11.21Schristos/* $NetBSD: putenv.c,v 1.21 2015/01/20 18:31:25 christos Exp $ */ 21.5Sthorpej 31.1Scgd/*- 41.8Sperry * Copyright (c) 1988, 1993 51.8Sperry * The Regents of the University of California. All rights reserved. 61.1Scgd * 71.1Scgd * Redistribution and use in source and binary forms, with or without 81.1Scgd * modification, are permitted provided that the following conditions 91.1Scgd * are met: 101.1Scgd * 1. Redistributions of source code must retain the above copyright 111.1Scgd * notice, this list of conditions and the following disclaimer. 121.1Scgd * 2. Redistributions in binary form must reproduce the above copyright 131.1Scgd * notice, this list of conditions and the following disclaimer in the 141.1Scgd * documentation and/or other materials provided with the distribution. 151.12Sagc * 3. Neither the name of the University nor the names of its contributors 161.1Scgd * may be used to endorse or promote products derived from this software 171.1Scgd * without specific prior written permission. 181.1Scgd * 191.1Scgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 201.1Scgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 211.1Scgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 221.1Scgd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 231.1Scgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 241.1Scgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 251.1Scgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 261.1Scgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 271.1Scgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 281.1Scgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 291.1Scgd * SUCH DAMAGE. 301.1Scgd */ 311.1Scgd 321.6Schristos#include <sys/cdefs.h> 331.1Scgd#if defined(LIBC_SCCS) && !defined(lint) 341.5Sthorpej#if 0 351.8Sperrystatic char sccsid[] = "@(#)putenv.c 8.2 (Berkeley) 3/27/94"; 361.5Sthorpej#else 371.21Schristos__RCSID("$NetBSD: putenv.c,v 1.21 2015/01/20 18:31:25 christos Exp $"); 381.5Sthorpej#endif 391.1Scgd#endif /* LIBC_SCCS and not lint */ 401.1Scgd 411.7Sjtc#include "namespace.h" 421.9Slukem 431.9Slukem#include <assert.h> 441.9Slukem#include <errno.h> 451.1Scgd#include <stdlib.h> 461.1Scgd#include <string.h> 471.19Stron 481.19Stron#include "env.h" 491.13Schristos#include "local.h" 501.7Sjtc 511.1Scgdint 521.13Schristosputenv(char *str) 531.1Scgd{ 541.19Stron size_t l_name; 551.19Stron int rv; 561.9Slukem 571.9Slukem _DIAGASSERT(str != NULL); 581.1Scgd 591.19Stron l_name = __envvarnamelen(str, true); 601.19Stron if (l_name == 0) { 611.17Snjoly errno = EINVAL; 621.13Schristos return -1; 631.17Snjoly } 641.13Schristos 651.19Stron rv = -1; 661.19Stron if (__writelockenv()) { 671.19Stron ssize_t offset; 681.19Stron 691.19Stron offset = __getenvslot(str, l_name, true); 701.19Stron if (offset != -1) { 711.19Stron if (environ[offset] != NULL) 721.19Stron __freeenvvar(environ[offset]); 731.19Stron environ[offset] = str; 741.13Schristos 751.19Stron rv = 0; 761.19Stron } 771.13Schristos 781.19Stron (void)__unlockenv(); 791.14Stron } 801.13Schristos 811.19Stron return rv; 821.1Scgd} 83