17c478bd9Sstevel@tonic-gate /* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 57c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 67c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 77c478bd9Sstevel@tonic-gate * with the License. 87c478bd9Sstevel@tonic-gate * 97c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 107c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 117c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 127c478bd9Sstevel@tonic-gate * and limitations under the License. 137c478bd9Sstevel@tonic-gate * 147c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 157c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 167c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 177c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 187c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 197c478bd9Sstevel@tonic-gate * 207c478bd9Sstevel@tonic-gate * CDDL HEADER END 217c478bd9Sstevel@tonic-gate */ 227c478bd9Sstevel@tonic-gate /* 237c478bd9Sstevel@tonic-gate * Copyright (c) 1996, by Sun Microsystems, Inc. 247c478bd9Sstevel@tonic-gate * All rights reserved. 257c478bd9Sstevel@tonic-gate */ 267c478bd9Sstevel@tonic-gate 277c478bd9Sstevel@tonic-gate /* 287c478bd9Sstevel@tonic-gate * MKS interface extension. 297c478bd9Sstevel@tonic-gate * A version of getenv() that doesn't overwrite it's return value 307c478bd9Sstevel@tonic-gate * on each call. 317c478bd9Sstevel@tonic-gate * 327c478bd9Sstevel@tonic-gate * Copyright 1995 by Mortice Kern Systems Inc. All rights reserved. 337c478bd9Sstevel@tonic-gate * 347c478bd9Sstevel@tonic-gate */ 357c478bd9Sstevel@tonic-gate 367c478bd9Sstevel@tonic-gate #ifdef M_RCSID 377c478bd9Sstevel@tonic-gate #ifndef lint 387c478bd9Sstevel@tonic-gate static char const rcsID[] = "$Header: /rd/src/libc/mks/rcs/m_getenv.c 1.2 1995/07/11 16:53:01 ross Exp $"; 397c478bd9Sstevel@tonic-gate #endif /*lint*/ 407c478bd9Sstevel@tonic-gate #endif /*M_RCSID*/ 417c478bd9Sstevel@tonic-gate 427c478bd9Sstevel@tonic-gate #include <mks.h> 437c478bd9Sstevel@tonic-gate #include <stdlib.h> 447c478bd9Sstevel@tonic-gate #include <string.h> 457c478bd9Sstevel@tonic-gate 467c478bd9Sstevel@tonic-gate #ifdef M_NON_STATIC_GETENV 477c478bd9Sstevel@tonic-gate 487c478bd9Sstevel@tonic-gate #undef __m_getenv 497c478bd9Sstevel@tonic-gate 507c478bd9Sstevel@tonic-gate /*f 517c478bd9Sstevel@tonic-gate * Assume getenv() works the way we expect it to on PC systems. 527c478bd9Sstevel@tonic-gate */ 537c478bd9Sstevel@tonic-gate char * __m_getenv(char const * name)547c478bd9Sstevel@tonic-gate__m_getenv(char const *name) { 557c478bd9Sstevel@tonic-gate return getenv(name); 567c478bd9Sstevel@tonic-gate } 577c478bd9Sstevel@tonic-gate 587c478bd9Sstevel@tonic-gate #else /* M_NON_STATIC_GETENV */ 597c478bd9Sstevel@tonic-gate 607c478bd9Sstevel@tonic-gate extern char **environ; 617c478bd9Sstevel@tonic-gate 627c478bd9Sstevel@tonic-gate /*f 637c478bd9Sstevel@tonic-gate * A version of getenv safe to use in library functions. According to 647c478bd9Sstevel@tonic-gate * ANSI C and XPG 4 no library function shall behave as if it called 657c478bd9Sstevel@tonic-gate * getenv. This is a problem on systems that have getenv functions 667c478bd9Sstevel@tonic-gate * that overwrite their return value on each call. 677c478bd9Sstevel@tonic-gate */ 687c478bd9Sstevel@tonic-gate 697c478bd9Sstevel@tonic-gate char * __m_getenv(char const * name)707c478bd9Sstevel@tonic-gate__m_getenv(char const *name) { 717c478bd9Sstevel@tonic-gate if (m_setenv() != NULL) { 727c478bd9Sstevel@tonic-gate int len = strlen(name); 737c478bd9Sstevel@tonic-gate char **envp = environ; 747c478bd9Sstevel@tonic-gate char *s = *envp++; 757c478bd9Sstevel@tonic-gate 767c478bd9Sstevel@tonic-gate while(s != NULL) { 777c478bd9Sstevel@tonic-gate if (strncmp(name, s, len) == 0 && s[len] == '=') { 787c478bd9Sstevel@tonic-gate return s + len + 1; 797c478bd9Sstevel@tonic-gate } 807c478bd9Sstevel@tonic-gate s = *envp++; 817c478bd9Sstevel@tonic-gate } 827c478bd9Sstevel@tonic-gate } 837c478bd9Sstevel@tonic-gate return NULL; 847c478bd9Sstevel@tonic-gate } 85*1da57d55SToomas Soome 867c478bd9Sstevel@tonic-gate #endif /* M_NON_STATIC_GETENV */ 87