X-Recipient: archive-cygwin AT delorie DOT com DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:date:from:reply-to:reply-to:to:message-id :in-reply-to:references:subject:mime-version:content-type :content-transfer-encoding; q=dns; s=default; b=qRkJZlKE0z5wWULc TRN9qJzW5pP0S/jjxHnLHnDNyNa3MsIAU+xDVBtzvJJ9x+MXMkRdFglVvmRU6aoy vjjZVDXeMoBumrpW6+Q0PMKnpilKOVfdeY5n9buFJHEJ5udfEZlGXBb09oyF+Zwn 1vXm0EZlAWu63fKmnWinIU842Ow= DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:date:from:reply-to:reply-to:to:message-id :in-reply-to:references:subject:mime-version:content-type :content-transfer-encoding; s=default; bh=w5tdkbbpF7jBMpw5sNClHO MIPio=; b=efSakepNUAasuyRC6LYL7NtqC8uFmGkW2fDXs0RFIWpQYvACpV/+HU ubETFI91RpKoRnS14F4BDq648F+zJyKpdxXHovzPe8a8pe+cV/FpeqS9bavl8mf8 Iu/oX7r5DPTq2zk6K0MsVznp1puvP7lYYUA4mQvg9CD7bEPNn/Dn8= Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com Delivered-To: mailing list cygwin AT cygwin DOT com Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=1.0 required=5.0 tests=AWL,BAYES_50,FREEMAIL_FROM,HTML_MESSAGE,RCVD_IN_DNSWL_NONE,SPF_PASS autolearn=ham version=3.3.2 spammy=H*c:HHHHHH, HX-HELO:sk:sonic31, H*UA:x64, utm_content X-HELO: sonic314-20.consmr.mail.ne1.yahoo.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s2048; t=1534601867; bh=kYzOj1w0x2ew9aFoegQB8Suo7eE5qPXdLvF3QqtxUxA=; h=Date:From:Reply-To:To:In-Reply-To:References:Subject:From:Subject; b=Nwe2Os39/vcrdt6YDSP+/Ba26NUJ6Zwg5qufoIqIChX0NlgdH59ov8PG9uGqxv+H2lhiM6s2kUjp/+xdYkd6vVw50yJA2TZn2QEm7KbjjHfzGtS13mJghI4q3nzlPzld7zZTkHOe3q3fyZx7UagSbmgRlB8IHyNAObLOJ8l9wSkxWJwxFku00zSca5aC+P2kreMCr2KUf5moQU6WauEVNl/0XwRfi15jfrTxILGwej12rgqY71pEJhwIehlbeQCjmDrUwLpcs2zKxecwTPldzUATtZb7o4DPP+FvB7VSwnmuWVeKQ+sBE6efzHq/9aSckXob5fufjoxWm5P17Yo70A== Date: Sat, 18 Aug 2018 14:17:40 +0000 (UTC) From: "Donald Krieger via cygwin" Reply-To: Donald Krieger Reply-To: Donald Krieger To: "moss AT cs DOT umass DOT edu" , "cygwin AT cygwin DOT com" Message-ID: <625442829.188518.1534601860831@mail.yahoo.com> In-Reply-To: References: <1925552125 DOT 164706 DOT 1534595788839 DOT ref AT mail DOT yahoo DOT com> <1925552125 DOT 164706 DOT 1534595788839 AT mail DOT yahoo DOT com> Subject: Re: stdbuf does not work MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-IsSubscribed: yes Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by delorie.com id w7IEI0HK006784 Dear Eliot, Thanks for getting back so quickly.Program1 is a windows routine, xgraph. http://www.xgraph.org/ms/index.htmlThis is a general purpose plotting program which writes out text whenever an operation is performed in its graphic window. That text output is piped into Program2, a home-grown tcsh script.Program2 reads the xgraph text output one line at a time and uses it to update the display list files which xgraph is polling to keep its graphic window up to date. Here is the test harness I'm executing inside a cygwin window. For test purposes, Program2 is cat. stdbuf -oL -eL xgraph | cat -A Here's a typical output which is only seen once I've terminated xgraph by clicking the appropriate button in the graphic window. The only think I did while xgraph was running was click at one location in the graphics window; that's what generated the line: Clicked at (x,y) = (-0.62324, 0.255608) XGraph v4.38^M$Window (800 x 594)^M$0 points read.^M$^M$Error: No dimensional data was read. Cannot determine axes ranges.^M$^M$ Clicked at (x,y) = (-0.62324, 0.255608)^M$Exiting XGraph.^M$ I tried 0 (zero) instead of L in the stdbuf switches just because.I also tried using stdbuf -i0 Program2in case that might make a difference. I can easily eliminate the : stdbuf -oL -eL xgraph | tr -d "\015" | cat -AThis produces the same output but with the ^M 's removed.I don't know how to alter the windows line endings but would like to. Thanks again and for any further thoughts. Best - Don From: Eliot Moss To: cygwin AT cygwin DOT com Sent: Saturday, August 18, 2018 9:14 AM Subject: Re: stdbuf does not work On 8/18/2018 8:36 AM, Donald Krieger via cygwin wrote: > Dear list, > I require line buffered output from program1 and line buffered input to program2.The following works under Linux but not under Cygwin. stdbuf -oL -eL program 1 |& program2 > > I've searched the archive without success.I have tried -o0 -e0 -i0 and have also tried > stdbuf -oL -eL program1 |& stdbuf -i0 program2 > I have a fresh installation of cygwin as of a few months ago: uname -a yields:CYGWIN_NT-10.0 DESKTOP-S92525R 2.10.0(0.325/5/3) 2018-02-02 15:16 x86_64 Cygwin > stdbuf --version yields:stdbuf (GNU coreutils) 8.26Packaged by Cygwin (8.26-2)Copyright (C) 2016 Free Software Foundation, Inc.... Some thoughts to consider: - -i0 means unbuffered; did you write the wrong description above? - As noted in the strbuf man page, some programs don't use streams and thus are not affected by strbuf settings. I agree this is not something likely to change for the same program ported from Linux to Cygwin. - How do you have line endings set up on Cygwin or in any files you are processing? The usual Windows line ending being CR-LF instead of Linux's LF can confuse some programs. It might also help potential responders to know a little more about what program1 and program2 are. Are they Windows or Cygwin programs? Regards - EM -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple | | Virus-free. www.avast.com | -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple