text: /*
   * Routines that are exclusive to the generator process.
   *
   * Copyright (C) 1996-2000 Andrew Tridgell
   * Copyright (C) 1996 Paul Mackerras
   * Copyright (C) 2002 Martin Pool <mbp@samba.org>
   * Copyright (C) 2003-2009 Wayne Davison
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 3 of the License, or
   * (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License along
   * with this program; if not, visit the http://fsf.org website.
   */
  
  #include "rsync.h"
  #include "inums.h"
  #include "ifuncs.h"
  
  extern int dry_run;
  extern int do_xfers;
  extern int stdout_format_has_i;
  extern int logfile_format_has_i;
  extern int am_root;
  extern int am_server;
  extern int am_daemon;
  extern int inc_recurse;
  extern int relative_paths;
  extern int implied_dirs;
  extern int keep_dirlinks;
  extern int preserve_acls;
  extern int preserve_xattrs;
  extern int preserve_links;
  extern int preserve_devices;
  extern int preserve_specials;
  extern int preserve_hard_links;
  extern int preserve_executability;
  extern int preserve_perms;
  extern int preserve_times;
  extern int delete_mode;
  extern int delete_before;
  extern int delete_during;
  extern int delete_after;
  extern int missing_args;
  extern int msgdone_cnt;
  extern int ignore_errors;
  extern int remove_source_files;
  extern int delay_updates;
  extern int update_only;
  extern int human_readable;
  extern int ignore_existing;
  extern int ignore_non_existing;
  extern int inplace;
  extern int append_mode;
  extern int make_backups;
  extern int csum_length;
  extern int ignore_times;
  extern int size_only;
  extern OFF_T max_size;
  extern OFF_T min_size;
  extern int io_error;
  extern int flist_eof;
  extern int allowed_lull;
  extern int sock_f_out;
  extern int protocol_version;
  extern int file_total;
  extern int fuzzy_basis;
  extern int always_checksum;
  extern int checksum_len;
  extern char *partial_dir;
  extern int compare_dest;
  extern int copy_dest;
  extern int link_dest;
  extern int whole_file;
  extern int list_only;
  extern int read_batch;
  extern int safe_symlinks;
  extern long block_size; /* "long" because popt can't set an int32. */
  extern int unsort_ndx;
  extern int max_delete;
  extern int force_delete;
  extern int one_file_system;
  extern int skipped_deletes;
  extern dev_t filesystem_dev;
  extern mode_t orig_umask;
  extern uid_t our_uid;
  extern char *tmpdir;
  extern char *basis_dir[MAX_BASIS_DIRS+1];
  extern struct file_list *cur_flist, *first_flist, *dir_flist;
  extern filter_rule_list filter_list, daemon_filter_list;
  
  int maybe_ATTRS_REPORT = 0;
  
  static dev_t dev_zero;
  static int deldelay_size = 0, deldelay_cnt = 0;
  static char *deldelay_buf = NULL;
  static int deldelay_fd = -1;
  static int loopchk_limit;
  static int dir_tweaking;
  static int symlink_timeset_failed_flags;
  static int need_retouch_dir_times;
  static int need_retouch_dir_perms;
  static const char *solo_file = NULL;
  
  enum nonregtype {
      TYPE_DIR, TYPE_SPECIAL, TYPE_DEVICE, TYPE_SYMLINK
  };
  
  /* Forward declarations. */
  #ifdef SUPPORT_HARD_LINKS
  static void handle_skipped_hlink(struct file_struct *file, int itemizing,
  				 enum logcode code, int f_out);
  #endif
  
  #define EARLY_DELAY_DONE_MSG() (!delay_updates)
  #define EARLY_DELETE_DONE_MSG() (!(delete_during == 2 || delete_after))
  
  static int start_delete_delay_temp(void)
  {
  	char fnametmp[MAXPATHLEN];
  	int save_dry_run = dry_run;
  
  	dry_run = 0;
  	if (!get_tmpname(fnametmp, "deldelay", False)
  	 || (deldelay_fd = do_mkstemp(fnametmp, 0600)) < 0) {
  		rprintf(FINFO, "NOTE: Unable to create delete-delay temp file%s.\n",
  			inc_recurse ? "" : " -- switching to --delete-after");
  		delete_during = 0;
  		delete_after = !inc_recurse;
  		dry_run = save_dry_run;
  		return 0;
  	}
  	unlink(fnametmp);
  	dry_run = save_dry_run;
  	return 1;
  }
  
  static int flush_delete_delay(void)
  {
  	if (deldelay_fd < 0 && !start_delete_delay_temp())
  		return 0;
  	if (write(deldelay_fd, deldelay_buf, deldelay_cnt) != deldelay_cnt) {
  		rsyserr(FERROR, errno, "flush of delete-delay buffer");
  		delete_during = 0;
  		delete_after = !inc_recurse;
  		close(deldelay_fd);
  		return 0;
  	}
  	deldelay_cnt = 0;
  	return 1;
  }
  
  static int remember_delete(struct file_struct *file, const char *fname, int flags)
  {
  	int len;
  
  	if (deldelay_cnt == deldelay_size && !flush_delete_delay())
  		return 0;
  
  	if (flags & DEL_NO_UID_WRITE)
  		deldelay_buf[deldelay_cnt++] = '!';
  
  	while (1) {
  		len = snprintf(deldelay_buf + deldelay_cnt,
  			       deldelay_size - deldelay_cnt,
  			       "%x %s%c",
  			       (int)file->mode, fname, '\0');
  		if ((deldelay_cnt += len) <= deldelay_size)
  			break;
  		deldelay_cnt -= len;
  		if (!flush_delete_delay())
  			return 0;
  	}
  
  	return 1;
  }
  
  static int read_delay_line(char *buf, int *flags_p)
  {
  	static int read_pos = 0;
  	int j, len, mode;
  	char *bp, *past_space;
  
  	while (1) {
  		for (j = read_pos; j < deldelay_cnt && deldelay_buf[j]; j++) {}
  		if (j < deldelay_cnt)
  			break;
  		if (deldelay_fd < 0) {
  			if (j > read_pos)
  				goto invalid_data;
  			return -1;
  		}
  		deldelay_cnt -= read_pos;
  		if (deldelay_cnt == deldelay_size)
  			goto invalid_data;
  		if (deldelay_cnt && read_pos) {
  			memmove(deldelay_buf, deldelay_buf + read_pos,
  				deldelay_cnt);
  		}
  		len = read(deldelay_fd, deldelay_buf + deldelay_cnt,
  			   deldelay_size - deldelay_cnt);
  		if (len == 0) {
  			if (deldelay_cnt) {
  				rprintf(FERROR,
  				    "ERROR: unexpected EOF in delete-delay file.\n");
  			}
  			return -1;
  		}
  		if (len < 0) {
  			rsyserr(FERROR, errno,
  				"reading delete-delay file");
  			return -1;
  		}
  		deldelay_cnt += len;
  		read_pos = 0;
  	}
  
  	bp = deldelay_buf + read_pos;
  	if (*bp == '!') {
  		bp++;
  		*flags_p = DEL_NO_UID_WRITE;
  	} else
  		*flags_p = 0;
  
  	if (sscanf(bp, "%x ", &mode) != 1) {
  	  invalid_data:
  		rprintf(FERROR, "ERROR: invalid data in delete-delay file.\n");
  		return -1;
  	}
  	past_space = strchr(bp, ' ') + 1;
  	len = j - read_pos - (past_space - bp) + 1; /* count the '\0' */
  	read_pos = j + 1;
  
  	if (len > MAXPATHLEN) {
  		rprintf(FERROR, "ERROR: filename too long in delete-delay file.\n");
  		return -1;
  	}
  
  	/* The caller needs the name in a MAXPATHLEN buffer, so we copy it
  	 * instead of returning a pointer to our buffer. */
  	memcpy(buf, past_space, len);
  
  	return mode;
  }
  
  static void do_delayed_deletions(char *delbuf)
  {
  	int mode, flags;
  
  	if (deldelay_fd >= 0) {
  		if (deldelay_cnt && !flush_delete_delay())
  			return;
  		lseek(deldelay_fd, 0, 0);
  	}
  	while ((mode = read_delay_line(delbuf, &flags)) >= 0)
  		delete_item(delbuf, mode, flags | DEL_RECURSE);
  	if (deldelay_fd >= 0)
  		close(deldelay_fd);
  }
  
  /* This function is used to implement per-directory deletion, and is used by
   * all the --delete-WHEN options.  Note that the fbuf pointer must point to a
   * MAXPATHLEN buffer with the name of the directory in it (the functions we
   * call will append names onto the end, but the old dir value will be restored
   * on exit). */
  static void delete_in_dir(char *fbuf, struct file_struct *file, dev_t *fs_dev)
  {
  	static int already_warned = 0;
  	struct file_list *dirlist;
  	char delbuf[MAXPATHLEN];
  	int dlen, i;
  
  	if (!fbuf) {
  		change_local_filter_dir(NULL, 0, 0);
  		return;
  	}
  
  	if (DEBUG_GTE(DEL, 2))
  		rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
  
  	if (allowed_lull)
  		maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
  
  	if (io_error && !ignore_errors) {
  		if (already_warned)
  			return;
  		rprintf(FINFO,
  			"IO error encountered -- skipping file deletion\n");
  		already_warned = 1;
  		return;
  	}
  
  	dlen = strlen(fbuf);
  	change_local_filter_dir(fbuf, dlen, F_DEPTH(file));
  
  	if (one_file_system) {
  		if (file->flags & FLAG_TOP_DIR)
  			filesystem_dev = *fs_dev;
  		else if (filesystem_dev != *fs_dev)
  			return;
  	}
  
  	dirlist = get_dirlist(fbuf, dlen, 0);
  
