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SETLOGMASK(3) Linux Programmer's Manual SETLOGMASK(3)
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 cor-
responding bit set in mask. The initial mask is such that logging is enabled for all pri-
The setlogmask() function sets this logmask for the current process, and returns the pre-
vious 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 sys-
tems 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.
XPG4. Note that the description in POSIX 1003.1-2001 is flawed.
closelog(3), openlog(3), syslog(3)
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