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.
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.
This page is part of release 3.14 of the Linux
man-pages
project.
A description of the project,
and information about reporting bugs,
can be found at
http://www.kernel.org/doc/man-pages/.