  	/* If an item in dirlist is not found in flist, delete it
  	 * from the filesystem. */
  	for (i = dirlist->used; i--; ) {
  		struct file_struct *fp = dirlist->files[i];
  		if (!F_IS_ACTIVE(fp))
  			continue;
  		if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
  			if (INFO_GTE(MOUNT, 1))
  				rprintf(FINFO, "cannot delete mount point: %s\n",
  					f_name(fp, NULL));
  			continue;
  		}
  		/* Here we want to match regardless of file type.  Replacement
  		 * of a file with one of another type is handled separately by
  		 * a delete_item call with a DEL_MAKE_ROOM flag. */
  		if (flist_find_ignore_dirness(cur_flist, fp) < 0) {
  			int flags = DEL_RECURSE;
  			if (!(fp->mode & S_IWUSR) && !am_root && fp->flags & FLAG_OWNED_BY_US)
  				flags |= DEL_NO_UID_WRITE;
  			f_name(fp, delbuf);
  			if (delete_during == 2) {
  				if (!remember_delete(fp, delbuf, flags))
  					break;
  			} else
  				delete_item(delbuf, fp->mode, flags);
  		}
  	}
  
  	flist_free(dirlist);
  }
  
  /* This deletes any files on the receiving side that are not present on the
   * sending side.  This is used by --delete-before and --delete-after. */
  static void do_delete_pass(void)
  {
  	char fbuf[MAXPATHLEN];
  	STRUCT_STAT st;
  	int j;
  
  	/* dry_run is incremented when the destination doesn't exist yet. */
  	if (dry_run > 1 || list_only)
  		return;
  
  	for (j = 0; j < cur_flist->used; j++) {
  		struct file_struct *file = cur_flist->sorted[j];
  
  		f_name(file, fbuf);
  
  		if (!(file->flags & FLAG_CONTENT_DIR)) {
  			change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(file));
  			continue;
  		}
  
  		if (DEBUG_GTE(DEL, 1) && file->flags & FLAG_TOP_DIR)
  			rprintf(FINFO, "deleting in %s\n", fbuf);
  
  		if (link_stat(fbuf, &st, keep_dirlinks) < 0
  		 || !S_ISDIR(st.st_mode))
  			continue;
  
  		delete_in_dir(fbuf, file, &st.st_dev);
  	}
  	delete_in_dir(NULL, NULL, &dev_zero);
  
  	if (INFO_GTE(FLIST, 2) && !am_server)
  		rprintf(FINFO, "                    \r");
  }
  
  static inline int time_differs(struct file_struct *file, stat_x *sxp)
  {
  	return cmp_time(sxp->st.st_mtime, file->modtime);
  }
  
  static inline int perms_differ(struct file_struct *file, stat_x *sxp)
  {
  	if (preserve_perms)
  		return !BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS);
  
  	if (preserve_executability)
  		return (sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0);
  
  	return 0;
  }
  
  static inline int ownership_differs(struct file_struct *file, stat_x *sxp)
  {
  	if (am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file))
  		return 1;
  
  	if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
  		return 1;
  
  	return 0;
  }
  
  #ifdef SUPPORT_ACLS
  static inline int acls_differ(const char *fname, struct file_struct *file, stat_x *sxp)
  {
  	if (preserve_acls) {
  		if (!ACL_READY(*sxp))
  			get_acl(fname, sxp);
  		if (set_acl(NULL, file, sxp, file->mode))
  			return 1;
  	}
  
  	return 0;
  }
  #endif
  
  #ifdef SUPPORT_XATTRS
  static inline int xattrs_differ(const char *fname, struct file_struct *file, stat_x *sxp)
  {
  	if (preserve_xattrs) {
  		if (!XATTR_READY(*sxp))
  			get_xattr(fname, sxp);
  		if (xattr_diff(file, sxp, 0))
  			return 1;
  	}
  
  	return 0;
  }
  #endif
  
  int unchanged_attrs(const char *fname, struct file_struct *file, stat_x *sxp)
  {
  	if (S_ISLNK(file->mode)) {
  #ifdef CAN_SET_SYMLINK_TIMES
  		if (preserve_times & PRESERVE_LINK_TIMES && time_differs(file, sxp))
  			return 0;
  #endif
  #ifdef CAN_CHMOD_SYMLINK
  		if (perms_differ(file, sxp))
  			return 0;
  #endif
  #ifndef CAN_CHOWN_SYMLINK
  		if (ownership_differs(file, sxp))
  			return 0;
  #endif
  #if defined SUPPORT_ACLS && 0 /* no current symlink-ACL support */
  		if (acls_differ(fname, file, sxp))
  			return 0;
  #endif
  #if defined SUPPORT_XATTRS && !defined NO_SYMLINK_XATTRS
  		if (xattrs_differ(fname, file, sxp))
  			return 0;
  #endif
  	} else {
  		if (preserve_times && time_differs(file, sxp))
  			return 0;
  		if (perms_differ(file, sxp))
  			return 0;
  		if (ownership_differs(file, sxp))
  			return 0;
  #ifdef SUPPORT_ACLS
  		if (acls_differ(fname, file, sxp))
  			return 0;
  #endif
  #ifdef SUPPORT_XATTRS
  		if (xattrs_differ(fname, file, sxp))
  			return 0;
  #endif
  	}
  
  	return 1;
  }
  
  void itemize(const char *fnamecmp, struct file_struct *file, int ndx, int statret,
  	     stat_x *sxp, int32 iflags, uchar fnamecmp_type,
  	     const char *xname)
  {
  	if (statret >= 0) { /* A from-dest-dir statret can == 1! */
  		int keep_time = !preserve_times ? 0
  		    : S_ISDIR(file->mode) ? preserve_times & PRESERVE_DIR_TIMES
  		    : S_ISLNK(file->mode) ? preserve_times & PRESERVE_LINK_TIMES
  		    : 1;
  
  		if (S_ISREG(file->mode) && F_LENGTH(file) != sxp->st.st_size)
  			iflags |= ITEM_REPORT_SIZE;
  		if (file->flags & FLAG_TIME_FAILED) { /* symlinks only */
  			if (iflags & ITEM_LOCAL_CHANGE)
  				iflags |= symlink_timeset_failed_flags;
  		} else if (keep_time
  		 ? cmp_time(file->modtime, sxp->st.st_mtime) != 0
  		 : iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !(iflags & ITEM_MATCHED)
  		  && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
  			iflags |= ITEM_REPORT_TIME;
  #if !defined HAVE_LCHMOD && !defined HAVE_SETATTRLIST
  		if (S_ISLNK(file->mode)) {
  			;
  		} else
  #endif
  		if (preserve_perms) {
  			if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
  				iflags |= ITEM_REPORT_PERMS;
  		} else if (preserve_executability
  		 && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
  			iflags |= ITEM_REPORT_PERMS;
  		if (uid_ndx && am_root && (uid_t)F_OWNER(file) != sxp->st.st_uid)
  			iflags |= ITEM_REPORT_OWNER;
  		if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP)
  		    && sxp->st.st_gid != (gid_t)F_GROUP(file))
  			iflags |= ITEM_REPORT_GROUP;
  #ifdef SUPPORT_ACLS
  		if (preserve_acls && !S_ISLNK(file->mode)) {
  			if (!ACL_READY(*sxp))
  				get_acl(fnamecmp, sxp);
  			if (set_acl(NULL, file, sxp, file->mode))
  				iflags |= ITEM_REPORT_ACL;
  		}
  #endif
  #ifdef SUPPORT_XATTRS
  		if (preserve_xattrs) {
  			if (!XATTR_READY(*sxp))
  				get_xattr(fnamecmp, sxp);
  			if (xattr_diff(file, sxp, 1))
  				iflags |= ITEM_REPORT_XATTR;
  		}
  #endif
  	} else {
  #ifdef SUPPORT_XATTRS
  		if (preserve_xattrs && xattr_diff(file, NULL, 1))
  			iflags |= ITEM_REPORT_XATTR;
  #endif
  		iflags |= ITEM_IS_NEW;
  	}
  
  	iflags &= 0xffff;
  	if ((iflags & (SIGNIFICANT_ITEM_FLAGS|ITEM_REPORT_XATTR) || INFO_GTE(NAME, 2)
  	  || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
  		if (protocol_version >= 29) {
  			if (ndx >= 0)
  				write_ndx(sock_f_out, ndx);
  			write_shortint(sock_f_out, iflags);
  			if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
  				write_byte(sock_f_out, fnamecmp_type);
  			if (iflags & ITEM_XNAME_FOLLOWS)
  				write_vstring(sock_f_out, xname, strlen(xname));
  #ifdef SUPPORT_XATTRS
  			if (preserve_xattrs && do_xfers
  			 && iflags & (ITEM_REPORT_XATTR|ITEM_TRANSFER)) {
  				send_xattr_request(NULL, file,
  					iflags & ITEM_REPORT_XATTR ? sock_f_out : -1);
  			}
  #endif
  		} else if (ndx >= 0) {
  			enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
  			log_item(code, file, iflags, xname);
  		}
  	}
  }
  
  
  /* Perform our quick-check heuristic for determining if a file is unchanged. */
  int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
  {
  	if (st->st_size != F_LENGTH(file))
  		return 0;
  
