.Fl x Ar file Ar expression
.D1 ""
.Nm
-.Fl c Ar process Op filter
+.Fl c Ar process Op mask
.D1 ""
.Nm
.Fl config Op options
The
.Fl c
option may be used to control filtering.
-In addition to the internal filter value that processes may set as described above,
+In addition to the internal filter mask value that processes may set as described above,
the system maintains a global
.Dq master
-filter.
+filter mask.
This filter is normally
.Dq off ,
meaning that it has no effect.
-If a value is set for the master filter, it overrides the local filter for all processes.
-Root user access is required to set the master filter value.
+If a value is set for the master filter mask, it overrides the local filter mask for all processes.
+Root user access is required to set the master filter mask value.
.Pp
The current setting of the master filter mask may be inspected using:
.Pp
The character
.Dq x
may be used for Error, as it is used for sending messages.
-The master filter may be unset with:
+The master filter mask may be deactivated with:
.Pp
.Dl syslog -c 0 off
.Pp
-Since it is common to use the filter as a
+Since it is common to use the filter mask as a
.Dq cutoff
mechanism, for example to cut off messages with Debug and Info priority,
a single character from the list above may be specified, preceded by a minus sign.
uses a filter mask starting at level 0 (Emergency)
.Dq up to
the given level.
-For example, to set the master filter level to cause all processes to log messages from Emergency up to Debug:
+For example, to set the master filter mask to cause all processes to log messages from Emergency up to Debug:
.Pp
.Dl syslog -c 0 -d
.Pp
-While the master filter level may be set to control the messages produced by all processes,
+While the master filter mask may be set to control the messages produced by all processes,
another filter mask may be specified for an individual process.
If a per-process filter mask is set, it overrides both the local filter mask and the master filter mask.
The current setting for a per-process filter mask may be inspected using