slink-2-slink

来自「实战Linux编程的原代码,希望对学驱动的人能有所帮助」· 代码 · 共 40 行

#!/bin/sh
# `test cp --update A B' where A and B are both symlinks that point
# to the same file

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

. $srcdir/../envvar-check

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

pwd=`pwd`
t0=`echo "$0"|sed 's,.*/,,'`.tmp;tmp=$t0/$$
trap 'status=$?; cd $pwd; rm -rf $t0 && exit $status' 0
trap 'exit $?' 1 2 13 15

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

touch file || framework_failure=1
ln -s file a || framework_failure=1
ln -s file b || framework_failure=1
ln -s no-such-file c || framework_failure=1
ln -s no-such-file d || framework_failure=1

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

fail=0
cp --update --no-dereference a b || fail=1
cp --update --no-dereference c d || fail=1

(exit $fail); exit