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/* //device/libs/android_runtime/android_util_Process.cpp
**
** Copyright 2006, The Android Open Source Project
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
#define LOG_TAG "FileUtils"
#include <utils/Log.h>
#include <android_runtime/AndroidRuntime.h>
#include "JNIHelp.h"
#include <sys/errno.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>
#include <signal.h>
#include <sys/ioctl.h>
#include <linux/msdos_fs.h>
namespace android {
jint android_os_FileUtils_getFatVolumeId(JNIEnv* env, jobject clazz, jstring path)
{
if (path == NULL) {
jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
return -1;
}
const char *pathStr = env->GetStringUTFChars(path, NULL);
int result = -1;
// only if our system supports this ioctl
#ifdef VFAT_IOCTL_GET_VOLUME_ID
int fd = open(pathStr, O_RDONLY);
if (fd >= 0) {
result = ioctl(fd, VFAT_IOCTL_GET_VOLUME_ID);
close(fd);
}
#endif
env->ReleaseStringUTFChars(path, pathStr);
return result;
}
static const JNINativeMethod methods[] = {
{"getFatVolumeId", "(Ljava/lang/String;)I", (void*)android_os_FileUtils_getFatVolumeId},
};
static const char* const kFileUtilsPathName = "android/os/FileUtils";
int register_android_os_FileUtils(JNIEnv* env)
{
return AndroidRuntime::registerNativeMethods(
env, kFileUtilsPathName,
methods, NELEM(methods));
}
}
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