Modified rcp and ls commands

The versions of rcp and ls installed on netlib1.epm.ornl.gov and netlib2.cs.utk.edu have been modified as follows:

• Both rcp and ls immediately do the following:

  
          chdir ("/netlib");
          chroot ("/netlib");
          setuid (getuid ());

  thus limiting their view of the world to everything under /netlib, and turning off any special privileges.

• The modified rcp can deal with not having an /etc/services or /etc/passwd file.

• The modified rcp has all calls to mkdir() and open(...,O_CREAT,...) #ifdef-ed out and replaced with code that prints ``Permission denied''. In general, the file receiving code is disabled, but it will talk protocol with the client rcp and return error messages. The file sending code works normally.

• rcp and ls are statically-linked binaries, since they have no access to system shared libraries.