imapc: If remote server disconnects, log the reason.

diff --git a/src/lib-imap-client/imapc-connection.c b/src/lib-imap-client/imapc-connection.c
index 590de51cab3e13a548f3d90ec92eef86569d23f6..a9b15a6059e4bb1c1ef9d93ef5628194bcb5bb9b 100644 (file)
--- a/src/lib-imap-client/imapc-connection.c
+++ b/src/lib-imap-client/imapc-connection.c
@@ -1108,8 +1108,12 @@ static void imapc_connection_input(struct imapc_connection *conn)
                                conn->name);
                } else if (!conn->handshake_failed) {
                        errstr = ssl_iostream_get_last_error(conn->ssl_iostream);
+                       if (errstr == NULL) {
+                               errstr = conn->input->stream_errno == 0 ? "EOF" :
+                                       strerror(conn->input->stream_errno);
+                       }
                        i_error("imapc(%s): Server disconnected: %s",
-                               conn->name, errstr != NULL ? errstr : "");
+                               conn->name, errstr);
                }
                imapc_connection_reconnect(conn);
        }