rem: if (backup_dir[strlen(backup_dir) - 1] == '/') backup_dir[strlen(backup_dir) - 1] = 0;
add: if (backup_dir_len && backup_dir[backup_dir_len - 1] == '/') backup_dir[--backup_dir_len] = '\0';
context: static int keep_backup(char *fname){	static int initialised;	char keep_name [MAXPATHLEN];	STRUCT_STAT st;	struct file_struct *file;	int kept = 0;	int ret_code;	if (!initialised) {		if (backup_dir[strlen(backup_dir) - 1] == '/')			backup_dir[strlen(backup_dir) - 1] = 0;		if (verbose > 0)			rprintf (FINFO, "backup_dir is %s\n", backup_dir);		initialised = 1;	}	/* return if no file to keep */#if SUPPORT_LINKS	if (do_lstat (fname, &st)) return 1;#else	if (do_stat (fname, &st)) return 1;#endif	file = make_file(fname, NULL, NO_EXCLUDES);	/* the file could have disappeared */	if (!file) return 1;	/* make a complete pathname for backup file */	if (strlen(backup_dir) + strlen(fname) +		(suffix_specified ? strlen(backup_suffix) : 0) > (MAXPATHLEN - 1)) {		rprintf (FERROR, "keep_backup filename too long\n");		return 0;	}	if (suffix_specified) {		snprintf(keep_name, sizeof (keep_name), "%s/%s%s",		    backup_dir, fname, backup_suffix);	} else {		snprintf(keep_name, sizeof (keep_name), "%s/%s",		    backup_dir, fname);	}#ifdef HAVE_MKNOD	/* Check to see if this is a device file, or link */	if(IS_DEVICE(file->mode)) {		if(am_root && preserve_devices) {			make_bak_dir(fname, backup_dir);			if(do_mknod(keep_name, file->mode, file->rdev) != 0) {				rprintf(FERROR, "mknod %s : %s\n",				    keep_name, strerror(errno));			} else if(verbose>2) {				rprintf(FINFO, "make_backup : DEVICE %s successful.\n", fname);			}		}		kept = 1;		do_unlink(fname);	}#endif	if(!kept && S_ISDIR(file->mode)) {		/* make an empty directory */		make_bak_dir(fname, backup_dir);		do_mkdir(keep_name, file->mode);		ret_code = do_rmdir(fname);		if(verbose>2) {			rprintf(FINFO, "make_backup : RMDIR %s returns %i\n",			    fname, ret_code);		}		kept = 1;	}#if SUPPORT_LINKS	if(!kept && preserve_links && S_ISLNK(file->mode)) {		extern int safe_symlinks;		if (safe_symlinks && unsafe_symlink(file->link, keep_name)) {			if (verbose) {				rprintf(FINFO, "ignoring unsafe symlink %s -> %s\n",					keep_name, file->link);			}			kept = 1;		}		make_bak_dir(fname, backup_dir);		if(do_symlink(file->link, keep_name) != 0) {			rprintf(FERROR, "link %s -> %s : %s\n",			    keep_name, file->link, strerror(errno));		}		do_unlink(fname);		kept = 1;	}#endif	if(!kept && preserve_hard_links && check_hard_link(file)) {		if(verbose > 1)			rprintf(FINFO, "%s is a hard link\n", f_name(file));	}	if(!kept && !S_ISREG(file->mode)) {		rprintf(FINFO, "make_bak: skipping non-regular file %s\n",		    fname);	}	/* move to keep tree if a file */	if(!kept) {		if (!robust_move (fname, keep_name)) {			rprintf(FERROR, "keep_backup failed %s -> %s : %s\n",			    fname, keep_name, strerror(errno));		}	}	set_perms (keep_name, file, NULL, 0);	free_file (file);	free (file);	if (verbose > 1)		rprintf (FINFO, "keep_backup %s -> %s\n", fname, keep_name);	return 1;} /* keep_backup */