X-Spam-Check-By: sourceware.org Message-ID: <45F3376B.2080507@byu.net> Date: Sat, 10 Mar 2007 15:55:39 -0700 From: Eric Blake User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.10) Gecko/20070221 Thunderbird/1.5.0.10 Mnenhy/0.7.4.666 MIME-Version: 1.0 To: cygwin@cygwin.com Subject: Re: bash process substitution "<(list)" possible bug References: <200703101514.l2AFEkOW002199@tigris.pounder.sol.net> In-Reply-To: <200703101514.l2AFEkOW002199@tigris.pounder.sol.net> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-IsSubscribed: yes Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Delivered-To: mailing list cygwin@cygwin.com -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 According to Tom Rodman on 3/10/2007 8:14 AM: > ~ $ /tmp/foo <(echo ABC) > + test -s /proc/self/fd/63 > + echo 1 > > The 'test -s "$file"' in the test run above should return 0. How do you figure? pipes are special file types, and st_size is unspecified in a stat() call on a pipe, so the -s test is unreliable in the first place. Not to mention there is an inherent race in your script (did the 'echo ABC' process run before or after the 'test -s /proc/self/fd/63' builtin of the script?). I maintain that there is no bug except in your script. - -- Don't work too hard, make some time for fun as well! Eric Blake ebb9@byu.net volunteer cygwin bash maintainer -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (Cygwin) Comment: Public key at home.comcast.net/~ericblake/eblake.gpg Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFF8zdr84KuGfSFAYARAnUYAKCW2DUrKcY5FMpz7DXTjErLE4CnNQCdEZWA xDpzpb8nzuShkWgw2GJi/Yo= =FcmH -----END PGP SIGNATURE----- -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/