linux mkdir 功能无法授权完全权限 [英] linux mkdir function can't authorize full permission

问题描述

我正在测试 mkdir 函数来创建一个新目录:

I am testing the mkdir function to create a new directory:

folder =  mkdir("./linux", 511);

或

 folder = mkdir("./linux", 0777);

或

folder = mkdir("./linux", S_IRWXU | S_IRWXG | S_IRWXO);

如您所见，我尝试授予对目录的完全权限，但这是 ls -l | 的结果.grep linux:

As you can see, I try to authorize the full permission to the directory but here's what comes up with ls -l | grep linux:

drwxr-xr-x 2 manuzhang manuzhang 4096 2012-01-04 06:53 linux

为什么我不能为组和其他人授予写权限?

why can't I authorize write permission for group and others?

更新:
奇怪的事情，正如你们告诉我的，我尝试了 umask.它适用于 umask(S_IWGRP) 或 umask(S_IWOTH) 但失败与 umask(S_IWGRP | S_IWOTH)，有什么想法吗?

Updates:
weird thing, as you guys told me I tried umask. It works with either umask(S_IWGRP) or umask(S_IWOTH) but fails with umask(S_IWGRP | S_IWOTH), any ideas?

推荐答案

来自 man 2 mkdir:

参数 mode 指定要使用的权限.由进程的 umask 以通常的方式修改:创建的目录的权限为 (mode & ~umask & 0777).

The argument mode specifies the permissions to use. It is modified by the process's umask in the usual way: the permissions of the created directory are (mode & ~umask & 0777).

我建议您查看您的 umask - 它可能设置为 0022.尝试 chmod 后 mkdir.

I suggest you look at your umask - it is probably set to 0022. Try a chmod post-mkdir.

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