  	/* if always checksum is set then we use the checksum instead
  	   of the file time to determine whether to sync */
  	if (always_checksum > 0 && S_ISREG(st->st_mode)) {
  		char sum[MAX_DIGEST_LEN];
  		file_checksum(fn, sum, st->st_size);
  		return memcmp(sum, F_SUM(file), checksum_len) == 0;
  	}
  
  	if (size_only > 0)
  		return 1;
  
  	if (ignore_times)
  		return 0;
  
  	return cmp_time(st->st_mtime, file->modtime) == 0;
  }
  
  
  /*
   * set (initialize) the size entries in the per-file sum_struct
   * calculating dynamic block and checksum sizes.
   *
   * This is only called from generate_and_send_sums() but is a separate
   * function to encapsulate the logic.
   *
   * The block size is a rounded square root of file length.
   *
   * The checksum size is determined according to:
   *     blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
   * provided by Donovan Baarda which gives a probability of rsync
   * algorithm corrupting data and falling back using the whole md4
   * checksums.
   *
   * This might be made one of several selectable heuristics.
   */
  static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
  {
  	int32 blength;
  	int s2length;
  	int64 l;
  
  	if (len < 0) {
  		/* The file length overflowed our int64 var, so we can't process this file. */
  		sum->count = -1; /* indicate overflow error */
  		return;
  	}
  
  	if (block_size)
  		blength = block_size;
  	else if (len <= BLOCK_SIZE * BLOCK_SIZE)
  		blength = BLOCK_SIZE;
  	else {
  		int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE;
  		int32 c;
  		int cnt;
  		for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
  		if (c < 0 || c >= max_blength)
  			blength = max_blength;
  		else {
  		    blength = 0;
  		    do {
  			    blength |= c;
  			    if (len < (int64)blength * blength)
  				    blength &= ~c;
  			    c >>= 1;
  		    } while (c >= 8);	/* round to multiple of 8 */
  		    blength = MAX(blength, BLOCK_SIZE);
  		}
  	}
  
  	if (protocol_version < 27) {
  		s2length = csum_length;
  	} else if (csum_length == SUM_LENGTH) {
  		s2length = SUM_LENGTH;
  	} else {
  		int32 c;
  		int b = BLOCKSUM_BIAS;
  		for (l = len; l >>= 1; b += 2) {}
  		for (c = blength; (c >>= 1) && b; b--) {}
  		/* add a bit, subtract rollsum, round up. */
  		s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
  		s2length = MAX(s2length, csum_length);
  		s2length = MIN(s2length, SUM_LENGTH);
  	}
  
  	sum->flength	= len;
  	sum->blength	= blength;
  	sum->s2length	= s2length;
  	sum->remainder	= (int32)(len % blength);
  	sum->count	= (int32)(l = (len / blength) + (sum->remainder != 0));
  
  	if ((int64)sum->count != l)
  		sum->count = -1;
  
  	if (sum->count && DEBUG_GTE(DELTASUM, 2)) {
  		rprintf(FINFO,
  			"count=%s rem=%ld blength=%ld s2length=%d flength=%s\n",
  			big_num(sum->count), (long)sum->remainder, (long)sum->blength,
  			sum->s2length, big_num(sum->flength));
  	}
  }
  
  
  /*
   * Generate and send a stream of signatures/checksums that describe a buffer
   *
   * Generate approximately one checksum every block_len bytes.
   */
  static int generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
  {
  	int32 i;
  	struct map_struct *mapbuf;
  	struct sum_struct sum;
  	OFF_T offset = 0;
  
  	sum_sizes_sqroot(&sum, len);
  	if (sum.count < 0)
  		return -1;
  	write_sum_head(f_out, &sum);
  
  	if (append_mode > 0 && f_copy < 0)
  		return 0;
  
  	if (len > 0)
  		mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
  	else
  		mapbuf = NULL;
  
  	for (i = 0; i < sum.count; i++) {
  		int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
  		char *map = map_ptr(mapbuf, offset, n1);
  		char sum2[SUM_LENGTH];
  		uint32 sum1;
  
  		len -= n1;
  		offset += n1;
  
  		if (f_copy >= 0) {
  			full_write(f_copy, map, n1);
  			if (append_mode > 0)
  				continue;
  		}
  
  		sum1 = get_checksum1(map, n1);
  		get_checksum2(map, n1, sum2);
  
  		if (DEBUG_GTE(DELTASUM, 3)) {
  			rprintf(FINFO,
  				"chunk[%s] offset=%s len=%ld sum1=%08lx\n",
  				big_num(i), big_num(offset - n1), (long)n1,
  				(unsigned long)sum1);
  		}
  		write_int(f_out, sum1);
  		write_buf(f_out, sum2, sum.s2length);
  	}
  
  	if (mapbuf)
  		unmap_file(mapbuf);
  
  	return 0;
  }
  
  
  /* Try to find a filename in the same dir as "fname" with a similar name. */
  static int find_fuzzy(struct file_struct *file, struct file_list *dirlist)
  {
  	int fname_len, fname_suf_len;
  	const char *fname_suf, *fname = file->basename;
  	uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
  	int j, lowest_j = -1;
  
  	fname_len = strlen(fname);
  	fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
  
  	for (j = 0; j < dirlist->used; j++) {
  		struct file_struct *fp = dirlist->files[j];
  		const char *suf, *name;
  		int len, suf_len;
  		uint32 dist;
  
  		if (!S_ISREG(fp->mode) || !F_LENGTH(fp)
  		 || fp->flags & FLAG_FILE_SENT)
  			continue;
  
  		name = fp->basename;
  
  		if (F_LENGTH(fp) == F_LENGTH(file)
  		    && cmp_time(fp->modtime, file->modtime) == 0) {
  			if (DEBUG_GTE(FUZZY, 2)) {
  				rprintf(FINFO,
  					"fuzzy size/modtime match for %s\n",
  					name);
  			}
  			return j;
  		}
  
  		len = strlen(name);
  		suf = find_filename_suffix(name, len, &suf_len);
  
  		dist = fuzzy_distance(name, len, fname, fname_len);
  		/* Add some extra weight to how well the suffixes match. */
  		dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len)
  		      * 10;
  		if (DEBUG_GTE(FUZZY, 2)) {
  			rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
  				name, (int)(dist>>16), (int)(dist&0xFFFF));
  		}
  		if (dist <= lowest_dist) {
  			lowest_dist = dist;
  			lowest_j = j;
  		}
  	}
  
  	return lowest_j;
  }
  
  /* Copy a file found in our --copy-dest handling. */
  static int copy_altdest_file(const char *src, const char *dest, struct file_struct *file)
  {
  	char buf[MAXPATHLEN];
  	const char *copy_to, *partialptr;
  	int save_preserve_xattrs = preserve_xattrs;
  	int ok, fd_w;
  
  	if (inplace) {
  		/* Let copy_file open the destination in place. */
  		fd_w = -1;
  		copy_to = dest;
  	} else {
  		fd_w = open_tmpfile(buf, dest, file);
  		if (fd_w < 0)
  			return -1;
  		copy_to = buf;
  	}
  	cleanup_set(copy_to, NULL, NULL, -1, -1);
  	if (copy_file(src, copy_to, fd_w, file->mode) < 0) {
  		if (INFO_GTE(COPY, 1)) {
  			rsyserr(FINFO, errno, "copy_file %s => %s",
  				full_fname(src), copy_to);
  		}
  		/* Try to clean up. */
  		unlink(copy_to);
  		cleanup_disable();
  		return -1;
  	}
  	partialptr = partial_dir ? partial_dir_fname(dest) : NULL;
  	preserve_xattrs = 0; /* xattrs were copied with file */
  	ok = finish_transfer(dest, copy_to, src, partialptr, file, 1, 0);
  	preserve_xattrs = save_preserve_xattrs;
  	cleanup_disable();
  	return ok ? 0 : -1;
  }
  
  /* This is only called for regular files.  We return -2 if we've finished
   * handling the file, -1 if no dest-linking occurred, or a non-negative
   * value if we found an alternate basis file. */
  static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
  			 char *cmpbuf, stat_x *sxp, int itemizing,
  			 enum logcode code)
  {
  	int best_match = -1;
  	int match_level = 0;
  	int j = 0;
  
  	do {
  		pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
  		if (link_stat(cmpbuf, &sxp->st, 0) < 0 || !S_ISREG(sxp->st.st_mode))
  			continue;
  		switch (match_level) {
  		case 0:
  			best_match = j;
  			match_level = 1;
  			/* FALL THROUGH */
  		case 1:
  			if (!unchanged_file(cmpbuf, file, &sxp->st))
  				continue;
  			best_match = j;
  			match_level = 2;
  			/* FALL THROUGH */
  		case 2:
  			if (!unchanged_attrs(cmpbuf, file, sxp))
  				continue;
  			best_match = j;
  			match_level = 3;
  			break;
  		}
  		break;
  	} while (basis_dir[++j] != NULL);
  
  	if (!match_level)
  		return -1;
  
  	if (j != best_match) {
  		j = best_match;
  		pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
  		if (link_stat(cmpbuf, &sxp->st, 0) < 0)
  			return -1;
  	}
  
  	if (match_level == 3 && !copy_dest) {
  #ifdef SUPPORT_HARD_LINKS
  		if (link_dest) {
  			if (!hard_link_one(file, fname, cmpbuf, 1))
  				goto try_a_copy;
  			if (preserve_hard_links && F_IS_HLINKED(file))
  				finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, j);
  			if (!maybe_ATTRS_REPORT && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
  				itemize(cmpbuf, file, ndx, 1, sxp,
  					ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS,
  					0, "");
  			}
  		} else
  #endif
  		if (itemizing)
  			itemize(cmpbuf, file, ndx, 0, sxp, 0, 0, NULL);
  		if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT)
  			rprintf(FCLIENT, "%s is uptodate\n", fname);
  		return -2;
  	}
  
  	if (match_level >= 2) {
  #ifdef SUPPORT_HARD_LINKS
  	  try_a_copy: /* Copy the file locally. */
  #endif
  		if (!dry_run && copy_altdest_file(cmpbuf, fname, file) < 0)
  			return -1;
  		if (itemizing)
  			itemize(cmpbuf, file, ndx, 0, sxp, ITEM_LOCAL_CHANGE, 0, NULL);
  		if (maybe_ATTRS_REPORT
  		 && ((!itemizing && INFO_GTE(NAME, 1) && match_level == 2)
  		  || (INFO_GTE(NAME, 2) && match_level == 3))) {
  			code = match_level == 3 ? FCLIENT : FINFO;
  			rprintf(code, "%s%s\n", fname,
  				match_level == 3 ? " is uptodate" : "");
  		}
  #ifdef SUPPORT_HARD_LINKS
  		if (preserve_hard_links && F_IS_HLINKED(file))
  			finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, -1);
  #endif
  		return -2;
  	}
  
  	return FNAMECMP_BASIS_DIR_LOW + j;
  }
  
  /* This is only called for non-regular files.  We return -2 if we've finished
   * handling the file, or -1 if no dest-linking occurred, or a non-negative
   * value if we found an alternate basis file. */
  static int try_dests_non(struct file_struct *file, char *fname, int ndx,
  			 char *cmpbuf, stat_x *sxp, int itemizing,
  			 enum logcode code)
  {
  	int best_match = -1;
  	int match_level = 0;
  	enum nonregtype type;
  	uint32 *devp;
  #ifdef SUPPORT_LINKS
  	char lnk[MAXPATHLEN];
  	int len;
  #endif
  	int j = 0;
  
