[apple/libc.git] / gen / syslog.c

/*
 * Copyright (c) 1999 Apple Computer, 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 <sys/types.h>
#include <sys/socket.h>
#include <sys/syslog.h>
#include <sys/uio.h>
#include <sys/un.h>
#include <netdb.h>

#include <errno.h>
#include <fcntl.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <notify.h>

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

#include <crt_externs.h>

#define	LOG_NO_NOTIFY	0x1000

#ifdef BUILDING_VARIANT
__private_extern__ int	_sl_LogFile;		/* fd for log */
__private_extern__ int	_sl_connected;		/* have done connect */
__private_extern__ int	_sl_LogStat;		/* status bits, set by openlog() */
__private_extern__ const char *_sl_LogTag;	/* string to tag the entry with */
__private_extern__ int	_sl_LogFacility;	/* default facility code */
__private_extern__ int	_sl_LogMask;		/* mask of priorities to be logged */
__private_extern__ int  _sl_NotifyToken;	/* for remote control of priority filter */
__private_extern__ int  _sl_NotifyMaster;	/* for remote control of priority filter */
#else /* !BUILDING_VARIANT */
__private_extern__ int	_sl_LogFile = -1;		/* fd for log */
__private_extern__ int	_sl_connected = 0;		/* have done connect */
__private_extern__ int	_sl_LogStat = 0;		/* status bits, set by openlog() */
__private_extern__ const char *_sl_LogTag = NULL;	/* string to tag the entry with */
__private_extern__ int	_sl_LogFacility = LOG_USER;	/* default facility code */
__private_extern__ int	_sl_LogMask = 0xff;		/* mask of priorities to be logged */
__private_extern__ int  _sl_NotifyToken = -1;	/* for remote control of max logged priority */
__private_extern__ int  _sl_NotifyMaster = -1;	/* for remote control of max logged priority */
#endif /* BUILDING_VARIANT */

__private_extern__ void _sl_init_notify();

#define NOTIFY_SYSTEM_MASTER "com.apple.system.syslog.master"
#define NOTIFY_PREFIX_SYSTEM "com.apple.system.syslog"
#define NOTIFY_PREFIX_USER "user.syslog"
#define NOTIFY_STATE_OFFSET 1000

/* notify SPI */
uint32_t notify_get_state(int token, int *state);
uint32_t notify_register_plain(const char *name, int *out_token);

/*
 * 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(pri, fmt, ap)
	int pri;
	register const char *fmt;
	va_list ap;
{
	register int cnt;
	register char ch, *p, *t;
	time_t now;
	int fd, saved_errno, filter, cval, rc_filter, primask;
#define	TBUF_LEN	2048
#define	FMT_LEN		1024
	char *stdp, tbuf[TBUF_LEN], fmt_cpy[FMT_LEN];
	int tbuf_left, fmt_left, prlen;
	
#define	INTERNALLOG	LOG_ERR|LOG_CONS|LOG_PERROR|LOG_PID
	/* Check for invalid bits. */
	if (pri & ~(LOG_PRIMASK|LOG_FACMASK))
	{
		syslog(INTERNALLOG, "syslog: unknown facility/priority: %x", pri);
		pri &= LOG_PRIMASK|LOG_FACMASK;
	}

	/* Get remote-control priority filter */
	filter = _sl_LogMask;
	rc_filter = 0;

	_sl_init_notify();

	if (_sl_NotifyToken >= 0) 
	{
		if (notify_get_state(_sl_NotifyToken, &cval) == NOTIFY_STATUS_OK)
		{
			if (cval != 0)
			{
				filter = cval;
				rc_filter = 1;
			}
		}
	}

	if ((rc_filter == 0) && (_sl_NotifyMaster >= 0))
	{
		if (notify_get_state(_sl_NotifyMaster, &cval) == NOTIFY_STATUS_OK)
		{
			if (cval != 0)
			{
				filter = cval;
			}
		}
	}

	primask = LOG_MASK(LOG_PRI(pri));
	if ((primask & filter) == 0) return;

	saved_errno = errno;

	/* Set default facility if none specified. */
	if ((pri & LOG_FACMASK) == 0) pri |= _sl_LogFacility;

	/* Build the message. */
	
	/*
 	 * Although it's tempting, we can't ignore the possibility of
	 * overflowing the buffer when assembling the "fixed" portion
	 * of the message.  Strftime's "%h" directive expands to the
	 * locale's abbreviated month name, but if the user has the
	 * ability to construct to his own locale files, it may be
	 * arbitrarily long.
	 */
	(void)time(&now);

	p = tbuf;  
	tbuf_left = TBUF_LEN;
	
