The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*-
    2  * Copyright (c) 2008-2010, 2015 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/11.1/sys/sys/capsicum.h 306398 2016-09-28 09:28:26Z kib $
   34  */
   35 
   36 /*
   37  * Definitions for FreeBSD capabilities facility.
   38  */
   39 #ifndef _SYS_CAPSICUM_H_
   40 #define _SYS_CAPSICUM_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 futimens(2) and futimes(2). */
  150 #define CAP_FUTIMES             CAPRIGHT(0, 0x0000000000200000ULL)
  151 /* Allows for futimens(2), futimes(2), futimesat(2) and utimensat(2). */
  152 #define CAP_FUTIMESAT           (CAP_FUTIMES | CAP_LOOKUP)
  153 /* Allows for linkat(2) (target directory descriptor). */
  154 #define CAP_LINKAT_TARGET       (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) (source directory descriptor). */
  162 #define CAP_RENAMEAT_SOURCE     (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 /* Allows for linkat(2) (source directory descriptor). */
  201 #define CAP_LINKAT_SOURCE       (CAP_LOOKUP | 0x0000020000000000ULL)
  202 /* Allows for renameat(2) (target directory descriptor). */
  203 #define CAP_RENAMEAT_TARGET     (CAP_LOOKUP | 0x0000040000000000ULL)
  204 
  205 #define CAP_SOCK_CLIENT \
  206         (CAP_CONNECT | CAP_GETPEERNAME | CAP_GETSOCKNAME | CAP_GETSOCKOPT | \
  207          CAP_PEELOFF | CAP_RECV | CAP_SEND | CAP_SETSOCKOPT | CAP_SHUTDOWN)
  208 #define CAP_SOCK_SERVER \
  209         (CAP_ACCEPT | CAP_BIND | CAP_GETPEERNAME | CAP_GETSOCKNAME | \
  210          CAP_GETSOCKOPT | CAP_LISTEN | CAP_PEELOFF | CAP_RECV | CAP_SEND | \
  211          CAP_SETSOCKOPT | CAP_SHUTDOWN)
  212 
  213 /* All used bits for index 0. */
  214 #define CAP_ALL0                CAPRIGHT(0, 0x000007FFFFFFFFFFULL)
  215 
  216 /* Available bits for index 0. */
  217 #define CAP_UNUSED0_44          CAPRIGHT(0, 0x0000080000000000ULL)
  218 /* ... */
  219 #define CAP_UNUSED0_57          CAPRIGHT(0, 0x0100000000000000ULL)
  220 
  221 /* INDEX 1 */
  222 
  223 /* Mandatory Access Control. */
  224 /* Allows for mac_get_fd(3). */
  225 #define CAP_MAC_GET             CAPRIGHT(1, 0x0000000000000001ULL)
  226 /* Allows for mac_set_fd(3). */
  227 #define CAP_MAC_SET             CAPRIGHT(1, 0x0000000000000002ULL)
  228 
  229 /* Methods on semaphores. */
  230 #define CAP_SEM_GETVALUE        CAPRIGHT(1, 0x0000000000000004ULL)
  231 #define CAP_SEM_POST            CAPRIGHT(1, 0x0000000000000008ULL)
  232 #define CAP_SEM_WAIT            CAPRIGHT(1, 0x0000000000000010ULL)
  233 
  234 /* Allows select(2) and poll(2) on descriptor. */
  235 #define CAP_EVENT               CAPRIGHT(1, 0x0000000000000020ULL)
  236 /* Allows for kevent(2) on kqueue descriptor with eventlist != NULL. */
  237 #define CAP_KQUEUE_EVENT        CAPRIGHT(1, 0x0000000000000040ULL)
  238 
  239 /* Strange and powerful rights that should not be given lightly. */
  240 /* Allows for ioctl(2). */
  241 #define CAP_IOCTL               CAPRIGHT(1, 0x0000000000000080ULL)
  242 #define CAP_TTYHOOK             CAPRIGHT(1, 0x0000000000000100ULL)
