tests/chroot/chroot-fail.sh

   1 #!/bin/sh
   2 # Verify that internal failure in chroot gives exact status.
   3
   4 # Copyright (C) 2009-2024 Free Software Foundation, Inc.
   5
   6 # This program is free software: you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation, either version 3 of the License, or
   9 # (at your option) any later version.
  10
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
  18
  19
  20 . "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
  21 print_ver_ chroot pwd
  22
  23 # These tests verify exact status of internal failure; since none of
  24 # them actually run a command, we don't need root privileges
  25 returns_ 125 chroot || fail=1 # missing argument
  26 returns_ 125 chroot --- / true || fail=1 # unknown option
  27
  28 # chroot("/") succeeds for non-root users on some systems, but not all.
  29 if chroot / true ; then
  30   can_chroot_root=1
  31   returns_ 2 chroot / sh -c 'exit 2' || fail=1 # exit status propagation
  32   returns_ 126 chroot / .  || fail=1# invalid command
  33   returns_ 127 chroot / no_such || fail=1 # no such command
  34 else
  35   test $? = 125 || fail=1
  36   can_chroot_root=0
  37 fi
  38
  39 # Ensure that --skip-chdir fails with a non-"/" argument.
  40 cat <<\EOF > exp || framework_failure_
  41 chroot: option --skip-chdir only permitted if NEWROOT is old '/'
  42 Try 'chroot --help' for more information.
  43 EOF
  44 chroot --skip-chdir . env pwd >out 2>err && fail=1
  45 compare /dev/null out || fail=1
  46 compare exp err || fail=1
  47
  48 # Ensure we chdir("/") appropriately when NEWROOT is old "/".
  49 if test $can_chroot_root = 1; then
  50   ln -s / isroot || framework_failure_
  51   for dir in '/' '/.' '/../' isroot; do
  52     # Verify that chroot(1) succeeds and performs chdir("/")
  53     # (chroot(1) of coreutils-8.23 failed to run the latter).
  54     curdir=$(chroot "$dir" env pwd) || fail=1
  55     test "$curdir" = '/' || fail=1
  56
  57     # Test the "--skip-chdir" option.
  58     curdir=$(chroot --skip-chdir "$dir" env pwd) || fail=1
  59     test "$curdir" = '/' && fail=1
  60   done
  61 fi
  62
  63 Exit $fail