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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * 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 #endif
  34 
  35 #include <string.h>
  36 
  37 #include "jni.h"
  38 
  39 #ifndef MAXDNAME
  40 #define MAXDNAME                1025
  41 #endif
  42 
  43 
  44 /*
  45  * Class:     sun_net_dns_ResolverConfigurationImpl
  46  * Method:    localDomain0
  47  * Signature: ()Ljava/lang/String;
  48  */
  49 JNIEXPORT jstring JNICALL
  50 Java_sun_net_dns_ResolverConfigurationImpl_localDomain0(JNIEnv *env, jclass cls)
  51 {
  52     /*
  53      * On Solaris the LOCALDOMAIN environment variable has absolute
  54      * priority.
  55      */
  56 #ifdef __solaris__
  57     {
  58         char *cp = getenv("LOCALDOMAIN");
  59         if (cp != NULL) {
  60             jstring s = (*env)->NewStringUTF(env, cp);
  61             return s;
  62         }
  63     }
  64 #endif
  65     return (jstring)NULL;
  66 }
  67 
  68 /*
  69  * Class:     sun_net_dns_ResolverConfigurationImpl
  70  * Method:    loadConfig0
  71  * Signature: ()Ljava/lang/String;
  72  */
  73 JNIEXPORT jstring JNICALL
  74 Java_sun_net_dns_ResolverConfigurationImpl_fallbackDomain0(JNIEnv *env, jclass cls)
  75 {
  76     char buf[MAXDNAME];
  77 
  78     /*
  79      * On Solaris if domain or search directives aren't specified
  80      * in /etc/resolv.conf then sysinfo or gethostname is used to
  81      * determine the domain name.
  82      *
  83      * On Linux if domain or search directives aren't specified
  84      * then gethostname is used.
  85      */
  86 
  87 #ifdef __solaris__
  88     {
  89         int ret = sysinfo(SI_SRPC_DOMAIN, buf, sizeof(buf));
  90 
  91         if ((ret > 0) && (ret<sizeof(buf))) {
  92             char *cp;
  93             jstring s;
  94 
  95             if (buf[0] == '+') {
  96                 buf[0] = '.';
  97             }
  98             cp = strchr(buf, '.');
  99             if (cp == NULL) {
 100                 s = (*env)->NewStringUTF(env, buf);
 101             } else {
 102                 s = (*env)->NewStringUTF(env, cp+1);
 103             }
 104             return s;
 105         }
 106     }
 107 #endif
 108 
 109     if (gethostname(buf, sizeof(buf)) == 0) {
 110         char *cp;
 111 
 112         /* gethostname doesn't null terminate if insufficient space */
 113         buf[sizeof(buf)-1] = '\0';
 114 
 115         cp = strchr(buf, '.');
 116         if (cp != NULL) {
 117             jstring s = (*env)->NewStringUTF(env, cp+1);
 118             return s;
 119         }
 120     }
 121 
 122     return (jstring)NULL;
 123 }

  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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <unistd.h>
  29 #include <errno.h>
  30 




  31 #include <string.h>
  32 
  33 #include "jni.h"
  34 
  35 #ifndef MAXDNAME
  36 #define MAXDNAME                1025
  37 #endif
  38 
  39 
  40 /*
  41  * Class:     sun_net_dns_ResolverConfigurationImpl
























  42  * Method:    loadConfig0
  43  * Signature: ()Ljava/lang/String;
  44  */
  45 JNIEXPORT jstring JNICALL
  46 Java_sun_net_dns_ResolverConfigurationImpl_fallbackDomain0(JNIEnv *env, jclass cls)
  47 {
  48     char buf[MAXDNAME];
  49 
  50     /*
  51      * If domain or search directives aren't specified




  52      * then gethostname is used.
  53      */






















  54 
  55     if (gethostname(buf, sizeof(buf)) == 0) {
  56         char *cp;
  57 
  58         /* gethostname doesn't null terminate if insufficient space */
  59         buf[sizeof(buf)-1] = '\0';
  60 
  61         cp = strchr(buf, '.');
  62         if (cp != NULL) {
  63             jstring s = (*env)->NewStringUTF(env, cp+1);
  64             return s;
  65         }
  66     }
  67 
  68     return (jstring)NULL;
  69 }