Method is_writable

block/src/qcow/raw_file.rs:125–133

Returns true if the file was opened with write access.

(&self)

    /// Returns true if the file was opened with write access.
    pub fn is_writable(&self) -> bool {
        // SAFETY: fcntl with F_GETFL is safe and doesn't modify the file descriptor
        let flags = unsafe { libc::fcntl(self.file.as_raw_fd(), libc::F_GETFL) };
        if flags < 0 {
            return false;
        }
        let access_mode = flags & libc::O_ACCMODE;
        access_mode == libc::O_WRONLY || access_mode == libc::O_RDWR
    }
}

impl Read for RawFile {