[openssh.git] / log-server.c

/*
 * Author: Tatu Ylonen <ylo@cs.hut.fi>
 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
 *                    All rights reserved
 * Server-side versions of debug(), log(), etc.  These normally send the output
 * to the system log.
 *
 * 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-server.c,v 1.17 2000/09/12 20:53:10 markus Exp $");

#include <syslog.h>
#include "packet.h"
#include "xmalloc.h"
#include "ssh.h"

static LogLevel log_level = SYSLOG_LEVEL_INFO;
static int log_on_stderr = 0;
static int log_facility = LOG_AUTH;

/* Initialize the log.
 *   av0	program name (should be argv[0])
 *   on_stderr	print also on stderr
 *   level	logging level
 */

void
log_init(char *av0, LogLevel level, SyslogFacility facility, int on_stderr)
{
	switch (level) {
	case SYSLOG_LEVEL_QUIET:
	case SYSLOG_LEVEL_ERROR:
	case SYSLOG_LEVEL_FATAL:
	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);
	}
	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;
	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);
	}
	log_on_stderr = on_stderr;
}

#define MSGBUFSIZ 1024

void
do_log(LogLevel level, const char *fmt, va_list args)
{
	char msgbuf[MSGBUFSIZ];
	char fmtbuf[MSGBUFSIZ];
	char *txt = NULL;
	int pri = LOG_INFO;
	extern char *__progname;

