14887Schin /*********************************************************************** 24887Schin * * 34887Schin * This software is part of the ast package * 4*12068SRoger.Faulkner@Oracle.COM * Copyright (c) 1985-2010 AT&T Intellectual Property * 54887Schin * and is licensed under the * 64887Schin * Common Public License, Version 1.0 * 78462SApril.Chin@Sun.COM * by AT&T Intellectual Property * 84887Schin * * 94887Schin * A copy of the License is available at * 104887Schin * http://www.opensource.org/licenses/cpl1.0.txt * 114887Schin * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 124887Schin * * 134887Schin * Information and Software Systems Research * 144887Schin * AT&T Research * 154887Schin * Florham Park NJ * 164887Schin * * 174887Schin * Glenn Fowler <gsf@research.att.com> * 184887Schin * David Korn <dgk@research.att.com> * 194887Schin * Phong Vo <kpv@research.att.com> * 204887Schin * * 214887Schin ***********************************************************************/ 224887Schin #pragma prototyped 234887Schin 244887Schin #include <ast.h> 254887Schin 264887Schin #if _lib_readlink 274887Schin 284887Schin NoN(readlink) 294887Schin 304887Schin #else 314887Schin 324887Schin #include "fakelink.h" 334887Schin 344887Schin #include <error.h> 354887Schin 364887Schin #ifndef ENOSYS 374887Schin #define ENOSYS EINVAL 384887Schin #endif 394887Schin 404887Schin int 414887Schin readlink(const char* path, char* buf, int siz) 424887Schin { 434887Schin int fd; 444887Schin int n; 454887Schin 464887Schin if (siz > sizeof(FAKELINK_MAGIC)) 474887Schin { 484887Schin if ((fd = open(path, O_RDONLY)) < 0) 494887Schin return -1; 504887Schin if (read(fd, buf, sizeof(FAKELINK_MAGIC)) == sizeof(FAKELINK_MAGIC) && !strcmp(buf, FAKELINK_MAGIC) && (n = read(fd, buf, siz)) > 0 && !buf[n - 1]) 514887Schin { 524887Schin close(fd); 534887Schin return n; 544887Schin } 554887Schin close(fd); 564887Schin } 574887Schin errno = ENOSYS; 584887Schin return -1; 594887Schin } 604887Schin 614887Schin #endif 62