inode

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 ls -i works properly on symlinks.

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

pwd=`pwd`
t0=`echo "$0"|sed 's,.*/,,'`.tmp; tmp=$t0/$$
trap 'status=$?; cd $pwd; chmod -R u+rwx $t0; 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
touch f || framework_failure=1
ln -s f slink || framework_failure=1

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

fail=0

set x `ls -Ci f slink`; shift
test $# = 4 || fail=1
# The inode numbers should differ.
test "$1" != "$3" || fail=1

set x `ls -CLi f slink`; shift
test $# = 4 || fail=1
# With -L, they must be the same.
test "$1" = "$3" || fail=1

set x `ls -CHi f slink`; shift
test $# = 4 || fail=1
# With -H, they must be the same, too.
# Note that POSIX says -H must make ls dereference only
# symlinks (specified on the command line) to directories,
# but the historical BSD meaning of -H is to dereference
# any symlink given on the command line.  For compatibility GNU ls
# implements the BSD semantics.
test "$1" = "$3" || fail=1

(exit $fail); exit $fail