[apple/syslog.git] / syslogd.tproj / klog_in.c

/*
 * Copyright (c) 2004-2011 Apple Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */

#include <TargetConditionals.h>

#if TARGET_IPHONE_SIMULATOR
struct _not_empty;
#else

#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/uio.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <unistd.h>
#include "daemon.h"

#define forever for(;;)

#define MY_ID "klog_in"
#define BUFF_SIZE 4096

static char inbuf[BUFF_SIZE];
static int bx;
static int kfd = -1;
static dispatch_source_t in_src;
static dispatch_queue_t in_queue;

void
klog_in_acceptdata(int fd)
{
	ssize_t len;
	uint32_t i;
	char *p, *q;
	asl_msg_t *m;

	len = read(fd, inbuf + bx, BUFF_SIZE - bx);
	if (len <= 0) return;

	p = inbuf;
	q = p + bx;

	for (i = 0; i < len; i++, q++)
	{
		if (*q == '\n')
		{
			*q = '\0';
			m = asl_input_parse(p, q - p, NULL, SOURCE_KERN);
			process_message(m, SOURCE_KERN);
			p = q + 1;
		}
	}

	if (p != inbuf)
	{
		memmove(inbuf, p, BUFF_SIZE - bx - 1);
		bx = q - p;
	}
}

int
klog_in_init()
{
	static dispatch_once_t once;

	dispatch_once(&once, ^{
		in_queue = dispatch_queue_create(MY_ID, NULL);
	});

	asldebug("%s: init\n", MY_ID);
	if (kfd >= 0) return 0;

	kfd = open(_PATH_KLOG, O_RDONLY, 0);
	if (kfd < 0)
	{
		asldebug("%s: couldn't open %s: %s\n", MY_ID, _PATH_KLOG, strerror(errno));
		return -1;
	}

	if (fcntl(kfd, F_SETFL, O_NONBLOCK) < 0)
	{
		close(kfd);
		kfd = -1;
		asldebug("%s: couldn't set O_NONBLOCK for fd %d (%s): %s\n", MY_ID, kfd, _PATH_KLOG, strerror(errno));
		return -1;
	}

	in_src = dispatch_source_create(DISPATCH_SOURCE_TYPE_READ, (uintptr_t)kfd, 0, in_queue);
	dispatch_source_set_event_handler(in_src, ^{ klog_in_acceptdata(kfd); });

	dispatch_resume(in_src);
	return 0;
}

int
klog_in_close(void)
{
	if (kfd < 0) return 1;

	dispatch_source_cancel(in_src);
	dispatch_release(in_src);
	in_src = NULL;

	close(kfd);
	kfd = -1;

	return 0;
}

int
klog_in_reset(void)
{
	return 0;
}

#endif /* !TARGET_IPHONE_SIMULATOR */
Commit	Line	Data
b16a592a	1	/*
db78b1bd	2	* Copyright (c) 2004-2011 Apple Inc. All rights reserved.
b16a592a A	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
5dd30d76 A	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.
b16a592a A	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,
5dd30d76 A	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.
b16a592a A	20	*
	21	* @APPLE_LICENSE_HEADER_END@
	22	*/
	23
81582353 A	24	#include <TargetConditionals.h>
	25
	26	#if TARGET_IPHONE_SIMULATOR
	27	struct _not_empty;
	28	#else
	29
b16a592a A	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"
db78b1bd	46	#define BUFF_SIZE 4096
b16a592a	47
db78b1bd A	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;
b16a592a	53
db78b1bd A	54	void
db78b1bd A	55	klog_in_acceptdata(int fd)
b16a592a	56	{
db78b1bd A	57	ssize_t len;
	58	uint32_t i;
	59	char p, q;
f3df4c03	60	asl_msg_t *m;
b16a592a	61
db78b1bd A	62	len = read(fd, inbuf + bx, BUFF_SIZE - bx);
db78b1bd A	63	if (len <= 0) return;
b16a592a	64
db78b1bd A	65	p = inbuf;
	66	q = p + bx;
	67
	68	for (i = 0; i < len; i++, q++)
b16a592a	69	{
db78b1bd A	70	if (*q == '\n')
	71	{
	72	*q = '\0';
	73	m = asl_input_parse(p, q - p, NULL, SOURCE_KERN);
81582353	74	process_message(m, SOURCE_KERN);
db78b1bd A	75	p = q + 1;
db78b1bd A	76	}
b16a592a A	77	}
b16a592a A	78
db78b1bd A	79	if (p != inbuf)
	80	{
	81	memmove(inbuf, p, BUFF_SIZE - bx - 1);
	82	bx = q - p;
	83	}
b16a592a A	84	}
	85
	86	int
db78b1bd	87	klog_in_init()
b16a592a	88	{
db78b1bd A	89	static dispatch_once_t once;
	90
	91	dispatch_once(&once, ^{
	92	in_queue = dispatch_queue_create(MY_ID, NULL);
	93	});
	94
b16a592a	95	asldebug("%s: init\n", MY_ID);
db78b1bd	96	if (kfd >= 0) return 0;
b16a592a	97
db78b1bd A	98	kfd = open(_PATH_KLOG, O_RDONLY, 0);
db78b1bd A	99	if (kfd < 0)
b16a592a A	100	{
	101	asldebug("%s: couldn't open %s: %s\n", MY_ID, _PATH_KLOG, strerror(errno));
	102	return -1;
	103	}
	104
db78b1bd	105	if (fcntl(kfd, F_SETFL, O_NONBLOCK) < 0)
b16a592a	106	{
db78b1bd A	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));
b16a592a A	110	return -1;
	111	}
	112
db78b1bd A	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;
b16a592a A	118	}
b16a592a A	119
b16a592a A	120	int
	121	klog_in_close(void)
	122	{
db78b1bd A	123	if (kfd < 0) return 1;
	124
	125	dispatch_source_cancel(in_src);
	126	dispatch_release(in_src);
	127	in_src = NULL;
b16a592a	128
db78b1bd A	129	close(kfd);
db78b1bd A	130	kfd = -1;
b16a592a A	131
	132	return 0;
	133	}
a83ff38a A	134
	135	int
	136	klog_in_reset(void)
	137	{
	138	return 0;
	139	}
81582353 A	140
81582353 A	141	#endif /* !TARGET_IPHONE_SIMULATOR */