[openssh.git] / log.c

/* $OpenBSD: log.c,v 1.41 2008/06/10 04:50:25 dtucker 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 <sys/types.h>

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

#include "xmalloc.h"
#include "log.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;
}

const char *
log_facility_name(SyslogFacility facility)
{
	u_int i;

	for (i = 0;  log_facilities[i].name; i++)
		if (log_facilities[i].val == facility)
			return log_facilities[i].name;
	return NULL;
}

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;
}

const char *
log_level_name(LogLevel level)
{
	u_int i;

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

/* 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);
}

void
sigdie(const char *fmt,...)
{
#ifdef DO_LOG_SAFE_IN_SIGHAND
	va_list args;

	va_start(args, fmt);
	do_log(SYSLOG_LEVEL_FATAL, fmt, args);
	va_end(args);
#endif
	_exit(1);
}


/* 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;
	int saved_errno = errno;

	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
	}
	errno = saved_errno;
}
Commit	Line	Data
1760c982	1	/* $OpenBSD: log.c,v 1.41 2008/06/10 04:50:25 dtucker 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
31652869	39	#include <sys/types.h>
31652869	40
4c72fcfd	41	#include <stdarg.h>
cf851879	42	#include <stdio.h>
ffa517a8	43	#include <stdlib.h>
00146caa	44	#include <string.h>
20244695	45	#include <syslog.h>
5188ba17	46	#include <unistd.h>
7ce05acc	47	#include <errno.h>
0a23d79f	48	#if defined(HAVE_STRNVIS) && defined(HAVE_VIS_H)
	49	# include <vis.h>
	50	#endif
20244695	51
ca1df159	52	#include "xmalloc.h"
31652869	53	#include "log.h"
ca1df159	54
20244695	55	static LogLevel log_level = SYSLOG_LEVEL_INFO;
	56	static int log_on_stderr = 1;
	57	static int log_facility = LOG_AUTH;
	58	static char *argv0;
	59
	60	extern char *__progname;
	61
ac87b3c2	62	#define LOG_SYSLOG_VIS (VIS_CSTYLE\|VIS_NL\|VIS_TAB\|VIS_OCTAL)
	63	#define LOG_STDERR_VIS (VIS_SAFE\|VIS_OCTAL)
	64
20244695	65	/* textual representation of log-facilities/levels */
	66
	67	static struct {
	68	const char *name;
	69	SyslogFacility val;
	70	} log_facilities[] = {
	71	{ "DAEMON", SYSLOG_FACILITY_DAEMON },
	72	{ "USER", SYSLOG_FACILITY_USER },
	73	{ "AUTH", SYSLOG_FACILITY_AUTH },
cc3067d6	74	#ifdef LOG_AUTHPRIV
	75	{ "AUTHPRIV", SYSLOG_FACILITY_AUTHPRIV },
	76	#endif
20244695	77	{ "LOCAL0", SYSLOG_FACILITY_LOCAL0 },
	78	{ "LOCAL1", SYSLOG_FACILITY_LOCAL1 },
	79	{ "LOCAL2", SYSLOG_FACILITY_LOCAL2 },
	80	{ "LOCAL3", SYSLOG_FACILITY_LOCAL3 },
	81	{ "LOCAL4", SYSLOG_FACILITY_LOCAL4 },
	82	{ "LOCAL5", SYSLOG_FACILITY_LOCAL5 },
	83	{ "LOCAL6", SYSLOG_FACILITY_LOCAL6 },
	84	{ "LOCAL7", SYSLOG_FACILITY_LOCAL7 },
5eaf8578	85	{ NULL, SYSLOG_FACILITY_NOT_SET }
20244695	86	};
	87
	88	static struct {
