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40 .Nd Capsicum capability rights for file descriptors
42 When a file descriptor is created by a function such as
56 it is assigned all capability rights.
57 Those rights can be reduced (but never expanded) by using the
58 .Xr cap_rights_limit 2 ,
59 .Xr cap_fcntls_limit 2 and
60 .Xr cap_ioctls_limit 2
62 Once capability rights are reduced, operations on the file descriptor will be
63 limited to those permitted by rights.
65 The complete list of capability rights is provided below.
68 type is used to store list of capability rights.
71 family of functions should be used to manage the structure.
73 The following rights may be specified in a rights mask:
74 .Bl -tag -width CAP_EXTATTR_DELETE
82 .Xr acl_valid_fd_np 3 .
85 .Xr acl_delete_fd_np 3 .
99 Note that sockets can also become bound implicitly as a result of
103 and that socket options set with
105 may also affect binding behavior.
109 This right has to be present on the directory descriptor.
110 This right includes the
123 with a non-NULL destination address.
127 This right has to be present on the directory descriptor.
128 This right includes the
143 to be used in monitoring the file descriptor for events.
144 .It Dv CAP_EXTATTR_DELETE
146 .Xr extattr_delete_fd 2 .
147 .It Dv CAP_EXTATTR_GET
149 .Xr extattr_get_fd 2 .
150 .It Dv CAP_EXTATTR_LIST
152 .Xr extattr_list_fd 2 .
153 .It Dv CAP_EXTATTR_SET
155 .Xr extattr_set_fd 2 .
166 right is also present.
174 right is also present.
187 right is also present.
202 commands require this capability right.
203 Also note that the list of permitted commands can be further limited with the
204 .Xr cap_fcntls_limit 2
237 Permit UFS background-fsck operations on the descriptor.
245 right is also present.
284 right is also present.
290 .It Dv CAP_GETPEERNAME
293 .It Dv CAP_GETSOCKNAME
296 .It Dv CAP_GETSOCKOPT
302 Be aware that this system call has enormous scope, including potentially
303 global scope for some objects.
304 The list of permitted ioctl commands can be further limited with the
305 .Xr cap_ioctls_limit 2
309 .Dv CAP_KQUEUE_CHANGE
311 .Dv CAP_KQUEUE_EVENT .
312 .It Dv CAP_KQUEUE_CHANGE
317 descriptor that modifies list of monitored events (the
319 argument is non-NULL).
320 .It Dv CAP_KQUEUE_EVENT
325 descriptor that monitors events (the
327 argument is non-NULL).
329 is also required on file descriptors that will be monitored using
336 on the destination directory descriptor.
337 This right includes the
343 not much use (generally) without
346 Permit the file descriptor to be used as a starting directory for calls such as
360 This right includes the
366 This right includes the
372 This right includes the
387 This right includes the
414 This right includes the
430 This right includes the
473 is also required) and related system calls.
480 This right is required on the source directory descriptor.
481 This right includes the
485 Permit operations that seek on the file descriptor, such as
487 but also required for I/O system calls that can read or write at any position
492 .It Dv CAP_SEM_GETVALUE
506 .It Dv CAP_SETSOCKOPT
509 this controls various aspects of socket behavior and may affect binding,
510 connecting, and other behaviors with global scope.
514 closing the socket will also generally shut down any connections on it.
518 This right includes the
522 Allow configuration of TTY hooks, such as
524 on the file descriptor.
530 This right is only required for
532 on the destination directory descriptor if the destination object already
533 exists and will be removed by the rename.
534 This right includes the
553 and related system calls.
556 with a non-NULL connection address,
563 flag, but without the
585 .Xr cap_fcntls_limit 2 ,
586 .Xr cap_ioctls_limit 2 ,
587 .Xr cap_rights_limit 2 ,
591 .Xr extattr_delete_fd 2 ,
592 .Xr extattr_get_fd 2 ,
593 .Xr extattr_list_fd 2 ,
594 .Xr extattr_set_fd 2 ,
653 .Xr acl_delete_fd_np 3 ,
655 .Xr acl_get_fd_np 3 ,
657 .Xr acl_set_fd_np 3 ,
658 .Xr acl_valid_fd_np 3 ,
668 Support for capabilities and capabilities mode was developed as part of the
673 This manual page was created by
674 .An Pawel Jakub Dawidek Aq Mt pawel@dawidek.net
675 under sponsorship from the FreeBSD Foundation based on the
678 .An Robert Watson Aq Mt rwatson@FreeBSD.org .