row-col-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
# This script takes no arguments.

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

# Setting this envvar to a very small value used to cause e.g., `stty size'
# to generate slightly different output on certain systems.
COLUMNS=80
export COLUMNS

# Make sure there's a tty on stdin.
. $srcdir/../input-tty

# Versions of GNU stty from shellutils-1.9.2c and earlier failed
# tests #2 and #4 when run on SunOS 4.1.3.

tests='
1 rows_40_columns_80 40_80
2 rows_0_columns_0 0_0
3 rows_40_columns_80 40_80
4 rows_0 0_80
5 columns_0 0_0
6 rows_40 40_0
7 rows_0 0_0
8 columns_80 0_80
9 rows_30 30_80
NA LAST NA
'
set - $tests

saved_size=.saved-size

stty size > $saved_size \
  || { echo "$0: skipping this test: can't get window size" 1>&2;
       exit 77; exit; }

fail=0
while :; do
  test_name=$1
  args=$2
  expected_result="`echo $3|tr _ ' '`"
  test "$args" = empty && args=''
  test "x$args" = xLAST && break
  args=`echo x$args|tr _ ' '|sed 's/^x//'`
  if test "$VERBOSE" = yes; then
    # echo "testing \`stty $args; stty size\` = $expected_result ..."
    echo "test $test_name... " | tr -d '\012'
  fi
  stty $args || exit 1
  test x"`stty size 2> /dev/null`" = "x$expected_result" \
    && ok=ok || ok=FAIL fail=1
  test "$VERBOSE" = yes && echo $ok
  shift; shift; shift
done

stty `cat $saved_size|sed 's/ / columns /;s/^/rows /'` || exit 1
rm -f $saved_size

exit $fail