From: Kevin Ryde <user42@zip.com.au>
Subject: copy-file fd leak
Date: Wed, 28 Jul 2004 08:57:19 +1000 [thread overview]
Message-ID: <871xix2h4g.fsf@zip.com.au> (raw)
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* filesys.c (scm_copy_file): Avoid fd leak when destination file
cannot be opened.
(This is for 1.6 too.)
[-- Attachment #2: filesys.c.fd-leak.diff --]
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--- filesys.c.~1.127.~ 2004-07-24 09:08:47.000000000 +1000
+++ filesys.c 2004-07-24 18:55:19.000000000 +1000
@@ -1424,7 +1424,10 @@
newfd = open (SCM_STRING_CHARS (newfile), O_WRONLY | O_CREAT | O_TRUNC,
oldstat.st_mode & 07777);
if (newfd == -1)
- SCM_SYSERROR;
+ {
+ close (oldfd);
+ SCM_SYSERROR;
+ }
while ((n = read (oldfd, buf, sizeof buf)) > 0)
if (write (newfd, buf, n) != n)
[-- Attachment #3: filesys.test --]
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;;;; filesys.test --- test file system functions -*- scheme -*-
;;;;
;;;; Copyright (C) 2004 Free Software Foundation, Inc.
;;;;
;;;; 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 2.1 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
(define-module (test-suite test-filesys)
#:use-module (test-suite lib))
;;;
;;; copy-file
;;;
(with-test-prefix "copy-file"
;; return next prospective file descriptor number
(define (next-fd)
(let ((fd (dup 0)))
(close fd)
fd))
;; in guile 1.6.4 and earlier, copy-file didn't close the input fd when
;; the output could not be opened
(pass-if "fd leak when dest unwritable"
(let ((old-next (next-fd)))
(false-if-exception (copy-file "/dev/null" "no/such/dir/foo"))
(= old-next (next-fd)))))
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reply other threads:[~2004-07-27 22:57 UTC|newest]
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