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How can I control file access in Windows using Go?

Barbara Streisand

Oct 26, 2024 pm 08:53 PM

How can I control file access in Windows using Go?

Controlling File Access in Windows with Go

While Go's os.Chmod() function effortlessly sets file and directory permissions on Linux, it falls short on Windows. Understanding the intricacies of Windows access controls is crucial in this scenario.

Windows File and Directory Permissions

Unlike Unix, Windows employs a more nuanced access control system based on ACLs (Access Control Lists) and ACEs (Access Control Entries). ACLs contain ACEs that define the access rights for specific users and groups.

Solution: Using Go-ACL Package

Manipulating ACLs and ACEs manually can be tedious. Luckily, the go-acl package simplifies this task by exposing a Chmod() function tailored for Windows:

<code class="go">import "github.com/hectane/go-acl"

err := acl.Chmod("C:\path\to\file.txt", 0755)</code>

This function creates three ACEs in the file's ACL:

One for the owner (WinCreatorOwnerSid)
One for the group (WinCreatorGroupSid)
One for everyone else (WinWorldSid)

The permissions granted by these ACEs correspond to the specified octal value (e.g., 0755).

Results

Upon executing Chmod(), the target file's ACL is modified to reflect the desired permissions for the owner, group, and everyone else, effectively controlling access to the file or directory on Windows using Go.

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