/usr/share/uim/fileio.scm is in libuim-data 1:1.8.6+gh20161003.0.d63dadd-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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;;;
;;; Copyright (c) 2009-2013 uim Project https://github.com/uim/uim
;;;
;;; 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.
;;;;
(require-extension (srfi 9 48))
(require-dynlib "fileio")
(define file-bufsiz 16384)
(define file-open-flags-alist (file-open-flags?))
(define file-open-mode-alist (file-open-mode?))
(define file-position-whence-alist (file-position-whence?))
(define file-poll-flags-alist (file-poll-flags?))
(define (file-set-flag l alist)
(apply logior
(map (lambda (s)
(assq-cdr s alist))
l)))
(define (file-open-flags-number l)
(file-set-flag l file-open-flags-alist))
(define (file-open-mode-number l)
(file-set-flag l file-open-mode-alist))
(define (file-poll-flags-number l)
(file-set-flag l file-poll-flags-alist))
(define (file-position field)
(file-position-set! field 0 (assq-cdr '$SEEK_CUR file-position-whence-alist)))
(define (string->file-buf str)
(string->list str))
(define (file-buf->string buf)
(list->string buf))
(define (file-read-string s len)
(let ((ret (file-read s len)))
(if (eof-object? ret)
ret
(file-buf->string ret))))
(define (file-write-string s str)
(file-write s (string->file-buf str)))
(define (file-read-string-with-terminate-char socket term-char)
(let loop ((c (file-read socket 1))
(rest '()))
(cond ((eof-object? c)
(uim-notify-fatal (N_ "unexpected terminate string."))
"")
((eq? (car c) term-char)
(file-buf->string (reverse rest)))
(else
(loop (file-read socket 1) (cons (car c) rest))))))
(define (file-read-string-with-terminate-chars socket term-chars)
(let ((buf (file-read socket (length term-chars))))
(cond ((eof-object? buf)
(raise (N_ "unexpected terminate string.")))
((equal? term-chars buf)
"")
(else
(let loop ((c (file-read socket 1))
(buf buf)
(rest '()))
(cond ((eof-object? c)
(raise (N_ "unexpected terminate string.")))
((equal? term-chars (append (cdr buf) c))
(file-buf->string (append rest (list (car buf)))))
(else
;; enqueue
(loop (file-read socket 1)
(append (cdr buf) c)
(append rest (list (car buf)))))))))))
(define (file-read-string-with-terminate socket term-char)
(if (char? term-char)
(file-read-string-with-terminate-char socket term-char)
(file-read-string-with-terminate-chars socket term-char)))
(define-record-type file-port
(make-file-port context fd inbufsiz inbuf read write) file-port?
(context context? context!)
(fd fd? fd!)
(inbufsiz inbufsiz? inbufsiz!)
(inbuf inbuf? inbuf!)
(read read? read!)
(write write? write!))
(define (open-file-port fd)
(make-file-port fd fd file-bufsiz '() file-read file-write))
(define (close-file-port port)
(inbuf! port '())
(file-close (context? port))
(context! port #f)
(fd! port #f))
(define (call-with-open-file-port fd thunk)
(and (not (null? fd))
(< 0 fd)
(let ((ret (thunk (open-file-port fd))))
(file-close fd)
ret)))
(define (file-read-char port)
(if (null? (inbuf? port))
(begin
;; XXX: block
(file-ready? (list (fd? port)) -1)
(inbuf! port ((read? port) (context? port) (inbufsiz? port)))))
(let ((buf (inbuf? port)))
(if (or (eof-object? buf) ;; disconnect?
(not buf))
buf
(let ((c (car buf)))
(inbuf! port (cdr buf))
c))))
(define (file-peek-char port)
(if (null? (inbuf? port))
(inbuf! port ((read? port) (context? port) (inbufsiz? port))))
(let ((buf (inbuf? port)))
(if (or (eof-object? buf) ;; disconnect?
(not buf))
buf
(let ((c (car buf)))
c))))
(define (file-display str port)
((write? port) (context? port) (string->file-buf str)))
(define (file-newline port)
((write? port) (context? port) (string->file-buf (list->string '(#\newline)))))
(define (file-read-line port)
(let loop ((c (file-read-char port))
(rest '()))
(cond ((eq? #\newline c)
(list->string (reverse rest)))
((or (eof-object? c) ;; disconnect?
(not c))
(if (null? rest)
c
(list->string (reverse rest))))
(else
(loop (file-read-char port) (cons c rest))))))
(define (file-read-buffer port len)
(list->string (map (lambda (i) (file-read-char port)) (iota len))))
(define (file-get-buffer port)
(file-buf->string (inbuf? port)))
(define (file-write-sexp l port)
((write? port) (context? port) (string->file-buf (write-to-string l))))
;; XXX: multi ports are not considered
(define %*file-reading* #f)
(cond-expand
(sigscheme
(define %file-eof-error?
(lambda (err)
(and (%%error-object? err)
(string-prefix? "in read: EOF " (cadr err)))))) ;; XXX
(else
(error "cannot detect EOF error")))
(define (%file-partial-read . args)
(guard (err
((%file-eof-error? err) err))
(apply read args)))
(define file-read-sexp
(let ((p (open-input-string ""))
(buf ""))
(lambda (port)
(let ((expr (%file-partial-read p)))
(if (or (eof-object? expr)
(%file-eof-error? expr))
(let ((line (file-read-line port)))
(if (null? line) ;; disconnect?
(begin
(set! buf "")
(set! %*file-reading* #f)
expr)
(if (eof-object? line)
(if (%file-eof-error? expr)
(raise expr)
line)
(begin
(set! buf (if (%file-eof-error? expr)
(string-append buf line)
line))
(set! p (open-input-string buf))
(set! %*file-reading* #t)
(file-read-sexp port)))))
(begin
(set! buf "")
(set! %*file-reading* #f)
expr))))))
(define (duplicate-fileno oldd . args)
(let-optionals* args ((newd #f))
(duplicate2-fileno oldd newd)))
(define (file-ready? fd-list timeout)
(let* ((fds (map (lambda (fd)
(cons fd (assq-cdr '$POLLIN file-poll-flags-alist)))
fd-list))
(ret (file-poll fds timeout)))
(cond ((not ret)
(uim-notify-fatal (format "~a: '~a'" (_ "poll error") (posix-error-string)))
#f)
((null? ret)
;;(uim-notify-info (N_ "timeout"))
#f)
(else
ret))))
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