From: tip-bot for Jiri Olsa <tipbot@zytor.com>
To: linux-tip-commits@vger.kernel.org
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
Subject: [tip:perf/core] tools lib api fs: Add sysfs__read_str function
Date: Wed, 17 Feb 2016 04:07:53 -0800 [thread overview]
Message-ID: <tip-51c0396c600f49de9c3ff8f6fd83055de3709c3d@git.kernel.org> (raw)
In-Reply-To: <1455465826-8426-4-git-send-email-jolsa@kernel.org>
Commit-ID: 51c0396c600f49de9c3ff8f6fd83055de3709c3d
Gitweb: http://git.kernel.org/tip/51c0396c600f49de9c3ff8f6fd83055de3709c3d
Author: Jiri Olsa <jolsa@kernel.org>
AuthorDate: Sun, 14 Feb 2016 17:03:44 +0100
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
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 <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1455465826-8426-4-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
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__ */
next prev parent reply other threads:[~2016-02-17 12:08 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-14 16:03 [PATCH 0/5] perf tools: Store CPU cache details under perf data Jiri Olsa
2016-02-14 16:03 ` [PATCH 1/5] tools lib api: Add debug output support Jiri Olsa
2016-02-17 12:07 ` [tip:perf/core] " tip-bot for Jiri Olsa
2016-02-14 16:03 ` [PATCH 2/5] tools lib api fs: Move filename__read_str into api/fs/fs.c Jiri Olsa
2016-02-17 12:07 ` [tip:perf/core] tools lib api fs: Adopt filename__read_str from perf tip-bot for Jiri Olsa
2016-02-14 16:03 ` [PATCH 3/5] tools lib api fs: Add sysfs__read_str function Jiri Olsa
2016-02-17 12:07 ` tip-bot for Jiri Olsa [this message]
2016-02-14 16:03 ` [PATCH 4/5] perf tools: Initialize libapi debug output Jiri Olsa
2016-02-17 12:08 ` [tip:perf/core] " tip-bot for Jiri Olsa
2016-02-14 16:03 ` [PATCH 5/5] perf tools: Add perf data cache feature Jiri Olsa
2016-02-16 12:11 ` [PATCHv2 " Jiri Olsa
2016-02-16 14:22 ` Namhyung Kim
2016-02-16 15:01 ` [PATCHv3 " Jiri Olsa
2016-02-16 15:29 ` Arnaldo Carvalho de Melo
2016-02-16 15:48 ` Arnaldo Carvalho de Melo
2016-02-17 12:08 ` [tip:perf/core] " tip-bot for Jiri Olsa
2016-02-16 8:14 ` [PATCH 0/5] perf tools: Store CPU cache details under perf data Ingo Molnar
2016-02-16 11:28 ` Jiri Olsa
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