[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"

#ifdef HAVE___PROGNAME
extern char *__progname;
#else /* HAVE___PROGNAME */
static const char *__progname = "sshd";
#endif /* HAVE___PROGNAME */

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;

	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
f601d847	46	#ifdef HAVE___PROGNAME
	47	extern char *__progname;
	48	#else /* HAVE___PROGNAME */
d3083fbd	49	static const char *__progname = "sshd";
f601d847	50	#endif /* HAVE___PROGNAME */
f601d847	51
6a17f9c2	52	static LogLevel log_level = SYSLOG_LEVEL_INFO;
8efc0c15	53	static int log_on_stderr = 0;
e7c0f9d5	54	static int log_facility = LOG_AUTH;
8efc0c15	55
8efc0c15	56	/* Initialize the log.
5260325f	57	* av0 program name (should be argv[0])
	58	* on_stderr print also on stderr
	59	* level logging level
	60	*/
8efc0c15	61
6ae2364d	62	void
5260325f	63	log_init(char *av0, LogLevel level, SyslogFacility facility, int on_stderr)
8efc0c15	64	{
5260325f	65	switch (level) {
	66	case SYSLOG_LEVEL_QUIET:
	67	case SYSLOG_LEVEL_ERROR:
	68	case SYSLOG_LEVEL_FATAL:
	69	case SYSLOG_LEVEL_INFO:
	70	case SYSLOG_LEVEL_VERBOSE:
bcbf86ec	71	case SYSLOG_LEVEL_DEBUG1:
	72	case SYSLOG_LEVEL_DEBUG2:
	73	case SYSLOG_LEVEL_DEBUG3:
5260325f	74	log_level = level;
	75	break;
	76	default:
	77	fprintf(stderr, "Unrecognized internal syslog level code %d\n",
	78	(int) level);
	79	exit(1);
	80	}
	81	switch (facility) {
	82	case SYSLOG_FACILITY_DAEMON:
	83	log_facility = LOG_DAEMON;
	84	break;
	85	case SYSLOG_FACILITY_USER:
	86	log_facility = LOG_USER;
	87	break;
	88	case SYSLOG_FACILITY_AUTH:
	89	log_facility = LOG_AUTH;
	90	break;
	91	case SYSLOG_FACILITY_LOCAL0:
	92	log_facility = LOG_LOCAL0;
	93	break;
	94	case SYSLOG_FACILITY_LOCAL1:
	95	log_facility = LOG_LOCAL1;
	96	break;
	97	case SYSLOG_FACILITY_LOCAL2:
	98	log_facility = LOG_LOCAL2;
	99	break;
	100	case SYSLOG_FACILITY_LOCAL3:
	101	log_facility = LOG_LOCAL3;
	102	break;
	103	case SYSLOG_FACILITY_LOCAL4:
	104	log_facility = LOG_LOCAL4;
	105	break;
	106	case SYSLOG_FACILITY_LOCAL5:
	107	log_facility = LOG_LOCAL5;
	108	break;
	109	case SYSLOG_FACILITY_LOCAL6:
	110	log_facility = LOG_LOCAL6;
	111	break;
	112	case SYSLOG_FACILITY_LOCAL7:
	113	log_facility = LOG_LOCAL7;
	114	break;
	115	default:
	116	fprintf(stderr, "Unrecognized internal syslog facility code %d\n",
	117	(int) facility);
	118	exit(1);
	119	}
	120	log_on_stderr = on_stderr;
8efc0c15	121	}
8efc0c15	122
c8d54615	123	#define MSGBUFSIZ 1024
8efc0c15	124
6a17f9c2	125	void
6a17f9c2	126	do_log(LogLevel level, const char *fmt, va_list args)
8efc0c15	127	{
c8d54615	128	char msgbuf[MSGBUFSIZ];
c8d54615	129	char fmtbuf[MSGBUFSIZ];
5260325f	130	char *txt = NULL;
	131	int pri = LOG_INFO;
	132
	133	if (level > log_level)
	134	return;
	135	switch (level) {
	136	case SYSLOG_LEVEL_ERROR:
	137	txt = "error";
	138	pri = LOG_ERR;
	139	break;
	140	case SYSLOG_LEVEL_FATAL:
	141	txt = "fatal";
	142	pri = LOG_ERR;
	143	break;
	144	case SYSLOG_LEVEL_INFO:
	145	case SYSLOG_LEVEL_VERBOSE:
	146	pri = LOG_INFO;
	147	break;
bcbf86ec	148	case SYSLOG_LEVEL_DEBUG1:
	149	txt = "debug1";
	150	pri = LOG_DEBUG;
	151	break;
	152	case SYSLOG_LEVEL_DEBUG2:
	153	txt = "debug2";
	154	pri = LOG_DEBUG;
	155	break;
	156	case SYSLOG_LEVEL_DEBUG3:
	157	txt = "debug3";
5260325f	158	pri = LOG_DEBUG;
	159	break;
	160	default:
	161	txt = "internal error";
	162	pri = LOG_ERR;
	163	break;
	164	}
	165	if (txt != NULL) {
	166	snprintf(fmtbuf, sizeof(fmtbuf), "%s: %s", txt, fmt);
	167	vsnprintf(msgbuf, sizeof(msgbuf), fmtbuf, args);
	168	} else {
	169	vsnprintf(msgbuf, sizeof(msgbuf), fmt, args);
	170	}
7368a6c8	171	if (log_on_stderr) {
5260325f	172	fprintf(stderr, "%s\n", msgbuf);
7368a6c8	173	} else {
	174	openlog(__progname, LOG_PID, log_facility);
	175	syslog(pri, "%.500s", msgbuf);
	176	closelog();
	177	}
8efc0c15	178	}