654 lines
14 KiB
C
654 lines
14 KiB
C
/* $NetBSD: kern_ktrace.c,v 1.35 1999/05/05 20:01:08 thorpej Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1989, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* 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.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
|
|
*
|
|
* @(#)kern_ktrace.c 8.5 (Berkeley) 5/14/95
|
|
*/
|
|
|
|
#include "opt_ktrace.h"
|
|
|
|
#ifdef KTRACE
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/file.h>
|
|
#include <sys/namei.h>
|
|
#include <sys/vnode.h>
|
|
#include <sys/ktrace.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/syslog.h>
|
|
#include <sys/filedesc.h>
|
|
|
|
#include <sys/mount.h>
|
|
#include <sys/syscallargs.h>
|
|
|
|
struct ktr_header *ktrgetheader __P((int));
|
|
int ktrops __P((struct proc *, struct proc *, int, int, void *));
|
|
int ktrsetchildren __P((struct proc *, struct proc *, int, int, void *));
|
|
void ktrwrite __P((struct proc *, void *, struct ktr_header *));
|
|
int ktrcanset __P((struct proc *, struct proc *));
|
|
|
|
void
|
|
ktrderef(p)
|
|
struct proc *p;
|
|
{
|
|
if (p->p_tracep == NULL)
|
|
return;
|
|
|
|
if (p->p_traceflag & KTRFAC_FD) {
|
|
struct file *fp = p->p_tracep;
|
|
|
|
FILE_USE(fp);
|
|
closef(fp, NULL);
|
|
} else {
|
|
struct vnode *vp = p->p_tracep;
|
|
|
|
vrele(vp);
|
|
}
|
|
p->p_tracep = NULL;
|
|
p->p_traceflag = 0;
|
|
}
|
|
|
|
void
|
|
ktradref(p)
|
|
struct proc *p;
|
|
{
|
|
if (p->p_traceflag & KTRFAC_FD) {
|
|
struct file *fp = p->p_tracep;
|
|
|
|
fp->f_count++;
|
|
} else {
|
|
struct vnode *vp = p->p_tracep;
|
|
|
|
VREF(vp);
|
|
}
|
|
}
|
|
|
|
struct ktr_header *
|
|
ktrgetheader(type)
|
|
int type;
|
|
{
|
|
struct ktr_header *kth;
|
|
struct proc *p = curproc; /* XXX */
|
|
|
|
MALLOC(kth, struct ktr_header *, sizeof(struct ktr_header),
|
|
M_TEMP, M_WAITOK);
|
|
kth->ktr_type = type;
|
|
microtime(&kth->ktr_time);
|
|
kth->ktr_pid = p->p_pid;
|
|
memcpy(kth->ktr_comm, p->p_comm, MAXCOMLEN);
|
|
/* Note: ktr_len and ktr_buf are left to be filled in by the caller. */
|
|
return (kth);
|
|
}
|
|
|
|
void
|
|
ktrsyscall(v, code, argsize, args)
|
|
void *v;
|
|
register_t code;
|
|
size_t argsize;
|
|
register_t args[];
|
|
{
|
|
struct ktr_header *kth;
|
|
struct ktr_syscall *ktp;
|
|
struct proc *p = curproc; /* XXX */
|
|
register_t *argp;
|
|
int len = sizeof(struct ktr_syscall) + argsize;
|
|
int i;
|
|
|
|
p->p_traceflag |= KTRFAC_ACTIVE;
|
|
kth = ktrgetheader(KTR_SYSCALL);
|
|
MALLOC(ktp, struct ktr_syscall *, len, M_TEMP, M_WAITOK);
|
|
ktp->ktr_code = code;
|
|
ktp->ktr_argsize = argsize;
|
|
argp = (register_t *)((char *)ktp + sizeof(struct ktr_syscall));
|
|
for (i = 0; i < (argsize / sizeof(*argp)); i++)
|
|
*argp++ = args[i];
|
|
kth->ktr_buf = (caddr_t)ktp;
|
|
kth->ktr_len = len;
|
|
ktrwrite(p, v, kth);
|
|
FREE(ktp, M_TEMP);
|
|
FREE(kth, M_TEMP);
|
|
p->p_traceflag &= ~KTRFAC_ACTIVE;
|
|
}
|
|
|
|
void
|
|
ktrsysret(v, code, error, retval)
|
|
void *v;
|
|
register_t code;
|
|
int error;
|
|
register_t retval;
|
|
