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setlogmask - set log priority mask
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.
POSIX.1-2001. Note that the description in POSIX.1-2001 is flawed.
closelog(3), openlog(3), syslog(3)
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