Path: utzoo!attcan!uunet!tut.cis.ohio-state.edu!rutgers!cmcl2!phri!marob!daveh
From: daveh@marob.masa.com (Dave Hammond)
Newsgroups: comp.unix.xenix.sco
Subject: Re: Problems with guest login script
Message-ID: <27186F89.40D6@marob.masa.com>
Date: 14 Oct 90 14:00:40 GMT
Organization: ESCC, New York City
Lines: 20

hb@vpnet.chi.il.us (hank barta) writes:

>> 	# .profile
>> 	exec new_user.sh
>Since the script is not directly executable but must be interpreted
>by a shell, is there some way the user can get back to the shell itself?

No.  The shell does this by doing an exec{l,v} without first forking to
create a new child process.  This overlays the parent process (be it a
shell or any other program) with the new process, rather than creating a
subprocess.

The shell probably invokes another sh and passes it `-c new_user.sh',
although it might avoid the exec{l,v} by special-casing scripts and
internally simulating the above action.

--
Dave Hammond
daveh@marob.masa.com
uunet!masa.com!marob!daveh