{
|
|
struct ktr_header *kth;
|
|
struct ktr_sysret ktp;
|
|
struct proc *p = curproc; /* XXX */
|
|
|
|
p->p_traceflag |= KTRFAC_ACTIVE;
|
|
kth = ktrgetheader(KTR_SYSRET);
|
|
ktp.ktr_code = code;
|
|
ktp.ktr_eosys = 0; /* XXX unused */
|
|
ktp.ktr_error = error;
|
|
ktp.ktr_retval = retval; /* what about val2 ? */
|
|
|
|
kth->ktr_buf = (caddr_t)&ktp;
|
|
kth->ktr_len = sizeof(struct ktr_sysret);
|
|
|
|
ktrwrite(p, v, kth);
|
|
FREE(kth, M_TEMP);
|
|
p->p_traceflag &= ~KTRFAC_ACTIVE;
|
|
}
|
|
|
|
void
|
|
ktrnamei(v, path)
|
|
void *v;
|
|
char *path;
|
|
{
|
|
struct ktr_header *kth;
|
|
struct proc *p = curproc; /* XXX */
|
|
|
|
p->p_traceflag |= KTRFAC_ACTIVE;
|
|
kth = ktrgetheader(KTR_NAMEI);
|
|
kth->ktr_len = strlen(path);
|
|
kth->ktr_buf = path;
|
|
|
|
ktrwrite(p, v, kth);
|
|
FREE(kth, M_TEMP);
|
|
p->p_traceflag &= ~KTRFAC_ACTIVE;
|
|
}
|
|
|
|
void
|
|
ktremul(v, p, emul)
|
|
void *v;
|
|
struct proc *p;
|
|
char *emul;
|
|
{
|
|
struct ktr_header *kth;
|
|
|
|
p->p_traceflag |= KTRFAC_ACTIVE;
|
|
kth = ktrgetheader(KTR_EMUL);
|
|
kth->ktr_len = strlen(emul);
|
|
kth->ktr_buf = emul;
|
|
|
|
ktrwrite(p, v, kth);
|
|
FREE(kth, M_TEMP);
|
|
p->p_traceflag &= ~KTRFAC_ACTIVE;
|
|
}
|
|
|
|
void
|
|
ktrgenio(v, fd, rw, iov, len, error)
|
|
void *v;
|
|
int fd;
|
|
enum uio_rw rw;
|
|
struct iovec *iov;
|
|
int len, error;
|
|
{
|
|
struct ktr_header *kth;
|
|
struct ktr_genio *ktp;
|
|
caddr_t cp;
|
|
int resid = len, cnt;
|
|
struct proc *p = curproc; /* XXX */
|
|
|
|
if (error)
|
|
return;
|
|
p->p_traceflag |= KTRFAC_ACTIVE;
|
|
kth = ktrgetheader(KTR_GENIO);
|
|
MALLOC(ktp, struct ktr_genio *, sizeof(struct ktr_genio) + len,
|
|
M_TEMP, M_WAITOK);
|
|
ktp->ktr_fd = fd;
|
|
ktp->ktr_rw = rw;
|
|
cp = (caddr_t)((char *)ktp + sizeof(struct ktr_genio));
|
|
while (resid > 0) {
|
|
if ((cnt = iov->iov_len) > resid)
|
|
cnt = resid;
|
|
if (copyin(iov->iov_base, cp, (unsigned)cnt))
|
|
goto done;
|
|
cp += cnt;
|
|
resid -= cnt;
|
|
iov++;
|
|
}
|
|
kth->ktr_buf = (caddr_t)ktp;
|
|
kth->ktr_len = sizeof(struct ktr_genio) + len;
|
|
|
|
ktrwrite(p, v, kth);
|
|
done:
|
|
FREE(kth, M_TEMP);
|
|
FREE(ktp, M_TEMP);
|
|
p->p_traceflag &= ~KTRFAC_ACTIVE;
|
|
}
|
|
|
|
void
|
|
ktrpsig(v, sig, action, mask, code)
|
|
void *v;
|
|
int sig;
|
|
sig_t action;
|
|
sigset_t *mask;
|
|
int code;
|
|
{
|
|
struct ktr_header *kth;
|
|
struct ktr_psig kp;
|
|
struct proc *p = curproc; /* XXX */
|
|
|
|
p->p_traceflag |= KTRFAC_ACTIVE;
|
|
kth = ktrgetheader(KTR_PSIG);
|
|
kp.signo = (char)sig;
|
|
kp.action = action;
|
|
kp.mask = *mask;
|
|
kp.code = code;
|
|
kth->ktr_buf = (caddr_t)&kp;
|
|
kth->ktr_len = sizeof(struct ktr_psig);
|
|
|
|
ktrwrite(p, v, kth);
|
|
FREE(kth, M_TEMP);
|
|
p->p_traceflag &= ~KTRFAC_ACTIVE;
|
|
}
|
|
|
|
void
|
|
ktrcsw(v, out, user)
|
|
void *v;
|
|
int out, user;
|
|
{
|
|
struct ktr_header *kth;
|
|
struct ktr_csw kc;
|
|
struct proc *p = curproc; /* XXX */
|
|
|
|
p->p_traceflag |= KTRFAC_ACTIVE;
|
|
kth = ktrgetheader(KTR_CSW);
|
|
kc.out = out;
|
|
kc.user = user;
