i-link-no

实战Linux编程的原代码,希望对学驱动的人能有所帮助

#!/bin/sh
# Show that mv doesn't preserve links to files the user has declined to move.

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

. $srcdir/../envvar-check
. $srcdir/../lang-default

pwd=`pwd`
tmp=i-link-no.$$
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
mkdir a b || framework_failure=1
echo foo > a/foo || framework_failure=1
ln a/foo a/bar || framework_failure=1
echo FUBAR > b/FUBAR || framework_failure=1
ln b/FUBAR b/bar || framework_failure=1
chmod a-w b/bar || framework_failure=1

if test $framework_failure = 1; then
  echo "$0: failure in testing framework" 1>&2
  (exit 1); exit
fi

fail=0

mv --reply=no a/bar a/foo b 2> err > out || fail=1
cat <<EOF > exp
EOF

cat <<EOF > exp_err
EOF

cmp err exp_err || fail=1
test $fail = 1 && diff err exp_err 2> /dev/null

cmp out exp || fail=1
test $fail = 1 && diff out exp 2> /dev/null

case "`cat b/foo`" in
  foo) ;;
  *) fail=1;;
esac

(exit $fail); exit