Forum Navigation

FilePath.exists = false with large files

Moderators: kris

lulabad

Joined: 04/24/08

Posts: 7
Posted: 01/21/09 12:39:19
simple example:
module test;

import tango.io.Stdout;
import tango.io.FilePath;

void main(char[][] args) {
    
    auto fp = new FilePath(args[1]);
    Stdout(fp.exists()).newline;
        
}
I call this with a file which size is 2.4G. It returns false. If i remove the file an create it with size 0 it return true

Is this a Bug in Tango or is this a System Problem

I use Red Hat 5.

(sorry for bad english)

Sorry for my bad English, im German ;)

Author Message
Cyborg16

Joined: 04/28/07

Posts: 54
Posted: 01/21/09 16:06:31

Just to check you're not compiling with version=SMALLFILE ? You could check USE_LARGEFILE64 in tango/stdc/posix/config.d to be sure.

The tango check "exists" actually returns true if no errors occur getting a stat of the file, so another error could have occurred.

You could try the following C program to check what the error actually is (it doesn't seem possible to get the error with D):

#include <errno.h> #include <sys/stat.h> #include <stdio.h> int main (int argc, char *argv[]) { if (argc < 2) return 1; struct stat stats; if (stat (argv[1], &stats)) { printf ("Error from stat: %d\n",errno); return 1; } return 0; }
and look it up: http://www.opengroup.org/onlinepubs/009695399/functions/stat.html
lulabad

Joined: 04/24/08

Posts: 7
Posted: 01/22/09 07:23:21

this is my tango/stdc/posix/config.d:

/** * D header file for POSIX. * * Copyright: Public Domain * License: Public Domain * Authors: Sean Kelly * Standards: The Open Group Base Specifications Issue 6, IEEE Std 1003.1, 2004 Edition */ module tango.stdc.posix.config; public import tango.stdc.config; extern (C): version( linux ) { version( none /* X86_64 */ ) { const bool __USE_LARGEFILE64 = true; } else { const bool __USE_LARGEFILE64 = false; } const bool __USE_FILE_OFFSET64 = __USE_LARGEFILE64; const bool __REDIRECT = false; }
I have an X86_64 System. if i change the second USE_LARGEFILE64 to true i get some errors like this:

Error: identifier 'off64_t' is not defined
your small programm runs without any error.

This is the output from stat Programm:

File: „/file-name-is-secret“ Size: 2492461056 Blocks: 4872856 IO Block: 4096 reguläre Datei Device: 16h/22d Inode: 2053144659 Links: 1 Access: (0640/-rw-r-----) Uid: ( 1019/ xxxxx Gid: ( xxx/ xxxx) Access: 2009-01-16 10:56:40.000000000 +0100 Modify: 2009-01-15 13:15:20.000000000 +0100 Change: 2009-01-15 13:15:20.000000000 +0100
Sorry for my bad English, im German ;)
Cyborg16

Joined: 04/28/07

Posts: 54

Posted: 01/22/09 09:34:14

Could you update to tango trunk (or wait for the 0.99.8 release)? I fixed large file support since 0.99.7.

lulabad

Joined: 04/24/08

Posts: 7

Posted: 01/22/09 11:30:17

Ok, update was hard because i using dwt and deprecated colletions ;) but now it works fine. thanks.

Sorry for my bad English, im German ;)