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.

       LOG_UPTO() will be included in the next release of the POSIX specification (Issue 8).

SEE ALSO

       closelog(3), openlog(3), syslog(3)

COLOPHON

       This page is part of release 5.10 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/.

                                            2020-06-09                              SETLOGMASK(3)