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
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
This function returns the previous log priority mask.
LOG_UPTO() will be included in the next release of the POSIX specification (Issue 8).
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