status_t MediaScanner::doProcessDirectory(
char *path, int pathRemaining, const char *extensions,
MediaScannerClient &client, ExceptionCheck exceptionCheck,
void *exceptionEnv) {
// place to copy file or directory name
char* fileSpot = path + strlen(path);
struct dirent* entry;
char* tempPathBuffer = NULL;
char* pathBuffer = NULL;
DIR* dir = NULL;
int pathLength = strlen(path);
if (pathLength >= PATH_MAX) {
goto failure;
}
pathBuffer = (char *)malloc(PATH_MAX + 1);
tempPathBuffer = (char *)malloc(PATH_MAX + 1);
if (!pathBuffer || !tempPathBuffer) {
goto failure;
}
strcpy(pathBuffer, path);
// ignore directories that contain a ".nomedia" file
if (pathRemaining >= 8 /* strlen(".nomedia") */ ) {
strcpy(fileSpot, ".nomedia");
if (access(path, F_OK) == 0) {
LOGD("found .nomedia, skipping directory\n");
fileSpot[0] = 0;
client.addNoMediaFolder(path);
goto success;
}
// restore path
fileSpot[0] = 0;
}
dir = opendir(path);
if (!dir) {
LOGD("opendir %s failed, errno: %d", path, errno);
goto failure;
}
while ((entry = readdir(dir))) {
const char* name = entry->d_name;
// ignore "." and ".."
if (name[0] == '.' && (name[1] == 0 || (name[1] == '.' && name[2] == 0))) {
continue;
}
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.
struct stat statbuf;
int tempPathLength = strlen(pathBuffer) + strlen(name);
if (tempPathLength >= PATH_MAX) {
goto failure;
}
strcpy(tempPathBuffer, pathBuffer);
strcat(tempPathBuffer, name);
if (stat(tempPathBuffer, &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: %s", path, name, strerror(errno) );
}
}
if (type == DT_REG || type == DT_DIR) {
int nameLength = strlen(name);
bool isDirectory = (type == DT_DIR);
if (nameLength > pathRemaining || (isDirectory && nameLength + 1 > pathRemaining)) {
// path too long!
continue;
}
strcpy(fileSpot, name);
if (isDirectory) {
// ignore directories with a name that starts with '.'
// for example, the Mac ".Trashes" directory
if (name[0] == '.') continue;
strcat(fileSpot, "/");
int err = doProcessDirectory(path, pathRemaining - nameLength - 1, extensions, client, exceptionCheck, exceptionEnv);
if (err) {
// pass exceptions up - ignore other errors
if (exceptionCheck && exceptionCheck(exceptionEnv)) goto failure;
LOGE("Error processing '%s' - skipping\n", path);
continue;
}
} else if (fileMatchesExtension(path, extensions)) {
struct stat statbuf;
stat(path, &statbuf);
if (statbuf.st_size > 0) {
client.scanFile(path, statbuf.st_mtime, statbuf.st_size);
}
if (exceptionCheck && exceptionCheck(exceptionEnv)) goto failure;
}
}
}
closedir(dir);
success:
free(pathBuffer);
free(tempPathBuffer);
return OK;
failure:
free(pathBuffer);
free(tempPathBuffer);
closedir(dir);
return -1;
}
