245 lines
9.5 KiB
C
245 lines
9.5 KiB
C
/****************************************************************************
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* include/syslog.h
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*
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* Copyright (C) 2013-2014 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __INCLUDE_SYSLOG_H
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#define __INCLUDE_SYSLOG_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/compiler.h>
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#include <stdint.h>
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#include <stdarg.h>
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#include <stdbool.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* The option argument to openlog() is an OR of any of these:
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*
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* LOG_CONS - Write directly to system console if there is an error
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* while sending to system logger.
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* LOG_NDELAY - Open the connection immediately (normally, the connection
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* is opened when the first message is logged).
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* LOG_NOWAIT - Don't wait for child processes that may have been created
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* while logging the message.
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* LOG_ODELAY - The converse of LOG_NDELAY; opening of the connection is
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* delayed until syslog() is called. (This is the default,
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* and need not be specified.)
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* LOG_PERROR - (Not in POSIX.1-2001 or POSIX.1-2008.) Print to stderr
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* as well (Linux).
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* LOG_PID - Include PID with each message.
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*/
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/* Note: openlog() is not currently supported */
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/* The facility argument is used to specify what type of program is logging
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* the message. This lets the configuration file specify that messages from
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* different facilities will be handled differently.
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*
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* LOG_AUTH - Security/authorization messages
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* LOG_AUTHPRIV - Security/authorization messages (private)
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* LOG_CRON - Clock daemon (cron and at)
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* LOG_DAEMON - System daemons without separate facility value
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* LOG_FTP - Ftp daemon
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* LOG_KERN - Lernel messages (these can't be generated from user
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* processes)
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* LOG_LOCAL0 through LOG_LOCAL7 - Reserved for local use
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* LOG_LPR - Line printer subsystem
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* LOG_MAIL - Mail subsystem
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* LOG_NEWS - USENET news subsystem
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* LOG_SYSLOG - Messages generated internally by syslogd(8)
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* LOG_USER - Generic user-level messages (default)
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* LOG_UUCP - UUCP subsystem
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*/
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#define LOG_AUTH 0
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#define LOG_AUTHPRIV 0
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#define LOG_CRON 0
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#define LOG_DAEMON 0
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#define LOG_FTP 0
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#define LOG_KERN 0
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#define LOG_LOCAL0 0
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#define LOG_LOCAL1 0
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#define LOG_LOCAL2 0
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#define LOG_LOCAL3 0
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#define LOG_LOCAL4 0
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#define LOG_LOCAL5 0
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#define LOG_LOCAL6 0
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#define LOG_LOCAL7 0
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#define LOG_LPR 0
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#define LOG_MAIL 0
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#define LOG_NEWS 0
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#define LOG_SYSLOG 0
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#define LOG_USER 0
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#define LOG_UUCP 0
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/* This determines the importance of the message. The levels are, in order
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* of decreasing importance:
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*/
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#define LOG_EMERG 0 /* System is unusable */
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#define LOG_ALERT 1 /* Action must be taken immediately */
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#define LOG_CRIT 2 /* Critical conditions */
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#define LOG_ERR 3 /* Error conditions */
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#define LOG_WARNING 4 /* Warning conditions */
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#define LOG_NOTICE 5 /* Normal, but significant, condition */
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#define LOG_INFO 6 /* Informational message */
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#define LOG_DEBUG 7 /* Debug-level message */
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/* Used with setlogmask() */
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#define LOG_MASK(p) (1 << (p))
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#define LOG_UPTO(p) ((1 << (p)) - 1)
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#define LOG_ALL 0xff
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#if defined(__cplusplus)
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extern "C"
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{
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#endif
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#if 0 /* Not supported */
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void openlog(FAR const char *ident, int option, int facility);
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void closelog(void);
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#endif
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/****************************************************************************
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* Name: syslog and vsyslog
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*
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* Description:
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* syslog() generates a log message. The priority argument is formed by
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* ORing the facility and the level values (see include/syslog.h). The
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* remaining arguments are a format, as in printf and any arguments to the
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* format.
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*
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* The NuttX implementation does not support any special formatting
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* characters beyond those supported by printf.
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*
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* The function vsyslog() performs the same task as syslog() with the
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* difference that it takes a set of arguments which have been obtained
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* using the stdarg variable argument list macros.
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*
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****************************************************************************/
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int syslog(int priority, FAR const IPTR char *format, ...);
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int vsyslog(int priority, FAR const IPTR char *src, va_list ap);
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/****************************************************************************
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* Name: lowsyslog and lowvsyslog
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*
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* Description:
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* syslog() generates a log message. The priority argument is formed by
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* ORing the facility and the level values (see include/syslog.h). The
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* remaining arguments are a format, as in printf and any arguments to the
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* format.
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*
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* This is a non-standard, low-level system logging interface. The
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* difference between syslog() and lowsyslog() is that the syslog()
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* interface writes to the syslog device (usually fd=1, stdout) whereas
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* lowsyslog() uses a lower level interface that works even from interrupt
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* handlers.
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*
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* If the platform cannot support lowsyslog, then we will substitute the
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* standard syslogging functions. These will, however, probably cause
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* problems if called from interrupt handlers, depending upon the nature of
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* the underlying syslog device.
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*
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* The function lowvsyslog() performs the same task as lowsyslog() with
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* the difference that it takes a set of arguments which have been
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* obtained using the stdarg variable argument list macros.
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*
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****************************************************************************/
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#ifdef CONFIG_ARCH_LOWPUTC
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int lowsyslog(int priority, FAR const IPTR char *format, ...);
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int lowvsyslog(int priority, FAR const IPTR char *format, va_list ap);
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#else
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# ifdef CONFIG_CPP_HAVE_VARARGS
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# define lowsyslog(p,f,...) syslog(p,f,##__VA_ARGS__)
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# else
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# define lowsyslog (void)
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# endif
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# define lowvsyslog(p,f,a) vsyslog(p,f,a)
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#endif
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/****************************************************************************
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* Name: setlogmask
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*
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* Description:
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* The setlogmask() function sets the logmask and returns the previous
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* mask. If the mask argument is 0, the current logmask is not modified.
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*
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* The SYSLOG priorities are: LOG_EMERG, LOG_ALERT, LOG_CRIT, LOG_ERR,
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* LOG_WARNING, LOG_NOTICE, LOG_INFO, and LOG_DEBUG. The bit corresponding
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* to a priority p is LOG_MASK(p); LOG_UPTO(p) provides the mask of all
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* priorities in the above list up to and including p.
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*
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* Per OpenGroup.org "If the maskpri argument is 0, the current log mask
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* is not modified." In this implementation, the value zero is permitted
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* in order to disable all syslog levels.
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*
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* REVISIT: Per POSIX the syslog mask should be a per-process value but in
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* NuttX, the scope of the mask is dependent on the nature of the build:
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*
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* Flat Build: There is one, global SYSLOG mask that controls all output.
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* Protected Build: There are two SYSLOG masks. One within the kernel
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* that controls only kernel output. And one in user-space that controls
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* only user SYSLOG output.
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* Kernel Build: The kernel build is compliant with the POSIX requirement:
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* There will be one mask for for each user process, controlling the
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* SYSLOG output only form that process. There will be a separate mask
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* accessable only in the kernel code to control kernel SYSLOG output.
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*
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****************************************************************************/
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int setlogmask(int mask);
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __INCLUDE_SYSLOG_H */
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