xref: /freebsd/crypto/openssh/log.c (revision ae1f160d56b2d59d406f1af34cbdcc88a9e1b914)
1511b41d2SMark Murray /*
2b66f2d16SKris Kennaway  * Author: Tatu Ylonen <ylo@cs.hut.fi>
3b66f2d16SKris Kennaway  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
4b66f2d16SKris Kennaway  *                    All rights reserved
5b66f2d16SKris Kennaway  *
6b66f2d16SKris Kennaway  * As far as I am concerned, the code I have written for this software
7b66f2d16SKris Kennaway  * can be used freely for any purpose.  Any derived versions of this
8b66f2d16SKris Kennaway  * software must be clearly marked as such, and if the derived work is
9b66f2d16SKris Kennaway  * incompatible with the protocol description in the RFC file, it must be
10b66f2d16SKris Kennaway  * called by a name other than "ssh" or "Secure Shell".
11b66f2d16SKris Kennaway  */
12b66f2d16SKris Kennaway /*
13b66f2d16SKris Kennaway  * Copyright (c) 2000 Markus Friedl.  All rights reserved.
14b66f2d16SKris Kennaway  *
15b66f2d16SKris Kennaway  * Redistribution and use in source and binary forms, with or without
16b66f2d16SKris Kennaway  * modification, are permitted provided that the following conditions
17b66f2d16SKris Kennaway  * are met:
18b66f2d16SKris Kennaway  * 1. Redistributions of source code must retain the above copyright
19b66f2d16SKris Kennaway  *    notice, this list of conditions and the following disclaimer.
20b66f2d16SKris Kennaway  * 2. Redistributions in binary form must reproduce the above copyright
21b66f2d16SKris Kennaway  *    notice, this list of conditions and the following disclaimer in the
22b66f2d16SKris Kennaway  *    documentation and/or other materials provided with the distribution.
23b66f2d16SKris Kennaway  *
24b66f2d16SKris Kennaway  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
25b66f2d16SKris Kennaway  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
26b66f2d16SKris Kennaway  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
27b66f2d16SKris Kennaway  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
28b66f2d16SKris Kennaway  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
29b66f2d16SKris Kennaway  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
30b66f2d16SKris Kennaway  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
31b66f2d16SKris Kennaway  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
32b66f2d16SKris Kennaway  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
33b66f2d16SKris Kennaway  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34511b41d2SMark Murray  */
35511b41d2SMark Murray 
36511b41d2SMark Murray #include "includes.h"
37ae1f160dSDag-Erling Smørgrav RCSID("$OpenBSD: log.c,v 1.22 2002/02/22 12:20:34 markus Exp $");
38511b41d2SMark Murray 
391e8db6e2SBrian Feldman #include "log.h"
40511b41d2SMark Murray #include "xmalloc.h"
41511b41d2SMark Murray 
421e8db6e2SBrian Feldman #include <syslog.h>
431e8db6e2SBrian Feldman 
441e8db6e2SBrian Feldman static LogLevel log_level = SYSLOG_LEVEL_INFO;
451e8db6e2SBrian Feldman static int log_on_stderr = 1;
461e8db6e2SBrian Feldman static int log_facility = LOG_AUTH;
471e8db6e2SBrian Feldman static char *argv0;
481e8db6e2SBrian Feldman 
491e8db6e2SBrian Feldman extern char *__progname;
