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//usr/sbin      ( Reset | Go to )
File Name: xfs_info
#!/bin/sh -f
# SPDX-License-Identifier: GPL-2.0
#
# Copyright (c) 2000-2001 Silicon Graphics, Inc.  All Rights Reserved.
#

OPTS=""
USAGE="Usage: xfs_info [-V] [-t mtab] [mountpoint|device|file]"

# Try to find a loop device associated with a file.  We only want to return
# one loopdev (multiple loop devices can attach to a single file) so we grab
# the last line and return it if it's actually a block device.
try_find_loop_dev_for_file() {
    local x="$(losetup -O NAME -j "$1" 2> /dev/null | tail -n 1)"
    test -b "$x" && echo "$x"
}

while getopts "t:V" c
do
    case $c in
    t)    OPTS="-t $OPTARG" ;;
    V)    xfs_spaceman -p xfs_info -V
        status=$?
        exit $status
        ;;
    *)    echo $USAGE 1>&2
        exit 2
        ;;
    esac
done
set -- extra "$@"
shift $OPTIND
case $# in
    1)
        arg="$1"

        # See if we can map the arg to a loop device
        loopdev="$(try_find_loop_dev_for_file "${arg}")"
        test -n "${loopdev}" && arg="${loopdev}"

        # If we find a mountpoint for the device, do a live query;
        # otherwise try reading the fs with xfs_db.
        if mountpt="$(findmnt -f -n -o TARGET "${arg}" 2> /dev/null)"; then
            xfs_spaceman -p xfs_info -c "info" $OPTS "${mountpt}"
            status=$?
        else
            xfs_db -p xfs_info -c "info" $OPTS "${arg}"
            status=$?
        fi
        ;;
    *)    echo $USAGE 1>&2
        exit 2
        ;;
esac
exit $status

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