[Bug libc/4328] New: struct stat is bogus when __USE_FILE_OFFSET64 is defined

["bazsi at balabit dot hu" <sourceware-bugzilla@sourceware.org>]

when __USE_FILE_OFFSET64 is defined fstat() should behave the same as fstat64(),
and struct stat should be compatible with struct stat64. 

This is not the case on my ubuntu edgy system with glibc 2.4-1ubuntu12, but the
same seems to be true for glibc 2.5 as well.

The problem is best described with this gdb session snippet:

(gdb) p (char *)&st.st_size - (char *) &st
$11 = 48
(gdb) p (char *)&st64.st_size - (char *) &st64
$12 = 44

As you can guess, the st_size field contains a bogus value.

I'm using this set of CPPFLAGS:
 -D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 

The problem is that bits/stat.h contains short int sized padN fields while
struct stat64 contains int sized padding fields:

struct stat
  {
    __dev_t st_dev;                     /* Device.  */
    unsigned short int __pad1;
    ...
  }

struct stat64
  {

    __dev_t st_dev;                     /* Device.  */
    unsigned int __pad1;

  }

-- 
           Summary: struct stat is bogus when __USE_FILE_OFFSET64 is defined
           Product: glibc
           Version: 2.4
            Status: NEW
          Severity: critical
          Priority: P2
         Component: libc
        AssignedTo: drepper at redhat dot com
        ReportedBy: bazsi at balabit dot hu
                CC: glibc-bugs at sources dot redhat dot com
  GCC host triplet: i686-pc-linux-gnu


http://sourceware.org/bugzilla/show_bug.cgi?id=4328

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