static ssize_t
i_stream_mail_read(struct istream_private *stream)
{
struct mail_istream *mstream = (struct mail_istream *)stream;
size_t size;
ssize_t ret;
i_stream_seek(stream->parent, stream->parent_start_offset +
stream->istream.v_offset);
ret = i_stream_read_copy_from_parent(&stream->istream);
size = i_stream_get_data_size(&stream->istream);
if (ret > 0) {
mstream->mail->transaction->stats.files_read_bytes += ret;
if (!mstream->files_read_increased) {
mstream->files_read_increased = TRUE;
mstream->mail->transaction->stats.files_read_count++;
}
if (mstream->expected_size < stream->istream.v_offset + size) {
i_stream_mail_set_size_corrupted(mstream, size);
return -1;
}
} else if (ret == -1 && stream->istream.eof) {
if (!mstream->input_has_body) {
/* trying to read past the header, but this stream
doesn't have the body */
return -1;
}
if (stream->istream.stream_errno != 0) {
if (stream->istream.stream_errno == ENOENT) {
/* update mail's expunged-flag if needed */
index_mail_refresh_expunged(mstream->mail);
}
return -1;
}
if (i_stream_mail_try_get_cached_size(mstream) &&
mstream->expected_size > stream->istream.v_offset + size) {
i_stream_mail_set_size_corrupted(mstream, size);
return -1;
}
}
return ret;
}
struct istream *i_stream_create_mail(struct mail *mail, struct istream *input,
bool input_has_body)
{
struct mail_istream *mstream;
mstream = i_new(struct mail_istream, 1);
mstream->mail = mail;
mstream->input_has_body = input_has_body;
mstream->expected_size = (uoff_t)-1;
(void)i_stream_mail_try_get_cached_size(mstream);
mstream->istream.max_buffer_size = input->real_stream->max_buffer_size;
mstream->istream.stream_size_passthrough = TRUE;
mstream->istream.read = i_stream_mail_read;
mstream->istream.istream.blocking = input->blocking;
mstream->istream.istream.seekable = input->seekable;
return i_stream_create(&mstream->istream, input,
i_stream_get_fd(input));
}
