FreeBSD/Linux Kernel Cross Reference
sys/sys/capsicum.h

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2008-2010, 2015 Robert N. M. Watson
      * Copyright (c) 2012 FreeBSD Foundation
      * All rights reserved.
      *
      * This software was developed at the University of Cambridge Computer
      * Laboratory with support from a grant from Google, Inc.
     *
     * Portions of this software were developed by Pawel Jakub Dawidek under
     * sponsorship from the FreeBSD Foundation.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * $FreeBSD$
     */
    
    /*
     * Definitions for FreeBSD capabilities facility.
     */
    #ifndef _SYS_CAPSICUM_H_
    #define _SYS_CAPSICUM_H_
    
    #include <sys/cdefs.h>
    #include <sys/param.h>
    
    #include <sys/caprights.h>
    #include <sys/file.h>
    #include <sys/fcntl.h>
    
    #ifndef _KERNEL
    #include <stdbool.h>
    #endif
    
    #define CAPRIGHT(idx, bit)      ((1ULL << (57 + (idx))) | (bit))
    
    /*
     * Possible rights on capabilities.
     *
     * Notes:
     * Some system calls don't require a capability in order to perform an
     * operation on an fd.  These include: close, dup, dup2.
     *
     * sendfile is authorized using CAP_READ on the file and CAP_WRITE on the
     * socket.
     *
     * mmap() and aio*() system calls will need special attention as they may
     * involve reads or writes depending a great deal on context.
     */
    
    /* INDEX 0 */
    
    /*
     * General file I/O.
     */
    /* Allows for openat(O_RDONLY), read(2), readv(2). */
    #define CAP_READ                CAPRIGHT(0, 0x0000000000000001ULL)
    /* Allows for openat(O_WRONLY | O_APPEND), write(2), writev(2). */
    #define CAP_WRITE               CAPRIGHT(0, 0x0000000000000002ULL)
    /* Allows for lseek(fd, 0, SEEK_CUR). */
    #define CAP_SEEK_TELL           CAPRIGHT(0, 0x0000000000000004ULL)
    /* Allows for lseek(2). */
    #define CAP_SEEK                (CAP_SEEK_TELL | 0x0000000000000008ULL)
    /* Allows for aio_read(2), pread(2), preadv(2). */
    #define CAP_PREAD               (CAP_SEEK | CAP_READ)
    /*
     * Allows for aio_write(2), openat(O_WRONLY) (without O_APPEND), pwrite(2),
     * pwritev(2).
     */
    #define CAP_PWRITE              (CAP_SEEK | CAP_WRITE)
    /* Allows for mmap(PROT_NONE). */
    #define CAP_MMAP                CAPRIGHT(0, 0x0000000000000010ULL)
    /* Allows for mmap(PROT_READ). */
    #define CAP_MMAP_R              (CAP_MMAP | CAP_SEEK | CAP_READ)
    /* Allows for mmap(PROT_WRITE). */
    #define CAP_MMAP_W              (CAP_MMAP | CAP_SEEK | CAP_WRITE)
    /* Allows for mmap(PROT_EXEC). */
    #define CAP_MMAP_X              (CAP_MMAP | CAP_SEEK | 0x0000000000000020ULL)
    /* Allows for mmap(PROT_READ | PROT_WRITE). */
   #define CAP_MMAP_RW             (CAP_MMAP_R | CAP_MMAP_W)
   /* Allows for mmap(PROT_READ | PROT_EXEC). */
   #define CAP_MMAP_RX             (CAP_MMAP_R | CAP_MMAP_X)
   /* Allows for mmap(PROT_WRITE | PROT_EXEC). */
   #define CAP_MMAP_WX             (CAP_MMAP_W | CAP_MMAP_X)
   /* Allows for mmap(PROT_READ | PROT_WRITE | PROT_EXEC). */
   #define CAP_MMAP_RWX            (CAP_MMAP_R | CAP_MMAP_W | CAP_MMAP_X)
   /* Allows for openat(O_CREAT). */
   #define CAP_CREATE              CAPRIGHT(0, 0x0000000000000040ULL)
   /* Allows for openat(O_EXEC) and fexecve(2) in turn. */
   #define CAP_FEXECVE             CAPRIGHT(0, 0x0000000000000080ULL)
   /* Allows for openat(O_SYNC), openat(O_FSYNC), fsync(2), aio_fsync(2). */
   #define CAP_FSYNC               CAPRIGHT(0, 0x0000000000000100ULL)
   /* Allows for openat(O_TRUNC), ftruncate(2). */
   #define CAP_FTRUNCATE           CAPRIGHT(0, 0x0000000000000200ULL)
   
