The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/sys/capability.h

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    1 /*-
    2  * Copyright (c) 2008-2010 Robert N. M. Watson
    3  * Copyright (c) 2012 FreeBSD Foundation
    4  * All rights reserved.
    5  *
    6  * This software was developed at the University of Cambridge Computer
    7  * Laboratory with support from a grant from Google, Inc.
    8  *
    9  * Portions of this software were developed by Pawel Jakub Dawidek under
   10  * sponsorship from the FreeBSD Foundation.
   11  *
   12  * Redistribution and use in source and binary forms, with or without
   13  * modification, are permitted provided that the following conditions
   14  * are met:
   15  * 1. Redistributions of source code must retain the above copyright
   16  *    notice, this list of conditions and the following disclaimer.
   17  * 2. Redistributions in binary form must reproduce the above copyright
   18  *    notice, this list of conditions and the following disclaimer in the
   19  *    documentation and/or other materials provided with the distribution.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  *
   33  * $FreeBSD: releng/10.1/sys/sys/capability.h 273137 2014-10-15 16:54:18Z mjg $
   34  */
   35 
   36 /*
   37  * Definitions for FreeBSD capabilities facility.
   38  */
   39 #ifndef _SYS_CAPABILITY_H_
   40 #define _SYS_CAPABILITY_H_
   41 
   42 #include <sys/cdefs.h>
   43 #include <sys/param.h>
   44 
   45 #include <sys/caprights.h>
   46 #include <sys/file.h>
   47 #include <sys/fcntl.h>
   48 
   49 #ifndef _KERNEL
   50 #include <stdbool.h>
   51 #endif
   52 
   53 #define CAPRIGHT(idx, bit)      ((1ULL << (57 + (idx))) | (bit))
   54 
   55 /*
   56  * Possible rights on capabilities.
   57  *
   58  * Notes:
   59  * Some system calls don't require a capability in order to perform an
   60  * operation on an fd.  These include: close, dup, dup2.
   61  *
   62  * sendfile is authorized using CAP_READ on the file and CAP_WRITE on the
   63  * socket.
   64  *
   65  * mmap() and aio*() system calls will need special attention as they may
   66  * involve reads or writes depending a great deal on context.
   67  */
   68 
   69 /* INDEX 0 */
   70 
   71 /*
   72  * General file I/O.
   73  */
   74 /* Allows for openat(O_RDONLY), read(2), readv(2). */
   75 #define CAP_READ                CAPRIGHT(0, 0x0000000000000001ULL)
   76 /* Allows for openat(O_WRONLY | O_APPEND), write(2), writev(2). */
   77 #define CAP_WRITE               CAPRIGHT(0, 0x0000000000000002ULL)
   78 /* Allows for lseek(fd, 0, SEEK_CUR). */
   79 #define CAP_SEEK_TELL           CAPRIGHT(0, 0x0000000000000004ULL)
   80 /* Allows for lseek(2). */
   81 #define CAP_SEEK                (CAP_SEEK_TELL | 0x0000000000000008ULL)
   82 /* Allows for aio_read(2), pread(2), preadv(2). */
   83 #define CAP_PREAD               (CAP_SEEK | CAP_READ)
   84 /*
   85  * Allows for aio_write(2), openat(O_WRONLY) (without O_APPEND), pwrite(2),
   86  * pwritev(2).
