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Commit	Line	Data
	1	/*
	2	* Copyright (c) 2004-2011 Apple Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. Please obtain a copy of the License at
	10	* http://www.opensource.apple.com/apsl/ and read it before using this
	11	* file.
	12	*
	13	* The Original Code and all software distributed under the License are
	14	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	15	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	16	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	17	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	18	* Please see the License for the specific language governing rights and
	19	* limitations under the License.
	20	*
	21	* @APPLE_LICENSE_HEADER_END@
	22	*/
	23
	24	#include <TargetConditionals.h>
	25
	26	#if TARGET_IPHONE_SIMULATOR
	27	struct _not_empty;
	28	#else
	29
	30	#include <sys/types.h>
	31	#include <sys/stat.h>
	32	#include <sys/socket.h>
	33	#include <sys/un.h>
	34	#include <sys/uio.h>
	35	#include <stdio.h>
	36	#include <stdlib.h>
	37	#include <string.h>
	38	#include <fcntl.h>
	39	#include <errno.h>
	40	#include <unistd.h>
	41	#include "daemon.h"
	42
	43	#define forever for(;;)
	44
	45	#define MY_ID "klog_in"
	46	#define BUFF_SIZE 4096
	47
	48	static char inbuf[BUFF_SIZE];
	49	static int bx;
	50	static int kfd = -1;
	51	static dispatch_source_t in_src;
	52	static dispatch_queue_t in_queue;
	53
	54	void
	55	klog_in_acceptdata(int fd)
	56	{
	57	ssize_t len;
	58	uint32_t i;
	59	char p, q;
	60	aslmsg m;
	61
	62	len = read(fd, inbuf + bx, BUFF_SIZE - bx);
	63	if (len <= 0) return;
	64
	65	p = inbuf;
	66	q = p + bx;
	67
	68	for (i = 0; i < len; i++, q++)
	69	{
	70	if (*q == '\n')
	71	{
	72	*q = '\0';
	73	m = asl_input_parse(p, q - p, NULL, SOURCE_KERN);
	74	process_message(m, SOURCE_KERN);
	75	p = q + 1;
	76	}
	77	}
	78
	79	if (p != inbuf)
	80	{
	81	memmove(inbuf, p, BUFF_SIZE - bx - 1);
	82	bx = q - p;
	83	}
	84	}
	85
	86	int
	87	klog_in_init()
	88	{
	89	static dispatch_once_t once;
	90
	91	dispatch_once(&once, ^{
	92	in_queue = dispatch_queue_create(MY_ID, NULL);
	93	});
	94
	95	asldebug("%s: init\n", MY_ID);
	96	if (kfd >= 0) return 0;
	97
	98	kfd = open(_PATH_KLOG, O_RDONLY, 0);
	99	if (kfd < 0)
	100	{
	101	asldebug("%s: couldn't open %s: %s\n", MY_ID, _PATH_KLOG, strerror(errno));
	102	return -1;
	103	}
	104
	105	if (fcntl(kfd, F_SETFL, O_NONBLOCK) < 0)
	106	{
	107	close(kfd);
	108	kfd = -1;
	109	asldebug("%s: couldn't set O_NONBLOCK for fd %d (%s): %s\n", MY_ID, kfd, _PATH_KLOG, strerror(errno));
	110	return -1;
	111	}
	112
	113	in_src = dispatch_source_create(DISPATCH_SOURCE_TYPE_READ, (uintptr_t)kfd, 0, in_queue);
	114	dispatch_source_set_event_handler(in_src, ^{ klog_in_acceptdata(kfd); });
	115
	116	dispatch_resume(in_src);
	117	return 0;
	118	}
	119
	120	int
	121	klog_in_close(void)
	122	{
	123	if (kfd < 0) return 1;
	124
	125	dispatch_source_cancel(in_src);
	126	dispatch_release(in_src);
	127	in_src = NULL;
	128
	129	close(kfd);
	130	kfd = -1;
	131
	132	return 0;
	133	}
	134
	135	int
	136	klog_in_reset(void)
	137	{
	138	return 0;
	139	}
	140
	141	#endif /* !TARGET_IPHONE_SIMULATOR */