[openssh.git] / log.c

/* $OpenBSD: log.c,v 1.36 2006/07/26 13:57:17 stevesk Exp $ */
/*
 * Author: Tatu Ylonen <ylo@cs.hut.fi>
 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
 *                    All rights reserved
 *
 * As far as I am concerned, the code I have written for this software
 * can be used freely for any purpose.  Any derived versions of this
 * software must be clearly marked as such, and if the derived work is
 * incompatible with the protocol description in the RFC file, it must be
 * called by a name other than "ssh" or "Secure Shell".
 */
/*
 * Copyright (c) 2000 Markus Friedl.  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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 "includes.h"

#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>
#if defined(HAVE_STRNVIS) && defined(HAVE_VIS_H)
# include <vis.h>
#endif

#include "log.h"
#include "xmalloc.h"

static LogLevel log_level = SYSLOG_LEVEL_INFO;
static int log_on_stderr = 1;
static int log_facility = LOG_AUTH;
static char *argv0;

extern char *__progname;

#define LOG_SYSLOG_VIS	(VIS_CSTYLE|VIS_NL|VIS_TAB|VIS_OCTAL)
#define LOG_STDERR_VIS	(VIS_SAFE|VIS_OCTAL)

/* textual representation of log-facilities/levels */

static struct {
	const char *name;
	SyslogFacility val;
} log_facilities[] = {
	{ "DAEMON",	SYSLOG_FACILITY_DAEMON },
	{ "USER",	SYSLOG_FACILITY_USER },
	{ "AUTH",	SYSLOG_FACILITY_AUTH },
#ifdef LOG_AUTHPRIV
	{ "AUTHPRIV",	SYSLOG_FACILITY_AUTHPRIV },
#endif
	{ "LOCAL0",	SYSLOG_FACILITY_LOCAL0 },
	{ "LOCAL1",	SYSLOG_FACILITY_LOCAL1 },
	{ "LOCAL2",	SYSLOG_FACILITY_LOCAL2 },
	{ "LOCAL3",	SYSLOG_FACILITY_LOCAL3 },
	{ "LOCAL4",	SYSLOG_FACILITY_LOCAL4 },
	{ "LOCAL5",	SYSLOG_FACILITY_LOCAL5 },
	{ "LOCAL6",	SYSLOG_FACILITY_LOCAL6 },
	{ "LOCAL7",	SYSLOG_FACILITY_LOCAL7 },
	{ NULL,		SYSLOG_FACILITY_NOT_SET }
};

static struct {
	const char *name;
	LogLevel val;
} log_levels[] =
{
	{ "QUIET",	SYSLOG_LEVEL_QUIET },
	{ "FATAL",	SYSLOG_LEVEL_FATAL },
	{ "ERROR",	SYSLOG_LEVEL_ERROR },
	{ "INFO",	SYSLOG_LEVEL_INFO },
	{ "VERBOSE",	SYSLOG_LEVEL_VERBOSE },
	{ "DEBUG",	SYSLOG_LEVEL_DEBUG1 },
	{ "DEBUG1",	SYSLOG_LEVEL_DEBUG1 },
	{ "DEBUG2",	SYSLOG_LEVEL_DEBUG2 },
	{ "DEBUG3",	SYSLOG_LEVEL_DEBUG3 },
	{ NULL,		SYSLOG_LEVEL_NOT_SET }
};

SyslogFacility
log_facility_number(char *name)
{
	int i;

	if (name != NULL)
		for (i = 0; log_facilities[i].name; i++)
			if (strcasecmp(log_facilities[i].name, name) == 0)
				return log_facilities[i].val;
	return SYSLOG_FACILITY_NOT_SET;
}

LogLevel
log_level_number(char *name)
{
	int i;

	if (name != NULL)
		for (i = 0; log_levels[i].name; i++)
			if (strcasecmp(log_levels[i].name, name) == 0)
				return log_levels[i].val;
	return SYSLOG_LEVEL_NOT_SET;
}

/* Error messages that should be logged. */

void
error(const char *fmt,...)
{
	va_list args;

	va_start(args, fmt);
	do_log(SYSLOG_LEVEL_ERROR, fmt, args);
	va_end(args);
}

/* Log this message (information that usually should go to the log). */

void
logit(const char *fmt,...)
{
	va_list args;

	va_start(args, fmt);
	do_log(SYSLOG_LEVEL_INFO, fmt, args);
	va_end(args);
}

/* More detailed messages (information that does not need to go to the log). */

void
verbose(const char *fmt,...)
{
	va_list args;

	va_start(args, fmt);
	do_log(SYSLOG_LEVEL_VERBOSE, fmt, args);
	va_end(args);
}

/* Debugging messages that should not be logged during normal operation. */

void
debug(const char *fmt,...)
{
	va_list args;

	va_start(args, fmt);
	do_log(SYSLOG_LEVEL_DEBUG1, fmt, args);
	va_end(args);
}

void
debug2(const char *fmt,...)
{
	va_list args;

	va_start(args, fmt);
	do_log(SYSLOG_LEVEL_DEBUG2, fmt, args);
	va_end(args);
}

void
debug3(const char *fmt,...)
{
	va_list args;

	va_start(args, fmt);
	do_log(SYSLOG_LEVEL_DEBUG3, fmt, args);
	va_end(args);
}

/*
 * Initialize the log.
 */

void
log_init(char *av0, LogLevel level, SyslogFacility facility, int on_stderr)
{
#if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
	struct syslog_data sdata = SYSLOG_DATA_INIT;
#endif

	argv0 = av0;

	switch (level) {
	case SYSLOG_LEVEL_QUIET:
	case SYSLOG_LEVEL_FATAL:
	case SYSLOG_LEVEL_ERROR:
	case SYSLOG_LEVEL_INFO:
	case SYSLOG_LEVEL_VERBOSE:
	case SYSLOG_LEVEL_DEBUG1:
	case SYSLOG_LEVEL_DEBUG2:
	case SYSLOG_LEVEL_DEBUG3:
		log_level = level;
		break;
	default:
		fprintf(stderr, "Unrecognized internal syslog level code %d\n",
		    (int) level);
		exit(1);
	}

	log_on_stderr = on_stderr;
	if (on_stderr)
		return;

	switch (facility) {
	case SYSLOG_FACILITY_DAEMON:
		log_facility = LOG_DAEMON;
		break;
	case SYSLOG_FACILITY_USER:
		log_facility = LOG_USER;
		break;
	case SYSLOG_FACILITY_AUTH:
		log_facility = LOG_AUTH;
		break;
#ifdef LOG_AUTHPRIV
	case SYSLOG_FACILITY_AUTHPRIV:
		log_facility = LOG_AUTHPRIV;
		break;
#endif
	case SYSLOG_FACILITY_LOCAL0:
		log_facility = LOG_LOCAL0;
		break;
	case SYSLOG_FACILITY_LOCAL1:
		log_facility = LOG_LOCAL1;
		break;
	case SYSLOG_FACILITY_LOCAL2:
		log_facility = LOG_LOCAL2;
		break;
	case SYSLOG_FACILITY_LOCAL3:
		log_facility = LOG_LOCAL3;
		break;
	case SYSLOG_FACILITY_LOCAL4:
		log_facility = LOG_LOCAL4;
		break;
	case SYSLOG_FACILITY_LOCAL5:
		log_facility = LOG_LOCAL5;
		break;
	case SYSLOG_FACILITY_LOCAL6:
		log_facility = LOG_LOCAL6;
		break;
	case SYSLOG_FACILITY_LOCAL7:
		log_facility = LOG_LOCAL7;
		break;
	default:
		fprintf(stderr,
		    "Unrecognized internal syslog facility code %d\n",
		    (int) facility);
		exit(1);
	}

	/*
	 * If an external library (eg libwrap) attempts to use syslog
	 * immediately after reexec, syslog may be pointing to the wrong
	 * facility, so we force an open/close of syslog here.
	 */
#if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
	openlog_r(argv0 ? argv0 : __progname, LOG_PID, log_facility, &sdata);
	closelog_r(&sdata);
#else
	openlog(argv0 ? argv0 : __progname, LOG_PID, log_facility);
	closelog();
#endif
}

#define MSGBUFSIZ 1024

void
do_log(LogLevel level, const char *fmt, va_list args)
{
#if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
	struct syslog_data sdata = SYSLOG_DATA_INIT;
#endif
	char msgbuf[MSGBUFSIZ];
	char fmtbuf[MSGBUFSIZ];
	char *txt = NULL;
	int pri = LOG_INFO;

	if (level > log_level)
		return;

	switch (level) {
	case SYSLOG_LEVEL_FATAL:
		if (!log_on_stderr)
			txt = "fatal";
		pri = LOG_CRIT;
		break;
	case SYSLOG_LEVEL_ERROR:
		if (!log_on_stderr)
			txt = "error";
		pri = LOG_ERR;
		break;
	case SYSLOG_LEVEL_INFO:
		pri = LOG_INFO;
		break;
	case SYSLOG_LEVEL_VERBOSE:
		pri = LOG_INFO;
		break;
	case SYSLOG_LEVEL_DEBUG1:
		txt = "debug1";
		pri = LOG_DEBUG;
		break;
	case SYSLOG_LEVEL_DEBUG2:
		txt = "debug2";
		pri = LOG_DEBUG;
		break;
	case SYSLOG_LEVEL_DEBUG3:
		txt = "debug3";
		pri = LOG_DEBUG;
		break;
	default:
		txt = "internal error";
		pri = LOG_ERR;
		break;
	}
	if (txt != NULL) {
		snprintf(fmtbuf, sizeof(fmtbuf), "%s: %s", txt, fmt);
		vsnprintf(msgbuf, sizeof(msgbuf), fmtbuf, args);
	} else {
		vsnprintf(msgbuf, sizeof(msgbuf), fmt, args);
	}
	strnvis(fmtbuf, msgbuf, sizeof(fmtbuf),
	    log_on_stderr ? LOG_STDERR_VIS : LOG_SYSLOG_VIS);
	if (log_on_stderr) {
		snprintf(msgbuf, sizeof msgbuf, "%s\r\n", fmtbuf);
		write(STDERR_FILENO, msgbuf, strlen(msgbuf));
	} else {
#if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
		openlog_r(argv0 ? argv0 : __progname, LOG_PID, log_facility, &sdata);
		syslog_r(pri, &sdata, "%.500s", fmtbuf);
		closelog_r(&sdata);
#else
		openlog(argv0 ? argv0 : __progname, LOG_PID, log_facility);
		syslog(pri, "%.500s", fmtbuf);
		closelog();
#endif
	}
}
Commit	Line	Data
ffa517a8	1	/* $OpenBSD: log.c,v 1.36 2006/07/26 13:57:17 stevesk Exp $ */
bcbf86ec	2	/*
	3	* Author: Tatu Ylonen <ylo@cs.hut.fi>
	4	* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
	5	* All rights reserved
	6	*
	7	* As far as I am concerned, the code I have written for this software
	8	* can be used freely for any purpose. Any derived versions of this
	9	* software must be clearly marked as such, and if the derived work is
	10	* incompatible with the protocol description in the RFC file, it must be
	11	* called by a name other than "ssh" or "Secure Shell".
	12	*/
6a17f9c2	13	/*
bcbf86ec	14	* Copyright (c) 2000 Markus Friedl. All rights reserved.
	15	*
	16	* Redistribution and use in source and binary forms, with or without
	17	* modification, are permitted provided that the following conditions
	18	* are met:
	19	* 1. Redistributions of source code must retain the above copyright
	20	* notice, this list of conditions and the following disclaimer.
	21	* 2. Redistributions in binary form must reproduce the above copyright
	22	* notice, this list of conditions and the following disclaimer in the
	23	* documentation and/or other materials provided with the distribution.
	24	*
	25	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	26	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	27	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	28	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	29	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	30	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	31	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	32	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	33	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	34	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
aa3378df	35	*/
6a17f9c2	36
6a17f9c2	37	#include "includes.h"
6a17f9c2	38
4c72fcfd	39	#include <stdarg.h>
ffa517a8	40	#include <stdlib.h>
00146caa	41	#include <string.h>
20244695	42	#include <syslog.h>
5188ba17	43	#include <unistd.h>
0a23d79f	44	#if defined(HAVE_STRNVIS) && defined(HAVE_VIS_H)
	45	# include <vis.h>
	46	#endif
20244695	47
ca1df159	48	#include "log.h"
	49	#include "xmalloc.h"
	50
20244695	51	static LogLevel log_level = SYSLOG_LEVEL_INFO;
	52	static int log_on_stderr = 1;
	53	static int log_facility = LOG_AUTH;
	54	static char *argv0;
	55
	56	extern char *__progname;
	57
ac87b3c2	58	#define LOG_SYSLOG_VIS (VIS_CSTYLE\|VIS_NL\|VIS_TAB\|VIS_OCTAL)
	59	#define LOG_STDERR_VIS (VIS_SAFE\|VIS_OCTAL)
	60
20244695	61	/* textual representation of log-facilities/levels */
	62
	63	static struct {
	64	const char *name;
	65	SyslogFacility val;
	66	} log_facilities[] = {
	67	{ "DAEMON", SYSLOG_FACILITY_DAEMON },
	68	{ "USER", SYSLOG_FACILITY_USER },
	69	{ "AUTH", SYSLOG_FACILITY_AUTH },
cc3067d6	70	#ifdef LOG_AUTHPRIV
	71	{ "AUTHPRIV", SYSLOG_FACILITY_AUTHPRIV },
	72	#endif
20244695	73	{ "LOCAL0", SYSLOG_FACILITY_LOCAL0 },
	74	{ "LOCAL1", SYSLOG_FACILITY_LOCAL1 },
	75	{ "LOCAL2", SYSLOG_FACILITY_LOCAL2 },
	76	{ "LOCAL3", SYSLOG_FACILITY_LOCAL3 },
	77	{ "LOCAL4", SYSLOG_FACILITY_LOCAL4 },
	78	{ "LOCAL5", SYSLOG_FACILITY_LOCAL5 },
	79	{ "LOCAL6", SYSLOG_FACILITY_LOCAL6 },
	80	{ "LOCAL7", SYSLOG_FACILITY_LOCAL7 },
5eaf8578	81	{ NULL, SYSLOG_FACILITY_NOT_SET }
20244695	82	};
	83
	84	static struct {
	85	const char *name;
	86	LogLevel val;
	87	} log_levels[] =
	88	{
	89	{ "QUIET", SYSLOG_LEVEL_QUIET },
	90	{ "FATAL", SYSLOG_LEVEL_FATAL },
	91	{ "ERROR", SYSLOG_LEVEL_ERROR },
	92	{ "INFO", SYSLOG_LEVEL_INFO },
	93	{ "VERBOSE", SYSLOG_LEVEL_VERBOSE },
	94	{ "DEBUG", SYSLOG_LEVEL_DEBUG1 },
	95	{ "DEBUG1", SYSLOG_LEVEL_DEBUG1 },
	96	{ "DEBUG2", SYSLOG_LEVEL_DEBUG2 },
	97	{ "DEBUG3", SYSLOG_LEVEL_DEBUG3 },
5eaf8578	98	{ NULL, SYSLOG_LEVEL_NOT_SET }
20244695	99	};
	100
	101	SyslogFacility
	102	log_facility_number(char *name)
	103	{
	104	int i;
4394a17f	105
20244695	106	if (name != NULL)
	107	for (i = 0; log_facilities[i].name; i++)
	108	if (strcasecmp(log_facilities[i].name, name) == 0)
	109	return log_facilities[i].val;
5eaf8578	110	return SYSLOG_FACILITY_NOT_SET;
20244695	111	}
	112
	113	LogLevel
	114	log_level_number(char *name)
	115	{
	116	int i;
4394a17f	117
20244695	118	if (name != NULL)
	119	for (i = 0; log_levels[i].name; i++)
	120	if (strcasecmp(log_levels[i].name, name) == 0)
	121	return log_levels[i].val;
5eaf8578	122	return SYSLOG_LEVEL_NOT_SET;
20244695	123	}
6a17f9c2	124
	125	/* Error messages that should be logged. */
	126
	127	void
5260325f	128	error(const char *fmt,...)
6a17f9c2	129	{
5260325f	130	va_list args;
