Path: csiph.com!usenet.pasdenom.info!news.redatomik.org!newsfeed.xs4all.nl!newsfeed8.news.xs4all.nl!post.news.xs4all.nl!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.001 X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'skip:\\ 20': 0.05; 'bug.': 0.07; 'filename': 0.07; 'skip:\\ 10': 0.07; 'subject:file': 0.07; 'url:msdn': 0.07; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'skip:u 60': 0.09; 'truncate': 0.09; 'python': 0.11; 'jan': 0.11; '2.7': 0.13; 'notations': 0.16; 'received:80.91.229.3': 0.16; 'received:plane.gmane.org': 0.16; 'reedy': 0.16; 'subject:windows': 0.16; 'win7': 0.16; 'wrote:': 0.16; 'skip:u 30': 0.18; '(not': 0.20; 'windows': 0.20; 'extension': 0.20; 'am,': 0.23; '2015': 0.23; 'seems': 0.24; 'header:In-Reply-To:1': 0.24; 'header:User-Agent:1': 0.26; 'header:X-Complaints-To:1': 0.26; '[2]': 0.27; 'terry': 0.29; 'reporting': 0.29; 'e.g.': 0.31; 'operations': 0.31; '[1]': 0.32; "d'aprano": 0.33; 'steven': 0.33; 'windows.': 0.33; 'open': 0.33; 'to:addr:python-list': 0.35; 'fail': 0.35; 'path': 0.35; 'possible,': 0.35; 'unicode': 0.35; 'skip:o 20': 0.35; 'too': 0.36; 'limitation': 0.36; 'hi,': 0.37; 'subject:: ': 0.37; 'received:org': 0.38; 'url:microsoft': 0.39; 'to:addr:python.org': 0.39; 'sure': 0.40; 'where': 0.40; 'even': 0.61; 'more': 0.62; 'making': 0.64; 'thursday': 0.66; 'skip:\xe2 10': 0.70; 'worth': 0.73; '3.4': 0.84; '[error': 0.84; 'calls,': 0.84; 'prefix)': 0.84; 'received:fios.verizon.net': 0.91 X-Injected-Via-Gmane: http://gmane.org/ To: python-list@python.org From: Terry Reedy Subject: Re: windows and file names > 256 bytes Date: Thu, 25 Jun 2015 13:03:53 -0400 References: <558bc6f1$0$11104$c3e8da3@news.astraweb.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable X-Gmane-NNTP-Posting-Host: pool-98-114-97-173.phlapa.fios.verizon.net User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.0.1 In-Reply-To: <558bc6f1$0$11104$c3e8da3@news.astraweb.com> X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.20+ Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 53 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1435251908 news.xs4all.nl 2965 [2001:888:2000:d::a6]:40700 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:93154 On 6/25/2015 5:16 AM, Steven D'Aprano wrote: > On Thursday 25 June 2015 18:00, Albert-Jan Roskam wrote: > >> Hi, >> >> Consider the following calls, where very_long_path is more than 256 by= tes: >> [1] os.mkdir(very_long_path) >> [2] os.getsize(very_long_path) >> [3] shutil.rmtree(very_long_path) >> >> I am using Python 2.7 and [1] and [2] fail under Windows XP [3] fails >> under Win7 (not sure about XP). It throws: =E2=80=9CWindowsError: [Err= or 206] The >> filename or extension is too long=E2=80=9D > > I don't think this is a bug. It seems to be a limitation of Windows. > > https://msdn.microsoft.com/en- > us/library/windows/desktop/aa365247%28v=3Dvs.85%29.aspx#maxpath > >> This is even when I use the "special" >> notations \\?\c:\dir\file or \\?\UNC\server\share\file, e.g. >> os.path.getsize("\\\\?\\" + "c:\\dir\\file") > > However, that may be a bug. > > What happens if you use a Unicode string? > > path =3D u"\\\\?\\c:a\\very\\long\\path" > os.mkdir(path) > > > Can you open an existing file? > > open(u"\\\\?\\c:a\\very\\long\\path\\file.txt") > > > >> (Oddly, os.path.getsize(os.path.join("\\\\?", "c:\\dir\\file")) will >> truncate the prefix) > > That's worth reporting as a bug. If possible, please try the same operations with Python 3.4 or .5 before = making a report --=20 Terry Jan Reedy