   87  */
   88 #define CAP_PWRITE              (CAP_SEEK | CAP_WRITE)
   89 /* Allows for mmap(PROT_NONE). */
   90 #define CAP_MMAP                CAPRIGHT(0, 0x0000000000000010ULL)
   91 /* Allows for mmap(PROT_READ). */
   92 #define CAP_MMAP_R              (CAP_MMAP | CAP_SEEK | CAP_READ)
   93 /* Allows for mmap(PROT_WRITE). */
   94 #define CAP_MMAP_W              (CAP_MMAP | CAP_SEEK | CAP_WRITE)
   95 /* Allows for mmap(PROT_EXEC). */
   96 #define CAP_MMAP_X              (CAP_MMAP | CAP_SEEK | 0x0000000000000020ULL)
   97 /* Allows for mmap(PROT_READ | PROT_WRITE). */
   98 #define CAP_MMAP_RW             (CAP_MMAP_R | CAP_MMAP_W)
   99 /* Allows for mmap(PROT_READ | PROT_EXEC). */
  100 #define CAP_MMAP_RX             (CAP_MMAP_R | CAP_MMAP_X)
  101 /* Allows for mmap(PROT_WRITE | PROT_EXEC). */
  102 #define CAP_MMAP_WX             (CAP_MMAP_W | CAP_MMAP_X)
  103 /* Allows for mmap(PROT_READ | PROT_WRITE | PROT_EXEC). */
  104 #define CAP_MMAP_RWX            (CAP_MMAP_R | CAP_MMAP_W | CAP_MMAP_X)
  105 /* Allows for openat(O_CREAT). */
  106 #define CAP_CREATE              CAPRIGHT(0, 0x0000000000000040ULL)
  107 /* Allows for openat(O_EXEC) and fexecve(2) in turn. */
  108 #define CAP_FEXECVE             CAPRIGHT(0, 0x0000000000000080ULL)
  109 /* Allows for openat(O_SYNC), openat(O_FSYNC), fsync(2), aio_fsync(2). */
  110 #define CAP_FSYNC               CAPRIGHT(0, 0x0000000000000100ULL)
  111 /* Allows for openat(O_TRUNC), ftruncate(2). */
  112 #define CAP_FTRUNCATE           CAPRIGHT(0, 0x0000000000000200ULL)
  113 
  114 /* Lookups - used to constrain *at() calls. */
  115 #define CAP_LOOKUP              CAPRIGHT(0, 0x0000000000000400ULL)
  116 
  117 /* VFS methods. */
  118 /* Allows for fchdir(2). */
  119 #define CAP_FCHDIR              CAPRIGHT(0, 0x0000000000000800ULL)
  120 /* Allows for fchflags(2). */
  121 #define CAP_FCHFLAGS            CAPRIGHT(0, 0x0000000000001000ULL)
  122 /* Allows for fchflags(2) and chflagsat(2). */
  123 #define CAP_CHFLAGSAT           (CAP_FCHFLAGS | CAP_LOOKUP)
  124 /* Allows for fchmod(2). */
  125 #define CAP_FCHMOD              CAPRIGHT(0, 0x0000000000002000ULL)
  126 /* Allows for fchmod(2) and fchmodat(2). */
  127 #define CAP_FCHMODAT            (CAP_FCHMOD | CAP_LOOKUP)
  128 /* Allows for fchown(2). */
  129 #define CAP_FCHOWN              CAPRIGHT(0, 0x0000000000004000ULL)
  130 /* Allows for fchown(2) and fchownat(2). */
  131 #define CAP_FCHOWNAT            (CAP_FCHOWN | CAP_LOOKUP)
  132 /* Allows for fcntl(2). */
  133 #define CAP_FCNTL               CAPRIGHT(0, 0x0000000000008000ULL)
  134 /*
  135  * Allows for flock(2), openat(O_SHLOCK), openat(O_EXLOCK),
  136  * fcntl(F_SETLK_REMOTE), fcntl(F_SETLKW), fcntl(F_SETLK), fcntl(F_GETLK).