|
|
kth->ktr_buf = (caddr_t)&kc;
|
|
kth->ktr_len = sizeof(struct ktr_csw);
|
|
|
|
ktrwrite(p, v, kth);
|
|
FREE(kth, M_TEMP);
|
|
p->p_traceflag &= ~KTRFAC_ACTIVE;
|
|
}
|
|
|
|
/* Interface and common routines */
|
|
|
|
/*
|
|
* ktrace system call
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_fktrace(curp, v, retval)
|
|
struct proc *curp;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_fktrace_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(int) ops;
|
|
syscallarg(int) facs;
|
|
syscallarg(int) pid;
|
|
} */ *uap = v;
|
|
struct file *fp = NULL;
|
|
struct proc *p;
|
|
struct filedesc *fdp = curp->p_fd;
|
|
struct pgrp *pg;
|
|
int facs;
|
|
int ops;
|
|
int descend;
|
|
int ret = 0;
|
|
int error = 0;
|
|
|
|
if (((u_int)SCARG(uap, fd)) >= fdp->fd_nfiles ||
|
|
(fp = fdp->fd_ofiles[SCARG(uap, fd)]) == NULL ||
|
|
(fp->f_flag & FWRITE) == 0)
|
|
return (EBADF);
|
|
|
|
ops = KTROP(SCARG(uap, ops)) | KTRFLAG_FD;
|
|
descend = SCARG(uap, ops) & KTRFLAG_DESCEND;
|
|
facs = SCARG(uap, facs) & ~((unsigned) KTRFAC_ROOT);
|
|
curp->p_traceflag |= KTRFAC_ACTIVE;
|
|
|
|
/*
|
|
* Clear all uses of the tracefile
|
|
*/
|
|
if (KTROP(ops) == KTROP_CLEARFILE) {
|
|
for (p = allproc.lh_first; p != 0; p = p->p_list.le_next) {
|
|
if (p->p_tracep == fp) {
|
|
if (ktrcanset(curp, p))
|
|
ktrderef(p);
|
|
else
|
|
error = EPERM;
|
|
}
|
|
}
|
|
goto done;
|
|
}
|
|
/*
|
|
* need something to (un)trace (XXX - why is this here?)
|
|
*/
|
|
if (!facs) {
|
|
error = EINVAL;
|
|
goto done;
|
|
}
|
|
/*
|
|
* do it
|
|
*/
|
|
if (SCARG(uap, pid) < 0) {
|
|
/*
|
|
* by process group
|
|
*/
|
|
pg = pgfind(-SCARG(uap, pid));
|
|
if (pg == NULL) {
|
|
error = ESRCH;
|
|
goto done;
|
|
}
|
|
for (p = pg->pg_members.lh_first; p != 0; p = p->p_pglist.le_next)
|
|
if (descend)
|
|
ret |= ktrsetchildren(curp, p, ops, facs, fp);
|
|
else
|
|
ret |= ktrops(curp, p, ops, facs, fp);
|
|
|
|
} else {
|
|
/*
|
|
* by pid
|
|
*/
|
|
p = pfind(SCARG(uap, pid));
|
|
if (p == NULL) {
|
|
error = ESRCH;
|
|
goto done;
|
|
}
|
|
if (descend)
|
|
ret |= ktrsetchildren(curp, p, ops, facs, fp);
|
|
else
|
|
ret |= ktrops(curp, p, ops, facs, fp);
|
|
}
|
|
if (!ret)
|
|
error = EPERM;
|
|
done:
|
|
curp->p_traceflag &= ~KTRFAC_ACTIVE;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* ktrace system call
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
sys_ktrace(curp, v, retval)
|
|
struct proc *curp;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct sys_ktrace_args /* {
|
|
syscallarg(const char *) fname;
|
|
syscallarg(int) ops;
|
|
syscallarg(int) facs;
|
|
syscallarg(int) pid;
|
|
} */ *uap = v;
|
|
struct vnode *vp = NULL;
|
|
struct proc *p;
|
|
struct pgrp *pg;
|
|
int facs = SCARG(uap, facs) & ~((unsigned) KTRFAC_ROOT);
|
|
int ops = KTROP(SCARG(uap, ops));
|
|
int descend = SCARG(uap, ops) & KTRFLAG_DESCEND;
|
|
int ret = 0;
|
|
int error = 0;
|
|
struct nameidata nd;
|
|
|
|
curp->p_traceflag |= KTRFAC_ACTIVE;
|
|
if (ops != KTROP_CLEAR) {
|
|
/*
|
|
* an operation which requires a file argument.