	89	const char *name;
	90	LogLevel val;
	91	} log_levels[] =
	92	{
	93	{ "QUIET", SYSLOG_LEVEL_QUIET },
	94	{ "FATAL", SYSLOG_LEVEL_FATAL },
	95	{ "ERROR", SYSLOG_LEVEL_ERROR },
	96	{ "INFO", SYSLOG_LEVEL_INFO },
	97	{ "VERBOSE", SYSLOG_LEVEL_VERBOSE },
	98	{ "DEBUG", SYSLOG_LEVEL_DEBUG1 },
	99	{ "DEBUG1", SYSLOG_LEVEL_DEBUG1 },
	100	{ "DEBUG2", SYSLOG_LEVEL_DEBUG2 },
	101	{ "DEBUG3", SYSLOG_LEVEL_DEBUG3 },
5eaf8578	102	{ NULL, SYSLOG_LEVEL_NOT_SET }
20244695	103	};
	104
	105	SyslogFacility
	106	log_facility_number(char *name)
	107	{
	108	int i;
4394a17f	109
20244695	110	if (name != NULL)
	111	for (i = 0; log_facilities[i].name; i++)
	112	if (strcasecmp(log_facilities[i].name, name) == 0)
	113	return log_facilities[i].val;
5eaf8578	114	return SYSLOG_FACILITY_NOT_SET;
20244695	115	}
20244695	116
1760c982	117	const char *
	118	log_facility_name(SyslogFacility facility)
	119	{
	120	u_int i;
	121
	122	for (i = 0; log_facilities[i].name; i++)
	123	if (log_facilities[i].val == facility)
	124	return log_facilities[i].name;
	125	return NULL;
	126	}
	127
20244695	128	LogLevel
	129	log_level_number(char *name)
	130	{
	131	int i;
4394a17f	132
20244695	133	if (name != NULL)
	134	for (i = 0; log_levels[i].name; i++)
	135	if (strcasecmp(log_levels[i].name, name) == 0)
	136	return log_levels[i].val;
5eaf8578	137	return SYSLOG_LEVEL_NOT_SET;
20244695	138	}
6a17f9c2	139
1760c982	140	const char *
	141	log_level_name(LogLevel level)
	142	{
	143	u_int i;
	144
	145	for (i = 0; log_levels[i].name != NULL; i++)
	146	if (log_levels[i].val == level)
	147	return log_levels[i].name;
	148	return NULL;
	149	}
	150
6a17f9c2	151	/* Error messages that should be logged. */
	152
	153	void
5260325f	154	error(const char *fmt,...)
6a17f9c2	155	{
5260325f	156	va_list args;
4394a17f	157
5260325f	158	va_start(args, fmt);
	159	do_log(SYSLOG_LEVEL_ERROR, fmt, args);
	160	va_end(args);
6a17f9c2	161	}
6a17f9c2	162
28463427	163	void
	164	sigdie(const char *fmt,...)
	165	{
9895d518	166	#ifdef DO_LOG_SAFE_IN_SIGHAND
28463427	167	va_list args;
	168
	169	va_start(args, fmt);
	170	do_log(SYSLOG_LEVEL_FATAL, fmt, args);
	171	va_end(args);
c79c4814	172	#endif
28463427	173	_exit(1);
	174	}
	175
	176
6a17f9c2	177	/* Log this message (information that usually should go to the log). */
	178
	179	void
bbe88b6d	180	logit(const char *fmt,...)
6a17f9c2	181	{
5260325f	182	va_list args;
4394a17f	183
5260325f	184	va_start(args, fmt);
59c97189	185	do_log(SYSLOG_LEVEL_INFO, fmt, args);
5260325f	186	va_end(args);
6a17f9c2	187	}
	188
	189	/* More detailed messages (information that does not need to go to the log). */
	190
	191	void
5260325f	192	verbose(const char *fmt,...)
6a17f9c2	193	{
5260325f	194	va_list args;
4394a17f	195
5260325f	196	va_start(args, fmt);
	197	do_log(SYSLOG_LEVEL_VERBOSE, fmt, args);