  #ifndef SUPPORT_LINKS
  	if (S_ISLNK(file->mode))
  		return -1;
  #endif
  	if (S_ISDIR(file->mode)) {
  		type = TYPE_DIR;
  	} else if (IS_SPECIAL(file->mode))
  		type = TYPE_SPECIAL;
  	else if (IS_DEVICE(file->mode))
  		type = TYPE_DEVICE;
  #ifdef SUPPORT_LINKS
  	else if (S_ISLNK(file->mode))
  		type = TYPE_SYMLINK;
  #endif
  	else {
  		rprintf(FERROR,
  			"internal: try_dests_non() called with invalid mode (%o)\n",
  			(int)file->mode);
  		exit_cleanup(RERR_UNSUPPORTED);
  	}
  
  	do {
  		pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
  		if (link_stat(cmpbuf, &sxp->st, 0) < 0)
  			continue;
  		switch (type) {
  		case TYPE_DIR:
  			if (!S_ISDIR(sxp->st.st_mode))
  				continue;
  			break;
  		case TYPE_SPECIAL:
  			if (!IS_SPECIAL(sxp->st.st_mode))
  				continue;
  			break;
  		case TYPE_DEVICE:
  			if (!IS_DEVICE(sxp->st.st_mode))
  				continue;
  			break;
  		case TYPE_SYMLINK:
  #ifdef SUPPORT_LINKS
  			if (!S_ISLNK(sxp->st.st_mode))
  				continue;
  			break;
  #else
  			return -1;
  #endif
  		}
  		if (match_level < 1) {
  			match_level = 1;
  			best_match = j;
  		}
  		switch (type) {
  		case TYPE_DIR:
  		case TYPE_SPECIAL:
  			break;
  		case TYPE_DEVICE:
  			devp = F_RDEV_P(file);
  			if (sxp->st.st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
  				continue;
  			break;
  		case TYPE_SYMLINK:
  #ifdef SUPPORT_LINKS
  			if ((len = do_readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0)
  				continue;
  			lnk[len] = '\0';
  			if (strcmp(lnk, F_SYMLINK(file)) != 0)
  				continue;
  			break;
  #else
  			return -1;
  #endif
  		}
  		if (match_level < 2) {
  			match_level = 2;
  			best_match = j;
  		}
  		if (unchanged_attrs(cmpbuf, file, sxp)) {
  			match_level = 3;
  			best_match = j;
  			break;
  		}
  	} while (basis_dir[++j] != NULL);
  
  	if (!match_level)
  		return -1;
  
  	if (j != best_match) {
  		j = best_match;
  		pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
  		if (link_stat(cmpbuf, &sxp->st, 0) < 0)
  			return -1;
  	}
  
  	if (match_level == 3) {
  #ifdef SUPPORT_HARD_LINKS
  		if (link_dest
  #ifndef CAN_HARDLINK_SYMLINK
  		 && !S_ISLNK(file->mode)
  #endif
  #ifndef CAN_HARDLINK_SPECIAL
  		 && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
  #endif
  		 && !S_ISDIR(file->mode)) {
  			if (do_link(cmpbuf, fname) < 0) {
  				rsyserr(FERROR_XFER, errno,
  					"failed to hard-link %s with %s",
  					cmpbuf, fname);
  				return j;
  			}
  			if (preserve_hard_links && F_IS_HLINKED(file))
  				finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
  		} else
  #endif
  			match_level = 2;
  		if (itemizing && stdout_format_has_i
  		 && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
  			int chg = compare_dest && type != TYPE_DIR ? 0
  			    : ITEM_LOCAL_CHANGE + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
  			char *lp = match_level == 3 ? "" : NULL;
  			itemize(cmpbuf, file, ndx, 0, sxp, chg + ITEM_MATCHED, 0, lp);
  		}
  		if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT) {
  			rprintf(FCLIENT, "%s%s is uptodate\n",
  				fname, type == TYPE_DIR ? "/" : "");
  		}
  		return -2;
  	}
  
  	return j;
  }
  
  static void list_file_entry(struct file_struct *f)
  {
  	char permbuf[PERMSTRING_SIZE];
  	int64 len;
  	int colwidth = human_readable ? 14 : 11;
  
  	if (!F_IS_ACTIVE(f)) {
  		/* this can happen if duplicate names were removed */
  		return;
  	}
  
  	permstring(permbuf, f->mode);
  	len = F_LENGTH(f);
  
  	/* TODO: indicate '+' if the entry has an ACL. */
  
  #ifdef SUPPORT_LINKS
  	if (preserve_links && S_ISLNK(f->mode)) {
  		rprintf(FINFO, "%s %*s %s %s -> %s\n",
  			permbuf, colwidth, human_num(len),
  			timestring(f->modtime), f_name(f, NULL),
  			F_SYMLINK(f));
  	} else
  #endif
  	if (missing_args == 2 && f->mode == 0) {
  		rprintf(FINFO, "%-*s %s\n",
  			colwidth + 31, "*missing",
  			f_name(f, NULL));
  	} else {
  		rprintf(FINFO, "%s %*s %s %s\n",
  			permbuf, colwidth, human_num(len),
  			timestring(f->modtime), f_name(f, NULL));
  	}
  }
  
  static int phase = 0;
  static int dflt_perms;
  
  static int implied_dirs_are_missing;
  /* Helper for recv_generator's skip_dir and dry_missing_dir tests. */
  static BOOL is_below(struct file_struct *file, struct file_struct *subtree)
  {
  	return F_DEPTH(file) > F_DEPTH(subtree)
  		&& (!implied_dirs_are_missing || f_name_has_prefix(file, subtree));
  }
  
  /* Acts on the indicated item in cur_flist whose name is fname.  If a dir,
   * make sure it exists, and has the right permissions/timestamp info.  For
   * all other non-regular files (symlinks, etc.) we create them here.  For
   * regular files that have changed, we try to find a basis file and then
   * start sending checksums.  The ndx is the file's unique index value.
   *
   * The fname parameter must point to a MAXPATHLEN buffer!  (e.g it gets
   * passed to delete_item(), which can use it during a recursive delete.)
   *
   * Note that f_out is set to -1 when doing final directory-permission and
   * modification-time repair. */
  static void recv_generator(char *fname, struct file_struct *file, int ndx,
  			   int itemizing, enum logcode code, int f_out)
  {
  	static const char *parent_dirname = "";
  	/* Missing dir not created due to --dry-run; will still be scanned. */
  	static struct file_struct *dry_missing_dir = NULL;
  	/* Missing dir whose contents are skipped altogether due to
  	 * --ignore-non-existing, daemon exclude, or mkdir failure. */
  	static struct file_struct *skip_dir = NULL;
  	static struct file_list *fuzzy_dirlist = NULL;
  	static int need_fuzzy_dirlist = 0;
  	struct file_struct *fuzzy_file = NULL;
  	int fd = -1, f_copy = -1;
  	stat_x sx, real_sx;
  	STRUCT_STAT partial_st;
  	struct file_struct *back_file = NULL;
  	int statret, real_ret, stat_errno;
  	char *fnamecmp, *partialptr, *backupptr = NULL;
  	char fnamecmpbuf[MAXPATHLEN];
  	uchar fnamecmp_type;
  	int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
  	int is_dir = !S_ISDIR(file->mode) ? 0
  		   : inc_recurse && ndx != cur_flist->ndx_start - 1 ? -1
  		   : 1;
  
  	if (DEBUG_GTE(GENR, 1))
  		rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
  
  	if (list_only) {
  		if (is_dir < 0
  		 || (is_dir && !implied_dirs && file->flags & FLAG_IMPLIED_DIR))
  			return;
  		list_file_entry(file);
  		return;
  	}
  
  	if (skip_dir) {
  		if (is_below(file, skip_dir)) {
  			if (is_dir)
  				file->flags |= FLAG_MISSING_DIR;
  #ifdef SUPPORT_HARD_LINKS
  			else if (F_IS_HLINKED(file))
  				handle_skipped_hlink(file, itemizing, code, f_out);
  #endif
  			return;
  		}
  		skip_dir = NULL;
  	}
  
  	init_stat_x(&sx);
  	if (daemon_filter_list.head && (*fname != '.' || fname[1])) {
  		if (check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
  			if (is_dir < 0)
  				return;
  #ifdef SUPPORT_HARD_LINKS
  			if (F_IS_HLINKED(file))
  				handle_skipped_hlink(file, itemizing, code, f_out);
  #endif
  			rprintf(FERROR_XFER,
  				"skipping daemon-excluded %s \"%s\"\n",
  				is_dir ? "directory" : "file", fname);
  			if (is_dir)
  				goto skipping_dir_contents;
  			return;
  		}
  	}
  
