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=-1.0 required=3.0 tests=MAILING_LIST_MULTI,SPF_PASS 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 D9DA5C43615 for ; Fri, 17 Aug 2018 09:48:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 98343218AA for ; Fri, 17 Aug 2018 09:48:38 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 98343218AA Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org 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 S1727415AbeHQMvU (ORCPT ); Fri, 17 Aug 2018 08:51:20 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:55976 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727345AbeHQMvT (ORCPT ); Fri, 17 Aug 2018 08:51:19 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id BA86440201C4; Fri, 17 Aug 2018 09:48:34 +0000 (UTC) Received: from krava.brq.redhat.com (unknown [10.43.17.209]) by smtp.corp.redhat.com (Postfix) with ESMTP id 4D85C1746E; Fri, 17 Aug 2018 09:48:33 +0000 (UTC) From: Jiri Olsa To: Arnaldo Carvalho de Melo Cc: lkml , Ingo Molnar , Namhyung Kim , David Ahern , Alexander Shishkin , Peter Zijlstra , Michael Petlan Subject: [PATCH 11/13] perf tools: Add lzma_is_compressed function Date: Fri, 17 Aug 2018 11:48:11 +0200 Message-Id: <20180817094813.15086-12-jolsa@kernel.org> In-Reply-To: <20180817094813.15086-1-jolsa@kernel.org> References: <20180817094813.15086-1-jolsa@kernel.org> X-Scanned-By: MIMEDefang 2.79 on 10.11.54.5 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.6]); Fri, 17 Aug 2018 09:48:34 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.6]); Fri, 17 Aug 2018 09:48:34 +0000 (UTC) for IP:'10.11.54.5' DOMAIN:'int-mx05.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'jolsa@kernel.org' RCPT:'' Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add implementation of the is_compressed callback for lzma. Link: http://lkml.kernel.org/n/tip-tdgpdhdfk7sm5hsyjvfs2skh@git.kernel.org Signed-off-by: Jiri Olsa --- tools/perf/util/lzma.c | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-) diff --git a/tools/perf/util/lzma.c b/tools/perf/util/lzma.c index 7032caaf75eb..b1dd29a9d915 100644 --- a/tools/perf/util/lzma.c +++ b/tools/perf/util/lzma.c @@ -3,9 +3,13 @@ #include #include #include +#include +#include +#include #include "compress.h" #include "util.h" #include "debug.h" +#include #define BUFSIZE 8192 @@ -100,7 +104,18 @@ int lzma_decompress_to_file(const char *input, int output_fd) return err; } -bool lzma_is_compressed(const char *input __maybe_unused) +bool lzma_is_compressed(const char *input) { - return true; + int fd = open(input, O_RDONLY); + const uint8_t magic[6] = { 0xFD, '7', 'z', 'X', 'Z', 0x00 }; + char buf[6] = { 0 }; + ssize_t rc; + + if (fd < 0) + return -1; + + rc = read(fd, buf, sizeof(buf)); + close(fd); + return rc == sizeof(buf) ? + memcmp(buf, magic, sizeof(buf)) == 0 : false; } -- 2.17.1