Commit-ID: 51c0396c600f49de9c3ff8f6fd83055de3709c3d
Gitweb: http://git.kernel.org/tip/51c0396c600f49de9c3ff8f6fd83055de3709c3d
Author: Jiri Olsa <jolsa@xxxxxxxxxx>
AuthorDate: Sun, 14 Feb 2016 17:03:44 +0100
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
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@xxxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Link: http://lkml.kernel.org/r/1455465826-8426-4-git-send-email-jolsa@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
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__ */
--
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