如何更改linux套接字文件的权限？

我有一个程序,它创建一个套接字,然后我想更改套接字文件的权限：

ret_val = chmod(filename,0777);

,但它不会改变,即使ret_val为0.如果我在常规文件上尝试相同的操作,它也可以.

有任何想法吗？

P.S：我以root身份运行程序,因此它拥有所需的所有权限.

解决方法

来自man 7 unix：

In the Linux implementation,sockets which are visible in the file system
honor the permissions of the directory they are in. Their owner,
group and their permissions can be changed. Creation of a new socket
will fail if the process does not have write and search (execute) permission on the directory the socket is created in. Connecting to the
socket object requires read/write permission. This behavior differs
from many BSD-derived systems which ignore permissions for UNIX domain
sockets. Portable programs should not rely on this feature for security.

因此,如果要控制套接字上的权限,为了便于移植,您应该控制包含套接字的目录的权限.

原文地址：https://www.jb51.cc/linux/394575.html