symlink-slash

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 that cp -dR dereferences a symlink arg if its name is
# written with a trailing slash.

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

. $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 $?); exit' 1 2 13 15

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

mkdir dir || framework_failure=1
ln -s dir symlink || framework_failure=1

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

fail=0
cp -dR symlink/ s || fail=1
set `ls -l s`

# Prior to fileutils-4.0q, the following would have output ...`s -> dir'
# because the trailing slash was removed unconditionally (now you have to
# use the new --strip-trailing-slash option) causing cp to reproduce the
# symlink.  Now, the trailing slash is interpreted by the stat library
# call and so cp ends up dereferencing the symlink and copying the directory.
test "$*" = 'total 0' && : || fail=1

(exit $fail); exit