   /* Lookups - used to constrain *at() calls. */
   #define CAP_LOOKUP              CAPRIGHT(0, 0x0000000000000400ULL)
   
   /* VFS methods. */
   /* Allows for fchdir(2). */
   #define CAP_FCHDIR              CAPRIGHT(0, 0x0000000000000800ULL)
   /* Allows for fchflags(2). */
   #define CAP_FCHFLAGS            CAPRIGHT(0, 0x0000000000001000ULL)
   /* Allows for fchflags(2) and chflagsat(2). */
   #define CAP_CHFLAGSAT           (CAP_FCHFLAGS | CAP_LOOKUP)
   /* Allows for fchmod(2). */
   #define CAP_FCHMOD              CAPRIGHT(0, 0x0000000000002000ULL)
   /* Allows for fchmod(2) and fchmodat(2). */
   #define CAP_FCHMODAT            (CAP_FCHMOD | CAP_LOOKUP)
   /* Allows for fchown(2). */
   #define CAP_FCHOWN              CAPRIGHT(0, 0x0000000000004000ULL)
   /* Allows for fchown(2) and fchownat(2). */
   #define CAP_FCHOWNAT            (CAP_FCHOWN | CAP_LOOKUP)
   /* Allows for fcntl(2). */
   #define CAP_FCNTL               CAPRIGHT(0, 0x0000000000008000ULL)
   /*
    * Allows for flock(2), openat(O_SHLOCK), openat(O_EXLOCK),
    * fcntl(F_SETLK_REMOTE), fcntl(F_SETLKW), fcntl(F_SETLK), fcntl(F_GETLK).
    */
   #define CAP_FLOCK               CAPRIGHT(0, 0x0000000000010000ULL)
   /* Allows for fpathconf(2). */
   #define CAP_FPATHCONF           CAPRIGHT(0, 0x0000000000020000ULL)
   /* Allows for UFS background-fsck operations. */
   #define CAP_FSCK                CAPRIGHT(0, 0x0000000000040000ULL)
   /* Allows for fstat(2). */
   #define CAP_FSTAT               CAPRIGHT(0, 0x0000000000080000ULL)
   /* Allows for fstat(2), fstatat(2) and faccessat(2). */
   #define CAP_FSTATAT             (CAP_FSTAT | CAP_LOOKUP)
   /* Allows for fstatfs(2). */
   #define CAP_FSTATFS             CAPRIGHT(0, 0x0000000000100000ULL)
   /* Allows for futimens(2) and futimes(2). */
   #define CAP_FUTIMES             CAPRIGHT(0, 0x0000000000200000ULL)
   /* Allows for futimens(2), futimes(2), futimesat(2) and utimensat(2). */
   #define CAP_FUTIMESAT           (CAP_FUTIMES | CAP_LOOKUP)
   /* Allows for linkat(2) (target directory descriptor). */
   #define CAP_LINKAT_TARGET       (CAP_LOOKUP | 0x0000000000400000ULL)
   /* Allows for mkdirat(2). */
   #define CAP_MKDIRAT             (CAP_LOOKUP | 0x0000000000800000ULL)
   /* Allows for mkfifoat(2). */
   #define CAP_MKFIFOAT            (CAP_LOOKUP | 0x0000000001000000ULL)
   /* Allows for mknodat(2). */
   #define CAP_MKNODAT             (CAP_LOOKUP | 0x0000000002000000ULL)
   /* Allows for renameat(2) (source directory descriptor). */
   #define CAP_RENAMEAT_SOURCE     (CAP_LOOKUP | 0x0000000004000000ULL)
   /* Allows for symlinkat(2). */
   #define CAP_SYMLINKAT           (CAP_LOOKUP | 0x0000000008000000ULL)
   /*
    * Allows for unlinkat(2) and renameat(2) if destination object exists and
    * will be removed.
    */
   #define CAP_UNLINKAT            (CAP_LOOKUP | 0x0000000010000000ULL)
   
