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

#!/bin/sh
########################################################################
# Begin checkfs
#
# Description : File System Check
#
# Authors     : Gerard Beekmans - gerard@linuxfromscratch.org
#               A. Luebke - luebke@users.sourceforge.net
#               DJ Lucas - dj@linuxfromscratch.org
# Update      : Bruce Dubbs - bdubbs@linuxfromscratch.org
#
# Version     : LFS 7.0
#
# Based on checkfs script from LFS-3.1 and earlier.
#
# From man fsck
# 0    - No errors
# 1    - File system errors corrected
# 2    - System should be rebooted
# 4    - File system errors left uncorrected
# 8    - Operational error
# 16   - Usage or syntax error
# 32   - Fsck canceled by user request
# 128  - Shared library error
#
#########################################################################

### BEGIN INIT INFO
# Provides:            checkfs
# Required-Start:      udev swap $time
# Should-Start:
# Required-Stop:
# Should-Stop:
# Default-Start:       S
# Default-Stop:
# Short-Description:   Checks local filesystems before mounting.
# Description:         Checks local filesystmes before mounting.
# X-LFS-Provided-By:   LFS
### END INIT INFO

. /lib/lsb/init-functions

case "${1}" in
   start)
      if [ -f /fastboot ]; then
         msg="/fastboot found, will omit "
         msg="${msg} file system checks as requested.\n"
         log_info_msg "${msg}"
         exit 0
      fi

      log_info_msg "Mounting root file system in read-only mode... "
      mount -n -o remount,ro / >/dev/null

      if [ ${?} != 0 ]; then
         log_failure_msg2
         msg="\n\nCannot check root "
         msg="${msg}filesystem because it could not be mounted "
         msg="${msg}in read-only mode.\n\n"
         msg="${msg}After you press Enter, this system will be "
         msg="${msg}halted and powered off.\n\n"
         log_failure_msg "${msg}"

         log_info_msg "Press Enter to continue..." 
         wait_for_user
         /etc/rc.d/init.d/halt stop
      else
         log_success_msg2
      fi

      if [ -f /forcefsck ]; then
         msg="\n/forcefsck found, forcing file" 
         msg="${msg} system checks as requested."
         log_success_msg "$msg"
         options="-f"
      else
         options=""
      fi

      log_info_msg "Checking file systems..."
      # Note: -a option used to be -p; but this fails e.g. on fsck.minix
      fsck ${options} -a -A -C -T >/dev/null
      error_value=${?}

      if [ "${error_value}" = 0 ]; then
         log_success_msg2
      fi

      if [ "${error_value}" = 1 ]; then
         msg="\nWARNING:\n\nFile system errors "
         msg="${msg}were found and have been corrected.\n"
         msg="${msg}You may want to double-check that "
         msg="${msg}everything was fixed properly."
         log_warning_msg "$msg"
      fi

      if [ "${error_value}" = 2 -o "${error_value}" = 3 ]; then
         msg="\nWARNING:\n\nFile system errors "
         msg="${msg}were found and have been been "
         msg="${msg}corrected, but the nature of the "
         msg="${msg}errors require this system to be rebooted.\n\n"
         msg="${msg}After you press enter, "
         msg="${msg}this system will be rebooted\n\n"
         log_failure_msg "$msg"

         log_info_msg "Press Enter to continue..." 
         wait_for_user
         reboot -f
      fi

      if [ "${error_value}" -gt 3 -a "${error_value}" -lt 16 ]; then
         msg="\nFAILURE:\n\nFile system errors "
         msg="${msg}were encountered that could not be "
         msg="${msg}fixed automatically.  This system "
         msg="${msg}cannot continue to boot and will "
         msg="${msg}therefore be halted until those "
         msg="${msg}errors are fixed manually by a "
         msg="${msg}System Administrator.\n\n"
         msg="${msg}After you press Enter, this system will be "
         msg="${msg}halted and powered off.\n\n"
         log_failure_msg "$msg"

         log_info_msg "Press Enter to continue..." 
         wait_for_user
         /etc/rc.d/init.d/halt stop
      fi

      if [ "${error_value}" -ge 16 ]; then
         msg="\nFAILURE:\n\nUnexpected Failure "
         msg="${msg}running fsck.  Exited with error "
         msg="${msg} code: ${error_value}."
         log_failure_msg $msg
         exit ${error_value}
      fi

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

# End checkfs