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Thu, 23 Jul 2020 07:58:52 -0400 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-368--Zs-FgOqMWaGcIecrmpCsg-1; Thu, 23 Jul 2020 07:58:48 -0400 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 85C4A19067E0; Thu, 23 Jul 2020 11:58:47 +0000 (UTC) Received: from blackfin.pond.sub.org (ovpn-112-143.ams2.redhat.com [10.36.112.143]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 58F836FEF4; Thu, 23 Jul 2020 11:58:47 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id EAAF110F5AF1; Thu, 23 Jul 2020 13:58:45 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1595505530; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=uzDoCvg9nLyfzOPU0R2wSrPPyi2ccYi5UrlWBzflzTY=; b=BHNyTPBvTyQOTo/IDqwbHTqc7yGscMjeOW6XrKggMVojZy3p8yz/qncVo9ApjrNKo+8jwS RP/ISAQGbkRY3mdmQI5Y2uG1v9SQnk6dr1F9zJ58WdvDQErOiqSzjVOzoTy5F/M7zOsuTG MBs5hZdJczigYjQEKbz0CEwLHhGckBM= X-MC-Unique: -Zs-FgOqMWaGcIecrmpCsg-1 From: Markus Armbruster To: qemu-devel@nongnu.org Subject: [PATCH for-5.1 2/2] tpm: Improve help on TPM types when none are available Date: Thu, 23 Jul 2020 13:58:45 +0200 Message-Id: <20200723115845.1865886-3-armbru@redhat.com> In-Reply-To: <20200723115845.1865886-1-armbru@redhat.com> References: <20200723115845.1865886-1-armbru@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=205.139.110.61; envelope-from=armbru@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/23 02:33:29 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -40 X-Spam_score: -4.1 X-Spam_bar: ---- X-Spam_report: (-4.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: philmd@redhat.com, stefanb@linux.ibm.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" Help is a bit awkward when no TPM types are built into QEMU: $ upstream-qemu -tpmdev nonexistent,id=3Dtpm0 upstream-qemu: -tpmdev nonexistent,id=3Dtpm0: Parameter 'type' expects = a TPM backend type Supported TPM types (choose only one): Improve to upstream-qemu: -tpmdev nonexistent,id=3Dtpm0: Parameter 'type' expects = a TPM backend type No TPM backend types are available Signed-off-by: Markus Armbruster Reviewed-by: Philippe Mathieu-Daud=C3=A9 Reviewed-by: Stefan Berger --- tpm.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/tpm.c b/tpm.c index f6045bb6da..cab206355a 100644 --- a/tpm.c +++ b/tpm.c @@ -47,18 +47,23 @@ tpm_be_find_by_type(enum TpmType type) */ static void tpm_display_backend_drivers(void) { + bool got_one =3D false; int i; =20 - fprintf(stderr, "Supported TPM types (choose only one):\n"); - for (i =3D 0; i < TPM_TYPE__MAX; i++) { const TPMBackendClass *bc =3D tpm_be_find_by_type(i); if (!bc) { continue; } - fprintf(stderr, "%12s %s\n", TpmType_str(i), bc->desc); + if (!got_one) { + error_printf("Supported TPM types (choose only one):\n"); + got_one =3D true; + } + error_printf("%12s %s\n", TpmType_str(i), bc->desc); + } + if (!got_one) { + error_printf("No TPM backend types are available\n"); } - fprintf(stderr, "\n"); } =20 /* --=20 2.26.2