Find device-dependent disk stats file, and skip disk stats if not available.
Change-Id: I03afb85e3357dd4c2cf5effd98b194c71d77c71d
BUG=12171
TEST=unit tested
Review URL: http://codereview.chromium.org/6541007
diff --git a/metrics/metrics_daemon.cc b/metrics/metrics_daemon.cc
index 1e15e1d..4820590 100644
--- a/metrics/metrics_daemon.cc
+++ b/metrics/metrics_daemon.cc
@@ -146,8 +146,7 @@
session_state_(kUnknownSessionState),
user_active_(false),
usemon_interval_(0),
- usemon_source_(NULL),
- diskstats_path_(NULL) {}
+ usemon_source_(NULL) {}
MetricsDaemon::~MetricsDaemon() {
DeleteFrequencyCounters();
@@ -215,7 +214,7 @@
}
void MetricsDaemon::Init(bool testing, MetricsLibraryInterface* metrics_lib,
- const char* diskstats_path) {
+ string diskstats_path) {
testing_ = testing;
DCHECK(metrics_lib != NULL);
metrics_lib_ = metrics_lib;
@@ -243,8 +242,11 @@
ConfigureCrashFrequencyReporter(kMetricUserCrashesDailyName);
ConfigureCrashFrequencyReporter(kMetricUserCrashesWeeklyName);
- diskstats_path_ = diskstats_path;
- DiskStatsReporterInit();
+ // Don't attempt to collect disk stats if there is no disk stats file.
+ if (!diskstats_path.empty()) {
+ diskstats_path_ = diskstats_path;
+ DiskStatsReporterInit();
+ }
// Don't setup D-Bus and GLib in test mode.
if (testing)
@@ -541,7 +543,7 @@
int nchars;
int nitems;
char line[200];
- int file = HANDLE_EINTR(open(diskstats_path_, O_RDONLY));
+ int file = HANDLE_EINTR(open(diskstats_path_.c_str(), O_RDONLY));
if (file < 0) {
PLOG(WARNING) << "cannot open " << diskstats_path_;
return;