cvs-update-filtercvs-update-filter is a compiled Lisp function in `
pcvs.el'. (cvs-update-filter PROC STRING) Filter function for PCL-CVS. This function gets the output that CVS sends to stdout. It inserts the STRING into (process-buffer PROC) but it also checks if CVS is waiting for a lock file. If so, it inserts a message cookie in the *cvs* buffer.