[apple/syslog.git] / libsystem_asl.tproj / src / syslog.c

/*
 * Copyright (c) 1999-2013 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@
 */

/*
 * Copyright (c) 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
 */

#include <stdio.h>

#include <sys/syslog.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <pthread.h>
#include <dispatch/dispatch.h>
#include <asl.h>
#include <asl_msg.h>
#include <asl_private.h>

#ifdef __STDC__
#include <stdarg.h>
#else
#include <varargs.h>
#endif

#define	LOG_NO_NOTIFY	0x1000
extern const char *asl_syslog_faciliy_num_to_name(int n);

#ifdef BUILDING_VARIANT
__private_extern__ pthread_mutex_t _sl_lock;
__private_extern__ aslclient _sl_asl;
__private_extern__ char *_sl_ident;
__private_extern__ int _sl_fac;
__private_extern__ int _sl_opts;
__private_extern__ int _sl_mask;
#else /* !BUILDING_VARIANT */
__private_extern__ pthread_mutex_t _sl_lock = PTHREAD_MUTEX_INITIALIZER;
__private_extern__ aslclient _sl_asl = NULL;
__private_extern__ char *_sl_ident = NULL;
__private_extern__ int _sl_fac = 0;
__private_extern__ int _sl_opts = 0;
__private_extern__ int _sl_mask = 0;
#endif /* BUILDING_VARIANT */

/*
 * syslog, vsyslog --
 *	print message on log file; output is intended for syslogd(8).
 */
void
#ifdef __STDC__
syslog(int pri, const char *fmt, ...)
#else
syslog(pri, fmt, va_alist)
	int pri;
	char *fmt;
	va_dcl
#endif
{
	va_list ap;

#ifdef __STDC__
	va_start(ap, fmt);
#else
	va_start(ap);
#endif
	vsyslog(pri, fmt, ap);
	va_end(ap);
}

void
vsyslog(int pri, const char *fmt, va_list ap)
{
	int fac;
	asl_msg_t *facmsg;
	const char *facility;

	facmsg = NULL;
	fac = pri & LOG_FACMASK;
	if (fac != 0)
	{
		facility = asl_syslog_faciliy_num_to_name(fac);
		if (facility != NULL)
		{
			facmsg = asl_msg_new(ASL_TYPE_MSG);
			asl_msg_set_key_val(facmsg, ASL_KEY_FACILITY, facility);
		}
	}

	pthread_mutex_lock(&_sl_lock);

	/* open syslog ASL client if required */
	if (_sl_asl == NULL)
	{
		_sl_asl = asl_open(NULL, NULL, ASL_OPT_SYSLOG_LEGACY);
		_sl_mask = ASL_FILTER_MASK_UPTO(ASL_LEVEL_DEBUG);
		asl_set_filter(_sl_asl, _sl_mask);
	}

	asl_vlog(_sl_asl, (aslmsg)facmsg, LOG_PRI(pri), fmt, ap);

	pthread_mutex_unlock(&_sl_lock);

	if (facmsg != NULL) asl_msg_release(facmsg);
}

#ifndef BUILDING_VARIANT

void
openlog(const char *ident, int opts, int logfac)
{
	const char *facility;
	uint32_t asl_opts;

	pthread_mutex_lock(&_sl_lock);

	if (_sl_asl != NULL) asl_close(_sl_asl);
	_sl_asl = NULL;

	free(_sl_ident);
	_sl_ident = NULL;

	/* open with specified parameters */

	if (ident != NULL) _sl_ident = strdup(ident);
	/* NB we allow the strdup to fail silently */

	_sl_fac = logfac;
	facility = asl_syslog_faciliy_num_to_name(_sl_fac);

	_sl_opts = opts;
	asl_opts = ASL_OPT_SYSLOG_LEGACY;

	if (_sl_opts & LOG_NO_NOTIFY) asl_opts |= ASL_OPT_NO_REMOTE;
	if (_sl_opts & LOG_PERROR) asl_opts |= ASL_OPT_STDERR;

	_sl_mask = ASL_FILTER_MASK_UPTO(ASL_LEVEL_DEBUG);

