8d3257a7dc
Change-Id: I5da48038fd5e4cdeefaeba42cdc74eb588b3448d Signed-off-by: Mike Lockwood <lockwood@android.com>
139 lines
3.6 KiB
C++
139 lines
3.6 KiB
C++
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "MtpDatabase.h"
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#include "MtpStorage.h"
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/statfs.h>
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#include <unistd.h>
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#include <dirent.h>
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#include <errno.h>
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#include <string.h>
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#include <stdio.h>
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#include <limits.h>
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namespace android {
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MtpStorage::MtpStorage(MtpStorageID id, const char* filePath, MtpDatabase* db)
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: mStorageID(id),
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mFilePath(filePath),
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mDatabase(db),
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mMaxCapacity(0)
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{
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}
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MtpStorage::~MtpStorage() {
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}
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int MtpStorage::getType() const {
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return MTP_STORAGE_FIXED_RAM;
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}
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int MtpStorage::getFileSystemType() const {
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return MTP_STORAGE_FILESYSTEM_HIERARCHICAL;
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}
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int MtpStorage::getAccessCapability() const {
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return MTP_STORAGE_READ_WRITE;
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}
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uint64_t MtpStorage::getMaxCapacity() {
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if (mMaxCapacity == 0) {
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struct statfs stat;
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if (statfs(mFilePath, &stat))
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return -1;
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mMaxCapacity = (uint64_t)stat.f_blocks * (uint64_t)stat.f_bsize;
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}
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return mMaxCapacity;
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}
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uint64_t MtpStorage::getFreeSpace() {
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struct statfs stat;
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if (statfs(mFilePath, &stat))
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return -1;
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return (uint64_t)stat.f_bavail * (uint64_t)stat.f_bsize;
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}
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const char* MtpStorage::getDescription() const {
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return "Phone Storage";
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}
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bool MtpStorage::scanFiles() {
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mDatabase->beginTransaction();
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int ret = scanDirectory(mFilePath, MTP_PARENT_ROOT);
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mDatabase->commitTransaction();
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return (ret == 0);
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}
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int MtpStorage::scanDirectory(const char* path, MtpObjectHandle parent)
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{
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char buffer[PATH_MAX];
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struct dirent* entry;
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int length = strlen(path);
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if (length > sizeof(buffer) + 2) {
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fprintf(stderr, "path too long: %s\n", path);
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}
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DIR* dir = opendir(path);
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if (!dir) {
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fprintf(stderr, "opendir %s failed, errno: %d", path, errno);
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return -1;
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}
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strncpy(buffer, path, sizeof(buffer));
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char* fileStart = buffer + length;
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// make sure we have a trailing slash
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if (fileStart[-1] != '/') {
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*(fileStart++) = '/';
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}
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int fileNameLength = sizeof(buffer) + fileStart - buffer;
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while ((entry = readdir(dir))) {
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const char* name = entry->d_name;
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// ignore "." and "..", as well as any files or directories staring with dot
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if (name[0] == '.') {
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continue;
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}
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if (strlen(name) + 1 > fileNameLength) {
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fprintf(stderr, "path too long for %s\n", name);
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continue;
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}
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strcpy(fileStart, name);
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struct stat statbuf;
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memset(&statbuf, 0, sizeof(statbuf));
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stat(buffer, &statbuf);
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if (entry->d_type == DT_DIR) {
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MtpObjectHandle handle = mDatabase->addFile(buffer, MTP_FORMAT_ASSOCIATION,
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parent, mStorageID, 0, 0, statbuf.st_mtime);
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scanDirectory(buffer, handle);
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} else if (entry->d_type == DT_REG) {
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mDatabase->addFile(buffer, MTP_FORMAT_UNDEFINED, parent, mStorageID,
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statbuf.st_size, 0, statbuf.st_mtime);
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}
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}
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closedir(dir);
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return 0;
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}
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} // namespace android
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