fsck.btrfs from http://beefdrapes.partedmagic.com/source/btrfs-progs/fsck.btrfs

fsck.btrfs

#!/bin/sh
#
### http://beefdrapes.partedmagic.com/source/btrfs-progs/fsck.btrfs
### 2013-08-07
#
# Copyright 2011  Patrick J. Volkerding, Sebeka, Minnesota, USA
# All rights reserved.
#
# Redistribution and use of this script, with or without modification, is
# permitted provided that the following conditions are met:
#
# 1. Redistributions of this script must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

# Currently, btrfsck does not recognize any options, so eat any initial options
# beginning with '-'.  Then, check the remaining args with btrfsck only if they
# exist and are readable.

# Strip initial args:
while [ ! -z "$1" ]; do
  if [ "$(echo $1 | cut -b1)" = "-" ]; then
    shift # strip option from command line
  else
    break
  fi
done

# Main filesystem check loop:
RETVAL=0
while [ ! -z "$1" ]; do
  if [ -r "$1" ]; then
    echo "fsck.btrfs:  Checking filesystem on $1"
    # Checking the root filesystem (even read-only) will fail, check for that:
    if ! grep -w "$1" /etc/fstab | grep -wq / ; then
      btrfsck "$1"
      ERRCODE=$?
      if [ ! $ERRCODE = 0 ]; then
        RETVAL=$ERRCODE
      fi
    else
      echo "  $1 mounted on /, skipped."
    fi
  fi
  shift
done

# If there was an error, return the most recent error code:
exit $RETVAL