|
|
*/
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, fname),
|
|
curp);
|
|
if ((error = vn_open(&nd, FREAD|FWRITE, 0)) != 0) {
|
|
curp->p_traceflag &= ~KTRFAC_ACTIVE;
|
|
return (error);
|
|
}
|
|
vp = nd.ni_vp;
|
|
VOP_UNLOCK(vp, 0);
|
|
if (vp->v_type != VREG) {
|
|
(void) vn_close(vp, FREAD|FWRITE, curp->p_ucred, curp);
|
|
curp->p_traceflag &= ~KTRFAC_ACTIVE;
|
|
return (EACCES);
|
|
}
|
|
}
|
|
/*
|
|
* Clear all uses of the tracefile
|
|
*/
|
|
if (KTROP(ops) == KTROP_CLEARFILE) {
|
|
for (p = allproc.lh_first; p != 0; p = p->p_list.le_next) {
|
|
if (p->p_tracep == vp &&
|
|
!ktrops(curp, p, KTROP_CLEAR, ~0, vp))
|
|
error = EPERM;
|
|
}
|
|
goto done;
|
|
}
|
|
/*
|
|
* need something to (un)trace (XXX - why is this here?)
|
|
*/
|
|
if (!facs) {
|
|
error = EINVAL;
|
|
goto done;
|
|
}
|
|
/*
|
|
* do it
|
|
*/
|
|
if (SCARG(uap, pid) < 0) {
|
|
/*
|
|
* by process group
|
|
*/
|
|
pg = pgfind(-SCARG(uap, pid));
|
|
if (pg == NULL) {
|
|
error = ESRCH;
|
|
goto done;
|
|
}
|
|
for (p = pg->pg_members.lh_first; p != 0; p = p->p_pglist.le_next)
|
|
if (descend)
|
|
ret |= ktrsetchildren(curp, p, ops, facs, vp);
|
|
else
|
|
ret |= ktrops(curp, p, ops, facs, vp);
|
|
|
|
} else {
|
|
/*
|
|
* by pid
|
|
*/
|
|
p = pfind(SCARG(uap, pid));
|
|
if (p == NULL) {
|
|
error = ESRCH;
|
|
goto done;
|
|
}
|
|
if (descend)
|
|
ret |= ktrsetchildren(curp, p, ops, facs, vp);
|
|
else
|
|
ret |= ktrops(curp, p, ops, facs, vp);
|
|
}
|
|
if (!ret)
|
|
error = EPERM;
|
|
done:
|
|
if (vp != NULL)
|
|
(void) vn_close(vp, FWRITE, curp->p_ucred, curp);
|
|
curp->p_traceflag &= ~KTRFAC_ACTIVE;
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
ktrops(curp, p, ops, facs, v)
|
|
struct proc *p, *curp;
|
|
int ops, facs;
|
|
void *v;
|
|
{
|
|
|
|
if (!ktrcanset(curp, p))
|
|
return (0);
|
|
if (KTROP(ops) == KTROP_SET) {
|
|
if (p->p_tracep != v) {
|
|
/*
|
|
* if trace file already in use, relinquish
|
|
*/
|
|
ktrderef(p);
|
|
if (ops & KTRFLAG_FD)
|
|
p->p_traceflag = KTRFAC_FD;
|
|
p->p_tracep = v;
|
|
ktradref(p);
|
|
}
|
|
p->p_traceflag |= facs;
|
|
if (curp->p_ucred->cr_uid == 0)
|
|
p->p_traceflag |= KTRFAC_ROOT;
|
|
} else {
|
|
/* KTROP_CLEAR */
|
|
if (((p->p_traceflag &= ~facs) & KTRFAC_MASK) == 0) {
|
|
/* no more tracing */
|
|
ktrderef(p);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Emit an emulation record, every time there is a ktrace
|
|
* change/attach request.
