1da2e3ebdSchin /*********************************************************************** 2da2e3ebdSchin * * 3da2e3ebdSchin * This software is part of the ast package * 4*3e14f97fSRoger A. Faulkner * Copyright (c) 1985-2010 AT&T Intellectual Property * 5da2e3ebdSchin * and is licensed under the * 6da2e3ebdSchin * Common Public License, Version 1.0 * 77c2fbfb3SApril Chin * by AT&T Intellectual Property * 8da2e3ebdSchin * * 9da2e3ebdSchin * A copy of the License is available at * 10da2e3ebdSchin * http://www.opensource.org/licenses/cpl1.0.txt * 11da2e3ebdSchin * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 12da2e3ebdSchin * * 13da2e3ebdSchin * Information and Software Systems Research * 14da2e3ebdSchin * AT&T Research * 15da2e3ebdSchin * Florham Park NJ * 16da2e3ebdSchin * * 17da2e3ebdSchin * Glenn Fowler <gsf@research.att.com> * 18da2e3ebdSchin * David Korn <dgk@research.att.com> * 19da2e3ebdSchin * Phong Vo <kpv@research.att.com> * 20da2e3ebdSchin * * 21da2e3ebdSchin ***********************************************************************/ 22da2e3ebdSchin #pragma prototyped 23da2e3ebdSchin 24da2e3ebdSchin /* 25da2e3ebdSchin * seekdir 26da2e3ebdSchin * 27da2e3ebdSchin * seek on directory stream 28da2e3ebdSchin * this is not optimal because there aren't portable 29da2e3ebdSchin * semantics for directory seeks 30da2e3ebdSchin */ 31da2e3ebdSchin 32da2e3ebdSchin #include "dirlib.h" 33da2e3ebdSchin 34da2e3ebdSchin #if _dir_ok 35da2e3ebdSchin 36da2e3ebdSchin NoN(seekdir) 37da2e3ebdSchin 38da2e3ebdSchin #else 39da2e3ebdSchin 40da2e3ebdSchin void 41da2e3ebdSchin seekdir(register DIR* dirp, long loc) 42da2e3ebdSchin { 43da2e3ebdSchin off_t base; /* file location of block */ 44da2e3ebdSchin off_t offset; /* offset within block */ 45da2e3ebdSchin 46da2e3ebdSchin if (telldir(dirp) != loc) 47da2e3ebdSchin { 48da2e3ebdSchin lseek(dirp->dd_fd, 0L, SEEK_SET); 49da2e3ebdSchin dirp->dd_loc = dirp->dd_size = 0; 50da2e3ebdSchin while (telldir(dirp) != loc) 51da2e3ebdSchin if (!readdir(dirp)) 52da2e3ebdSchin break; /* "can't happen" */ 53da2e3ebdSchin } 54da2e3ebdSchin } 55da2e3ebdSchin 56da2e3ebdSchin #endif 57