   /* Socket operations. */
   /* Allows for accept(2) and accept4(2). */
   #define CAP_ACCEPT              CAPRIGHT(0, 0x0000000020000000ULL)
   /* Allows for bind(2). */
   #define CAP_BIND                CAPRIGHT(0, 0x0000000040000000ULL)
   /* Allows for connect(2). */
   #define CAP_CONNECT             CAPRIGHT(0, 0x0000000080000000ULL)
   /* Allows for getpeername(2). */
   #define CAP_GETPEERNAME         CAPRIGHT(0, 0x0000000100000000ULL)
   /* Allows for getsockname(2). */
   #define CAP_GETSOCKNAME         CAPRIGHT(0, 0x0000000200000000ULL)
   /* Allows for getsockopt(2). */
   #define CAP_GETSOCKOPT          CAPRIGHT(0, 0x0000000400000000ULL)
   /* Allows for listen(2). */
   #define CAP_LISTEN              CAPRIGHT(0, 0x0000000800000000ULL)
   /* Allows for sctp_peeloff(2). */
   #define CAP_PEELOFF             CAPRIGHT(0, 0x0000001000000000ULL)
   #define CAP_RECV                CAP_READ
   #define CAP_SEND                CAP_WRITE
   /* Allows for setsockopt(2). */
   #define CAP_SETSOCKOPT          CAPRIGHT(0, 0x0000002000000000ULL)
   /* Allows for shutdown(2). */
   #define CAP_SHUTDOWN            CAPRIGHT(0, 0x0000004000000000ULL)
   
   /* Allows for bindat(2) on a directory descriptor. */
   #define CAP_BINDAT              (CAP_LOOKUP | 0x0000008000000000ULL)
   /* Allows for connectat(2) on a directory descriptor. */
   #define CAP_CONNECTAT           (CAP_LOOKUP | 0x0000010000000000ULL)
   
   /* Allows for linkat(2) (source directory descriptor). */
   #define CAP_LINKAT_SOURCE       (CAP_LOOKUP | 0x0000020000000000ULL)
   /* Allows for renameat(2) (target directory descriptor). */
   #define CAP_RENAMEAT_TARGET     (CAP_LOOKUP | 0x0000040000000000ULL)
   
   #define CAP_SOCK_CLIENT \
           (CAP_CONNECT | CAP_GETPEERNAME | CAP_GETSOCKNAME | CAP_GETSOCKOPT | \
            CAP_PEELOFF | CAP_RECV | CAP_SEND | CAP_SETSOCKOPT | CAP_SHUTDOWN)
   #define CAP_SOCK_SERVER \
           (CAP_ACCEPT | CAP_BIND | CAP_GETPEERNAME | CAP_GETSOCKNAME | \
            CAP_GETSOCKOPT | CAP_LISTEN | CAP_PEELOFF | CAP_RECV | CAP_SEND | \
            CAP_SETSOCKOPT | CAP_SHUTDOWN)
   
   /* All used bits for index 0. */
   #define CAP_ALL0                CAPRIGHT(0, 0x000007FFFFFFFFFFULL)
   
   /* Available bits for index 0. */
   #define CAP_UNUSED0_44          CAPRIGHT(0, 0x0000080000000000ULL)
   /* ... */
   #define CAP_UNUSED0_57          CAPRIGHT(0, 0x0100000000000000ULL)
   
   /* INDEX 1 */
   
   /* Mandatory Access Control. */
   /* Allows for mac_get_fd(3). */
   #define CAP_MAC_GET             CAPRIGHT(1, 0x0000000000000001ULL)
   /* Allows for mac_set_fd(3). */
   #define CAP_MAC_SET             CAPRIGHT(1, 0x0000000000000002ULL)
   
