ASLConnection.m #1

//
//  ASLConnection.m
//
//  Copyright 2009 Standard Orbit Software, LLC. All rights reserved.
//
//  $Rev$
//  $LastChangedBy$
//  $LastChangedDate$

#import "ASLConnection.h"

@implementation ASLConnection
@synthesize aslclientRef = __aslclientRef;
@dynamic loggingDescriptors;

#pragma mark -
#pragma mark Creation

+ (id) ASLConnection
{
	return [[[self alloc] init] autorelease];
}

- (id) init
{
	self = [super init];
	if (!self) return nil;
	
	__aslclientRef = NULL;
	__extraLoggingDescriptors = [[NSMutableArray alloc] init];
	
	return self;
}

- (void) dealloc
{		
	// Ensure that the ASL connection is closed.
	[self close];
	
	[__extraLoggingDescriptors release], __extraLoggingDescriptors = nil;
	
#if ASLCONNECTION_DEBUG
	NSThread *currentThread = [NSThread currentThread];
	NSLog(@"Deallocating %@ on %@ thread %@", self, ([currentThread isMainThread] ? @"main" : @"background"), currentThread);	
#endif
	
	[super dealloc];
}

#pragma mark -

- (void) openForFacility:(NSString *)facility options:(uint32_t)options
{
	if (__aslclientRef) return;
	
	/* If no facility is specified, use "com.apple.console" */
	
	const char *normalizedFacility = facility ? [facility UTF8String] : "com.apple.console";
	
	__aslclientRef = asl_open (NULL /*ident*/, normalizedFacility, options);
}

- (BOOL) isOpen;
{
	return (__aslclientRef != NULL);
}

- (void) close;
{		
	if ([self isOpen])
	{
		asl_close (__aslclientRef);
	}
	__aslclientRef = NULL;
	[__extraLoggingDescriptors removeAllObjects];
}

#pragma mark -
#pragma mark Logging Streams

- (BOOL) addLoggingDescriptor:(int)descriptor
{
	NSAssert ([self isOpen], @"ASL Client must be open to add file descriptors");
	
	BOOL success = (asl_add_log_file (__aslclientRef, descriptor) == 0);
	if (success) 
	{
		[__extraLoggingDescriptors addObject: [NSNumber numberWithInt:descriptor]];
	}
	return success;
}

- (BOOL) removeLoggingDescriptor:(int)descriptor
{
	NSAssert ([self isOpen], @"ASL Client must be open to add file descriptors");
	
	BOOL success = asl_remove_log_file (__aslclientRef, descriptor) == 0;
	if (success)
	{
		[__extraLoggingDescriptors removeObject:[NSNumber numberWithInt:descriptor]];
	}
	return success;
}

- (NSArray *) loggingDescriptors;
{
	return [NSArray arrayWithArray:__extraLoggingDescriptors];
}
@end

#pragma mark -
#pragma mark License

/*
 Copyright (c) 2009, Standard Orbit Software, LLC. All rights reserved.
 
 Redistribution and use 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.
 Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
 Neither the name of the Standard Orbit Software, LLC nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */