[openssh.git] / log.c

/*
 * 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"
RCSID("$OpenBSD: log.c,v 1.29 2003/09/23 20:17:11 markus Exp $");

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

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

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;

/* 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)
{
	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);
	}
}

#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), VIS_SAFE|VIS_OCTAL);
	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
bcbf86ec	1	/*
	2	* Author: Tatu Ylonen <ylo@cs.hut.fi>
	3	* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
	4	* All rights reserved
	5	*
	6	* As far as I am concerned, the code I have written for this software
	7	* can be used freely for any purpose. Any derived versions of this
	8	* software must be clearly marked as such, and if the derived work is
	9	* incompatible with the protocol description in the RFC file, it must be
	10	* called by a name other than "ssh" or "Secure Shell".
	11	*/
6a17f9c2	12	/*
bcbf86ec	13	* Copyright (c) 2000 Markus Friedl. All rights reserved.
	14	*
	15	* Redistribution and use in source and binary forms, with or without
	16	* modification, are permitted provided that the following conditions
	17	* are met:
	18	* 1. Redistributions of source code must retain the above copyright
	19	* notice, this list of conditions and the following disclaimer.
	20	* 2. Redistributions in binary form must reproduce the above copyright
	21	* notice, this list of conditions and the following disclaimer in the
	22	* documentation and/or other materials provided with the distribution.
	23	*
	24	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	25	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	26	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	27	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	28	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	29	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	30	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	31	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	32	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	33	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
aa3378df	34	*/
6a17f9c2	35
6a17f9c2	36	#include "includes.h"
2362db19	37	RCSID("$OpenBSD: log.c,v 1.29 2003/09/23 20:17:11 markus Exp $");
6a17f9c2	38
42f11eb2	39	#include "log.h"
6a17f9c2	40	#include "xmalloc.h"
6a17f9c2	41
20244695	42	#include <syslog.h>
0a23d79f	43	#if defined(HAVE_STRNVIS) && defined(HAVE_VIS_H)
	44	# include <vis.h>
	45	#endif
20244695	46
	47	static LogLevel log_level = SYSLOG_LEVEL_INFO;
	48	static int log_on_stderr = 1;
	49	static int log_facility = LOG_AUTH;
	50	static char *argv0;
	51
	52	extern char *__progname;
	53
	54	/* textual representation of log-facilities/levels */
	55
	56	static struct {
	57	const char *name;
	58	SyslogFacility val;
	59	} log_facilities[] = {
	60	{ "DAEMON", SYSLOG_FACILITY_DAEMON },
	61	{ "USER", SYSLOG_FACILITY_USER },
	62	{ "AUTH", SYSLOG_FACILITY_AUTH },
cc3067d6	63	#ifdef LOG_AUTHPRIV
	64	{ "AUTHPRIV", SYSLOG_FACILITY_AUTHPRIV },
	65	#endif
20244695	66	{ "LOCAL0", SYSLOG_FACILITY_LOCAL0 },
	67	{ "LOCAL1", SYSLOG_FACILITY_LOCAL1 },
	68	{ "LOCAL2", SYSLOG_FACILITY_LOCAL2 },
	69	{ "LOCAL3", SYSLOG_FACILITY_LOCAL3 },
	70	{ "LOCAL4", SYSLOG_FACILITY_LOCAL4 },
	71	{ "LOCAL5", SYSLOG_FACILITY_LOCAL5 },
