/usr/share/uim/lib/srfi-55.scm is in libuim-data 1:1.8.6-15.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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;; About : SRFI-55 require-extension
;;
;; Copyright (c) 2007-2008 SigScheme Project <uim-en AT googlegroups.com>
;;
;; All rights reserved.
;;
;; Redistribution and use in source and binary forms, with or without
;; modification, are permitted provided that the following conditions
;; are met:
;;
;; 1. Redistributions of source code must retain the above copyright
;; notice, this list of conditions and the following disclaimer.
;; 2. Redistributions in binary form must reproduce the above copyright
;; notice, this list of conditions and the following disclaimer in the
;; documentation and/or other materials provided with the distribution.
;; 3. Neither the name of authors nor the names of its contributors
;; may be used to endorse or promote products derived from this software
;; without specific prior written permission.
;;
;; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
;; IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
;; THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
;; PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
;; CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
;; EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
;; PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
;; PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
;; LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
;; NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
;; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
(define %require-extension-handler-srfi
(lambda numbers
(for-each (lambda (n)
(let ((srfi-n (string-append "srfi-" (number->string n))))
(or (%%require-module srfi-n)
(%require-sysfile srfi-n))))
numbers)))
;; Be quasiquote free to allow --disable-quasiquote
(define %require-extension-alist
(list
(cons 'srfi %require-extension-handler-srfi)))
(define %require-sysfile
(lambda (ext-id)
(or (provided? ext-id)
(let* ((file (string-append ext-id ".scm"))
(path (string-append (%%system-load-path) "/" file)))
(load path)
(provide ext-id)))))
(define %require-extension
(lambda clauses
(for-each (lambda (clause)
(let* ((id (car clause))
(args (cdr clause))
(id-str (symbol->string id))
(default-handler (lambda ()
(or (%%require-module id-str)
(%require-sysfile id-str))))
(handler (cond
((assq id %require-extension-alist) => cdr)
(else
default-handler))))
(apply handler args)))
clauses)))
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