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[apple/xnu.git] / bsd / sys / syslog.h

/*
 * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*
 * Copyright (c) 1982, 1986, 1988, 1993
 *	The Regents of the University of California.  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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
 *
 *	@(#)syslog.h	8.1 (Berkeley) 6/2/93
 */

#ifndef	_SYS_SYSLOG_H_
#define _SYS_SYSLOG_H_

#include <sys/appleapiopts.h>

#define	_PATH_LOG	"/var/run/syslog"

/*
 * priorities/facilities are encoded into a single 32-bit quantity, where the
 * bottom 3 bits are the priority (0-7) and the top 28 bits are the facility
 * (0-big number).  Both the priorities and the facilities map roughly
 * one-to-one to strings in the syslogd(8) source code.  This mapping is
 * included in this file.
 *
 * priorities (these are ordered)
 */
#define	LOG_EMERG	0	/* system is unusable */
#define	LOG_ALERT	1	/* action must be taken immediately */
#define	LOG_CRIT	2	/* critical conditions */
#define	LOG_ERR		3	/* error conditions */
#define	LOG_WARNING	4	/* warning conditions */
#define	LOG_NOTICE	5	/* normal but significant condition */
#define	LOG_INFO	6	/* informational */
#define	LOG_DEBUG	7	/* debug-level messages */

#define	LOG_PRIMASK	0x07	/* mask to extract priority part (internal) */
				/* extract priority */
#define	LOG_PRI(p)	((p) & LOG_PRIMASK)
#define	LOG_MAKEPRI(fac, pri)	(((fac) << 3) | (pri))

#ifdef SYSLOG_NAMES
#define	INTERNAL_NOPRI	0x10	/* the "no priority" priority */
				/* mark "facility" */
#define	INTERNAL_MARK	LOG_MAKEPRI(LOG_NFACILITIES, 0)
typedef struct _code {
	char	*c_name;
	int	c_val;
} CODE;

CODE prioritynames[] = {
	"alert",	LOG_ALERT,
	"crit",		LOG_CRIT,
	"debug",	LOG_DEBUG,
	"emerg",	LOG_EMERG,
	"err",		LOG_ERR,
	"error",	LOG_ERR,		/* DEPRECATED */
	"info",		LOG_INFO,
	"none",		INTERNAL_NOPRI,		/* INTERNAL */
	"notice",	LOG_NOTICE,
	"panic", 	LOG_EMERG,		/* DEPRECATED */
	"warn",		LOG_WARNING,		/* DEPRECATED */
	"warning",	LOG_WARNING,
	NULL,		-1,
};
#endif

/* facility codes */
#define	LOG_KERN	(0<<3)	/* kernel messages */
#define	LOG_USER	(1<<3)	/* random user-level messages */
#define	LOG_MAIL	(2<<3)	/* mail system */
#define	LOG_DAEMON	(3<<3)	/* system daemons */
#define	LOG_AUTH	(4<<3)	/* security/authorization messages */
#define	LOG_SYSLOG	(5<<3)	/* messages generated internally by syslogd */
#define	LOG_LPR		(6<<3)	/* line printer subsystem */
#define	LOG_NEWS	(7<<3)	/* network news subsystem */
#define	LOG_UUCP	(8<<3)	/* UUCP subsystem */
#define	LOG_CRON	(9<<3)	/* clock daemon */
#define	LOG_AUTHPRIV	(10<<3)	/* security/authorization messages (private) */
#define	LOG_FTP		(11<<3)	/* ftp daemon */
#define	LOG_NETINFO	(12<<3)	/* NetInfo */
#define	LOG_REMOTEAUTH	(13<<3)	/* remote authentication/authorization */

	/* other codes through 15 reserved for system use */
#define	LOG_LOCAL0	(16<<3)	/* reserved for local use */
#define	LOG_LOCAL1	(17<<3)	/* reserved for local use */
#define	LOG_LOCAL2	(18<<3)	/* reserved for local use */
#define	LOG_LOCAL3	(19<<3)	/* reserved for local use */
#define	LOG_LOCAL4	(20<<3)	/* reserved for local use */
#define	LOG_LOCAL5	(21<<3)	/* reserved for local use */
#define	LOG_LOCAL6	(22<<3)	/* reserved for local use */
#define	LOG_LOCAL7	(23<<3)	/* reserved for local use */

#define	LOG_NFACILITIES	24	/* current number of facilities */
#define	LOG_FACMASK	0x03f8	/* mask to extract facility part */
				/* facility of pri */
#define	LOG_FAC(p)	(((p) & LOG_FACMASK) >> 3)

#ifdef SYSLOG_NAMES
CODE facilitynames[] = {
	"auth",		LOG_AUTH,
	"authpriv",	LOG_AUTHPRIV,
	"cron", 	LOG_CRON,
	"daemon",	LOG_DAEMON,
	"ftp",		LOG_FTP,
	"kern",		LOG_KERN,
	"lpr",		LOG_LPR,
	"mail",		LOG_MAIL,
	"mark", 	INTERNAL_MARK,		/* INTERNAL */
	"netinfo",	LOG_NETINFO,
	"remoteauth",	LOG_REMOTEAUTH,
	"news",		LOG_NEWS,
	"security",	LOG_AUTH,		/* DEPRECATED */
	"syslog",	LOG_SYSLOG,
	"user",		LOG_USER,
	"uucp",		LOG_UUCP,
	"local0",	LOG_LOCAL0,
	"local1",	LOG_LOCAL1,
	"local2",	LOG_LOCAL2,
	"local3",	LOG_LOCAL3,
	"local4",	LOG_LOCAL4,
	"local5",	LOG_LOCAL5,
	"local6",	LOG_LOCAL6,
	"local7",	LOG_LOCAL7,
	NULL,		-1,
};
#endif

