[gssapi-openssh.git] / openssh / 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 1.18 2001/06/26 17:27:23 markus Exp $");

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

#include <syslog.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;

/* 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, 0 }
};

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, 0 }
};

static void	 do_log(LogLevel level, const char *fmt, va_list args);

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 (SyslogFacility) - 1;
}

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 (LogLevel) - 1;
}
/* Fatal messages.  This function never returns. */

void
fatal(const char *fmt,...)
{
	va_list args;
	va_start(args, fmt);
	do_log(SYSLOG_LEVEL_FATAL, fmt, args);
	va_end(args);
	fatal_cleanup();
}

/* 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
log(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);
}

/* Fatal cleanup */

struct fatal_cleanup {
	struct fatal_cleanup *next;
	void (*proc) (void *);
	void *context;
};

static struct fatal_cleanup *fatal_cleanups = NULL;

/* Registers a cleanup function to be called by fatal() before exiting. */

void
fatal_add_cleanup(void (*proc) (void *), void *context)
{
	struct fatal_cleanup *cu;

	cu = xmalloc(sizeof(*cu));
	cu->proc = proc;
	cu->context = context;
	cu->next = fatal_cleanups;
	fatal_cleanups = cu;
}

/* Removes a cleanup frunction to be called at fatal(). */

void
fatal_remove_cleanup(void (*proc) (void *context), void *context)
{
	struct fatal_cleanup **cup, *cu;

	for (cup = &fatal_cleanups; *cup; cup = &cu->next) {
		cu = *cup;
		if (cu->proc == proc && cu->context == context) {
			*cup = cu->next;
			xfree(cu);
			return;
		}
	}
	fatal("fatal_remove_cleanup: no such cleanup function: 0x%lx 0x%lx",
	    (u_long) proc, (u_long) context);
}

/* Cleanup and exit */
void
fatal_cleanup(void)
{
	struct fatal_cleanup *cu, *next_cu;
	static int called = 0;

	if (called)
		exit(255);
	called = 1;
	/* Call cleanup functions. */
	for (cu = fatal_cleanups; cu; cu = next_cu) {
		next_cu = cu->next;
		debug("Calling cleanup 0x%lx(0x%lx)",
		      (u_long) cu->proc, (u_long) cu->context);
		(*cu->proc) (cu->context);
	}
	exit(255);
}


