Temporary stdin redirect

[Ron Ueberschaer x4399]

There ought to be a way to start a program off with stdin redirected
from a file, then take over from real stdin.  Does such a capability
exist in UNIX, preferably under csh?  This would be analogous to the
>> append syntax, e.g.

	foo << start.input

would use start.input until EOF, then act normally, reading the terminal
for remaining input.

--Ron Ueberschaer
  ubi at unix.sri.com
  ...!{hplabs,rutgers}!sri-unix!ubi