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Re: [Proposal] Why not add a "shell" procedure?

From: Nelson H. F. Beebe
Subject: Re: [Proposal] Why not add a "shell" procedure?
Date: Sat, 12 May 2012 08:37:23 -0600 (MDT)

Nala Ginrut <address@hidden> writes today about adding a
function to return a string from a command executed by a shell,
because (system "...") only returns the exit status of the last

The one point that I think is important is the handling of whitespace.

The Unix shells in their backquoted `cmd` and $(cmd) syntax normalize
the output of cmd to replace runs of whitespace [ \n\r\v\t]+ by single

For shell use, that is convenient.  However, inside guile, it may be
more useful to preserve the whitespace as is, and particularly the
line breaks.  

A user who wants whitespace collapsed to single spaces can easily do
so with a regexp substitution, and that could be facilitated by
providing a standard guile library function to do the job

- Nelson H. F. Beebe                    Tel: +1 801 581 5254                  -
- University of Utah                    FAX: +1 801 581 4148                  -
- Department of Mathematics, 110 LCB    Internet e-mail: address@hidden  -
- 155 S 1400 E RM 233                       address@hidden  address@hidden -
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