# -*- sh -*-

# Check environment variables for sane values while testing.

# Copyright (C) 2000-2017 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 3 of the License, 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/>.

if (FOO=FOO; unset FOO) >/dev/null 2>&1; then

  as_unset=unset

else

  as_unset=false

fi

envvar_check_fail=0

vars='

  _POSIX2_VERSION

  _STDBUF_E

  _STDBUF_I

  _STDBUF_O

  BASH_ENV

  BLOCKSIZE

  BLOCK_SIZE

  CDPATH

  COLUMNS

  DF_BLOCK_SIZE

  DU_BLOCK_SIZE

  EDITOR

  ENV

  GREP_OPTIONS

  LANGUAGE

  LS_BLOCK_SIZE

  LS_COLORS

  OMP_NUM_THREADS

  POSIXLY_CORRECT

  QUOTING_STYLE

  SIMPLE_BACKUP_SUFFIX

  TABSIZE

  TERM

  COLORTERM

  TIME_STYLE

  TMPDIR

  VERSION_CONTROL

'

for var in $vars

do

  $as_unset $var

  if eval test \"\${$var+set}\" = set; then

    echo "$0: the $var environment variable is set --" \

      ' unset it and rerun this test' >&2

    envvar_check_fail=1

  fi

done

test "$envvar_check_fail" = 1 && exit 1