RE: Finding filesizes in C++ for files greater than 4gb

[John Baldwin]

On 02-Aug-01 Joseph Gleason wrote:
> In FreeBSD, how can I determine the size of a file in C++ when the file is
> greater than 4gb?
> 
> Currently, I use stat() and use st_size.  That is limited to 4gb (32bit
> unsigned int)

struct stat {
        ...
        off_t     st_size;              /* file size, in bytes */
        ...
}

/usr/include/sys/types.h:typedef        _BSD_OFF_T_     off_t;          /* file
offset */
/usr/include/machine/ansi.h:#define     _BSD_OFF_T_     __int64_t       /* file
offset */

st_size is not 32 bits on any arch's FreeBSD runs on.  However, you need to
include <sys/types.h> and use off_t for file offsets rather than int or long,
which should fix your problem.

-- 

John Baldwin <[EMAIL PROTECTED]> -- http://www.FreeBSD.org/~jhb/
PGP Key: http://www.baldwin.cx/~john/pgpkey.asc
"Power Users Use the Power to Serve!"  -  http://www.FreeBSD.org/

To Unsubscribe: send mail to [EMAIL PROTECTED]
with "unsubscribe freebsd-hackers" in the body of the message