libmetrics -- release the shared file lock when closing, handle EINTR.
BUG=chromium-os:11125
TEST=unit tests, tested on device
Change-Id: I126af62f77e4fd0f098d441038f8dc94c0020ac2
Review URL: http://codereview.chromium.org/6576048
diff --git a/metrics/metrics_library.cc b/metrics/metrics_library.cc
index f2046a3..3bc8007 100644
--- a/metrics/metrics_library.cc
+++ b/metrics/metrics_library.cc
@@ -12,6 +12,8 @@
#include <cstdio>
#include <cstring>
+#include <base/eintr_wrapper.h>
+
#define READ_WRITE_ALL_FILE_FLAGS \
(S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)
@@ -130,9 +132,9 @@
if (!AreMetricsEnabled())
return true;
- int chrome_fd = open(uma_events_file_,
- O_WRONLY | O_APPEND | O_CREAT,
- READ_WRITE_ALL_FILE_FLAGS);
+ int chrome_fd = HANDLE_EINTR(open(uma_events_file_,
+ O_WRONLY | O_APPEND | O_CREAT,
+ READ_WRITE_ALL_FILE_FLAGS));
// If we failed to open it, return.
if (chrome_fd < 0) {
PrintError("open", uma_events_file_, errno);
@@ -146,24 +148,20 @@
// Grab an exclusive lock to protect Chrome from truncating
// underneath us. Keep the file locked as briefly as possible.
- if (flock(chrome_fd, LOCK_EX) < 0) {
+ if (HANDLE_EINTR(flock(chrome_fd, LOCK_EX)) < 0) {
PrintError("flock", uma_events_file_, errno);
- close(chrome_fd);
+ HANDLE_EINTR(close(chrome_fd));
return false;
}
bool success = true;
- if (write(chrome_fd, message, length) != length) {
+ if (HANDLE_EINTR(write(chrome_fd, message, length)) != length) {
PrintError("write", uma_events_file_, errno);
success = false;
}
- // Release the file lock and close file.
- if (flock(chrome_fd, LOCK_UN) < 0) {
- PrintError("unlock", uma_events_file_, errno);
- success = false;
- }
- close(chrome_fd);
+ // Close the file and release the lock.
+ HANDLE_EINTR(close(chrome_fd));
return success;
}