11dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* $OpenBSD: getenv.c,v 1.8 2005/08/08 08:05:36 espie Exp $ */ 21dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* 31dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Copyright (c) 1987, 1993 41dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * The Regents of the University of California. All rights reserved. 51dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 61dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Redistribution and use in source and binary forms, with or without 71dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * modification, are permitted provided that the following conditions 81dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * are met: 91dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 1. Redistributions of source code must retain the above copyright 101dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * notice, this list of conditions and the following disclaimer. 111dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 2. Redistributions in binary form must reproduce the above copyright 121dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * notice, this list of conditions and the following disclaimer in the 131dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * documentation and/or other materials provided with the distribution. 141dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 3. Neither the name of the University nor the names of its contributors 151dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * may be used to endorse or promote products derived from this software 161dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * without specific prior written permission. 171dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 181dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 191dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 201dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 211dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 221dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 231dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 241dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 251dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 261dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 271dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 281dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * SUCH DAMAGE. 291dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 301dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 311dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <stdlib.h> 321dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <string.h> 331dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 341dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectchar *__findenv(const char *name, int *offset); 351dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 361dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* 371dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * __findenv -- 381dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Returns pointer to value associated with name, if any, else NULL. 391dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Sets offset to be the offset of the name/value combination in the 401dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * environmental array, for use by setenv(3) and unsetenv(3). 411dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Explicitly removes '=' in argument name. 421dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 431dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * This routine *should* be a static; don't use it. 441dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 451dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectchar * 461dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project__findenv(const char *name, int *offset) 471dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project{ 481dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project extern char **environ; 491dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int len, i; 501dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project const char *np; 511dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project char **p, *cp; 521dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 531dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (name == NULL || environ == NULL) 541dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (NULL); 551dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project for (np = name; *np && *np != '='; ++np) 561dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project ; 571dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project len = np - name; 581dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project for (p = environ; (cp = *p) != NULL; ++p) { 591dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project for (np = name, i = len; i && *cp; i--) 601dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (*cp++ != *np++) 611dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 621dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (i == 0 && *cp++ == '=') { 631dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project *offset = p - environ; 641dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (cp); 65e734769276045c0cb89d4620fdd4ef35a0e6c335André Goddard Rosa } 66e734769276045c0cb89d4620fdd4ef35a0e6c335André Goddard Rosa } 671dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (NULL); 681dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 691dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 701dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* 711dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * getenv -- 721dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Returns ptr to value associated with name, if any, else NULL. 731dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 741dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectchar * 751dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectgetenv(const char *name) 761dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project{ 771dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int offset; 781dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 791dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (__findenv(name, &offset)); 801dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 81