  137  */
  138 #define CAP_FLOCK               CAPRIGHT(0, 0x0000000000010000ULL)
  139 /* Allows for fpathconf(2). */
  140 #define CAP_FPATHCONF           CAPRIGHT(0, 0x0000000000020000ULL)
  141 /* Allows for UFS background-fsck operations. */
  142 #define CAP_FSCK                CAPRIGHT(0, 0x0000000000040000ULL)
  143 /* Allows for fstat(2). */
  144 #define CAP_FSTAT               CAPRIGHT(0, 0x0000000000080000ULL)
  145 /* Allows for fstat(2), fstatat(2) and faccessat(2). */
  146 #define CAP_FSTATAT             (CAP_FSTAT | CAP_LOOKUP)
  147 /* Allows for fstatfs(2). */
  148 #define CAP_FSTATFS             CAPRIGHT(0, 0x0000000000100000ULL)
  149 /* Allows for futimes(2). */
  150 #define CAP_FUTIMES             CAPRIGHT(0, 0x0000000000200000ULL)
  151 /* Allows for futimes(2) and futimesat(2). */
  152 #define CAP_FUTIMESAT           (CAP_FUTIMES | CAP_LOOKUP)
  153 /* Allows for linkat(2) and renameat(2) (destination directory descriptor). */
  154 #define CAP_LINKAT              (CAP_LOOKUP | 0x0000000000400000ULL)
  155 /* Allows for mkdirat(2). */
  156 #define CAP_MKDIRAT             (CAP_LOOKUP | 0x0000000000800000ULL)
  157 /* Allows for mkfifoat(2). */
  158 #define CAP_MKFIFOAT            (CAP_LOOKUP | 0x0000000001000000ULL)
  159 /* Allows for mknodat(2). */
  160 #define CAP_MKNODAT             (CAP_LOOKUP | 0x0000000002000000ULL)
  161 /* Allows for renameat(2). */
  162 #define CAP_RENAMEAT            (CAP_LOOKUP | 0x0000000004000000ULL)
  163 /* Allows for symlinkat(2). */
  164 #define CAP_SYMLINKAT           (CAP_LOOKUP | 0x0000000008000000ULL)
  165 /*
  166  * Allows for unlinkat(2) and renameat(2) if destination object exists and
  167  * will be removed.
  168  */
  169 #define CAP_UNLINKAT            (CAP_LOOKUP | 0x0000000010000000ULL)
  170 
  171 /* Socket operations. */
  172 /* Allows for accept(2) and accept4(2). */
  173 #define CAP_ACCEPT              CAPRIGHT(0, 0x0000000020000000ULL)
  174 /* Allows for bind(2). */
  175 #define CAP_BIND                CAPRIGHT(0, 0x0000000040000000ULL)
  176 /* Allows for connect(2). */
  177 #define CAP_CONNECT             CAPRIGHT(0, 0x0000000080000000ULL)
  178 /* Allows for getpeername(2). */
  179 #define CAP_GETPEERNAME         CAPRIGHT(0, 0x0000000100000000ULL)
  180 /* Allows for getsockname(2). */
  181 #define CAP_GETSOCKNAME         CAPRIGHT(0, 0x0000000200000000ULL)
  182 /* Allows for getsockopt(2). */
  183 #define CAP_GETSOCKOPT          CAPRIGHT(0, 0x0000000400000000ULL)
  184 /* Allows for listen(2). */
  185 #define CAP_LISTEN              CAPRIGHT(0, 0x0000000800000000ULL)
  186 /* Allows for sctp_peeloff(2). */
  187 #define CAP_PEELOFF             CAPRIGHT(0, 0x0000001000000000ULL)
  188 #define CAP_RECV                CAP_READ
  189 #define CAP_SEND                CAP_WRITE
  190 /* Allows for setsockopt(2). */
  191 #define CAP_SETSOCKOPT          CAPRIGHT(0, 0x0000002000000000ULL)
  192 /* Allows for shutdown(2). */
  193 #define CAP_SHUTDOWN            CAPRIGHT(0, 0x0000004000000000ULL)
  194 
  195 /* Allows for bindat(2) on a directory descriptor. */
  196 #define CAP_BINDAT              (CAP_LOOKUP | 0x0000008000000000ULL)
  197 /* Allows for connectat(2) on a directory descriptor. */
  198 #define CAP_CONNECTAT           (CAP_LOOKUP | 0x0000010000000000ULL)
  199 
  200 #define CAP_SOCK_CLIENT \
  201         (CAP_CONNECT | CAP_GETPEERNAME | CAP_GETSOCKNAME | CAP_GETSOCKOPT | \
  202          CAP_PEELOFF | CAP_RECV | CAP_SEND | CAP_SETSOCKOPT | CAP_SHUTDOWN)
