From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-3.3 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,UNPARSEABLE_RELAY autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 11351 invoked from network); 9 Jun 2021 14:10:20 -0000 Received: from zero.zsh.org (2a02:898:31:0:48:4558:7a:7368) by inbox.vuxu.org with ESMTPUTF8; 9 Jun 2021 14:10:20 -0000 ARC-Seal: i=1; cv=none; a=rsa-sha256; d=zsh.org; s=rsa-20200801; t=1623247820; b=QxvUcZ28boX2J1zZ9ilVW9uOo5mT82g0iQpXc/JygNJCls3XfKL4tS7QwOrMuATtDmMpcH+pYp H1JltqwjM4J3wTEURwv3l9mn6aAO2kV7u/UmQFcgSSqAPmUfzvcfZbu0/q+HzGehVeSrKBldjW 9ugRz2+JkY0eR1NWSFJJMCiASMKKkUELPohjJ4LbV81VND0NX63xGPMKZtsEoN4BrLieSDWkdN 3TNu+PFk/pi94hwIQOb4Y+OWubUdDJXg2JiVy3IGbg0e5ZUSnJue/jsD7C1xSqmr8vDMZI+IOr SrKWL/uzBMmXZxCiGOgLJQ1iX2mqcw5YhlQ9r5KfjldYRQ==; ARC-Authentication-Results: i=1; zsh.org; iprev=pass (joooj.vinc17.net) smtp.remote-ip=155.133.131.76; dmarc=none header.from=vinc17.net; arc=none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed; d=zsh.org; s=rsa-20200801; t=1623247820; bh=V/pLrIj1vFBs9txBxj8xrc1Ss0KpUPxR/YfkmoSh/cg=; h=List-Archive:List-Owner:List-Post:List-Unsubscribe:List-Subscribe:List-Help: List-Id:Sender:Content-Transfer-Encoding:Content-Type:MIME-Version: Message-ID:Subject:To:From:Date:DKIM-Signature; b=tZpmYhY3A1K/moniQIgDn14/fuNCYv+v4MECxFHjKBjLjBJLzwPUQXGst8Hs/yV8YVB5Gfwq61 BukM2sZDyUsZzyO8xsO0mjJEBocI4iUv9OY4AJt9SvJFlbmUW1ech6zdMyLNGvQbbih9qfod0k 8rC7OanPjud3Cpyh9xBTnF2GbmIP13lYVms3weIM3cG9dLeScecQ3IPRBNvH+12re6fWZTodA8 OY9nHJ9xCIXe58UP9+mIrBX2q7sIMWHHxm5KRQ/cXizE0zuBen5Mkc6HUB6uUyDNyQ0qfEYqw/ 13ffZ6oTeBsSQo9xsCyOCHHvPAoYYUGvohG+zvhTpqPl7g==; DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=zsh.org; s=rsa-20200801; h=List-Archive:List-Owner:List-Post:List-Unsubscribe: List-Subscribe:List-Help:List-Id:Sender:Content-Transfer-Encoding: Content-Type:MIME-Version:Message-ID:Subject:To:From:Date:Reply-To:Cc: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References; bh=+bB3/LDmz59Tn9b+5iag2aHoWUQeKu9o5NySS3lM76g=; b=NBjWiHPJSOJYitZebLiq5AcaEG lhNty82hPw72BnxnlqDPnlJzrN5z785mCN6rxD1dW+++15C7Rfiy3yyLDbTeWklhzcls51VsrVEMR Wsyv12pF5ZaQYfOaijTkbQGFg6q9Qz7WV33MDhB87JySuTd+eoBHdNvmYgEm52Ba0MfvgJDOuVqoi pLTRHmzlRJ0Gm8InWTmMMH5+uCNwVQgbX0h8X2EOfqKXs0AilyQUYweJ/8hHn5nh0mZAeDJO2UgMy 9h8rYcquoUtwhMbVpTyACnWDLwJxBImxAvMMuQ0pEPhz8COjGQ1HTxa7rjxD45Y3CLw8o2CDfb327 qdHGRSCg==; Received: from authenticated user by zero.zsh.org with local id 1lqyuR-000NPV-Jc; Wed, 09 Jun 2021 14:10:19 +0000 Authentication-Results: zsh.org; iprev=pass (joooj.vinc17.net) smtp.remote-ip=155.133.131.76; dmarc=none header.from=vinc17.net; arc=none Received: from joooj.vinc17.net ([155.133.131.76]:43768) by zero.zsh.org with esmtps (TLS1.3:TLS_AES_256_GCM_SHA384:256) id 1lqytu-000N6t-Qx; Wed, 09 Jun 2021 14:09:47 +0000 Received: from smtp-zira.vinc17.net (128.119.75.86.rev.sfr.net [86.75.119.128]) by joooj.vinc17.net (Postfix) with ESMTPSA id B5ECBEF; Wed, 9 Jun 2021 16:09:42 +0200 (CEST) Received: by zira.vinc17.org (Postfix, from userid 1000) id 92B16C2222B; Wed, 9 Jun 2021 16:09:40 +0200 (CEST) Date: Wed, 9 Jun 2021 16:09:40 +0200 From: Vincent Lefevre To: zsh-workers@zsh.org Subject: [BUG] builtin echo doesn't check write error Message-ID: <20210609140940.GA813383@zira.vinc17.org> Mail-Followup-To: zsh-workers@zsh.org MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit X-Mailer-Info: https://www.vinc17.net/mutt/ User-Agent: Mutt/2.0.7+193 (0b2be236) vl-138283 (2021-06-07) X-Seq: 49039 Archived-At: X-Loop: zsh-workers@zsh.org Errors-To: zsh-workers-owner@zsh.org Precedence: list Precedence: bulk Sender: zsh-workers-request@zsh.org X-no-archive: yes List-Id: List-Help: List-Subscribe: List-Unsubscribe: List-Post: List-Owner: List-Archive: With zsh 5.8, the builtin echo doesn't check write error. zira% zsh -c 'echo foo >&-; echo $?' 0 In strace output: close(1) = 0 write(1, "foo\n", 4) = -1 EBADF (Bad file descriptor) No issues with an external echo command: zira% zsh -c '/bin/echo foo >&-; echo $?' /bin/echo: write error: Bad file descriptor 1 And with other shells: zira% sh -c 'echo foo >&-; echo $?' sh: 1: echo: echo: I/O error 1 zira% bash -c 'echo foo >&-; echo $?' bash: line 1: echo: write error: Bad file descriptor 1 zira% ksh -c 'echo foo >&-; echo $?' 1 zira% ksh93 -c 'echo foo >&-; echo $?' 1 zira% mksh -c 'echo foo >&-; echo $?' 1 zira% posh -c 'echo foo >&-; echo $?' 1 zira% yash -c 'echo foo >&-; echo $?' echo: cannot print to the standard output: Bad file descriptor 1 -- Vincent Lefèvre - Web: 100% accessible validated (X)HTML - Blog: Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)