#define	DEC()	\
	do {					\
		if (prlen >= tbuf_left)		\
			prlen = tbuf_left - 1;	\
		p += prlen;			\
		tbuf_left -= prlen;		\
	} while (0)

	prlen = snprintf(p, tbuf_left, "<%d>", pri);
	DEC();

	prlen = strftime(p, tbuf_left, "%h %e %T ", localtime(&now));
	DEC();

	if (_sl_LogStat & LOG_PERROR) stdp = p;

	if (_sl_LogTag == NULL) _sl_LogTag = *(*_NSGetArgv());

	if (_sl_LogTag != NULL) 
	{
		prlen = snprintf(p, tbuf_left, "%s", _sl_LogTag);
		DEC();
	}

	if (_sl_LogStat & LOG_PID)
	{
		prlen = snprintf(p, tbuf_left, "[%d]", getpid());
		DEC();
	}

	if (_sl_LogTag != NULL)
	{
		if (tbuf_left > 1)
		{
			*p++ = ':';
			tbuf_left--;
		}
		if (tbuf_left > 1)
		{
			*p++ = ' ';
			tbuf_left--;
		}
	}

	/* 
	 * We wouldn't need this mess if printf handled %m, or if 
	 * strerror() had been invented before syslog().
	 */
	for (t = fmt_cpy, fmt_left = FMT_LEN; (ch = *fmt); ++fmt)
	{
		if (ch == '%' && fmt[1] == 'm')
		{
			++fmt;
			prlen = snprintf(t, fmt_left, "%s", strerror(saved_errno));
			if (prlen >= fmt_left) prlen = fmt_left - 1;
			t += prlen;
			fmt_left -= prlen;
		}
		else
		{
			if (fmt_left > 1)
			{
				*t++ = ch;
				fmt_left--;
			}
		}
	}

	*t = '\0';

	prlen = vsnprintf(p, tbuf_left, fmt_cpy, ap);
	DEC();
	cnt = p - tbuf;

	/* Output to stderr if requested. */
	if (_sl_LogStat & LOG_PERROR)
	{
		struct iovec iov[2];

		iov[0].iov_base = stdp;
		iov[0].iov_len = cnt - (stdp - tbuf);
		iov[1].iov_base = "\n";
		iov[1].iov_len = 1;
		(void)writev(STDERR_FILENO, iov, 2);
	}

	/* Get connected, output the message to the local logger. */
	if (_sl_connected == 0) openlog(_sl_LogTag, _sl_LogStat | LOG_NDELAY, 0);
	if (send(_sl_LogFile, tbuf, cnt, 0) >= 0) return;

	/*
	 * Output the message to the console; don't worry about blocking,
	 * if console blocks everything will.  Make sure the error reported
	 * is the one from the syslogd failure.
	 */
	if (_sl_LogStat & LOG_CONS && (fd = open(_PATH_CONSOLE, O_WRONLY, 0)) >= 0)
	{
		struct iovec iov[2];
		
		p = strchr(tbuf, '>') + 1;
		iov[0].iov_base = p;
		iov[0].iov_len = cnt - (p - tbuf);
		iov[1].iov_base = "\r\n";
		iov[1].iov_len = 2;
		(void)writev(fd, iov, 2);
		(void)close(fd);
	}
}

#ifndef BUILDING_VARIANT

static struct sockaddr_un SyslogAddr;	/* AF_UNIX address of local logger */

__private_extern__ void
_sl_init_notify()
{
	int status;
	char *notify_name;
	const char *prefix;
	
	if (_sl_LogStat & LOG_NO_NOTIFY)
	{
		_sl_NotifyMaster = -2;
		_sl_NotifyToken = -2;
		return;
	}
	
	if (_sl_NotifyMaster == -1)
	{
		status = notify_register_plain(NOTIFY_SYSTEM_MASTER, &_sl_NotifyMaster);
		if (status != NOTIFY_STATUS_OK) _sl_NotifyMaster = -2;
	}
	
	if (_sl_NotifyToken == -1)
	{
		_sl_NotifyToken = -2;
		
		notify_name = NULL;
		prefix = NOTIFY_PREFIX_USER;
		if (getuid() == 0) prefix = NOTIFY_PREFIX_SYSTEM;
		asprintf(&notify_name, "%s.%d", prefix, getpid());
		
		if (notify_name != NULL)
		{
			status = notify_register_plain(notify_name, &_sl_NotifyToken);
			free(notify_name);
			if (status != NOTIFY_STATUS_OK) _sl_NotifyToken = -2;
		}
	}
}

void
openlog(ident, logstat, logfac)
	const char *ident;
	int logstat, logfac;
{
	if (ident != NULL) _sl_LogTag = ident;