   /* Methods on semaphores. */
   #define CAP_SEM_GETVALUE        CAPRIGHT(1, 0x0000000000000004ULL)
   #define CAP_SEM_POST            CAPRIGHT(1, 0x0000000000000008ULL)
   #define CAP_SEM_WAIT            CAPRIGHT(1, 0x0000000000000010ULL)
   
   /* Allows select(2) and poll(2) on descriptor. */
   #define CAP_EVENT               CAPRIGHT(1, 0x0000000000000020ULL)
   /* Allows for kevent(2) on kqueue descriptor with eventlist != NULL. */
   #define CAP_KQUEUE_EVENT        CAPRIGHT(1, 0x0000000000000040ULL)
   
   /* Strange and powerful rights that should not be given lightly. */
   /* Allows for ioctl(2). */
   #define CAP_IOCTL               CAPRIGHT(1, 0x0000000000000080ULL)
   #define CAP_TTYHOOK             CAPRIGHT(1, 0x0000000000000100ULL)
   
   /* Process management via process descriptors. */
   /* Allows for pdgetpid(2). */
   #define CAP_PDGETPID            CAPRIGHT(1, 0x0000000000000200ULL)
   /*
    * Allows for pdwait4(2).
    *
    * XXX: this constant was imported unused, but is targeted to be implemented
    *      in the future (bug 235871).
    */
   #define CAP_PDWAIT              CAPRIGHT(1, 0x0000000000000400ULL)
   /* Allows for pdkill(2). */
   #define CAP_PDKILL              CAPRIGHT(1, 0x0000000000000800ULL)
   
   /* Extended attributes. */
   /* Allows for extattr_delete_fd(2). */
   #define CAP_EXTATTR_DELETE      CAPRIGHT(1, 0x0000000000001000ULL)
   /* Allows for extattr_get_fd(2). */
   #define CAP_EXTATTR_GET         CAPRIGHT(1, 0x0000000000002000ULL)
   /* Allows for extattr_list_fd(2). */
   #define CAP_EXTATTR_LIST        CAPRIGHT(1, 0x0000000000004000ULL)
   /* Allows for extattr_set_fd(2). */
   #define CAP_EXTATTR_SET         CAPRIGHT(1, 0x0000000000008000ULL)
   
   /* Access Control Lists. */
   /* Allows for acl_valid_fd_np(3). */
   #define CAP_ACL_CHECK           CAPRIGHT(1, 0x0000000000010000ULL)
   /* Allows for acl_delete_fd_np(3). */
   #define CAP_ACL_DELETE          CAPRIGHT(1, 0x0000000000020000ULL)
   /* Allows for acl_get_fd(3) and acl_get_fd_np(3). */
   #define CAP_ACL_GET             CAPRIGHT(1, 0x0000000000040000ULL)
   /* Allows for acl_set_fd(3) and acl_set_fd_np(3). */
   #define CAP_ACL_SET             CAPRIGHT(1, 0x0000000000080000ULL)
   
   /* Allows for kevent(2) on kqueue descriptor with changelist != NULL. */
   #define CAP_KQUEUE_CHANGE       CAPRIGHT(1, 0x0000000000100000ULL)
   
   #define CAP_KQUEUE              (CAP_KQUEUE_EVENT | CAP_KQUEUE_CHANGE)
   
   /* All used bits for index 1. */
   #define CAP_ALL1                CAPRIGHT(1, 0x00000000001FFFFFULL)
   
   /* Available bits for index 1. */
   #define CAP_UNUSED1_22          CAPRIGHT(1, 0x0000000000200000ULL)
   /* ... */
   #define CAP_UNUSED1_57          CAPRIGHT(1, 0x0100000000000000ULL)
   
   /* Backward compatibility. */
   #define CAP_POLL_EVENT          CAP_EVENT
   
   #define CAP_ALL(rights)         do {                                    \
           (rights)->cr_rights[0] =                                        \
               ((uint64_t)CAP_RIGHTS_VERSION << 62) | CAP_ALL0;            \
           (rights)->cr_rights[1] = CAP_ALL1;                              \
   } while (0)
   
   #define CAP_NONE(rights)        do {                                    \
           (rights)->cr_rights[0] =                                        \
               ((uint64_t)CAP_RIGHTS_VERSION << 62) | CAPRIGHT(0, 0ULL);   \
           (rights)->cr_rights[1] = CAPRIGHT(1, 0ULL);                     \
   } while (0)
   
