/* $OpenBSD: telldir.h,v 1.5 2012/03/22 04:11:53 matthew Exp $ */ /* * Copyright (c) 1983, 1993 * The Regents of the University of California. All rights reserved. * * Copyright (c) 2000 * Daniel Eischen. 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. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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. * * $FreeBSD: src/lib/libc/gen/telldir.h,v 1.2 2001/01/24 12:59:24 deischen Exp $ */ #ifndef _TELLDIR_H_ #define _TELLDIR_H_ /* * One of these structures is malloced to describe the current directory * position each time telldir is called. It records the current magic * cookie returned by getdirentries and the offset within the buffer * associated with that return value. */ struct ddloc { off_t loc_seek; /* magic cookie returned by getdirentries */ long loc_loc; /* offset of entry in buffer */ }; /* * One of these structures is malloced for each DIR to record telldir * positions. */ struct _telldir { struct ddloc *td_locs; /* locations */ size_t td_sz; /* size of locations */ long td_loccnt; /* index of entry for sequential readdir's */ long td_last; /* last tell/seekdir */ }; /* structure describing an open directory. */ struct _dirdesc { int dd_fd; /* file descriptor associated with directory */ long dd_loc; /* offset in current buffer */ long dd_size; /* amount of data returned by getdirentries */ char *dd_buf; /* data buffer */ int dd_len; /* size of data buffer */ off_t dd_seek; /* magic cookie returned by getdirentries */ off_t dd_rewind; /* magic cookie for rewinding */ int dd_unused; /* was flags for readdir */ struct _telldir *dd_td; /* telldir position recording */ void *dd_lock; /* mutex to protect struct */ }; long _telldir_unlocked(DIR *); void __seekdir(DIR *, long); #endif