501e8db6e2SBrian Feldman 
511e8db6e2SBrian Feldman /* textual representation of log-facilities/levels */
521e8db6e2SBrian Feldman 
531e8db6e2SBrian Feldman static struct {
541e8db6e2SBrian Feldman 	const char *name;
551e8db6e2SBrian Feldman 	SyslogFacility val;
561e8db6e2SBrian Feldman } log_facilities[] = {
571e8db6e2SBrian Feldman 	{ "DAEMON",	SYSLOG_FACILITY_DAEMON },
581e8db6e2SBrian Feldman 	{ "USER",	SYSLOG_FACILITY_USER },
591e8db6e2SBrian Feldman 	{ "AUTH",	SYSLOG_FACILITY_AUTH },
601e8db6e2SBrian Feldman 	{ "LOCAL0",	SYSLOG_FACILITY_LOCAL0 },
611e8db6e2SBrian Feldman 	{ "LOCAL1",	SYSLOG_FACILITY_LOCAL1 },
621e8db6e2SBrian Feldman 	{ "LOCAL2",	SYSLOG_FACILITY_LOCAL2 },
631e8db6e2SBrian Feldman 	{ "LOCAL3",	SYSLOG_FACILITY_LOCAL3 },
641e8db6e2SBrian Feldman 	{ "LOCAL4",	SYSLOG_FACILITY_LOCAL4 },
651e8db6e2SBrian Feldman 	{ "LOCAL5",	SYSLOG_FACILITY_LOCAL5 },
661e8db6e2SBrian Feldman 	{ "LOCAL6",	SYSLOG_FACILITY_LOCAL6 },
671e8db6e2SBrian Feldman 	{ "LOCAL7",	SYSLOG_FACILITY_LOCAL7 },
68ae1f160dSDag-Erling Smørgrav 	{ NULL,		SYSLOG_FACILITY_NOT_SET }
691e8db6e2SBrian Feldman };
701e8db6e2SBrian Feldman 
711e8db6e2SBrian Feldman static struct {
721e8db6e2SBrian Feldman 	const char *name;
731e8db6e2SBrian Feldman 	LogLevel val;
741e8db6e2SBrian Feldman } log_levels[] =
751e8db6e2SBrian Feldman {
761e8db6e2SBrian Feldman 	{ "QUIET",	SYSLOG_LEVEL_QUIET },
771e8db6e2SBrian Feldman 	{ "FATAL",	SYSLOG_LEVEL_FATAL },
781e8db6e2SBrian Feldman 	{ "ERROR",	SYSLOG_LEVEL_ERROR },
791e8db6e2SBrian Feldman 	{ "INFO",	SYSLOG_LEVEL_INFO },
801e8db6e2SBrian Feldman 	{ "VERBOSE",	SYSLOG_LEVEL_VERBOSE },
811e8db6e2SBrian Feldman 	{ "DEBUG",	SYSLOG_LEVEL_DEBUG1 },
821e8db6e2SBrian Feldman 	{ "DEBUG1",	SYSLOG_LEVEL_DEBUG1 },
831e8db6e2SBrian Feldman 	{ "DEBUG2",	SYSLOG_LEVEL_DEBUG2 },
841e8db6e2SBrian Feldman 	{ "DEBUG3",	SYSLOG_LEVEL_DEBUG3 },
85ae1f160dSDag-Erling Smørgrav 	{ NULL,		SYSLOG_LEVEL_NOT_SET }
861e8db6e2SBrian Feldman };
871e8db6e2SBrian Feldman 
881e8db6e2SBrian Feldman SyslogFacility
891e8db6e2SBrian Feldman log_facility_number(char *name)
901e8db6e2SBrian Feldman {
911e8db6e2SBrian Feldman 	int i;
921e8db6e2SBrian Feldman 	if (name != NULL)
931e8db6e2SBrian Feldman 		for (i = 0; log_facilities[i].name; i++)
941e8db6e2SBrian Feldman 			if (strcasecmp(log_facilities[i].name, name) == 0)
951e8db6e2SBrian Feldman 				return log_facilities[i].val;
96ae1f160dSDag-Erling Smørgrav 	return SYSLOG_FACILITY_NOT_SET;
971e8db6e2SBrian Feldman }
981e8db6e2SBrian Feldman 
991e8db6e2SBrian Feldman LogLevel
1001e8db6e2SBrian Feldman log_level_number(char *name)
1011e8db6e2SBrian Feldman {
1021e8db6e2SBrian Feldman 	int i;
1031e8db6e2SBrian Feldman 	if (name != NULL)
1041e8db6e2SBrian Feldman 		for (i = 0; log_levels[i].name; i++)
1051e8db6e2SBrian Feldman 			if (strcasecmp(log_levels[i].name, name) == 0)
1061e8db6e2SBrian Feldman 				return log_levels[i].val;
107ae1f160dSDag-Erling Smørgrav 	return SYSLOG_LEVEL_NOT_SET;
108511b41d2SMark Murray }
109511b41d2SMark Murray 
110511b41d2SMark Murray /* Error messages that should be logged. */
111511b41d2SMark Murray 
112511b41d2SMark Murray void
113511b41d2SMark Murray error(const char *fmt,...)
