f17ef28674
This gets rid of the error prone naming where fget_unlocked returns with a ref held, while fget_locked requires a lock but provides nothing in terms of making sure the file lives past unlock. No functional changes.
690 lines
15 KiB
C
690 lines
15 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
|
|
*
|
|
* Copyright (c) 2008-2011 Robert N. M. Watson
|
|
* Copyright (c) 2010-2011 Jonathan Anderson
|
|
* 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 kernel capability facility.
|
|
*
|
|
* Two kernel features are implemented here: capability mode, a sandboxed mode
|
|
* of execution for processes, and capabilities, a refinement on file
|
|
* descriptors that allows fine-grained control over operations on the file
|
|
* descriptor. Collectively, these allow processes to run in the style of a
|
|
* historic "capability system" in which they can use only resources
|
|
* explicitly delegated to them. This model is enforced by restricting access
|
|
* to global namespaces in capability mode.
|
|
*
|
|
* Capabilities wrap other file descriptor types, binding them to a constant
|
|
* rights mask set when the capability is created. New capabilities may be
|
|
* derived from existing capabilities, but only if they have the same or a
|
|
* strict subset of the rights on the original capability.
|
|
*
|
|
* System calls permitted in capability mode are defined in capabilities.conf;
|
|
* calls must be carefully audited for safety to ensure that they don't allow
|
|
* escape from a sandbox. Some calls permit only a subset of operations in
|
|
* capability mode -- for example, shm_open(2) is limited to creating
|
|
* anonymous, rather than named, POSIX shared memory objects.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include "opt_capsicum.h"
|
|
#include "opt_ktrace.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/capsicum.h>
|
|
#include <sys/file.h>
|
|
#include <sys/filedesc.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/limits.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/syscallsubr.h>
|
|
#include <sys/sysproto.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/ucred.h>
|
|
#include <sys/uio.h>
|
|
#include <sys/ktrace.h>
|
|
|
|
#include <security/audit/audit.h>
|
|
|
|
#include <vm/uma.h>
|
|
#include <vm/vm.h>
|
|
|
|
bool __read_frequently trap_enotcap;
|
|
SYSCTL_BOOL(_kern, OID_AUTO, trap_enotcap, CTLFLAG_RWTUN, &trap_enotcap, 0,
|
|
"Deliver SIGTRAP on ENOTCAPABLE");
|
|
|
|
#ifdef CAPABILITY_MODE
|
|
|
|
#define IOCTLS_MAX_COUNT 256 /* XXX: Is 256 sane? */
|
|
|
|
FEATURE(security_capability_mode, "Capsicum Capability Mode");
|
|
|
|
/*
|
|
* System call to enter capability mode for the process.
|
|
*/
|
|
int
|
|
sys_cap_enter(struct thread *td, struct cap_enter_args *uap)
|
|
{
|
|
struct ucred *newcred, *oldcred;
|
|
struct proc *p;
|
|
|
|
if (IN_CAPABILITY_MODE(td))
|
|
return (0);
|
|
|
|
newcred = crget();
|
|
p = td->td_proc;
|
|
PROC_LOCK(p);
|
|
oldcred = crcopysafe(p, newcred);
|
|
newcred->cr_flags |= CRED_FLAG_CAPMODE;
|
|
proc_set_cred(p, newcred);
|
|
PROC_UNLOCK(p);
|
|
crfree(oldcred);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* System call to query whether the process is in capability mode.
