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tools lib fs: Add sysctl__read_int helper

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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>
This commit is contained in:
Arnaldo Carvalho de Melo 2014-12-11 13:37:10 -03:00
parent 3a351127cb
commit 42e3c4a127
2 changed files with 14 additions and 0 deletions
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13
tools/lib/api/fs/fs.c
View File

@ -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);
}

1
tools/lib/api/fs/fs.h
View File

@ -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__ */