CVS Client/Server

• CVS (GNU CVS)– Open source– Cross-platform

• Designed as a client/server application• Remote access

– Client cvs: uses rsh or ssh to establish a session to the remote server,issues CVS command and request

– Server cvs: sends the results back to the requestor (client)

– Any platform• “Server”

– No CVS server daemon running on a machine dedicated as CVS server !!!

CVS Client-Server Architecture

LAVC

SCS pubs

SCS AFS

slcsun1

SCS NFS flora

NT VMS UNIX

•/afs/slac/g/cd/soft/cvs (repository)•/afs/slac/g/cd/soft/ref (reference)•/usr/local/bin/cvs

esdslx02 (Linux)/usr/local/bin/cvs

CVS “Server”• any public UNIX machines

• access to AFS or/and NFS (CVS respository , reference)• /usr/local/bin/cvs available

• slcsun1• meets such requirements• in our control (easy management, security)• memory consumption estimate needed• a dedicated CVS server

CVS Client• any machines

•Unix, VMS, NT…• CVS available

• an example• esdslx02 (linux)• /usr/local/bin/cvs

rsh or ssh

An Example

Connecting with RSH

•Enable RSH

# cat /etc/inetd.confshell stream tcp nowait root /usr/etc/tcpd /usr/sbin/in.rshd# cat .rhostsesdslx02.slac.stanford.edu jingchen

• Verify if CVS is available

# which cvs/usr/local/bin/cvs

No need to start a CVS server daemon!

• CVS repository accessible via AFS

# ls /afs/slac/g/cd/soft/slaconly/cvs

Connecting with SSH

•Disable RSH# mv .rhosts .rhosts.old

Connecting with RSH

•Verify if rsh works

# rsh -l jingchen slcsun1 'echo $PATH‘…/u/cd/jingchen/bin:/usr/local/bin:/usr/afsws/bin…

• Remote CVS via rsh

# cvs -d :ext:slcsun1:/afs/slac/g/cd/soft/slaconly/cvs checkout scriptcvs server: Updating script

Connecting with SSH

•Verify if rsh is disabled

# rsh slcsun1 lspermission denied

•Remote CVS via ssh

# setenv CVS_RSH ssh# cvs -d :ext:slcsun1:/afs/slac/g/cd/soft/slaconly/cvs checkout script

CVS Clinet : esdslx02 CVS “Server”: slcsun1

CVS Client on VMS

• Tests done: – Made SSH2 available

– Enabled RSH

• CVS server on UNIX– No particular requirement (or setup)

– access to AFS or/and NFS (CVS respository , reference) /usr/local/bin/cvs available– A test: linux (client) -> slcsun1 (server) working!!!

• Conclusion: – SSH no longer an issue!

– Server is OK!

• KenB in progress“… the VMS side will work. The AFS token is another issue. We need to set up an account, if we can, that does not have a token expiration …”

CVS Client on NT

• Test with Netbean (Greg) • A simple test

– From NT command line (DOS)

– Software: ComponentSoftware CVS for Windows

– http://www.componentsoftware.com/products/cvs/

– Setup and test