114511b41d2SMark Murray {
115511b41d2SMark Murray 	va_list args;
116511b41d2SMark Murray 	va_start(args, fmt);
117511b41d2SMark Murray 	do_log(SYSLOG_LEVEL_ERROR, fmt, args);
118511b41d2SMark Murray 	va_end(args);
119511b41d2SMark Murray }
120511b41d2SMark Murray 
121511b41d2SMark Murray /* Log this message (information that usually should go to the log). */
122511b41d2SMark Murray 
123511b41d2SMark Murray void
124511b41d2SMark Murray log(const char *fmt,...)
125511b41d2SMark Murray {
126511b41d2SMark Murray 	va_list args;
127511b41d2SMark Murray 	va_start(args, fmt);
128511b41d2SMark Murray 	do_log(SYSLOG_LEVEL_INFO, fmt, args);
129511b41d2SMark Murray 	va_end(args);
130511b41d2SMark Murray }
131511b41d2SMark Murray 
132511b41d2SMark Murray /* More detailed messages (information that does not need to go to the log). */
133511b41d2SMark Murray 
134511b41d2SMark Murray void
135511b41d2SMark Murray verbose(const char *fmt,...)
136511b41d2SMark Murray {
137511b41d2SMark Murray 	va_list args;
138511b41d2SMark Murray 	va_start(args, fmt);
139511b41d2SMark Murray 	do_log(SYSLOG_LEVEL_VERBOSE, fmt, args);
140511b41d2SMark Murray 	va_end(args);
141511b41d2SMark Murray }
142511b41d2SMark Murray 
143511b41d2SMark Murray /* Debugging messages that should not be logged during normal operation. */
144511b41d2SMark Murray 
145511b41d2SMark Murray void
146511b41d2SMark Murray debug(const char *fmt,...)
147511b41d2SMark Murray {
148511b41d2SMark Murray 	va_list args;
149511b41d2SMark Murray 	va_start(args, fmt);
1505b9b2fafSBrian Feldman 	do_log(SYSLOG_LEVEL_DEBUG1, fmt, args);
1515b9b2fafSBrian Feldman 	va_end(args);
1525b9b2fafSBrian Feldman }
1535b9b2fafSBrian Feldman 
1545b9b2fafSBrian Feldman void
1555b9b2fafSBrian Feldman debug2(const char *fmt,...)
1565b9b2fafSBrian Feldman {
1575b9b2fafSBrian Feldman 	va_list args;
1585b9b2fafSBrian Feldman 	va_start(args, fmt);
1595b9b2fafSBrian Feldman 	do_log(SYSLOG_LEVEL_DEBUG2, fmt, args);
1605b9b2fafSBrian Feldman 	va_end(args);
1615b9b2fafSBrian Feldman }
1625b9b2fafSBrian Feldman 
1635b9b2fafSBrian Feldman void
1645b9b2fafSBrian Feldman debug3(const char *fmt,...)
