/usr/share/libctl/base/interaction.scm is in libctl3 3.1.0-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 | ; libctl: flexible Guile-based control files for scientific software
; Copyright (C) 1998-2009, Steven G. Johnson
;
; This library is free software; you can redistribute it and/or
; modify it under the terms of the GNU Lesser General Public
; License as published by the Free Software Foundation; either
; version 2 of the License, or (at your option) any later version.
;
; This library is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
; Lesser General Public License for more details.
;
; You should have received a copy of the GNU Lesser General Public
; License along with this library; if not, write to the
; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
; Boston, MA 02111-1307, USA.
;
; Steven G. Johnson can be contacted at stevenj@alum.mit.edu.
; ****************************************************************
; Utilities to make it easier to interact with the user.
(define (yes/no? question)
(print question " (y/n) ") (flush-all-ports)
(let ((input (read-line)))
(let ((c (if (string-null? input) #f (string-ref input 0))))
(cond
((or (eq? c #\y) (eq? c #\Y)) #t)
((or (eq? c #\n) (eq? c #\N)) #f)
(else (print " -- please enter y or n\n")
(yes/no? question))))))
(define (menu-choice . items)
(define (display-items index items)
(if (not (null? items))
(begin
(print " " index ". " (car items) "\n")
(display-items (+ index 1) (cdr items)))))
(define (get-choice n)
(print "Enter your selection (1.." n ") ==> ") (flush-all-ports)
(let ((input (read-line)))
(let ((choice (string->positive-integer input)))
(if (or (eq? choice #f) (< choice 1) (> choice n))
(begin
(print " -- invalid selection!\n")
(get-choice n))
choice))))
(if (null? items)
#f
(begin
(display-items 1 items)
(- (get-choice (length items)) 1))))
; ****************************************************************
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