	_sl_LogStat = logstat;

	if (logfac != 0 && (logfac &~ LOG_FACMASK) == 0) _sl_LogFacility = logfac;

	if (_sl_LogFile == -1)
	{
		SyslogAddr.sun_family = AF_UNIX;
		(void)strncpy(SyslogAddr.sun_path, _PATH_LOG, sizeof(SyslogAddr.sun_path));
		if (_sl_LogStat & LOG_NDELAY)
		{
			if ((_sl_LogFile = socket(AF_UNIX, SOCK_DGRAM, 0)) == -1) return;
			(void)fcntl(_sl_LogFile, F_SETFD, 1);
		}
	}

	if ((_sl_LogFile != -1) && (_sl_connected == 0))
	{
		if (connect(_sl_LogFile, (struct sockaddr *)&SyslogAddr, sizeof(SyslogAddr)) == -1)
		{
			(void)close(_sl_LogFile);
			_sl_LogFile = -1;
		}
		else
		{
			_sl_connected = 1;
		}
	}

	_sl_init_notify();
}

void
closelog()
{
	(void)close(_sl_LogFile);
	_sl_LogFile = -1;
	_sl_connected = 0;
}

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

	omask = _sl_LogMask;
	if (pmask != 0) _sl_LogMask = pmask;
	return (omask);
}

#endif /* !BUILDING_VARIANT */
Commit	Line	Data
e9ce8d39 A	1	/*
	2	* Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
734aad71 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.
	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
e9ce8d39 A	15	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
e9ce8d39 A	16	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
734aad71 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.
e9ce8d39 A	20	*
	21	* @APPLE_LICENSE_HEADER_END@
	22	*/
	23	/*
	24	* Copyright (c) 1993
	25	* The Regents of the University of California. All rights reserved.
	26	*
	27	* Redistribution and use in source and binary forms, with or without
	28	* modification, are permitted provided that the following conditions
	29	* are met:
	30	* 1. Redistributions of source code must retain the above copyright
	31	* notice, this list of conditions and the following disclaimer.
	32	* 2. Redistributions in binary form must reproduce the above copyright
	33	* notice, this list of conditions and the following disclaimer in the
	34	* documentation and/or other materials provided with the distribution.
	35	* 3. All advertising materials mentioning features or use of this software
	36	* must display the following acknowledgement:
	37	* This product includes software developed by the University of
	38	* California, Berkeley and its contributors.
	39	* 4. Neither the name of the University nor the names of its contributors
	40	* may be used to endorse or promote products derived from this software
	41	* without specific prior written permission.
	42	*
	43	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	44	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	45	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	46	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	47	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	48	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	49	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	50	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	51	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	52	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	53	* SUCH DAMAGE.
	54	*/
	55
	56	#include <sys/types.h>
	57	#include <sys/socket.h>
	58	#include <sys/syslog.h>
	59	#include <sys/uio.h>
	60	#include <sys/un.h>
	61	#include <netdb.h>
	62
	63	#include <errno.h>
	64	#include <fcntl.h>
	65	#include <paths.h>
	66	#include <stdio.h>