	198	va_end(args);
6a17f9c2	199	}
	200
	201	/* Debugging messages that should not be logged during normal operation. */
	202
	203	void
5260325f	204	debug(const char *fmt,...)
6a17f9c2	205	{
5260325f	206	va_list args;
4394a17f	207
5260325f	208	va_start(args, fmt);
bcbf86ec	209	do_log(SYSLOG_LEVEL_DEBUG1, fmt, args);
	210	va_end(args);
	211	}
	212
	213	void
	214	debug2(const char *fmt,...)
	215	{
	216	va_list args;
4394a17f	217
bcbf86ec	218	va_start(args, fmt);
	219	do_log(SYSLOG_LEVEL_DEBUG2, fmt, args);
	220	va_end(args);
	221	}
	222
	223	void
	224	debug3(const char *fmt,...)
	225	{
	226	va_list args;
4394a17f	227
bcbf86ec	228	va_start(args, fmt);
bcbf86ec	229	do_log(SYSLOG_LEVEL_DEBUG3, fmt, args);
5260325f	230	va_end(args);
6a17f9c2	231	}
6a17f9c2	232
20244695	233	/*
	234	* Initialize the log.
	235	*/
9d6b7add	236
20244695	237	void
20244695	238	log_init(char *av0, LogLevel level, SyslogFacility facility, int on_stderr)
9d6b7add	239	{
29c82270	240	#if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
	241	struct syslog_data sdata = SYSLOG_DATA_INIT;
	242	#endif
9d6b7add	243
b1d73a9a	244	argv0 = av0;
b1d73a9a	245
20244695	246	switch (level) {
	247	case SYSLOG_LEVEL_QUIET:
	248	case SYSLOG_LEVEL_FATAL:
	249	case SYSLOG_LEVEL_ERROR:
	250	case SYSLOG_LEVEL_INFO:
	251	case SYSLOG_LEVEL_VERBOSE:
	252	case SYSLOG_LEVEL_DEBUG1:
	253	case SYSLOG_LEVEL_DEBUG2:
	254	case SYSLOG_LEVEL_DEBUG3:
	255	log_level = level;
	256	break;
	257	default:
0be033ea	258	fprintf(stderr, "Unrecognized internal syslog level code %d\n",
20244695	259	(int) level);
	260	exit(1);
	261	}
	262
	263	log_on_stderr = on_stderr;
	264	if (on_stderr)
	265	return;
	266
	267	switch (facility) {
	268	case SYSLOG_FACILITY_DAEMON:
	269	log_facility = LOG_DAEMON;
	270	break;
	271	case SYSLOG_FACILITY_USER:
	272	log_facility = LOG_USER;
	273	break;
	274	case SYSLOG_FACILITY_AUTH:
	275	log_facility = LOG_AUTH;
	276	break;
cc3067d6	277	#ifdef LOG_AUTHPRIV
	278	case SYSLOG_FACILITY_AUTHPRIV:
	279	log_facility = LOG_AUTHPRIV;
	280	break;
20244695	281	#endif
	282	case SYSLOG_FACILITY_LOCAL0:
	283	log_facility = LOG_LOCAL0;
	284	break;
	285	case SYSLOG_FACILITY_LOCAL1:
	286	log_facility = LOG_LOCAL1;
	287	break;
	288	case SYSLOG_FACILITY_LOCAL2:
	289	log_facility = LOG_LOCAL2;
	290	break;
	291	case SYSLOG_FACILITY_LOCAL3:
	292	log_facility = LOG_LOCAL3;
	293	break;
	294	case SYSLOG_FACILITY_LOCAL4:
	295	log_facility = LOG_LOCAL4;
	296	break;
	297	case SYSLOG_FACILITY_LOCAL5:
	298	log_facility = LOG_LOCAL5;
	299	break;
	300	case SYSLOG_FACILITY_LOCAL6:
	301	log_facility = LOG_LOCAL6;
	302	break;
	303	case SYSLOG_FACILITY_LOCAL7:
	304	log_facility = LOG_LOCAL7;
	305	break;
	306	default:
	307	fprintf(stderr,
0be033ea	308	"Unrecognized internal syslog facility code %d\n",