   #define CAPRVER(right)          ((int)((right) >> 62))
   #define CAPVER(rights)          CAPRVER((rights)->cr_rights[0])
   #define CAPARSIZE(rights)       (CAPVER(rights) + 2)
   #define CAPIDXBIT(right)        ((int)(((right) >> 57) & 0x1F))
   
   /*
    * Allowed fcntl(2) commands.
    */
   #define CAP_FCNTL_GETFL         (1 << F_GETFL)
   #define CAP_FCNTL_SETFL         (1 << F_SETFL)
   #define CAP_FCNTL_GETOWN        (1 << F_GETOWN)
   #define CAP_FCNTL_SETOWN        (1 << F_SETOWN)
   #define CAP_FCNTL_ALL           (CAP_FCNTL_GETFL | CAP_FCNTL_SETFL | \
                                    CAP_FCNTL_GETOWN | CAP_FCNTL_SETOWN)
   
   #define CAP_IOCTLS_ALL  SSIZE_MAX
   
   __BEGIN_DECLS
   
   #define cap_rights_init(...)                                            \
           __cap_rights_init(CAP_RIGHTS_VERSION, __VA_ARGS__, 0ULL)
   cap_rights_t *__cap_rights_init(int version, cap_rights_t *rights, ...);
   
   #define cap_rights_set(...)                                             \
           __cap_rights_set(__VA_ARGS__, 0ULL)
   cap_rights_t *__cap_rights_set(cap_rights_t *rights, ...);
   
   #define cap_rights_clear(...)                                           \
           __cap_rights_clear(__VA_ARGS__, 0ULL)
   cap_rights_t *__cap_rights_clear(cap_rights_t *rights, ...);
   
   #define cap_rights_is_set(...)                                          \
           __cap_rights_is_set(__VA_ARGS__, 0ULL)
   bool __cap_rights_is_set(const cap_rights_t *rights, ...);
   
   bool cap_rights_is_valid(const cap_rights_t *rights);
   cap_rights_t *cap_rights_merge(cap_rights_t *dst, const cap_rights_t *src);
   cap_rights_t *cap_rights_remove(cap_rights_t *dst, const cap_rights_t *src);
   bool cap_rights_contains(const cap_rights_t *big, const cap_rights_t *little);
   
   __END_DECLS
   
   #ifdef _KERNEL
   
   #include <sys/systm.h>
   extern cap_rights_t cap_accept_rights;
   extern cap_rights_t cap_bind_rights;
   extern cap_rights_t cap_connect_rights;
   extern cap_rights_t cap_event_rights;
   extern cap_rights_t cap_fchdir_rights;
   extern cap_rights_t cap_fchflags_rights;
   extern cap_rights_t cap_fchmod_rights;
   extern cap_rights_t cap_fchown_rights;
   extern cap_rights_t cap_fcntl_rights;
   extern cap_rights_t cap_fexecve_rights;
   extern cap_rights_t cap_flock_rights;
   extern cap_rights_t cap_fpathconf_rights;
   extern cap_rights_t cap_fstat_rights;
   extern cap_rights_t cap_fstatfs_rights;
   extern cap_rights_t cap_fsync_rights;
   extern cap_rights_t cap_ftruncate_rights;
   extern cap_rights_t cap_futimes_rights;
   extern cap_rights_t cap_getpeername_rights;
   extern cap_rights_t cap_getsockopt_rights;
   extern cap_rights_t cap_getsockname_rights;
   extern cap_rights_t cap_ioctl_rights;
   extern cap_rights_t cap_linkat_source_rights;
   extern cap_rights_t cap_linkat_target_rights;
   extern cap_rights_t cap_listen_rights;
   extern cap_rights_t cap_mkdirat_rights;
   extern cap_rights_t cap_mkfifoat_rights;
   extern cap_rights_t cap_mknodat_rights;
   extern cap_rights_t cap_mmap_rights;
   extern cap_rights_t cap_no_rights;
   extern cap_rights_t cap_pdgetpid_rights;
   extern cap_rights_t cap_pdkill_rights;
   extern cap_rights_t cap_pread_rights;
   extern cap_rights_t cap_pwrite_rights;
   extern cap_rights_t cap_read_rights;
   extern cap_rights_t cap_recv_rights;
   extern cap_rights_t cap_renameat_source_rights;
   extern cap_rights_t cap_renameat_target_rights;
   extern cap_rights_t cap_seek_rights;
   extern cap_rights_t cap_send_rights;
   extern cap_rights_t cap_send_connect_rights;
   extern cap_rights_t cap_setsockopt_rights;
   extern cap_rights_t cap_shutdown_rights;
   extern cap_rights_t cap_symlinkat_rights;
   extern cap_rights_t cap_unlinkat_rights;
   extern cap_rights_t cap_write_rights;
   
