From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on starla X-Spam-Level: X-Spam-Status: No, score=0.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED,RCVD_IN_SORBS_WEB,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.6 Received: from server2.sourceware.org (server2.sourceware.org [8.43.85.97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by dcvr.yhbt.net (Postfix) with ESMTPS id EC1AD1F44D for ; Wed, 3 Apr 2024 13:55:30 +0000 (UTC) Authentication-Results: dcvr.yhbt.net; dkim=pass (2048-bit key; unprotected) header.d=case.edu header.i=@case.edu header.a=rsa-sha256 header.s=smtp-primary header.b=cVP+RPyg; dkim=pass (2048-bit key; unprotected) header.d=case.edu header.i=@case.edu header.a=rsa-sha256 header.s=g-case header.b=RuIWey1N; dkim-atps=neutral Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 9CD343845148 for ; Wed, 3 Apr 2024 13:55:29 +0000 (GMT) Received: from mpv-out-ksl-1.case.edu (mpv-out-ksl-1.CWRU.Edu [129.22.103.228]) by sourceware.org (Postfix) with ESMTPS id DE78F3846062 for ; Wed, 3 Apr 2024 13:55:02 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org DE78F3846062 Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=case.edu Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=case.edu ARC-Filter: OpenARC Filter v1.0.0 sourceware.org DE78F3846062 Authentication-Results: server2.sourceware.org; arc=none smtp.remote-ip=129.22.103.228 ARC-Seal: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1712152504; cv=none; b=E5Qs0yGliM4ptV3WPHj6MdXfMa6ScjxdRs7Bo4Bb1NC3amJPeqL7Csf2gk9gPZNsWiKkBlNK0LdlUXRqijEo51FUcRffMRvid0pN09CbnFDRi/H64DfkyfLcaNQuRH8rVX0S2GsoeuD+maN9L0ApOtN51bFvKHe+EaFfcqZVJpE= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1712152504; c=relaxed/simple; bh=GIwTHeFBrD0CWnbnjOIqodT4ooRQA+XsL4eXzjQaSB4=; h=DKIM-Signature:DKIM-Signature:Message-ID:Date:MIME-Version: Subject:To:From; b=HErX4Y48Nqgg5PGaLLDpSJqdPKaW5HIvfJz/49zVMRl7Q33IZ4/TfbnlbcsoSUh7bVyowv4AphIKIqO27uaC2IZxltmD/sV5LJ2QBAogyS5P993ig18aF85jVqwSOMD2kN7gvQTrWmRJm90Uualu/1udbaiJMZ5Kh9FovnzcZ4A= ARC-Authentication-Results: i=1; server2.sourceware.org Received: from mpv-local-ksl-1.CWRU.Edu (EHLO mpv-local-ksl-1.case.edu) ([129.22.103.235]) by mpv-out-ksl-1.case.edu (MOS 4.4.8-GA FastPath queued) with ESMTP id CCG92265; Wed, 03 Apr 2024 09:55:02 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=case.edu; s=smtp-primary; t=1712152502; bh=UA19WYrX2uSOHPOsx11NOm49h/ZCw3lzyfio/s/vefw=; l=650; h=Message-ID:Date:MIME-Version:Reply-To:Cc:Subject:To:References: From:In-Reply-To:Content-Type:Content-Transfer-Encoding; b=cVP+RPygreKZNpChMkwKUtuPoVUuSQ7Hm7thk4VTybwyjRZMHaP0KxZVMI88SNC8pr GK4n192iTIghKr97918ighoF9xoWCcPA73FxDZ/YpsUJ/12Zgi1kk9zLp9jtd2vKmGM aRVQuXeW3rTRpW3e3dzYi4lPLqtKTbQT/yw/j3gTY4G4IGN8QtRNaXUVnlrpSE6UK2v Yz1F8iWxZjA/8Ptz++nOquDLPGJlqhCNZfQ0yh7YRjvHMSl1evza67teJuuixX/NZPU PeHl6g77uWniMyhWQsU2josiG9fya1GGZo79YeffLHJ1htsieLW8o45SnUOwDwtVRXk 6T7Xz+eQ== Received: from mail-qv1-f71.google.com (EHLO mail-qv1-f71.google.com) ([209.85.219.71]) by mpv-local-ksl-1.case.edu (MOS 4.4.8-GA FastPath queued) with ESMTP id DKW84127; Wed, 03 Apr 2024 09:55:01 -0400 (EDT) Received: by mail-qv1-f71.google.com with SMTP id 6a1803df08f44-6992dd13e5fso1105016d6.2 for ; Wed, 03 Apr 2024 06:55:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=case.edu; s=g-case; t=1712152501; x=1712757301; darn=sourceware.org; h=content-transfer-encoding:in-reply-to:autocrypt:from:references:to :content-language:subject:cc:reply-to:user-agent:mime-version:date :message-id:from:to:cc:subject:date:message-id:reply-to; bh=UA19WYrX2uSOHPOsx11NOm49h/ZCw3lzyfio/s/vefw=; b=RuIWey1NnxOtAqhKv7YnNWWL+X3+G1B1flMMEc9Jp7y6IeXOo6gPKoR5CB+XTLDFV/ 8r11KRM7ugmR4C0H+RxebZtH/KHDxhmFjd/6iGrLY1PWlyO79rXMZq5lI27wfBRjuHmu NYkBNUbKGv9uFf87mkAVY6+JE7H8VGBT7+jXHGfRskb+G9YE/JwJKbqb7Z8KCC6T7q7L kzvQuqCuxavh97XSqBH+4DIeDyjelo+0S8Hk96OM513rVWfnxy+1nI+gCZlc3HjzhtH3 6FTa6+2SQvwcp6qeQ59tZZ4Yqou8Jkxn+v5Ug9UgBGVzMX/IJiBLfpkkK4tSXBYD0Fp7 W1Sw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712152501; x=1712757301; h=content-transfer-encoding:in-reply-to:autocrypt:from:references:to :content-language:subject:cc:reply-to:user-agent:mime-version:date :message-id:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=UA19WYrX2uSOHPOsx11NOm49h/ZCw3lzyfio/s/vefw=; b=XtIM2MaC7zKrvv6027MbVcctmQ7B23qvmr0MSYSxtVhQGyiMlKpX05+kglLCKJ5bkZ hKFbIdmeUcxnTLopxQ6jIU0DhC3U6IXTPjm9C/PNL4i7GwhKO91FwPZRQKooL6MFGTN/ ARHZeDhPWuxpswjJ4UFeBqDgVwbToDHwnIiR6YXmieuBRBeah4JEY6yl+OtGsWYgdoHl eqSyPkWTzBJ0gN82SMuKcUUpUlbExwyGu9Nx+sOgnSl6ivnBIGVUL08jF6wc9y1RhbGx 8XwYVR9s0critEyQDq3JrL8QSqZYPCNusrBapCHelWK0c15Seyjqu6D0+uHCRYzJbHwS AjXw== X-Forwarded-Encrypted: i=1; AJvYcCUOZ670ezJ2O/lNKLwgnwG7rX5yU/dvQqH5eb/kB6CuEnoCQxBjE4Z+0yPLbUyExcKH3JGvr2VdpfCB7Jie5r86HIEQg3gKidff X-Gm-Message-State: AOJu0Yz1m4R8+nLLddqSOredWcMcFvCSV1CsqTUrwEl09e1dfg2rSPOm MNxN/bRfzptdP8o/xWhBRubwVKN5xhXLK3wxnngXG5CCupM2boT93wVkF1cYkjHoVpHX59bUcjp