20244695	309	(int) facility);
	310	exit(1);
	311	}
29c82270	312
	313	/*
	314	* If an external library (eg libwrap) attempts to use syslog
	315	* immediately after reexec, syslog may be pointing to the wrong
	316	* facility, so we force an open/close of syslog here.
	317	*/
	318	#if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
	319	openlog_r(argv0 ? argv0 : __progname, LOG_PID, log_facility, &sdata);
	320	closelog_r(&sdata);
	321	#else
	322	openlog(argv0 ? argv0 : __progname, LOG_PID, log_facility);
	323	closelog();
	324	#endif
9d6b7add	325	}
9d6b7add	326
20244695	327	#define MSGBUFSIZ 1024
20244695	328
2bae80e9	329	void
20244695	330	do_log(LogLevel level, const char *fmt, va_list args)
9d6b7add	331	{
a90ed4b3	332	#if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
c453493f	333	struct syslog_data sdata = SYSLOG_DATA_INIT;
c453493f	334	#endif
20244695	335	char msgbuf[MSGBUFSIZ];
	336	char fmtbuf[MSGBUFSIZ];
	337	char *txt = NULL;
	338	int pri = LOG_INFO;
7ce05acc	339	int saved_errno = errno;
20244695	340
	341	if (level > log_level)
	342	return;
	343
	344	switch (level) {
	345	case SYSLOG_LEVEL_FATAL:
	346	if (!log_on_stderr)
	347	txt = "fatal";
	348	pri = LOG_CRIT;
	349	break;
	350	case SYSLOG_LEVEL_ERROR:
	351	if (!log_on_stderr)
	352	txt = "error";
	353	pri = LOG_ERR;
	354	break;
	355	case SYSLOG_LEVEL_INFO:
	356	pri = LOG_INFO;
	357	break;
	358	case SYSLOG_LEVEL_VERBOSE:
	359	pri = LOG_INFO;
	360	break;
	361	case SYSLOG_LEVEL_DEBUG1:
	362	txt = "debug1";
	363	pri = LOG_DEBUG;
	364	break;
	365	case SYSLOG_LEVEL_DEBUG2:
	366	txt = "debug2";
	367	pri = LOG_DEBUG;
	368	break;
	369	case SYSLOG_LEVEL_DEBUG3:
	370	txt = "debug3";
	371	pri = LOG_DEBUG;
	372	break;
	373	default:
	374	txt = "internal error";
	375	pri = LOG_ERR;
	376	break;
	377	}
	378	if (txt != NULL) {
	379	snprintf(fmtbuf, sizeof(fmtbuf), "%s: %s", txt, fmt);
	380	vsnprintf(msgbuf, sizeof(msgbuf), fmtbuf, args);
	381	} else {
	382	vsnprintf(msgbuf, sizeof(msgbuf), fmt, args);
	383	}
ac87b3c2	384	strnvis(fmtbuf, msgbuf, sizeof(fmtbuf),
ac87b3c2	385	log_on_stderr ? LOG_STDERR_VIS : LOG_SYSLOG_VIS);
20244695	386	if (log_on_stderr) {
5b0fe364	387	snprintf(msgbuf, sizeof msgbuf, "%s\r\n", fmtbuf);
5b0fe364	388	write(STDERR_FILENO, msgbuf, strlen(msgbuf));
20244695	389	} else {
a90ed4b3	390	#if defined(HAVE_OPENLOG_R) && defined(SYSLOG_DATA_INIT)
c453493f	391	openlog_r(argv0 ? argv0 : __progname, LOG_PID, log_facility, &sdata);
5b0fe364	392	syslog_r(pri, &sdata, "%.500s", fmtbuf);
c453493f	393	closelog_r(&sdata);
c453493f	394	#else
20244695	395	openlog(argv0 ? argv0 : __progname, LOG_PID, log_facility);
63cada0a	396	syslog(pri, "%.500s", fmtbuf);
20244695	397	closelog();
c453493f	398	#endif
20244695	399	}
7ce05acc	400	errno = saved_errno;
9d6b7add	401	}