|
|
*/
|
|
int
|
|
sys_cap_getmode(struct thread *td, struct cap_getmode_args *uap)
|
|
{
|
|
u_int i;
|
|
|
|
i = IN_CAPABILITY_MODE(td) ? 1 : 0;
|
|
return (copyout(&i, uap->modep, sizeof(i)));
|
|
}
|
|
|
|
#else /* !CAPABILITY_MODE */
|
|
|
|
int
|
|
sys_cap_enter(struct thread *td, struct cap_enter_args *uap)
|
|
{
|
|
|
|
return (ENOSYS);
|
|
}
|
|
|
|
int
|
|
sys_cap_getmode(struct thread *td, struct cap_getmode_args *uap)
|
|
{
|
|
|
|
return (ENOSYS);
|
|
}
|
|
|
|
#endif /* CAPABILITY_MODE */
|
|
|
|
#ifdef CAPABILITIES
|
|
|
|
FEATURE(security_capabilities, "Capsicum Capabilities");
|
|
|
|
MALLOC_DECLARE(M_FILECAPS);
|
|
|
|
static inline int
|
|
_cap_check(const cap_rights_t *havep, const cap_rights_t *needp,
|
|
enum ktr_cap_fail_type type)
|
|
{
|
|
|
|
if (!cap_rights_contains(havep, needp)) {
|
|
#ifdef KTRACE
|
|
if (KTRPOINT(curthread, KTR_CAPFAIL))
|
|
ktrcapfail(type, needp, havep);
|
|
#endif
|
|
return (ENOTCAPABLE);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Test whether a capability grants the requested rights.
|
|
*/
|
|
int
|
|
cap_check(const cap_rights_t *havep, const cap_rights_t *needp)
|
|
{
|
|
|
|
return (_cap_check(havep, needp, CAPFAIL_NOTCAPABLE));
|
|
}
|
|
|
|
int
|
|
cap_check_failed_notcapable(const cap_rights_t *havep, const cap_rights_t *needp)
|
|
{
|
|
|
|
#ifdef KTRACE
|
|
if (KTRPOINT(curthread, KTR_CAPFAIL))
|
|
ktrcapfail(CAPFAIL_NOTCAPABLE, needp, havep);
|
|
#endif
|
|
return (ENOTCAPABLE);
|
|
}
|
|
|
|
/*
|
|
* Convert capability rights into VM access flags.
|
|
*/
|
|
vm_prot_t
|
|
cap_rights_to_vmprot(const cap_rights_t *havep)
|
|
{
|
|
vm_prot_t maxprot;
|
|
|
|
maxprot = VM_PROT_NONE;
|
|
if (cap_rights_is_set(havep, CAP_MMAP_R))
|
|
maxprot |= VM_PROT_READ;
|
|
if (cap_rights_is_set(havep, CAP_MMAP_W))
|
|
maxprot |= VM_PROT_WRITE;
|
|
if (cap_rights_is_set(havep, CAP_MMAP_X))
|
|
maxprot |= VM_PROT_EXECUTE;
|
|
|
|
return (maxprot);
|
|
}
|
|
|
|
/*
|
|
* Extract rights from a capability for monitoring purposes -- not for use in
|
|
* any other way, as we want to keep all capability permission evaluation in
|
|
* this one file.
|
|
*/
|
|
|
|
const cap_rights_t *
|
|
cap_rights_fde(const struct filedescent *fdep)
|
|
{
|
|
|
|
return (cap_rights_fde_inline(fdep));
|
|
}
|
|
|
|
const cap_rights_t *
|
|
cap_rights(struct filedesc *fdp, int fd)
|
|
{
|
|
|
|
return (cap_rights_fde(&fdp->fd_ofiles[fd]));
|
|
}
|
|
|
|
int
|
|
kern_cap_rights_limit(struct thread *td, int fd, cap_rights_t *rights)
|
|
{
|
|
struct filedesc *fdp;
|
|
struct filedescent *fdep;
|
|
u_long *ioctls;
|
|
int error;
|
|
|
|
fdp = td->td_proc->p_fd;
|
|
FILEDESC_XLOCK(fdp);
|
|
fdep = fdeget_noref(fdp, fd);
|
|
if (fdep == NULL) {
|
|
FILEDESC_XUNLOCK(fdp);
|
|
return (EBADF);
|
|
}
|
|
ioctls = NULL;
|
|
error = _cap_check(cap_rights(fdp, fd), rights, CAPFAIL_INCREASE);
|
|
if (error == 0) {
|
|
seqc_write_begin(&fdep->fde_seqc);
|
|
fdep->fde_rights = *rights;
|
|
if (!cap_rights_is_set(rights, CAP_IOCTL)) {
|
|
ioctls = fdep->fde_ioctls;
|
|
fdep->fde_ioctls = NULL;
|
|
fdep->fde_nioctls = 0;
|
|
}
|
|
if (!cap_rights_is_set(rights, CAP_FCNTL))
|
|
fdep->fde_fcntls = 0;
|
|
seqc_write_end(&fdep->fde_seqc);
|
|
}
|
|
FILEDESC_XUNLOCK(fdp);
|
|
free(ioctls, M_FILECAPS);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* System call to limit rights of the given capability.