1655b9b2fafSBrian Feldman {
1665b9b2fafSBrian Feldman 	va_list args;
1675b9b2fafSBrian Feldman 	va_start(args, fmt);
1685b9b2fafSBrian Feldman 	do_log(SYSLOG_LEVEL_DEBUG3, fmt, args);
169511b41d2SMark Murray 	va_end(args);
170511b41d2SMark Murray }
171511b41d2SMark Murray 
172511b41d2SMark Murray /* Fatal cleanup */
173511b41d2SMark Murray 
174511b41d2SMark Murray struct fatal_cleanup {
175511b41d2SMark Murray 	struct fatal_cleanup *next;
176511b41d2SMark Murray 	void (*proc) (void *);
177511b41d2SMark Murray 	void *context;
178511b41d2SMark Murray };
179511b41d2SMark Murray 
180511b41d2SMark Murray static struct fatal_cleanup *fatal_cleanups = NULL;
181511b41d2SMark Murray 
182511b41d2SMark Murray /* Registers a cleanup function to be called by fatal() before exiting. */
183511b41d2SMark Murray 
184511b41d2SMark Murray void
185511b41d2SMark Murray fatal_add_cleanup(void (*proc) (void *), void *context)
186511b41d2SMark Murray {
187511b41d2SMark Murray 	struct fatal_cleanup *cu;
188511b41d2SMark Murray 
189511b41d2SMark Murray 	cu = xmalloc(sizeof(*cu));
190511b41d2SMark Murray 	cu->proc = proc;
191511b41d2SMark Murray 	cu->context = context;
192511b41d2SMark Murray 	cu->next = fatal_cleanups;
193511b41d2SMark Murray 	fatal_cleanups = cu;
194511b41d2SMark Murray }
195511b41d2SMark Murray 
196511b41d2SMark Murray /* Removes a cleanup frunction to be called at fatal(). */
197511b41d2SMark Murray 
198511b41d2SMark Murray void
199511b41d2SMark Murray fatal_remove_cleanup(void (*proc) (void *context), void *context)
200511b41d2SMark Murray {
201511b41d2SMark Murray 	struct fatal_cleanup **cup, *cu;
202511b41d2SMark Murray 
203511b41d2SMark Murray 	for (cup = &fatal_cleanups; *cup; cup = &cu->next) {
204511b41d2SMark Murray 		cu = *cup;
205511b41d2SMark Murray 		if (cu->proc == proc && cu->context == context) {
206511b41d2SMark Murray 			*cup = cu->next;
207511b41d2SMark Murray 			xfree(cu);
208511b41d2SMark Murray 			return;
209511b41d2SMark Murray 		}
210511b41d2SMark Murray 	}
2111e8db6e2SBrian Feldman 	fatal("fatal_remove_cleanup: no such cleanup function: 0x%lx 0x%lx",
2121e8db6e2SBrian Feldman 	    (u_long) proc, (u_long) context);
213511b41d2SMark Murray }
214511b41d2SMark Murray 
215511b41d2SMark Murray /* Cleanup and exit */
216511b41d2SMark Murray void
217511b41d2SMark Murray fatal_cleanup(void)
218511b41d2SMark Murray {
219511b41d2SMark Murray 	struct fatal_cleanup *cu, *next_cu;
220511b41d2SMark Murray 	static int called = 0;
221511b41d2SMark Murray 
222511b41d2SMark Murray 	if (called)
223511b41d2SMark Murray 		exit(255);
224511b41d2SMark Murray 	called = 1;
225511b41d2SMark Murray 	/* Call cleanup functions. */
226511b41d2SMark Murray 	for (cu = fatal_cleanups; cu; cu = next_cu) {
227511b41d2SMark Murray 		next_cu = cu->next;
228511b41d2SMark Murray 		debug("Calling cleanup 0x%lx(0x%lx)",
2291e8db6e2SBrian Feldman 		    (u_long) cu->proc, (u_long) cu->context);
230511b41d2SMark Murray 		(*cu->proc) (cu->context);
231511b41d2SMark Murray 	}
232511b41d2SMark Murray 	exit(255);
233511b41d2SMark Murray }
234511b41d2SMark Murray 
235511b41d2SMark Murray 
2361e8db6e2SBrian Feldman /*
2371e8db6e2SBrian Feldman  * Initialize the log.