  	if (dry_run > 1 || (dry_missing_dir && is_below(file, dry_missing_dir))) {
  	  parent_is_dry_missing:
  		if (fuzzy_dirlist) {
  			flist_free(fuzzy_dirlist);
  			fuzzy_dirlist = NULL;
  		}
  		parent_dirname = "";
  		statret = -1;
  		stat_errno = ENOENT;
  	} else {
  		const char *dn = file->dirname ? file->dirname : ".";
  		dry_missing_dir = NULL;
  		if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
  			if (relative_paths && !implied_dirs
  			 && do_stat(dn, &sx.st) < 0) {
  				if (dry_run)
  					goto parent_is_dry_missing;
  				if (make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0) {
  					rsyserr(FERROR_XFER, errno,
  						"recv_generator: mkdir %s failed",
  						full_fname(dn));
  				}
  			}
  			if (fuzzy_dirlist) {
  				flist_free(fuzzy_dirlist);
  				fuzzy_dirlist = NULL;
  			}
  			if (fuzzy_basis)
  				need_fuzzy_dirlist = 1;
  #ifdef SUPPORT_ACLS
  			if (!preserve_perms)
  				dflt_perms = default_perms_for_dir(dn);
  #endif
  		}
  		parent_dirname = dn;
  
  		if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
  			strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
  			fuzzy_dirlist = get_dirlist(fnamecmpbuf, -1, GDL_IGNORE_FILTER_RULES);
  			need_fuzzy_dirlist = 0;
  		}
  
  		statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
  		stat_errno = errno;
  	}
  
  	if (missing_args == 2 && file->mode == 0) {
  		if (filter_list.head && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
  			return;
  		if (statret == 0)
  			delete_item(fname, sx.st.st_mode, del_opts);
  		return;
  	}
  
  	if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) {
  		if (is_dir) {
  			if (is_dir < 0)
  				return;
  			skip_dir = file;
  			file->flags |= FLAG_MISSING_DIR;
  		}
  #ifdef SUPPORT_HARD_LINKS
  		else if (F_IS_HLINKED(file))
  			handle_skipped_hlink(file, itemizing, code, f_out);
  #endif
  		if (INFO_GTE(SKIP, 1)) {
  			rprintf(FINFO, "not creating new %s \"%s\"\n",
  				is_dir ? "directory" : "file", fname);
  		}
  		return;
  	}
  
  	if (statret == 0 && !(sx.st.st_mode & S_IWUSR)
  	 && !am_root && sx.st.st_uid == our_uid)
  		del_opts |= DEL_NO_UID_WRITE;
  
  	if (ignore_existing > 0 && statret == 0
  	 && (!is_dir || !S_ISDIR(sx.st.st_mode))) {
  		if (INFO_GTE(SKIP, 1) && is_dir >= 0)
  			rprintf(FINFO, "%s exists\n", fname);
  #ifdef SUPPORT_HARD_LINKS
  		if (F_IS_HLINKED(file))
  			handle_skipped_hlink(file, itemizing, code, f_out);
  #endif
  		goto cleanup;
  	}
  
  	fnamecmp = fname;
  
  	if (is_dir) {
  		mode_t added_perms;
  		if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
  			goto cleanup;
  		if (am_root < 0) {
  			/* For --fake-super, the dir must be useable by the copying
  			 * user, just like it would be for root. */
  			added_perms = S_IRUSR|S_IWUSR|S_IXUSR;
  		} else
  			added_perms = 0;
  		if (is_dir < 0) {
  			/* In inc_recurse mode we want to make sure any missing
  			 * directories get created while we're still processing
  			 * the parent dir (which allows us to touch the parent
  			 * dir's mtime right away).  We will handle the dir in
  			 * full later (right before we handle its contents). */
  			if (statret == 0
  			 && (S_ISDIR(sx.st.st_mode)
  			  || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
  				goto cleanup; /* Any errors get reported later. */
  			if (do_mkdir(fname, (file->mode|added_perms) & 0700) == 0)
  				file->flags |= FLAG_DIR_CREATED;
  			goto cleanup;
  		}
  		/* The file to be received is a directory, so we need
  		 * to prepare appropriately.  If there is already a
  		 * file of that name and it is *not* a directory, then
  		 * we need to delete it.  If it doesn't exist, then
  		 * (perhaps recursively) create it. */
  		if (statret == 0 && !S_ISDIR(sx.st.st_mode)) {
  			if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)
  				goto skipping_dir_contents;
  			statret = -1;
  		}
  		if (dry_run && statret != 0) {
  			if (!dry_missing_dir)
  				dry_missing_dir = file;
  			file->flags |= FLAG_MISSING_DIR;
  		}
  		real_ret = statret;
  		real_sx = sx;
  		if (file->flags & FLAG_DIR_CREATED)
  			statret = -1;
  		if (!preserve_perms) { /* See comment in non-dir code below. */
  			file->mode = dest_mode(file->mode, sx.st.st_mode,
  					       dflt_perms, statret == 0);
  		}
  		if (statret != 0 && basis_dir[0] != NULL) {
  			int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
  					      itemizing, code);
  			if (j == -2) {
  				itemizing = 0;
  				code = FNONE;
  				statret = 1;
  			} else if (j >= 0) {
  				statret = 1;
  				fnamecmp = fnamecmpbuf;
  			}
  		}
  		if (itemizing && f_out != -1) {
  			itemize(fnamecmp, file, ndx, statret, &sx,
  				statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
  		}
  		if (real_ret != 0 && do_mkdir(fname,file->mode|added_perms) < 0 && errno != EEXIST) {
  			if (!relative_paths || errno != ENOENT
  			 || make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0
  			 || (do_mkdir(fname, file->mode|added_perms) < 0 && errno != EEXIST)) {
  				rsyserr(FERROR_XFER, errno,
  					"recv_generator: mkdir %s failed",
  					full_fname(fname));
  			  skipping_dir_contents:
  				rprintf(FERROR,
  				    "*** Skipping any contents from this failed directory ***\n");
  				skip_dir = file;
  				file->flags |= FLAG_MISSING_DIR;
  				goto cleanup;
  			}
  		}
  #ifdef SUPPORT_XATTRS
  		if (preserve_xattrs && statret == 1)
  			copy_xattrs(fnamecmpbuf, fname);
  #endif
  		if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
  		    && INFO_GTE(NAME, 1) && code != FNONE && f_out != -1)
  			rprintf(code, "%s/\n", fname);
  
  		/* We need to ensure that the dirs in the transfer have writable
  		 * permissions during the time we are putting files within them.
  		 * This is then fixed after the transfer is done. */
  #ifdef HAVE_CHMOD
  		if (!am_root && !(file->mode & S_IWUSR) && dir_tweaking) {
  			mode_t mode = file->mode | S_IWUSR;
  			if (do_chmod(fname, mode) < 0) {
  				rsyserr(FERROR_XFER, errno,
  					"failed to modify permissions on %s",
  					full_fname(fname));
  			}
  			need_retouch_dir_perms = 1;
  		}
  #endif
  
  		if (real_ret != 0 && one_file_system)
  			real_sx.st.st_dev = filesystem_dev;
  		if (inc_recurse) {
  			if (one_file_system) {
  				uint32 *devp = F_DIR_DEV_P(file);
  				DEV_MAJOR(devp) = major(real_sx.st.st_dev);
  				DEV_MINOR(devp) = minor(real_sx.st.st_dev);
  			}
  		}
  		else if (delete_during && f_out != -1 && !phase
  		    && !(file->flags & FLAG_MISSING_DIR)) {
  			if (file->flags & FLAG_CONTENT_DIR)
  				delete_in_dir(fname, file, &real_sx.st.st_dev);
  			else
  				change_local_filter_dir(fname, strlen(fname), F_DEPTH(file));
  		}
  		goto cleanup;
  	}
  
  	/* If we're not preserving permissions, change the file-list's
  	 * mode based on the local permissions and some heuristics. */
  	if (!preserve_perms) {
  		int exists = statret == 0 && !S_ISDIR(sx.st.st_mode);
  		file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms,
  				       exists);
  	}
  
  #ifdef SUPPORT_HARD_LINKS
  	if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
  	 && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
  		goto cleanup;
  #endif
  
  	if (preserve_links && S_ISLNK(file->mode)) {
  #ifdef SUPPORT_LINKS
  		const char *sl = F_SYMLINK(file);
  		if (safe_symlinks && unsafe_symlink(sl, fname)) {
  			if (INFO_GTE(NAME, 1)) {
  				if (solo_file) {
  					/* fname contains the destination path, but we
  					 * want to report the source path. */
  					fname = f_name(file, NULL);
  				}
  				rprintf(FINFO,
  					"ignoring unsafe symlink \"%s\" -> \"%s\"\n",
  					fname, sl);
  			}
  			return;
  		}
  		if (statret == 0) {
  			char lnk[MAXPATHLEN];
  			int len;
  
