Like any other piece of software (and information generally),
cmd5checkpw comes with NO WARRANTY.

How to install:

 1. Compile the program.
       % make

 2. Install the programs and man page:
       # make install

Now you should have an example poppasswd copied to your /etc directory and
cmd5checkpw binary in your /bin directory.
Now select a free user id in your system. Create that user in /etc/passwd
do "chown thatuser /etc/poppasswd" , "chmod 400 /etc/poppasswd",
"chown thatuser /bin/cmd5checkpw" and "chmod a+s /etc/cmd5checkpw".
Of course replace "thatuser" with username of the user you have created.