From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753613AbcD0Phl (ORCPT ); Wed, 27 Apr 2016 11:37:41 -0400 Received: from terminus.zytor.com ([198.137.202.10]:51306 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753153AbcD0Phh (ORCPT ); Wed, 27 Apr 2016 11:37:37 -0400 Date: Wed, 27 Apr 2016 08:37:09 -0700 From: tip-bot for Arnaldo Carvalho de Melo Message-ID: Cc: namhyung@kernel.org, mingo@kernel.org, bp@suse.de, acme@redhat.com, hpa@zytor.com, milian.wolff@kdab.com, linux-kernel@vger.kernel.org, tglx@linutronix.de, dsahern@gmail.com, adrian.hunter@intel.com, jolsa@kernel.org, wangnan0@huawei.com Reply-To: hpa@zytor.com, linux-kernel@vger.kernel.org, dsahern@gmail.com, tglx@linutronix.de, milian.wolff@kdab.com, namhyung@kernel.org, mingo@kernel.org, acme@redhat.com, bp@suse.de, wangnan0@huawei.com, adrian.hunter@intel.com, jolsa@kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip:perf/core] tools lib api fs: Add helper to read string from procfs file Git-Commit-ID: 4bd112df3eea4db63fe90fb4e83c48d3f3bd6512 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: 4bd112df3eea4db63fe90fb4e83c48d3f3bd6512 Gitweb: http://git.kernel.org/tip/4bd112df3eea4db63fe90fb4e83c48d3f3bd6512 Author: Arnaldo Carvalho de Melo AuthorDate: Tue, 26 Apr 2016 12:31:16 -0300 Committer: Arnaldo Carvalho de Melo CommitDate: Tue, 26 Apr 2016 13:15:00 -0300 tools lib api fs: Add helper to read string from procfs file To read things like /proc/self/comm. Cc: Adrian Hunter Cc: Borislav Petkov Cc: David Ahern Cc: Jiri Olsa Cc: Milian Wolff Cc: Namhyung Kim Cc: Wang Nan Link: http://lkml.kernel.org/n/tip-ztpkbmseidt0hq2psr46o0h9@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/lib/api/fs/fs.c | 13 +++++++++++++ tools/lib/api/fs/fs.h | 2 ++ 2 files changed, 15 insertions(+) diff --git a/tools/lib/api/fs/fs.c b/tools/lib/api/fs/fs.c index ef78c22..08556cf 100644 --- a/tools/lib/api/fs/fs.c +++ b/tools/lib/api/fs/fs.c @@ -351,6 +351,19 @@ int filename__read_str(const char *filename, char **buf, size_t *sizep) return err; } +int procfs__read_str(const char *entry, char **buf, size_t *sizep) +{ + char path[PATH_MAX]; + const char *procfs = procfs__mountpoint(); + + if (!procfs) + return -1; + + snprintf(path, sizeof(path), "%s/%s", procfs, entry); + + return filename__read_str(path, buf, sizep); +} + int sysfs__read_ull(const char *entry, unsigned long long *value) { char path[PATH_MAX]; diff --git a/tools/lib/api/fs/fs.h b/tools/lib/api/fs/fs.h index 9f65980..16c9c2e 100644 --- a/tools/lib/api/fs/fs.h +++ b/tools/lib/api/fs/fs.h @@ -29,6 +29,8 @@ int filename__read_int(const char *filename, int *value); int filename__read_ull(const char *filename, unsigned long long *value); int filename__read_str(const char *filename, char **buf, size_t *sizep); +int procfs__read_str(const char *entry, 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);