312 lines
7.4 KiB
C
312 lines
7.4 KiB
C
/*
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* Copyright (c) 1982, 1986, 1989 Regents of the University of California.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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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* from: @(#)kern_kinfo.c 7.17 (Berkeley) 6/26/91
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* $Id: kern_kinfo.c,v 1.5 1993/06/27 06:01:36 andrew Exp $
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*/
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#include "param.h"
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#include "systm.h"
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#include "proc.h"
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#include "kinfo.h"
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#include "ioctl.h"
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#include "tty.h"
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#include "buf.h"
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#include "file.h"
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#include "vm/vm.h"
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#include "kinfo_proc.h"
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#define snderr(e) { error = (e); goto release;}
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extern int kinfo_doproc(), kinfo_rtable(), kinfo_vnode(), kinfo_file();
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struct kinfo_lock kinfo_lock;
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/* ARGSUSED */
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int
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getkerninfo(p, uap, retval)
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struct proc *p;
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register struct args {
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int op;
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char *where;
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int *size;
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int arg;
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} *uap;
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int *retval;
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{
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int bufsize; /* max size of users buffer */
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int needed, locked, (*server)(), error = 0;
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switch (ki_type(uap->op)) {
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case KINFO_PROC:
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server = kinfo_doproc;
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break;
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case KINFO_RT:
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server = kinfo_rtable;
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break;
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case KINFO_VNODE:
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server = kinfo_vnode;
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break;
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case KINFO_FILE:
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server = kinfo_file;
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break;
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default:
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error = EINVAL;
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goto done;
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}
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if (uap->where == NULL || uap->size == NULL) {
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error = (*server)(uap->op, NULL, NULL, uap->arg, &needed);
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goto done;
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}
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if (error = copyin((caddr_t)uap->size, (caddr_t)&bufsize,
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sizeof (bufsize)))
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goto done;
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while (kinfo_lock.kl_lock) {
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kinfo_lock.kl_want++;
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sleep((caddr_t)&kinfo_lock, PRIBIO+1);
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kinfo_lock.kl_want--;
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kinfo_lock.kl_locked++;
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}
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kinfo_lock.kl_lock++;
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if (!useracc(uap->where, bufsize, B_WRITE))
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snderr(EFAULT);
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if (server != kinfo_vnode) /* XXX */
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vslock(uap->where, bufsize);
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locked = bufsize;
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error = (*server)(uap->op, uap->where, &bufsize, uap->arg, &needed);
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if (server != kinfo_vnode) /* XXX */
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vsunlock(uap->where, locked, B_WRITE);
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if (error == 0)
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error = copyout((caddr_t)&bufsize,
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(caddr_t)uap->size, sizeof (bufsize));
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release:
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kinfo_lock.kl_lock--;
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if (kinfo_lock.kl_want)
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wakeup((caddr_t)&kinfo_lock);
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done:
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if (!error)
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*retval = needed;
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return (error);
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}
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/*
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* try over estimating by 5 procs
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*/
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#define KINFO_PROCSLOP (5 * sizeof (struct kinfo_proc))
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int
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kinfo_doproc(op, where, acopysize, arg, aneeded)
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int op;
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char *where;
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int *acopysize, *aneeded;
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int arg;
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{
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register struct proc *p;
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register struct kinfo_proc *dp = (struct kinfo_proc *)where;
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register needed = 0;
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int buflen;
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int doingzomb;
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struct eproc eproc;
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int error = 0;
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if (where != NULL)
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buflen = *acopysize;
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p = allproc;
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doingzomb = 0;
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again:
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for (; p != NULL; p = p->p_nxt) {
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/*
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* TODO - make more efficient (see notes below).
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* do by session.