/*
 * 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

static void
do_log(LogLevel level, const char *fmt, va_list args)
{
	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);
	}
	if (log_on_stderr) {
		fprintf(stderr, "%s\r\n", msgbuf);
	} else {
		openlog(argv0 ? argv0 : __progname, LOG_PID, log_facility);
		syslog(pri, "%.500s", msgbuf);
		closelog();
	}
}
Commit	Line	Data
3c0ef626	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	*/
	12	/*
	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.
	34	*/
	35
	36	#include "includes.h"
	37	RCSID("$OpenBSD: log.c,v 1.18 2001/06/26 17:27:23 markus Exp $");
	38
	39	#include "log.h"
	40	#include "xmalloc.h"
	41
	42	#include <syslog.h>
	43
	44	static LogLevel log_level = SYSLOG_LEVEL_INFO;
	45	static int log_on_stderr = 1;
	46	static int log_facility = LOG_AUTH;
	47	static char *argv0;
	48
	49	extern char *__progname;
	50
	51	/* textual representation of log-facilities/levels */
	52
	53	static struct {
	54	const char *name;
	55	SyslogFacility val;
	56	} log_facilities[] = {
	57	{ "DAEMON", SYSLOG_FACILITY_DAEMON },
	58	{ "USER", SYSLOG_FACILITY_USER },
	59	{ "AUTH", SYSLOG_FACILITY_AUTH },
	60	#ifdef LOG_AUTHPRIV
	61	{ "AUTHPRIV", SYSLOG_FACILITY_AUTHPRIV },
	62	#endif
	63	{ "LOCAL0", SYSLOG_FACILITY_LOCAL0 },
	64	{ "LOCAL1", SYSLOG_FACILITY_LOCAL1 },
65	{ "LOCAL2", SYSLOG_FACILITY_LOCAL2 },
66	{ "LOCAL3", SYSLOG_FACILITY_LOCAL3 },
67	{ "LOCAL4", SYSLOG_FACILITY_LOCAL4 },
68	{ "LOCAL5", SYSLOG_FACILITY_LOCAL5 },
69	{ "LOCAL6", SYSLOG_FACILITY_LOCAL6 },
70	{ "LOCAL7", SYSLOG_FACILITY_LOCAL7 },
71	{ NULL, 0 }
72	};
73
74	static struct {
75	const char *name;
76	LogLevel val;
77	} log_levels[] =
78	{
79	{ "QUIET", SYSLOG_LEVEL_QUIET },
80	{ "FATAL", SYSLOG_LEVEL_FATAL },
81	{ "ERROR", SYSLOG_LEVEL_ERROR },
82	{ "INFO", SYSLOG_LEVEL_INFO },
83	{ "VERBOSE", SYSLOG_LEVEL_VERBOSE },
84	{ "DEBUG", SYSLOG_LEVEL_DEBUG1 },
85	{ "DEBUG1", SYSLOG_LEVEL_DEBUG1 },
86	{ "DEBUG2", SYSLOG_LEVEL_DEBUG2 },
87	{ "DEBUG3", SYSLOG_LEVEL_DEBUG3 },
88	{ NULL, 0 }
89	};
90
91	static void do_log(LogLevel level, const char *fmt, va_list args);
92
93	SyslogFacility
94	log_facility_number(char *name)
95	{
96	int i;
97	if (name != NULL)
98	for (i = 0; log_facilities[i].name; i++)
99	if (strcasecmp(log_facilities[i].name, name) == 0)
100	return log_facilities[i].val;
101	return (SyslogFacility) - 1;
102	}
103
104	LogLevel
105	log_level_number(char *name)
106	{
107	int i;
108	if (name != NULL)
109	for (i = 0; log_levels[i].name; i++)
110	if (strcasecmp(log_levels[i].name, name) == 0)
111	return log_levels[i].val;
112	return (LogLevel) - 1;
113	}
114	/* Fatal messages. This function never returns. */
115
116	void
117	fatal(const char *fmt,...)
118	{
119	va_list args;
120	va_start(args, fmt);
121	do_log(SYSLOG_LEVEL_FATAL, fmt, args);
122	va_end(args);
123	fatal_cleanup();
124	}
125
126	/* Error messages that should be logged. */
127
128	void
129	error(const char *fmt,...)
130	{
131	va_list args;
132	va_start(args, fmt);
133	do_log(SYSLOG_LEVEL_ERROR, fmt, args);
134	va_end(args);
135	}
136
137	/* Log this message (information that usually should go to the log). */
138
139	void
140	log(const char *fmt,...)
141	{
142	va_list args;
143	va_start(args, fmt);
144	do_log(SYSLOG_LEVEL_INFO, fmt, args);
145	va_end(args);
146	}
147
148	/* More detailed messages (information that does not need to go to the log). */
149
150	void
151	verbose(const char *fmt,...)
152	{
153	va_list args;
154	va_start(args, fmt);
155	do_log(SYSLOG_LEVEL_VERBOSE, fmt, args);
156	va_end(args);
157	}
158
159	/* Debugging messages that should not be logged during normal operation. */
160
161	void
162	debug(const char *fmt,...)
163	{
164	va_list args;
165	va_start(args, fmt);
166	do_log(SYSLOG_LEVEL_DEBUG1, fmt, args);
167	va_end(args);
168	}
169
170	void
171	debug2(const char *fmt,...)
172	{
173	va_list args;
174	va_start(args, fmt);
175	do_log(SYSLOG_LEVEL_DEBUG2, fmt, args);
176	va_end(args);
177	}
178
179	void
180	debug3(const char *fmt,...)
181	{
182	va_list args;
183	va_start(args, fmt);
184	do_log(SYSLOG_LEVEL_DEBUG3, fmt, args);
185	va_end(args);
186	}
187
188	/* Fatal cleanup */
189
190	struct fatal_cleanup {
191	struct fatal_cleanup *next;
192	void (proc) (void );
193	void *context;
194	};
195
196	static struct fatal_cleanup *fatal_cleanups = NULL;
197
