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// SPDX-License-Identifier: MIT
// Copyright © 2018-2020 WireGuard LLC. All Rights Reserved.
import Foundation
import os.log
public class Logger {
enum LoggerError: Error {
case openFailure
}
static var global: Logger?
var log: OpaquePointer
var tag: String
init(tagged tag: String, withFilePath filePath: String) throws {
guard let log = open_log(filePath) else { throw LoggerError.openFailure }
self.log = log
self.tag = tag
}
deinit {
close_log(self.log)
}
func log(message: String) {
write_msg_to_log(log, tag, message.trimmingCharacters(in: .newlines))
}
func writeLog(to targetFile: String) -> Bool {
return write_log_to_file(targetFile, self.log) == 0
}
static func configureGlobal(tagged tag: String, withFilePath filePath: String?) {
if Logger.global != nil {
return
}
guard let filePath = filePath else {
os_log("Unable to determine log destination path. Log will not be saved to file.", log: OSLog.default, type: .error)
return
}
guard let logger = try? Logger(tagged: tag, withFilePath: filePath) else {
os_log("Unable to open log file for writing. Log will not be saved to file.", log: OSLog.default, type: .error)
return
}
Logger.global = logger
var appVersion = Bundle.main.infoDictionary?["CFBundleShortVersionString"] as? String ?? "Unknown version"
if let appBuild = Bundle.main.infoDictionary?["CFBundleVersion"] as? String {
appVersion += " (\(appBuild))"
}
Logger.global?.log(message: "App version: \(appVersion)")
}
}
func wg_log(_ type: OSLogType, staticMessage msg: StaticString) {
os_log(msg, log: OSLog.default, type: type)
Logger.global?.log(message: "\(msg)")
}
func wg_log(_ type: OSLogType, message msg: String) {
os_log("%{public}s", log: OSLog.default, type: type, msg)
Logger.global?.log(message: msg)
}
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