6.9. Check For Nonprintable File

Options used:

• check_for_nonprintable FLAG lpr checks for non-printable file

• ml=minimum number of printable characters

By default lpr does not check files for for non-printable characters (i.e., escape characters) at the start of the print file. You can set the check_for_nonprintable flag to cause it to do so. The :ml value specifies the number of characters that are to be checked. Clearly, if it is 0, none will be checked.