3d9156a7	67	#include <stdlib.h>
e9ce8d39 A	68	#include <string.h>
	69	#include <time.h>
	70	#include <unistd.h>
3d9156a7	71	#include <notify.h>
e9ce8d39 A	72
	73	#ifdef __STDC__
	74	#include <stdarg.h>
	75	#else
	76	#include <varargs.h>
	77	#endif
	78
	79	#include <crt_externs.h>
3d9156a7 A	80
	81	#define LOG_NO_NOTIFY 0x1000
	82
	83	#ifdef BUILDING_VARIANT
	84	__private_extern__ int _sl_LogFile; /* fd for log */
	85	__private_extern__ int _sl_connected; /* have done connect */
	86	__private_extern__ int _sl_LogStat; /* status bits, set by openlog() */
	87	__private_extern__ const char _sl_LogTag; / string to tag the entry with */
	88	__private_extern__ int _sl_LogFacility; /* default facility code */
	89	__private_extern__ int _sl_LogMask; /* mask of priorities to be logged */
	90	__private_extern__ int _sl_NotifyToken; /* for remote control of priority filter */
	91	__private_extern__ int _sl_NotifyMaster; /* for remote control of priority filter */
	92	#else /* !BUILDING_VARIANT */
	93	__private_extern__ int _sl_LogFile = -1; /* fd for log */
	94	__private_extern__ int _sl_connected = 0; /* have done connect */
	95	__private_extern__ int _sl_LogStat = 0; /* status bits, set by openlog() */
	96	__private_extern__ const char _sl_LogTag = NULL; / string to tag the entry with */
	97	__private_extern__ int _sl_LogFacility = LOG_USER; /* default facility code */
	98	__private_extern__ int _sl_LogMask = 0xff; /* mask of priorities to be logged */
	99	__private_extern__ int _sl_NotifyToken = -1; /* for remote control of max logged priority */
	100	__private_extern__ int _sl_NotifyMaster = -1; /* for remote control of max logged priority */
	101	#endif /* BUILDING_VARIANT */
	102
	103	__private_extern__ void _sl_init_notify();
	104
	105	#define NOTIFY_SYSTEM_MASTER "com.apple.system.syslog.master"
	106	#define NOTIFY_PREFIX_SYSTEM "com.apple.system.syslog"
	107	#define NOTIFY_PREFIX_USER "user.syslog"
	108	#define NOTIFY_STATE_OFFSET 1000
	109
	110	/* notify SPI */
	111	uint32_t notify_get_state(int token, int *state);
	112	uint32_t notify_register_plain(const char name, int out_token);
e9ce8d39 A	113
	114	/*
	115	* syslog, vsyslog --
	116	* print message on log file; output is intended for syslogd(8).
	117	*/
	118	void
	119	#ifdef __STDC__
	120	syslog(int pri, const char *fmt, ...)
	121	#else
	122	syslog(pri, fmt, va_alist)
	123	int pri;
	124	char *fmt;
	125	va_dcl
	126	#endif
	127	{
	128	va_list ap;
	129
	130	#ifdef __STDC__
	131	va_start(ap, fmt);
	132	#else
	133	va_start(ap);
	134	#endif
	135	vsyslog(pri, fmt, ap);
	136	va_end(ap);
	137	}
	138
	139	void
	140	vsyslog(pri, fmt, ap)
	141	int pri;
	142	register const char *fmt;
	143	va_list ap;
	144	{
	145	register int cnt;
	146	register char ch, p, t;
	147	time_t now;
3d9156a7	148	int fd, saved_errno, filter, cval, rc_filter, primask;
e9ce8d39 A	149	#define TBUF_LEN 2048
	150	#define FMT_LEN 1024
	151	char *stdp, tbuf[TBUF_LEN], fmt_cpy[FMT_LEN];
	152	int tbuf_left, fmt_left, prlen;
3d9156a7	153
e9ce8d39 A	154	#define INTERNALLOG LOG_ERR\|LOG_CONS\|LOG_PERROR\|LOG_PID
e9ce8d39 A	155	/* Check for invalid bits. */
3d9156a7 A	156	if (pri & ~(LOG_PRIMASK\|LOG_FACMASK))
	157	{
	158	syslog(INTERNALLOG, "syslog: unknown facility/priority: %x", pri);
e9ce8d39 A	159	pri &= LOG_PRIMASK\|LOG_FACMASK;
	160	}
	161
