address@hidden:~/testrcs$ unzip ../rcsexample.zip
Archive:  ../rcsexample.zip
  inflating: src/In.cpp              
  inflating: src/RCS/In.cpp,v        
address@hidden:~/testrcs$ ls
src
address@hidden:~/testrcs$ cd src
address@hidden:~/testrcs/src$ ci -l In.cpp
RCS/In.cpp,v  <--  In.cpp
file is unchanged; reverting to previous revision 1.7.1.1
done
address@hidden:~/testrcs/src$ ci In.cpp
RCS/In.cpp,v  <--  In.cpp
file is unchanged; reverting to previous revision 1.7.1.1
Aborted
address@hidden:~/testrcs/src$