  			if (S_ISLNK(sx.st.st_mode)
  			 && (len = do_readlink(fname, lnk, MAXPATHLEN-1)) > 0
  			 && strncmp(lnk, sl, len) == 0 && sl[len] == '\0') {
  				/* The link is pointing to the right place. */
  				set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
  				if (itemizing)
  					itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
  #if defined SUPPORT_HARD_LINKS && defined CAN_HARDLINK_SYMLINK
  				if (preserve_hard_links && F_IS_HLINKED(file))
  					finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
  #endif
  				if (remove_source_files == 1)
  					goto return_with_success;
  				goto cleanup;
  			}
  		} else if (basis_dir[0] != NULL) {
  			int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
  					      itemizing, code);
  			if (j == -2) {
  #ifndef CAN_HARDLINK_SYMLINK
  				if (link_dest) {
  					/* Resort to --copy-dest behavior. */
  				} else
  #endif
  				if (!copy_dest)
  					goto cleanup;
  				itemizing = 0;
  				code = FNONE;
  			} else if (j >= 0)
  				statret = 1;
  		}
  		if (atomic_create(file, fname, sl, MAKEDEV(0, 0), &sx, statret == 0 ? DEL_FOR_SYMLINK : 0)) {
  			set_file_attrs(fname, file, NULL, NULL, 0);
  			if (itemizing) {
  				if (statret == 0 && !S_ISLNK(sx.st.st_mode))
  					statret = -1;
  				itemize(fname, file, ndx, statret, &sx,
  					ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
  			}
  			if (code != FNONE && INFO_GTE(NAME, 1))
  				rprintf(code, "%s -> %s\n", fname, sl);
  #ifdef SUPPORT_HARD_LINKS
  			if (preserve_hard_links && F_IS_HLINKED(file))
  				finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
  #endif
  			/* This does not check remove_source_files == 1
  			 * because this is one of the items that the old
  			 * --remove-sent-files option would remove. */
  			if (remove_source_files)
  				goto return_with_success;
  		}
  #endif
  		goto cleanup;
  	}
  
  	if ((am_root && preserve_devices && IS_DEVICE(file->mode))
  	 || (preserve_specials && IS_SPECIAL(file->mode))) {
  		dev_t rdev;
  		int del_for_flag = 0;
  		if (IS_DEVICE(file->mode)) {
  			uint32 *devp = F_RDEV_P(file);
  			rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
  		} else
  			rdev = 0;
  		if (statret == 0) {
  			if (IS_DEVICE(file->mode)) {
  				if (!IS_DEVICE(sx.st.st_mode))
  					statret = -1;
  				del_for_flag = DEL_FOR_DEVICE;
  			} else {
  				if (!IS_SPECIAL(sx.st.st_mode))
  					statret = -1;
  				del_for_flag = DEL_FOR_SPECIAL;
  			}
  			if (statret == 0
  			 && BITS_EQUAL(sx.st.st_mode, file->mode, _S_IFMT)
  			 && (IS_SPECIAL(sx.st.st_mode) || sx.st.st_rdev == rdev)) {
  				/* The device or special file is identical. */
  				set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
  				if (itemizing)
  					itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
  #ifdef SUPPORT_HARD_LINKS
  				if (preserve_hard_links && F_IS_HLINKED(file))
  					finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
  #endif
  				if (remove_source_files == 1)
  					goto return_with_success;
  				goto cleanup;
  			}
  		} else if (basis_dir[0] != NULL) {
  			int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
  					      itemizing, code);
  			if (j == -2) {
  #ifndef CAN_HARDLINK_SPECIAL
  				if (link_dest) {
  					/* Resort to --copy-dest behavior. */
  				} else
  #endif
  				if (!copy_dest)
  					goto cleanup;
  				itemizing = 0;
  				code = FNONE;
  			} else if (j >= 0)
  				statret = 1;
  		}
  		if (DEBUG_GTE(GENR, 1)) {
  			rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
  				fname, (int)file->mode,
  				(long)major(rdev), (long)minor(rdev));
  		}
  		if (atomic_create(file, fname, NULL, rdev, &sx, del_for_flag)) {
  			set_file_attrs(fname, file, NULL, NULL, 0);
  			if (itemizing) {
  				itemize(fname, file, ndx, statret, &sx,
  					ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
  			}
  			if (code != FNONE && INFO_GTE(NAME, 1))
  				rprintf(code, "%s\n", fname);
  #ifdef SUPPORT_HARD_LINKS
  			if (preserve_hard_links && F_IS_HLINKED(file))
  				finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
  #endif
  			if (remove_source_files == 1)
  				goto return_with_success;
  		}
  		goto cleanup;
  	}
  
  	if (!S_ISREG(file->mode)) {
  		if (solo_file)
  			fname = f_name(file, NULL);
  		rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
  		goto cleanup;
  	}
  
  	if (max_size > 0 && F_LENGTH(file) > max_size) {
  		if (INFO_GTE(SKIP, 1)) {
  			if (solo_file)
  				fname = f_name(file, NULL);
  			rprintf(FINFO, "%s is over max-size\n", fname);
  		}
  		goto cleanup;
  	}
  	if (min_size > 0 && F_LENGTH(file) < min_size) {
  		if (INFO_GTE(SKIP, 1)) {
  			if (solo_file)
  				fname = f_name(file, NULL);
  			rprintf(FINFO, "%s is under min-size\n", fname);
  		}
  		goto cleanup;
  	}
  
  	if (update_only > 0 && statret == 0
  	    && cmp_time(sx.st.st_mtime, file->modtime) > 0) {
  		if (INFO_GTE(SKIP, 1))
  			rprintf(FINFO, "%s is newer\n", fname);
  #ifdef SUPPORT_HARD_LINKS
  		if (F_IS_HLINKED(file))
  			handle_skipped_hlink(file, itemizing, code, f_out);
  #endif
  		goto cleanup;
  	}
  
  	fnamecmp_type = FNAMECMP_FNAME;
  
  	if (statret == 0 && !S_ISREG(sx.st.st_mode)) {
  		if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
  			goto cleanup;
  		statret = -1;
  		stat_errno = ENOENT;
  	}
  
  	if (statret != 0 && basis_dir[0] != NULL) {
  		int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx,
  				      itemizing, code);
  		if (j == -2) {
  			if (remove_source_files == 1)
  				goto return_with_success;
  			goto cleanup;
  		}
  		if (j >= 0) {
  			fnamecmp = fnamecmpbuf;
  			fnamecmp_type = j;
  			statret = 0;
  		}
  	}
  
  	real_ret = statret;
  	real_sx = sx;
  
  	if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
  	    && link_stat(partialptr, &partial_st, 0) == 0
  	    && S_ISREG(partial_st.st_mode)) {
  		if (statret != 0)
  			goto prepare_to_open;
  	} else
  		partialptr = NULL;
  
  	if (statret != 0 && fuzzy_dirlist) {
  		int j = find_fuzzy(file, fuzzy_dirlist);
  		if (j >= 0) {
  			fuzzy_file = fuzzy_dirlist->files[j];
  			f_name(fuzzy_file, fnamecmpbuf);
  			if (DEBUG_GTE(FUZZY, 1)) {
  				rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
  					fname, fnamecmpbuf);
  			}
  			sx.st.st_size = F_LENGTH(fuzzy_file);
  			statret = 0;
  			fnamecmp = fnamecmpbuf;
  			fnamecmp_type = FNAMECMP_FUZZY;
  		}
  	}
  
  	if (statret != 0) {
  #ifdef SUPPORT_HARD_LINKS
  		if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
  			cur_flist->in_progress++;
  			goto cleanup;
  		}
  #endif
  		if (stat_errno == ENOENT)
  			goto notify_others;
  		rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s",
  			full_fname(fname));
  		goto cleanup;
  	}
  
  	if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
  		;
  	else if (fnamecmp_type == FNAMECMP_FUZZY)
  		;
  	else if (unchanged_file(fnamecmp, file, &sx.st)) {
  		if (partialptr) {
  			do_unlink(partialptr);
  			handle_partial_dir(partialptr, PDIR_DELETE);
  		}
  		set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
  		if (itemizing)
  			itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
  #ifdef SUPPORT_HARD_LINKS
  		if (preserve_hard_links && F_IS_HLINKED(file))
  			finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
  #endif
  		if (remove_source_files != 1)
  			goto cleanup;
  	  return_with_success:
  		if (!dry_run)
  			send_msg_int(MSG_SUCCESS, ndx);
  		goto cleanup;
  	}
  
  	if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file)) {
  #ifdef SUPPORT_HARD_LINKS
  		if (F_IS_HLINKED(file))
  			handle_skipped_hlink(file, itemizing, code, f_out);
  #endif
  		goto cleanup;
  	}
  
    prepare_to_open:
  	if (partialptr) {
  		sx.st = partial_st;
  		fnamecmp = partialptr;
  		fnamecmp_type = FNAMECMP_PARTIAL_DIR;
  		statret = 0;
  	}
  
  	if (!do_xfers)
  		goto notify_others;
  
  	if (read_batch || whole_file) {
  		if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
  			if (!(backupptr = get_backup_name(fname)))
  				goto cleanup;
  			if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
  				goto pretend_missing;
  			if (copy_file(fname, backupptr, -1, back_file->mode) < 0) {
  				unmake_file(back_file);
  				back_file = NULL;
  				goto cleanup;
  			}
  		}
  		goto notify_others;
  	}
  
  	if (fuzzy_dirlist) {
  		int j = flist_find(fuzzy_dirlist, file);
  		if (j >= 0) /* don't use changing file as future fuzzy basis */
  			fuzzy_dirlist->files[j]->flags |= FLAG_FILE_SENT;
  	}
  
