From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pl1-x632.google.com (mail-pl1-x632.google.com [IPv6:2607:f8b0:4864:20::632]) by sourceware.org (Postfix) with ESMTPS id DA2B03858D32 for ; Sun, 12 Mar 2023 22:55:10 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org DA2B03858D32 Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=gmail.com Received: by mail-pl1-x632.google.com with SMTP id i3so11005433plg.6 for ; Sun, 12 Mar 2023 15:55:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; t=1678661710; h=content-transfer-encoding:in-reply-to:from:references:to :content-language:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=UgtSXcdfyU8rI8W9+6Jk2CBajYIz07XgY8mEKmFbi94=; b=TpUCzMKfe7zqDGfXmubRTrMgBlOAfRdd3UKNxH0f7cXs7CIHTWZDbs1PQa288Q2bRm 4FPmI+WlnT2OapNspiBqDsRpFZdhG3bxHFZtWpGLoHc5zkgYymuaeFmXR6mZKmuvliCX Np3c2YLLY+xlr5CEhOjShIojWZii59OJANfyWwwbYbOjTB4XIKyTUxP9fvxTB1MtOr46 tyIuBnJFaJGQcFpuohon7IEwOUFp/4WHRwVdQlPI8UGxVj7lTMUxI04kYToB+wPRCRdH ysyzcZUtQxb2VUsuBHGIyH/sG9vAR+ReAXFndaBFTf1BCX6B9DMZuKiD3nR4LKxOVo6T +MeA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1678661710; h=content-transfer-encoding:in-reply-to:from:references:to :content-language:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=UgtSXcdfyU8rI8W9+6Jk2CBajYIz07XgY8mEKmFbi94=; b=5NDKkZdIM+/NPucG1NXzYIkYNb62C7e7KE5I2zTDFKrnc4jrMKqYZwSzNadq9m6GvG YxTQrzVbdPHdhJYKdYhj4Ku61dpOmdMJYCXXrXF1I6bwnFtE/UpcfNlN2l/fB4lmAUdq h5RQwvmOoNOv4eYp9FzjtMH9xI/7o51hiX4nPCGwMJyUuf4Z5icMLhtF7Ry+UvYpfOgM j02EGBfXyB3RqP4j4UL/O2ptsZKLrtPZfbFdJRfW5QkaDMvXPbKS0YmTeq7WISp+zBBR asbCL9h2Qc0bWOow5TfRlLHhstZQoHC7twwHO2EiC56OUR1sTt9v5bZUUy7AEgKujUtD qLuQ== X-Gm-Message-State: AO0yUKWUAhU1uVl+MNlksL5bTb/wTsAMXiDqNtI3C95OxSZNmBtAc/bZ oGhp9+binenmUGKgG5F9y978Op9DUOc= X-Google-Smtp-Source: AK7set/bspWyLm45L1f5gLz5v+LJeOA8WLTV4Uap3NrU3KQxVGrhbxIfc6JspulNDY5dRiAbBEGwkg== X-Received: by 2002:a17:903:1d1:b0:19e:608d:6844 with SMTP id e17-20020a17090301d100b0019e608d6844mr42998575plh.10.1678661709763; Sun, 12 Mar 2023 15:55:09 -0700 (PDT) Received: from [192.168.0.6] (n175-38-40-102.meb1.vic.optusnet.com.au. [175.38.40.102]) by smtp.gmail.com with ESMTPSA id kc13-20020a17090333cd00b00199023c688esm3370127plb.26.2023.03.12.15.55.07 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 12 Mar 2023 15:55:09 -0700 (PDT) Message-ID: <9ee76b85-9d35-8e30-43b4-5bfd51ff78fb@gmail.com> Date: Mon, 13 Mar 2023 09:55:09 +1100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Thunderbird/102.8.0 Subject: Re: 3.4.6-1 shm_open always returns -1, errno EINVAL Content-Language: en-US To: Csaba Raduly , cygwin list References: From: Matthew Rickard In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-1.3 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM,KAM_SHORT,NICE_REPLY_A,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS,TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: That's perfect, thank you! On 12/03/2023 9:35 pm, Csaba Raduly wrote: > Hi Matthew, ... > https://man7.org/linux/man-pages/man3/shm_open.3.html says: > > For portable use, a shared memory object should be identified by > a name of the form /somename; that is, a null-terminated string > of up to NAME_MAX (i.e., 255) characters consisting of an initial > slash, followed by one or more characters, none of which are > slashes. > > Changing the shm_open call to > > shm_open("/123", O_CREAT | O_RDWR, 0666); > > returns 3 and sets errno to zero. > > Csaba