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- /*
- * Copyright (c) 1982, 1986, 1989 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_kinfo.c 7.17 (Berkeley) 6/26/91
- */
-
- #include "param.h"
- #include "proc.h"
- #include "kinfo.h"
- #include "ioctl.h"
- #include "tty.h"
- #include "buf.h"
- #include "file.h"
-
- #include "vm/vm.h"
-
- #include "kinfo_proc.h"
-
- #define snderr(e) { error = (e); goto release;}
- extern int kinfo_doproc(), kinfo_rtable(), kinfo_vnode(), kinfo_file();
- struct kinfo_lock kinfo_lock;
-
- /* ARGSUSED */
- getkerninfo(p, uap, retval)
- struct proc *p;
- register struct args {
- int op;
- char *where;
- int *size;
- int arg;
- } *uap;
- int *retval;
- {
-
- int bufsize; /* max size of users buffer */
- int needed, locked, (*server)(), error = 0;
-
- if (error = copyin((caddr_t)uap->size, (caddr_t)&bufsize,
- sizeof (bufsize)))
- goto done;
-
- switch (ki_type(uap->op)) {
-
- case KINFO_PROC:
- server = kinfo_doproc;
- break;
-
- case KINFO_RT:
- server = kinfo_rtable;
- break;
-
- case KINFO_VNODE:
- server = kinfo_vnode;
- break;
-
- case KINFO_FILE:
- server = kinfo_file;
- break;
-
- default:
- error = EINVAL;
- goto done;
- }
- if (uap->where == NULL || uap->size == NULL) {
- error = (*server)(uap->op, NULL, NULL, uap->arg, &needed);
- goto done;
- }
- while (kinfo_lock.kl_lock) {
- kinfo_lock.kl_want++;
- sleep(&kinfo_lock, PRIBIO+1);
- kinfo_lock.kl_want--;
- kinfo_lock.kl_locked++;
- }
- kinfo_lock.kl_lock++;
-
- if (!useracc(uap->where, bufsize, B_WRITE))
- snderr(EFAULT);
- if (server != kinfo_vnode) /* XXX */
- vslock(uap->where, bufsize);
- locked = bufsize;
- error = (*server)(uap->op, uap->where, &bufsize, uap->arg, &needed);
- if (server != kinfo_vnode) /* XXX */
- vsunlock(uap->where, locked, B_WRITE);
- if (error == 0)
- error = copyout((caddr_t)&bufsize,
- (caddr_t)uap->size, sizeof (bufsize));
- release:
- kinfo_lock.kl_lock--;
- if (kinfo_lock.kl_want)
- wakeup(&kinfo_lock);
- done:
- if (!error)
- *retval = needed;
- return (error);
- }
-
- /*
- * try over estimating by 5 procs
- */
- #define KINFO_PROCSLOP (5 * sizeof (struct kinfo_proc))
-
- kinfo_doproc(op, where, acopysize, arg, aneeded)
- char *where;
- int *acopysize, *aneeded;
- {
- register struct proc *p;
- register struct kinfo_proc *dp = (struct kinfo_proc *)where;
- register needed = 0;
- int buflen;
- int doingzomb;
- struct eproc eproc;
- int error = 0;
-
- if (where != NULL)
- buflen = *acopysize;
-
- p = allproc;
- doingzomb = 0;
- again:
- for (; p != NULL; p = p->p_nxt) {
- /*
- * TODO - make more efficient (see notes below).
- * do by session.
