chkascii

Check an ASCII text file for invalid characters

chkascii is a small C program that checks files for any ASCII values that are possibly junk. The following are considered the only good ASCII values permissible in a text file: 32-126 9 10 The user can optionally force additional ASCII values to be treated as good. For good text files, chkascii will wind up by checking on proper EOL termination. If the file is not EOL-terminated, that too is reported as an error.