From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E3E0FECDE32 for ; Wed, 17 Oct 2018 10:21:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A34F12150D for ; Wed, 17 Oct 2018 10:21:04 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A34F12150D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=cn.fujitsu.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727064AbeJQSQD (ORCPT ); Wed, 17 Oct 2018 14:16:03 -0400 Received: from mail.cn.fujitsu.com ([183.91.158.132]:62672 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726727AbeJQSQD (ORCPT ); Wed, 17 Oct 2018 14:16:03 -0400 X-IronPort-AV: E=Sophos;i="5.43,368,1503331200"; d="scan'208";a="46265542" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 17 Oct 2018 18:20:59 +0800 Received: from G08CNEXCHPEKD01.g08.fujitsu.local (unknown [10.167.33.80]) by cn.fujitsu.com (Postfix) with ESMTP id 422E04B6ED69; Wed, 17 Oct 2018 18:20:58 +0800 (CST) Received: from localhost.localdomain (10.167.225.56) by G08CNEXCHPEKD01.g08.fujitsu.local (10.167.33.89) with Microsoft SMTP Server (TLS) id 14.3.408.0; Wed, 17 Oct 2018 18:21:03 +0800 From: Chao Fan To: , , , , , , , , , , CC: , , Subject: [PATCH v9 1/8] x86/boot: Introduce cmdline_find_option_arg()to detect if option=arg in cmdline Date: Wed, 17 Oct 2018 18:20:05 +0800 Message-ID: <20181017102012.872-2-fanc.fnst@cn.fujitsu.com> X-Mailer: git-send-email 2.17.2 In-Reply-To: <20181017102012.872-1-fanc.fnst@cn.fujitsu.com> References: <20181017102012.872-1-fanc.fnst@cn.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.167.225.56] X-yoursite-MailScanner-ID: 422E04B6ED69.AD118 X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: fanc.fnst@cn.fujitsu.com Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Introduce a new function cmdline_find_option_arg() to detect whether option is in command line and the value is arg. Signed-off-by: Chao Fan --- arch/x86/boot/compressed/cmdline.c | 15 +++++++++++++++ arch/x86/boot/compressed/misc.h | 1 + 2 files changed, 16 insertions(+) diff --git a/arch/x86/boot/compressed/cmdline.c b/arch/x86/boot/compressed/cmdline.c index af6cda0b7900..61118c69feb8 100644 --- a/arch/x86/boot/compressed/cmdline.c +++ b/arch/x86/boot/compressed/cmdline.c @@ -1,5 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 #include "misc.h" +#define STATIC +#include #if CONFIG_EARLY_PRINTK || CONFIG_RANDOMIZE_BASE || CONFIG_X86_5LEVEL @@ -30,5 +32,18 @@ int cmdline_find_option_bool(const char *option) { return __cmdline_find_option_bool(get_cmd_line_ptr(), option); } +bool cmdline_find_option_arg(const char *option, const char *arg, int argsize) +{ + char *buffer = malloc(argsize+1); + bool find = false; + int ret; + + ret = cmdline_find_option(option, buffer, argsize+1); + if (ret == argsize && !strncmp(buffer, arg, argsize)) + find = true; + + free(buffer); + return find; +} #endif diff --git a/arch/x86/boot/compressed/misc.h b/arch/x86/boot/compressed/misc.h index a1d5918765f3..008fdc47a29c 100644 --- a/arch/x86/boot/compressed/misc.h +++ b/arch/x86/boot/compressed/misc.h @@ -67,6 +67,7 @@ static inline void debug_puthex(const char *s) /* cmdline.c */ int cmdline_find_option(const char *option, char *buffer, int bufsize); int cmdline_find_option_bool(const char *option); +bool cmdline_find_option_arg(const char *option, const char *arg, int argsize); #endif -- 2.17.2