3d9156a7 A	162	/* Get remote-control priority filter */
	163	filter = _sl_LogMask;
	164	rc_filter = 0;
	165
	166	_sl_init_notify();
	167
	168	if (_sl_NotifyToken >= 0)
	169	{
	170	if (notify_get_state(_sl_NotifyToken, &cval) == NOTIFY_STATUS_OK)
	171	{
	172	if (cval != 0)
	173	{
	174	filter = cval;
	175	rc_filter = 1;
	176	}
	177	}
	178	}
	179
	180	if ((rc_filter == 0) && (_sl_NotifyMaster >= 0))
	181	{
	182	if (notify_get_state(_sl_NotifyMaster, &cval) == NOTIFY_STATUS_OK)
	183	{
	184	if (cval != 0)
	185	{
	186	filter = cval;
	187	}
	188	}
	189	}
	190
	191	primask = LOG_MASK(LOG_PRI(pri));
	192	if ((primask & filter) == 0) return;
e9ce8d39 A	193
	194	saved_errno = errno;
	195
	196	/* Set default facility if none specified. */
3d9156a7	197	if ((pri & LOG_FACMASK) == 0) pri \|= _sl_LogFacility;
e9ce8d39 A	198
	199	/* Build the message. */
	200
	201	/*
	202	* Although it's tempting, we can't ignore the possibility of
	203	* overflowing the buffer when assembling the "fixed" portion
	204	* of the message. Strftime's "%h" directive expands to the
	205	* locale's abbreviated month name, but if the user has the
	206	* ability to construct to his own locale files, it may be
	207	* arbitrarily long.
	208	*/
	209	(void)time(&now);
	210
	211	p = tbuf;
	212	tbuf_left = TBUF_LEN;
	213
	214	#define DEC() \
	215	do { \
	216	if (prlen >= tbuf_left) \
	217	prlen = tbuf_left - 1; \
	218	p += prlen; \
	219	tbuf_left -= prlen; \
	220	} while (0)
	221
	222	prlen = snprintf(p, tbuf_left, "<%d>", pri);
	223	DEC();
	224
	225	prlen = strftime(p, tbuf_left, "%h %e %T ", localtime(&now));
	226	DEC();
	227
3d9156a7 A	228	if (_sl_LogStat & LOG_PERROR) stdp = p;
	229
	230	if (_sl_LogTag == NULL) _sl_LogTag = (_NSGetArgv());
	231
	232	if (_sl_LogTag != NULL)
	233	{
	234	prlen = snprintf(p, tbuf_left, "%s", _sl_LogTag);
e9ce8d39 A	235	DEC();
e9ce8d39 A	236	}
3d9156a7 A	237
	238	if (_sl_LogStat & LOG_PID)
	239	{
e9ce8d39 A	240	prlen = snprintf(p, tbuf_left, "[%d]", getpid());
	241	DEC();
	242	}
3d9156a7 A	243
	244	if (_sl_LogTag != NULL)
	245	{
	246	if (tbuf_left > 1)
	247	{
e9ce8d39 A	248	*p++ = ':';
	249	tbuf_left--;
	250	}
3d9156a7 A	251	if (tbuf_left > 1)
3d9156a7 A	252	{
e9ce8d39 A	253	*p++ = ' ';
	254	tbuf_left--;
	255	}
	256	}
	257
	258	/*
	259	* We wouldn't need this mess if printf handled %m, or if
	260	* strerror() had been invented before syslog().
	261	*/
3d9156a7 A	262	for (t = fmt_cpy, fmt_left = FMT_LEN; (ch = *fmt); ++fmt)
	263	{
	264	if (ch == '%' && fmt[1] == 'm')
	265	{
e9ce8d39	266	++fmt;
3d9156a7 A	267	prlen = snprintf(t, fmt_left, "%s", strerror(saved_errno));
3d9156a7 A	268	if (prlen >= fmt_left) prlen = fmt_left - 1;
e9ce8d39 A	269	t += prlen;
e9ce8d39 A	270	fmt_left -= prlen;
3d9156a7 A	271	}
	272	else
	273	{
	274	if (fmt_left > 1)
	275	{
e9ce8d39 A	276	*t++ = ch;
	277	fmt_left--;
	278	}
	279	}
	280	}
3d9156a7	281
e9ce8d39 A	282	*t = '\0';
	283
	284	prlen = vsnprintf(p, tbuf_left, fmt_cpy, ap);
	285	DEC();
	286	cnt = p - tbuf;
	287
	288	/* Output to stderr if requested. */
3d9156a7 A	289	if (_sl_LogStat & LOG_PERROR)
3d9156a7 A	290	{
e9ce8d39 A	291	struct iovec iov[2];
	292
	293	iov[0].iov_base = stdp;
	294	iov[0].iov_len = cnt - (stdp - tbuf);
	295	iov[1].iov_base = "\n";
	296	iov[1].iov_len = 1;
	297	(void)writev(STDERR_FILENO, iov, 2);
	298	}
	299
	300	/* Get connected, output the message to the local logger. */
