From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965734AbaLLIUI (ORCPT ); Fri, 12 Dec 2014 03:20:08 -0500 Received: from terminus.zytor.com ([198.137.202.10]:43250 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965701AbaLLIUE (ORCPT ); Fri, 12 Dec 2014 03:20:04 -0500 Date: Fri, 12 Dec 2014 00:19:24 -0800 From: tip-bot for Arnaldo Carvalho de Melo Message-ID: Cc: paulus@samba.org, tglx@linutronix.de, namhyung@kernel.org, dzickus@redhat.com, acme@redhat.com, eranian@google.com, hpa@zytor.com, mingo@kernel.org, linux-kernel@vger.kernel.org, dsahern@gmail.com, fweisbec@gmail.com, jolsa@redhat.com, adrian.hunter@intel.com, bp@suse.de, efault@gmx.de, peterz@infradead.org Reply-To: eranian@google.com, acme@redhat.com, dzickus@redhat.com, namhyung@kernel.org, tglx@linutronix.de, paulus@samba.org, efault@gmx.de, peterz@infradead.org, bp@suse.de, adrian.hunter@intel.com, jolsa@redhat.com, fweisbec@gmail.com, dsahern@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, hpa@zytor.com To: linux-tip-commits@vger.kernel.org Subject: [tip:perf/urgent] tools lib fs: Add sysctl__read_int helper Git-Commit-ID: 42e3c4a1274d49b42e9d4306ec096b282a6e14aa 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: 42e3c4a1274d49b42e9d4306ec096b282a6e14aa Gitweb: http://git.kernel.org/tip/42e3c4a1274d49b42e9d4306ec096b282a6e14aa Author: Arnaldo Carvalho de Melo AuthorDate: Thu, 11 Dec 2014 13:37:10 -0300 Committer: Arnaldo Carvalho de Melo CommitDate: Thu, 11 Dec 2014 17:53:00 -0300 tools lib fs: Add sysctl__read_int helper Will come in handy for tools, see next patches. Cc: Adrian Hunter Cc: Borislav Petkov Cc: David Ahern Cc: Don Zickus Cc: Frederic Weisbecker Cc: Jiri Olsa Cc: Mike Galbraith Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lkml.kernel.org/n/tip-nay9j62ztxpytt4ew1tkl4op@git.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 b8d0df8..65d9be3 100644 --- a/tools/lib/api/fs/fs.c +++ b/tools/lib/api/fs/fs.c @@ -184,3 +184,16 @@ int filename__read_int(const char *filename, int *value) close(fd); return err; } + +int sysctl__read_int(const char *sysctl, int *value) +{ + char path[PATH_MAX]; + const char *procfs = procfs__mountpoint(); + + if (!procfs) + return -1; + + snprintf(path, sizeof(path), "%s/sys/%s", procfs, sysctl); + + return filename__read_int(path, value); +} diff --git a/tools/lib/api/fs/fs.h b/tools/lib/api/fs/fs.h index 4d0aef6..6caa2bb 100644 --- a/tools/lib/api/fs/fs.h +++ b/tools/lib/api/fs/fs.h @@ -13,4 +13,5 @@ const char *sysfs__mountpoint(void); const char *procfs__mountpoint(void); int filename__read_int(const char *filename, int *value); +int sysctl__read_int(const char *sysctl, int *value); #endif /* __API_FS__ */