2381e8db6e2SBrian Feldman  */
239511b41d2SMark Murray 
2401e8db6e2SBrian Feldman void
2411e8db6e2SBrian Feldman log_init(char *av0, LogLevel level, SyslogFacility facility, int on_stderr)
242511b41d2SMark Murray {
2431e8db6e2SBrian Feldman 	argv0 = av0;
244511b41d2SMark Murray 
2451e8db6e2SBrian Feldman 	switch (level) {
2461e8db6e2SBrian Feldman 	case SYSLOG_LEVEL_QUIET:
2471e8db6e2SBrian Feldman 	case SYSLOG_LEVEL_FATAL:
2481e8db6e2SBrian Feldman 	case SYSLOG_LEVEL_ERROR:
2491e8db6e2SBrian Feldman 	case SYSLOG_LEVEL_INFO:
2501e8db6e2SBrian Feldman 	case SYSLOG_LEVEL_VERBOSE:
2511e8db6e2SBrian Feldman 	case SYSLOG_LEVEL_DEBUG1:
2521e8db6e2SBrian Feldman 	case SYSLOG_LEVEL_DEBUG2:
2531e8db6e2SBrian Feldman 	case SYSLOG_LEVEL_DEBUG3:
2541e8db6e2SBrian Feldman 		log_level = level;
2551e8db6e2SBrian Feldman 		break;
2561e8db6e2SBrian Feldman 	default:
2571e8db6e2SBrian Feldman 		fprintf(stderr, "Unrecognized internal syslog level code %d\n",
2581e8db6e2SBrian Feldman 		    (int) level);
2591e8db6e2SBrian Feldman 		exit(1);
260511b41d2SMark Murray 	}
261511b41d2SMark Murray 
2621e8db6e2SBrian Feldman 	log_on_stderr = on_stderr;
2631e8db6e2SBrian Feldman 	if (on_stderr)
2641e8db6e2SBrian Feldman 		return;
2651e8db6e2SBrian Feldman 
2661e8db6e2SBrian Feldman 	switch (facility) {
2671e8db6e2SBrian Feldman 	case SYSLOG_FACILITY_DAEMON:
2681e8db6e2SBrian Feldman 		log_facility = LOG_DAEMON;
2691e8db6e2SBrian Feldman 		break;
2701e8db6e2SBrian Feldman 	case SYSLOG_FACILITY_USER:
2711e8db6e2SBrian Feldman 		log_facility = LOG_USER;
2721e8db6e2SBrian Feldman 		break;
2731e8db6e2SBrian Feldman 	case SYSLOG_FACILITY_AUTH:
2741e8db6e2SBrian Feldman 		log_facility = LOG_AUTH;
2751e8db6e2SBrian Feldman 		break;
2761e8db6e2SBrian Feldman 	case SYSLOG_FACILITY_LOCAL0:
2771e8db6e2SBrian Feldman 		log_facility = LOG_LOCAL0;
2781e8db6e2SBrian Feldman 		break;
2791e8db6e2SBrian Feldman 	case SYSLOG_FACILITY_LOCAL1:
2801e8db6e2SBrian Feldman 		log_facility = LOG_LOCAL1;
2811e8db6e2SBrian Feldman 		break;
2821e8db6e2SBrian Feldman 	case SYSLOG_FACILITY_LOCAL2:
2831e8db6e2SBrian Feldman 		log_facility = LOG_LOCAL2;
2841e8db6e2SBrian Feldman 		break;
2851e8db6e2SBrian Feldman 	case SYSLOG_FACILITY_LOCAL3:
2861e8db6e2SBrian Feldman 		log_facility = LOG_LOCAL3;
2871e8db6e2SBrian Feldman 		break;
2881e8db6e2SBrian Feldman 	case SYSLOG_FACILITY_LOCAL4:
2891e8db6e2SBrian Feldman 		log_facility = LOG_LOCAL4;
2901e8db6e2SBrian Feldman 		break;
2911e8db6e2SBrian Feldman 	case SYSLOG_FACILITY_LOCAL5:
2921e8db6e2SBrian Feldman 		log_facility = LOG_LOCAL5;
2931e8db6e2SBrian Feldman 		break;
2941e8db6e2SBrian Feldman 	case SYSLOG_FACILITY_LOCAL6:
2951e8db6e2SBrian Feldman 		log_facility = LOG_LOCAL6;
2961e8db6e2SBrian Feldman 		break;
2971e8db6e2SBrian Feldman 	case SYSLOG_FACILITY_LOCAL7:
2981e8db6e2SBrian Feldman 		log_facility = LOG_LOCAL7;
2991e8db6e2SBrian Feldman 		break;
3001e8db6e2SBrian Feldman 	default:
3011e8db6e2SBrian Feldman 		fprintf(stderr,
