dev/cleanup-mounts-under

   1 #!/bin/sh
   2 """": # -*-python-*-
   3 # This command is used by "make clean", so don't rely on ./configure
   4 set -e
   5 for python in \
   6     python3 \
   7     python3.9 \
   8     python3.8 \
   9     python3.7 \
  10     python3.6 \
  11     python \
  12     python2.7; do \
  13     if command -v "$python"; then
  14         exec "$python" "$0" "$@"
  15     fi
  16 done
  17 echo "error: unable to find suitable python executable; please report" 1>&2
  18 exit 2
  19 """
  20
  21 from __future__ import absolute_import, print_function
  22 from sys import stderr
  23 import os.path, re, subprocess, sys
  24
  25 def mntent_unescape(x):
  26     def replacement(m):
  27         unescapes = {
  28             "\\\\" : "\\",
  29             "\\011" : "\t",
  30             "\\012" : "\n",
  31             "\\040" : " "
  32         }
  33         return unescapes.get(m.group(0))
  34     return re.sub(r'(\\\\|\\011|\\012|\\040)', replacement, x)
  35
  36 targets = sys.argv[1:]
  37
  38 if not os.path.exists('/proc/mounts'):
  39     print('No /proc/mounts; skipping mount cleanup in', repr(targets),
  40           file=stderr)
  41     sys.exit(0)
  42
  43 exit_status = 0
  44 for target in targets:
  45     if not os.path.isdir(target):
  46         print(repr(target), 'is not a directory', file=stderr)
  47         exit_status = 1
  48         continue
  49     top = os.path.realpath(target)
  50     proc_mounts = open('/proc/mounts', 'r')
  51     for line in proc_mounts:
  52         _, point, fstype, _ = line.split(' ', 3)
  53         point = mntent_unescape(point)
  54         if top == point or os.path.commonprefix((top + '/', point)) == top + '/':
  55             if fstype.startswith('fuse'):
  56                 if subprocess.call(['fusermount', '-uz', point]) != 0:
  57                     exit_status = 1
  58             else:
  59                 if subprocess.call(['umount', '-l', point]) != 0:
  60                     exit_status = 1
  61
  62 sys.exit(exit_status)