doveadm-server: Fix hang when flushing print output and client disconnects

diff --git a/src/doveadm/doveadm-print-server.c b/src/doveadm/doveadm-print-server.c
index ec3c7ed524b50ed03dc15a5c3c6b13282fcf924e..86688231fd6aa7fd7d5691a36dbf3f90b7073282 100644 (file)
--- a/src/doveadm/doveadm-print-server.c
+++ b/src/doveadm/doveadm-print-server.c
@@ -88,7 +88,8 @@ static void doveadm_print_server_flush(void)
                       str_data(ctx.str), str_len(ctx.str));
        str_truncate(ctx.str, 0);
 
-       if (o_stream_get_buffer_used_size(doveadm_print_ostream) < IO_BLOCK_SIZE)
+       if (o_stream_get_buffer_used_size(doveadm_print_ostream) < IO_BLOCK_SIZE ||
+           doveadm_print_ostream->stream_errno != 0)
                return;
        /* Wait until buffer is flushed to avoid it growing too large */
        struct ioloop *prev_loop = current_ioloop;