CVS: Make Repository Read Only

There are few ways to make CVS repository read only.  The most easiest so far I know of is create an empty writers file in CVSROOT folder.

Here is the initial content of CVSROOT:

# ls
checkoutlist    config,v       Emptydir   modules,v  taginfo
checkoutlist,v  cvswrappers    history    notify     taginfo,v
commitinfo      cvswrappers,v  loginfo    notify,v   val-tags
commitinfo,v    editinfo       loginfo,v  rcsinfo    verifymsg
config          editinfo,v     modules    rcsinfo,v  verifymsg,v

Create an empty writers file:

# touch writers

# ls
checkoutlist    config,v       Emptydir   modules,v  taginfo      writers,v
checkoutlist,v  cvswrappers    history    notify     taginfo,v
commitinfo      cvswrappers,v  loginfo    notify,v   val-tags
commitinfo,v    editinfo       loginfo,v  rcsinfo    verifymsg
config          editinfo,v     modules    rcsinfo,v  verifymsg,v

An empty writers means nobody may write into repository, thus the repository is read only now.