J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2002 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | #include <stdio.h> |
| 27 | #include <stdlib.h> |
| 28 | #include <unistd.h> |
| 29 | #include <errno.h> |
| 30 | |
| 31 | #ifdef __solaris__ |
| 32 | #include <sys/systeminfo.h> |
| 33 | #include <strings.h> |
| 34 | #endif |
| 35 | |
| 36 | #ifdef __linux__ |
| 37 | #include <string.h> |
| 38 | #endif |
| 39 | |
| 40 | #include "jni.h" |
| 41 | |
| 42 | #ifndef MAXDNAME |
| 43 | #define MAXDNAME 1025 |
| 44 | #endif |
| 45 | |
| 46 | |
| 47 | /* |
| 48 | * Class: sun_net_dns_ResolverConfgurationImpl |
| 49 | * Method: localDomain0 |
| 50 | * Signature: ()Ljava/lang/String; |
| 51 | */ |
| 52 | JNIEXPORT jstring JNICALL |
| 53 | Java_sun_net_dns_ResolverConfigurationImpl_localDomain0(JNIEnv *env, jclass cls) |
| 54 | { |
| 55 | /* |
| 56 | * On Solaris the LOCALDOMAIN environment variable has absolute |
| 57 | * priority. |
| 58 | */ |
| 59 | #ifdef __solaris__ |
| 60 | { |
| 61 | char *cp = getenv("LOCALDOMAIN"); |
| 62 | if (cp != NULL) { |
| 63 | jstring s = (*env)->NewStringUTF(env, cp); |
| 64 | return s; |
| 65 | } |
| 66 | } |
| 67 | #endif |
| 68 | return (jstring)NULL; |
| 69 | } |
| 70 | |
| 71 | /* |
| 72 | * Class: sun_net_dns_ResolverConfgurationImpl |
| 73 | * Method: loadConfig0 |
| 74 | * Signature: ()Ljava/lang/String; |
| 75 | */ |
| 76 | JNIEXPORT jstring JNICALL |
| 77 | Java_sun_net_dns_ResolverConfigurationImpl_fallbackDomain0(JNIEnv *env, jclass cls) |
| 78 | { |
| 79 | char buf[MAXDNAME]; |
| 80 | |
| 81 | /* |
| 82 | * On Solaris if domain or search directives aren't specified |
| 83 | * in /etc/resolv.conf then sysinfo or gethostname is used to |
| 84 | * determine the domain name. |
| 85 | * |
| 86 | * On Linux if domain or search directives aren't specified |
| 87 | * then gethostname is used. |
| 88 | */ |
| 89 | |
| 90 | #ifdef __solaris__ |
| 91 | { |
| 92 | int ret = sysinfo(SI_SRPC_DOMAIN, buf, sizeof(buf)); |
| 93 | |
| 94 | if ((ret > 0) && (ret<sizeof(buf))) { |
| 95 | char *cp; |
| 96 | jstring s; |
| 97 | |
| 98 | if (buf[0] == '+') { |
| 99 | buf[0] = '.'; |
| 100 | } |
| 101 | cp = strchr(buf, '.'); |
| 102 | if (cp == NULL) { |
| 103 | s = (*env)->NewStringUTF(env, buf); |
| 104 | } else { |
| 105 | s = (*env)->NewStringUTF(env, cp+1); |
| 106 | } |
| 107 | return s; |
| 108 | } |
| 109 | } |
| 110 | #endif |
| 111 | |
| 112 | if (gethostname(buf, sizeof(buf)) == 0) { |
| 113 | char *cp; |
| 114 | |
| 115 | /* gethostname doesn't null terminate if insufficient space */ |
| 116 | buf[sizeof(buf)-1] = '\0'; |
| 117 | |
| 118 | cp = strchr(buf, '.'); |
| 119 | if (cp != NULL) { |
| 120 | jstring s = (*env)->NewStringUTF(env, cp+1); |
| 121 | return s; |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | return (jstring)NULL; |
| 126 | } |