generator.c

Rsync 3.0.5 source code

		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) < 0) {
		if (verbose) {
			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 && (verbose > 1 || 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 (verbose > 1 && 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 && verbose && match_level == 2)
		  || (verbose > 1 && 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)
{
	char lnk[MAXPATHLEN];
	int best_match = -1;
	int match_level = 0;
	enum nonregtype type;
	uint32 *devp;
	int len, 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;
#ifdef SUPPORT_LINKS
		case TYPE_SYMLINK:
			if (!S_ISLNK(sxp->st.st_mode))
				continue;
			break;
#endif
		}
		if (match_level < 1) {
			match_level = 1;
			best_match = j;
		}
		switch (type) {
		case TYPE_DIR:
			break;
		case TYPE_SPECIAL:
		case TYPE_DEVICE:
			devp = F_RDEV_P(file);
			if (sxp->st.st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
				continue;
			break;
#ifdef SUPPORT_LINKS
		case TYPE_SYMLINK:
			if ((len = readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0)
				continue;
			lnk[len] = '\0';
			if (strcmp(lnk, F_SYMLINK(file)) != 0)
				continue;
			break;
#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
		 && (verbose > 1 || 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 (verbose > 1 && 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];
	double len;

	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 %11.0f %s %s -> %s\n",
			permbuf, len, timestring(f->modtime),
			f_name(f, NULL), F_SYMLINK(f));
	} else
#endif
	{
		rprintf(FINFO, "%s %11.0f %s %s\n",
			permbuf, 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 (verbose > 2)
		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;
	}

	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;
		}
	}

#ifdef SUPPORT_ACLS
	sx.acc_acl = sx.def_acl = NULL;
#endif
#ifdef SUPPORT_XATTRS
	sx.xattr = NULL;
#endif
	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 (create_directory_path(fname) < 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, 1);
			need_fuzzy_dirlist = 0;
		}

		statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
		stat_errno = errno;
	}

	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 (verbose > 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 (verbose > 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;
	}

	if (is_dir) {
		if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
			goto cleanup;
		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). */