1 /* $NetBSD: setenv.c,v 1.1.1.1 2011/04/13 18:15:43 elric Exp $ */ 2 3 /* 4 * Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan 5 * (Royal Institute of Technology, Stockholm, Sweden). 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * 3. Neither the name of the Institute nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <config.h> 37 38 #include <krb5/roken.h> 39 40 #include <stdlib.h> 41 #include <string.h> 42 43 /* 44 * This is the easy way out, use putenv to implement setenv. We might 45 * leak some memory but that is ok since we are usally about to exec 46 * anyway. 47 */ 48 49 ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL 50 setenv(const char *var, const char *val, int rewrite) 51 { 52 #ifndef _WIN32 53 char *t = NULL; 54 55 if (!rewrite && getenv(var) != 0) 56 return 0; 57 58 if (asprintf (&t, "%s=%s", var, val) < 0 || t == NULL) 59 return -1; 60 61 if (putenv(t) == 0) 62 return 0; 63 else 64 return -1; 65 #else /* Win32 */ 66 char dummy[8]; 67 68 if (!rewrite && GetEnvironmentVariable(var, dummy, sizeof(dummy)/sizeof(char)) != 0) 69 return 0; 70 71 if (SetEnvironmentVariable(var, val) == 0) 72 return -1; 73 else 74 return 0; 75 #endif 76 } 77