Hi,
I recommend this page for info on Large File Support:
<http://www.suse.de/~aj/linux_lfs.html>
--
Didi
On Wed, Feb 25, 2004 at 01:05:17PM -0800, David D wrote:
> Hi,
> I'm desperate!
> I was trying to write a program that uses one of the
> above syscall, but nothing seems to work right for me,
> so please please please take a look and tell me what's
> wrong.
> Summary of the problems:
> 1. without the line "#define stat64 stat" the compiler
> complains that it doesn't know the size of stat64
> structures
> 2. while lstat works fine, fstat and fstat64 give
> absolutely wrong results
> 3. lstat64 completely f#cks up the char pointer that
> it gets as an argument
> 4. open() function return a pretty strange file
> descriptor (3).
> Again, please help me.
> Thanks a lot.
>
> /*test2.c*/
> #include <fcntl.h>
> #include <sys/stat.h>
> #include <errno.h>
> #include <unistd.h>
> #include <stdio.h>
> #include <stdlib.h>
> #include <time.h>
>
> #define stat64 stat
>
> int main(int argc, char *argv[])
> {
> char fileName[50];
> struct stat statbuf;
> struct stat64 statbuf64;
> int a, fstatRet, lstatRet;
> strcpy(fileName, "/etc/passwd");
> printf ("fileName: %s\n", fileName);
> lstatRet=lstat(fileName, &statbuf);
> if (lstatRet) return 1;
> printf("according to lstat: %s was accessed on
> %s\n",fileName, ctime(&(statbuf.st_atime)));
> a=open (fileName,O_RDONLY );
> if (a==-1) printf("could not open %s: %s\n",fileName,
> strerror(errno));
> else printf("%s was opened: %d\n",fileName,a);
> fstatRet=fstat64(a,&statbuf64);
> printf("according to fstat64: %s was accessed on
> %s",fileName,ctime(&(statbuf64.st_atime)));
> fstatRet=fstat(a,&statbuf);
> printf("according to fstat: %s was accessed on
> %s",fileName,ctime(&(statbuf64.st_atime)));
> lstatRet=lstat64(fileName,&statbuf);
> printf("after calling lstat64, the fileName is
> %s\n",fileName);
> return 0;
> }
> $ gcc -o test2 -lm -lc test2.c && ./test2
> fileName: /etc/passwd
> according to lstat: /etc/passwd was accessed on Wed
> Feb 25 23:10:00 2004
> /etc/passwd was opened: 3
> according to fstat64: /etc/passwd was accessed on Thu
> Jan 1 02:00:08 1970
> according to fstat: /etc/passwd was accessed on Thu
> Jan 1 02:00:08 1970
> after calling lstat64, the fileName is ޾
>
>
>
>
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