(login) behaviour.

[Guangliang He]

In article <BRISTER.89May17211626 at aries.td2cad.intel.com> brister at td2cad.intel.com (James Brister) writes:
=Is this standard operating procedure for UN*X or just Ultrix 2.2?  Basically,
=when running the command ``login'' in a subshell, the username of the original
=shell gets changed when the subshell exits. I know that login replaces the
=current process, but I thought that putting it in () would get around that. Is
=``su'' the solution? T-I-A.
=
=% who am i
=andrea!brister  ttyp0   May 17 21:04    (ARIES)
=% users
=bhargav brister
=% (login)
=login: testacct
=> who am i
=andrea!testacct ttyp0   May 17 21:04
=> users
=bhargav testacct
=> exit
=logout
=% who am i
=andrea!testacct ttyp0   May 17 21:04
=% users
=bhargav testacct
=% logout
=

In csh, login is a build-in shell command. Following is I quoted from csh(1)
man page:

login
	Terminate a login shell, replacing it with an instance of 
   ^^^^^^^^^
	/bin/login. This is one way to log off, included for compati-
	bility with sh(1)

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