3d9156a7 A	301	if (_sl_connected == 0) openlog(_sl_LogTag, _sl_LogStat \| LOG_NDELAY, 0);
3d9156a7 A	302	if (send(_sl_LogFile, tbuf, cnt, 0) >= 0) return;
e9ce8d39 A	303
	304	/*
	305	* Output the message to the console; don't worry about blocking,
	306	* if console blocks everything will. Make sure the error reported
	307	* is the one from the syslogd failure.
	308	*/
3d9156a7 A	309	if (_sl_LogStat & LOG_CONS && (fd = open(_PATH_CONSOLE, O_WRONLY, 0)) >= 0)
3d9156a7 A	310	{
e9ce8d39 A	311	struct iovec iov[2];
	312
	313	p = strchr(tbuf, '>') + 1;
	314	iov[0].iov_base = p;
	315	iov[0].iov_len = cnt - (p - tbuf);
	316	iov[1].iov_base = "\r\n";
	317	iov[1].iov_len = 2;
	318	(void)writev(fd, iov, 2);
	319	(void)close(fd);
	320	}
	321	}
	322
3d9156a7 A	323	#ifndef BUILDING_VARIANT
3d9156a7 A	324
e9ce8d39 A	325	static struct sockaddr_un SyslogAddr; /* AF_UNIX address of local logger */
e9ce8d39 A	326
3d9156a7 A	327	__private_extern__ void
	328	_sl_init_notify()
	329	{
	330	int status;
	331	char *notify_name;
	332	const char *prefix;
	333
	334	if (_sl_LogStat & LOG_NO_NOTIFY)
	335	{
	336	_sl_NotifyMaster = -2;
	337	_sl_NotifyToken = -2;
	338	return;
	339	}
	340
	341	if (_sl_NotifyMaster == -1)
	342	{
	343	status = notify_register_plain(NOTIFY_SYSTEM_MASTER, &_sl_NotifyMaster);
	344	if (status != NOTIFY_STATUS_OK) _sl_NotifyMaster = -2;
	345	}
	346
	347	if (_sl_NotifyToken == -1)
	348	{
	349	_sl_NotifyToken = -2;
	350
	351	notify_name = NULL;
	352	prefix = NOTIFY_PREFIX_USER;
	353	if (getuid() == 0) prefix = NOTIFY_PREFIX_SYSTEM;
	354	asprintf(&notify_name, "%s.%d", prefix, getpid());
	355
	356	if (notify_name != NULL)
	357	{
	358	status = notify_register_plain(notify_name, &_sl_NotifyToken);
	359	free(notify_name);
	360	if (status != NOTIFY_STATUS_OK) _sl_NotifyToken = -2;
	361	}
	362	}
	363	}
	364
e9ce8d39 A	365	void
	366	openlog(ident, logstat, logfac)
	367	const char *ident;
	368	int logstat, logfac;
	369	{
3d9156a7 A	370	if (ident != NULL) _sl_LogTag = ident;
	371
	372	_sl_LogStat = logstat;
	373
	374	if (logfac != 0 && (logfac &~ LOG_FACMASK) == 0) _sl_LogFacility = logfac;
e9ce8d39	375
3d9156a7 A	376	if (_sl_LogFile == -1)
3d9156a7 A	377	{
e9ce8d39	378	SyslogAddr.sun_family = AF_UNIX;
3d9156a7 A	379	(void)strncpy(SyslogAddr.sun_path, _PATH_LOG, sizeof(SyslogAddr.sun_path));
	380	if (_sl_LogStat & LOG_NDELAY)
	381	{
	382	if ((_sl_LogFile = socket(AF_UNIX, SOCK_DGRAM, 0)) == -1) return;
	383	(void)fcntl(_sl_LogFile, F_SETFD, 1);
e9ce8d39 A	384	}
e9ce8d39 A	385	}
3d9156a7 A	386
	387	if ((_sl_LogFile != -1) && (_sl_connected == 0))
	388	{
	389	if (connect(_sl_LogFile, (struct sockaddr *)&SyslogAddr, sizeof(SyslogAddr)) == -1)
	390	{
	391	(void)close(_sl_LogFile);
	392	_sl_LogFile = -1;
	393	}
	394	else
	395	{
	396	_sl_connected = 1;
	397	}
	398	}
	399
	400	_sl_init_notify();
e9ce8d39 A	401	}
	402
	403	void
	404	closelog()
	405	{
3d9156a7 A	406	(void)close(_sl_LogFile);
	407	_sl_LogFile = -1;
	408	_sl_connected = 0;
e9ce8d39 A	409	}
	410
	411	/* setlogmask -- set the log mask level */
	412	int
	413	setlogmask(pmask)
	414	int pmask;
	415	{
	416	int omask;
	417
3d9156a7 A	418	omask = _sl_LogMask;
3d9156a7 A	419	if (pmask != 0) _sl_LogMask = pmask;
e9ce8d39 A	420	return (omask);
e9ce8d39 A	421	}
3d9156a7 A	422
3d9156a7 A	423	#endif /* !BUILDING_VARIANT */