|
|
*/
|
|
if (KTRPOINT(p, KTR_EMUL))
|
|
ktremul(p->p_tracep, p, p->p_emul->e_name);
|
|
|
|
return (1);
|
|
}
|
|
|
|
int
|
|
ktrsetchildren(curp, top, ops, facs, v)
|
|
struct proc *curp, *top;
|
|
int ops, facs;
|
|
void *v;
|
|
{
|
|
struct proc *p;
|
|
int ret = 0;
|
|
|
|
p = top;
|
|
for (;;) {
|
|
ret |= ktrops(curp, p, ops, facs, v);
|
|
/*
|
|
* If this process has children, descend to them next,
|
|
* otherwise do any siblings, and if done with this level,
|
|
* follow back up the tree (but not past top).
|
|
*/
|
|
if (p->p_children.lh_first)
|
|
p = p->p_children.lh_first;
|
|
else for (;;) {
|
|
if (p == top)
|
|
return (ret);
|
|
if (p->p_sibling.le_next) {
|
|
p = p->p_sibling.le_next;
|
|
break;
|
|
}
|
|
p = p->p_pptr;
|
|
}
|
|
}
|
|
/*NOTREACHED*/
|
|
}
|
|
|
|
void
|
|
ktrwrite(p, v, kth)
|
|
struct proc *p;
|
|
void *v;
|
|
struct ktr_header *kth;
|
|
{
|
|
struct uio auio;
|
|
struct iovec aiov[2];
|
|
int error;
|
|
|
|
if (v == NULL)
|
|
return;
|
|
auio.uio_iov = &aiov[0];
|
|
auio.uio_offset = 0;
|
|
auio.uio_segflg = UIO_SYSSPACE;
|
|
auio.uio_rw = UIO_WRITE;
|
|
aiov[0].iov_base = (caddr_t)kth;
|
|
aiov[0].iov_len = sizeof(struct ktr_header);
|
|
auio.uio_resid = sizeof(struct ktr_header);
|
|
auio.uio_iovcnt = 1;
|
|
auio.uio_procp = (struct proc *)0;
|
|
if (kth->ktr_len > 0) {
|
|
auio.uio_iovcnt++;
|
|
aiov[1].iov_base = kth->ktr_buf;
|
|
aiov[1].iov_len = kth->ktr_len;
|
|
auio.uio_resid += kth->ktr_len;
|
|
}
|
|
if (p->p_traceflag & KTRFAC_FD) {
|
|
struct file *fp = v;
|
|
|
|
FILE_USE(fp);
|
|
error = (*fp->f_ops->fo_write)(fp, &fp->f_offset, &auio,
|
|
fp->f_cred, FOF_UPDATE_OFFSET);
|
|
FILE_UNUSE(fp, NULL);
|
|
}
|
|
else {
|
|
struct vnode *vp = v;
|
|
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
error = VOP_WRITE(vp, &auio, IO_UNIT|IO_APPEND, p->p_ucred);
|
|
VOP_UNLOCK(vp, 0);
|
|
}
|
|
if (!error)
|
|
return;
|
|
/*
|
|
* If error encountered, give up tracing on this vnode.
|
|
*/
|
|
log(LOG_NOTICE, "ktrace write failed, errno %d, tracing stopped\n",
|
|
error);
|
|
for (p = allproc.lh_first; p != 0; p = p->p_list.le_next) {
|
|
if (p->p_tracep == v)
|
|
ktrderef(p);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Return true if caller has permission to set the ktracing state
|
|
* of target. Essentially, the target can't possess any
|
|
* more permissions than the caller. KTRFAC_ROOT signifies that
|
|
* root previously set the tracing status on the target process, and
|
|
* so, only root may further change it.
|
|
*
|
|
* TODO: check groups. use caller effective gid.
|
|
*/
|
|
int
|
|
ktrcanset(callp, targetp)
|
|
struct proc *callp, *targetp;
|
|
{
|
|
struct pcred *caller = callp->p_cred;
|
|
struct pcred *target = targetp->p_cred;
|
|
|
|
if ((caller->pc_ucred->cr_uid == target->p_ruid &&
|
|
target->p_ruid == target->p_svuid &&
|
|
caller->p_rgid == target->p_rgid && /* XXX */
|
|
target->p_rgid == target->p_svgid &&
|
|
(targetp->p_traceflag & KTRFAC_ROOT) == 0) ||
|
|
caller->pc_ucred->cr_uid == 0)
|
|
return (1);
|
|
|
|
return (0);
|
|
}
|
|
|
|
#endif
|