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