#!/bin/sh
"""": # -*-python-*-
bup_python="$(dirname "$0")/../cmd/bup-python" || exit $?
exec "$bup_python" "$0" ${1+"$@"}
"""

from sys import stderr
import os.path, re, subprocess, sys

def mntent_unescape(x):
    def replacement(m):
        unescapes = {
            "\\\\" : "\\",
            "\\011" : "\t",
            "\\012" : "\n",
            "\\040" : " "
        }
        return unescapes.get(m.group(0))
    return re.sub(r'(\\\\|\\011|\\012|\\040)', replacement, x)

targets = sys.argv[1:]

if not os.path.exists('/proc/mounts'):
    print >> stderr, 'No /proc/mounts; skipping mount cleanup in', repr(targets)
    sys.exit(0)

exit_status = 0
for target in targets:
    if not os.path.isdir(target):
        print >> stderr, repr(target), 'is not a directory'
        exit_status = 1
        continue
    top = os.path.realpath(target)
    proc_mounts = open('/proc/mounts', 'r')
    for line in proc_mounts:
        _, point, fstype, _ = line.split(' ', 3)
        point = mntent_unescape(point)
        if top == point or os.path.commonprefix((top + '/', point)) == top + '/':
            if fstype.startswith('fuse'):
                if subprocess.call(['fusermount', '-uz', point]) != 0:
                    exit_status = 1
            else:
                if subprocess.call(['umount', '-l', point]) != 0:
                    exit_status = 1

sys.exit(exit_status)