mirror of https://github.com/mkerrisk/man-pages
103 lines
2.8 KiB
Groff
103 lines
2.8 KiB
Groff
.\" Copyright (C) 2001 Andries Brouwer <aeb@cwi.nl>.
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.\"
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.\" %%%LICENSE_START(VERBATIM)
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.\" Permission is granted to make and distribute verbatim copies of this
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.\" manual provided the copyright notice and this permission notice are
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.\" preserved on all copies.
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.\"
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.\" Permission is granted to copy and distribute modified versions of this
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.\" manual under the conditions for verbatim copying, provided that the
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.\" entire resulting derived work is distributed under the terms of a
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.\" permission notice identical to this one.
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.\"
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.\" Since the Linux kernel and libraries are constantly changing, this
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.\" manual page may be incorrect or out-of-date. The author(s) assume no
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.\" responsibility for errors or omissions, or for damages resulting from
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.\" the use of the information contained herein. The author(s) may not
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.\" have taken the same level of care in the production of this manual,
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.\" which is licensed free of charge, as they might when working
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.\" professionally.
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.\"
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.\" Formatted or processed versions of this manual, if unaccompanied by
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.\" the source, must acknowledge the copyright and authors of this work.
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.\" %%%LICENSE_END
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.\"
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.TH SETLOGMASK 3 2021-03-22 "" "Linux Programmer's Manual"
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.SH NAME
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setlogmask \- set log priority mask
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.SH SYNOPSIS
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.nf
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.B #include <syslog.h>
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.PP
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.BI "int setlogmask(int " mask );
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.fi
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.SH DESCRIPTION
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A process has a log priority mask that determines which calls to
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.BR syslog (3)
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may be logged.
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All other calls will be ignored.
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Logging is enabled for the priorities that have the corresponding
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bit set in
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.IR mask .
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The initial mask is such that logging is enabled for all priorities.
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.PP
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The
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.BR setlogmask ()
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function sets this logmask for the calling process,
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and returns the previous mask.
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If the mask argument is 0, the current logmask is not modified.
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.PP
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The eight priorities are
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.BR LOG_EMERG ,
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.BR LOG_ALERT ,
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.BR LOG_CRIT ,
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.BR LOG_ERR ,
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.BR LOG_WARNING ,
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.BR LOG_NOTICE ,
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.BR LOG_INFO ,
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and
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.BR LOG_DEBUG .
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The bit corresponding to a priority
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.I p
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is
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.IR LOG_MASK(p) .
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Some systems also provide a macro
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.IR LOG_UPTO(p)
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for the mask
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of all priorities in the above list up to and including
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.IR p .
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.SH RETURN VALUE
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This function returns the previous log priority mask.
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.SH ERRORS
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None.
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.\" .SH NOTES
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.\" The glibc logmask handling was broken in versions before glibc 2.1.1.
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.SH ATTRIBUTES
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For an explanation of the terms used in this section, see
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.BR attributes (7).
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.ad l
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.nh
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.TS
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allbox;
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lbx lb lb
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l l l.
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Interface Attribute Value
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T{
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.BR setlogmask ()
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T} Thread safety MT-Unsafe race:LogMask
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.TE
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.hy
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.ad
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.sp 1
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.SH CONFORMING TO
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POSIX.1-2001, POSIX.1-2008.
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.\" Note that the description in POSIX.1-2001 is flawed.
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.PP
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.BR LOG_UPTO ()
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will be included in the next release of the POSIX specification (Issue 8).
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.\" FIXME . https://www.austingroupbugs.net/view.php?id=1033
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.SH SEE ALSO
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.BR closelog (3),
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.BR openlog (3),
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.BR syslog (3)
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