|
|
*/
|
|
int
|
|
sys_cap_rights_limit(struct thread *td, struct cap_rights_limit_args *uap)
|
|
{
|
|
cap_rights_t rights;
|
|
int error, version;
|
|
|
|
cap_rights_init_zero(&rights);
|
|
|
|
error = copyin(uap->rightsp, &rights, sizeof(rights.cr_rights[0]));
|
|
if (error != 0)
|
|
return (error);
|
|
version = CAPVER(&rights);
|
|
if (version != CAP_RIGHTS_VERSION_00)
|
|
return (EINVAL);
|
|
|
|
error = copyin(uap->rightsp, &rights,
|
|
sizeof(rights.cr_rights[0]) * CAPARSIZE(&rights));
|
|
if (error != 0)
|
|
return (error);
|
|
/* Check for race. */
|
|
if (CAPVER(&rights) != version)
|
|
return (EINVAL);
|
|
|
|
if (!cap_rights_is_valid(&rights))
|
|
return (EINVAL);
|
|
|
|
if (version != CAP_RIGHTS_VERSION) {
|
|
rights.cr_rights[0] &= ~(0x3ULL << 62);
|
|
rights.cr_rights[0] |= ((uint64_t)CAP_RIGHTS_VERSION << 62);
|
|
}
|
|
#ifdef KTRACE
|
|
if (KTRPOINT(td, KTR_STRUCT))
|
|
ktrcaprights(&rights);
|
|
#endif
|
|
|
|
AUDIT_ARG_FD(uap->fd);
|
|
AUDIT_ARG_RIGHTS(&rights);
|
|
return (kern_cap_rights_limit(td, uap->fd, &rights));
|
|
}
|
|
|
|
/*
|
|
* System call to query the rights mask associated with a capability.
|
|
*/
|
|
int
|
|
sys___cap_rights_get(struct thread *td, struct __cap_rights_get_args *uap)
|
|
{
|
|
struct filedesc *fdp;
|
|
cap_rights_t rights;
|
|
int error, fd, i, n;
|
|
|
|
if (uap->version != CAP_RIGHTS_VERSION_00)
|
|
return (EINVAL);
|
|
|
|
fd = uap->fd;
|
|
|
|
AUDIT_ARG_FD(fd);
|
|
|
|
fdp = td->td_proc->p_fd;
|
|
FILEDESC_SLOCK(fdp);
|
|
if (fget_noref(fdp, fd) == NULL) {
|
|
FILEDESC_SUNLOCK(fdp);
|
|
return (EBADF);
|
|
}
|
|
rights = *cap_rights(fdp, fd);
|
|
FILEDESC_SUNLOCK(fdp);
|
|
n = uap->version + 2;
|
|
if (uap->version != CAPVER(&rights)) {
|
|
/*
|
|
* For older versions we need to check if the descriptor
|
|
* doesn't contain rights not understood by the caller.
|
|
* If it does, we have to return an error.
|
|
*/
|
|
for (i = n; i < CAPARSIZE(&rights); i++) {
|
|
if ((rights.cr_rights[i] & ~(0x7FULL << 57)) != 0)
|
|
return (EINVAL);
|
|
}
|
|
}
|
|
error = copyout(&rights, uap->rightsp, sizeof(rights.cr_rights[0]) * n);
|
|
#ifdef KTRACE
|
|
if (error == 0 && KTRPOINT(td, KTR_STRUCT))
|
|
ktrcaprights(&rights);
|
|
#endif
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Test whether a capability grants the given ioctl command.
|
|
* If descriptor doesn't have CAP_IOCTL, then ioctls list is empty and
|
|
* ENOTCAPABLE will be returned.
|
|
*/
|
|
int
|
|
cap_ioctl_check(struct filedesc *fdp, int fd, u_long cmd)
|
|
{
|
|
struct filedescent *fdep;
|
|
u_long *cmds;
|
|
ssize_t ncmds;
|
|
long i;
|
|
|
|
KASSERT(fd >= 0 && fd < fdp->fd_nfiles,
|
|
("%s: invalid fd=%d", __func__, fd));
|
|
|
|
fdep = fdeget_noref(fdp, fd);
|
|
KASSERT(fdep != NULL,
|
|
("%s: invalid fd=%d", __func__, fd));
|
|
|
|
ncmds = fdep->fde_nioctls;
|
|
if (ncmds == -1)
|
|
return (0);
|
|
|
|
cmds = fdep->fde_ioctls;
|
|
for (i = 0; i < ncmds; i++) {
|
|
if (cmds[i] == cmd)
|
|
return (0);
|
|
}
|
|
|
|
return (ENOTCAPABLE);
|
|
}
|
|
|
|
/*
|
|
* Check if the current ioctls list can be replaced by the new one.
|
|
*/
|
|
static int
|
|
cap_ioctl_limit_check(struct filedescent *fdep, const u_long *cmds,
|
|
size_t ncmds)
|
|
{
|
|
u_long *ocmds;
|
|
ssize_t oncmds;
|
|
u_long i;
|
|
long j;
|
|
|
|
oncmds = fdep->fde_nioctls;
|
|
if (oncmds == -1)
|
|
return (0);
|
|
if (oncmds < (ssize_t)ncmds)
|
|
return (ENOTCAPABLE);
|
|
|
|
ocmds = fdep->fde_ioctls;
|
|
for (i = 0; i < ncmds; i++) {
|
|
for (j = 0; j < oncmds; j++) {
|
|
if (cmds[i] == ocmds[j])
|
|
break;
|
|
}
|
|
if (j == oncmds)
|
|
return (ENOTCAPABLE);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
kern_cap_ioctls_limit(struct thread *td, int fd, u_long *cmds, size_t ncmds)
|
|
{
|
|
struct filedesc *fdp;
|
|
struct filedescent *fdep;
|
|
u_long *ocmds;
|
|
int error;
|
|
|
|
AUDIT_ARG_FD(fd);
|
|
|
|
if (ncmds > IOCTLS_MAX_COUNT) {
|
|
error = EINVAL;
|
|
goto out_free;
|
|
}
|
|
|
|
fdp = td->td_proc->p_fd;
|
|
FILEDESC_XLOCK(fdp);
|
|
|
|
fdep = fdeget_noref(fdp, fd);
|
|
if (fdep == NULL) {
|
|
error = EBADF;
|
|
goto out;
|
|
}
|
|
|
|
error = cap_ioctl_limit_check(fdep, cmds, ncmds);
|
|
if (error != 0)
|
|
goto out;
|
|
|
|
ocmds = fdep->fde_ioctls;
|
|
seqc_write_begin(&fdep->fde_seqc);
|
|
fdep->fde_ioctls = cmds;
|
|
fdep->fde_nioctls = ncmds;
|
|
seqc_write_end(&fdep->fde_seqc);
|
|
|
|
cmds = ocmds;
|
|
error = 0;
|
|
out:
|
|
FILEDESC_XUNLOCK(fdp);
|
|
out_free:
