fail-diag

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 touch gives reasonable diagnostics

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

. $srcdir/../envvar-check
. $srcdir/../lang-default
PRIV_CHECK_ARG=require-non-root . $srcdir/../priv-check

pwd=`pwd`
tmp=fail-diag.$$
trap 'status=$?; cd $pwd; rm -rf $tmp && exit $status' 0
trap '(exit $?); exit' 1 2 13 15

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

d1=no-$$
dir=/$d1/such-dir
# Ensure that $d1 doesn't already exist.
ls -d $d1 2> /dev/null && framework_failure=1

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

fail=0

touch $dir > out 2>&1 && fail=1
cat <<EOF > exp
touch: cannot touch \`$dir': No such file or directory
EOF

cmp out exp || fail=1
test $fail = 1 && diff out exp 2> /dev/null

(exit $fail); exit