create.c

来自「操作系统简单的登入程序」· C语言 代码 · 共 58 行

#include <stdio.h>
#include "filesys.h"

struct inode*  create(unsigned short userid,char* filename,unsigned short mode);


struct inode*  create(unsigned short userid,char* filename,unsigned short mode)
{
	struct inode* pinode;
    
	struct inode* pinode2;
	
	int pos;

	int inodeid;
		
		readdir2(currentuser);

		inodeid=map2inode(filename);

		if (inodeid!=MAPERR)

			return NULL;
		
		pinode=(struct inode*)malloc(sizeof(struct inode));	

		pinode->di_mode=mode;

		strcpy(pinode->di_uid,directory_1.users[userid].u_uid);		

		strcpy(pinode->di_gid,directory_1.users[userid].u_gid);

		pinode->di_size=1;

		pinode->di_addr[0]=balloc();

		pinode->n_refer=1;

		pinode=(struct inode*)ialloc(pinode);

		pinode2=readdir2(currentuser);

		pos=freedir2id();

		strcpy(directory_2.direct[pos].name,filename);

		directory_2.direct[pos].filetype=DIFILE;

		directory_2.direct[pos].d_ino=pinode->i_ino;

		directory_2.size++;

		dir2todisk(&directory_2,pinode2);

		return pinode;

}