access函数使用方法＋例子

    #include

    int access (const char *pathname, int mode)

    mode      说明

    R_OK      测试读许可权

    W_OK     测试写许可权

    X_OK      测试执行许可权

    F_OK       测试文件是否存在

          1 #include
          2 #include
          3 #include
          4 #include
          5
          6
          7 main(int argc, char *argv[])
          8 {
          9         if(argc != 2)
         10                 printf("usage: a.out \n");
         11         if(access(argv[1], R_OK) < 0)
         12                 printf("access error for %s\n", argv[1]);
         13         else
         14                 printf("read access OK\n");
         15         if(open(argv[1], O_RDONLY) < 0)
         16                 printf("open error for %s\n",argv[1]);
         17         else
         18                 printf("open for reading OK\n");
         19         exit(0);
         20 }