From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg1-x536.google.com (mail-pg1-x536.google.com [IPv6:2607:f8b0:4864:20::536]) by sourceware.org (Postfix) with ESMTPS id ED2F03836C63 for ; Sat, 5 Dec 2020 14:24:40 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org ED2F03836C63 Received: by mail-pg1-x536.google.com with SMTP id q3so5402037pgr.3 for ; Sat, 05 Dec 2020 06:24:40 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:to:from:subject:message-id:date:user-agent :mime-version:content-language:content-transfer-encoding; bh=pScCbUyP27Q8s1NQRHRJ37++wy6oU97Yz0Gf4Os830E=; b=qZqgLJvf3KQzRruamMRrC2QYJ9qLEAJ3qIe9JCCJ5elN/QrsbLWDEKmT19qXiffUmi 3KAY2zF8PYRTAEmqHyN1KVIccC2GpfOQ7mU/cp5Q1FdaM1+BmNKPa5Td64UOjVDbPhsH FsfLtXUxO1xdHAXDhceQgd/MG4gxp9lM/Uej8ZV8fgD+maBI93lhaJFDjb0QkzI4CfMB I8hNLPP9NWG/CUe18biYkFbqXRRi6h8a+bIPAxCq1Kqtj8Gf0qezANbyHTg83nnJT0zk Aw2Roprg+CyJqK5GLgDRZjzlKljMJjdvOxgFKaWn3iOWR6Ljun7zURpSC212TAQ0QtVc cE3Q== X-Gm-Message-State: AOAM531hxS917F4VTGUsrp5cUtPkJKWfNGdzlvDe1EdoR7hrYRiXoJXW Rc+hQfEqiSfz5xH005O9AEzH0mPANqg= X-Google-Smtp-Source: ABdhPJyzGQ1omRZCN8xu9zfcuHCO0mPq+HJUA1WTGt2+ZdRYTg3ZjR9jZSf3Yw3hHGcf+siB8SRtfA== X-Received: by 2002:a05:6a00:1684:b029:18b:665e:5211 with SMTP id k4-20020a056a001684b029018b665e5211mr8875187pfc.20.1607178279684; Sat, 05 Dec 2020 06:24:39 -0800 (PST) Received: from ?IPv6:2400:4153:f103:6500:241c:3410:3d8f:43d9? ([2400:4153:f103:6500:241c:3410:3d8f:43d9]) by smtp.gmail.com with ESMTPSA id 83sm8401278pfy.71.2020.12.05.06.24.38 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 05 Dec 2020 06:24:39 -0800 (PST) To: cygwin@cygwin.com From: tzccinct Subject: Environment variable named !:: (exclamation mark + colon + colon) Message-ID: <552a04ab-86a3-ef03-1c9e-c4d17aff1cd9@gmail.com> Date: Sat, 5 Dec 2020 23:24:36 +0900 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.5.1 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, FREEMAIL_FROM, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: cygwin@cygwin.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: General Cygwin discussions and problem reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 05 Dec 2020 14:25:00 -0000 Hi, I have found an environment variable that has a strange name `!::' (exclamation mark + colon + colon) on my terminal (both mintty and Tera Term). The value is also strange, `::\' (colon + colon + backslash). $ env | sort | head -n 3 !::=::\ _=/usr/bin/env ALLUSERSPROFILE=C:\ProgramData Is this an expected environment variable on Cygwin? If so, what is this for? Best regards, tzccinct