Linux 2.6 - man page for setlogmask (linux section 3)
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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 calling 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.
POSIX.1-2001. Note that the description in POSIX.1-2001 is flawed.
closelog(3), openlog(3), syslog(3)
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