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/*
* Copyright (C) 2010 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.
*/
#include "MtpDatabase.h"
#include "MtpStorage.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/statfs.h>
#include <unistd.h>
#include <dirent.h>
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include <limits.h>
namespace android {
MtpStorage::MtpStorage(MtpStorageID id, const char* filePath, MtpDatabase* db)
: mStorageID(id),
mFilePath(filePath),
mDatabase(db),
mMaxCapacity(0)
{
}
MtpStorage::~MtpStorage() {
}
int MtpStorage::getType() const {
return MTP_STORAGE_FIXED_RAM;
}
int MtpStorage::getFileSystemType() const {
return MTP_STORAGE_FILESYSTEM_HIERARCHICAL;
}
int MtpStorage::getAccessCapability() const {
return MTP_STORAGE_READ_WRITE;
}
uint64_t MtpStorage::getMaxCapacity() {
if (mMaxCapacity == 0) {
struct statfs stat;
if (statfs(mFilePath, &stat))
return -1;
mMaxCapacity = (uint64_t)stat.f_blocks * (uint64_t)stat.f_bsize;
}
return mMaxCapacity;
}
uint64_t MtpStorage::getFreeSpace() {
struct statfs stat;
if (statfs(mFilePath, &stat))
return -1;
return (uint64_t)stat.f_bavail * (uint64_t)stat.f_bsize;
}
const char* MtpStorage::getDescription() const {
return "Phone Storage";
}
bool MtpStorage::scanFiles() {
mDatabase->beginTransaction();
int ret = scanDirectory(mFilePath, MTP_PARENT_ROOT);
mDatabase->commitTransaction();
return (ret == 0);
}
int MtpStorage::scanDirectory(const char* path, MtpObjectHandle parent)
{
char buffer[PATH_MAX];
struct dirent* entry;
int length = strlen(path);
if (length > sizeof(buffer) + 2) {
fprintf(stderr, "path too long: %s\n", path);
}
DIR* dir = opendir(path);
if (!dir) {
fprintf(stderr, "opendir %s failed, errno: %d", path, errno);
return -1;
}
strncpy(buffer, path, sizeof(buffer));
char* fileStart = buffer + length;
// make sure we have a trailing slash
if (fileStart[-1] != '/') {
*(fileStart++) = '/';
}
int fileNameLength = sizeof(buffer) + fileStart - buffer;
while ((entry = readdir(dir))) {
const char* name = entry->d_name;
// ignore "." and "..", as well as any files or directories staring with dot
if (name[0] == '.') {
continue;
}
if (strlen(name) + 1 > fileNameLength) {
fprintf(stderr, "path too long for %s\n", name);
continue;
}
strcpy(fileStart, name);
struct stat statbuf;
memset(&statbuf, 0, sizeof(statbuf));
stat(buffer, &statbuf);
if (entry->d_type == DT_DIR) {
MtpObjectHandle handle = mDatabase->addFile(buffer, MTP_FORMAT_ASSOCIATION,
parent, mStorageID, 0, 0, statbuf.st_mtime);
scanDirectory(buffer, handle);
} else if (entry->d_type == DT_REG) {
mDatabase->addFile(buffer, MTP_FORMAT_UNDEFINED, parent, mStorageID,
statbuf.st_size, 0, statbuf.st_mtime);
}
}
closedir(dir);
return 0;
}
} // namespace android
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