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// SPDX-License-Identifier: MIT
// Copyright © 2018 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
init(withFilePath filePath: String) throws {
guard let log = open_log(filePath) else { throw LoggerError.openFailure }
self.log = log
}
deinit {
close_log(self.log)
}
func log(message: String) {
write_msg_to_log(log, message.trimmingCharacters(in: .newlines))
}
func writeLog(called ourTag: String, mergedWith otherLogFile: String, called otherTag: String, to targetFile: String) -> Bool {
guard let other = open_log(otherLogFile) else { return false }
let ret = write_logs_to_file(targetFile, log, ourTag, other, otherTag)
close_log(other)
return ret == 0
}
static func configureGlobal(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
}
do {
try Logger.global = Logger(withFilePath: filePath)
} catch {
os_log("Unable to open log file for writing. Log will not be saved to file.", log: OSLog.default, type: .error)
return
}
var appVersion = Bundle.main.infoDictionary?["CFBundleShortVersionString"] as? String ?? "Unknown version"
if let appBuild = Bundle.main.infoDictionary?["CFBundleVersion"] as? String {
appVersion += " (\(appBuild))"
}
let goBackendVersion = WIREGUARD_GO_VERSION
Logger.global?.log(message: "App version: \(appVersion); Go backend version: \(goBackendVersion)")
}
}
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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