简单文件系统的实现的实验报告(5)

/* 原型声明: 功能描述： 输入：

dirname

指向新建目录的名字的指针

void my_mkdir(char *dirname)

创建子目录函数,在当前目录下创建名为dirname的目录

输出：无

函数功能实现算法描述： */

void my_mkdir(char *dirname) {

fcb *dirfcb,*pcbtmp; int rbn,i,fd;

unsigned short bknum; char text[MAX_TXT_SIZE],*p; time_t *now; struct tm *nowtime; /*

将当前的文件信息读到text中 rbn 是实际读取的字节数 */

openfilelist[curfd].count=0;

rbn = do_read(curfd,openfilelist[curfd].length,text); dirfcb=(fcb *)text; /*

检测是否有相同的目录名 */

for(i=0;i

分配一个空闲的打开文件表项 */

dirfcb=(fcb *)text;

for(i=0;i

if(strcmp(dirname,dirfcb->filename)==0) { } dirfcb++;

printf(\eady exist!\\n\return -1;

}

if(strcmp(dirfcb->filename,\

break;

dirfcb++;

openfilelist[curfd].count=i*sizeof(fcb); fd=findFreeO(); if(fd<0) { } /*

寻找空闲盘块 */

bknum = findFree(); if(bknum == END ) { }

pcbtmp=(fcb *)malloc(sizeof(fcb)); now=(time_t *)malloc(sizeof(time_t));

//在当前目录下新建目录项 pcbtmp->attribute=0x30; time(now);

nowtime=localtime(now);

pcbtmp->time=nowtime->tm_hour*2048+nowtime->tm_min*32+nowtime->tm_sec/2; pcbtmp->date=(nowtime->tm_year-80)*512+(nowtime->tm_mon+1)*32+nowtime->tm_mday; strcpy(pcbtmp->filename,dirname); strcpy(pcbtmp->exname,\ pcbtmp->first=bknum; pcbtmp->length=2*sizeof(fcb);

openfilelist[fd].attribute=pcbtmp->attribute; openfilelist[fd].count=0;

openfilelist[fd].date=pcbtmp->date;

strcpy(openfilelist[fd].dir[fd],openfilelist[curfd].dir[curfd]);

p=openfilelist[fd].dir[fd]; while(*p!='\\0')

p++; return -1; return -1;

strcpy(p,dirname); while(*p!='\\0') p++;

*p='\\\\';p++; *p='\\0';

openfilelist[fd].dirno=openfilelist[curfd].first; openfilelist[fd].diroff=i;

strcpy(openfilelist[fd].exname,pcbtmp->exname); strcpy(openfilelist[fd].filename,pcbtmp->filename); openfilelist[fd].fcbstate=1; openfilelist[fd].first=pcbtmp->first; openfilelist[fd].length=pcbtmp->length; openfilelist[fd].free=1;

openfilelist[fd].time=pcbtmp->time; openfilelist[fd].topenfile=1;

do_write(curfd,(char *)pcbtmp,sizeof(fcb),2);

pcbtmp->attribute=0x28; time(now);

nowtime=localtime(now);

pcbtmp->time=nowtime->tm_hour*2048+nowtime->tm_min*32+nowtime->tm_sec/2; pcbtmp->date=(nowtime->tm_year-80)*512+(nowtime->tm_mon+1)*32+nowtime->tm_mday; strcpy(pcbtmp->filename,\ strcpy(pcbtmp->exname,\ pcbtmp->first=bknum; pcbtmp->length=2*sizeof(fcb);

do_write(fd,(char *)pcbtmp,sizeof(fcb),2);

pcbtmp->attribute=0x28; time(now);

nowtime=localtime(now);

pcbtmp->time=nowtime->tm_hour*2048+nowtime->tm_min*32+nowtime->tm_sec/2; pcbtmp->date=(nowtime->tm_year-80)*512+(nowtime->tm_mon+1)*32+nowtime->tm_mday; strcpy(pcbtmp->filename,\ strcpy(pcbtmp->exname,\ pcbtmp->first=openfilelist[curfd].first; pcbtmp->length=openfilelist[curfd].length;

do_write(fd,(char *)pcbtmp,sizeof(fcb),2);

openfilelist[curfd].count=0;

do_read(curfd,openfilelist[curfd].length,text);

pcbtmp=(fcb *)text;

pcbtmp->length=openfilelist[curfd].length; my_close(fd);

openfilelist[curfd].count=0;

do_write(curfd,text,pcbtmp->length,2); } /**/ /* 原型声明: 功能描述： 输入： 输出：

函数功能实现算法描述： */

void my_ls() {

fcb *fcbptr; int i;

char text[MAX_TXT_SIZE]; unsigned short bknum; openfilelist[curfd].count=0;

do_read(curfd,openfilelist[curfd].length,text); fcbptr=(fcb *)text;

for(i=0;i<(int)(openfilelist[curfd].length/sizeof(fcb));i++) {

if(fcbptr->filename[0]!='\\0') {

if(fcbptr->attribute&0x20) {

void my_ls() 显示目录函数 无 无

printf(\

&0x000f,(fcbptr->date)&0x001f,fcbptr->time>>11,(fcbptr->time>>5)&0x003f,fcbptr->time&0x001f*2);

} else {

printf(\

te)>>9)+1980,(fcbptr->date>>5)&0x000f,fcbptr->date&0x1f,fcbptr->time>>11,(fcbptr->time>>5)&0x3f,fcbptr->time&0x1f*2);

} fcbptr++;

}

}

openfilelist[curfd].count=0; } /**/ /* 原型声明: 功能描述： 输入：

dirname

指向新建目录的名字的指针

void my_rmdir(char *dirname) 删除子目录函数

输出：无

函数功能实现算法描述： */

void my_rmdir(char *dirname) {

int rbn,fd;

char text[MAX_TXT_SIZE]; fcb *fcbptr,*fcbtmp,*fcbtmp2; unsigned short bknum; int i,j;

fat *fat1,*fatptr;

if(strcmp(dirname,\ { }

fat1=(fat *)(myvhard+BLOCKSIZE); openfilelist[curfd].count=0;

rbn=do_read(curfd,openfilelist[curfd].length,text); fcbptr=(fcb *)text;

for(i=0;i

if(i >= rbn/sizeof(fcb)) {

printf(\if(strcmp(dirname,fcbptr->filename)==0) { } fcbptr++;

break;

printf(\return -1;