C-分段故障:11

Question

嗨，我必须为我的大学做一个磁盘模拟。

我有2个文件：

tttfs.h:

#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
typedef struct _disk disk;
typedef struct _block block;
struct _block{
    uint8_t *unBlock;
};
struct _disk{
    int id;
    block *diskBlock;
};

tfs_create.c：

#include "tttfs.h"
uint8_t little[4];
int tttfs_create(int size, char *name);
void inttolitend(uint32_t x, uint8_t* lit_int);
int main(){
    tttfs_create(7, "disk.tfs");
}
int tttfs_create(int size, char *name){
    FILE *f = NULL;
    if ((f = fopen(name, "wb"))!=NULL)
    {
    disk *d = malloc(sizeof(disk));
    d->diskBlock = malloc(1024);
    d->id = 1;
    int i;
    for(i = 0; i<size; i++){
       printf("%dn", i);
       d->diskBlock[i].unBlock = malloc(1024); //I got the segmentation fault here
    }
    inttolitend(size, little);
    for(i = 0; i<4; i++){
       d->diskBlock[0].unBlock[i] = little[i];
    }
    for(i = 0; i<size; i++){
       fwrite(&d->diskBlock[i],1024,1,f);
    }
    }
    else
        printf("Erreurnn");
    return 0;
}
void inttolitend(uint32_t x, uint8_t* lit_int){
   lit_int[3] = (uint8_t)x / (256*256*256);
   lit_int[2] = (uint8_t)(x % (256*256*256)) / (256*256);
   lit_int[1] = (uint8_t)((x % (256*256*256)) % (256*256)) / 256;
   lit_int[0] = (uint8_t)((x % (256*256*256)) % (256*256)) % 256;
}

我想在一个文件中写一个数字块（这里是7），所以我对我的磁盘结构的大小做malloc，然后在diskBlock上做一个malloc来制作一个表d->diskBlock[0]。unBlock=malloc（1024）；但不是为了更多。我怎么能用我的结构做一个块[大小]？（我不擅长c）

Answer 1

我认为你应该更改这行

d->diskBlock = malloc(1024);

至

d->diskBlock = malloc(sizeof(block) * size);

---

而且，这个

d->diskBlock[i].unBlock = malloc(1024);

至

d->diskBlock[i].unBlock = malloc(sizeof(uint8_t) * 4);