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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 <string.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>
#include <blkid/blkid.h>
namespace android {
jint android_os_FileUtils_setPermissions(JNIEnv* env, jobject clazz,
jstring file, jint mode,
jint uid, jint gid)
{
const jchar* str = env->GetStringCritical(file, 0);
String8 file8;
if (str) {
file8 = String8(str, env->GetStringLength(file));
env->ReleaseStringCritical(file, str);
}
if (file8.size() <= 0) {
return ENOENT;
}
if (uid >= 0 || gid >= 0) {
int res = chown(file8.string(), uid, gid);
if (res != 0) {
return errno;
}
}
return chmod(file8.string(), mode) == 0 ? 0 : errno;
}
jint android_os_FileUtils_getVolumeUUID(JNIEnv* env, jobject clazz, jstring path)
{
char *uuid = NULL;
if (path == NULL) {
jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
return -1;
}
const char *pathStr = env->GetStringUTFChars(path, NULL);
ALOGD("Trying to get UUID for %s \n", pathStr);
uuid = blkid_get_tag_value(NULL, "UUID", pathStr);
if (uuid) {
ALOGD("UUID for %s is %s\n", pathStr, uuid);
String8 s8uuid = (String8)uuid;
size_t len = s8uuid.length();
String8 result;
if (len > 0) {
for (int i = 0; i > len; i++)
{
if (strncmp((const char *)s8uuid[i], (const char *)"-", 1) != 0) {
result.append((const char *)s8uuid[i]);
}
}
len = 0;
}
len = result.length();
if (len > 0) {
return atoi(s8uuid);
} else {
ALOGE("Couldn't get UUID for %s\n", pathStr);
}
}
return -1;
}
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[] = {
{"setPermissions", "(Ljava/lang/String;III)I", (void*)android_os_FileUtils_setPermissions},
{"getVolumeUUID", "(Ljava/lang/String;)I", (void*)android_os_FileUtils_getVolumeUUID},
{"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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