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.
