help-version

Linux下文件工具。

#! /bin/sh
# Make sure all these programs work properly
# when invoked with --help or --version.

test "$VERBOSE" = yes && set -x

expected_failure_status_date=2
expected_failure_status_printenv=2
expected_failure_status_tty=3
expected_failure_status_sort=2

case "$all_programs" in
  *nohup*)
    if test -w /dev/full && test -c /dev/full && echo > /dev/full; then
      cat 1>&2 <<\EOF
************************************************
WARNING: On this system, the built-in echo function of /bin/sh
does not report failure when writing to a full device.
To demonstrate, run this command:

  /bin/sh -c 'echo hello > /dev/full; echo status=$?'

Notice that the failing echo leaves its exit status set to zero
and does not produce a diagnostic.

That bug in /bin/sh would cause the tests of the nohup and groups
scripts to fail, so those two are being removed from the list of
programs checked by this test.
************************************************
EOF
      all_programs=`echo $all_programs|sed 's/\<nohup\> *//;s/\<groups\> *//'`
    fi
  ;;
esac

fail=0

for lang in C fr da; do
  for i in $all_programs; do

    # false fails even when invoked with --help or --version.
    if test $i = false; then
      env LC_MESSAGES=$lang ./$i --help    >/dev/null && fail=1
      env LC_MESSAGES=$lang ./$i --version >/dev/null && fail=1
      continue
    fi

    # The just-built install executable is always named `ginstall'.
    test $i = install && i=ginstall

    # Make sure they exit successfully, under normal conditions.
    ./$i --help    >/dev/null || fail=1
    ./$i --version >/dev/null || fail=1

    # Make sure they fail upon `disk full' error.
    if test -w /dev/full && test -c /dev/full; then
      ./$i --help    >/dev/full 2>/dev/null && fail=1
      ./$i --version >/dev/full 2>/dev/null && fail=1
      status=$?
      eval "expected=\$expected_failure_status_$i"
      test x$expected = x && expected=1
      if test $status = $expected; then
	: # ok
      else
	fail=1
	echo "$i with --help and/or --version didn't fail with output" \
	  "redirected to /dev/full" 1>&2
      fi
    fi
  done
done

tmp=tmp-$$
tmp_in=in-$$
tmp_in2=in2-$$
tmp_dir=dir-$$
tmp_out=out-$$
mkdir $tmp || fail=1
cd $tmp || fail=1

comm_args="$tmp_in $tmp_in"
csplit_args="$tmp_in //"
cut_args='-f 1'
join_args="$tmp_in $tmp_in"
tr_args='a a'

chmod_args="a+x $tmp_in"
# Punt on these.
chgrp_args=--version
chown_args=--version
mkfifo_args=--version
mknod_args=--version

cmp_args="$tmp_in $tmp_in2"
diff_args="$tmp_in $tmp_in2"
sdiff_args="$tmp_in $tmp_in2"
diff3_args="$tmp_in $tmp_in2 $tmp_in2"
cp_args="$tmp_in $tmp_in2"
ln_args="$tmp_in $tmp_in2"
ginstall_args="$tmp_in $tmp_in2"
mv_args="$tmp_in $tmp_in2"
mkdir_args=$tmp_in2
rmdir_args=$tmp_dir
rm_args=$tmp_in
shred_args=$tmp_in
touch_args=$tmp_in2

basename_args=$tmp_in
dirname_args=$tmp_in
expr_args=foo

# Punt, in case GNU `id' hasn't been installed yet.
groups_args=--version

pathchk_args=$tmp_in
yes_args=--version
logname_args=--version
nohup_args=--version
printf_args=foo
seq_args=10
sleep_args=0
su_args=--version
test_args=foo
# skip chroot, stty, tty, false

for i in $all_programs; do
  # Skip these.
  case $i in chroot|stty|tty|false) continue;; esac

  rm -rf $tmp_in $tmp_in2 $tmp_dir $tmp_out
  echo > $tmp_in
  echo > $tmp_in2
  mkdir $tmp_dir
  # echo ================== $i
  eval "args=\$${i}_args"
  if ../$i $args < $tmp_in > $tmp_out; then
    : # ok
  else
    echo FAIL: $i
    fail=1
  fi
  rm -rf $tmp_in $tmp_in2 $tmp_out $tmp_dir
done

# FIXME: trap
cd ..
rm -rf $tmp

exit $fail