Function set_mount_namespace

crates/openshell-supervisor-process/src/process.rs:391–401

(fd: RawFd)

#[cfg(target_os = "linux")]
fn set_mount_namespace(fd: RawFd) -> std::io::Result<()> {
    #[allow(unsafe_code)]
    let rc = unsafe { libc::setns(fd, libc::CLONE_NEWNS) };
    if rc != 0 {
        return Err(std::io::Error::other(format!(
            "failed to enter mount namespace: {}",
            std::io::Error::last_os_error()
        )));
    }
    Ok(())
}

#[cfg(target_os = "linux")]
fn mount_empty_tmpfs(target: &CString) -> std::io::Result<()> {