99851f359e
patch modifies makesyscalls.sh to prefix all of the non-compatibility calls (e.g. not linux_, freebsd32_) with sys_ and updates the kernel entry points and all places in the code that use them. It also fixes an additional name space collision between the kernel function psignal and the libc function of the same name by renaming the kernel psignal kern_psignal(). By introducing this change now we will ease future MFCs that change syscalls. Reviewed by: rwatson Approved by: re (bz)
307 lines
7.1 KiB
C
307 lines
7.1 KiB
C
/*-
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* Copyright (c) 2001 The FreeBSD Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_compat.h"
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#include <sys/fcntl.h>
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#include <sys/param.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mutex.h>
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#include <sys/priv.h>
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#include <sys/proc.h>
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#include <sys/syscallsubr.h>
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#include <sys/sysproto.h>
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#include <sys/systm.h>
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#ifdef COMPAT_LINUX32
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#include <machine/../linux32/linux.h>
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#include <machine/../linux32/linux32_proto.h>
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#else
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#include <machine/../linux/linux.h>
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#include <machine/../linux/linux_proto.h>
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#endif
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#include <compat/linux/linux_util.h>
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DUMMY(setfsuid16);
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DUMMY(setfsgid16);
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DUMMY(getresuid16);
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DUMMY(getresgid16);
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#define CAST_NOCHG(x) ((x == 0xFFFF) ? -1 : x)
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int
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linux_chown16(struct thread *td, struct linux_chown16_args *args)
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{
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char *path;
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int error;
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LCONVPATHEXIST(td, args->path, &path);
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#ifdef DEBUG
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if (ldebug(chown16))
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printf(ARGS(chown16, "%s, %d, %d"), path, args->uid, args->gid);
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#endif
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error = kern_chown(td, path, UIO_SYSSPACE, CAST_NOCHG(args->uid),
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CAST_NOCHG(args->gid));
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LFREEPATH(path);
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return (error);
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}
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int
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linux_lchown16(struct thread *td, struct linux_lchown16_args *args)
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{
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char *path;
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int error;
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LCONVPATHEXIST(td, args->path, &path);
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#ifdef DEBUG
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if (ldebug(lchown16))
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printf(ARGS(lchown16, "%s, %d, %d"), path, args->uid,
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args->gid);
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#endif
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error = kern_lchown(td, path, UIO_SYSSPACE, CAST_NOCHG(args->uid),
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CAST_NOCHG(args->gid));
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LFREEPATH(path);
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return (error);
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}
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int
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linux_setgroups16(struct thread *td, struct linux_setgroups16_args *args)
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{
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struct ucred *newcred, *oldcred;
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l_gid16_t *linux_gidset;
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gid_t *bsd_gidset;
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int ngrp, error;
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struct proc *p;
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#ifdef DEBUG
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if (ldebug(setgroups16))
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printf(ARGS(setgroups16, "%d, *"), args->gidsetsize);
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#endif
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ngrp = args->gidsetsize;
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if (ngrp < 0 || ngrp >= ngroups_max + 1)
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return (EINVAL);
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linux_gidset = malloc(ngrp * sizeof(*linux_gidset), M_TEMP, M_WAITOK);
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error = copyin(args->gidset, linux_gidset, ngrp * sizeof(l_gid16_t));
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if (error)
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return (error);
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newcred = crget();
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p = td->td_proc;
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PROC_LOCK(p);
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oldcred = crcopysafe(p, newcred);
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/*
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* cr_groups[0] holds egid. Setting the whole set from
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* the supplied set will cause egid to be changed too.
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* Keep cr_groups[0] unchanged to prevent that.
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*/
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if ((error = priv_check_cred(oldcred, PRIV_CRED_SETGROUPS, 0)) != 0) {
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PROC_UNLOCK(p);
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crfree(newcred);
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goto out;
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}
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if (ngrp > 0) {
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newcred->cr_ngroups = ngrp + 1;
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bsd_gidset = newcred->cr_groups;
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ngrp--;
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while (ngrp >= 0) {
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bsd_gidset[ngrp + 1] = linux_gidset[ngrp];
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ngrp--;
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}
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}
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else
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newcred->cr_ngroups = 1;
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setsugid(td->td_proc);
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p->p_ucred = newcred;
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PROC_UNLOCK(p);
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crfree(oldcred);
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error = 0;
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out:
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free(linux_gidset, M_TEMP);
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return (error);
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}
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int
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linux_getgroups16(struct thread *td, struct linux_getgroups16_args *args)
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{
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struct ucred *cred;
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l_gid16_t *linux_gidset;
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gid_t *bsd_gidset;
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int bsd_gidsetsz, ngrp, error;
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#ifdef DEBUG
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if (ldebug(getgroups16))
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printf(ARGS(getgroups16, "%d, *"), args->gidsetsize);
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#endif
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cred = td->td_ucred;
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bsd_gidset = cred->cr_groups;
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bsd_gidsetsz = cred->cr_ngroups - 1;
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/*
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* cr_groups[0] holds egid. Returning the whole set
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* here will cause a duplicate. Exclude cr_groups[0]
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* to prevent that.
