From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934292AbcBQMIM (ORCPT ); Wed, 17 Feb 2016 07:08:12 -0500 Received: from terminus.zytor.com ([198.137.202.10]:55859 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934248AbcBQMIJ (ORCPT ); Wed, 17 Feb 2016 07:08:09 -0500 Date: Wed, 17 Feb 2016 04:07:53 -0800 From: tip-bot for Jiri Olsa Message-ID: Cc: mingo@kernel.org, dsahern@gmail.com, linux-kernel@vger.kernel.org, a.p.zijlstra@chello.nl, acme@redhat.com, jolsa@kernel.org, tglx@linutronix.de, hpa@zytor.com, namhyung@kernel.org Reply-To: dsahern@gmail.com, jolsa@kernel.org, acme@redhat.com, linux-kernel@vger.kernel.org, a.p.zijlstra@chello.nl, mingo@kernel.org, tglx@linutronix.de, namhyung@kernel.org, hpa@zytor.com In-Reply-To: <1455465826-8426-4-git-send-email-jolsa@kernel.org> References: <1455465826-8426-4-git-send-email-jolsa@kernel.org> To: linux-tip-commits@vger.kernel.org Subject: [tip:perf/core] tools lib api fs: Add sysfs__read_str function Git-Commit-ID: 51c0396c600f49de9c3ff8f6fd83055de3709c3d X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 51c0396c600f49de9c3ff8f6fd83055de3709c3d Gitweb: http://git.kernel.org/tip/51c0396c600f49de9c3ff8f6fd83055de3709c3d Author: Jiri Olsa AuthorDate: Sun, 14 Feb 2016 17:03:44 +0100 Committer: Arnaldo Carvalho de Melo CommitDate: Tue, 16 Feb 2016 17:12:57 -0300 tools lib api fs: Add sysfs__read_str function Adding sysfs__read_str function to ease up reading string files from sysfs. New interface is: int sysfs__read_str(const char *entry, char **buf, size_t *sizep); Signed-off-by: Jiri Olsa Cc: David Ahern Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1455465826-8426-4-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/lib/api/fs/fs.c | 13 +++++++++++++ tools/lib/api/fs/fs.h | 1 + 2 files changed, 14 insertions(+) diff --git a/tools/lib/api/fs/fs.c b/tools/lib/api/fs/fs.c index 2cbf677..ef78c22 100644 --- a/tools/lib/api/fs/fs.c +++ b/tools/lib/api/fs/fs.c @@ -377,6 +377,19 @@ int sysfs__read_int(const char *entry, int *value) return filename__read_int(path, value); } +int sysfs__read_str(const char *entry, char **buf, size_t *sizep) +{ + char path[PATH_MAX]; + const char *sysfs = sysfs__mountpoint(); + + if (!sysfs) + return -1; + + snprintf(path, sizeof(path), "%s/%s", sysfs, entry); + + return filename__read_str(path, buf, sizep); +} + int sysctl__read_int(const char *sysctl, int *value) { char path[PATH_MAX]; diff --git a/tools/lib/api/fs/fs.h b/tools/lib/api/fs/fs.h index 858922b..9f65980 100644 --- a/tools/lib/api/fs/fs.h +++ b/tools/lib/api/fs/fs.h @@ -32,4 +32,5 @@ int filename__read_str(const char *filename, char **buf, size_t *sizep); int sysctl__read_int(const char *sysctl, int *value); int sysfs__read_int(const char *entry, int *value); int sysfs__read_ull(const char *entry, unsigned long long *value); +int sysfs__read_str(const char *entry, char **buf, size_t *sizep); #endif /* __API_FS__ */