Re: [Mingw-users] getting the size of large files under ntfs

[Earl K. <eh...@go...>]

>>In comparing various packages that provide an UNIX-like under Windows, I
>>found that the stat() function in the MINGW clib does not return the proper
>>file size for files over 4 gigabytes.
>
>Yes. The documentation page for _stat() (on MSDN) does also describe 
>_stati64(), which should give better results (as would GetFileSize()).

The sys/stat.h header for MINGW contains a prototype for _stati64().  There
also appears to be a _stati64() in the libraries included with MINGW.
Nonetheless, when I wrote a programme that used stat() and _stati64(), the
two nominally different routines seemed to return exactly the same (wrong)
file size for my 4.8 gigabyte test file.  This makes me wonder if the MINGW
library _stati64() is really a different routine or just a disguised call
to the bog standard stat() function.

The code for my programme is appended below.

EHK


#include        <stdio.h>
#include        <sys/stat.h>
main( int argc, char *argv[] )
{
         int     ix;
         struct stat     sb;
         struct _stati64 sx;
         if( argc <= 1 ) {
                 printf("teststat filename(s)\n");
                 exit(0);
                 }
         for( ix = 1; ix < argc; ix++ ) {
                 printf("%32.32s ",argv[ix]);
                 if(stat(argv[ix],&sb)) {
                         printf("%s\n","failed");
                         }
                 else {
                         printf("%10lu ",sb.st_size);
                         printf("%s",ctime(&sb.st_mtime));
                         }
                 printf("%32.32s ",argv[ix]);
                 if(_stati64(argv[ix],&sx)) {
                         printf("%s\n","failed");
                         }
                 else {
                         printf("%10lu ",sx.st_size);
                         printf("%s",ctime(&sx.st_mtime));
                         }
                 }
         exit(0);
}