250 lines
10 KiB
C
250 lines
10 KiB
C
/****************************************************************************
|
|
* include/syslog.h
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifndef __INCLUDE_SYSLOG_H
|
|
#define __INCLUDE_SYSLOG_H
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
#include <nuttx/compiler.h>
|
|
|
|
#include <stdint.h>
|
|
#include <stdarg.h>
|
|
#include <stdbool.h>
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
/* The option argument to openlog() is an OR of any of these:
|
|
*
|
|
* LOG_CONS - Write directly to system console if there is an error
|
|
* while sending to system logger.
|
|
* LOG_NDELAY - Open the connection immediately (normally, the connection
|
|
* is opened when the first message is logged).
|
|
* LOG_NOWAIT - Don't wait for child processes that may have been created
|
|
* while logging the message.
|
|
* LOG_ODELAY - The converse of LOG_NDELAY; opening of the connection is
|
|
* delayed until syslog() is called. (This is the default,
|
|
* and need not be specified.)
|
|
* LOG_PERROR - (Not in POSIX.1-2001 or POSIX.1-2008.) Print to stderr
|
|
* as well (Linux).
|
|
* LOG_PID - Include PID with each message.
|
|
*/
|
|
|
|
#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 */
|
|
|
|
/* Note: openlog() is not currently supported */
|
|
|
|
/* The facility argument is used to specify what type of program is logging
|
|
* the message. This lets the configuration file specify that messages from
|
|
* different facilities will be handled differently.
|
|
*
|
|
* LOG_AUTH - Security/authorization messages
|
|
* LOG_AUTHPRIV - Security/authorization messages (private)
|
|
* LOG_CRON - Clock daemon (cron and at)
|
|
* LOG_DAEMON - System daemons without separate facility value
|
|
* LOG_FTP - FTP daemon
|
|
* LOG_KERN - Kernel messages (these can't be generated from user
|
|
* processes)
|
|
* LOG_LOCAL0 through LOG_LOCAL7 - Reserved for local use
|
|
* LOG_LPR - Line printer subsystem
|
|
* LOG_MAIL - Mail subsystem
|
|
* LOG_NEWS - USENET news subsystem
|
|
* LOG_SYSLOG - Messages generated internally by syslogd(8)
|
|
* LOG_USER - Generic user-level messages (default)
|
|
* LOG_UUCP - UUCP subsystem
|
|
*/
|
|
|
|
#define LOG_AUTH 0
|
|
#define LOG_AUTHPRIV 0
|
|
#define LOG_CRON 0
|
|
#define LOG_DAEMON 0
|
|
#define LOG_FTP 0
|
|
#define LOG_KERN 0
|
|
#define LOG_LOCAL0 0
|
|
#define LOG_LOCAL1 0
|
|
#define LOG_LOCAL2 0
|
|
#define LOG_LOCAL3 0
|
|
#define LOG_LOCAL4 0
|
|
#define LOG_LOCAL5 0
|
|
#define LOG_LOCAL6 0
|
|
#define LOG_LOCAL7 0
|
|
#define LOG_LPR 0
|
|
#define LOG_MAIL 0
|
|
#define LOG_NEWS 0
|
|
#define LOG_SYSLOG 0
|
|
#define LOG_USER 0
|
|
#define LOG_UUCP 0
|
|
|
|
/* This determines the importance of the message. The levels are, in order
|
|
* of decreasing importance:
|
|
*/
|
|
|
|
#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 message */
|
|
#define LOG_DEBUG 7 /* Debug-level message */
|
|
|
|
/* Used with setlogmask() */
|
|
|
|
#define LOG_MASK(p) (1 << (p))
|
|
#define LOG_UPTO(p) ((1 << ((p)+1)) - 1)
|
|
#define LOG_ALL 0xff
|
|
|
|
/****************************************************************************
|
|
* Public Function Prototypes
|
|
****************************************************************************/
|
|
|
|
#if defined(__cplusplus)
|
|
extern "C"
|
|
{
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: openlog
|
|
*
|
|
* Description:
|
|
* The openlog() function sets process attributes that affect subsequent
|
|
* calls to syslog(). The ident argument is a string that is prepended to
|
|
* every message. The logopt argument indicates logging options. Values
|
|
* for logopt are constructed by a bitwise-inclusive OR of zero or more of
|
|
* the following:
|
|
*
|
|
* LOG_PID - Log the process ID with each message. This is useful for
|
|
* identifying specific processes.
