i-2

实战Linux编程的原代码,希望对学驱动的人能有所帮助

#!/bin/sh
# Test both cp and mv for their behavior with -if and -fi
# The standards (POSIX and SuS) dictate annoyingly inconsistent behavior.

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

. $srcdir/../envvar-check

# Make sure we get English translations.
. $srcdir/../lang-default

PRIV_CHECK_ARG=require-non-root . $srcdir/../priv-check

pwd=`pwd`
tmp=cp-mv-if-$$
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 c d e f g h; do
  echo $i > $i || framework_failure=1
done
chmod 0 b d f h || framework_failure=1
echo y > y || framework_failure=1

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

fail=0
mv -if a b || fail=1
mv -fi c d < y >/dev/null 2>&1 || fail=1

# Before 4.0s, this would not prompt.
cp -if e f < y > out 2>&1 || fail=1

# Make sure out contains the prompt.
case "`cat out`" in
  "cp: overwrite \`f', overriding mode 0000?"*) ;;
  *) fail=1 ;;
esac

test -f e || fail=1
test -f f || fail=1
cmp e f || fail=1

cp -fi g h < y > out 2>&1 || fail=1
test -f g || fail=1
test -f h || fail=1
cmp g h || fail=1

exit $fail