doveadm: Do not crash doveadm-server if input file missing

save commands expects valid input file for it to work,
if we are not running for cli, and input file is not
provided, provide EINVAL error to caller via i_stream_error.

diff --git a/src/doveadm/doveadm-mail.c b/src/doveadm/doveadm-mail.c
index b9383fb126b780c11fd8d705d066afb36b068b4b..50e6e57f9ac985b3ba03be7848be486366b2d65b 100644 (file)
--- a/src/doveadm/doveadm-mail.c
+++ b/src/doveadm/doveadm-mail.c
@@ -227,6 +227,11 @@ void doveadm_mail_get_input(struct doveadm_mail_cmd_context *ctx)
        if (ctx->cmd_input != NULL)
                return;
 
+       if (!ctx->cli && ctx->conn == NULL) {
+               ctx->cmd_input = i_stream_create_error_str(EINVAL, "Input stream missing (provide with file parameter)");
+               return;
+       }
+
        if (ctx->conn != NULL)
                inputs[0] = i_stream_create_dot(ctx->conn->input, FALSE);
        else {