	72	{ "LOCAL6", SYSLOG_FACILITY_LOCAL6 },
	73	{ "LOCAL7", SYSLOG_FACILITY_LOCAL7 },
5eaf8578	74	{ NULL, SYSLOG_FACILITY_NOT_SET }
20244695	75	};
	76
	77	static struct {
	78	const char *name;
	79	LogLevel val;
	80	} log_levels[] =
	81	{
	82	{ "QUIET", SYSLOG_LEVEL_QUIET },
	83	{ "FATAL", SYSLOG_LEVEL_FATAL },
	84	{ "ERROR", SYSLOG_LEVEL_ERROR },
	85	{ "INFO", SYSLOG_LEVEL_INFO },
	86	{ "VERBOSE", SYSLOG_LEVEL_VERBOSE },
	87	{ "DEBUG", SYSLOG_LEVEL_DEBUG1 },
	88	{ "DEBUG1", SYSLOG_LEVEL_DEBUG1 },
	89	{ "DEBUG2", SYSLOG_LEVEL_DEBUG2 },
	90	{ "DEBUG3", SYSLOG_LEVEL_DEBUG3 },
5eaf8578	91	{ NULL, SYSLOG_LEVEL_NOT_SET }
20244695	92	};
	93
	94	SyslogFacility
	95	log_facility_number(char *name)
	96	{
	97	int i;
4394a17f	98
20244695	99	if (name != NULL)
	100	for (i = 0; log_facilities[i].name; i++)
	101	if (strcasecmp(log_facilities[i].name, name) == 0)
	102	return log_facilities[i].val;
5eaf8578	103	return SYSLOG_FACILITY_NOT_SET;
20244695	104	}
	105
	106	LogLevel
	107	log_level_number(char *name)
	108	{
	109	int i;
4394a17f	110
20244695	111	if (name != NULL)
	112	for (i = 0; log_levels[i].name; i++)
	113	if (strcasecmp(log_levels[i].name, name) == 0)
	114	return log_levels[i].val;
5eaf8578	115	return SYSLOG_LEVEL_NOT_SET;
20244695	116	}
6a17f9c2	117
	118	/* Error messages that should be logged. */
	119
	120	void
5260325f	121	error(const char *fmt,...)
6a17f9c2	122	{
5260325f	123	va_list args;
4394a17f	124
5260325f	125	va_start(args, fmt);
	126	do_log(SYSLOG_LEVEL_ERROR, fmt, args);
	127	va_end(args);
6a17f9c2	128	}
	129
	130	/* Log this message (information that usually should go to the log). */
	131
	132	void
bbe88b6d	133	logit(const char *fmt,...)
6a17f9c2	134	{
5260325f	135	va_list args;
4394a17f	136
5260325f	137	va_start(args, fmt);
59c97189	138	do_log(SYSLOG_LEVEL_INFO, fmt, args);
5260325f	139	va_end(args);
6a17f9c2	140	}
	141
	142	/* More detailed messages (information that does not need to go to the log). */
	143
	144	void
5260325f	145	verbose(const char *fmt,...)
6a17f9c2	146	{
5260325f	147	va_list args;
4394a17f	148
5260325f	149	va_start(args, fmt);
	150	do_log(SYSLOG_LEVEL_VERBOSE, fmt, args);
	151	va_end(args);
6a17f9c2	152	}
	153
	154	/* Debugging messages that should not be logged during normal operation. */
	155
	156	void
5260325f	157	debug(const char *fmt,...)
6a17f9c2	158	{
5260325f	159	va_list args;
4394a17f	160
5260325f	161	va_start(args, fmt);
bcbf86ec	162	do_log(SYSLOG_LEVEL_DEBUG1, fmt, args);
	163	va_end(args);
	164	}
	165
	166	void
	167	debug2(const char *fmt,...)
	168	{
	169	va_list args;
4394a17f	170
bcbf86ec	171	va_start(args, fmt);
	172	do_log(SYSLOG_LEVEL_DEBUG2, fmt, args);
	173	va_end(args);
	174	}
	175
	176	void
	177	debug3(const char *fmt,...)
	178	{
	179	va_list args;
4394a17f	180
bcbf86ec	181	va_start(args, fmt);
bcbf86ec	182	do_log(SYSLOG_LEVEL_DEBUG3, fmt, args);
5260325f	183	va_end(args);
6a17f9c2	184	}
6a17f9c2	185
20244695	186	/*
	187	* Initialize the log.
	188	*/
9d6b7add	189
20244695	190	void
20244695	191	log_init(char *av0, LogLevel level, SyslogFacility facility, int on_stderr)
9d6b7add	192	{
20244695	193	argv0 = av0;
9d6b7add	194
20244695	195	switch (level) {
	196	case SYSLOG_LEVEL_QUIET:
	197	case SYSLOG_LEVEL_FATAL:
	198	case SYSLOG_LEVEL_ERROR:
	199	case SYSLOG_LEVEL_INFO:
	200	case SYSLOG_LEVEL_VERBOSE:
	201	case SYSLOG_LEVEL_DEBUG1:
	202	case SYSLOG_LEVEL_DEBUG2:
	203	case SYSLOG_LEVEL_DEBUG3:
	204	log_level = level;
	205	break;
	206	default:
