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CAP_FCNTLS_LIMIT(2)	    BSD	System Calls Manual	   CAP_FCNTLS_LIMIT(2)

NAME
     cap_fcntls_limit, cap_fcntls_get -- manage	allowed	fcntl commands

LIBRARY
     Standard C	Library	(libc, -lc)

SYNOPSIS
     #include <sys/capsicum.h>

     int
     cap_fcntls_limit(int fd, uint32_t fcntlrights);

     int
     cap_fcntls_get(int	fd, uint32_t *fcntlrightsp);

DESCRIPTION
     If	a file descriptor is granted the CAP_FCNTL capability right, the list
     of	allowed	fcntl(2) commands can be selectively reduced (but never	ex-
     panded) with the cap_fcntls_limit() system	call.

     A bitmask of allowed fcntls commands for a	given file descriptor can be
     obtained with the cap_fcntls_get()	system call.

FLAGS
     The following flags may be	specified in the fcntlrights argument or re-
     turned in the fcntlrightsp	argument:

     CAP_FCNTL_GETFL   Permit F_GETFL command.

     CAP_FCNTL_SETFL   Permit F_SETFL command.

     CAP_FCNTL_GETOWN  Permit F_GETOWN command.

     CAP_FCNTL_SETOWN  Permit F_SETOWN command.

RETURN VALUES
     Upon successful completion, the value 0 is	returned; otherwise the
     value -1 is returned and the global variable errno	is set to indicate the
     error.

ERRORS
     cap_fcntls_limit()	succeeds unless:

     [EBADF]		The fd argument	is not a valid descriptor.

     [EINVAL]		An invalid flag	has been passed	in fcntlrights.

     [ENOTCAPABLE]	fcntlrights would expand the list of allowed fcntl(2)
			commands.

     cap_fcntls_get() succeeds unless:

     [EBADF]		The fd argument	is not a valid descriptor.

     [EFAULT]		The fcntlrightsp argument points at an invalid ad-
			dress.

SEE ALSO
     cap_ioctls_limit(2), cap_rights_limit(2), fcntl(2)

HISTORY
     Support for capabilities and capabilities mode was	developed as part of
     the TrustedBSD Project.

AUTHORS
     This function was created by Pawel	Jakub Dawidek <pawel@dawidek.net> un-
     der sponsorship of	the FreeBSD Foundation.

BSD				March 27, 2014				   BSD
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | FLAGS | RETURN VALUES | ERRORS | SEE ALSO | HISTORY | AUTHORS

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