  243 
  244 /* Process management via process descriptors. */
  245 /* Allows for pdgetpid(2). */
  246 #define CAP_PDGETPID            CAPRIGHT(1, 0x0000000000000200ULL)
  247 /* Allows for pdwait4(2). */
  248 #define CAP_PDWAIT              CAPRIGHT(1, 0x0000000000000400ULL)
  249 /* Allows for pdkill(2). */
  250 #define CAP_PDKILL              CAPRIGHT(1, 0x0000000000000800ULL)
  251 
  252 /* Extended attributes. */
  253 /* Allows for extattr_delete_fd(2). */
  254 #define CAP_EXTATTR_DELETE      CAPRIGHT(1, 0x0000000000001000ULL)
  255 /* Allows for extattr_get_fd(2). */
  256 #define CAP_EXTATTR_GET         CAPRIGHT(1, 0x0000000000002000ULL)
  257 /* Allows for extattr_list_fd(2). */
  258 #define CAP_EXTATTR_LIST        CAPRIGHT(1, 0x0000000000004000ULL)
  259 /* Allows for extattr_set_fd(2). */
  260 #define CAP_EXTATTR_SET         CAPRIGHT(1, 0x0000000000008000ULL)
  261 
  262 /* Access Control Lists. */
  263 /* Allows for acl_valid_fd_np(3). */
  264 #define CAP_ACL_CHECK           CAPRIGHT(1, 0x0000000000010000ULL)
  265 /* Allows for acl_delete_fd_np(3). */
  266 #define CAP_ACL_DELETE          CAPRIGHT(1, 0x0000000000020000ULL)
  267 /* Allows for acl_get_fd(3) and acl_get_fd_np(3). */
  268 #define CAP_ACL_GET             CAPRIGHT(1, 0x0000000000040000ULL)
  269 /* Allows for acl_set_fd(3) and acl_set_fd_np(3). */
  270 #define CAP_ACL_SET             CAPRIGHT(1, 0x0000000000080000ULL)
  271 
  272 /* Allows for kevent(2) on kqueue descriptor with changelist != NULL. */
  273 #define CAP_KQUEUE_CHANGE       CAPRIGHT(1, 0x0000000000100000ULL)
  274 
  275 #define CAP_KQUEUE              (CAP_KQUEUE_EVENT | CAP_KQUEUE_CHANGE)
  276 
  277 /* All used bits for index 1. */
  278 #define CAP_ALL1                CAPRIGHT(1, 0x00000000001FFFFFULL)
  279 
  280 /* Available bits for index 1. */
  281 #define CAP_UNUSED1_22          CAPRIGHT(1, 0x0000000000200000ULL)
  282 /* ... */
  283 #define CAP_UNUSED1_57          CAPRIGHT(1, 0x0100000000000000ULL)
  284 
  285 /* Backward compatibility. */
  286 #define CAP_POLL_EVENT          CAP_EVENT
  287 
  288 #define CAP_ALL(rights)         do {                                    \
  289         (rights)->cr_rights[0] =                                        \
  290             ((uint64_t)CAP_RIGHTS_VERSION << 62) | CAP_ALL0;            \
  291         (rights)->cr_rights[1] = CAP_ALL1;                              \
  292 } while (0)
  293 
  294 #define CAP_NONE(rights)        do {                                    \
  295         (rights)->cr_rights[0] =                                        \
  296             ((uint64_t)CAP_RIGHTS_VERSION << 62) | CAPRIGHT(0, 0ULL);   \
  297         (rights)->cr_rights[1] = CAPRIGHT(1, 0ULL);                     \
  298 } while (0)
  299 
  300 #define CAPRVER(right)          ((int)((right) >> 62))
  301 #define CAPVER(rights)          CAPRVER((rights)->cr_rights[0])
  302 #define CAPARSIZE(rights)       (CAPVER(rights) + 2)
  303 #define CAPIDXBIT(right)        ((int)(((right) >> 57) & 0x1F))
  304 
  305 /*
  306  * Allowed fcntl(2) commands.
