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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2014-12-11 13:37:10 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2014-12-11 17:53:00 -0300 |
| commit | 42e3c4a1274d49b42e9d4306ec096b282a6e14aa (patch) | |
| tree | f87fd0437839d08c4b6fc1bbdfddfc5b278e362c | |
| parent | 3a351127cbc682c3a0ae7383c4ff6fd0e8fee83c (diff) | |
| download | blackbird-op-linux-42e3c4a1274d49b42e9d4306ec096b282a6e14aa.tar.gz blackbird-op-linux-42e3c4a1274d49b42e9d4306ec096b282a6e14aa.zip | |
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>
| -rw-r--r-- | tools/lib/api/fs/fs.c | 13 | ||||
| -rw-r--r-- | tools/lib/api/fs/fs.h | 1 |
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__ */ |
