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 autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 29438 invoked from network); 15 Mar 2023 03:46:34 -0000 Received: from zero.zsh.org (2a02:898:31:0:48:4558:7a:7368) by inbox.vuxu.org with ESMTPUTF8; 15 Mar 2023 03:46:34 -0000 ARC-Seal: i=1; cv=none; a=rsa-sha256; d=zsh.org; s=rsa-20210803; t=1678851994; b=WqDRzturnuIx7SYFStDeX3/SzLbMz0bmlSmSNuXyBiuIBoBckP+/oIDuzmYL4FY5iq410j6YzX P2I5jOw0odLBsKYnBSR5lmRdatUCBS86esVdDNHLOQJIiqSJWT7xA+XXcYh7uAipuocFJGe+6a XO8sjUATZFHFzLw8kDU8lhJGWEL8UI0PyXi7eQRGD9jNufG7vanN2B7UyvtrzVikrquDjkt8ce x3PhX/ZhfKp0Npv8Y/NxnAtsXOCZ+lmxGrU6RACbSmwXNDrPt/SJ3opyf6B8MdNcd0/o3PHVZP scQmupixV4ZdhjkvNyVb1rkmFsojCgzbKnwj7p1vN7rtzg==; ARC-Authentication-Results: i=1; zsh.org; iprev=pass (mail-ed1-f49.google.com) smtp.remote-ip=209.85.208.49; dkim=pass header.d=brasslantern-com.20210112.gappssmtp.com header.s=20210112 header.a=rsa-sha256; dmarc=none header.from=brasslantern.com; arc=none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed; d=zsh.org; s=rsa-20210803; t=1678851994; bh=6m6XD35B1v33R0TUbhU2LotDPCTFmhQXHTqW6RRKVlg=; h=List-Archive:List-Owner:List-Post:List-Unsubscribe:List-Subscribe:List-Help: List-Id:Sender:Content-Transfer-Encoding:Content-Type:Cc:To:Subject: Message-ID:Date:From:In-Reply-To:References:MIME-Version:DKIM-Signature: DKIM-Signature; b=jnauqIOnSoduhGyziFR1RN7HHdmtttjC4dCoEFt6Phk2iXR3/3XnHLflh1hu6+TKMc3AsjtlCr 3uSXWg3dw0Tdu7YAzBIABKqRlpro8PxLcpd4M/aOaLZxlkglOJR+IB5/n7it4i9YG12R9NsPRL ODgrtKPoiu6SPfrHTIiFLP3kOHpjHypEIId315AodPx6lqHax7mczQI0YRnlP2f3dxIerL36Nr Arjv/UHb8Znww4BCZFbG63JBXmff8vmqpcBeuRuMm8XmFum7piTtQu/zTC1BtnDqSh03sgkblj k9AflkgE6yCN4bpnYW7vaqhqQVA+FRY9+ZCjAZCouErBzg==; DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=zsh.org; s=rsa-20210803; h=List-Archive:List-Owner:List-Post:List-Unsubscribe: List-Subscribe:List-Help:List-Id:Sender:Content-Transfer-Encoding: Content-Type:Cc:To:Subject:Message-ID:Date:From:In-Reply-To:References: MIME-Version:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID; bh=ubOU1GWzGEohVkqrSYZpBEvvKELqZNOxNV6qMRsEcaw=; b=qQA13SaySxpZRUeYRbZeIYM+yi 9BcalPoZ8B1381NyNiDs/UCHfJox7Em4W7jiPw4M6n8eFKahKWEhJxucYzRd+kdX1yQhgFWmxBlr6 sPQ1zFWlNhPv3yySpCQCpG4963m8NNPPAKqMgc2gCWM/G7ob/SJQKBVx42JvPg7xlfWmYlBbDV0Ds USnunGmCzWyeItVCTNpyR4xanKjFO6bn+x+eszmROBdLpQikj91r2GKG3kbTLbBrQjK7zRBac1iGy ADcTdIhbhc/stcvmwr9lrOYVMwhDoX7CFtOKMlmOjWDrI6C20lkQgGUEKyyL3BKZj6Qzh3+NAGJP9 JMz/8OHw==; Received: by zero.zsh.org with local id 1pcI5x-000COp-M4; Wed, 15 Mar 2023 03:46:33 +0000 Authentication-Results: zsh.org; iprev=pass (mail-ed1-f49.google.com) smtp.remote-ip=209.85.208.49; dkim=pass header.d=brasslantern-com.20210112.gappssmtp.com header.s=20210112 header.a=rsa-sha256; dmarc=none header.from=brasslantern.com; arc=none Received: from mail-ed1-f49.google.com ([209.85.208.49]:39637) by zero.zsh.org with esmtps (TLS1.3:TLS_AES_128_GCM_SHA256:128) id 1pcI5e-000C5v-Ia; Wed, 15 Mar 2023 03:46:16 +0000 Received: by mail-ed1-f49.google.com with SMTP id ek18so39206522edb.6 for ; Tue, 14 Mar 2023 