|
|
free(cmds, M_FILECAPS);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
sys_cap_ioctls_limit(struct thread *td, struct cap_ioctls_limit_args *uap)
|
|
{
|
|
u_long *cmds;
|
|
size_t ncmds;
|
|
int error;
|
|
|
|
ncmds = uap->ncmds;
|
|
|
|
if (ncmds > IOCTLS_MAX_COUNT)
|
|
return (EINVAL);
|
|
|
|
if (ncmds == 0) {
|
|
cmds = NULL;
|
|
} else {
|
|
cmds = malloc(sizeof(cmds[0]) * ncmds, M_FILECAPS, M_WAITOK);
|
|
error = copyin(uap->cmds, cmds, sizeof(cmds[0]) * ncmds);
|
|
if (error != 0) {
|
|
free(cmds, M_FILECAPS);
|
|
return (error);
|
|
}
|
|
}
|
|
|
|
return (kern_cap_ioctls_limit(td, uap->fd, cmds, ncmds));
|
|
}
|
|
|
|
int
|
|
sys_cap_ioctls_get(struct thread *td, struct cap_ioctls_get_args *uap)
|
|
{
|
|
struct filedesc *fdp;
|
|
struct filedescent *fdep;
|
|
u_long *cmdsp, *dstcmds;
|
|
size_t maxcmds, ncmds;
|
|
int16_t count;
|
|
int error, fd;
|
|
|
|
fd = uap->fd;
|
|
dstcmds = uap->cmds;
|
|
maxcmds = uap->maxcmds;
|
|
|
|
AUDIT_ARG_FD(fd);
|
|
|
|
fdp = td->td_proc->p_fd;
|
|
|
|
cmdsp = NULL;
|
|
if (dstcmds != NULL) {
|
|
cmdsp = malloc(sizeof(cmdsp[0]) * IOCTLS_MAX_COUNT, M_FILECAPS,
|
|
M_WAITOK | M_ZERO);
|
|
}
|
|
|
|
FILEDESC_SLOCK(fdp);
|
|
fdep = fdeget_noref(fdp, fd);
|
|
if (fdep == NULL) {
|
|
error = EBADF;
|
|
FILEDESC_SUNLOCK(fdp);
|
|
goto out;
|
|
}
|
|
count = fdep->fde_nioctls;
|
|
if (count != -1 && cmdsp != NULL) {
|
|
ncmds = MIN(count, maxcmds);
|
|
memcpy(cmdsp, fdep->fde_ioctls, sizeof(cmdsp[0]) * ncmds);
|
|
}
|
|
FILEDESC_SUNLOCK(fdp);
|
|
|
|
/*
|
|
* If all ioctls are allowed (fde_nioctls == -1 && fde_ioctls == NULL)
|
|
* the only sane thing we can do is to not populate the given array and
|
|
* return CAP_IOCTLS_ALL.
|
|
*/
|
|
if (count != -1) {
|
|
if (cmdsp != NULL) {
|
|
error = copyout(cmdsp, dstcmds,
|
|
sizeof(cmdsp[0]) * ncmds);
|
|
if (error != 0)
|
|
goto out;
|
|
}
|
|
td->td_retval[0] = count;
|
|
} else {
|
|
td->td_retval[0] = CAP_IOCTLS_ALL;
|
|
}
|
|
|
|
error = 0;
|
|
out:
|
|
free(cmdsp, M_FILECAPS);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Test whether a capability grants the given fcntl command.
