Difference in output of "cvs up" and "cvs up -p"

[Raye Raskin]

Submitter-Id: net
Originator:   rraskin@vicor.com
Organization: net
Confidential: no
Synopsis:     "cvs up -p file > foo" adds an EOF to foo, "cvs up file" does not 
add an EOF to file
Severity:     non-critical
Priority:     medium
Category:     cvs
Class:        sw-bug
Release:      1.11.17
Environment:
System: Linux sprocket.vicor.com 2.6.9-42.ELsmp #1 SMP Wed Jul 12 23:27:17 EDT 
2006 i686 i686 i386 GNU/Linux
Architecture: i686

Description:
        We have a .doc file that probably should have been -kb, but it wasn't. 
        On checkout on Linux the file is fine and there is no corruption.  A
        "cvs checkout" or "cvs update" of this file puts a file on the disk that
        is 100% correct.  However, a "cvs up -p" of this file, redirected to a
        file, inserts a final character at the end of the created file.  The
        linux utility "cmp" reports this as an "EOF".  This creates a problem
        for us due to the way we created md5 checksums -- we pipe the output of
        "cvs up -p" to md5.  Later, when the md5 sum is checked against a file
        that was checked out the "normal" way (without -p) the checksum is
        different, creating an issue.
How-To-Repeat:
        Remove any -k options for a binary file that doesn't have any cvs
        keywords.  Any cvs keywords will create a corrupted file and will spoil
        the test.  Do a checkout or update of the file.  The do a cvs up -p and
        redirect the output to a file like "cvs up -p file > foo".  Compare the
        two files.
Fix:
        Set -kb for the binary file.