	_sl_asl = asl_open(_sl_ident, facility, asl_opts);
	asl_set_filter(_sl_asl, _sl_mask);

	pthread_mutex_unlock(&_sl_lock);
}

void
closelog()
{
	pthread_mutex_lock(&_sl_lock);

	if (_sl_asl != NULL) asl_close(_sl_asl);
	_sl_asl = NULL;

	free(_sl_ident);
	_sl_ident = NULL;

	pthread_mutex_unlock(&_sl_lock);
}

/* setlogmask -- set the log mask level */
int
setlogmask(int mask)
{
	int oldmask;

	if (mask == 0) return _sl_mask;

	pthread_mutex_lock(&_sl_lock);

	_sl_mask = mask;
	oldmask = asl_set_filter(_sl_asl, mask);
	if (_sl_opts & LOG_PERROR) asl_set_output_file_filter(_sl_asl, STDERR_FILENO, mask);

	pthread_mutex_unlock(&_sl_lock);

	return oldmask;
}

#endif /* !BUILDING_VARIANT */
Commit	Line	Data
81582353	1	/*
f3df4c03	2	* Copyright (c) 1999-2013 Apple Inc. All rights reserved.
81582353 A	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	/*
	25	* Copyright (c) 1993
	26	* The Regents of the University of California. All rights reserved.
	27	*
	28	* Redistribution and use in source and binary forms, with or without
	29	* modification, are permitted provided that the following conditions
	30	* are met:
	31	* 1. Redistributions of source code must retain the above copyright
	32	* notice, this list of conditions and the following disclaimer.
	33	* 2. Redistributions in binary form must reproduce the above copyright
	34	* notice, this list of conditions and the following disclaimer in the
	35	* documentation and/or other materials provided with the distribution.
	36	* 3. All advertising materials mentioning features or use of this software
	37	* must display the following acknowledgement:
	38	* This product includes software developed by the University of
	39	* California, Berkeley and its contributors.
	40	* 4. Neither the name of the University nor the names of its contributors
	41	* may be used to endorse or promote products derived from this software
	42	* without specific prior written permission.
	43	*
	44	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	45	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	46	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	47	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	48	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	49	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	50	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	51	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	52	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	53	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	54	* SUCH DAMAGE.
	55	*/
	56
f3df4c03 A	57	#include <stdio.h>
f3df4c03 A	58
81582353 A	59	#include <sys/syslog.h>
	60	#include <stdlib.h>
	61	#include <string.h>
	62	#include <stdint.h>
	63	#include <pthread.h>
	64	#include <dispatch/dispatch.h>
	65	#include <asl.h>
f3df4c03 A	66	#include <asl_msg.h>
f3df4c03 A	67	#include <asl_private.h>
81582353 A	68
	69	#ifdef __STDC__
	70	#include <stdarg.h>
	71	#else
	72	#include <varargs.h>
	73	#endif
	74
	75	#define LOG_NO_NOTIFY 0x1000
	76	extern const char *asl_syslog_faciliy_num_to_name(int n);
	77
	78	#ifdef BUILDING_VARIANT
	79	__private_extern__ pthread_mutex_t _sl_lock;
	80	__private_extern__ aslclient _sl_asl;
	81	__private_extern__ char *_sl_ident;
	82	__private_extern__ int _sl_fac;
	83	__private_extern__ int _sl_opts;
	84	__private_extern__ int _sl_mask;
	85	#else /* !BUILDING_VARIANT */
	86	__private_extern__ pthread_mutex_t _sl_lock = PTHREAD_MUTEX_INITIALIZER;