- */
- switch (ki_op(op)) {
-
- case KINFO_PROC_PID:
- /* could do this with just a lookup */
- if (p->p_pid != (pid_t)arg)
- continue;
- break;
-
- case KINFO_PROC_PGRP:
- /* could do this by traversing pgrp */
- if (p->p_pgrp->pg_id != (pid_t)arg)
- continue;
- break;
-
- case KINFO_PROC_TTY:
- if ((p->p_flag&SCTTY) == 0 ||
- p->p_session->s_ttyp == NULL ||
- p->p_session->s_ttyp->t_dev != (dev_t)arg)
- continue;
- break;
-
- case KINFO_PROC_UID:
- if (p->p_ucred->cr_uid != (uid_t)arg)
- continue;
- break;
-
- case KINFO_PROC_RUID:
- if (p->p_cred->p_ruid != (uid_t)arg)
- continue;
- break;
- }
- if (where != NULL && buflen >= sizeof (struct kinfo_proc)) {
- fill_eproc(p, &eproc);
- if (error = copyout((caddr_t)p, &dp->kp_proc,
- sizeof (struct proc)))
- return (error);
- if (error = copyout((caddr_t)&eproc, &dp->kp_eproc,
- sizeof (eproc)))
- return (error);
- dp++;
- buflen -= sizeof (struct kinfo_proc);
- }
- needed += sizeof (struct kinfo_proc);
- }
- if (doingzomb == 0) {
- p = zombproc;
- doingzomb++;
- goto again;
- }
- if (where != NULL)
- *acopysize = (caddr_t)dp - where;
- else
- needed += KINFO_PROCSLOP;
- *aneeded = needed;
-
- return (0);
- }
-
- /*
- * Fill in an eproc structure for the specified process.
- */
- void
- fill_eproc(p, ep)
- register struct proc *p;
- register struct eproc *ep;
- {
- register struct tty *tp;
-
- ep->e_paddr = p;
- ep->e_sess = p->p_pgrp->pg_session;
- ep->e_pcred = *p->p_cred;
- ep->e_ucred = *p->p_ucred;
- ep->e_vm = *p->p_vmspace;
- if (p->p_pptr)
- ep->e_ppid = p->p_pptr->p_pid;
- else
- ep->e_ppid = 0;
- ep->e_pgid = p->p_pgrp->pg_id;
- ep->e_jobc = p->p_pgrp->pg_jobc;
- if ((p->p_flag&SCTTY) &&
- (tp = ep->e_sess->s_ttyp)) {
- ep->e_tdev = tp->t_dev;
- ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID;
- ep->e_tsess = tp->t_session;
- } else
- ep->e_tdev = NODEV;
- ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0;
- if (SESS_LEADER(p))
- ep->e_flag |= EPROC_SLEADER;
- if (p->p_wmesg)
- strncpy(ep->e_wmesg, p->p_wmesg, WMESGLEN);
- ep->e_xsize = ep->e_xrssize = 0;
- ep->e_xccount = ep->e_xswrss = 0;
- }
-
- /*
- * Get file structures.
- */
- kinfo_file(op, where, acopysize, arg, aneeded)
- register char *where;
- int *acopysize, *aneeded;
- {
- int buflen, needed, error;
- struct file *fp;
- char *start = where;
-
- if (where == NULL) {
- /*
- * overestimate by 10 files
- */
- *aneeded = sizeof (filehead) +
- (nfiles + 10) * sizeof (struct file);
- return (0);
- }
- buflen = *acopysize;
- needed = 0;
-
- /*
- * first copyout filehead
- */
- if (buflen > sizeof (filehead)) {
- if (error = copyout((caddr_t)&filehead, where,
- sizeof (filehead)))
- return (error);
- buflen -= sizeof (filehead);
- where += sizeof (filehead);
- }
- needed += sizeof (filehead);
-
- /*
- * followed by an array of file structures
- */
- for (fp = filehead; fp != NULL; fp = fp->f_filef) {
- if (buflen > sizeof (struct file)) {
- if (error = copyout((caddr_t)fp, where,
- sizeof (struct file)))
- return (error);
- buflen -= sizeof (struct file);
- where += sizeof (struct file);
- }
- needed += sizeof (struct file);
- }
- *acopysize = where - start;
- *aneeded = needed;
-
- return (0);
- }
-