Bifg8xRaMRTRgy9LbBEH38Xm+UNMNbPT0cV2hgbM8AXhhXOguKYGj6tn3JJA= X-Received: by 2002:a0c:f589:0:b0:699:293d:20b4 with SMTP id k9-20020a0cf589000000b00699293d20b4mr1256977qvm.30.1712152501014; Wed, 03 Apr 2024 06:55:01 -0700 (PDT) X-Google-Smtp-Source: AGHT+IGP2Z8OpTxlktIYfeoH6QXcOzsy/K1Hjq8OANMremmiJOsF8lM5Fb8YIcM/aL5ieozq68X/+Q== X-Received: by 2002:a0c:f589:0:b0:699:293d:20b4 with SMTP id k9-20020a0cf589000000b00699293d20b4mr1256952qvm.30.1712152500463; Wed, 03 Apr 2024 06:55:00 -0700 (PDT) Received: from [129.22.8.211] (caleb.INS.CWRU.Edu. [129.22.8.211]) by smtp.gmail.com with ESMTPSA id jp5-20020ad45f85000000b006914cd7a8b1sm6479924qvb.48.2024.04.03.06.54.59 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 03 Apr 2024 06:54:59 -0700 (PDT) Message-ID: Date: Wed, 3 Apr 2024 09:54:58 -0400 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Cc: chet.ramey@case.edu, Zachary Santer , bug-bash , libc-alpha@sourceware.org Subject: Re: Examples of concurrent coproc usage? Content-Language: en-US To: Carl Edquist References: <9831afe6-958a-fbd3-9434-05dd0c9b602a@draigBrady.com> <317fe0e2-8cf9-d4ac-ed56-e6ebcc2baa55@cs.wisc.edu> <8c490a55-598a-adf6-67c2-eb2a6099620a@cs.wisc.edu> <88a67f36-2a56-a838-f763-f55b3073bb50@lando.namek.net> <1878a356-3eb4-4818-85d9-96531bd35bc9@case.edu> From: Chet Ramey Autocrypt: addr=chet.ramey@case.edu; keydata= xsDiBEEOsGwRBACFa0A1oa71HSZLWxAx0svXzhOZNQZOzqHmSuGOG92jIpQpr8DpvgRh40Yp AwdcXb8QG1J5yGAKeevNE1zCFaA725vGSdHUyypHouV0xoWwukYO6qlyyX+2BZU+okBUqoWQ koWxiYaCSfzB2Ln7pmdys1fJhcgBKf3VjWCjd2XJTwCgoFJOwyBFJdugjfwjSoRSwDOIMf0D /iQKqlWhIO1LGpMrGX0il0/x4zj0NAcSwAk7LaPZbN4UPjn5pqGEHBlf1+xDDQCkAoZ/VqES GZragl4VqJfxBr29Ag0UDvNbUbXoxQsARdero1M8GiAIRc50hj7HXFoERwenbNDJL86GPLAQ OTGOCa4W2o29nFfFjQrsrrYHzVtyA/9oyKvTeEMJ7NA3VJdWcmn7gOu0FxEmSNhSoV1T4vP2 1Wf7f5niCCRKQLNyUy0wEApQi4tSysdz+AbgAc0b/bHYVzIf2uO2lIEZQNNt+3g2bmXgloWm W5fsm/di50Gm1l1Na63d3RZ00SeFQos6WEwLUHEB0yp6KXluXLLIZitEJM0gQ2hldCBSYW1l eSA8Y2hldC5yYW1leUBjYXNlLmVkdT7CYQQTEQIAIQIbAwYLCQgHAwIDFQIDAxYCAQIeAQIX gAUCRX3FIgIZAQAKCRC7WGnwZOp0q069AKCNDRn+zzN/AHbaynls/Lvq1kH/RQCgkLvF8bDs maUHSxSIPqzlGuKWDxbOwE0EQQ6wbxAEAJCukwDigRDPhAuI+lf+6P64lWanIFOXIndqhvU1 3cDbQ/Wt5LwPzm2QTvd7F+fcHOgZ8KOFScbDpjJaRqwIybMTcIN0B2pBLX/C10W1aY+cUrXZ gXUGVISEMmpaP9v02auToo7XXVEHC+XLO9IU7/xaU98FL69l6/K4xeNSBRM/AAMHA/wNAmRB pcyK0+VggZ5esQaIP/LyolAm2qwcmrd3dZi+g24s7yjV0EUwvRP7xHRDQFgkAo6++QbuecU/ J90lxrVnQwucZmfz9zgWDkT/MpfB/CNRSKLFjhYq2yHmHWT6vEjw9Ry/hF6Pc0oh1a62USdf aKAiim0nVxxQmPmiRvtCmcJJBBgRAgAJBQJBDrBvAhsMAAoJELtYafBk6nSr43AAn2ZZFQg8 