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 sys-
       log(3) may be logged.  All other calls will be ignored.  Logging is en-
       abled  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  at-
       tributes(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 5.05 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)