3021e8db6e2SBrian Feldman 		    "Unrecognized internal syslog facility code %d\n",
3031e8db6e2SBrian Feldman 		    (int) facility);
3041e8db6e2SBrian Feldman 		exit(1);
3051e8db6e2SBrian Feldman 	}
3061e8db6e2SBrian Feldman }
3071e8db6e2SBrian Feldman 
3081e8db6e2SBrian Feldman #define MSGBUFSIZ 1024
3091e8db6e2SBrian Feldman 
3101e8db6e2SBrian Feldman void
3111e8db6e2SBrian Feldman do_log(LogLevel level, const char *fmt, va_list args)
312511b41d2SMark Murray {
3131e8db6e2SBrian Feldman 	char msgbuf[MSGBUFSIZ];
3141e8db6e2SBrian Feldman 	char fmtbuf[MSGBUFSIZ];
3151e8db6e2SBrian Feldman 	char *txt = NULL;
3161e8db6e2SBrian Feldman 	int pri = LOG_INFO;
3171e8db6e2SBrian Feldman 
3181e8db6e2SBrian Feldman 	if (level > log_level)
3191e8db6e2SBrian Feldman 		return;
3201e8db6e2SBrian Feldman 
3211e8db6e2SBrian Feldman 	switch (level) {
3221e8db6e2SBrian Feldman 	case SYSLOG_LEVEL_FATAL:
3231e8db6e2SBrian Feldman 		if (!log_on_stderr)
3241e8db6e2SBrian Feldman 			txt = "fatal";
3251e8db6e2SBrian Feldman 		pri = LOG_CRIT;
3261e8db6e2SBrian Feldman 		break;
3271e8db6e2SBrian Feldman 	case SYSLOG_LEVEL_ERROR:
3281e8db6e2SBrian Feldman 		if (!log_on_stderr)
3291e8db6e2SBrian Feldman 			txt = "error";
3301e8db6e2SBrian Feldman 		pri = LOG_ERR;
3311e8db6e2SBrian Feldman 		break;
3321e8db6e2SBrian Feldman 	case SYSLOG_LEVEL_INFO:
3331e8db6e2SBrian Feldman 		pri = LOG_INFO;
3341e8db6e2SBrian Feldman 		break;
3351e8db6e2SBrian Feldman 	case SYSLOG_LEVEL_VERBOSE:
3361e8db6e2SBrian Feldman 		pri = LOG_INFO;
3371e8db6e2SBrian Feldman 		break;
3381e8db6e2SBrian Feldman 	case SYSLOG_LEVEL_DEBUG1:
3391e8db6e2SBrian Feldman 		txt = "debug1";
3401e8db6e2SBrian Feldman 		pri = LOG_DEBUG;
3411e8db6e2SBrian Feldman 		break;
3421e8db6e2SBrian Feldman 	case SYSLOG_LEVEL_DEBUG2:
3431e8db6e2SBrian Feldman 		txt = "debug2";
3441e8db6e2SBrian Feldman 		pri = LOG_DEBUG;
3451e8db6e2SBrian Feldman 		break;
3461e8db6e2SBrian Feldman 	case SYSLOG_LEVEL_DEBUG3:
3471e8db6e2SBrian Feldman 		txt = "debug3";
3481e8db6e2SBrian Feldman 		pri = LOG_DEBUG;
3491e8db6e2SBrian Feldman 		break;
3501e8db6e2SBrian Feldman 	default:
3511e8db6e2SBrian Feldman 		txt = "internal error";
3521e8db6e2SBrian Feldman 		pri = LOG_ERR;
3531e8db6e2SBrian Feldman 		break;
3541e8db6e2SBrian Feldman 	}
3551e8db6e2SBrian Feldman 	if (txt != NULL) {
3561e8db6e2SBrian Feldman 		snprintf(fmtbuf, sizeof(fmtbuf), "%s: %s", txt, fmt);
3571e8db6e2SBrian Feldman 		vsnprintf(msgbuf, sizeof(msgbuf), fmtbuf, args);
3581e8db6e2SBrian Feldman 	} else {
3591e8db6e2SBrian Feldman 		vsnprintf(msgbuf, sizeof(msgbuf), fmt, args);
3601e8db6e2SBrian Feldman 	}
3611e8db6e2SBrian Feldman 	if (log_on_stderr) {
3621e8db6e2SBrian Feldman 		fprintf(stderr, "%s\r\n", msgbuf);
3631e8db6e2SBrian Feldman 	} else {
3641e8db6e2SBrian Feldman 		openlog(argv0 ? argv0 : __progname, LOG_PID, log_facility);
3651e8db6e2SBrian Feldman 		syslog(pri, "%.500s", msgbuf);
3661e8db6e2SBrian Feldman 		closelog();
3671e8db6e2SBrian Feldman 	}
368511b41d2SMark Murray }
369