 
bindmount - create a bindmount from source_fd to a target path.
#include <LibCore/System.h>
ErrorOr<void> bindmount(int source_fd, StringView target, int flags);bindmount() create a bindmount from source_fd to a target path target, with mount flags of flags.
The following flags are supported:
MS_NODEV: Disallow opening any devices from this file system.MS_NOEXEC: Disallow executing any executables from this file system.MS_NOSUID: Ignore set-user-id bits on executables from this file system.MS_RDONLY: Mount the filesystem read-only.MS_WXALLOWED: Allow W^X protection circumvention for executables on this file system.MS_AXALLOWED: Allow anonymous executable mappings for executables on this file system.MS_NOREGULAR: Disallow opening any regular files from this file system.These flags can be used as a security measure to limit the possible abuses of the mounted file system.
EINVAL: The flags value contains deprecated flags such as MS_REMOUNT or MS_BIND.EPERM: The current process does not have superuser privileges.ENODEV: The source_fd is not an open file descriptor to a valid filesystem inode.All of the usual path resolution errors may also occur.