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authorArnaldo Carvalho de Melo <acme@redhat.com>2014-12-11 19:37:10 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2014-12-11 23:53:00 +0300
commit42e3c4a1274d49b42e9d4306ec096b282a6e14aa (patch)
treef87fd0437839d08c4b6fc1bbdfddfc5b278e362c /tools/lib
parent3a351127cbc682c3a0ae7383c4ff6fd0e8fee83c (diff)
downloadlinux-42e3c4a1274d49b42e9d4306ec096b282a6e14aa.tar.xz
tools lib fs: Add sysctl__read_int helper
Will come in handy for tools, see next patches. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-nay9j62ztxpytt4ew1tkl4op@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/lib')
-rw-r--r--tools/lib/api/fs/fs.c13
-rw-r--r--tools/lib/api/fs/fs.h1
2 files changed, 14 insertions, 0 deletions
diff --git a/tools/lib/api/fs/fs.c b/tools/lib/api/fs/fs.c
index b8d0df8878d1..65d9be3f9887 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 4d0aef6e7163..6caa2bbc6cec 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__ */