  	/* open the file */
  	if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
  		rsyserr(FERROR, errno, "failed to open %s, continuing",
  			full_fname(fnamecmp));
  	  pretend_missing:
  		/* pretend the file didn't exist */
  #ifdef SUPPORT_HARD_LINKS
  		if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
  			cur_flist->in_progress++;
  			goto cleanup;
  		}
  #endif
  		statret = real_ret = -1;
  		goto notify_others;
  	}
  
  	if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
  		if (!(backupptr = get_backup_name(fname))) {
  			close(fd);
  			goto cleanup;
  		}
  		if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
  			close(fd);
  			goto pretend_missing;
  		}
  		if (robust_unlink(backupptr) && errno != ENOENT) {
  			rsyserr(FERROR_XFER, errno, "unlink %s",
  				full_fname(backupptr));
  			unmake_file(back_file);
  			back_file = NULL;
  			close(fd);
  			goto cleanup;
  		}
  		if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
  			rsyserr(FERROR_XFER, errno, "open %s", full_fname(backupptr));
  			unmake_file(back_file);
  			back_file = NULL;
  			close(fd);
  			goto cleanup;
  		}
  		fnamecmp_type = FNAMECMP_BACKUP;
  	}
  
  	if (DEBUG_GTE(DELTASUM, 3)) {
  		rprintf(FINFO, "gen mapped %s of size %s\n",
  			fnamecmp, big_num(sx.st.st_size));
  	}
  
  	if (DEBUG_GTE(DELTASUM, 2))
  		rprintf(FINFO, "generating and sending sums for %d\n", ndx);
  
    notify_others:
  	if (remove_source_files && !delay_updates && !phase && !dry_run)
  		increment_active_files(ndx, itemizing, code);
  	if (inc_recurse && !dry_run)
  		cur_flist->in_progress++;
  #ifdef SUPPORT_HARD_LINKS
  	if (preserve_hard_links && F_IS_HLINKED(file))
  		file->flags |= FLAG_FILE_SENT;
  #endif
  	write_ndx(f_out, ndx);
  	if (itemizing) {
  		int iflags = ITEM_TRANSFER;
  		if (always_checksum > 0)
  			iflags |= ITEM_REPORT_CHANGE;
  		if (fnamecmp_type != FNAMECMP_FNAME)
  			iflags |= ITEM_BASIS_TYPE_FOLLOWS;
  		if (fnamecmp_type == FNAMECMP_FUZZY)
  			iflags |= ITEM_XNAME_FOLLOWS;
  		itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
  			fuzzy_file ? fuzzy_file->basename : NULL);
  #ifdef SUPPORT_ACLS
  		if (preserve_acls)
  			free_acl(&real_sx);
  #endif
  #ifdef SUPPORT_XATTRS
  		if (preserve_xattrs)
  			free_xattr(&real_sx);
  #endif
  	}
  
  	if (!do_xfers) {
  #ifdef SUPPORT_HARD_LINKS
  		if (preserve_hard_links && F_IS_HLINKED(file))
  			finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
  #endif
  		goto cleanup;
  	}
  	if (read_batch)
  		goto cleanup;
  
  	if (statret != 0 || whole_file)
  		write_sum_head(f_out, NULL);
  	else if (sx.st.st_size <= 0) {
  		write_sum_head(f_out, NULL);
  		close(fd);
  	} else {
  		if (generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy) < 0) {
  			rprintf(FWARNING,
  			    "WARNING: file is too large for checksum sending: %s\n",
  			    fnamecmp);
  			write_sum_head(f_out, NULL);
  		}
  		close(fd);
  	}
  
    cleanup:
  	if (back_file) {
  		int save_preserve_xattrs = preserve_xattrs;
  		if (f_copy >= 0)
  			close(f_copy);
  #ifdef SUPPORT_XATTRS
  		if (preserve_xattrs) {
  			copy_xattrs(fname, backupptr);
  			preserve_xattrs = 0;
  		}
  #endif
  		set_file_attrs(backupptr, back_file, NULL, NULL, 0);
  		preserve_xattrs = save_preserve_xattrs;
  		if (INFO_GTE(BACKUP, 1)) {
  			rprintf(FINFO, "backed up %s to %s\n",
  				fname, backupptr);
  		}
  		unmake_file(back_file);
  	}
  
  #ifdef SUPPORT_ACLS
  	if (preserve_acls)
  		free_acl(&sx);
  #endif
  #ifdef SUPPORT_XATTRS
  	if (preserve_xattrs)
  		free_xattr(&sx);
  #endif
  	return;
  }
  
  /* If we are replacing an existing hard link, symlink, device, or special file,
   * create a temp-name item and rename it into place.  Only a symlink or hard
   * link puts a non-NULL value into the lnk arg.  Only a device puts a non-0
   * value into the rdev arg.  Specify 0 for the del_for_flag if there is not a
   * file to replace.  This returns 1 on success and 0 on failure. */
  int atomic_create(struct file_struct *file, char *fname, const char *lnk,
  		  dev_t rdev, stat_x *sxp, int del_for_flag)
  {
  	char tmpname[MAXPATHLEN];
  	const char *create_name;
  	int skip_atomic, dir_in_the_way = del_for_flag && S_ISDIR(sxp->st.st_mode);
  
  	if (!del_for_flag || dir_in_the_way || tmpdir || !get_tmpname(tmpname, fname, True))
  		skip_atomic = 1;
  	else
  		skip_atomic = 0;
  
  	if (del_for_flag) {
  		if (make_backups > 0 && !dir_in_the_way) {
  			if (!make_backup(fname, skip_atomic))
  				return 0;
  		} else if (skip_atomic) {
  			int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
  			if (delete_item(fname, sxp->st.st_mode, del_opts | del_for_flag) != 0)
  				return 0;
  		}
  	}
  
  	create_name = skip_atomic ? fname : tmpname;
  
  	if (lnk) {
  #ifdef SUPPORT_LINKS
  		if (S_ISLNK(file->mode)
  #ifdef SUPPORT_HARD_LINKS /* The first symlink in a hard-linked cluster is always created. */
  		 && (!F_IS_HLINKED(file) || file->flags & FLAG_HLINK_FIRST)
  #endif
  		 ) {
  			if (do_symlink(lnk, create_name) < 0) {
  				rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
  					full_fname(create_name), lnk);
  				return 0;
  			}
  		} else
  #endif
  #ifdef SUPPORT_HARD_LINKS
  		if (!hard_link_one(file, create_name, lnk, 0))
  			return 0;
  #endif
  	} else {
  		if (do_mknod(create_name, file->mode, rdev) < 0) {
  			rsyserr(FERROR_XFER, errno, "mknod %s failed",
  				full_fname(create_name));
  			return 0;
  		}
  	}
  
  	if (!skip_atomic) {
  		if (do_rename(tmpname, fname) < 0) {
  			rsyserr(FERROR_XFER, errno, "rename %s -> \"%s\" failed",
  				full_fname(tmpname), full_fname(fname));
  			do_unlink(tmpname);
  			return 0;
  		}
  	}
  
  	return 1;
  }
  
  #ifdef SUPPORT_HARD_LINKS
  static void handle_skipped_hlink(struct file_struct *file, int itemizing,
  				 enum logcode code, int f_out)
  {
  	char fbuf[MAXPATHLEN];
  	int new_last_ndx;
  	struct file_list *save_flist = cur_flist;
  
  	/* If we skip the last item in a chain of links and there was a
  	 * prior non-skipped hard-link waiting to finish, finish it now. */
  	if ((new_last_ndx = skip_hard_link(file, &cur_flist)) < 0)
  		return;
  
  	file = cur_flist->files[new_last_ndx - cur_flist->ndx_start];
  	cur_flist->in_progress--; /* undo prior increment */
  	f_name(file, fbuf);
  	recv_generator(fbuf, file, new_last_ndx, itemizing, code, f_out);
  
  	cur_flist = save_flist;
  }
  #endif
  
  static void touch_up_dirs(struct file_list *flist, int ndx)
  {
  	static int counter = 0;
  	struct file_struct *file;
  	char *fname;
  	BOOL fix_dir_perms;
  	int i, start, end;
  
  	if (ndx < 0) {
  		start = 0;
  		end = flist->used - 1;
  	} else
  		start = end = ndx;
  
  	/* Fix any directory permissions that were modified during the
  	 * transfer and/or re-set any tweaked modified-time values. */
  	for (i = start; i <= end; i++, counter++) {
  		file = flist->files[i];
  		if (!S_ISDIR(file->mode)
  		 || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
  			continue;
  		if (DEBUG_GTE(TIME, 2)) {
  			fname = f_name(file, NULL);
  			rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
  				NS(fname), i);
  		}
  		/* Be sure not to retouch permissions with --fake-super. */
  		fix_dir_perms = !am_root && !(file->mode & S_IWUSR);
  		if (!F_IS_ACTIVE(file) || file->flags & FLAG_MISSING_DIR
  		 || !(need_retouch_dir_times || fix_dir_perms))
  			continue;
  		fname = f_name(file, NULL);
  		if (fix_dir_perms)
  			do_chmod(fname, file->mode);
  		if (need_retouch_dir_times) {
  			STRUCT_STAT st;
  			if (link_stat(fname, &st, 0) == 0
  			 && cmp_time(st.st_mtime, file->modtime) != 0)
  				set_modtime(fname, file->modtime, F_MOD_NSEC(file), file->mode);
  		}
  		if (counter >= loopchk_limit) {
  			if (allowed_lull)
  				maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
  			else
  				maybe_flush_socket(0);
  			counter = 0;
  		}
  	}
  }
  
  void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
  {
  	struct file_struct *file;
  	struct file_list *flist;
  	char fbuf[MAXPATHLEN];
  	int ndx;
  
  	while (1) {
  #ifdef SUPPORT_HARD_LINKS
  		if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
  			flist = flist_for_ndx(ndx, "check_for_finished_files.1");
  			file = flist->files[ndx - flist->ndx_start];
  			assert(file->flags & FLAG_HLINKED);
  			finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
  			flist->in_progress--;
  			continue;
  		}
  #endif
  
  		if (check_redo && (ndx = get_redo_num()) != -1) {
  			csum_length = SUM_LENGTH;
  			max_size = -max_size;
  			min_size = -min_size;
  			ignore_existing = -ignore_existing;
  			ignore_non_existing = -ignore_non_existing;
  			update_only = -update_only;
  			always_checksum = -always_checksum;
  			size_only = -size_only;
  			append_mode = -append_mode;
  			make_backups = -make_backups; /* avoid dup backup w/inplace */
  			ignore_times++;
  
  			flist = cur_flist;
  			cur_flist = flist_for_ndx(ndx, "check_for_finished_files.2");
  
  			file = cur_flist->files[ndx - cur_flist->ndx_start];
  			if (solo_file)
  				strlcpy(fbuf, solo_file, sizeof fbuf);
  			else
  				f_name(file, fbuf);
  			recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
  			cur_flist->to_redo--;
  
  			cur_flist = flist;
  
  			csum_length = SHORT_SUM_LENGTH;
  			max_size = -max_size;
  			min_size = -min_size;
  			ignore_existing = -ignore_existing;
  			ignore_non_existing = -ignore_non_existing;
  			update_only = -update_only;
  			always_checksum = -always_checksum;
  			size_only = -size_only;
  			append_mode = -append_mode;
  			make_backups = -make_backups;
  			ignore_times--;
  			continue;
  		}
  
  		if (cur_flist == first_flist)
  			break;
  
