#!/bin/sh
# make sure chgrp handles symlinks properly

if test "$VERBOSE" = yes; then
  set -x
  chgrp --version
fi

pwd=`pwd`
tmp=slink.$$
trap 'status=$?; cd $pwd; rm -rf $tmp && exit $status' 0
trap '(exit $?); exit' 1 2 13 15

framework_failure=0
mkdir $tmp || framework_failure=1
cd $tmp || framework_failure=1

if test $framework_failure = 1; then
  echo 'failure in testing framework' 1>&2
  (exit 1); exit
fi

groups=`id -nG 2>/dev/null`
case "$groups" in
  *' '*) ;;
  *) cat <<EOF 1>&2
$0: this test requires that you be a member of more than one group,
but running \`id -nG' either failed or found just one.
EOF
     (exit 77); exit
     ;;
esac

set _ $groups; shift
g1=$1
g2=$2

fail=0

touch f
ln -s f symlink

chgrp $g2 symlink 2> /dev/null
set _ `ls -l symlink`
g=$5
test "$g" = $g2 || {
  cat <<EOF 1>&2
$0: skipping this test; your system doesn't support changing
the owner or group of a symbolic link.
EOF
  (exit 77); exit
}

(
  chgrp -c $g1 f
  chgrp $g2 symlink 2> /dev/null
  # This should not change the group of f.
  chgrp -c $g2 symlink 2> /dev/null
  chgrp -c $g2 f

  # This *should* change the group of f.
  # Though note that the diagnostic is misleading in that
  # it says the `group of `symlink'' has been changed.
  chgrp --dereference -c $g1 symlink
) 2>&1 | sed "s/ $g1$/ G1/;s/ $g2$/ G2/" > actual

cat <<\EOF > expected
group of `f' changed to G2
group of `symlink' changed to G1
EOF

cmp expected actual \
  || { diff -u expected actual 1>&2; fail=1; }

(exit $fail); exit