9  * by Oracle 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 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 <unistd.h>
  27 #include <fcntl.h>
  28 


  29 #include "jvm.h"
  30 #include "io_util_md.h"
  31 

  32 #include "java_io_FileDescriptor.h"
  33 
  34 /*******************************************************************/
  35 /*  BEGIN JNI ********* BEGIN JNI *********** BEGIN JNI ************/
  36 /*******************************************************************/
  37 
  38 /* field id for jint 'fd' in java.io.FileDescriptor */
  39 jfieldID IO_fd_fdID;
  40 
  41 /* field id for jboolean 'append' in java.io.FileDescriptor */
  42 jfieldID IO_append_fdID;
  43 
  44 /**************************************************************
  45  * static methods to store field ID's in initializers
  46  */
  47 
  48 JNIEXPORT void JNICALL
  49 Java_java_io_FileDescriptor_initIDs(JNIEnv *env, jclass fdClass) {
  50     IO_fd_fdID = (*env)->GetFieldID(env, fdClass, "fd", "I");
  51     IO_append_fdID = (*env)->GetFieldID(env, fdClass, "append", "Z");
  52 }
  53 
  54 /**************************************************************
  55  * File Descriptor
  56  */
  57 
  58 JNIEXPORT void JNICALL
  59 Java_java_io_FileDescriptor_sync(JNIEnv *env, jobject this) {
  60     FD fd = THIS_FD(this);
  61     if (IO_Sync(fd) == -1) {
  62         JNU_ThrowByName(env, "java/io/SyncFailedException", "sync failed");
  63     }
  64 }
  65 
  66 JNIEXPORT jboolean JNICALL
  67 Java_java_io_FileDescriptor_getAppend(JNIEnv *env, jclass fdClass, jint fd) {
  68     int flags = fcntl(fd, F_GETFL);
  69     return ((flags & O_APPEND) == 0) ? JNI_FALSE : JNI_TRUE;
  70 }

   9  * by Oracle 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 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 <unistd.h>
  27 #include <fcntl.h>
  28 
  29 #include "jni.h"
  30 #include "jni_util.h"
  31 #include "jvm.h"

  32 
  33 #include "io_util_md.h"
  34 #include "java_io_FileDescriptor.h"
  35 
  36 /*******************************************************************/
  37 /*  BEGIN JNI ********* BEGIN JNI *********** BEGIN JNI ************/
  38 /*******************************************************************/
  39 
  40 /* field id for jint 'fd' in java.io.FileDescriptor */
  41 jfieldID IO_fd_fdID;
  42 
  43 /* field id for jboolean 'append' in java.io.FileDescriptor */
  44 jfieldID IO_append_fdID;
  45 
  46 /**************************************************************
  47  * static methods to store field ID's in initializers
  48  */
  49 
  50 JNIEXPORT void JNICALL
  51 Java_java_io_FileDescriptor_initIDs(JNIEnv *env, jclass fdClass) {
  52     CHECK_NULL(IO_fd_fdID = (*env)->GetFieldID(env, fdClass, "fd", "I"));
  53     CHECK_NULL(IO_append_fdID = (*env)->GetFieldID(env, fdClass, "append", "Z"));
  54 }
  55 
  56 /**************************************************************
  57  * File Descriptor
  58  */
  59 
  60 JNIEXPORT void JNICALL
  61 Java_java_io_FileDescriptor_sync(JNIEnv *env, jobject this) {
  62     FD fd = THIS_FD(this);
  63     if (IO_Sync(fd) == -1) {
  64         JNU_ThrowByName(env, "java/io/SyncFailedException", "sync failed");
  65     }
  66 }
  67 
  68 JNIEXPORT jboolean JNICALL
  69 Java_java_io_FileDescriptor_getAppend(JNIEnv *env, jclass fdClass, jint fd) {
  70     int flags = fcntl(fd, F_GETFL);
  71     return ((flags & O_APPEND) == 0) ? JNI_FALSE : JNI_TRUE;
  72 }