linux stat例程解读文件读写权限

/* ************************************************************************
 *       Filename:  stat2.c
 *    Description:  
 *        Version:  1.0
 *        Created:  2011年05月11日 16时03分23秒
 *       Revision:  none
 *       Compiler:  gcc
 *         Author:  wenhao (wh), hnrain1004@gmail.com
 *        Company:  sunplusapp
 * ************************************************************************/


#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/types.h>
int main(int argc, char *argv[])
{
    struct stat buf;
    if(argc < 2)
    {
        printf("please input filepath!\n");
        exit(1);
    }

    if(stat(argv[1],&buf)<0)
    {
        printf("file not exiting.!\n");
        exit(1);
    }


    if(buf.st_mode&S_IRUSR)
        printf("user can read!\n");
    if(buf.st_mode&S_IWUSR)
        printf("user can write!\n");
    if(buf.st_mode&S_IXUSR)
        printf("user can execute!\n");
    
    if(buf.st_mode&S_IRGRP)
        printf("group can read!\n");
    if(buf.st_mode&S_IWGRP)
        printf("group can write!\n");
    if(buf.st_mode&S_IXGRP)
        printf("group can execute!\n");
    
    if(buf.st_mode&S_IROTH)
        printf("other can read!\n");
    if(buf.st_mode&S_IWOTH)
        printf("other can write!\n");
    if(buf.st_mode&S_IXOTH)
        printf("other can execute!\n");
        
    

    return 0;
}