syslog.h(0p) — Linux manual page

PROLOG | NAME | SYNOPSIS | DESCRIPTION | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT

syslog.h(0P)            POSIX Programmer's Manual           syslog.h(0P)

PROLOG         top

       This manual page is part of the POSIX Programmer's Manual.  The
       Linux implementation of this interface may differ (consult the
       corresponding Linux manual page for details of Linux behavior),
       or the interface may not be implemented on Linux.

NAME         top

       syslog.h — definitions for system error logging

SYNOPSIS         top

       #include <syslog.h>

DESCRIPTION         top

       The <syslog.h> header shall define the following symbolic
       constants, zero or more of which may be OR'ed together to form
       the logopt option of openlog():

       LOG_PID       Log the process ID with each message.

       LOG_CONS      Log to the system console on error.

       LOG_NDELAY    Connect to syslog daemon immediately.

       LOG_ODELAY    Delay open until syslog() is called.

       LOG_NOWAIT    Do not wait for child processes.

       The <syslog.h> header shall define the following symbolic
       constants for use as the facility argument to openlog():

       LOG_KERN      Reserved for message generated by the system.

       LOG_USER      Message generated by a process.

       LOG_MAIL      Reserved for message generated by mail system.

       LOG_NEWS      Reserved for message generated by news system.

       LOG_UUCP      Reserved for message generated by UUCP system.

       LOG_DAEMON    Reserved for message generated by system daemon.

       LOG_AUTH      Reserved for message generated by authorization
                     daemon.

       LOG_CRON      Reserved for message generated by clock daemon.

       LOG_LPR       Reserved for message generated by printer system.

       LOG_LOCAL0    Reserved for local use.

       LOG_LOCAL1    Reserved for local use.

       LOG_LOCAL2    Reserved for local use.

       LOG_LOCAL3    Reserved for local use.

       LOG_LOCAL4    Reserved for local use.

       LOG_LOCAL5    Reserved for local use.

       LOG_LOCAL6    Reserved for local use.

       LOG_LOCAL7    Reserved for local use.

       The <syslog.h> header shall define the following macros for
       constructing the maskpri argument to setlogmask().  The following
       macros expand to an expression of type int when the argument pri
       is an expression of type int:

       LOG_MASK(pri) A mask for priority pri.

       The <syslog.h> header shall define the following symbolic
       constants for use as the priority argument of syslog():

       LOG_EMERG     A panic condition was reported to all processes.

       LOG_ALERT     A condition that should be corrected immediately.

       LOG_CRIT      A critical condition.

       LOG_ERR       An error message.

       LOG_WARNING   A warning message.

       LOG_NOTICE    A condition requiring special handling.

       LOG_INFO      A general information message.

       LOG_DEBUG     A message useful for debugging programs.

       The following shall be declared as functions and may also be
       defined as macros. Function prototypes shall be provided.

           void  closelog(void);
           void  openlog(const char *, int, int);
           int   setlogmask(int);
           void  syslog(int, const char *, ...);

       The following sections are informative.

APPLICATION USAGE         top

       None.

RATIONALE         top

       None.

FUTURE DIRECTIONS         top

       None.

SEE ALSO         top

       The System Interfaces volume of POSIX.1‐2017, closelog(3p)

COPYRIGHT         top

       Portions of this text are reprinted and reproduced in electronic
       form from IEEE Std 1003.1-2017, Standard for Information
       Technology -- Portable Operating System Interface (POSIX), The
       Open Group Base Specifications Issue 7, 2018 Edition, Copyright
       (C) 2018 by the Institute of Electrical and Electronics
       Engineers, Inc and The Open Group.  In the event of any
       discrepancy between this version and the original IEEE and The
       Open Group Standard, the original IEEE and The Open Group
       Standard is the referee document. The original Standard can be
       obtained online at http://www.opengroup.org/unix/online.html .

       Any typographical or formatting errors that appear in this page
       are most likely to have been introduced during the conversion of
       the source files to man page format. To report such errors, see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group               2017                      syslog.h(0P)

Pages that refer to this page: closelog(3p)