  203 #define CAP_SOCK_SERVER \
  204         (CAP_ACCEPT | CAP_BIND | CAP_GETPEERNAME | CAP_GETSOCKNAME | \
  205          CAP_GETSOCKOPT | CAP_LISTEN | CAP_PEELOFF | CAP_RECV | CAP_SEND | \
  206          CAP_SETSOCKOPT | CAP_SHUTDOWN)
  207 
  208 /* All used bits for index 0. */
  209 #define CAP_ALL0                CAPRIGHT(0, 0x0000007FFFFFFFFFULL)
  210 
  211 /* Available bits for index 0. */
  212 #define CAP_UNUSED0_40          CAPRIGHT(0, 0x0000008000000000ULL)
  213 /* ... */
  214 #define CAP_UNUSED0_57          CAPRIGHT(0, 0x0100000000000000ULL)
  215 
  216 /* INDEX 1 */
  217 
  218 /* Mandatory Access Control. */
  219 /* Allows for mac_get_fd(3). */
  220 #define CAP_MAC_GET             CAPRIGHT(1, 0x0000000000000001ULL)
  221 /* Allows for mac_set_fd(3). */
  222 #define CAP_MAC_SET             CAPRIGHT(1, 0x0000000000000002ULL)
  223 
  224 /* Methods on semaphores. */
  225 #define CAP_SEM_GETVALUE        CAPRIGHT(1, 0x0000000000000004ULL)
  226 #define CAP_SEM_POST            CAPRIGHT(1, 0x0000000000000008ULL)
  227 #define CAP_SEM_WAIT            CAPRIGHT(1, 0x0000000000000010ULL)
  228 
  229 /* Allows select(2) and poll(2) on descriptor. */
  230 #define CAP_EVENT               CAPRIGHT(1, 0x0000000000000020ULL)
  231 /* Allows for kevent(2) on kqueue descriptor with eventlist != NULL. */
  232 #define CAP_KQUEUE_EVENT        CAPRIGHT(1, 0x0000000000000040ULL)
  233 
  234 /* Strange and powerful rights that should not be given lightly. */
  235 /* Allows for ioctl(2). */
  236 #define CAP_IOCTL               CAPRIGHT(1, 0x0000000000000080ULL)
  237 #define CAP_TTYHOOK             CAPRIGHT(1, 0x0000000000000100ULL)
  238 
  239 /* Process management via process descriptors. */
  240 /* Allows for pdgetpid(2). */
  241 #define CAP_PDGETPID            CAPRIGHT(1, 0x0000000000000200ULL)
  242 /* Allows for pdwait4(2). */
  243 #define CAP_PDWAIT              CAPRIGHT(1, 0x0000000000000400ULL)
  244 /* Allows for pdkill(2). */
  245 #define CAP_PDKILL              CAPRIGHT(1, 0x0000000000000800ULL)
  246 
  247 /* Extended attributes. */
  248 /* Allows for extattr_delete_fd(2). */
  249 #define CAP_EXTATTR_DELETE      CAPRIGHT(1, 0x0000000000001000ULL)
  250 /* Allows for extattr_get_fd(2). */
  251 #define CAP_EXTATTR_GET         CAPRIGHT(1, 0x0000000000002000ULL)
  252 /* Allows for extattr_list_fd(2). */
  253 #define CAP_EXTATTR_LIST        CAPRIGHT(1, 0x0000000000004000ULL)
  254 /* Allows for extattr_set_fd(2). */
  255 #define CAP_EXTATTR_SET         CAPRIGHT(1, 0x0000000000008000ULL)
  256 
  257 /* Access Control Lists. */
  258 /* Allows for acl_valid_fd_np(3). */
  259 #define CAP_ACL_CHECK           CAPRIGHT(1, 0x0000000000010000ULL)
  260 /* Allows for acl_delete_fd_np(3). */
  261 #define CAP_ACL_DELETE          CAPRIGHT(1, 0x0000000000020000ULL)
  262 /* Allows for acl_get_fd(3) and acl_get_fd_np(3). */
  263 #define CAP_ACL_GET             CAPRIGHT(1, 0x0000000000040000ULL)
  264 /* Allows for acl_set_fd(3) and acl_set_fd_np(3). */
  265 #define CAP_ACL_SET             CAPRIGHT(1, 0x0000000000080000ULL)
  266 
  267 /* Allows for kevent(2) on kqueue descriptor with changelist != NULL. */
  268 #define CAP_KQUEUE_CHANGE       CAPRIGHT(1, 0x0000000000100000ULL)
  269 
  270 #define CAP_KQUEUE              (CAP_KQUEUE_EVENT | CAP_KQUEUE_CHANGE)
  271 
  272 /* All used bits for index 1. */
  273 #define CAP_ALL1                CAPRIGHT(1, 0x00000000001FFFFFULL)
