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//
// GTMLogger+ASL.m
//
// Copyright 2007-2008 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy
// of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.
//
#import "GTMLogger+ASL.h"
#import "GTMDefines.h"
@implementation GTMLogger (GTMLoggerASLAdditions)
+ (id)standardLoggerWithASL {
id me = [self standardLogger];
[me setWriter:[[[GTMLogASLWriter alloc] init] autorelease]];
[me setFormatter:[[[GTMLogASLFormatter alloc] init] autorelease]];
return me;
}
@end
@implementation GTMLogASLWriter
+ (id)aslWriter {
return [[[self alloc] initWithClientClass:nil facility:nil] autorelease];
}
+ (id)aslWriterWithFacility:(NSString *)facility {
return [[[self alloc] initWithClientClass:nil facility:facility] autorelease];
}
- (id)init {
return [self initWithClientClass:nil facility:nil];
}
- (id)initWithClientClass:(Class)clientClass facility:(NSString *)facility {
if ((self = [super init])) {
aslClientClass_ = clientClass;
if (aslClientClass_ == nil) {
aslClientClass_ = [GTMLoggerASLClient class];
}
facility_ = [facility copy];
}
return self;
}
- (void)dealloc {
[facility_ release];
[super dealloc];
}
- (void)logMessage:(NSString *)msg level:(GTMLoggerLevel)level {
// Because |facility_| is an argument to asl_open() we must store a separate
// one for each facility in thread-local storage.
static NSString *const kASLClientKey = @"GTMLoggerASLClient";
NSString *key = kASLClientKey;
if (facility_) {
key = [NSString stringWithFormat:@"GTMLoggerASLClient-%@", facility_];
}
// Lookup the ASL client in the thread-local storage dictionary
NSMutableDictionary *tls = [[NSThread currentThread] threadDictionary];
GTMLoggerASLClient *client = [tls objectForKey:key];
// If the ASL client wasn't found (e.g., the first call from this thread),
// then create it and store it in the thread-local storage dictionary
if (client == nil) {
client = [[[aslClientClass_ alloc] initWithFacility:facility_] autorelease];
[tls setObject:client forKey:key];
}
// Map the GTMLoggerLevel level to an ASL level.
int aslLevel = ASL_LEVEL_INFO;
switch (level) {
case kGTMLoggerLevelUnknown:
case kGTMLoggerLevelDebug:
case kGTMLoggerLevelInfo:
aslLevel = ASL_LEVEL_NOTICE;
break;
case kGTMLoggerLevelError:
aslLevel = ASL_LEVEL_ERR;
break;
case kGTMLoggerLevelAssert:
aslLevel = ASL_LEVEL_ALERT;
break;
}
[client log:msg level:aslLevel];
}
@end // GTMLogASLWriter
@implementation GTMLogASLFormatter
#if !defined(__clang__) && (__GNUC__*10+__GNUC_MINOR__ >= 42)
// Some versions of GCC (4.2 and below AFAIK) aren't great about supporting
// -Wmissing-format-attribute
// when the function is anything more complex than foo(NSString *fmt, ...).
// You see the error inside the function when you turn ... into va_args and
// attempt to call another function (like vsprintf for example).
// So we just shut off the warning for this function.
#pragma GCC diagnostic ignored "-Wmissing-format-attribute"
#endif // !__clang__
- (NSString *)stringForFunc:(NSString *)func
withFormat:(NSString *)fmt
valist:(va_list)args
level:(GTMLoggerLevel)level {
return [NSString stringWithFormat:@"%@ %@",
[self prettyNameForFunc:func],
// |super| has guard for nil |fmt| and |args|
[super stringForFunc:func withFormat:fmt valist:args level:level]];
}
#if !defined(__clang__) && (__GNUC__*10+__GNUC_MINOR__ >= 42)
#pragma GCC diagnostic error "-Wmissing-format-attribute"
#endif // !__clang__
@end // GTMLogASLFormatter
@implementation GTMLoggerASLClient
- (id)init {
return [self initWithFacility:nil];
}
- (id)initWithFacility:(NSString *)facility {
if ((self = [super init])) {
client_ = asl_open(NULL, [facility UTF8String], 0);
if (client_ == NULL) {
// COV_NF_START - no real way to test this
[self release];
return nil;
// COV_NF_END
}
#if TARGET_OS_IPHONE
// On iOS we need to flag the messages as available for read so
// asl_search() can see our own output.
msgOptions_ = asl_new(ASL_TYPE_MSG);
if ((msgOptions_ == NULL) ||
(asl_set(msgOptions_,
ASL_KEY_READ_UID,
[[NSString stringWithFormat:@"%d", getuid()] UTF8String]) != 0)) {
// COV_NF_START - no real way to test this
[self release];
return nil;
// COV_NF_END
}
#endif
}
return self;
}
- (void)dealloc {
if (msgOptions_ != NULL) asl_free(msgOptions_);
if (client_ != NULL) asl_close(client_);
[super dealloc];
}
// We don't test this one line because we don't want to pollute actual system
// logs with test messages.
// COV_NF_START
- (void)log:(NSString *)msg level:(int)level {
asl_log(client_, msgOptions_, level, "%s", [msg UTF8String]);
}
// COV_NF_END
@end // GTMLoggerASLClient
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