From unknown Fri Jun 13 11:08:40 2025 X-Loop: help-debbugs@gnu.org Subject: bug#28469: xargs arguments are not passed to grep Resent-From: Sergiu Bordei Original-Sender: "Debbugs-submit" Resent-CC: bug-grep@gnu.org Resent-Date: Fri, 15 Sep 2017 15:39:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: report 28469 X-GNU-PR-Package: grep X-GNU-PR-Keywords: To: 28469@debbugs.gnu.org X-Debbugs-Original-To: bug-grep@gnu.org Received: via spool by submit@debbugs.gnu.org id=B.150548988424067 (code B ref -1); Fri, 15 Sep 2017 15:39:02 +0000 Received: (at submit) by debbugs.gnu.org; 15 Sep 2017 15:38:04 +0000 Received: from localhost ([127.0.0.1]:43024 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dssgt-0006G0-Ki for submit@debbugs.gnu.org; Fri, 15 Sep 2017 11:38:03 -0400 Received: from eggs.gnu.org ([208.118.235.92]:41396) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dsnE6-0002hW-Fu for submit@debbugs.gnu.org; Fri, 15 Sep 2017 05:47:58 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dsnE0-0001ie-Ch for submit@debbugs.gnu.org; Fri, 15 Sep 2017 05:47:53 -0400 X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on eggs.gnu.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM, HTML_MESSAGE,T_DKIM_INVALID autolearn=disabled version=3.3.2 Received: from lists.gnu.org ([2001:4830:134:3::11]:59688) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dsnE0-0001iS-8r for submit@debbugs.gnu.org; Fri, 15 Sep 2017 05:47:52 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:60589) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dsnDy-0002yq-VF for bug-grep@gnu.org; Fri, 15 Sep 2017 05:47:51 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dsnDy-0001hf-31 for bug-grep@gnu.org; Fri, 15 Sep 2017 05:47:51 -0400 Received: from mail-wm0-x22e.google.com ([2a00:1450:400c:c09::22e]:43903) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1dsnDx-0001gn-Tc for bug-grep@gnu.org; Fri, 15 Sep 2017 05:47:50 -0400 Received: by mail-wm0-x22e.google.com with SMTP id a137so1964754wma.0 for ; Fri, 15 Sep 2017 02:47:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=Mjt8sOQvm+aCuR7R6UICqeMg0IBSzc+AYdOPaaK4oAE=; b=oYhd+/X4crGKOzqSEyUcsboCXV41KRU70Gi3OixhVgo3nTC/u2u3OOYZAz5CM/2V/5 YhLSo4d0hVsH0A4PXS/X4c37ZM6+rKSStyRZB7cu0FzEYtNNEMxMS2jCQH+3nlrEUs7J ijeem1IJVeIv5mlDYOF40KO00BWKedXDjimz4YaTlK8OfKiqzKEohV1HRcHQjVQthJwR 4FxUJmKlPdTlgqmtkNzn3nCjgcrbhDjNQeoGOCXcqOQMwBbkA3dMMHK7XYiAdHswD19q 6eeVdey8lhSAiH9GZPHeyW4pCxG2lY6paBNPCUzJsVplR2RHuQ8zVKZt5HJVKWVyFa1a 4OqQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=Mjt8sOQvm+aCuR7R6UICqeMg0IBSzc+AYdOPaaK4oAE=; b=idXq0DmGxLQimCmJD1+FHkwX29d7gQZ3j9FEvCSV5e/PXDF0og//0hq6gDkMlnF9vc 8ffqQseZyKcdzIpjYlJB2KegYLC+DfZdcfoT4yZip1s8fpS9RWhKe/4vk8AQ33RCV1/i E0ndiGaf3JGvOaKrYAUUEv5zkLPdi5QWXL2vCz/qMY9u/vVYSmR6+IgJNp2SI6ptQu+e 1bNHo0x/B734dgYvGeN+dDGGgPNuDCmoyquTPRU3XmWlQeG2drctGFMNpWhnOwZ7UNjm OsOcX2yJpNIvAkfG72B/fclVSKrCMag/Q0nWf2u39RCInAKVbL2aHVNsurjtriI+4UIY fa8g== X-Gm-Message-State: AHPjjUi66LYPGNYvUEnbZ5CosNPrSlvpAhpTrpBcsaDgqppyTXmes1E3 fwkA/L7VLcNK+M57F9rgN1nBDxxWb1fbNPuHAMAlog== X-Google-Smtp-Source: ADKCNb4VsinqXlSnGpYLN+d/uZmNbMEhqXn2rnm5YnCjUKKYrtjJVDXLZjWTkuM7rIClGSw5w/NPGkBHIO2DeKIBuTg= X-Received: by 10.80.213.211 with SMTP id g19mr16472705edj.277.1505468867183; Fri, 15 Sep 2017 02:47:47 -0700 (PDT) MIME-Version: 1.0 Received: by 10.80.159.168 with HTTP; Fri, 15 Sep 2017 02:47:46 -0700 (PDT) From: Sergiu Bordei Date: Fri, 15 Sep 2017 11:47:46 +0200 Message-ID: Content-Type: multipart/alternative; boundary="94eb2c1af5100c89f405593749af" X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-Received-From: 2001:4830:134:3::11 X-Spam-Score: -4.0 (----) X-Mailman-Approved-At: Fri, 15 Sep 2017 11:38:00 -0400 X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -4.0 (----) --94eb2c1af5100c89f405593749af Content-Type: text/plain; charset="UTF-8" Hello, please find an error detected