linux获取文件信息

#include <stdio.h>
#include <stdlib.h>
#include <pwd.h>
#include <grp.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <dirent.h>
#include <time.h>
#include <fcntl.h>
#include <string.h>

void getfilepath(char *filename)
{
	int len = strlen(filename);
	int i = len;
	if(filename[i] != '/'){
		i--;
	}
	filename[i+1]='\0';
}
void getfileinfo(char *filename, char *d_name)
{
	struct stat fileinfo;
	if(stat(filename, &fileinfo)<0)
		perror("stat");
	//判断文件类型
	if(S_ISREG(fileinfo.st_mode))
		printf("-");
	else if(S_ISDIR(fileinfo.st_mode))
		printf("d");
	else if(S_ISCHR(fileinfo.st_mode))
		printf("c");
	else if(S_ISBLK(fileinfo.st_mode))
		printf("b");
	else if(S_ISFIFO(fileinfo.st_mode))
		printf("p");
	else if((fileinfo.st_mode & S_IFMT) == S_IFLNK)
		printf("l");
	else if(S_ISSOCK(fileinfo.st_mode))
		printf("s");
	//获取文件权限
	int i;
	char str[] = "xwr-";
	for(i=8; i >=0; i--)
		if(fileinfo.st_mode & 1<<i)
			printf("%c",str[i%3]);
		else
			printf("%c", str[3]);
	
	printf(" %3u ", fileinfo.st_nlink);
	printf("%s ", getpwuid(fileinfo.st_uid)->pw_name);
	printf("%s ", getgrgid(fileinfo.st_gid)->gr_name);
	printf("%8ld ", fileinfo.st_size);

	struct tm *pt;
	pt = localtime(&fileinfo.st_atime);
	printf("%02d-%02d %02d:%02d ", pt->tm_mon+1, pt->tm_mday,
			pt->tm_hour, pt->tm_min);
	//printf("%s", filename);
	printf("%s", d_name);
	printf("\n");

}
int main(int argc, char **argv)
{
	if(argc <2){
		exit(1);
	}
	//int fd;
	//fd = open(argv[1], O_RDWR);
	DIR *pd;
	if((pd = opendir(argv[1]))== NULL){
		perror("opendir");
		exit(1);
	}
	struct dirent *dir;
	char path[255] ,fullname[255];
	strcpy(path, argv[1]);
	getfilepath(path);
	while((dir=readdir(pd)) != NULL){
		bzero(fullname,255);
		strcpy(fullname,path);
		//printf("%s\n", dir->d_name);
	
		strcat(fullname,dir->d_name);
		//printf("%s\n", fullname);
		//getfileinfo(dir->d_name);
		getfileinfo(fullname, dir->d_name);
	}
	//perror("readdir");
	return 0;
}

运行结果：