程序4-2 access函数实例

//http://blog.chinaunix.net/uid-24549279-id-71355.html
/*
 ============================================================================
 Name        : test.c
 Author      : blank
 Version     :
 Copyright   : Your copyright notice
 Description : 程序4-2 access函数实例
 ============================================================================
*/

#include <stdio.h>
#include <fcntl.h>
#include <sys/stat.h>
#include "ourhdr.h"

#define BUFFSIZE 4096

int main(int argc, char *argv[])
{
    if (argc != 2){
        err_quit("usage: ./test <filename>
");
    }

    if (access(argv[1], R_OK) < 0){
        err_ret("access error for %s", argv[1]);
    }else{
        printf("read access OK
");
    }

    if (open(argv[1], O_RDONLY) < 0){
        err_ret("open error for %s", argv[1]);
    }else{
        printf("open for read OK
");
    }

    exit(0);
}