0be033ea	207	fprintf(stderr, "Unrecognized internal syslog level code %d\n",
20244695	208	(int) level);
	209	exit(1);
	210	}
	211
	212	log_on_stderr = on_stderr;
	213	if (on_stderr)
	214	return;
	215
	216	switch (facility) {
	217	case SYSLOG_FACILITY_DAEMON:
	218	log_facility = LOG_DAEMON;
	219	break;
	220	case SYSLOG_FACILITY_USER:
	221	log_facility = LOG_USER;
	222	break;
	223	case SYSLOG_FACILITY_AUTH:
	224	log_facility = LOG_AUTH;
	225	break;
cc3067d6	226	#ifdef LOG_AUTHPRIV
	227	case SYSLOG_FACILITY_AUTHPRIV:
	228	log_facility = LOG_AUTHPRIV;
	229	break;
20244695	230	#endif
	231	case SYSLOG_FACILITY_LOCAL0:
	232	log_facility = LOG_LOCAL0;
	233	break;
	234	case SYSLOG_FACILITY_LOCAL1:
	235	log_facility = LOG_LOCAL1;
	236	break;
	237	case SYSLOG_FACILITY_LOCAL2:
	238	log_facility = LOG_LOCAL2;
	239	break;
	240	case SYSLOG_FACILITY_LOCAL3:
	241	log_facility = LOG_LOCAL3;
	242	break;
	243	case SYSLOG_FACILITY_LOCAL4:
	244	log_facility = LOG_LOCAL4;
	245	break;
	246	case SYSLOG_FACILITY_LOCAL5:
	247	log_facility = LOG_LOCAL5;
	248	break;
	249	case SYSLOG_FACILITY_LOCAL6:
	250	log_facility = LOG_LOCAL6;
	251	break;
	252	case SYSLOG_FACILITY_LOCAL7:
	253	log_facility = LOG_LOCAL7;
	254	break;
	255	default:
	256	fprintf(stderr,
0be033ea	257	"Unrecognized internal syslog facility code %d\n",
20244695	258	(int) facility);
	259	exit(1);
	260	}
9d6b7add	261	}
9d6b7add	262
20244695	263	#define MSGBUFSIZ 1024
20244695	264
2bae80e9	265	void
20244695	266	do_log(LogLevel level, const char *fmt, va_list args)
9d6b7add	267	{
a90ed4b3	268	#if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
c453493f	269	struct syslog_data sdata = SYSLOG_DATA_INIT;
c453493f	270	#endif
20244695	271	char msgbuf[MSGBUFSIZ];
	272	char fmtbuf[MSGBUFSIZ];
	273	char *txt = NULL;
	274	int pri = LOG_INFO;
	275
	276	if (level > log_level)
	277	return;
	278
	279	switch (level) {
	280	case SYSLOG_LEVEL_FATAL:
	281	if (!log_on_stderr)
	282	txt = "fatal";
	283	pri = LOG_CRIT;
	284	break;
	285	case SYSLOG_LEVEL_ERROR:
	286	if (!log_on_stderr)
	287	txt = "error";
	288	pri = LOG_ERR;
	289	break;
	290	case SYSLOG_LEVEL_INFO:
	291	pri = LOG_INFO;
	292	break;
	293	case SYSLOG_LEVEL_VERBOSE:
	294	pri = LOG_INFO;
	295	break;
	296	case SYSLOG_LEVEL_DEBUG1:
	297	txt = "debug1";
	298	pri = LOG_DEBUG;
	299	break;
	300	case SYSLOG_LEVEL_DEBUG2:
	301	txt = "debug2";
	302	pri = LOG_DEBUG;
	303	break;
	304	case SYSLOG_LEVEL_DEBUG3:
	305	txt = "debug3";
	306	pri = LOG_DEBUG;
	307	break;
	308	default:
	309	txt = "internal error";
	310	pri = LOG_ERR;
	311	break;
	312	}
	313	if (txt != NULL) {
	314	snprintf(fmtbuf, sizeof(fmtbuf), "%s: %s", txt, fmt);
	315	vsnprintf(msgbuf, sizeof(msgbuf), fmtbuf, args);
	316	} else {
	317	vsnprintf(msgbuf, sizeof(msgbuf), fmt, args);
	318	}
d83ebe4a	319	strnvis(fmtbuf, msgbuf, sizeof(fmtbuf), VIS_SAFE\|VIS_OCTAL);
20244695	320	if (log_on_stderr) {
5b0fe364	321	snprintf(msgbuf, sizeof msgbuf, "%s\r\n", fmtbuf);
5b0fe364	322	write(STDERR_FILENO, msgbuf, strlen(msgbuf));
20244695	323	} else {
a90ed4b3	324	#if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
c453493f	325	openlog_r(argv0 ? argv0 : __progname, LOG_PID, log_facility, &sdata);
5b0fe364	326	syslog_r(pri, &sdata, "%.500s", fmtbuf);
c453493f	327	closelog_r(&sdata);
c453493f	328	#else
20244695	329	openlog(argv0 ? argv0 : __progname, LOG_PID, log_facility);
63cada0a	330	syslog(pri, "%.500s", fmtbuf);
20244695	331	closelog();
c453493f	332	#endif
20244695	333	}
9d6b7add	334	}