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From: gt0178a@prism.gatech.EDU (BURNS,JIM)
Newsgroups: comp.unix.shell
Subject: Re: command line prompt (need current directory)
Message-ID: <13669@hydra.gatech.EDU>
Date: 14 Sep 90 11:29:42 GMT
References: <1683@ispi.COM>
Distribution: comp
Organization: Georgia Institute of Technology
Lines: 47

in article <1683@ispi.COM>, jbayer@ispi.COM (Jonathan Bayer) says:
> I have a customer who wants/needs the prompt to show the current
> directory (similar to MS-DOS :-(  ).  I reached back into my archives
> and pulled out the following script:

In .kshrc, I do:

PS1="{${HOSTNAME}"':${PWD}}\
[!] '

In .cshrc, I do:

alias cd 'cd \!*;set prompt="`hostname``pwd`> [\\!] % "'
cd `pwd`

Putting them in the rc's executes them for each subshell. (The !'s are the
current history #'s.)

> spawned.  The new shell does not inherit the shell function.  My
> questions are:
> 
> 	1.	How can I make the new shell inherit shell functions?

Ksh allows you to export functions with (for me):

typeset -fx cp ll man

I'm not aware of any way to do it in sh, and haven't run across any csh's
that support functions, per se (not aliases).

> 	2.	Is it possible to have a shell function have the same
> 		name as a real function (ie:  name this function "cd",
> 		and have it use the normal "cd" to change the
> 		directory)?

Most shells will search for a builtin before executing an alias or
function. For a function that replaces the behavior of an external,
specify the pathname for the 'inside' invocation of the command, as in:

ll () { /bin/ls -alF $* | more ; }

This can be particularly important in shells that allow recursion!
-- 
BURNS,JIM
Georgia Institute of Technology, Box 30178, Atlanta Georgia, 30332
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