#ifdef KERNEL
#ifdef __APPLE_API_PRIVATE
#define	LOG_PRINTF	-1	/* pseudo-priority to indicate use of printf */
#endif /* __APPLE_API_PRIVATE */
#endif

/*
 * arguments to setlogmask.
 */
#define	LOG_MASK(pri)	(1 << (pri))		/* mask for one priority */
#define	LOG_UPTO(pri)	((1 << ((pri)+1)) - 1)	/* all priorities through pri */

/*
 * Option flags for openlog.
 *
 * LOG_ODELAY no longer does anything.
 * LOG_NDELAY is the inverse of what it used to be.
 */
#define	LOG_PID		0x01	/* log the pid with each message */
#define	LOG_CONS	0x02	/* log on the console if errors in sending */
#define	LOG_ODELAY	0x04	/* delay open until first syslog() (default) */
#define	LOG_NDELAY	0x08	/* don't delay open */
#define	LOG_NOWAIT	0x10	/* don't wait for console forks: DEPRECATED */
#define	LOG_PERROR	0x20	/* log to stderr as well */

#include <sys/cdefs.h>

#ifndef KERNEL

/*
 * Don't use va_list in the vsyslog() prototype.   Va_list is typedef'd in two
 * places (<machine/varargs.h> and <machine/stdarg.h>), so if we include one
 * of them here we may collide with the utility's includes.  It's unreasonable
 * for utilities to have to include one of them to include syslog.h, so we get
 * _BSD_VA_LIST_ from <machine/ansi.h> and use it.
 */
#include <machine/ansi.h>

__BEGIN_DECLS
void	closelog __P((void));
void	openlog __P((const char *, int, int));
int	setlogmask __P((int));
void	syslog __P((int, const char *, ...));
void	vsyslog __P((int, const char *, _BSD_VA_LIST_));
__END_DECLS

#else /* !KERNEL */
#ifdef __APPLE_API_OBSOLETE
/*
 * bit field descriptions for printf %r and %R formats
 */

/*
 * printf("%r %R", val, reg_descp);
 * struct reg_desc *reg_descp;
 *
 * the %r and %R formats allow formatted output of bit fields.
 * reg_descp points to an array of reg_desc structures, each element of the
 * array describes a range of bits within val.  the array should have a
 * final element with all structure elements 0.
 * %r outputs a string of the format "<bit field descriptions>"
 * %R outputs a string of the format "0x%x<bit field descriptions>"
 *
 * The fields in a reg_desc are:
 *	unsigned rd_mask;	An appropriate mask to isolate the bit field
 *				within a word, and'ed with val
 *
 *	int rd_shift;		A shift amount to be done to the isolated
 *				bit field.  done before printing the isolate
 *				bit field with rd_format and before searching
 *				for symbolic value names in rd_values
 *
 *	char *rd_name;		If non-null, a bit field name to label any
 *				out from rd_format or searching rd_values.
 *				if neither rd_format or rd_values is non-null
 *				rd_name is printed only if the isolated
 *				bit field is non-null.
 *
 *	char *rd_format;	If non-null, the shifted bit field value
 *				is printed using this format.
 *
 *	struct reg_values *rd_values;	If non-null, a pointer to a table
 *				matching numeric values with symbolic names.
 *				rd_values are searched and the symbolic
 *				value is printed if a match is found, if no
 *				match is found "???" is printed.
 *
 * printf("%n %N", val, reg_valuesp);
 * struct reg_values *reg_valuesp;
 *
 * the %n and %N formats allow formatted output of symbolic constants
 * Reg_valuesp is a pointer to an array of struct reg_values which pairs
 * numeric values (rv_value) with symbolic names (rv_name).  The array is
 * terminated with a reg_values entry that has a null pointer for the
 * rv_name field.  When %n or %N is used rd_values are searched and the
 * symbolic value is printed if a match is found, if no match is found
 * "???" is printed.
 *				
 * printf("%C", val);
 * int val;
 *
 * the %C format prints an int as a 4 character string.
 * The most significant byte of the int is printed first, the least
 * significant byte is printed last.
 */

/*
 * register values
 * map between numeric values and symbolic values
 */
struct reg_values {
	unsigned rv_value;
	char *rv_name;
};

/*
 * register descriptors are used for formatted prints of register values
 * rd_mask and rd_shift must be defined, other entries may be null
 */
struct reg_desc {
	unsigned rd_mask;	/* mask to extract field */
	int rd_shift;		/* shift for extracted value, - >>, + << */
	char *rd_name;		/* field name */
	char *rd_format;	/* format to print field */
	struct reg_values *rd_values;	/* symbolic names of values */
};

#endif /* __APPLE_API_OBSOLETE */

void	logpri __P((int));
void	log __P((int, const char *, ...));
void	addlog __P((const char *, ...));

#endif /* !KERNEL */
#endif /* !_SYS_SYSLOG_H_ */