1SETLOGMASK(3)              Linux Programmer's Manual             SETLOGMASK(3)
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NAME

6       setlogmask - set log priority mask
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SYNOPSIS

9       #include <syslog.h>
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11       int setlogmask(int mask);
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DESCRIPTION

14       A  process  has a log priority mask that determines which calls to sys‐
15       log(3) may be logged.  All other calls will  be  ignored.   Logging  is
16       enabled for the priorities that have the corresponding bit set in mask.
17       The initial mask is such that logging is enabled for all priorities.
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19       The setlogmask() function sets this logmask for  the  calling  process,
20       and  returns the previous mask.  If the mask argument is 0, the current
21       logmask is not modified.
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23       The eight  priorities  are  LOG_EMERG,  LOG_ALERT,  LOG_CRIT,  LOG_ERR,
24       LOG_WARNING,  LOG_NOTICE, LOG_INFO, and LOG_DEBUG.  The bit correspond‐
25       ing to a priority p is LOG_MASK(p).  Some systems also provide a  macro
26       LOG_UPTO(p)  for the mask of all priorities in the above list up to and
27       including p.
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RETURN VALUE

30       This function returns the previous log priority mask.
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ERRORS

33       None.
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ATTRIBUTES

36       For  an  explanation  of  the  terms  used   in   this   section,   see
37       attributes(7).
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39       ┌─────────────┬───────────────┬────────────────────────┐
40       │Interface    │ Attribute     │ Value                  │
41       ├─────────────┼───────────────┼────────────────────────┤
42       │setlogmask() │ Thread safety │ MT-Unsafe race:LogMask │
43       └─────────────┴───────────────┴────────────────────────┘
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CONFORMING TO

46       POSIX.1-2001, POSIX.1-2008.
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SEE ALSO

49       closelog(3), openlog(3), syslog(3)
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COLOPHON

52       This  page  is  part of release 4.15 of the Linux man-pages project.  A
53       description of the project, information about reporting bugs,  and  the
54       latest     version     of     this    page,    can    be    found    at
55       https://www.kernel.org/doc/man-pages/.
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59                                  2017-09-15                     SETLOGMASK(3)
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