4394a17f	131
5260325f	132	va_start(args, fmt);
	133	do_log(SYSLOG_LEVEL_ERROR, fmt, args);
	134	va_end(args);
6a17f9c2	135	}
	136
	137	/* Log this message (information that usually should go to the log). */
	138
	139	void
bbe88b6d	140	logit(const char *fmt,...)
6a17f9c2	141	{
5260325f	142	va_list args;
4394a17f	143
5260325f	144	va_start(args, fmt);
59c97189	145	do_log(SYSLOG_LEVEL_INFO, fmt, args);
5260325f	146	va_end(args);
6a17f9c2	147	}
	148
	149	/* More detailed messages (information that does not need to go to the log). */
	150
	151	void
5260325f	152	verbose(const char *fmt,...)
6a17f9c2	153	{
5260325f	154	va_list args;
4394a17f	155
5260325f	156	va_start(args, fmt);
	157	do_log(SYSLOG_LEVEL_VERBOSE, fmt, args);
	158	va_end(args);
6a17f9c2	159	}
	160
	161	/* Debugging messages that should not be logged during normal operation. */
	162
	163	void
5260325f	164	debug(const char *fmt,...)
6a17f9c2	165	{
5260325f	166	va_list args;
4394a17f	167
5260325f	168	va_start(args, fmt);
bcbf86ec	169	do_log(SYSLOG_LEVEL_DEBUG1, fmt, args);
	170	va_end(args);
	171	}
	172
	173	void
	174	debug2(const char *fmt,...)
	175	{
	176	va_list args;
4394a17f	177
bcbf86ec	178	va_start(args, fmt);
	179	do_log(SYSLOG_LEVEL_DEBUG2, fmt, args);
	180	va_end(args);
	181	}
	182
	183	void
	184	debug3(const char *fmt,...)
	185	{
	186	va_list args;
4394a17f	187
bcbf86ec	188	va_start(args, fmt);
bcbf86ec	189	do_log(SYSLOG_LEVEL_DEBUG3, fmt, args);
5260325f	190	va_end(args);
6a17f9c2	191	}
6a17f9c2	192
20244695	193	/*
	194	* Initialize the log.
	195	*/
9d6b7add	196
20244695	197	void
20244695	198	log_init(char *av0, LogLevel level, SyslogFacility facility, int on_stderr)
9d6b7add	199	{
29c82270	200	#if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
	201	struct syslog_data sdata = SYSLOG_DATA_INIT;
	202	#endif
9d6b7add	203
b1d73a9a	204	argv0 = av0;
b1d73a9a	205
20244695	206	switch (level) {
	207	case SYSLOG_LEVEL_QUIET:
	208	case SYSLOG_LEVEL_FATAL:
	209	case SYSLOG_LEVEL_ERROR:
	210	case SYSLOG_LEVEL_INFO:
	211	case SYSLOG_LEVEL_VERBOSE:
	212	case SYSLOG_LEVEL_DEBUG1:
	213	case SYSLOG_LEVEL_DEBUG2:
	214	case SYSLOG_LEVEL_DEBUG3:
	215	log_level = level;
	216	break;
	217	default:
0be033ea	218	fprintf(stderr, "Unrecognized internal syslog level code %d\n",
20244695	219	(int) level);
	220	exit(1);
	221	}
	222
	223	log_on_stderr = on_stderr;
	224	if (on_stderr)
	225	return;
	226
	227	switch (facility) {
	228	case SYSLOG_FACILITY_DAEMON:
	229	log_facility = LOG_DAEMON;
	230	break;
	231	case SYSLOG_FACILITY_USER:
	232	log_facility = LOG_USER;
	233	break;
	234	case SYSLOG_FACILITY_AUTH:
	235	log_facility = LOG_AUTH;
	236	break;
cc3067d6	237	#ifdef LOG_AUTHPRIV
	238	case SYSLOG_FACILITY_AUTHPRIV:
	239	log_facility = LOG_AUTHPRIV;
	240	break;
20244695	241	#endif
	242	case SYSLOG_FACILITY_LOCAL0:
	243	log_facility = LOG_LOCAL0;
	244	break;
	245	case SYSLOG_FACILITY_LOCAL1:
	246	log_facility = LOG_LOCAL1;
	247	break;
	248	case SYSLOG_FACILITY_LOCAL2:
	249	log_facility = LOG_LOCAL2;
	250	break;
	251	case SYSLOG_FACILITY_LOCAL3:
	252	log_facility = LOG_LOCAL3;
	253	break;
