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Commit b9835a90 authored by Alexander Shishkin's avatar Alexander Shishkin Committed by Arnaldo Carvalho de Melo
Browse files

tools lib api fs: Introduce sysfs__read_bool 



Will be used in a upcoming patch warning about PERF_RECORD_AUX data
gaps, reading the "module/kvm_intel/parameters/vmm_exclusive" sysfs
entry.

Signed-off-by: default avatarAlexander Shishkin <alexander.shishkin@linux.intel.com>
Tested-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vince@deater.net>
Link: http://lkml.kernel.org/r/8760j941ig.fsf@ashishki-desk.ger.corp.intel.com


[ split from a larger patch ]
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent f371594a

tools/lib/api/fs/fs.c

+29 −0
Original line number Diff line number Diff line
@@ -439,6 +439,35 @@ int sysfs__read_str(const char *entry, char **buf, size_t *sizep) 
	return filename__read_str(path, buf, sizep);

}



int sysfs__read_bool(const char *entry, bool *value)

{

	char *buf;

	size_t size;

	int ret;



	ret = sysfs__read_str(entry, &buf, &size);

	if (ret < 0)

		return ret;



	switch (buf[0]) {

	case '1':

	case 'y':

	case 'Y':

		*value = true;

		break;

	case '0':

	case 'n':

	case 'N':

		*value = false;

		break;

	default:

		ret = -1;

	}



	free(buf);



	return ret;

}

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
@@ -37,4 +37,5 @@ 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);

int sysfs__read_bool(const char *entry, bool *value);

#endif /* __API_FS__ */