Do a better job of supporting more than one mouse device

on the system.

To start/stop/check on a specific device give the device name as
the second argument to the script:
	# /etc/rc.d/moused start ums0

To use different rc.conf(5) knobs with different mice use the device
name as part of the knob. For example, if the mouse device is ums0, then:
	moused_ums0_enable=yes
	moused_ums0_flags="-z 4"
	moused_ums0_port="/dev/ums0"

Starting rc.d/moused without the device argument will use the standard
moused_* flags. So, this commit should not disrupt or change current usage.

To preserve current behaviour with respect to usb mice, which appear
automatically when inserted, there is a new knob, moused_nondefault_enable,
which will treat any devices without rc.conf knobs as enabled.

To minimize knobs in /etc/rc.conf, the device file and pid file are
auto-computed, so that in the typical case for a usb mouse you don't
need to add anything extra in /etc/rc.conf to get it working.

Additionally, this updates /etc/usbd.conf to use the rc.d/moused script so
people don't have to modify it to configure their usb mouse anymore.

MFC after: 1 month

etc/defaults/rc.conf

@@ -362,6 +362,8 @@ font8x14="NO"		# font 8x14 from /usr/share/syscons/fonts/* (or NO).
 font8x8="NO"		# font 8x8 from /usr/share/syscons/fonts/* (or NO).
 blanktime="300"		# blank time (in seconds) or "NO" to turn it off.
 saver="NO"		# screen saver: Uses /boot/kernel/${saver}_saver.ko
+moused_nondefault_enable="YES" # Treat non-default mice as enabled unless
+			       # specifically overriden in rc.conf(5).
 moused_enable="NO"	# Run the mouse daemon.
 moused_type="auto"	# See man page for rc.conf(5) for available settings.
 moused_port="/dev/psm0"	# Set to your mouse port.

etc/rc.d/moused

@@ -14,11 +14,47 @@ name=moused
 rcvar=`set_rcvar`
 command="/usr/sbin/${name}"
 start_cmd="moused_start"
+_pidprefix="/var/run/moused"
+pidfile="${_pidprefix}.pid"
+_pidarg=
+load_rc_config $name
+
+# Set the pid file and variable name. The second argument, if it exists, is
+# expected to be the mouse device.
+#
+if [ -n "$2" ]; then
+	checkyesno moused_nondefault_enable &&
+	    eval moused_$2_enable=\${moused_$2_enable-YES}
+	rcvar=`set_rcvar moused_$2`
+	pidfile="${_pidprefix}.$2.pid"
+	_pidarg="-I $pidfile"
+fi
 
 moused_start()
 {
-	echo -n 'Starting moused:'
-	/usr/sbin/moused ${moused_flags} -p ${moused_port} -t ${moused_type}
+	local ms myflags myport mytype
+
+	# Set the mouse device and get any related variables. If
+	# a moused device has been specified on the commandline, then
+	# rc.conf(5) variables defined for that device take precedence
+	# over the generic moused_* variables. The only exception is
+	# the moused_port variable, which if not defined sets it to the
+	# passed in device name.
+	#
+	ms=$1
+	if [ -n "$ms" ]; then
+		eval myflags=\${moused_${ms}_flags-$moused_flags}
+		eval myport=\${moused_${ms}_port-/dev/$ms}
+		eval mytype=\${moused_${ms}_type-$moused_type}
+	else
+		ms="default"
+		myflags="$moused_flags"
+		myport="$moused_port"
+		mytype="$moused_type"
+	fi
+
+	echo -n "Starting ${ms} moused:"
+	/usr/sbin/moused ${myflags} -p ${myport} -t ${mytype} ${_pidarg}
 
 	_mousechar_arg=
 	case ${mousechar_start} in
@@ -36,5 +72,4 @@ moused_start()
 	echo '.'
 }
 
-load_rc_config $name
-run_rc_command "$1"
+run_rc_command $*

etc/usbd.conf

@@ -46,7 +46,7 @@ device "Handspring Visor"
 #
 device "Mouse"
 	devname "ums[0-9]+"
-	attach "/usr/sbin/moused -p /dev/${DEVNAME} -I /var/run/moused.${DEVNAME}.pid ; /usr/sbin/vidcontrol -m on"
+	attach "/etc/rc.d/moused start ${DEVNAME}"
 
 # The fallthrough entry: Nothing is specified, nothing is done.  And it isn't
 # necessary at all :-).  Just for pretty printing in debugging mode.

share/man/man5/rc.conf.5

@@ -2223,6 +2223,21 @@ If not set to
 this is the actual screen saver to use
 .Li ( blank , snake , daemon ,
 etc).
+.It Va moused_nondefault_enable
+.Pq Vt str
+If set to
+.Dq Li NO
+the mouse device specified on
+the command line is not automatically treated as enabled by the
+.Pa /etc/rc.d/moused
+script.
+Having this variable set to
+.Dq Li YES
+allows a
+.Xr usb 4
+mouse,
+for example,
+to be enabled as soon as it is plugged in.
 .It Va moused_enable
 .Pq Vt str
 If set to