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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 sys-
     log(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 correspond-
     ing 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 4.16 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)