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From: gsg0384@uxa.cso.uiuc.edu
Newsgroups: comp.unix.questions
Subject: Which shell language should I use?
Message-ID: <113700004@uxa.cso.uiuc.edu>
Date: 26 Apr 89 05:40:00 GMT
Lines: 37
Nf-ID: #N:uxa.cso.uiuc.edu:113700004:000:1027
Nf-From: uxa.cso.uiuc.edu!gsg0384    Apr 26 00:40:00 1989



Hi,

I simply thought that I should use the C-shell script language since
I am using /bin/csh as an interactive shell.  But
I found, and was surprised, that most shell script files are Bourn-shell 
script files.  Even some of the Berkely-originated source were
wriiten in Bourn-shell language.

1. How much of the Berkeley-originated script files were written 
in Bourn-shell language?

  It seems to me that such practice enhances
portability.  I'd like to hear some opinion on which shell-sript
language is preferable for what purpose.

2. I found that the first line of a shell-script file is special
   even though it contains '#'.  Sometimes I found, and sometimes not,

#!/bin/csh

  or

#!/bin/sh

   in the first line.  They looks like directives.  Am I right?

3.  Where in the UNIX manual can I find some kind of rule on which
   shell-script parser is applied for a certain shell-script file?

4. Please recommend a book on shell programming.

Thanks a lot.

             Hugh
             gsg0384@uxa.cso.uiuc.edu