|
|
*
|
|
* LOG_CONS - Write messages to the system console if they cannot be
|
|
* sent to the logging facility. The syslog() function ensures that
|
|
* the process does not acquire the console as a controlling terminal
|
|
* in the process of writing the message.
|
|
*
|
|
* LOG_NDELAY - Open the connection to the logging facility immediately.
|
|
* Normally the open is delayed until the first message is logged.
|
|
* This is useful for programs that need to manage the order in which
|
|
* file descriptors are allocated.
|
|
*
|
|
* LOG_ODELAY - Delay open until syslog() is called.
|
|
*
|
|
* LOG_NOWAIT - Do not wait for child processes that may have been
|
|
* created during the course of logging the message. This option
|
|
* should be used by processes that enable notification of child
|
|
* termination using SIGCHLD, since syslog() may otherwise block
|
|
* waiting for a child whose exit status has already been collected.
|
|
*
|
|
* The facility argument encodes a default facility to be assigned to all
|
|
* messages that do not have an explicit facility already encoded. The
|
|
* initial default facility is LOG_USER.
|
|
*
|
|
* It is not necessary to call openlog() prior to calling syslog().
|
|
*
|
|
****************************************************************************/
|
|
|
|
/* Not supported */
|
|
#define openlog(i, o, f) {(void)(i); (void)(o); (void)(f);}
|
|
|
|
/****************************************************************************
|
|
* Name: closelog
|
|
*
|
|
* Description:
|
|
* The openlog() and syslog() functions may allocate a file descriptor.
|
|
* The closelog() function will close any open file descriptors allocated
|
|
* by previous calls to openlog() or syslog().
|
|
*
|
|
****************************************************************************/
|
|
|
|
/* Not supported */
|
|
#define closelog()
|
|
|
|
/****************************************************************************
|
|
* Name: syslog and vsyslog
|
|
*
|
|
* Description:
|
|
* syslog() generates a log message. The priority argument is formed by
|
|
* ORing the facility and the level values (see include/syslog.h). The
|
|
* remaining arguments are a format, as in printf and any arguments to the
|
|
* format.
|
|
*
|
|
* The NuttX implementation does not support any special formatting
|
|
* characters beyond those supported by printf.
|
|
*
|
|
* The function vsyslog() performs the same task as syslog() with the
|
|
* difference that it takes a set of arguments which have been obtained
|
|
* using the stdarg variable argument list macros.
|
|
*
|
|
****************************************************************************/
|
|
|
|
void syslog(int priority, FAR const IPTR char *fmt, ...) syslog_like(2, 3);
|
|
void vsyslog(int priority, FAR const IPTR char *fmt, va_list ap)
|
|
syslog_like(2, 0);
|
|
|
|
/****************************************************************************
|
|
* Name: setlogmask
|
|
*
|
|
* Description:
|
|
* The setlogmask() function sets the logmask and returns the previous
|
|
* mask. If the mask argument is 0, the current logmask is not modified.
|
|
*
|
|
* The SYSLOG priorities are: LOG_EMERG, LOG_ALERT, LOG_CRIT, LOG_ERR,
|
|
* LOG_WARNING, LOG_NOTICE, LOG_INFO, and LOG_DEBUG. The bit corresponding
|
|
* to a priority p is LOG_MASK(p); LOG_UPTO(p) provides the mask of all
|
|
* priorities in the above list up to and including p.
|
|
*
|
|
* Per OpenGroup.org "If the maskpri argument is 0, the current log mask
|
|
* is not modified." In this implementation, the value zero is permitted
|
|
* in order to disable all syslog levels.
|
|
*
|
|
* NOTE: setlogmask is not a thread-safe, re-entrant function. Concurrent
|
|
* use of setlogmask() will have undefined behavior.
|
|
*
|
|
* REVISIT: Per POSIX the syslog mask should be a per-process value but in
|
|
* NuttX, the scope of the mask is dependent on the nature of the build:
|
|
*
|
|
* Flat Build: There is one, global SYSLOG mask that controls all output.
|
|
* Protected Build: There are two SYSLOG masks. One within the kernel
|
|
* that controls only kernel output. And one in user-space that controls
|
|
* only user SYSLOG output.
|
|
* Kernel Build: The kernel build is compliant with the POSIX requirement:
|
|
* There will be one mask for for each user process, controlling the
|
|
* SYSLOG output only form that process. There will be a separate mask
|
|
* accessible only in the kernel code to control kernel SYSLOG output.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int setlogmask(int mask);
|
|
|
|
#if defined(__cplusplus)
|
|
}
|
|
#endif
|
|
|
|
#endif /* __INCLUDE_SYSLOG_H */
|