Re: Cgywin filename with 255 character
Jörg Schaible wrote: Is there any pointer at MS, where this is described exaclty? I was only able to find some entries in the knowledge base that describe applications that are affected by this limit, but nowhere an explanation under what circumstances a process/application is hit by this limit. The 255 character limit is a WinAPI limit, not an OS limit. Posix pathnames built on top of Microsoft's Posix layer wouldn't have this limitation. Many Windows programs expect the maximum path length to be shorter than 255 characters. Therefore, these programs only allocate enough internal storage to handle these typical paths. *NTFS does not have this limit and it can hold much longer paths*. - http://support.microsoft.com/Default.aspx?kbid=320081 Windows has a 255 total char/path limit, but those path are directory and mount-point relative, so the full path from the root can easily exceed 255 characters. If you need to have full posix compatibility, maybe using Microsoft's Posix subsystem will be suitable. Cygwin is built on top of the WinAPI, which still has it's roots in FAT compatibility and is thus limited by that API. Cygwin is unfortunately, not suitable for handling the full range of NTFS filenames (yet :-)). -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
Re: Cgywin filename with 255 character
Xiaomin Wu wrote: Hello, I have problem to touch a file with 255 charaters long filename in Cygwin client (MKS client works fine). After remove 2 of them, it seems work fine. Could you explain why? Thanks a lot! sh-3.1$ pwd /cygdrive/c sh-3.1$ touch c:/file123456789-123456789-123456789-123456789-123456789-12345678 9-123456789-123456789-123456789-123456789-123456789-123456789-123456789-1234567 89-123456789-123456789-123456789-123456789-123456789-123456789-123456789-123456 789-123456789-123456789-1234567.txt == 255 charaters not include c:/ touch: cannot touch `c:/file123456789-123456789-123456789-123456789-123456789-12 3456789-123456789-123456789-123456789-123456789-123456789-123456789-123456789-12 3456789-123456789-123456789-123456789-123456789-123456789-123456789-123456789-12 3456789-123456789-123456789-1234567.txt': File name too long sh-3.1$ touch c:/file123456789-123456789-123456789-123456789-123456789-12345678 9-123456789-123456789-123456789-123456789-123456789-123456789-123456789-1234567 89-123456789-123456789-123456789-123456789-123456789-123456789-123456789-123456 789-123456789-123456789-123456.txt == 254 charaters not include c:/ touch: cannot touch `c:/file123456789-123456789-123456789-123456789-123456789-12 3456789-123456789-123456789-123456789-123456789-123456789-123456789-123456789-12 3456789-123456789-123456789-123456789-123456789-123456789-123456789-123456789-12 3456789-123456789-123456789-123456.txt': File name too long sh-3.1$ touch c:/file123456789-123456789-123456789-123456789-123456789-12345678 9-123456789-123456789-123456789-123456789-123456789-123456789-123456789-1234567 89-123456789-123456789-123456789-123456789-123456789-123456789-123456789-123456 789-123456789-123456789-12345.txt==253 charaters not include c:/ Windows places a limit on the number of ASCII characters in a file/path name. It's approximately 260 characters. Cygwin path conversion may cut that down a bit. -- Larry Hall http://www.rfk.com RFK Partners, Inc. (508) 893-9779 - RFK Office 216 Dalton Rd. (508) 893-9889 - FAX Holliston, MA 01746 -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
Re: Cgywin filename with 255 character
On 7/11/06, Larry Hall (Cygwin) wrote: Windows places a limit on the number of ASCII characters in a file/path name. It's approximately 260 characters. Cygwin path conversion may cut that down a bit. More precisely, both the windows version of the path, and the posix version of the path, must each be less than 260 characters, including the 3 chars of 'C:\' for the windows version and the full path from root for the cygwin version. If you want to access long filenames via a cygwin path, make sure you mount the directory such that the cygwin mountpoint is at least as short as the windows path of the mountpoint. Lev -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
RE: Cgywin filename with 255 character
Hi Larry, Larry Hall (Cygwin) wrote on Tuesday, July 11, 2006 4:50 PM: [snip] Windows places a limit on the number of ASCII characters in a file/path name. It's approximately 260 characters. Cygwin path conversion may cut that down a bit. Is there any pointer at MS, where this is described exaclty? I was only able to find some entries in the knowledge base that describe applications that are affected by this limit, but nowhere an explanation under what circumstances a process/application is hit by this limit. Thanks, Jörg -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
Re: Cgywin filename with 255 character
On 7/11/06, Jörg Schaible wrote: Is there any pointer at MS, where this is described exaclty? I was only able to find some entries in the knowledge base that describe applications that are affected by this limit, but nowhere an explanation under what circumstances a process/application is hit by this limit. http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fileio/fs/naming_a_file.asp -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
Re: Cgywin filename with 255 character
On Tue, Jul 11, 2006 at 06:01:40PM +0200, Jorg Schaible wrote: Hi Larry, Larry Hall (Cygwin) wrote on Tuesday, July 11, 2006 4:50 PM: [snip] Windows places a limit on the number of ASCII characters in a file/path name. It's approximately 260 characters. Cygwin path conversion may cut that down a bit. Is there any pointer at MS, where this is described exaclty? I was only able to find some entries in the knowledge base that describe applications that are affected by this limit, but nowhere an explanation under what circumstances a process/application is hit by this limit. You could also try yesterday's article at http://it.slashdot.org/article.pl?sid=06/07/10/1238246 for some vaguely wrong but occasionally inspired opinions on the subject, at least written in a language less terse than that typically found in most Microsoft documentation. YMMV. -- George +1 Informative -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