198	/* Registers a cleanup function to be called by fatal() before exiting. */
199
200	void
201	fatal_add_cleanup(void (proc) (void ), void *context)
202	{
203	struct fatal_cleanup *cu;
204
205	cu = xmalloc(sizeof(*cu));
206	cu->proc = proc;
207	cu->context = context;
208	cu->next = fatal_cleanups;
209	fatal_cleanups = cu;
210	}
211
212	/* Removes a cleanup frunction to be called at fatal(). */
213
214	void
215	fatal_remove_cleanup(void (proc) (void context), void *context)
216	{
217	struct fatal_cleanup *cup, cu;
218
219	for (cup = &fatal_cleanups; *cup; cup = &cu->next) {
220	cu = *cup;
221	if (cu->proc == proc && cu->context == context) {
222	*cup = cu->next;
223	xfree(cu);
224	return;
225	}
226	}
227	fatal("fatal_remove_cleanup: no such cleanup function: 0x%lx 0x%lx",
228	(u_long) proc, (u_long) context);
229	}
230
231	/* Cleanup and exit */
232	void
233	fatal_cleanup(void)
234	{
235	struct fatal_cleanup cu, next_cu;
236	static int called = 0;
237
238	if (called)
239	exit(255);
240	called = 1;
241	/* Call cleanup functions. */
242	for (cu = fatal_cleanups; cu; cu = next_cu) {
243	next_cu = cu->next;
244	debug("Calling cleanup 0x%lx(0x%lx)",
245	(u_long) cu->proc, (u_long) cu->context);
246	(*cu->proc) (cu->context);
247	}
248	exit(255);
249	}
250
251
252	/*
253	* Initialize the log.
254	*/
255
256	void
257	log_init(char *av0, LogLevel level, SyslogFacility facility, int on_stderr)
258	{
259	argv0 = av0;
260
261	switch (level) {
262	case SYSLOG_LEVEL_QUIET:
263	case SYSLOG_LEVEL_FATAL:
264	case SYSLOG_LEVEL_ERROR:
265	case SYSLOG_LEVEL_INFO:
266	case SYSLOG_LEVEL_VERBOSE:
267	case SYSLOG_LEVEL_DEBUG1:
268	case SYSLOG_LEVEL_DEBUG2:
269	case SYSLOG_LEVEL_DEBUG3:
270	log_level = level;
271	break;
272	default:
273	fprintf(stderr, "Unrecognized internal syslog level code %d\n",
274	(int) level);
275	exit(1);
276	}
277
278	log_on_stderr = on_stderr;
279	if (on_stderr)
280	return;
281
282	switch (facility) {
283	case SYSLOG_FACILITY_DAEMON:
284	log_facility = LOG_DAEMON;
285	break;
286	case SYSLOG_FACILITY_USER:
287	log_facility = LOG_USER;
288	break;
289	case SYSLOG_FACILITY_AUTH:
290	log_facility = LOG_AUTH;
291	break;
292	#ifdef LOG_AUTHPRIV
293	case SYSLOG_FACILITY_AUTHPRIV:
294	log_facility = LOG_AUTHPRIV;
295	break;
296	#endif
297	case SYSLOG_FACILITY_LOCAL0:
298	log_facility = LOG_LOCAL0;
299	break;
300	case SYSLOG_FACILITY_LOCAL1:
301	log_facility = LOG_LOCAL1;
302	break;
303	case SYSLOG_FACILITY_LOCAL2:
304	log_facility = LOG_LOCAL2;
305	break;
306	case SYSLOG_FACILITY_LOCAL3:
307	log_facility = LOG_LOCAL3;
308	break;
309	case SYSLOG_FACILITY_LOCAL4:
310	log_facility = LOG_LOCAL4;
311	break;
312	case SYSLOG_FACILITY_LOCAL5:
313	log_facility = LOG_LOCAL5;
314	break;
315	case SYSLOG_FACILITY_LOCAL6:
316	log_facility = LOG_LOCAL6;
317	break;
318	case SYSLOG_FACILITY_LOCAL7:
319	log_facility = LOG_LOCAL7;
320	break;
321	default:
322	fprintf(stderr,
323	"Unrecognized internal syslog facility code %d\n",
324	(int) facility);
325	exit(1);
326	}
327	}
328
329	#define MSGBUFSIZ 1024
330
331	static void
332	do_log(LogLevel level, const char *fmt, va_list args)
333	{
334	char msgbuf[MSGBUFSIZ];
335	char fmtbuf[MSGBUFSIZ];
336	char *txt = NULL;
337	int pri = LOG_INFO;
338
339	if (level > log_level)
340	return;
341
342	switch (level) {
343	case SYSLOG_LEVEL_FATAL:
344	if (!log_on_stderr)
345	txt = "fatal";
346	pri = LOG_CRIT;
347	break;
348	case SYSLOG_LEVEL_ERROR:
349	if (!log_on_stderr)
350	txt = "error";
351	pri = LOG_ERR;
352	break;
353	case SYSLOG_LEVEL_INFO:
354	pri = LOG_INFO;
355	break;
356	case SYSLOG_LEVEL_VERBOSE:
357	pri = LOG_INFO;
358	break;
359	case SYSLOG_LEVEL_DEBUG1:
360	txt = "debug1";
361	pri = LOG_DEBUG;
362	break;
363	case SYSLOG_LEVEL_DEBUG2:
364	txt = "debug2";
365	pri = LOG_DEBUG;
366	break;
367	case SYSLOG_LEVEL_DEBUG3:
368	txt = "debug3";
369	pri = LOG_DEBUG;
370	break;
371	default:
372	txt = "internal error";
373	pri = LOG_ERR;
374	break;
375	}
376	if (txt != NULL) {
377	snprintf(fmtbuf, sizeof(fmtbuf), "%s: %s", txt, fmt);
378	vsnprintf(msgbuf, sizeof(msgbuf), fmtbuf, args);
379	} else {
380	vsnprintf(msgbuf, sizeof(msgbuf), fmt, args);
381	}
382	if (log_on_stderr) {
383	fprintf(stderr, "%s\r\n", msgbuf);
384	} else {
385	openlog(argv0 ? argv0 : __progname, LOG_PID, log_facility);
386	syslog(pri, "%.500s", msgbuf);
387	closelog();
388	}
389	}