problems with stat on darwin

I am using "struct stat file_stat" in order to retriev information about a file (namely the filesize).  When I run a simple program that just gets the file size of a file and prints out the filesize, it works on Solaris workstations, and on a P4 cluster running linux.  However, when it is running on an Apple G5 cluster running Darwin, Mac OS X 10.4, the program fails (the function stat() returns -1).

I also had problems compiling a program that explicitly declared a type off_t, which compiled on the other systems, but on the G5 cluster it failed and claimed that it did not understand off_t.  I am assuming that these problems are related.

Does anyone here have experience with working with C on Darwin, and if so, do you have any idea what could cause this problem?  Thank you for your help.


My program is below:

#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#define TRUE 0
#define FALSE 1

unsigned long long getFileSize(char filename[]);

int main(int argc, char **argv)
{
      unsigned long long head, seq, size, tot;
      unsigned long long bufferSize = 1000000;
      
      char * filename = "yeast.fsa\0";
      printf("Reading in file:%s\n",filename);

      //      read fasta calls
      size = getFileSize(filename);
      
      printf("file size: %lld\n",size);
      
      return 0;
}


unsigned long long getFileSize(char filename[]){
      static unsigned long long size = 0;
      static short int fileSizeSet = FALSE;
      
      struct stat file_stat;
      int error;
      // only set the filesize once, then just
      // keep this value in memory, and use
      // "GET FILE SIZE" to get it!
      if(fileSizeSet == FALSE){
            error = stat(filename, &file_stat);
            
            if(error == -1){
                  return 0;      
            }
            else{
                  size = (unsigned long long)file_stat.st_size;
                  fileSizeSet = TRUE;
            }
      }
      
      return size;
}