  274 
  275 /* Available bits for index 1. */
  276 #define CAP_UNUSED1_22          CAPRIGHT(1, 0x0000000000200000ULL)
  277 /* ... */
  278 #define CAP_UNUSED1_57          CAPRIGHT(1, 0x0100000000000000ULL)
  279 
  280 /* Backward compatibility. */
  281 #define CAP_POLL_EVENT          CAP_EVENT
  282 
  283 #define CAP_ALL(rights)         do {                                    \
  284         (rights)->cr_rights[0] =                                        \
  285             ((uint64_t)CAP_RIGHTS_VERSION << 62) | CAP_ALL0;            \
  286         (rights)->cr_rights[1] = CAP_ALL1;                              \
  287 } while (0)
  288 
  289 #define CAP_NONE(rights)        do {                                    \
  290         (rights)->cr_rights[0] =                                        \
  291             ((uint64_t)CAP_RIGHTS_VERSION << 62) | CAPRIGHT(0, 0ULL);   \
  292         (rights)->cr_rights[1] = CAPRIGHT(1, 0ULL);                     \
  293 } while (0)
  294 
  295 #define CAPRVER(right)          ((int)((right) >> 62))
  296 #define CAPVER(rights)          CAPRVER((rights)->cr_rights[0])
  297 #define CAPARSIZE(rights)       (CAPVER(rights) + 2)
  298 #define CAPIDXBIT(right)        ((int)(((right) >> 57) & 0x1F))
  299 
  300 /*
  301  * Allowed fcntl(2) commands.
  302  */
  303 #define CAP_FCNTL_GETFL         (1 << F_GETFL)
  304 #define CAP_FCNTL_SETFL         (1 << F_SETFL)
  305 #if __BSD_VISIBLE || __XSI_VISIBLE || __POSIX_VISIBLE >= 200112
  306 #define CAP_FCNTL_GETOWN        (1 << F_GETOWN)
  307 #define CAP_FCNTL_SETOWN        (1 << F_SETOWN)
  308 #endif
  309 #if __BSD_VISIBLE || __XSI_VISIBLE || __POSIX_VISIBLE >= 200112
  310 #define CAP_FCNTL_ALL           (CAP_FCNTL_GETFL | CAP_FCNTL_SETFL | \
  311                                  CAP_FCNTL_GETOWN | CAP_FCNTL_SETOWN)
  312 #else
  313 #define CAP_FCNTL_ALL           (CAP_FCNTL_GETFL | CAP_FCNTL_SETFL)
  314 #endif
  315 
  316 #define CAP_IOCTLS_ALL  SSIZE_MAX
  317 
  318 #define cap_rights_init(...)                                            \
  319         __cap_rights_init(CAP_RIGHTS_VERSION, __VA_ARGS__, 0ULL)
  320 cap_rights_t *__cap_rights_init(int version, cap_rights_t *rights, ...);
  321 
  322 #define cap_rights_set(rights, ...)                                     \
  323         __cap_rights_set((rights), __VA_ARGS__, 0ULL)
  324 cap_rights_t *__cap_rights_set(cap_rights_t *rights, ...);
  325 
  326 #define cap_rights_clear(rights, ...)                                   \
  327         __cap_rights_clear((rights), __VA_ARGS__, 0ULL)
  328 cap_rights_t *__cap_rights_clear(cap_rights_t *rights, ...);
  329 
  330 #define cap_rights_is_set(rights, ...)                                  \
  331         __cap_rights_is_set((rights), __VA_ARGS__, 0ULL)
  332 bool __cap_rights_is_set(const cap_rights_t *rights, ...);
  333 
  334 bool cap_rights_is_valid(const cap_rights_t *rights);
  335 cap_rights_t *cap_rights_merge(cap_rights_t *dst, const cap_rights_t *src);
  336 cap_rights_t *cap_rights_remove(cap_rights_t *dst, const cap_rights_t *src);
  337 bool cap_rights_contains(const cap_rights_t *big, const cap_rights_t *little);
  338 
  339 #ifdef _KERNEL
  340 
  341 #include <sys/systm.h>
  342 
  343 #define IN_CAPABILITY_MODE(td) ((td->td_ucred->cr_flags & CRED_FLAG_CAPMODE) != 0)
  344 
  345 struct filedesc;
  346 struct filedescent;
  347 
  348 /*
  349  * Test whether a capability grants the requested rights.