	87	__private_extern__ aslclient _sl_asl = NULL;
	88	__private_extern__ char *_sl_ident = NULL;
	89	__private_extern__ int _sl_fac = 0;
	90	__private_extern__ int _sl_opts = 0;
	91	__private_extern__ int _sl_mask = 0;
	92	#endif /* BUILDING_VARIANT */
	93
	94	/*
	95	* syslog, vsyslog --
	96	* print message on log file; output is intended for syslogd(8).
	97	*/
	98	void
	99	#ifdef __STDC__
	100	syslog(int pri, const char *fmt, ...)
	101	#else
	102	syslog(pri, fmt, va_alist)
	103	int pri;
	104	char *fmt;
	105	va_dcl
	106	#endif
	107	{
	108	va_list ap;
	109
	110	#ifdef __STDC__
	111	va_start(ap, fmt);
	112	#else
	113	va_start(ap);
	114	#endif
	115	vsyslog(pri, fmt, ap);
	116	va_end(ap);
	117	}
	118
	119	void
	120	vsyslog(int pri, const char *fmt, va_list ap)
	121	{
	122	int fac;
f3df4c03	123	asl_msg_t *facmsg;
81582353 A	124	const char *facility;
	125
	126	facmsg = NULL;
	127	fac = pri & LOG_FACMASK;
	128	if (fac != 0)
	129	{
	130	facility = asl_syslog_faciliy_num_to_name(fac);
	131	if (facility != NULL)
	132	{
f3df4c03 A	133	facmsg = asl_msg_new(ASL_TYPE_MSG);
f3df4c03 A	134	asl_msg_set_key_val(facmsg, ASL_KEY_FACILITY, facility);
81582353 A	135	}
	136	}
	137
	138	pthread_mutex_lock(&_sl_lock);
	139
	140	/* open syslog ASL client if required */
	141	if (_sl_asl == NULL)
	142	{
	143	_sl_asl = asl_open(NULL, NULL, ASL_OPT_SYSLOG_LEGACY);
	144	_sl_mask = ASL_FILTER_MASK_UPTO(ASL_LEVEL_DEBUG);
	145	asl_set_filter(_sl_asl, _sl_mask);
	146	}
	147
f3df4c03	148	asl_vlog(_sl_asl, (aslmsg)facmsg, LOG_PRI(pri), fmt, ap);
81582353 A	149
	150	pthread_mutex_unlock(&_sl_lock);
	151
f3df4c03	152	if (facmsg != NULL) asl_msg_release(facmsg);
81582353 A	153	}
	154
	155	#ifndef BUILDING_VARIANT
	156
	157	void
	158	openlog(const char *ident, int opts, int logfac)
	159	{
	160	const char *facility;
	161	uint32_t asl_opts;
	162
	163	pthread_mutex_lock(&_sl_lock);
	164
f3df4c03	165	if (_sl_asl != NULL) asl_close(_sl_asl);
81582353 A	166	_sl_asl = NULL;
	167
	168	free(_sl_ident);
	169	_sl_ident = NULL;
	170
	171	/* open with specified parameters */
	172
	173	if (ident != NULL) _sl_ident = strdup(ident);
	174	/* NB we allow the strdup to fail silently */
	175
	176	_sl_fac = logfac;
	177	facility = asl_syslog_faciliy_num_to_name(_sl_fac);
	178
	179	_sl_opts = opts;
	180	asl_opts = ASL_OPT_SYSLOG_LEGACY;
	181
	182	if (_sl_opts & LOG_NO_NOTIFY) asl_opts \|= ASL_OPT_NO_REMOTE;
	183	if (_sl_opts & LOG_PERROR) asl_opts \|= ASL_OPT_STDERR;
	184
	185	_sl_mask = ASL_FILTER_MASK_UPTO(ASL_LEVEL_DEBUG);
	186
	187	_sl_asl = asl_open(_sl_ident, facility, asl_opts);
	188	asl_set_filter(_sl_asl, _sl_mask);
	189
	190	pthread_mutex_unlock(&_sl_lock);
	191	}
	192
	193	void
	194	closelog()
	195	{
	196	pthread_mutex_lock(&_sl_lock);
	197
	198	if (_sl_asl != NULL) asl_close(_sl_asl);
	199	_sl_asl = NULL;
	200
f3df4c03	201	free(_sl_ident);
81582353 A	202	_sl_ident = NULL;
	203
	204	pthread_mutex_unlock(&_sl_lock);
	205	}
	206
	207	/* setlogmask -- set the log mask level */
	208	int
	209	setlogmask(int mask)
	210	{
	211	int oldmask;
	212
	213	if (mask == 0) return _sl_mask;
	214
	215	pthread_mutex_lock(&_sl_lock);
	216
	217	_sl_mask = mask;
	218	oldmask = asl_set_filter(_sl_asl, mask);
f3df4c03	219	if (_sl_opts & LOG_PERROR) asl_set_output_file_filter(_sl_asl, STDERR_FILENO, mask);
81582353 A	220
	221	pthread_mutex_unlock(&_sl_lock);
	222
	223	return oldmask;
	224	}
	225
	226	#endif /* !BUILDING_VARIANT */