special-1

实战Linux编程的原代码,希望对学驱动的人能有所帮助

#!/bin/sh
# verify that mkdir honors special bits in MODE

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

tmp=mkdir-sp-$$
trap 'status=$?; rm -rf $tmp && exit $status' 0
trap 'exit $?' 1 2 13 15

set_mode_string=u=rwx,g=rx,o=w,go+t
output_mode_string=drwxr-x-wT

mkdir -m$set_mode_string $tmp || fail=1

test -d $tmp || fail=1
set -- `ls -ld $tmp`
case "$1" in
  $output_mode_string) ;;
  *) fail=1 ;;
esac

rmdir $tmp || fail=1
tmp2=$tmp/sub

# This should fail.
mkdir -m$set_mode_string $tmp2 2> /dev/null && fail=1

# Now test the --parents option.
mkdir --parents -m$set_mode_string $tmp2 || fail=1

test -d $tmp2 || fail=1
set -- `ls -ld $tmp2`
case "$1" in
  $output_mode_string) ;;
  *) fail=1 ;;
esac

exit $fail