when is used a combination of "xargs" and "grep", arguments {} are not substituted in grep construction: expected results: echo "inga"|grep -c "i" 1 user@box1:~$ a="i"; echo `echo "inga"|grep -c $a` 1 but was necessary tu use it in combination with xargs: user@box1:~$ echo "i" | xargs -I{} echo $(echo {} ;a=$(echo {}) ; echo $a ; echo "inga"|grep -c $a) i i 0 user@box1:~$ echo "i" | xargs -I{} echo $(echo {} ;a=`echo {}` ; echo $a ; echo "inga"|grep -c $a) i i 0 user@box1:~$ echo "i" | xargs -I{} echo $(echo {} ;a={} ; echo $a ; echo "inga"|grep -c $a) i i 0 user@box1:~$ echo "i" | xargs -I{} echo `echo {} ;a={} ; echo $a ; echo "inga"|grep -c $a` i i 0 user@box1:~$ echo "i" | xargs -I{} echo `echo {} ;a={} ; echo $a ; echo "inga"|grep -c $a` i i 0 user@box1:~$ echo "i" | xargs -I{} echo `echo {} ;a={} ; echo $a ; echo "inga"|grep -c $a` i i 0 Thanks, Sergiu Bordei --94eb2c1af5100c89f405593749af Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hello,

please find an error detecte= d when is used a combination of "xargs" and "grep", arg= uments {} are not substituted in grep construction:
expected resul= ts:
echo "inga"|grep -c "i"
1
user@box1:~= $ a=3D"i"; echo `echo "inga"|grep -c $a`
1
=

but was necessary tu use it in combination with xargs:<= br>

user@box1:~$ echo "i" | xargs -I{} echo $(echo = {} ;a=3D$(echo {}) ; echo $a ; echo "inga"|grep -c $a)
i i 0user@box1:~$ echo "i" | xargs -I{} echo $(echo {} ;a=3D`echo {}= ` ; echo $a ; echo "inga"|grep -c $a)
i i 0
user@box1:~$ ec= ho "i" | xargs -I{} echo $(echo {} ;a=3D{} ; echo $a ; echo "= ;inga"|grep -c $a)
i i 0
user@box1:~$ echo "i" | xargs= =C2=A0 -I{} echo `echo {} ;a=3D{} ; echo $a ; echo "inga"|grep -c= $a`
i i 0
user@box1:~$ echo "i" | xargs -I{} echo `echo {}= ;a=3D{} ; echo $a ; echo "inga"|grep -c $a`
i i 0
user@box= 1:~$ echo "i" | xargs -I{} echo `echo {} ;a=3D{} ; echo $a ; echo= "inga"|grep -c $a`
i i 0


Thanks,
Sergiu Bordei
--94eb2c1af5100c89f405593749af-- From unknown Fri Jun 13 11:08:40 2025 X-Loop: help-debbugs@gnu.org Subject: bug#28469: xargs arguments are not passed to grep Resent-From: Paul Jackson Original-Sender: "Debbugs-submit" Resent-CC: bug-grep@gnu.org Resent-Date: Fri, 15 Sep 2017 16:35:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 28469 X-GNU-PR-Package: grep X-GNU-PR-Keywords: To: 28469@debbugs.gnu.org, sergiu.bordei@gmail.com X-Debbugs-Original-To: bug-grep@gnu.org, sergiu.bordei@gmail.com Received: via spool by submit@debbugs.gnu.org id=B.150549327929152 (code B ref -1); Fri, 15 Sep 2017 16:35:02 +0000 Received: (at submit) by debbugs.gnu.org; 15 Sep 2017 16:34:39 +0000 Received: from localhost ([127.0.0.1]:43067 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dstZf-0007a8-8V for submit@debbugs.gnu.org; Fri, 15 Sep 2017 12:34:39 -0400 Received: from eggs.gnu.org ([208.118.235.92]:51555) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dstZe-0007Zv-3r for submit@debbugs.gnu.org; Fri, 15 Sep 2017 12:34:38 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dstZX-0004Zy-VC for submit@debbugs.gnu.org; Fri, 15 Sep 2017 12:34:32 -0400 X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on eggs.gnu.org X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=BAYES_40,T_DKIM_INVALID, URIBL_BLOCKED autolearn=disabled version=3.3.2 Received: from lists.gnu.org ([2001:4830:134:3::11]:37859) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dstZX-0004Zu-SG for submit@debbugs.gnu.org; Fri, 15 Sep 2017 12:34:31 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:42516) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dstZW-0002xA-PV for bug-grep@gnu.org; Fri, 15 Sep 2017 12:34:31 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dstZU-0004Yg-6f for bug-grep@gnu.org; Fri, 15 Sep 2017 12:34:30 -0400 Received: from out4-smtp.messagingengine.com ([66.111.4.28]:38207) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dstZU-0004YG-0a