   #define IN_CAPABILITY_MODE(td) (((td)->td_ucred->cr_flags & CRED_FLAG_CAPMODE) != 0)
   
   struct filedesc;
   struct filedescent;
   
   /*
    * Test whether a capability grants the requested rights.
    */
   int     cap_check(const cap_rights_t *havep, const cap_rights_t *needp);
   /*
    * Convert capability rights into VM access flags.
    */
   vm_prot_t       cap_rights_to_vmprot(const cap_rights_t *havep);
   
   /*
    * For the purposes of procstat(1) and similar tools, allow kern_descrip.c to
    * extract the rights from a capability.
    *
    * Dereferencing fdep requires filedesc.h, but including it would cause
    * significant pollution. Instead add a macro for consumers which want it,
    * most notably kern_descrip.c.
    */
   #define cap_rights_fde_inline(fdep)     (&(fdep)->fde_rights)
   
   const cap_rights_t      *cap_rights_fde(const struct filedescent *fde);
   const cap_rights_t      *cap_rights(struct filedesc *fdp, int fd);
   
   int     cap_ioctl_check(struct filedesc *fdp, int fd, u_long cmd);
   int     cap_fcntl_check_fde(struct filedescent *fde, int cmd);
   int     cap_fcntl_check(struct filedesc *fdp, int fd, int cmd);
   
   extern bool trap_enotcap;
   
   #else /* !_KERNEL */
   
   __BEGIN_DECLS
   /*
    * cap_enter(): Cause the process to enter capability mode, which will
    * prevent it from directly accessing global namespaces.  System calls will
    * be limited to process-local, process-inherited, or file descriptor
    * operations.  If already in capability mode, a no-op.
    */
   int     cap_enter(void);
   
   /*
    * Are we sandboxed (in capability mode)?
    * This is a libc wrapper around the cap_getmode(2) system call.
    */
   bool    cap_sandboxed(void);
   
   /*
    * cap_getmode(): Are we in capability mode?
    */
   int     cap_getmode(u_int *modep);
   
   /*
    * Limits capability rights for the given descriptor (CAP_*).
    */
   int cap_rights_limit(int fd, const cap_rights_t *rights);
   /*
    * Returns capability rights for the given descriptor.
    */
   #define cap_rights_get(fd, rights)                                      \
           __cap_rights_get(CAP_RIGHTS_VERSION, (fd), (rights))
   int __cap_rights_get(int version, int fd, cap_rights_t *rights);
   /*
    * Limits allowed ioctls for the given descriptor.
    */
   int cap_ioctls_limit(int fd, const cap_ioctl_t *cmds, size_t ncmds);
   /*
    * Returns array of allowed ioctls for the given descriptor.
    * If all ioctls are allowed, the cmds array is not populated and
    * the function returns CAP_IOCTLS_ALL.
    */
   ssize_t cap_ioctls_get(int fd, cap_ioctl_t *cmds, size_t maxcmds);
   /*
    * Limits allowed fcntls for the given descriptor (CAP_FCNTL_*).
    */
   int cap_fcntls_limit(int fd, uint32_t fcntlrights);
   /*
    * Returns bitmask of allowed fcntls for the given descriptor.
    */
   int cap_fcntls_get(int fd, uint32_t *fcntlrightsp);
   
   __END_DECLS
   
   #endif /* !_KERNEL */
   
   #endif /* !_SYS_CAPSICUM_H_ */

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