#! /bin/bash
set -efu
Cmd_name=${0##*/}

if echo "$1" | grep -q -v -e '^[0-9][0-9]*$'; then
  echo ${Cmd_name}: "The first argument is not a number but \"$1\" >&2
  exit 1
fi

if test -z "${2:-}"; then
  input='-'
else
  input="$2"
fi

expand ${input} | awk \
'BEGIN { ref_length = '"$1"'; long_lines = 0;
}
length($0) > ref_length { printf "%s: line %d\tlength %d\n",'\
" \"$input\" "', FNR, length($0); long_lines++}
END {if (long_lines > 0) { exit 0; } else { exit 1; }
}'