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