#! /bin/sh
# Demonstrate how mv fails when it tries to move a directory into itself.

: ${MV=mv}
: ${MKDIR=mkdir}
: ${RM=rm}
: ${TOUCH=touch}

dir=into-self-dir
file=into-self-file

test_failure=0

$RM -rf $dir $file || test_failure=1
$MKDIR -p $dir/a/b || test_failure=1
$TOUCH $file || test_failure=1

if test $test_failure = 1; then
  echo 'failure in testing framework'
  exit 1
fi

fail=0

# Make sure we get English translations.
LANGUAGE=C
export LANGUAGE
LC_ALL=C
export LC_ALL
LANG=C
export LANG

# This mv command should fail.
$MV $dir $file $dir > out 2>&1 && fail=1

sed \
   -e "s,$MV:,XXX:," \
   -e "s,$dir,SRC," \
   -e "s,$dir/$dir,DEST," \
  out > out2

cat > exp <<\EOF
XXX: cannot move `SRC' to a subdirectory of itself, `DEST'
EOF

cmp out2 exp || fail=1

# Make sure the file is gone.
test -f $file && fail=1
# Make sure the directory is *not* moved.
test -d $dir || fail=1
test -d $dir/$dir && fail=1
# Make sure the file has been moved to the right place.
test -f $dir/$file || fail=1
$RM -rf $dir $file out out2 exp

exit $fail