1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. 24 */ 25 26 #include "lint.h" 27 #include <sys/syscall.h> 28 #include <sys/unistd.h> 29 #include <sys/fcntl.h> 30 31 ssize_t 32 readlinkat(int fd, const char *path, char *buf, size_t bufsize) 33 { 34 sysret_t rval; 35 int error; 36 37 error = __systemcall(&rval, SYS_readlinkat, fd, path, buf, bufsize); 38 if (error) 39 (void) __set_errno(error); 40 return ((ssize_t)rval.sys_rval1); 41 } 42 43 #pragma weak _readlink = readlink 44 ssize_t 45 readlink(const char *path, char *buf, size_t bufsize) 46 { 47 #if defined(_RETAIN_OLD_SYSCALLS) 48 sysret_t rval; 49 int error; 50 51 error = __systemcall(&rval, SYS_readlink, path, buf, bufsize); 52 if (error) 53 (void) __set_errno(error); 54 return ((ssize_t)rval.sys_rval1); 55 #else 56 return (readlinkat(AT_FDCWD, path, buf, bufsize)); 57 #endif 58 } 59