c – 如何一次写入超过2G的数据()

但是如果我一次尝试写入()数据超过2G(例如64G),write()将返回一个远小于64G的值(完全是2147479552).我猜write()只能一次写入小于2G的数据.

这是我的代码：

#define _GNU_SOURCE
#define _LARGEFILE_SOURCE
#define _LARGEFILE64_SOURCE
#define _FILE_OFFSET_BITS 64

#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <errno.h>
#include <unistd.h>
#include <mmap.h>

#define SPACE_SIZE 68719476736

int main()
{
    ssize_t err;
    void* zeros;
    int fd = open64("./test",O_CREAT|O_RDWR|O_LARGEFILE,0644);
    assert(fd != -1);
    int zero_fd = open("/dev/zero",O_RDWR);
    assert(zero_fd != -1);

    zeros = mmap(NULL,SPACE_SIZE,PROT_READ,MAP_PRIVATE | MAP_ANONYMOUS,zero_fd,0);
    assert(zeros != (void *)-1);
    err = write(fd,zeros,SPACE_SIZE);
    assert(err == SPACE_SIZE);   // Received SIGABRT,err = 2147479552
    munmap(zeros,SPACE_SIZE);
}

如何一次写2(2)以上的数据？

补充资料：

readelf -h ./a.out的结果. a.out是我程序的名字

ELF Header:
Magic:   7f 45 4c 46 02 01 01 00 00 00 00 00 00 00 00 00 
Class:                             ELF64
Data:                              2's complement,little endian
Version:                           1 (current)
OS/ABI:                            UNIX - System V
ABI Version:                       0
Type:                              DYN (Shared object file)
Machine:                           Advanced Micro Devices X86-64
Version:                           0x1
Entry point address:               0x660
Start of program headers:          64 (bytes into file)
Start of section headers:          6672 (bytes into file)
Flags:                             0x0
Size of this header:               64 (bytes)
Size of program headers:           56 (bytes)
Number of program headers:         9
Size of section headers:           64 (bytes)
Number of section headers:         29
Section header string table index: 28