setlogmask - set log priority mask
#include <syslog.h>
int setlogmask(int mask);
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.
This function returns the previous log priority mask.
None.
For an explanation of the terms used in this section, see
attributes(7).
| Interface |
Attribute |
Value |
| setlogmask () |
Thread safety |
MT-Unsafe race:LogMask |
POSIX.1-2001, POSIX.1-2008.
closelog(3),
openlog(3),
syslog(3)