	if (level > log_level)
		return;
	switch (level) {
	case SYSLOG_LEVEL_ERROR:
		txt = "error";
		pri = LOG_ERR;
		break;
	case SYSLOG_LEVEL_FATAL:
		txt = "fatal";
		pri = LOG_ERR;
		break;
	case SYSLOG_LEVEL_INFO:
	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\n", msgbuf);
	} else {
		openlog(__progname, LOG_PID, log_facility);
		syslog(pri, "%.500s", msgbuf);
		closelog();
	}
}
Commit	Line	Data
8efc0c15	1	/*
5260325f	2	* Author: Tatu Ylonen <ylo@cs.hut.fi>
5260325f	3	* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5260325f	4	* All rights reserved
5260325f	5	* Server-side versions of debug(), log(), etc. These normally send the output
5260325f	6	* to the system log.
6ae2364d	7	*
bcbf86ec	8	* As far as I am concerned, the code I have written for this software
	9	* can be used freely for any purpose. Any derived versions of this
	10	* software must be clearly marked as such, and if the derived work is
	11	* incompatible with the protocol description in the RFC file, it must be
	12	* called by a name other than "ssh" or "Secure Shell".
	13	*
	14	*
	15	* Copyright (c) 2000 Markus Friedl. All rights reserved.
	16	*
	17	* Redistribution and use in source and binary forms, with or without
	18	* modification, are permitted provided that the following conditions
	19	* are met:
	20	* 1. Redistributions of source code must retain the above copyright
	21	* notice, this list of conditions and the following disclaimer.
	22	* 2. Redistributions in binary form must reproduce the above copyright
	23	* notice, this list of conditions and the following disclaimer in the
	24	* documentation and/or other materials provided with the distribution.
	25	*
	26	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	27	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	28	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	29	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	30	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	31	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	32	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	33	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	34	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	35	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
5260325f	36	*/
8efc0c15	37
8efc0c15	38	#include "includes.h"
bcbf86ec	39	RCSID("$OpenBSD: log-server.c,v 1.17 2000/09/12 20:53:10 markus Exp $");
8efc0c15	40
	41	#include <syslog.h>
	42	#include "packet.h"
	43	#include "xmalloc.h"
	44	#include "ssh.h"
	45
6a17f9c2	46	static LogLevel log_level = SYSLOG_LEVEL_INFO;
8efc0c15	47	static int log_on_stderr = 0;
e7c0f9d5	48	static int log_facility = LOG_AUTH;
8efc0c15	49
8efc0c15	50	/* Initialize the log.
5260325f	51	* av0 program name (should be argv[0])
	52	* on_stderr print also on stderr
	53	* level logging level
	54	*/
8efc0c15	55
6ae2364d	56	void
5260325f	57	log_init(char *av0, LogLevel level, SyslogFacility facility, int on_stderr)
8efc0c15	58	{
5260325f	59	switch (level) {
	60	case SYSLOG_LEVEL_QUIET:
	61	case SYSLOG_LEVEL_ERROR:
	62	case SYSLOG_LEVEL_FATAL:
	63	case SYSLOG_LEVEL_INFO:
	64	case SYSLOG_LEVEL_VERBOSE:
bcbf86ec	65	case SYSLOG_LEVEL_DEBUG1:
	66	case SYSLOG_LEVEL_DEBUG2:
	67	case SYSLOG_LEVEL_DEBUG3:
5260325f	68	log_level = level;
	69	break;
	70	default:
	71	fprintf(stderr, "Unrecognized internal syslog level code %d\n",
	72	(int) level);
	73	exit(1);
	74	}
	75	switch (facility) {
	76	case SYSLOG_FACILITY_DAEMON:
	77	log_facility = LOG_DAEMON;
	78	break;
	79	case SYSLOG_FACILITY_USER:
	80	log_facility = LOG_USER;
	81	break;
	82	case SYSLOG_FACILITY_AUTH:
	83	log_facility = LOG_AUTH;
	84	break;
	85	case SYSLOG_FACILITY_LOCAL0:
	86	log_facility = LOG_LOCAL0;
	87	break;
	88	case SYSLOG_FACILITY_LOCAL1:
	89	log_facility = LOG_LOCAL1;
	90	break;
	91	case SYSLOG_FACILITY_LOCAL2:
	92	log_facility = LOG_LOCAL2;
	93	break;
	94	case SYSLOG_FACILITY_LOCAL3:
	95	log_facility = LOG_LOCAL3;
	96	break;
	97	case SYSLOG_FACILITY_LOCAL4:
	98	log_facility = LOG_LOCAL4;
	99	break;
	100	case SYSLOG_FACILITY_LOCAL5:
	101	log_facility = LOG_LOCAL5;
	102	break;
	103	case SYSLOG_FACILITY_LOCAL6:
	104	log_facility = LOG_LOCAL6;
	105	break;
	106	case SYSLOG_FACILITY_LOCAL7:
	107	log_facility = LOG_LOCAL7;
	108	break;
	109	default:
	110	fprintf(stderr, "Unrecognized internal syslog facility code %d\n",
	111	(int) facility);
	112	exit(1);
	113	}
	114	log_on_stderr = on_stderr;
8efc0c15	115	}
8efc0c15	116
c8d54615	117	#define MSGBUFSIZ 1024
8efc0c15	118
6a17f9c2	119	void
6a17f9c2	120	do_log(LogLevel level, const char *fmt, va_list args)
8efc0c15	121	{
c8d54615	122	char msgbuf[MSGBUFSIZ];
c8d54615	123	char fmtbuf[MSGBUFSIZ];
5260325f	124	char *txt = NULL;
5260325f	125	int pri = LOG_INFO;
260d427b	126	extern char *__progname;
5260325f	127
	128	if (level > log_level)
	129	return;
	130	switch (level) {
	131	case SYSLOG_LEVEL_ERROR:
	132	txt = "error";
	133	pri = LOG_ERR;
	134	break;
	135	case SYSLOG_LEVEL_FATAL:
	136	txt = "fatal";
	137	pri = LOG_ERR;
	138	break;
	139	case SYSLOG_LEVEL_INFO:
	140	case SYSLOG_LEVEL_VERBOSE:
	141	pri = LOG_INFO;
	142	break;
bcbf86ec	143	case SYSLOG_LEVEL_DEBUG1:
	144	txt = "debug1";
	145	pri = LOG_DEBUG;
	146	break;
	147	case SYSLOG_LEVEL_DEBUG2:
	148	txt = "debug2";
	149	pri = LOG_DEBUG;
	150	break;
	151	case SYSLOG_LEVEL_DEBUG3:
	152	txt = "debug3";
5260325f	153	pri = LOG_DEBUG;
	154	break;
	155	default:
	156	txt = "internal error";
	157	pri = LOG_ERR;
	158	break;
	159	}
	160	if (txt != NULL) {
	161	snprintf(fmtbuf, sizeof(fmtbuf), "%s: %s", txt, fmt);
	162	vsnprintf(msgbuf, sizeof(msgbuf), fmtbuf, args);
	163	} else {
	164	vsnprintf(msgbuf, sizeof(msgbuf), fmt, args);
	165	}
7368a6c8	166	if (log_on_stderr) {
5260325f	167	fprintf(stderr, "%s\n", msgbuf);
7368a6c8	168	} else {
	169	openlog(__progname, LOG_PID, log_facility);
	170	syslog(pri, "%.500s", msgbuf);
	171	closelog();
	172	}
8efc0c15	173	}