  350  */
  351 int     cap_check(const cap_rights_t *havep, const cap_rights_t *needp);
  352 /*
  353  * Convert capability rights into VM access flags.
  354  */
  355 u_char  cap_rights_to_vmprot(cap_rights_t *havep);
  356 
  357 /*
  358  * For the purposes of procstat(1) and similar tools, allow kern_descrip.c to
  359  * extract the rights from a capability.
  360  */
  361 cap_rights_t    *cap_rights_fde(struct filedescent *fde);
  362 cap_rights_t    *cap_rights(struct filedesc *fdp, int fd);
  363 
  364 int     cap_ioctl_check(struct filedesc *fdp, int fd, u_long cmd);
  365 int     cap_fcntl_check_fde(struct filedescent *fde, int cmd);
  366 int     cap_fcntl_check(struct filedesc *fdp, int fd, int cmd);
  367 
  368 #else /* !_KERNEL */
  369 
  370 __BEGIN_DECLS
  371 /*
  372  * cap_enter(): Cause the process to enter capability mode, which will
  373  * prevent it from directly accessing global namespaces.  System calls will
  374  * be limited to process-local, process-inherited, or file descriptor
  375  * operations.  If already in capability mode, a no-op.
  376  */
  377 int     cap_enter(void);
  378 
  379 /*
  380  * Are we sandboxed (in capability mode)?
  381  * This is a libc wrapper around the cap_getmode(2) system call.
  382  */
  383 bool    cap_sandboxed(void);
  384 
  385 /*
  386  * cap_getmode(): Are we in capability mode?
  387  */
  388 int     cap_getmode(u_int *modep);
  389 
  390 /*
  391  * Limits capability rights for the given descriptor (CAP_*).
  392  */
  393 int cap_rights_limit(int fd, const cap_rights_t *rights);
  394 /*
  395  * Returns capability rights for the given descriptor.
  396  */
  397 #define cap_rights_get(fd, rights)      __cap_rights_get(CAP_RIGHTS_VERSION, (fd), (rights))
  398 int __cap_rights_get(int version, int fd, cap_rights_t *rightsp);
  399 /*
  400  * Limits allowed ioctls for the given descriptor.
  401  */
  402 int cap_ioctls_limit(int fd, const unsigned long *cmds, size_t ncmds);
  403 /*
  404  * Returns array of allowed ioctls for the given descriptor.
  405  * If all ioctls are allowed, the cmds array is not populated and
  406  * the function returns CAP_IOCTLS_ALL.
  407  */
  408 ssize_t cap_ioctls_get(int fd, unsigned long *cmds, size_t maxcmds);
  409 /*
  410  * Limits allowed fcntls for the given descriptor (CAP_FCNTL_*).
  411  */
  412 int cap_fcntls_limit(int fd, uint32_t fcntlrights);
  413 /*
  414  * Returns bitmask of allowed fcntls for the given descriptor.
  415  */
  416 int cap_fcntls_get(int fd, uint32_t *fcntlrightsp);
  417 
  418 __END_DECLS
  419 
  420 #endif /* !_KERNEL */
  421 
  422 #endif /* !_SYS_CAPABILITY_H_ */

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