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SETLOGMASK(3) Linux Programmer's Manual SETLOGMASK(3)
NAME
setlogmask - set log priority mask
SYNOPSIS
#include <syslog.h>
int setlogmask(int mask);
DESCRIPTION
A process has a log priority mask that determines which calls to sys-
log(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 correspond-
ing 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.
RETURN VALUE
This function returns the previous log priority mask.
ERRORS
None.
CONFORMING TO
POSIX.1-2001. Note that the description in POSIX.1-2001 is flawed.
SEE ALSO
closelog(3), openlog(3), syslog(3)
COLOPHON
This page is part of release 3.69 of the Linux man-pages project. A
description of the project, information about reporting bugs, and the
latest version of this page, can be found at
http://www.kernel.org/doc/man-pages/.
2001-10-05 SETLOGMASK(3)
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