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 <unistd.h> 28 #include <fcntl.h> 29 #include <sys/syscall.h> 30 31 extern int __xpg4; /* defined in port/gen/xpg4.c; 0 if not xpg4/xpg4v2 */ 32 33 int 34 linkat(int fd1, const char *path1, int fd2, const char *path2, int flag) 35 { 36 return (syscall(SYS_linkat, fd1, path1, fd2, path2, flag)); 37 } 38 39 #pragma weak _link = link 40 int 41 link(const char *path1, const char *path2) 42 { 43 /* 44 * XPG4v2 link() requires that the link count of a symbolic 45 * link target be updated rather than the link itself. This 46 * matches SunOS 4.x and other BSD based implementations. 47 * However, the SVR4 merge apparently introduced the change 48 * that allowed link(src, dest) when "src" was a symbolic link, 49 * to create "dest" as a hard link to "src". Hence, the link 50 * count of the symbolic link is updated rather than the target 51 * of the symbolic link. This latter behavior remains for 52 * non-XPG4 based environments. For a more detailed discussion, 53 * see bug 1256170. 54 */ 55 if (__xpg4 != 0) 56 return (linkat(AT_FDCWD, path1, AT_FDCWD, path2, 57 AT_SYMLINK_FOLLOW)); 58 59 #if defined(_RETAIN_OLD_SYSCALLS) 60 return (syscall(SYS_link, path1, path2)); 61 #else 62 return (linkat(AT_FDCWD, path1, AT_FDCWD, path2, 0)); 63 #endif 64 } 65