	254	case SYSLOG_FACILITY_LOCAL4:
	255	log_facility = LOG_LOCAL4;
	256	break;
	257	case SYSLOG_FACILITY_LOCAL5:
	258	log_facility = LOG_LOCAL5;
	259	break;
	260	case SYSLOG_FACILITY_LOCAL6:
	261	log_facility = LOG_LOCAL6;
	262	break;
	263	case SYSLOG_FACILITY_LOCAL7:
	264	log_facility = LOG_LOCAL7;
	265	break;
	266	default:
	267	fprintf(stderr,
0be033ea	268	"Unrecognized internal syslog facility code %d\n",
20244695	269	(int) facility);
	270	exit(1);
	271	}
29c82270	272
	273	/*
	274	* If an external library (eg libwrap) attempts to use syslog
	275	* immediately after reexec, syslog may be pointing to the wrong
	276	* facility, so we force an open/close of syslog here.
	277	*/
	278	#if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
	279	openlog_r(argv0 ? argv0 : __progname, LOG_PID, log_facility, &sdata);
	280	closelog_r(&sdata);
	281	#else
	282	openlog(argv0 ? argv0 : __progname, LOG_PID, log_facility);
	283	closelog();
	284	#endif
9d6b7add	285	}
9d6b7add	286
20244695	287	#define MSGBUFSIZ 1024
20244695	288
2bae80e9	289	void
20244695	290	do_log(LogLevel level, const char *fmt, va_list args)
9d6b7add	291	{
a90ed4b3	292	#if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
c453493f	293	struct syslog_data sdata = SYSLOG_DATA_INIT;
c453493f	294	#endif
20244695	295	char msgbuf[MSGBUFSIZ];
	296	char fmtbuf[MSGBUFSIZ];
	297	char *txt = NULL;
	298	int pri = LOG_INFO;
	299
	300	if (level > log_level)
	301	return;
	302
	303	switch (level) {
	304	case SYSLOG_LEVEL_FATAL:
	305	if (!log_on_stderr)
	306	txt = "fatal";
	307	pri = LOG_CRIT;
	308	break;
	309	case SYSLOG_LEVEL_ERROR:
	310	if (!log_on_stderr)
	311	txt = "error";
	312	pri = LOG_ERR;
	313	break;
	314	case SYSLOG_LEVEL_INFO:
	315	pri = LOG_INFO;
	316	break;
	317	case SYSLOG_LEVEL_VERBOSE:
	318	pri = LOG_INFO;
	319	break;
	320	case SYSLOG_LEVEL_DEBUG1:
	321	txt = "debug1";
	322	pri = LOG_DEBUG;
	323	break;
	324	case SYSLOG_LEVEL_DEBUG2:
	325	txt = "debug2";
	326	pri = LOG_DEBUG;
	327	break;
	328	case SYSLOG_LEVEL_DEBUG3:
	329	txt = "debug3";
	330	pri = LOG_DEBUG;
	331	break;
	332	default:
	333	txt = "internal error";
	334	pri = LOG_ERR;
	335	break;
	336	}
	337	if (txt != NULL) {
	338	snprintf(fmtbuf, sizeof(fmtbuf), "%s: %s", txt, fmt);
	339	vsnprintf(msgbuf, sizeof(msgbuf), fmtbuf, args);
	340	} else {
	341	vsnprintf(msgbuf, sizeof(msgbuf), fmt, args);
	342	}
ac87b3c2	343	strnvis(fmtbuf, msgbuf, sizeof(fmtbuf),
ac87b3c2	344	log_on_stderr ? LOG_STDERR_VIS : LOG_SYSLOG_VIS);
20244695	345	if (log_on_stderr) {
5b0fe364	346	snprintf(msgbuf, sizeof msgbuf, "%s\r\n", fmtbuf);
5b0fe364	347	write(STDERR_FILENO, msgbuf, strlen(msgbuf));
20244695	348	} else {
a90ed4b3	349	#if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
c453493f	350	openlog_r(argv0 ? argv0 : __progname, LOG_PID, log_facility, &sdata);
5b0fe364	351	syslog_r(pri, &sdata, "%.500s", fmtbuf);
c453493f	352	closelog_r(&sdata);
c453493f	353	#else
20244695	354	openlog(argv0 ? argv0 : __progname, LOG_PID, log_facility);
63cada0a	355	syslog(pri, "%.500s", fmtbuf);
20244695	356	closelog();
c453493f	357	#endif
20244695	358	}
9d6b7add	359	}