for bug-grep@gnu.org; Fri, 15 Sep 2017 12:34:28 -0400 Received: from compute1.internal (compute1.nyi.internal [10.202.2.41]) by mailout.nyi.internal (Postfix) with ESMTP id B24EB20C79; Fri, 15 Sep 2017 12:34:26 -0400 (EDT) Received: from web2 ([10.202.2.212]) by compute1.internal (MEProxy); Fri, 15 Sep 2017 12:34:26 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=content-transfer-encoding:content-type :date:from:in-reply-to:message-id:mime-version:references :subject:to:x-me-sender:x-me-sender:x-sasl-enc; s=fm1; bh=iOGB7L egrIjfkUakRWbJ3aMarthAn/vUKRngwh9lyms=; b=bcS6L5zmzFCDbAn2b/jvLs x5701E+XxZr6B8VkeVju/77tGL8ZxgVhYlJjsDa15fB5im/BFzfwIN4F5kxphGWF OhWIU4gu61osuGfz1xMTF1j1BsvhMth3m22VXpNZAH3p5wtVF61Zo6e1qZAcBW67 E92SZglwXP0YAhbnRfvlkAQibQDw0Se38RpKPmse2e0LFju2tQEpc0sQ1uqk58Xw 5YNt4J94rWldCkYLXEvCO1zib2wo/Vbf0dRJuqXsAvlJTN2Kan45cRhVZ1JZA2Kw tMUMv3oMJ2OZ/3bhKab2lQEMjkgKobbOLk/ljFAsTYSRQZ/ku+aJOlKwgmJf2UCw == X-ME-Sender: Received: by mailuser.nyi.internal (Postfix, from userid 99) id 6BBB26264D; Fri, 15 Sep 2017 12:34:26 -0400 (EDT) Message-Id: <1505493266.301725.1107434376.75200589@webmail.messagingengine.com> From: Paul Jackson MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="utf-8" X-Mailer: MessagingEngine.com Webmail Interface - ajax-64b08692 References: In-Reply-To: Date: Fri, 15 Sep 2017 11:34:26 -0500 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-Received-From: 2001:4830:134:3::11 X-Spam-Score: -4.4 (----) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -4.4 (----) Sergiu wrote: >> please find an error detected when is used a combination of "xargs" and >> "grep", arguments {} are not substituted in grep construction: I believe that all your examples, both expected (count of "1" resulting) and apparently unexpected (outputs of "i i 0") are working as expected. I am guessing (am I right?) that you were expecting outputs of "i i 1" or some such from your last six more complex examples using xargs, however that "echo inga | grep -c $a" is working on an $a value that is still inside the $( ... ) or ` ... ` command substitution, and thus equal to '{}', with $a not yet set to "i" by the final execution of the xargs invocation of the output from that command substitution. -- Paul Jackson pj@usa.net From debbugs-submit-bounces@debbugs.gnu.org Tue Dec 31 14:49:35 2019 Received: (at control) by debbugs.gnu.org; 31 Dec 2019 19:49:35 +0000 Received: from localhost ([127.0.0.1]:35186 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1imNWJ-0003iW-1v for submit@debbugs.gnu.org; Tue, 31 Dec 2019 14:49:35 -0500 Received: from zimbra.cs.ucla.edu ([131.179.128.68]:41724) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1imNWH-0003iH-Cb for control@debbugs.gnu.org; Tue, 31 Dec 2019 14:49:33 -0500 Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 055DE16027C for ; Tue, 31 Dec 2019 11:49:28 -0800 (PST) Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id SBUlRVKWvXb9 for ; Tue, 31 Dec 2019 11:49:27 -0800 (PST) Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 6BA0816027E for ; Tue, 31 Dec 2019 11:49:27 -0800 (PST) X-Virus-Scanned: amavisd-new at zimbra.cs.ucla.edu Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id eV3IMWQtRwsI for ; Tue, 31 Dec 2019 11:49:27 -0800 (PST) Received: from [192.168.1.9] (cpe-23-242-74-103.socal.res.rr.com [23.242.74.103]) by zimbra.cs.ucla.edu (Postfix) with ESMTPSA id 4A7F716027C for ; Tue, 31 Dec 2019 11:49:27 -0800 (PST) To: control@debbugs.gnu.org From: Paul Eggert Subject: 28469 is not a bug Organization: UCLA Computer Science Department Message-ID: <7f45bce9-7839-bcf6-27e8-57a502887022@cs.ucla.edu> Date: Tue, 31 Dec 2019 11:49:27 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.2 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: control X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) tags 28469 notabug close 28469