|
|
*/
|
|
int
|
|
cap_fcntl_check_fde(struct filedescent *fdep, int cmd)
|
|
{
|
|
uint32_t fcntlcap;
|
|
|
|
fcntlcap = (1 << cmd);
|
|
KASSERT((CAP_FCNTL_ALL & fcntlcap) != 0,
|
|
("Unsupported fcntl=%d.", cmd));
|
|
|
|
if ((fdep->fde_fcntls & fcntlcap) != 0)
|
|
return (0);
|
|
|
|
return (ENOTCAPABLE);
|
|
}
|
|
|
|
int
|
|
cap_fcntl_check(struct filedesc *fdp, int fd, int cmd)
|
|
{
|
|
|
|
KASSERT(fd >= 0 && fd < fdp->fd_nfiles,
|
|
("%s: invalid fd=%d", __func__, fd));
|
|
|
|
return (cap_fcntl_check_fde(&fdp->fd_ofiles[fd], cmd));
|
|
}
|
|
|
|
int
|
|
sys_cap_fcntls_limit(struct thread *td, struct cap_fcntls_limit_args *uap)
|
|
{
|
|
struct filedesc *fdp;
|
|
struct filedescent *fdep;
|
|
uint32_t fcntlrights;
|
|
int fd;
|
|
|
|
fd = uap->fd;
|
|
fcntlrights = uap->fcntlrights;
|
|
|
|
AUDIT_ARG_FD(fd);
|
|
AUDIT_ARG_FCNTL_RIGHTS(fcntlrights);
|
|
|
|
if ((fcntlrights & ~CAP_FCNTL_ALL) != 0)
|
|
return (EINVAL);
|
|
|
|
fdp = td->td_proc->p_fd;
|
|
FILEDESC_XLOCK(fdp);
|
|
|
|
fdep = fdeget_noref(fdp, fd);
|
|
if (fdep == NULL) {
|
|
FILEDESC_XUNLOCK(fdp);
|
|
return (EBADF);
|
|
}
|
|
|
|
if ((fcntlrights & ~fdep->fde_fcntls) != 0) {
|
|
FILEDESC_XUNLOCK(fdp);
|
|
return (ENOTCAPABLE);
|
|
}
|
|
|
|
seqc_write_begin(&fdep->fde_seqc);
|
|
fdep->fde_fcntls = fcntlrights;
|
|
seqc_write_end(&fdep->fde_seqc);
|
|
FILEDESC_XUNLOCK(fdp);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
sys_cap_fcntls_get(struct thread *td, struct cap_fcntls_get_args *uap)
|
|
{
|
|
struct filedesc *fdp;
|
|
struct filedescent *fdep;
|
|
uint32_t rights;
|
|
int fd;
|
|
|
|
fd = uap->fd;
|
|
|
|
AUDIT_ARG_FD(fd);
|
|
|
|
fdp = td->td_proc->p_fd;
|
|
FILEDESC_SLOCK(fdp);
|
|
fdep = fdeget_noref(fdp, fd);
|
|
if (fdep == NULL) {
|
|
FILEDESC_SUNLOCK(fdp);
|
|
return (EBADF);
|
|
}
|
|
rights = fdep->fde_fcntls;
|
|
FILEDESC_SUNLOCK(fdp);
|
|
|
|
return (copyout(&rights, uap->fcntlrightsp, sizeof(rights)));
|
|
}
|
|
|
|
#else /* !CAPABILITIES */
|
|
|
|
/*
|
|
* Stub Capability functions for when options CAPABILITIES isn't compiled
|
|
* into the kernel.
|
|
*/
|
|
|
|
int
|
|
sys_cap_rights_limit(struct thread *td, struct cap_rights_limit_args *uap)
|
|
{
|
|
|
|
return (ENOSYS);
|
|
}
|
|
|
|
int
|
|
sys___cap_rights_get(struct thread *td, struct __cap_rights_get_args *uap)
|
|
{
|
|
|
|
return (ENOSYS);
|
|
}
|
|
|
|
int
|
|
sys_cap_ioctls_limit(struct thread *td, struct cap_ioctls_limit_args *uap)
|
|
{
|
|
|
|
return (ENOSYS);
|
|
}
|
|
|
|
int
|
|
sys_cap_ioctls_get(struct thread *td, struct cap_ioctls_get_args *uap)
|
|
{
|
|
|
|
return (ENOSYS);
|
|
}
|
|
|
|
int
|
|
sys_cap_fcntls_limit(struct thread *td, struct cap_fcntls_limit_args *uap)
|
|
{
|
|
|
|
return (ENOSYS);
|
|
}
|
|
|
|
int
|
|
sys_cap_fcntls_get(struct thread *td, struct cap_fcntls_get_args *uap)
|
|
{
|
|
|
|
return (ENOSYS);
|
|
}
|
|
|
|
#endif /* CAPABILITIES */
|