操作系统实验报告(4)

shuru:

printf(\scanf(\for(i=0;i

{if(!strcmp(namestr,mfd[i].uname)) /*xiang deng*/ break; }/*for*/ if(i>=N) {

printf(\ goto shuru; }

instructions:

printf(\printf(\———→create a file\\n\printf(\ ———→open a file\\n\printf(\ ———→close a file\\n\printf(\ ———→read a file\\n\printf(\ ———→write a file\\n\printf(\———→delete a file\\n\printf(\ ———→quit the system\\n\printf(\scanf(\

if(!strcmp(order,\ { create(i); goto instructions;} else if(!strcmp(order,\ { open(i); goto instructions; }

else if(!strcmp(order,\ { close(i); goto instructions; }

else if(!strcmp(order,\ { Read(i); goto instructions; }

else if(!strcmp(order,\ { delete(i); goto instructions; }

else if(!strcmp(order,\

{ write(i); goto instructions; }

else if(!strcmp(order,\

{ printf(\ return(0); } else

{ printf(\ goto instructions; } }

/*-------------zhu han shu------------------*/

/*=================create()==================== */ create(int x){

char filename[20]; int j;

int length;

char prority[20]; int address;

rand();/*chu shi hua sui ji han shu*/

printf(\ printf(\ scanf(\ for(j=0;j

{ if(!strcmp(mfd[x].ufd[j].fname,filename))/*yi cun zai*/ { printf(\ break; }/*if*/

else if(strlen(mfd[x].ufd[j].fname)==0) /*bu cun zai*/ { strcpy(mfd[x].ufd[j].fname,filename); printf(\ printf(\ scanf(\ mfd[x].ufd[j].length=length; printf(\ scanf(\ strcpy(mfd[x].ufd[j].shuxing,prority); mfd[x].ufd[j].addr=rand(); mfd[x].uof[j].w=mfd[x].ufd[j].addr; strcpy(mfd[x].uof[j].state,\

printf(\

break; }/*else*/ }/*for*/ }

/*================create=====================*/

/*================open()=====================*/ open(int x) {

int j,k;

char filename[20];

printf(\ printf(\ scanf(\ for(j=0;j

{ if(!strcmp(mfd[x].ufd[j].fname,filename))/*yi cun zai*/ {/*if*/ for(k=0;k

if(strcmp(mfd[x].ufd[j].shuxing,\x].ufd[j].shuxing,\ { strcpy(mfd[x].uof[k].fname,filename); mfd[x].uof[k].length=mfd[x].ufd[j].length; strcpy(mfd[x].uof[k].shuxing,mfd[x].ufd[j].shuxing); strcpy(mfd[x].uof[k].state,\ mfd[x].uof[k].w=mfd[x].ufd[j].addr; mfd[x].uof[k].r=mfd[x].ufd[j].addr; printf(\ }/* da kai cheng gong*/ else printf(\ break; }/*bu zai uof*/ }/*for k*/

break; }/*if*/ else if(strlen(mfd[x].ufd[j].fname)==0) /*mei you gai wen jian*/ { printf(\ break; } }/*wai for*/ }

/*=================open================*/

/*=================close()==============*/ close(int x) { int j;

char filename[20];

printf(\ scanf(\ for(j=0;j

if(!strcmp(mfd[x].uof[j].fname,filename))/*UOF zhong you*/ { if(!strcmp(mfd[x].uof[j].state,\ strcpy(mfd[x].uof[j].state,\ else strcpy(mfd[x].uof[j].fname,\

strcpy(mfd[x].uof[j].fname,\ strcpy(mfd[x].uof[j].shuxing,\ strcpy(mfd[x].uof[j].state,\ mfd[x].uof[j].length=0; printf(\ break; }

else if(strlen(mfd[x].uof[j].fname)==0) { printf(\ break; } }/*for*/ }

/*================close==================*/

/*================read()=================*/ Read(int x) { int j;

int length;

char filename[20];

printf(\ scanf(\ for(j=0;j

if(!strcmp(mfd[x].uof[j].fname,filename))/*UOF zhong you*/ { if(!strcmp(mfd[x].uof[j].state,\ { printf(\ for(length=0;length

else if(strlen(mfd[x].uof[j].fname)==0) { printf(\ break; } }/*for*/ }

/*=====================read===================*/

/*====================write()===================*/ write(int x) {

int j,k;

char filename[20];

printf(\ printf(\ scanf(\ for(k=0;k