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/*
* Copyright (C) 2009 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_NDEBUG 0
#define LOG_TAG "MediaScanner"
#include <utils/Log.h>
#include <media/mediascanner.h>
#include <sys/stat.h>
#include <dirent.h>
namespace android {
MediaScanner::MediaScanner()
: mLocale(NULL) {
}
MediaScanner::~MediaScanner() {
setLocale(NULL);
}
void MediaScanner::setLocale(const char *locale) {
if (mLocale) {
free(mLocale);
mLocale = NULL;
}
if (locale) {
mLocale = strdup(locale);
}
}
const char *MediaScanner::locale() const {
return mLocale;
}
MediaScanResult MediaScanner::processDirectory(
const char *path, MediaScannerClient &client) {
int pathLength = strlen(path);
if (pathLength >= PATH_MAX) {
return MEDIA_SCAN_RESULT_SKIPPED;
}
char* pathBuffer = (char *)malloc(PATH_MAX + 1);
if (!pathBuffer) {
return MEDIA_SCAN_RESULT_ERROR;
}
int pathRemaining = PATH_MAX - pathLength;
strcpy(pathBuffer, path);
if (pathLength > 0 && pathBuffer[pathLength - 1] != '/') {
pathBuffer[pathLength] = '/';
pathBuffer[pathLength + 1] = 0;
--pathRemaining;
}
client.setLocale(locale());
MediaScanResult result = doProcessDirectory(pathBuffer, pathRemaining, client, false);
free(pathBuffer);
return result;
}
MediaScanResult MediaScanner::doProcessDirectory(
char *path, int pathRemaining, MediaScannerClient &client, bool noMedia) {
// place to copy file or directory name
char* fileSpot = path + strlen(path);
struct dirent* entry;
// Treat all files as non-media in directories that contain a ".nomedia" file
if (pathRemaining >= 8 /* strlen(".nomedia") */ ) {
strcpy(fileSpot, ".nomedia");
if (access(path, F_OK) == 0) {
LOGV("found .nomedia, setting noMedia flag\n");
noMedia = true;
}
// restore path
fileSpot[0] = 0;
}
DIR* dir = opendir(path);
if (!dir) {
LOGW("Error opening directory '%s', skipping: %s.", path, strerror(errno));
return MEDIA_SCAN_RESULT_SKIPPED;
}
MediaScanResult result = MEDIA_SCAN_RESULT_OK;
while ((entry = readdir(dir))) {
if (doProcessDirectoryEntry(path, pathRemaining, client, noMedia, entry, fileSpot)
== MEDIA_SCAN_RESULT_ERROR) {
result = MEDIA_SCAN_RESULT_ERROR;
break;
}
}
closedir(dir);
return result;
}
MediaScanResult MediaScanner::doProcessDirectoryEntry(
char *path, int pathRemaining, MediaScannerClient &client, bool noMedia,
struct dirent* entry, char* fileSpot) {
struct stat statbuf;
const char* name = entry->d_name;
// ignore "." and ".."
if (name[0] == '.' && (name[1] == 0 || (name[1] == '.' && name[2] == 0))) {
return MEDIA_SCAN_RESULT_SKIPPED;
}
int nameLength = strlen(name);
if (nameLength + 1 > pathRemaining) {
// path too long!
return MEDIA_SCAN_RESULT_SKIPPED;
}
strcpy(fileSpot, name);
int type = entry->d_type;
if (type == DT_UNKNOWN) {
// If the type is unknown, stat() the file instead.
// This is sometimes necessary when accessing NFS mounted filesystems, but
// could be needed in other cases well.
if (stat(path, &statbuf) == 0) {
if (S_ISREG(statbuf.st_mode)) {
type = DT_REG;
} else if (S_ISDIR(statbuf.st_mode)) {
type = DT_DIR;
}
} else {
LOGD("stat() failed for %s: %s", path, strerror(errno) );
}
}
if (type == DT_DIR) {
bool childNoMedia = noMedia;
// set noMedia flag on directories with a name that starts with '.'
// for example, the Mac ".Trashes" directory
if (name[0] == '.')
childNoMedia = true;
// report the directory to the client
if (stat(path, &statbuf) == 0) {
status_t status = client.scanFile(path, statbuf.st_mtime, 0,
true /*isDirectory*/, childNoMedia);
if (status) {
return MEDIA_SCAN_RESULT_ERROR;
}
}
// and now process its contents
strcat(fileSpot, "/");
MediaScanResult result = doProcessDirectory(path, pathRemaining - nameLength - 1,
client, childNoMedia);
if (result == MEDIA_SCAN_RESULT_ERROR) {
return MEDIA_SCAN_RESULT_ERROR;
}
} else if (type == DT_REG) {
stat(path, &statbuf);
status_t status = client.scanFile(path, statbuf.st_mtime, statbuf.st_size,
false /*isDirectory*/, noMedia);
if (status) {
return MEDIA_SCAN_RESULT_ERROR;
}
}
return MEDIA_SCAN_RESULT_OK;
}
} // namespace android
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