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

#!/bin/sh
########################################################################
# Begin mountvirtfs
#
# Description : Mount proc, sysfs, and run
#
# Authors     : Gerard Beekmans - gerard@linuxfromscratch.org
#               DJ Lucas - dj@linuxfromscratch.org
# Update      : Bruce Dubbs - bdubbs@linuxfromscratch.org
#
# Version     : LFS 7.0
#
########################################################################

### BEGIN INIT INFO
# Provides:            mountvirtfs
# Required-Start:
# Should-Start:
# Required-Stop:
# Should-Stop:
# Default-Start:       S
# Default-Stop:
# Short-Description:   Mounts /sys and /proc virtual (kernel) filesystems.
#                      Mounts /run tmpfs.
# Description:         Mounts /sys and /proc virtual (kernel) filesystems.
#                      Mounts /run tmpfs.
# X-LFS-Provided-By:   LFS
### END INIT INFO

. /lib/lsb/init-functions

case "${1}" in
   start)
      # Make sure /run/var is available before logging any messages
      mkdir -p /run
      mount -n /run || failed=1
      mkdir -p /run/{var,lock,shm}
      chmod 1777 /run/shm

      log_info_msg "Mounting virtual file systems: ${INFO}/run" 

      if ! mountpoint /proc >/dev/null; then
         log_info_msg2 " ${INFO}/proc"
         mount -n -o nosuid,noexec,nodev /proc || failed=1
      fi

      if ! mountpoint /sys >/dev/null; then
         log_info_msg2 " ${INFO}/sys" 
         mount -n -o nosuid,noexec,nodev /sys || failed=1
      fi

      if ! mountpoint /dev >/dev/null; then
         log_info_msg2 " ${INFO}/dev" 
         mount -n -o mode=0755,nosuid /dev  || failed=1
      fi

      ln -s /run/shm /dev/shm
      
      # Copy the only static device node that Udev >= 155 doesn't
      # handle to /dev
      cp -a /lib/udev/devices/null /dev

      (exit ${failed})
      evaluate_retval
      exit $failed
      ;;

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

# End mountvirtfs