static gboolean
dispatch_set_read_source (OstreeRepo *repo,
StaticDeltaExecutionState *state,
GCancellable *cancellable,
GError **error)
{
gboolean ret = FALSE;
guint64 source_offset;
if (state->read_source_fd)
{
(void) close (state->read_source_fd);
state->read_source_fd = -1;
}
if (!read_varuint64 (state, &source_offset, error))
goto out;
if (!validate_ofs (state, source_offset, 32, error))
goto out;
g_free (state->read_source_object);
state->read_source_object = ostree_checksum_from_bytes (state->payload_data + source_offset);
if (!_ostree_repo_read_bare_fd (repo, state->read_source_object, &state->read_source_fd,
cancellable, error))
goto out;
ret = TRUE;
out:
if (!ret)
g_prefix_error (error, "opcode set-read-source: ");
return ret;
}
static gboolean
dispatch_write (OstreeRepo *repo,
StaticDeltaExecutionState *state,
GCancellable *cancellable,
GError **error)
{
gboolean ret = FALSE;
guint64 content_size;
guint64 content_offset;
if (!read_varuint64 (state, &content_size, error))
goto out;
if (!read_varuint64 (state, &content_offset, error))
goto out;
if (state->stats_only)
{
ret = TRUE;
goto out;
}
if (!state->have_obj)
{
if (state->read_source_fd != -1)
{
if (lseek (state->read_source_fd, content_offset, SEEK_SET) == -1)
{
glnx_set_error_from_errno (error);
goto out;
}
while (content_size > 0)
{
char buf[4096];
gssize bytes_read;
do
bytes_read = read (state->read_source_fd, buf, MIN(sizeof(buf), content_size));
while (G_UNLIKELY (bytes_read == -1 && errno == EINTR));
if (bytes_read == -1)
{
glnx_set_error_from_errno (error);
goto out;
}
if (G_UNLIKELY (bytes_read == 0))
{
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
"Unexpected EOF reading object %s", state->read_source_object);
goto out;
}
if (!content_out_write (repo, state, (guint8*)buf, bytes_read,
cancellable, error))
goto out;
content_size -= bytes_read;
}
}
else
{
if (!validate_ofs (state, content_offset, content_size, error))
goto out;
if (!content_out_write (repo, state, state->payload_data + content_offset, content_size,
cancellable, error))
goto out;
}
}
ret = TRUE;
out:
if (!ret)
g_prefix_error (error, "opcode open-splice-and-close: ");
return ret;
}
static gboolean
dispatch_open_splice_and_close (OstreeRepo *repo,
StaticDeltaExecutionState *state,
GCancellable *cancellable,
GError **error)
{
gboolean ret = FALSE;
if (!open_output_target (state, cancellable, error))
goto out;
if (OSTREE_OBJECT_TYPE_IS_META (state->output_objtype))
{
g_autoptr(GVariant) metadata = NULL;
guint64 offset;
guint64 length;
if (!read_varuint64 (state, &length, error))
goto out;
if (!read_varuint64 (state, &offset, error))
goto out;
if (!validate_ofs (state, offset, length, error))
goto out;
if (state->stats_only)
{
ret = TRUE;
goto out;
}
metadata = g_variant_new_from_data (ostree_metadata_variant_type (state->output_objtype),
state->payload_data + offset, length, TRUE, NULL, NULL);
{
g_autofree guchar *actual_csum = NULL;
if (!ostree_repo_write_metadata (state->repo, state->output_objtype,
state->checksum,
metadata, &actual_csum,
cancellable,
error))
goto out;
}
}
else
{
guint64 content_offset;
guint64 objlen;
g_autoptr(GInputStream) object_input = NULL;
g_autoptr(GInputStream) memin = NULL;
if (!do_content_open_generic (repo, state, cancellable, error))
goto out;
if (!read_varuint64 (state, &state->content_size, error))
goto out;
if (!read_varuint64 (state, &content_offset, error))
goto out;
if (!validate_ofs (state, content_offset, state->content_size, error))
goto out;
if (state->stats_only)
{
ret = TRUE;
goto out;
}
/* Fast path for regular files to bare repositories */
if (S_ISREG (state->mode) &&
(repo->mode == OSTREE_REPO_MODE_BARE ||
repo->mode == OSTREE_REPO_MODE_BARE_USER))
{
if (!_ostree_repo_open_content_bare (repo, state->checksum,
state->content_size,
&state->barecommitstate,
&state->content_out,
&state->have_obj,
cancellable, error))
goto out;
if (!state->have_obj)
{
if (!handle_untrusted_content_checksum (repo, state, cancellable, error))
goto out;
if (!content_out_write (repo, state,
state->payload_data + content_offset,
state->content_size,
cancellable, error))
goto out;
}
}
else
{
/* Slower path, for symlinks and unpacking deltas into archive-z2 */
g_autoptr(GFileInfo) finfo = NULL;
finfo = _ostree_header_gfile_info_new (state->mode, state->uid, state->gid);
if (S_ISLNK (state->mode))
{
g_autofree char *nulterminated_target =
g_strndup ((char*)state->payload_data + content_offset, state->content_size);
g_file_info_set_symlink_target (finfo, nulterminated_target);
}
else
{
g_assert (S_ISREG (state->mode));
g_file_info_set_size (finfo, state->content_size);
memin = g_memory_input_stream_new_from_data (state->payload_data + content_offset, state->content_size, NULL);
}
if (!ostree_raw_file_to_content_stream (memin, finfo, state->xattrs,
&object_input, &objlen,
cancellable, error))
goto out;
{
g_autofree guchar *actual_csum = NULL;
if (!ostree_repo_write_content (state->repo,
state->checksum,
object_input,
objlen,
&actual_csum,
cancellable,
error))
goto out;
}
}
}
if (!dispatch_close (repo, state, cancellable, error))
goto out;
ret = TRUE;
out:
if (state->stats_only)
(void) dispatch_close (repo, state, cancellable, NULL);
if (!ret)
g_prefix_error (error, "opcode open-splice-and-close: ");
return ret;
}