What's the equivalent to chattr in the rust standard library?-CodePudding

I need to execute the equivalent of chattr i myfile.txt in rust.

Since the call for chmod is fs::set_permissions() I was expecting something like fs::set_attributes() to also exists, but I cannot find it in the docs.

Is there an std function to set (linux) file attributes?

CodePudding user response：

There is nothing in the standard library for this. The i attribute, and file attributes in general, are very system specific, and are outside the scope for a portable standard library.

Internally, the chattr uses the FS_IOC_SETFLAGS ioctl. You may have to implement code that uses it yourself, using a crate like nix can help.

CodePudding user response：

Use std::os::unix::fs::PermissionsExt.

Example from the stdlib:

use std::fs::File;
use std::os::unix::fs::PermissionsExt;

fn main() -> std::io::Result<()> {
    let f = File::create("foo.txt")?;
    let metadata = f.metadata()?;
    let mut permissions = metadata.permissions();

    permissions.set_mode(0o644); // Read/write for owner and read for others.
    assert_eq!(permissions.mode(), 0o644);
    Ok(())
}