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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 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.

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 4.09 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/.

                              2015-08-08                     SETLOGMASK(3)



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