  307  */
  308 #define CAP_FCNTL_GETFL         (1 << F_GETFL)
  309 #define CAP_FCNTL_SETFL         (1 << F_SETFL)
  310 #define CAP_FCNTL_GETOWN        (1 << F_GETOWN)
  311 #define CAP_FCNTL_SETOWN        (1 << F_SETOWN)
  312 #define CAP_FCNTL_ALL           (CAP_FCNTL_GETFL | CAP_FCNTL_SETFL | \
  313                                  CAP_FCNTL_GETOWN | CAP_FCNTL_SETOWN)
  314 
  315 #define CAP_IOCTLS_ALL  SSIZE_MAX
  316 
  317 __BEGIN_DECLS
  318 
  319 #define cap_rights_init(...)                                            \
  320         __cap_rights_init(CAP_RIGHTS_VERSION, __VA_ARGS__, 0ULL)
  321 cap_rights_t *__cap_rights_init(int version, cap_rights_t *rights, ...);
  322 
  323 #define cap_rights_set(...)                                             \
  324         __cap_rights_set(__VA_ARGS__, 0ULL)
  325 cap_rights_t *__cap_rights_set(cap_rights_t *rights, ...);
  326 
  327 #define cap_rights_clear(...)                                           \
  328         __cap_rights_clear(__VA_ARGS__, 0ULL)
  329 cap_rights_t *__cap_rights_clear(cap_rights_t *rights, ...);
  330 
  331 #define cap_rights_is_set(...)                                          \
  332         __cap_rights_is_set(__VA_ARGS__, 0ULL)
  333 bool __cap_rights_is_set(const cap_rights_t *rights, ...);
  334 
  335 bool cap_rights_is_valid(const cap_rights_t *rights);
  336 cap_rights_t *cap_rights_merge(cap_rights_t *dst, const cap_rights_t *src);
  337 cap_rights_t *cap_rights_remove(cap_rights_t *dst, const cap_rights_t *src);
  338 bool cap_rights_contains(const cap_rights_t *big, const cap_rights_t *little);
  339 
  340 __END_DECLS
  341 
  342 #ifdef _KERNEL
  343 
  344 #include <sys/systm.h>
  345 
  346 #define IN_CAPABILITY_MODE(td) (((td)->td_ucred->cr_flags & CRED_FLAG_CAPMODE) != 0)
  347 
  348 struct filedesc;
  349 struct filedescent;
  350 
  351 /*
  352  * Test whether a capability grants the requested rights.
  353  */
  354 int     cap_check(const cap_rights_t *havep, const cap_rights_t *needp);
  355 /*
  356  * Convert capability rights into VM access flags.
  357  */
  358 u_char  cap_rights_to_vmprot(cap_rights_t *havep);
  359 
  360 /*
  361  * For the purposes of procstat(1) and similar tools, allow kern_descrip.c to
  362  * extract the rights from a capability.
  363  */
  364 cap_rights_t    *cap_rights_fde(struct filedescent *fde);
  365 cap_rights_t    *cap_rights(struct filedesc *fdp, int fd);
  366 
  367 int     cap_ioctl_check(struct filedesc *fdp, int fd, u_long cmd);
  368 int     cap_fcntl_check_fde(struct filedescent *fde, int cmd);
  369 int     cap_fcntl_check(struct filedesc *fdp, int fd, int cmd);
  370 
  371 extern int trap_enotcap;
  372 
  373 #else /* !_KERNEL */
  374 
  375 __BEGIN_DECLS
  376 /*
  377  * cap_enter(): Cause the process to enter capability mode, which will
  378  * prevent it from directly accessing global namespaces.  System calls will
  379  * be limited to process-local, process-inherited, or file descriptor
  380  * operations.  If already in capability mode, a no-op.
  381  */
  382 int     cap_enter(void);
  383 
  384 /*
  385  * Are we sandboxed (in capability mode)?
  386  * This is a libc wrapper around the cap_getmode(2) system call.
  387  */
  388 bool    cap_sandboxed(void);
  389 
  390 /*
  391  * cap_getmode(): Are we in capability mode?
  392  */
  393 int     cap_getmode(u_int *modep);
  394 
  395 /*
  396  * Limits capability rights for the given descriptor (CAP_*).
  397  */
  398 int cap_rights_limit(int fd, const cap_rights_t *rights);
  399 /*
  400  * Returns capability rights for the given descriptor.
  401  */
  402 #define cap_rights_get(fd, rights)                                      \
  403         __cap_rights_get(CAP_RIGHTS_VERSION, (fd), (rights))
  404 int __cap_rights_get(int version, int fd, cap_rights_t *rights);
  405 /*
  406  * Limits allowed ioctls for the given descriptor.
  407  */
  408 int cap_ioctls_limit(int fd, const cap_ioctl_t *cmds, size_t ncmds);
  409 /*
  410  * Returns array of allowed ioctls for the given descriptor.
  411  * If all ioctls are allowed, the cmds array is not populated and
  412  * the function returns CAP_IOCTLS_ALL.
  413  */
  414 ssize_t cap_ioctls_get(int fd, cap_ioctl_t *cmds, size_t maxcmds);
  415 /*
  416  * Limits allowed fcntls for the given descriptor (CAP_FCNTL_*).
  417  */
  418 int cap_fcntls_limit(int fd, uint32_t fcntlrights);
  419 /*
  420  * Returns bitmask of allowed fcntls for the given descriptor.
  421  */
  422 int cap_fcntls_get(int fd, uint32_t *fcntlrightsp);
  423 
  424 __END_DECLS
  425 
  426 #endif /* !_KERNEL */
  427 
  428 #endif /* !_SYS_CAPSICUM_H_ */

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