lfs-book-zh_CN/bootscripts/lfs/init.d/consolelog

#!/bin/sh
# Begin $rc_base/init.d/consolelog

########################################################################
#
# Description : Set the kernel log level for the console
#
# Authors     : Dan Nicholson - dnicholson@linuxfromscratch.org
#
# Version     : 00.00
#
# Notes       : /proc must be mounted before this can run
#
########################################################################

. /etc/sysconfig/rc
. ${rc_functions}

# set the default loglevel
LOGLEVEL=7
if [ -r /etc/sysconfig/console ]; then
	. /etc/sysconfig/console
fi

case "${1}" in
	start)
		case "$LOGLEVEL" in
		[1-8])
			boot_mesg "Setting the console log level to ${LOGLEVEL}..."
			dmesg -n $LOGLEVEL
			evaluate_retval
			;;
		*)
			boot_mesg "Console log level '${LOGLEVEL}' is invalid" ${FAILURE}
			echo_failure
			;;
		esac
		;;
	status)
		# Read the current value if possible
		if [ -r /proc/sys/kernel/printk ]; then
			read level line < /proc/sys/kernel/printk
		else
			boot_mesg "Can't read the current console log level" ${FAILURE}
			echo_failure
		fi

		# Print the value
		if [ -n "$level" ]; then
			${ECHO} -e "${INFO}The current console log level" \
				"is ${level}${NORMAL}"
		fi
		;;

	*)
		echo "Usage: ${0} {start|status}"
		exit 1
		;;
esac

# End $rc_base/init.d/consolelog