/*	$NetBSD: log.c,v 1.12 2013/03/08 20:58:35 christos Exp $	*/

/*
 * Copyright (c) 1992 Carnegie Mellon University
 * All Rights Reserved.
 *
 * Permission to use, copy, modify and distribute this software and its
 * documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 *
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 *
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie Mellon
 * the rights to redistribute these changes.
 */
/*
 * Logging support for SUP
 **********************************************************************
 * HISTORY
 * Revision 1.5  92/08/11  12:03:43  mrt
 * 	Brad's delinting and variable argument list usage
 * 	changes. Added copyright.
 *
 * Revision 1.3  89/08/15  15:30:37  bww
 * 	Updated to use v*printf() in place of _doprnt().
 * 	From "[89/04/19            mja]" at CMU.
 * 	[89/08/15            bww]
 *
 * 27-Dec-87  Glenn Marcy (gm0w) at Carnegie-Mellon University
 *	Added check to allow logopen() to be called multiple times.
 *
 * 20-May-87  Glenn Marcy (gm0w) at Carnegie-Mellon University
 *	Created.
 *
 **********************************************************************
 */

#include <stdio.h>
#include <sys/syslog.h>
#include "supcdefs.h"
#include "supextern.h"
#include "c.h"

static int opened = 0;

void
logopen(char *program)
{
	if (opened)
		return;
	openlog(program, LOG_PID, LOG_DAEMON);
	opened++;
}

static void
vfmtbuf(int f, char *buf, size_t bufsiz, const char *fmt, va_list ap)
{
	char hostname[MAXHOSTNAMELEN];
	char xbuf[STRINGLENGTH], ybuf[STRINGLENGTH];
	gethostname(hostname, sizeof(hostname));
	snprintf(ybuf, sizeof(ybuf), "SUP@%s%s ", hostname, f ? ":" : "");
	vsnprintf(xbuf, sizeof(xbuf), fmt, ap);
	snprintf(buf, bufsiz, "%s%s", ybuf, xbuf);
	return;
}


void
logquit(int retval, const char *fmt, ...)
{
	char buf[STRINGLENGTH];
	va_list ap;

	va_start(ap, fmt);
	vfmtbuf(1, buf, sizeof(buf), fmt, ap);
	va_end(ap);
	if (opened) {
		syslog(LOG_ERR, "%s", buf);
		closelog();
		exit(retval);
	}
	quit(retval, "SUP: %s\n", buf);
}

void
logerr(const char *fmt, ...)
{
	char buf[STRINGLENGTH];
	va_list ap;

	va_start(ap, fmt);
	vfmtbuf(1, buf, sizeof(buf), fmt, ap);
	va_end(ap);
	if (opened) {
		syslog(LOG_ERR, "%s", buf);
		return;
	}
	fprintf(stderr, "SUP: %s\n", buf);
	(void) fflush(stderr);
}

void
loginfo(const char *fmt, ...)
{
	char buf[STRINGLENGTH];
	va_list ap;

	va_start(ap, fmt);
	vfmtbuf(0, buf, sizeof(buf), fmt, ap);
	va_end(ap);
	if (opened) {
		syslog(LOG_INFO, "%s", buf);
		return;
	}
	printf("%s\n", buf);
	(void) fflush(stdout);
}
#ifdef LIBWRAP
#include <tcpd.h>
#ifndef LIBWRAP_ALLOW_FACILITY
#define LIBWRAP_ALLOW_FACILITY LOG_AUTH
#endif
#ifndef LIBWRAP_ALLOW_SEVERITY
#define LIBWRAP_ALLOW_SEVERITY LOG_INFO
#endif
#ifndef LIBWRAP_DENY_FACILITY
#define LIBWRAP_DENY_FACILITY LOG_AUTH
#endif
#ifndef LIBWRAP_DENY_SEVERITY
#define LIBWRAP_DENY_SEVERITY LOG_WARNING
#endif
int allow_severity = LIBWRAP_ALLOW_FACILITY | LIBWRAP_ALLOW_SEVERITY;
int deny_severity = LIBWRAP_DENY_FACILITY | LIBWRAP_DENY_SEVERITY;

void
logdeny(const char *fmt, ...)
{
	char buf[STRINGLENGTH];
	va_list ap;

	va_start(ap, fmt);
	vfmtbuf(1, buf, sizeof(buf), fmt, ap);
	va_end(ap);
	if (opened) {
		syslog(deny_severity, "%s", buf);
		return;
	}
	printf("%s\n", buf);
	(void) fflush(stdout);
}

void
logallow(const char *fmt, ...)
{
	char buf[STRINGLENGTH];
	va_list ap;

	va_start(ap, fmt);
	vfmtbuf(1, buf, sizeof(buf), fmt, ap);
	va_end(ap);
	if (opened) {
		syslog(allow_severity, "%s", buf);
		return;
	}
	printf("%s\n", buf);
	(void) fflush(stdout);
}
#endif				/* LIBWRAP */