lfs-book-zh_CN/lsb-bootscripts/etc/init.d/cleanfs

#!/bin/sh
# Begin $RC_BASE/init.d/cleanfs

### BEGIN INIT INFO
# Provides:            cleanfs
# Required-Start:      $local_fs
# Should-Start:
# Required-Stop:
# Should-Stop:
# Default-Start:       S
# Default-Stop:        
# Short-Description:   Cleans and prepares the temporary directory.
# Description:         Cleans the temporary directory /tmp and creates the
#                      /var/run/utmp file and any other files defined in
#                      /etc/default/createfiles.
# X-LFS-Provided-By:   LFS
### END INIT INFO

. /lib/lsb/init-functions

# Function to create files/directory on boot.
create_files()
{
    # Read in the configuration file.
    exec 9>&0 < /etc/default/createfiles
    while read name type perm usr grp dtype maj min junk
    do
        # Ignore comments and blank lines.
        case "${name}" in
            ""|\#*) continue ;;
        esac

        # Ignore existing files.
        if [ ! -e "${name}" ]
        then
            # Create stuff based on its type.
            case "${type}" in
                dir)
                    mkdir "${name}"
                    ;;
                file)
                    :> "${name}"
                    ;;
                dev)
                    case "${dtype}" in
                        char)
                            mknod "${name}" c ${maj} ${min}
                            ;;
                        block)
                            mknod "${name}" b ${maj} ${min}
                            ;;
                        pipe)
                            mknod "${name}" p
                            ;;
                        *) 
                            echo -e -n "\n${WARNING}Unknown device type: ${dtype}"
                            echo -e "${NORMAL}"
                            ;;
                    esac
                    ;;
                *)
                    echo -e "\n${WARNING}Unknown type: ${type}${NORMAL}"
                    continue
                    ;;
            esac

            # Set up the permissions, too.
            chown ${usr}:${grp} "${name}"
            chmod ${perm} "${name}"
        fi
    done
    exec 0>&9 9>&-
}

case "${1}" in
    start)
        message="Cleaning file systems: "

        message="${message}${INFO} /tmp"
        find /tmp -xdev -mindepth 1 ! -name lost+found \
            -delete || failed=1

        > /var/run/utmp
        if grep -q '^utmp:' /etc/group ; then
            chmod 664 /var/run/utmp
            chgrp utmp /var/run/utmp
        fi

        (exit ${failed})
        evaluate_retval standard

        if egrep -qv '^(#|$)' /etc/default/createfiles 2>/dev/null
        then
            message="Creating files and directories..."
            create_files
            evaluate_retval standard
        fi
        ;;
    *)
        echo "Usage: ${0} {start}"
        exit 1
        ;;
esac

# End $RC_BASE/init.d/cleanfs