  		/* We only get here if inc_recurse is enabled. */
  		if (first_flist->in_progress || first_flist->to_redo)
  			break;
  
  		write_ndx(sock_f_out, NDX_DONE);
  		if (!read_batch && !flist_eof) {
  			int old_total = 0;
  			for (flist = first_flist; flist != cur_flist; flist = flist->next)
  				old_total += flist->used;
  			maybe_flush_socket(!flist_eof && file_total - old_total < MIN_FILECNT_LOOKAHEAD/2);
  		}
  
  		if (delete_during == 2 || !dir_tweaking) {
  			/* Skip directory touch-up. */
  		} else if (first_flist->parent_ndx >= 0)
  			touch_up_dirs(dir_flist, first_flist->parent_ndx);
  
  		flist_free(first_flist); /* updates first_flist */
  	}
  }
  
  void generate_files(int f_out, const char *local_name)
  {
  	int i, ndx, next_loopchk = 0;
  	char fbuf[MAXPATHLEN];
  	int itemizing;
  	enum logcode code;
  	int save_info_flist = info_levels[INFO_FLIST];
  	int save_info_progress = info_levels[INFO_PROGRESS];
  
  	if (protocol_version >= 29) {
  		itemizing = 1;
  		maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
  		code = logfile_format_has_i ? FNONE : FLOG;
  	} else if (am_daemon) {
  		itemizing = logfile_format_has_i && do_xfers;
  		maybe_ATTRS_REPORT = ATTRS_REPORT;
  		code = itemizing || !do_xfers ? FCLIENT : FINFO;
  	} else if (!am_server) {
  		itemizing = stdout_format_has_i;
  		maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
  		code = itemizing ? FNONE : FINFO;
  	} else {
  		itemizing = 0;
  		maybe_ATTRS_REPORT = ATTRS_REPORT;
  		code = FINFO;
  	}
  	solo_file = local_name;
  	dir_tweaking = !(list_only || solo_file || dry_run);
  	need_retouch_dir_times = preserve_times & PRESERVE_DIR_TIMES;
  	loopchk_limit = allowed_lull ? allowed_lull * 5 : 200;
  	symlink_timeset_failed_flags = ITEM_REPORT_TIME
  	    | (protocol_version >= 30 || !am_server ? ITEM_REPORT_TIMEFAIL : 0);
  	implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
  
  	if (DEBUG_GTE(GENR, 1))
  		rprintf(FINFO, "generator starting pid=%ld\n", (long)getpid());
  
  	if (delete_before && !solo_file && cur_flist->used > 0)
  		do_delete_pass();
  	if (delete_during == 2) {
  		deldelay_size = BIGPATHBUFLEN * 4;
  		deldelay_buf = new_array(char, deldelay_size);
  		if (!deldelay_buf)
  			out_of_memory("delete-delay");
  	}
  	info_levels[INFO_FLIST] = info_levels[INFO_PROGRESS] = 0;
  
  	if (append_mode > 0 || whole_file < 0)
  		whole_file = 0;
  	if (DEBUG_GTE(FLIST, 1)) {
  		rprintf(FINFO, "delta-transmission %s\n",
  			whole_file
  			? "disabled for local transfer or --whole-file"
  			: "enabled");
  	}
  
  	dflt_perms = (ACCESSPERMS & ~orig_umask);
  
  	do {
  #ifdef SUPPORT_HARD_LINKS
  		if (preserve_hard_links && inc_recurse) {
  			while (!flist_eof && file_total < MIN_FILECNT_LOOKAHEAD/2)
  				wait_for_receiver();
  		}
  #endif
  
  		if (inc_recurse && cur_flist->parent_ndx >= 0) {
  			struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
  			if (solo_file)
  				strlcpy(fbuf, solo_file, sizeof fbuf);
  			else
  				f_name(fp, fbuf);
  			ndx = cur_flist->ndx_start - 1;
  			recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
  			if (delete_during && dry_run < 2 && !list_only
  			 && !(fp->flags & FLAG_MISSING_DIR)) {
  				if (fp->flags & FLAG_CONTENT_DIR) {
  					dev_t dirdev;
  					if (one_file_system) {
  						uint32 *devp = F_DIR_DEV_P(fp);
  						dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
  					} else
  						dirdev = MAKEDEV(0, 0);
  					delete_in_dir(fbuf, fp, &dirdev);
  				} else
  					change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(fp));
  			}
  		}
  		for (i = cur_flist->low; i <= cur_flist->high; i++) {
  			struct file_struct *file = cur_flist->sorted[i];
  
  			if (!F_IS_ACTIVE(file))
  				continue;
  
  			if (unsort_ndx)
  				ndx = F_NDX(file);
  			else
  				ndx = i + cur_flist->ndx_start;
  
  			if (solo_file)
  				strlcpy(fbuf, solo_file, sizeof fbuf);
  			else
  				f_name(file, fbuf);
  			recv_generator(fbuf, file, ndx, itemizing, code, f_out);
  
  			check_for_finished_files(itemizing, code, 0);
  
  			if (i + cur_flist->ndx_start >= next_loopchk) {
  				if (allowed_lull)
  					maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
  				else
  					maybe_flush_socket(0);
  				next_loopchk += loopchk_limit;
  			}
  		}
  
  		if (!inc_recurse) {
  			write_ndx(f_out, NDX_DONE);
  			break;
  		}
  
  		while (1) {
  			check_for_finished_files(itemizing, code, 1);
  			if (cur_flist->next || flist_eof)
  				break;
  			wait_for_receiver();
  		}
  	} while ((cur_flist = cur_flist->next) != NULL);
  
  	if (delete_during)
  		delete_in_dir(NULL, NULL, &dev_zero);
  	phase++;
  	if (DEBUG_GTE(GENR, 1))
  		rprintf(FINFO, "generate_files phase=%d\n", phase);
  
  	while (1) {
  		check_for_finished_files(itemizing, code, 1);
  		if (msgdone_cnt)
  			break;
  		wait_for_receiver();
  	}
  
  	phase++;
  	if (DEBUG_GTE(GENR, 1))
  		rprintf(FINFO, "generate_files phase=%d\n", phase);
  
  	write_ndx(f_out, NDX_DONE);
  
  	/* Reduce round-trip lag-time for a useless delay-updates phase. */
  	if (protocol_version >= 29 && EARLY_DELAY_DONE_MSG())
  		write_ndx(f_out, NDX_DONE);
  
  	if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG()) {
  		if ((INFO_GTE(STATS, 2) && (delete_mode || force_delete)) || read_batch)
  			write_del_stats(f_out);
  		if (EARLY_DELAY_DONE_MSG()) /* Can't send this before delay */
  			write_ndx(f_out, NDX_DONE);
  	}
  
  	/* Read MSG_DONE for the redo phase (and any prior messages). */
  	while (1) {
  		check_for_finished_files(itemizing, code, 0);
  		if (msgdone_cnt > 1)
  			break;
  		wait_for_receiver();
  	}
  
  	if (protocol_version >= 29) {
  		phase++;
  		if (DEBUG_GTE(GENR, 1))
  			rprintf(FINFO, "generate_files phase=%d\n", phase);
  		if (!EARLY_DELAY_DONE_MSG()) {
  			write_ndx(f_out, NDX_DONE);
  			if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG())
  				write_ndx(f_out, NDX_DONE);
  		}
  		/* Read MSG_DONE for delay-updates phase & prior messages. */
  		while (msgdone_cnt == 2)
  			wait_for_receiver();
  	}
  
  	info_levels[INFO_FLIST] = save_info_flist;
  	info_levels[INFO_PROGRESS] = save_info_progress;
  
  	if (delete_during == 2)
  		do_delayed_deletions(fbuf);
  	if (delete_after && !solo_file && file_total > 0)
  		do_delete_pass();
  
  	if (max_delete >= 0 && skipped_deletes) {
  		rprintf(FWARNING,
  			"Deletions stopped due to --max-delete limit (%d skipped)\n",
  			skipped_deletes);
  		io_error |= IOERR_DEL_LIMIT;
  	}
  
  	if (protocol_version >= 31) {
  		if (!EARLY_DELETE_DONE_MSG()) {
  			if (INFO_GTE(STATS, 2) || read_batch)
  				write_del_stats(f_out);
  			write_ndx(f_out, NDX_DONE);
  		}
  
  		/* Read MSG_DONE for late-delete phase & prior messages. */
  		while (msgdone_cnt == 3)
  			wait_for_receiver();
  	}
  
  	if ((need_retouch_dir_perms || need_retouch_dir_times)
  	 && dir_tweaking && (!inc_recurse || delete_during == 2))
  		touch_up_dirs(dir_flist, -1);
  
  	if (DEBUG_GTE(GENR, 1))
  		rprintf(FINFO, "generate_files finished\n");
  }
  