Collect and send kernel crash diagnostics
BUG=1512,1914
Review URL: http://codereview.chromium.org/3179006
diff --git a/crash_reporter/crash_collector.cc b/crash_reporter/crash_collector.cc
new file mode 100644
index 0000000..492f2e8
--- /dev/null
+++ b/crash_reporter/crash_collector.cc
@@ -0,0 +1,150 @@
+// Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "crash-reporter/crash_collector.h"
+
+#include <pwd.h> // For struct passwd.
+#include <sys/types.h> // for mode_t.
+
+#include "base/file_util.h"
+#include "base/logging.h"
+#include "base/string_util.h"
+#include "crash-reporter/system_logging.h"
+
+static const char kDefaultUserName[] = "chronos";
+static const char kSystemCrashPath[] = "/var/spool/crash";
+static const char kUserCrashPath[] = "/home/chronos/user/crash";
+
+// Directory mode of the user crash spool directory.
+static const mode_t kUserCrashPathMode = 0755;
+
+// Directory mode of the system crash spool directory.
+static const mode_t kSystemCrashPathMode = 01755;
+
+static const uid_t kRootOwner = 0;
+static const uid_t kRootGroup = 0;
+
+CrashCollector::CrashCollector() : forced_crash_directory_(NULL) {
+}
+
+CrashCollector::~CrashCollector() {
+}
+
+void CrashCollector::Initialize(
+ CrashCollector::CountCrashFunction count_crash_function,
+ CrashCollector::IsFeedbackAllowedFunction is_feedback_allowed_function,
+ SystemLogging *logger) {
+ CHECK(count_crash_function != NULL);
+ CHECK(is_feedback_allowed_function != NULL);
+ CHECK(logger != NULL);
+
+ count_crash_function_ = count_crash_function;
+ is_feedback_allowed_function_ = is_feedback_allowed_function;
+ logger_ = logger;
+}
+
+std::string CrashCollector::FormatDumpBasename(const std::string &exec_name,
+ time_t timestamp,
+ pid_t pid) {
+ struct tm tm;
+ localtime_r(×tamp, &tm);
+ return StringPrintf("%s.%04d%02d%02d.%02d%02d%02d.%d",
+ exec_name.c_str(),
+ tm.tm_year + 1900,
+ tm.tm_mon + 1,
+ tm.tm_mday,
+ tm.tm_hour,
+ tm.tm_min,
+ tm.tm_sec,
+ pid);
+}
+
+FilePath CrashCollector::GetCrashDirectoryInfo(
+ uid_t process_euid,
+ uid_t default_user_id,
+ gid_t default_user_group,
+ mode_t *mode,
+ uid_t *directory_owner,
+ gid_t *directory_group) {
+ if (process_euid == default_user_id) {
+ *mode = kUserCrashPathMode;
+ *directory_owner = default_user_id;
+ *directory_group = default_user_group;
+ return FilePath(kUserCrashPath);
+ } else {
+ *mode = kSystemCrashPathMode;
+ *directory_owner = kRootOwner;
+ *directory_group = kRootGroup;
+ return FilePath(kSystemCrashPath);
+ }
+}
+
+bool CrashCollector::GetUserInfoFromName(const std::string &name,
+ uid_t *uid,
+ gid_t *gid) {
+ char storage[256];
+ struct passwd passwd_storage;
+ struct passwd *passwd_result = NULL;
+
+ if (getpwnam_r(name.c_str(), &passwd_storage, storage, sizeof(storage),
+ &passwd_result) != 0 || passwd_result == NULL) {
+ logger_->LogError("Cannot find user named %s", name.c_str());
+ return false;
+ }
+
+ *uid = passwd_result->pw_uid;
+ *gid = passwd_result->pw_gid;
+ return true;
+}
+
+bool CrashCollector::GetCreatedCrashDirectoryByEuid(uid_t euid,
+ FilePath *crash_directory) {
+ uid_t default_user_id;
+ gid_t default_user_group;
+
+ // For testing.
+ if (forced_crash_directory_ != NULL) {
+ *crash_directory = FilePath(forced_crash_directory_);
+ return true;
+ }
+
+ if (!GetUserInfoFromName(kDefaultUserName,
+ &default_user_id,
+ &default_user_group)) {
+ logger_->LogError("Could not find default user info");
+ return false;
+ }
+ mode_t directory_mode;
+ uid_t directory_owner;
+ gid_t directory_group;
+ *crash_directory =
+ GetCrashDirectoryInfo(euid,
+ default_user_id,
+ default_user_group,
+ &directory_mode,
+ &directory_owner,
+ &directory_group);
+
+ if (!file_util::PathExists(*crash_directory)) {
+ // Create the spool directory with the appropriate mode (regardless of
+ // umask) and ownership.
+ mode_t old_mask = umask(0);
+ if (mkdir(crash_directory->value().c_str(), directory_mode) < 0 ||
+ chown(crash_directory->value().c_str(),
+ directory_owner,
+ directory_group) < 0) {
+ logger_->LogError("Unable to create appropriate crash directory");
+ return false;
+ }
+ umask(old_mask);
+ }
+
+ if (!file_util::PathExists(*crash_directory)) {
+ logger_->LogError("Unable to create crash directory %s",
+ crash_directory->value().c_str());
+ return false;
+ }
+
+ return true;
+}