Gs/zUzvXMt7evaFqVTzcAJ0cHtKpP1i/4H4R9+OsYeQdxxWxTQ== In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Mirapoint-Received-SPF: 209.85.219.71 mail-qv1-f71.google.com chet.ramey@case.edu 5 none X-Mirapoint-IP-Reputation: reputation=Good-1, source=Queried, refid=tid=0001.0A742F92.660D5976.0044, actions=spf tag X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A742F27.660D5FB5.001D, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0, ip=0.0.0.0, so=2016-11-06 16:00:04, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: 8b99b1dd4b0425e32cbf6768714fd8a9 X-Mirapoint-IP-Reputation: reputation=good-1, source=Fixed, refid=n/a, actions=tag X-Junkmail-Status: score=8/90, host=mpv-out-ksl-1.case.edu X-Junkmail-PrAS-Raw: score=8/90, refid=2.7.2:2023.6.26.145126:17:8.707, ip=, rules=__YOUTUBE_RCVD, DKIM_SIGNATURE, __X_GOOGLE_DKIM_SIGNATURE, __X_GM_MESSAGE_STATE, __X_GOOGLE_SMTP_SOURCE, __HAS_MSGID, __SANE_MSGID, __MSGID_HEX_844412, DATE_TZ_NA, __MIME_VERSION, __USER_AGENT, __MOZILLA_USER_AGENT, __HAS_REPLYTO, __HAS_CC_HDR, __MULTIPLE_RCPTS_CC_X2, __CC_NAME, __CC_NAME_DIFF_FROM_ACC, __SUBJ_REPLY, __BOUNCE_CHALLENGE_SUBJ, __BOUNCE_NDR_SUBJ_EXEMPT, __TO_MALFORMED_2, __TO_NAME, __TO_NAME_DIFF_FROM_ACC, __HAS_REFERENCES, __REFERENCES, __HAS_FROM, FROM_EDU_TLD, __IN_REP_TO, __CT, __CT_TEXT_PLAIN, __MIME_BOUND_CHARSET, __CTE, CTE_7BIT, __REPLYTO_SAMEAS_FROM_ADDY, __REPLYTO_SAMEAS_FROM_ACC, __FROM_DOMAIN_IN_ANY_CC2, __RCPT_DOMAIN_NOT_TO, __REPLYTO_SAMEAS_FROM_DOMAIN, __DKIM_ALIGNS_1, __DKIM_ALIGNS_2, __FUR_HEADER, __ANY_URI, __URI_MAILTO, __URI_WITH_PATH, __URI_ENDS_IN_SLASH, __URI_NO_WWW, __CP_NAME_BODY, __CP_URI_IN_BODY, [TRUNCATED], so=2010-03-03 19:42:08, dmn=2016-08-03-0138 X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: chet.ramey@case.edu Errors-To: libc-alpha-bounces+e=80x24.org@sourceware.org On 4/2/24 12:22 PM, Carl Edquist wrote: >> This seems like it would be pretty easy to fix if a coproc closed the fds >> corresponding to an existing coproc in the child after the fork > > the forked coproc has to close its fds to/from _all_ other existing coprocs > (as there can be several). And there is the issue. Without multi-coproc support, the shell only keeps track of one coproc at a time, so there's only one set of pipe file descriptors to close. -- ``The lyf so short, the craft so long to lerne.'' - Chaucer ``Ars longa, vita brevis'' - Hippocrates Chet Ramey, UTech, CWRU chet@case.edu http://tiswww.cwru.edu/~chet/