155682Smarkm/* 2233294Sstas * Copyright (c) 1995, 1996, 1997 Kungliga Tekniska H��gskolan 355682Smarkm * (Royal Institute of Technology, Stockholm, Sweden). 455682Smarkm * All rights reserved. 5233294Sstas * 655682Smarkm * Redistribution and use in source and binary forms, with or without 755682Smarkm * modification, are permitted provided that the following conditions 855682Smarkm * are met: 9233294Sstas * 1055682Smarkm * 1. Redistributions of source code must retain the above copyright 1155682Smarkm * notice, this list of conditions and the following disclaimer. 12233294Sstas * 1355682Smarkm * 2. Redistributions in binary form must reproduce the above copyright 1455682Smarkm * notice, this list of conditions and the following disclaimer in the 1555682Smarkm * documentation and/or other materials provided with the distribution. 16233294Sstas * 1755682Smarkm * 3. Neither the name of the Institute nor the names of its contributors 1855682Smarkm * may be used to endorse or promote products derived from this software 1955682Smarkm * without specific prior written permission. 20233294Sstas * 2155682Smarkm * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 2255682Smarkm * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2355682Smarkm * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2455682Smarkm * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 2555682Smarkm * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2655682Smarkm * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2755682Smarkm * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2855682Smarkm * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2955682Smarkm * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3055682Smarkm * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3155682Smarkm * SUCH DAMAGE. 3255682Smarkm */ 3355682Smarkm 3455682Smarkm#include <config.h> 3555682Smarkm 3655682Smarkm#include <stdlib.h> 3755682Smarkm 38233294Sstas#if !HAVE_DECL_ENVIRON 3955682Smarkmextern char **environ; 40233294Sstas#endif 4155682Smarkm 4255682Smarkm/* 4355682Smarkm * putenv -- 4455682Smarkm * String points to a string of the form name=value. 4555682Smarkm * 4655682Smarkm * Makes the value of the environment variable name equal to 4755682Smarkm * value by altering an existing variable or creating a new one. 4855682Smarkm */ 4972445Sassar 50233294SstasROKEN_LIB_FUNCTION int ROKEN_LIB_CALL 5172445Sassarputenv(const char *string) 5255682Smarkm{ 5355682Smarkm int i; 5472445Sassar const char *eq = (const char *)strchr(string, '='); 5555682Smarkm int len; 56233294Sstas 5772445Sassar if (eq == NULL) 5872445Sassar return 1; 5972445Sassar len = eq - string; 6055682Smarkm 6172445Sassar if(environ == NULL) { 6255682Smarkm environ = malloc(sizeof(char*)); 6355682Smarkm if(environ == NULL) 6455682Smarkm return 1; 6555682Smarkm environ[0] = NULL; 6655682Smarkm } 6755682Smarkm 6872445Sassar for(i = 0; environ[i] != NULL; i++) 6972445Sassar if(strncmp(string, environ[i], len) == 0) { 7072445Sassar environ[i] = string; 7155682Smarkm return 0; 7255682Smarkm } 7372445Sassar environ = realloc(environ, sizeof(char*) * (i + 2)); 7455682Smarkm if(environ == NULL) 7555682Smarkm return 1; 7672445Sassar environ[i] = string; 7755682Smarkm environ[i+1] = NULL; 7855682Smarkm return 0; 7955682Smarkm} 80