ClashX/Pods/CocoaLumberjack/Classes/DDASLLogger.m

122 lines
3.7 KiB
Objective-C

// Software License Agreement (BSD License)
//
// Copyright (c) 2010-2016, Deusty, LLC
// All rights reserved.
//
// Redistribution and use of this software in source and binary forms,
// with or without modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// * Neither the name of Deusty nor the names of its contributors may be used
// to endorse or promote products derived from this software without specific
// prior written permission of Deusty, LLC.
#import "DDASLLogger.h"
#import <asl.h>
#if !__has_feature(objc_arc)
#error This file must be compiled with ARC. Use -fobjc-arc flag (or convert project to ARC).
#endif
const char* const kDDASLKeyDDLog = "DDLog";
const char* const kDDASLDDLogValue = "1";
static DDASLLogger *sharedInstance;
@interface DDASLLogger () {
aslclient _client;
}
@end
@implementation DDASLLogger
+ (instancetype)sharedInstance {
static dispatch_once_t DDASLLoggerOnceToken;
dispatch_once(&DDASLLoggerOnceToken, ^{
sharedInstance = [[[self class] alloc] init];
});
return sharedInstance;
}
- (instancetype)init {
if (sharedInstance != nil) {
return nil;
}
if ((self = [super init])) {
// A default asl client is provided for the main thread,
// but background threads need to create their own client.
_client = asl_open(NULL, "com.apple.console", 0);
}
return self;
}
- (void)logMessage:(DDLogMessage *)logMessage {
// Skip captured log messages
if ([logMessage->_fileName isEqualToString:@"DDASLLogCapture"]) {
return;
}
NSString * message = _logFormatter ? [_logFormatter formatLogMessage:logMessage] : logMessage->_message;
if (message) {
const char *msg = [message UTF8String];
size_t aslLogLevel;
switch (logMessage->_flag) {
// Note: By default ASL will filter anything above level 5 (Notice).
// So our mappings shouldn't go above that level.
case DDLogFlagError : aslLogLevel = ASL_LEVEL_CRIT; break;
case DDLogFlagWarning : aslLogLevel = ASL_LEVEL_ERR; break;
case DDLogFlagInfo : aslLogLevel = ASL_LEVEL_WARNING; break; // Regular NSLog's level
case DDLogFlagDebug :
case DDLogFlagVerbose :
default : aslLogLevel = ASL_LEVEL_NOTICE; break;
}
static char const *const level_strings[] = { "0", "1", "2", "3", "4", "5", "6", "7" };
// NSLog uses the current euid to set the ASL_KEY_READ_UID.
uid_t const readUID = geteuid();
char readUIDString[16];
#ifndef NS_BLOCK_ASSERTIONS
size_t l = snprintf(readUIDString, sizeof(readUIDString), "%d", readUID);
#else
snprintf(readUIDString, sizeof(readUIDString), "%d", readUID);
#endif
NSAssert(l < sizeof(readUIDString),
@"Formatted euid is too long.");
NSAssert(aslLogLevel < (sizeof(level_strings) / sizeof(level_strings[0])),
@"Unhandled ASL log level.");
aslmsg m = asl_new(ASL_TYPE_MSG);
if (m != NULL) {
if (asl_set(m, ASL_KEY_LEVEL, level_strings[aslLogLevel]) == 0 &&
asl_set(m, ASL_KEY_MSG, msg) == 0 &&
asl_set(m, ASL_KEY_READ_UID, readUIDString) == 0 &&
asl_set(m, kDDASLKeyDDLog, kDDASLDDLogValue) == 0) {
asl_send(_client, m);
}
asl_free(m);
}
//TODO handle asl_* failures non-silently?
}
}
- (NSString *)loggerName {
return @"cocoa.lumberjack.aslLogger";
}
@end