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*/
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switch (ki_op(op)) {
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case KINFO_PROC_PID:
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/* could do this with just a lookup */
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if (p->p_pid != (pid_t)arg)
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continue;
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break;
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case KINFO_PROC_PGRP:
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/* could do this by traversing pgrp */
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if (p->p_pgrp->pg_id != (pid_t)arg)
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continue;
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break;
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case KINFO_PROC_TTY:
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if ((p->p_flag&SCTTY) == 0 ||
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p->p_session->s_ttyp == NULL ||
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p->p_session->s_ttyp->t_dev != (dev_t)arg)
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continue;
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break;
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case KINFO_PROC_UID:
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if (p->p_ucred->cr_uid != (uid_t)arg)
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continue;
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break;
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case KINFO_PROC_RUID:
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if (p->p_cred->p_ruid != (uid_t)arg)
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continue;
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break;
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}
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if (where != NULL && buflen >= sizeof (struct kinfo_proc)) {
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fill_eproc(p, &eproc);
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if (error = copyout((caddr_t)p, &dp->kp_proc,
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sizeof (struct proc)))
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return (error);
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if (error = copyout((caddr_t)&eproc, &dp->kp_eproc,
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sizeof (eproc)))
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return (error);
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dp++;
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buflen -= sizeof (struct kinfo_proc);
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}
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needed += sizeof (struct kinfo_proc);
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}
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if (doingzomb == 0) {
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p = zombproc;
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doingzomb++;
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goto again;
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}
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if (where != NULL)
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*acopysize = (caddr_t)dp - where;
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else
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needed += KINFO_PROCSLOP;
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*aneeded = needed;
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return (0);
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}
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/*
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* Fill in an eproc structure for the specified process.
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*/
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void
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fill_eproc(p, ep)
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register struct proc *p;
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register struct eproc *ep;
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{
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register struct tty *tp;
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ep->e_paddr = p;
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ep->e_sess = p->p_pgrp->pg_session;
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ep->e_pcred = *p->p_cred;
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ep->e_ucred = *p->p_ucred;
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ep->e_vm = *p->p_vmspace;
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if (p->p_pptr)
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ep->e_ppid = p->p_pptr->p_pid;
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else
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ep->e_ppid = 0;
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ep->e_pgid = p->p_pgrp->pg_id;
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ep->e_jobc = p->p_pgrp->pg_jobc;
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if ((p->p_flag&SCTTY) &&
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(tp = ep->e_sess->s_ttyp)) {
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ep->e_tdev = tp->t_dev;
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ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID;
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ep->e_tsess = tp->t_session;
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} else
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ep->e_tdev = NODEV;
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ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0;
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if (SESS_LEADER(p))
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ep->e_flag |= EPROC_SLEADER;
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if (p->p_wmesg)
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strncpy(ep->e_wmesg, p->p_wmesg, WMESGLEN);
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ep->e_xsize = ep->e_xrssize = 0;
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ep->e_xccount = ep->e_xswrss = 0;
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}
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/*
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* Get file structures.
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*/
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int
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kinfo_file(op, where, acopysize, arg, aneeded)
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int op;
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register char *where;
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int *acopysize, *aneeded;
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int arg;
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{
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int buflen, needed, error;
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struct file *fp;
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char *start = where;
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if (where == NULL) {
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/*
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* overestimate by 10 files
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*/
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*aneeded = sizeof (filehead) +
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(nfiles + 10) * sizeof (struct file);
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return (0);
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}
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buflen = *acopysize;
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needed = 0;
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/*
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* first copyout filehead
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*/
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if (buflen > sizeof (filehead)) {
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if (error = copyout((caddr_t)&filehead, where,
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sizeof (filehead)))
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return (error);
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buflen -= sizeof (filehead);
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where += sizeof (filehead);
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}
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needed += sizeof (filehead);
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/*
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* followed by an array of file structures
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*/
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for (fp = filehead; fp != NULL; fp = fp->f_filef) {
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if (buflen > sizeof (struct file)) {
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if (error = copyout((caddr_t)fp, where,
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sizeof (struct file)))
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return (error);
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buflen -= sizeof (struct file);
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where += sizeof (struct file);
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}
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needed += sizeof (struct file);
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}
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*acopysize = where - start;
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*aneeded = needed;
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return (0);
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}
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