mojave man page for setlogmask

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 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  priori-
       ties.

       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.

ATTRIBUTES
       For an explanation of the terms used in this section, see attributes(7).

       +-------------+---------------+------------------------+
       |Interface    | Attribute     | Value                  |
       +-------------+---------------+------------------------+
       |setlogmask() | Thread safety | MT-Unsafe race:LogMask |
       +-------------+---------------+------------------------+

CONFORMING TO
       POSIX.1-2001, POSIX.1-2008.

SEE ALSO
       closelog(3), openlog(3), syslog(3)

COLOPHON
       This page is part of release 4.15 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 https://www.kernel.org/doc/man-pages/.

                                                                    2017-09-15                                                       SETLOGMASK(3)