Name

bindmount - create a bindmount from source_fd to a target path.

Synopsis

#include <LibCore/System.h>

ErrorOr<void> bindmount(int source_fd, StringView target, int flags);

Description

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.

Errors

• 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.

See also

• mount(2)