i-4

实战Linux编程的原代码,希望对学驱动的人能有所帮助

#!/bin/sh
# make sure `mv -i a b' does its job with a positive response

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

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

pwd=`pwd`
tmp=mv-i4-$$
trap 'status=$?; cd $pwd; rm -rf $tmp && exit $status' 0
trap 'exit $?' 1 2 13 15

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


for i in a b; do
  echo $i > $i || framework_failure=1
done
echo y > y || framework_failure=1

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

fail=0
mv -i a b < y >/dev/null 2>&1 || fail=1

# Make sure out contains the prompt.
case "`cat b`" in
  a) ;;
  *) fail=1 ;;
esac

exit $fail