int main(int argc, char *argv[])
{
FILE *fp; int i, j;
char buf[1024 * BLKSZ_1K];
int blksz = BLKSZ_1K;
u32 *index; u8 *rb, *blk_end;
int rlen, nlen; char *name;
if(argc != 2)
err_usr("wrong command\n");
fp = fopen(argv[1], "r");
if(fp == NULL)
err_sys("fail to fopen");
fread(buf, sizeof(char), 1024 * BLKSZ_1K, fp);
// 获取根目录inode管理结构中的index数组
index = root_index(buf, BLKSZ_1K);
for(i = 0; i < 12; i++){
if(!index[i])
continue;
//求index[i]号的盘块的地址
rb = (u8 *)blk_to_addr(buf, BLKSZ_1K, index[i]);
blk_end = rb + BLKSZ_1K; //此块的末地址
while(rb < blk_end){
rlen = *((u16 *)(rb + 4));//根据存放根目录内容的盘块的地址，偏移到存放此条目录项长度的地址，并取出此目录项的长度.
nlen = *((u8 *)(rb + 6));//求目录项中文件名的长度.
name = (u8 *)(rb + 8);//求文件名首地址.
for(j = 0; j < nlen; j++)
putchar(name[j]);
putchar('\n');
rb += rlen;
}
}
fclose(fp);
return 0;
}
int main(int argc, char *argv[])
{
FILE *fp; int i, j;
char buf[1024 * BLKSZ_1K];
int blksz = BLKSZ_1K;
u32 *index; u8 *rb, *blk_end;
int rlen, nlen; char *name;
if(argc != 2)
err_usr("wrong command\n");
fp = fopen(argv[1], "r");
if(fp == NULL)
err_sys("fail to fopen");
fread(buf, sizeof(char), 1024 * BLKSZ_1K, fp);
index = root_index(buf, BLKSZ_1K);
for(i = 0; i < 12; i++){
if(!index[i])
continue;
rb = (u8 *)blk_to_addr(buf, BLKSZ_1K, index[i]);
blk_end = rb + BLKSZ_1K;
while(rb < blk_end){
rlen = *((u16 *)(rb + 4));
nlen = *((u8 *)(rb + 6));
name = (u8 *)(rb + 8);
for(j = 0; j < nlen; j++)
putchar(name[j]);
putchar('\n');
rb += rlen;
}
}
fclose(fp);
return 0;
}
