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Commit 51c0396c authored by Jiri Olsa's avatar Jiri Olsa Committed by Arnaldo Carvalho de Melo
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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: default avatarJiri 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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 607bfbd7

tools/lib/api/fs/fs.c

+13 −0
Original line number Diff line number Diff line
@@ -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];

tools/lib/api/fs/fs.h

+1 −0
Original line number Diff line number Diff line
@@ -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__ */