printf-hex

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 only two hex. digits are consumed in a \xHHH sequence

prog=`pwd`/../../src/printf

if test "$VERBOSE" = yes; then
  set -x
  $prog --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

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

fail=0

$prog '\xf73\n' > out || fail=1
cat <<\EOF > exp