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+'\" et
+.TH syslog.h "0P" 2013 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.SH PROLOG
+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.
+
+.SH NAME
+syslog.h
+\(em definitions for system error logging
+.SH SYNOPSIS
+.LP
+.nf
+#include <syslog.h>
+.fi
+.SH DESCRIPTION
+The
+.IR <syslog.h>
+header shall define the following symbolic constants, zero or more
+of which may be OR'ed together to form the
+.IR logopt
+option of
+\fIopenlog\fR():
+.IP LOG_PID 14
+Log the process ID with each message.
+.IP LOG_CONS 14
+Log to the system console on error.
+.IP LOG_NDELAY 14
+Connect to syslog daemon immediately.
+.IP LOG_ODELAY 14
+Delay open until
+\fIsyslog\fR()
+is called.
+.IP LOG_NOWAIT 14
+Do not wait for child processes.
+.P
+The
+.IR <syslog.h>
+header shall define the following symbolic constants for use as the
+.IR facility
+argument to
+\fIopenlog\fR():
+.IP LOG_KERN 14
+Reserved for message generated by the system.
+.IP LOG_USER 14
+Message generated by a process.
+.IP LOG_MAIL 14
+Reserved for message generated by mail system.
+.IP LOG_NEWS 14
+Reserved for message generated by news system.
+.IP LOG_UUCP 14
+Reserved for message generated by UUCP system.
+.IP LOG_DAEMON 14
+Reserved for message generated by system daemon.
+.IP LOG_AUTH 14
+Reserved for message generated by authorization daemon.
+.IP LOG_CRON 14
+Reserved for message generated by clock daemon.
+.IP LOG_LPR 14
+Reserved for message generated by printer system.
+.IP LOG_LOCAL0 14
+Reserved for local use.
+.IP LOG_LOCAL1 14
+Reserved for local use.
+.IP LOG_LOCAL2 14
+Reserved for local use.
+.IP LOG_LOCAL3 14
+Reserved for local use.
+.IP LOG_LOCAL4 14
+Reserved for local use.
+.IP LOG_LOCAL5 14
+Reserved for local use.
+.IP LOG_LOCAL6 14
+Reserved for local use.
+.IP LOG_LOCAL7 14
+Reserved for local use.
+.P
+The
+.IR <syslog.h>
+header shall define the following macros for constructing the
+.IR maskpri
+argument to
+\fIsetlogmask\fR().
+The following macros expand to an expression of type
+.BR int
+when the argument
+.IR pri
+is an expression of type
+.BR int :
+.IP "LOG_MASK(\fIpri\fR)" 14
+A mask for priority
+.IR pri .
+.P
+The
+.IR <syslog.h>
+header shall define the following symbolic constants for use as the
+.IR priority
+argument of
+\fIsyslog\fR():
+.IP LOG_EMERG 14
+A panic condition was reported to all processes.
+.IP LOG_ALERT 14
+A condition that should be corrected immediately.
+.IP LOG_CRIT 14
+A critical condition.
+.IP LOG_ERR 14
+An error message.
+.IP LOG_WARNING 14
+A warning message.
+.IP LOG_NOTICE 14
+A condition requiring special handling.
+.IP LOG_INFO 14
+A general information message.
+.IP LOG_DEBUG 14
+A message useful for debugging programs.
+.P
+The following shall be declared as functions and may also be defined
+as macros. Function prototypes shall be provided.
+.sp
+.RS 4
+.nf
+\fB
+void closelog(void);
+void openlog(const char *, int, int);
+int setlogmask(int);
+void syslog(int, const char *, ...);
+.fi \fR
+.P
+.RE
+.LP
+.IR "The following sections are informative."
+.SH "APPLICATION USAGE"
+None.
+.SH RATIONALE
+None.
+.SH "FUTURE DIRECTIONS"
+None.
+.SH "SEE ALSO"
+The System Interfaces volume of POSIX.1\(hy2008,
+.IR "\fIcloselog\fR\^(\|)"
+.SH COPYRIGHT
+Portions of this text are reprinted and reproduced in electronic form
+from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
+-- Portable Operating System Interface (POSIX), The Open Group Base
+Specifications Issue 7, Copyright (C) 2013 by the Institute of
+Electrical and Electronics Engineers, Inc and The Open Group.
+(This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) 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.unix.org/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 .