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/* Copyright (c) 2011-2018 Dovecot authors, see the included COPYING file */
#include "lib.h"
#include "ostream.h"
#include "iostream-rawlog-private.h"
#include "istream-private.h"
#include "istream-rawlog.h"
struct rawlog_istream {
struct istream_private istream;
struct rawlog_iostream riostream;
};
static void i_stream_rawlog_close(struct iostream_private *stream,
bool close_parent)
{
struct rawlog_istream *rstream =
container_of(stream, struct rawlog_istream, istream.iostream);
iostream_rawlog_close(&rstream->riostream);
if (close_parent)
i_stream_close(rstream->istream.parent);
}
static void i_stream_rawlog_destroy(struct iostream_private *stream)
{
struct rawlog_istream *rstream =
container_of(stream, struct rawlog_istream, istream.iostream);
uoff_t v_offset;
v_offset = rstream->istream.parent_start_offset +
rstream->istream.istream.v_offset;
if (rstream->istream.parent->seekable ||
v_offset > rstream->istream.parent->v_offset) {
/* get to same position in parent stream */
i_stream_seek(rstream->istream.parent, v_offset);
}
}
static ssize_t i_stream_rawlog_read(struct istream_private *stream)
{
struct rawlog_istream *rstream =
container_of(stream, struct rawlog_istream, istream);
ssize_t ret;
size_t pos;
i_stream_seek(stream->parent, rstream->istream.parent_start_offset +
stream->istream.v_offset);
stream->pos -= stream->skip;
stream->skip = 0;
stream->buffer = i_stream_get_data(stream->parent, &pos);
if (pos > stream->pos)
ret = 0;
else do {
ret = i_stream_read_memarea(stream->parent);
stream->istream.stream_errno = stream->parent->stream_errno;
stream->istream.eof = stream->parent->eof;
stream->buffer = i_stream_get_data(stream->parent, &pos);
} while (pos <= stream->pos && ret > 0);
if (ret == -2)
return -2;
if (pos <= stream->pos)
ret = ret == 0 ? 0 : -1;
else {
ret = (ssize_t)(pos - stream->pos);
iostream_rawlog_write(&rstream->riostream,
stream->buffer + stream->pos, ret);
}
stream->pos = pos;
i_assert(ret != -1 || stream->istream.eof ||
stream->istream.stream_errno != 0);
return ret;
}
struct istream *
i_stream_create_rawlog(struct istream *input, const char *rawlog_path,
int rawlog_fd, enum iostream_rawlog_flags flags)
{
struct ostream *rawlog_output;
bool autoclose_fd = (flags & IOSTREAM_RAWLOG_FLAG_AUTOCLOSE) != 0;
i_assert(rawlog_path != NULL);
i_assert(rawlog_fd != -1);
rawlog_output = autoclose_fd ?
o_stream_create_fd_autoclose(&rawlog_fd, 0) :
o_stream_create_fd(rawlog_fd, 0);
o_stream_set_name(rawlog_output,
t_strdup_printf("rawlog(%s)", rawlog_path));
return i_stream_create_rawlog_from_stream(input, rawlog_output, flags);
}
struct istream *
i_stream_create_rawlog_from_stream(struct istream *input,
struct ostream *rawlog_output,
enum iostream_rawlog_flags flags)
{
struct rawlog_istream *rstream;
rstream = i_new(struct rawlog_istream, 1);
rstream->istream.max_buffer_size = input->real_stream->max_buffer_size;
rstream->istream.stream_size_passthrough = TRUE;
rstream->riostream.rawlog_output = rawlog_output;
iostream_rawlog_init(&rstream->riostream, flags, TRUE);
rstream->istream.read = i_stream_rawlog_read;
rstream->istream.iostream.close = i_stream_rawlog_close;
rstream->istream.iostream.destroy = i_stream_rawlog_destroy;
rstream->istream.istream.readable_fd = input->readable_fd;
rstream->istream.istream.blocking = input->blocking;
rstream->istream.istream.seekable = input->seekable;
return i_stream_create(&rstream->istream, input,
i_stream_get_fd(input), 0);
}
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