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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | ATTRIBUTES | STANDARDS | HISTORY | SEE ALSO | COLOPHON |
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setlogmask(3) Library Functions Manual setlogmask(3)
setlogmask - set log priority mask
Standard C library (libc, -lc)
#include <syslog.h>
int setlogmask(int mask);
A process has a log priority mask that determines which calls to
syslog(3) may be logged. All other calls will be ignored.
Logging is enabled for the priorities that have the corresponding
bit set in mask. The initial mask is such that logging is
enabled for all priorities.
The setlogmask() function sets this logmask for the calling
process, and returns the previous mask. If the mask argument is
0, the current logmask is not modified.
The eight 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). Some systems also
provide a macro LOG_UPTO(p) for the mask of all priorities in the
above list up to and including p.
This function returns the previous log priority mask.
None.
For an explanation of the terms used in this section, see
attributes(7).
┌──────────────────────┬───────────────┬────────────────────────┐
│ Interface │ Attribute │ Value │
├──────────────────────┼───────────────┼────────────────────────┤
│ setlogmask() │ Thread safety │ MT-Unsafe race:LogMask │
└──────────────────────┴───────────────┴────────────────────────┘
POSIX.1-2008.
POSIX.1-2001.
LOG_UPTO() will be included in the next release of the POSIX
specification (Issue 8).
closelog(3), openlog(3), syslog(3)
This page is part of the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
the project can be found at
⟨https://www.kernel.org/doc/man-pages/⟩. If you have a bug report
for this manual page, see
⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
This page was obtained from the tarball man-pages-6.9.1.tar.gz
fetched from
⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
2024-06-26. If you discover any rendering problems in this HTML
version of the page, or you believe there is a better or more up-
to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not
part of the original manual page), send a mail to
[email protected]
Linux man-pages 6.9.1 2024-05-02 setlogmask(3)
Pages that refer to this page: syslog(3), org.freedesktop.LogControl1(5)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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