| // 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; |
| } |