Function inotify_add_watch 

pub fn inotify_add_watch(
    instance_id: u64,
    inode: u64,
    path: &str,
    mask: u32,
) -> Result<i32, KernelError>

Add a watch to an inotify instance.

Watches the inode at the given path for the specified event types. If the inode is already watched by this instance, the watch mask is updated.

Arguments

• instance_id - The inotify instance (from inotify_init)
• inode - Inode number to watch
• path - Path being watched (stored for debugging)
• mask - Bitmask of event types to watch (IN_CREATE, IN_MODIFY, etc.)

Returns the watch descriptor (wd).