#! /bin/sh
# Copyright (C) 2011-2012 Free Software Foundation, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# Sanity check for the automake testsuite.
# Check creation/removal of temporary test working directory by `./defs'.

. ./defs || Exit 1

if test x"$sh_errexit_works" != x"yes"; then
  skip_all_ "$me: no working exit trap with 'set -e'"
fi

plan_ 42

# We still need a little hack to make ./defs work outside automake's
# tree `tests' subdirectory.  Not a big deal.
sed "s|^testbuilddir=.*|testbuilddir='`pwd`'|" ../defs-static >defs-static
diff ../defs-static defs-static && fatal_ "failed to edit defs-static"
cp ../defs .

AM_TESTS_REEXEC=no; export AM_TESTS_REEXEC

if ln -s defs foo && test -h foo; then
  have_symlinks=yes
else
  have_symlinks=no
fi
export have_symlinks # Is used also by spawned shells.

dir=dummy.dir

# Don't let a failure poison all subsequent tests.
do_clean ()
{
  test -d $dir || return 0
  find $dir -type d -exec chmod u+rwx '{}' ';' || :
  rm -rf $dir
}

# Check that pre-test cleanup works also with directories with
# "null" permissions, and containing broken symlinks.
mkdir $dir $dir/sub
cd $dir
touch file sub/file
if test $have_symlinks = yes; then
  ln -s file symlink
  ln -s none brokenlink
fi
cd ..
chmod 000 $dir/sub/* $dir/file
test $have_symlinks = yes && chmod 000 $dir/symlink
chmod 000 $dir/sub $dir
command_ok_ "pre-cleanup can deal with null-perms testdir" \
            $SHELL -c  '. ./defs' dummy.test
command_ok_ "pre-cleanup removed null-perms testdir" \
            eval 'test ! -f $dir && test ! -d $dir && test ! -r $dir'

do_clean

# Check that post-test cleanup works also with directories with
# "null" permissions, and containing broken symlinks.
command_ok_ "post-cleanup can deal with null-perms testdir" \
            $SHELL -c  '
  stderr_fileno_=2
  . ./defs || Exit 1
  set -e
  mkdir dir dir/sub
  cd dir
  touch file sub/file
  if test $have_symlinks = yes; then
    ln -s file symlink
    ln -s none brokenlink
  fi
  cd ..
  chmod 000 dir/sub/* dir/file
  test $have_symlinks = yes && chmod 000 dir/symlink
  chmod 000 dir/sub dir
  :
' dummy.test
command_ok_ "post-cleanup removed null-perms testdir" \
            eval 'test ! -f $dir && test ! -d $dir && test ! -r $dir'

do_clean

# Check that pre-test cleanup does not unduly change the permissions of
# files to which symlinks in the temporary test directory point to.
if test $have_symlinks = yes; then

  mkdir dir
  chmod 000 dir
  : > file
  chmod 000 file

  mkdir $dir
  cd $dir
  ln -s ../dir ../file .
  cd ..

  command_ok_ "pre-cleanup with testdir with zero-perms symlinks" \
               $SHELL -c '. ./defs' dummy.test
  ls -l # For debugging.
  command_ok_ "pre-cleanup chmod doesn't follow symlinks to files" \
               eval 'ls -l file | grep "^----------.*file"'
  command_ok_ "pre-cleanup chmod doesn't follow symlinks to dirs" \
              eval 'ls -ld dir | grep "^d---------.*dir"'

  command_ok_ "post-cleanup with testdir with zero-perms symlinks" \
              $SHELL -c '
    ocwd=`pwd` || exit 1
    stderr_fileno_=2
    . ./defs || Exit 1
    ln -s "$ocwd/dir" "$ocwd/file" .
  ' dummy.test
  ls -l # For debugging.
  command_ok_ "post-cleanup chmod doesn't follow symlinks to files" \
               eval 'ls -l file | grep "^----------.*file"'
  command_ok_ "post-cleanup chmod doesn't follow symlinks to dirs" \
              eval 'ls -ld dir | grep "^d---------.*dir"'

  rmdir dir
  rm -f file

else # $have_symlinks = no
  skip_row_ 6 "symlinks not supported"
fi

do_clean

# Check that the cleanup trap does not remove the temporary
# test directory in case of test failure, skip, hard-error,
# or when receiving a signal.

for st in 1 2 3 10 77 99 126 127 130 255; do
  command_ok_ "exit trap doesn't clobber exit status $st" not $SHELL -c "
    stderr_fileno_=2
    . ./defs
    : > foo
    Exit $st
  " dummy.test
  command_ok_ "testdir not removed if exiting with status $st" \
              test -f dummy.dir/foo
  do_clean
done

for sig in 1 2 3 9 13 15; do
  if is_blocked_signal $sig; then
    skip_row_ 2 -r "signal $sig seems blocked"
    continue
  fi
  command_ok_ "exit trap doesn't clobber signal $sig" not $SHELL -c "
    stderr_fileno_=2
    . ./defs
    : > foo
    kill -$sig \$\$
  " dummy.test
  command_ok_ "testdir not removed if getting signal $sig" \
              test -f dummy.dir/foo
  do_clean
done

: