From patchwork Wed Dec 22 18:15:40 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alejandro Colomar X-Patchwork-Id: 49199 Return-Path: X-Original-To: patchwork@sourceware.org Delivered-To: patchwork@sourceware.org Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 7D4AD3858C3A for ; Wed, 22 Dec 2021 18:16:45 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 7D4AD3858C3A DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1640197005; bh=b4OxtBi8ZX29rOXVdQhavC/nD0eh4IKYy5EF2sgHkKs=; h=To:Subject:Date:List-Id:List-Unsubscribe:List-Archive:List-Post: List-Help:List-Subscribe:From:Reply-To:Cc:From; b=JXccWS2F+X6L6emP7fbuZABGScLcoE7rg08aKVAcWhOVfB6xFHNmkiPprdLKwOUjn 1/3Wm8PlcxMMfB+np139FFnQltVK3Gns+yzrjANgHVlAhE0WNg9QCxVt52gjOIZVV0 +QksOKjX5w+sy31PdgDOl/S+9FYL/ZjwJD0BI7Og= X-Original-To: libc-alpha@sourceware.org Delivered-To: libc-alpha@sourceware.org Received: from mail-wr1-x433.google.com (mail-wr1-x433.google.com [IPv6:2a00:1450:4864:20::433]) by sourceware.org (Postfix) with ESMTPS id A51113858D35 for ; Wed, 22 Dec 2021 18:16:24 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org A51113858D35 Received: by mail-wr1-x433.google.com with SMTP id q16so6580402wrg.7 for ; Wed, 22 Dec 2021 10:16:24 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=b4OxtBi8ZX29rOXVdQhavC/nD0eh4IKYy5EF2sgHkKs=; b=K5nn30dSmjatGOyCMhx5+FFzT/Oz5pKzWFrs31jg5N/BspZhpZgRsbFWzg2Kb5M4bf IfOt54x3OuiFqQE0GE/0vV31651gfc9ctwIddroJ+tJt5sxd3oGbFrvTXZTzO3SjQDQp gFiFbzv8vZoSVHa5tErdptWzJ5yPjkqm+0/fOpemmXjrHWLPJKaEQGNNYncehdWIlWks zIcxlA/w94IUFi2MSHxulwpXPxCO4B2lRNUSCJHzJ1XJy3+OAFHXXG/+slDquErM9qp3 uiguoq1DdEHyh3U6A17h28r1LKsWUpnS62ptdtFDnzoMtQM9C7CIVsNaewDimMS/vMXQ UdrQ== X-Gm-Message-State: AOAM5334NGs6H8w8WpwuT+IhmKFBkikL9U55vF3T+R9wKNgQ9OUZ5wSu 3HX41/Nfvcah/uF9Pm1QqJ4= X-Google-Smtp-Source: ABdhPJyg+/I2MlyBvmaBqHrbJEJYD9NR8MzVhhHJx8FLFAX8/MTsczHGckBZ+zD1ZLJ1GXhPQW8igA== X-Received: by 2002:adf:bc89:: with SMTP id g9mr2779930wrh.578.1640196983707; Wed, 22 Dec 2021 10:16:23 -0800 (PST) Received: from ady1.alejandro-colomar.es ([170.253.36.171]) by smtp.googlemail.com with ESMTPSA id c13sm2487001wrt.114.2021.12.22.10.16.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 22 Dec 2021 10:16:23 -0800 (PST) To: linux-man@vger.kernel.org, Michael Kerrisk , Adhemerval Zanella Subject: [PATCH] printf.3: Document %#m as strerrorname_np(errno) Date: Wed, 22 Dec 2021 19:15:40 +0100 Message-Id: <20211222181539.3262-1-alx.manpages@gmail.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Spam-Status: No, score=-11.7 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, FREEMAIL_FROM, GIT_PATCH_0, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on server2.sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Alejandro Colomar via Libc-alpha From: Alejandro Colomar Reply-To: Alejandro Colomar Cc: Alejandro Colomar , Florian Weimer , libc-alpha@sourceware.org Errors-To: libc-alpha-bounces+patchwork=sourceware.org@sourceware.org Sender: "Libc-alpha" Reported-by: Adhemerval Zanella Signed-off-by: Alejandro Colomar Cc: libc-alpha@sourceware.org Cc: Florian Weimer Cc: Michael Kerrisk --- Hi Adhemerval and Michael, First of all, happy new solar year! :) I added documentation for "%#m". Could you confirm I got the glibc version correct, and also have a look at the changes? Thanks for the report! Cheers, Alex man3/printf.3 | 23 ++++++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-) diff --git a/man3/printf.3 b/man3/printf.3 index 4fa1f11f3..1e2bac4df 100644 --- a/man3/printf.3 +++ b/man3/printf.3 @@ -301,6 +301,17 @@ and .B G conversions, trailing zeros are not removed from the result as they would otherwise be. +For +.BR m , +if +.I errno +contains a valid error code, +the output of +.I strerrorname_np(errno) +is printed; +otherwise, the value stored in +.I errno +is printed as a decimal number. For other conversions, the result is undefined. .TP .B \&0 @@ -853,7 +864,10 @@ any flags, a field width, or a precision. .B m (Glibc extension; supported by uClibc and musl.) Print output of -.IR strerror(errno) . +.I strerror(errno) +(or +.I strerrorname_np(errno) +in the alternate form). No argument is required. .TP .B % @@ -974,6 +988,13 @@ and conversion characters \fBa\fP and \fBA\fP. .PP glibc 2.2 adds the conversion character \fBF\fP with C99 semantics, and the flag character \fBI\fP. +.PP +glibc 2.35 gives a meaning to the alternate form +.RB ( # ) +of the +.B m +conversion specifier, that is +.IR %#m . .SH NOTES Some programs imprudently rely on code such as the following .PP