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*/
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if ((ngrp = args->gidsetsize) == 0) {
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td->td_retval[0] = bsd_gidsetsz;
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return (0);
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}
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if (ngrp < bsd_gidsetsz)
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return (EINVAL);
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ngrp = 0;
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linux_gidset = malloc(bsd_gidsetsz * sizeof(*linux_gidset),
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M_TEMP, M_WAITOK);
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while (ngrp < bsd_gidsetsz) {
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linux_gidset[ngrp] = bsd_gidset[ngrp + 1];
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ngrp++;
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}
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error = copyout(linux_gidset, args->gidset, ngrp * sizeof(l_gid16_t));
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free(linux_gidset, M_TEMP);
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if (error)
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return (error);
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td->td_retval[0] = ngrp;
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return (0);
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}
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/*
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* The FreeBSD native getgid(2) and getuid(2) also modify td->td_retval[1]
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* when COMPAT_43 is defined. This clobbers registers that are assumed to
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* be preserved. The following lightweight syscalls fixes this. See also
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* linux_getpid(2), linux_getgid(2) and linux_getuid(2) in linux_misc.c
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*
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* linux_getgid16() - MP SAFE
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* linux_getuid16() - MP SAFE
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*/
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int
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linux_getgid16(struct thread *td, struct linux_getgid16_args *args)
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{
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td->td_retval[0] = td->td_ucred->cr_rgid;
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return (0);
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}
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int
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linux_getuid16(struct thread *td, struct linux_getuid16_args *args)
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{
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td->td_retval[0] = td->td_ucred->cr_ruid;
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return (0);
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}
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int
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linux_getegid16(struct thread *td, struct linux_getegid16_args *args)
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{
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struct getegid_args bsd;
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return (sys_getegid(td, &bsd));
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}
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int
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linux_geteuid16(struct thread *td, struct linux_geteuid16_args *args)
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{
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struct geteuid_args bsd;
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return (sys_geteuid(td, &bsd));
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}
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int
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linux_setgid16(struct thread *td, struct linux_setgid16_args *args)
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{
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struct setgid_args bsd;
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bsd.gid = args->gid;
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return (sys_setgid(td, &bsd));
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}
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int
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linux_setuid16(struct thread *td, struct linux_setuid16_args *args)
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{
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struct setuid_args bsd;
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bsd.uid = args->uid;
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return (sys_setuid(td, &bsd));
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}
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int
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linux_setregid16(struct thread *td, struct linux_setregid16_args *args)
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{
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struct setregid_args bsd;
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bsd.rgid = CAST_NOCHG(args->rgid);
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bsd.egid = CAST_NOCHG(args->egid);
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return (sys_setregid(td, &bsd));
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}
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int
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linux_setreuid16(struct thread *td, struct linux_setreuid16_args *args)
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{
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struct setreuid_args bsd;
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bsd.ruid = CAST_NOCHG(args->ruid);
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bsd.euid = CAST_NOCHG(args->euid);
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return (sys_setreuid(td, &bsd));
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}
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int
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linux_setresgid16(struct thread *td, struct linux_setresgid16_args *args)
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{
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struct setresgid_args bsd;
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bsd.rgid = CAST_NOCHG(args->rgid);
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bsd.egid = CAST_NOCHG(args->egid);
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bsd.sgid = CAST_NOCHG(args->sgid);
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return (sys_setresgid(td, &bsd));
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}
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int
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linux_setresuid16(struct thread *td, struct linux_setresuid16_args *args)
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{
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struct setresuid_args bsd;
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bsd.ruid = CAST_NOCHG(args->ruid);
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bsd.euid = CAST_NOCHG(args->euid);
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bsd.suid = CAST_NOCHG(args->suid);
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return (sys_setresuid(td, &bsd));
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}
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