_dir.h

Unix shell是unix的命令解释程序

#include<stdio.h>
#include<sys/types.h>
#include<dirent.h>
int _dir(char *argv)
{
	DIR *dp;
	struct dirent *dirp;
//	if(argc!=2)
//	{
//		printf("a single argument (the directory name) is required");
//		exit(0);
//	}
	if((dp=opendir(argv))==NULL)
	{
		printf("can't open %s",argv);
//		exit(0);
		return 0;
	}
	while ((dirp=readdir(dp))!=NULL)
		printf("%s\n",dirp->d_name);
	closedir(dp);
//	exit(0);
	return 1;
}