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/* Sample program for configure to test Large File support on target

platforms.

*/

#define _LARGEFILE_SOURCE

#define _LARGE_FILES

#define _FILE_OFFSET_BITS 64

#include <unistd.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <assert.h>

#include <stdio.h>

int main( int, char **argv )

{

// check that off_t can hold 2^63 - 1 and perform basic operations...

#define OFF_T_64 (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))

    if (OFF_T_64 % 2147483647 != 1)

	return 1;

    // stat breaks on SCO OpenServer

    struct stat buf;

    stat( argv[0], &buf );

    if (!S_ISREG(buf.st_mode))

	return 2;

    FILE *file = fopen( argv[0], "r" );

    off_t offset = ftello( file );

    fseek( file, offset, SEEK_CUR );

    fclose( file );

    return 0;

}