archive_set_error(&a->archive, errno,
	"Couldn't query extended attribute");
	return (ARCHIVE_WARN);
	}

	if (size > 0 && (value = malloc(size)) == NULL) {
	archive_set_error(&a->archive, errno, "Out of memory");
	return (ARCHIVE_FATAL);
	}

	if (!a->follow_symlinks)
	size = extattr_get_link(accpath, namespace, name, value, size);
	else
	size = extattr_get_file(accpath, namespace, name, value, size);

	if (size == -1) {
	archive_set_error(&a->archive, errno,
	"Couldn't read extended attribute");
	return (ARCHIVE_WARN);
	}

	archive_entry_xattr_add_entry(entry, fullname, value, size);

	free(value);
	return (ARCHIVE_OK);
	}

	static int
	setup_xattrs(struct archive_read_disk *a,
	struct archive_entry *entry, int fd)
	{
	char buff[512];
	char list, p;
	ssize_t list_size;
	const char *path;
	int namespace = EXTATTR_NAMESPACE_USER;

	path = archive_entry_sourcepath(entry);
	if (path == NULL)
	path = archive_entry_pathname(entry);

	if (!a->follow_symlinks)
	list_size = extattr_list_link(path, namespace, NULL, 0);
	else
	list_size = extattr_list_file(path, namespace, NULL, 0);

	if (list_size == -1 && errno == EOPNOTSUPP)
	return (ARCHIVE_OK);
	if (list_size == -1) {
	archive_set_error(&a->archive, errno,
	"Couldn't list extended attributes");
	return (ARCHIVE_WARN);
	}

	if (list_size == 0)
	return (ARCHIVE_OK);

	if ((list = malloc(list_size)) == NULL) {
	archive_set_error(&a->archive, errno, "Out of memory");
	return (ARCHIVE_FATAL);
	}

	if (!a->follow_symlinks)
	list_size = extattr_list_link(path, namespace, list, list_size);
	else
	list_size = extattr_list_file(path, namespace, list, list_size);

	if (list_size == -1) {
	archive_set_error(&a->archive, errno,
	"Couldn't retrieve extended attributes");
	free(list);
	return (ARCHIVE_WARN);
	}

	p = list;
	while ((p - list) < list_size) {
	size_t len = 255 & (int)*p;
	char *name;

	strcpy(buff, "user.");
	name = buff + strlen(buff);
	memcpy(name, p + 1, len);
	name[len] = '\0';
	setup_xattr(a, entry, namespace, name, buff, fd);
	p += 1 + len;
	}

	free(list);
	return (ARCHIVE_OK);
	}

	#else

	/*
	* Generic (stub) extended attribute support.
	*/
	static int
	setup_xattrs(struct archive_read_disk *a,
	struct archive_entry *entry, int fd)
	{
	(void)a; /* UNUSED */
	(void)entry; /* UNUSED */
	(void)fd; /* UNUSED */
	return (ARCHIVE_OK);
	}

	#endif