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 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* 28 * Copyright (c) 1988 AT&T 29 * All Rights Reserved. 30 */ 31 32 #pragma ident "%Z%%M% %I% %E% SMI" 33 34 /* 35 * NOTE: The environment symbol pair may also occur in crt1.o. The definitions 36 * within crt1.o are required for the generation of ABI compliant applications 37 * (see bugid 1181124). No other symbol definitions should be added to this 38 * file. 39 */ 40 41 /* 42 * The original SVR3 ABI states: 43 * 44 * Application Constraints 45 * As described above, libsys provides symbols for applications. In a few cases, 46 * however, an application is obliged to provide symbols for the library. 47 * 48 * extern char **environ; 49 * Normally, this symbol is synonymous with environ, as 50 * exec(BA_OS) describes. This isn't always true, though, because 51 * ANSI C does not define environ. Thus, an ANSI C-conforming 52 * application can define its own environ symbol, unrelated to the pro- 53 * cess environment. If the application defines environ and intends it 54 * to have the System V Interface Definition, Third Edition semantics, it 55 * must also define _environ so that the two symbols refer to the same 56 * data object. 57 * 58 * The ABI description implies that the process environment should use 59 * _environ and that nothing in libc should make reference to the unadorned 60 * "environ" symbol. This way, an application can define and use a symbol 61 * named "environ" for its own purposes without affecting the actual 62 * process environment. 63 */ 64 65 #pragma weak environ = _environ 66 const char **_environ = 0; 67