20:46:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=brasslantern-com.20210112.gappssmtp.com; s=20210112; t=1678851973; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=ubOU1GWzGEohVkqrSYZpBEvvKELqZNOxNV6qMRsEcaw=; b=q5HlF68SLuac9qibAMyExJ56UdTHlMWA+hd+J1/S5jTlj2NckAHUIA7D2gVzRfqdVD vgmlsm5AeTWUgIkaGbHKR9f1Dmi9fYmDwGyiEl2eU3xs9IjCb6Etw6nStFU4ZjCV2sUu VaFeKJkI2/uz2f77XWIK23sYVVoyJx2d4l+XBacsSe2OtVQiXEmGlgdqkZjIbg0yEiMj +O4g5TYMFnB4yXh47eXvTufhVOlRZWLSz4mU0sq91LUuDN9twEhXZI3wf3KgJR2n06L3 ftJs7u9vLwHY+QoPQhBZc31h1g2CyVsVNvDxxLlMjFdlyrt5BsFo72a5SKV6o2Nh7Nng zI8w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1678851973; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=ubOU1GWzGEohVkqrSYZpBEvvKELqZNOxNV6qMRsEcaw=; b=FfBHYHwvZZi3Z1lND4BesWub4BxiWtwDwt0rEwHXoUTV5E+mpNSVtODlCi9UntYL0l jl/uXmy0s+N2/CczY8Dm329Od1ZZooknsNiDmmnVyVBDuGWufsRczo8u6+g4sQep2IyC FDJTPjknc4U5lMyQI5/xsyNrhZwOPFkr9TzlzOgUDkd3T7+Wx6psR7eIZffd6vf/Dlg5 FjDdYNReDWTkv1TMHlHA5EGEqEx86VS6rE0x2pL3w7FYKSu+uI4ygj0NFg4h0J1yFh37 UUaMXYcnMY1K7Rxi39k/MTc+hC9OHwlb3hugRdoT1yAMnBGcz4Erc9CLoJOVdzoU5TGy MAdA== X-Gm-Message-State: AO0yUKU+ewk1jTG5K87+j7mW5ZakD9Fz3jtWTcuHuwYvdDesxU1E9Rdk wwpPz9TwYezI+OnrcGv/8rn1QWLapn1dwtN+V6ERjg== X-Google-Smtp-Source: AK7set//jeyAJbGcrsMrRPmkHK865IaJS7c1Wc8pH8IvuSf/xX/hyZple388/9G8jXIeQm0+j8jsN/VvNmeTniQ3RCM= X-Received: by 2002:a17:906:58c6:b0:921:f72f:fde7 with SMTP id e6-20020a17090658c600b00921f72ffde7mr2546257ejs.12.1678851973411; Tue, 14 Mar 2023 20:46:13 -0700 (PDT) MIME-Version: 1.0 References: <1621619253.265114.1678847919086.ref@mail.yahoo.com> <1621619253.265114.1678847919086@mail.yahoo.com> In-Reply-To: <1621619253.265114.1678847919086@mail.yahoo.com> From: Bart Schaefer Date: Tue, 14 Mar 2023 20:46:02 -0700 Message-ID: Subject: Re: bug report : printf %.1s outputting more than 1 character To: "Jason C. Kwan" Cc: "zsh-workers@zsh.org" Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Seq: 51577 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: On Tue, Mar 14, 2023 at 7:40=E2=80=AFPM Jason C. Kwan wrote: > > I'm using the macOS 13.2.1 OS-provided zsh, version 5.8.1, which I unders= tand isn't the latest and greatest of 5.9, so perhaps this bug has already = been addressed. A related case been addressed by declaring it an intentional divergence from POSIX, see https://www.zsh.org/mla/workers/2022/msg00240.html However ... > In the 4-byte sequence as seen below ( defined via explicit octal codes )= , under no Unicode scenario should 4 bytes be printed out via a command of = printf %.1s, by design. > > - The first byte of \377 \xFF is explicitly invalid under UTF-8 (even al= lowing up to 7-byte in the oldest of definitions). This triggers a branch of the printf code introduced by this comment: /* * Invalid/incomplete character at this * point. Assume all the rest are a * single byte. That's about the best we * can do. */ Thus, you've deliberately invoked a case where zsh's response to invalid input is to punt. This dates back to the original implementation in workers/23098, https://www.zsh.org/mla/workers/2007/msg00019.html, January 2007.