588 lines
14 KiB
C
588 lines
14 KiB
C
/*
|
|
* Copyright (c) 1982, 1986, 1989, 1991, 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_proc.c 8.7 (Berkeley) 2/14/95
|
|
* $Id: kern_proc.c,v 1.27 1997/06/27 15:42:05 tegge Exp $
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/tty.h>
|
|
#include <sys/signalvar.h>
|
|
#include <vm/vm.h>
|
|
#include <sys/lock.h>
|
|
#include <vm/pmap.h>
|
|
#include <vm/vm_map.h>
|
|
#include <sys/user.h>
|
|
|
|
struct prochd qs[NQS]; /* as good a place as any... */
|
|
struct prochd rtqs[NQS]; /* Space for REALTIME queues too */
|
|
struct prochd idqs[NQS]; /* Space for IDLE queues too */
|
|
|
|
static void pgdelete __P((struct pgrp *));
|
|
|
|
/*
|
|
* Structure associated with user cacheing.
|
|
*/
|
|
struct uidinfo {
|
|
LIST_ENTRY(uidinfo) ui_hash;
|
|
uid_t ui_uid;
|
|
long ui_proccnt;
|
|
};
|
|
#define UIHASH(uid) (&uihashtbl[(uid) & uihash])
|
|
LIST_HEAD(uihashhead, uidinfo) *uihashtbl;
|
|
static u_long uihash; /* size of hash table - 1 */
|
|
|
|
static void orphanpg __P((struct pgrp *pg));
|
|
|
|
/*
|
|
* Other process lists
|
|
*/
|
|
struct pidhashhead *pidhashtbl;
|
|
u_long pidhash;
|
|
struct pgrphashhead *pgrphashtbl;
|
|
u_long pgrphash;
|
|
struct proclist allproc;
|
|
struct proclist zombproc;
|
|
|
|
/*
|
|
* Initialize global process hashing structures.
|
|
*/
|
|
void
|
|
procinit()
|
|
{
|
|
|
|
LIST_INIT(&allproc);
|
|
LIST_INIT(&zombproc);
|
|
pidhashtbl = hashinit(maxproc / 4, M_PROC, &pidhash);
|
|
pgrphashtbl = hashinit(maxproc / 4, M_PROC, &pgrphash);
|
|
uihashtbl = hashinit(maxproc / 16, M_PROC, &uihash);
|
|
}
|
|
|
|
/*
|
|
* Change the count associated with number of processes
|
|
* a given user is using.
|
|
*/
|
|
int
|
|
chgproccnt(uid, diff)
|
|
uid_t uid;
|
|
int diff;
|
|
{
|
|
register struct uidinfo *uip;
|
|
register struct uihashhead *uipp;
|
|
|
|
uipp = UIHASH(uid);
|
|
for (uip = uipp->lh_first; uip != 0; uip = uip->ui_hash.le_next)
|
|
if (uip->ui_uid == uid)
|
|
break;
|
|
if (uip) {
|
|
uip->ui_proccnt += diff;
|
|
if (uip->ui_proccnt > 0)
|
|
return (uip->ui_proccnt);
|
|
if (uip->ui_proccnt < 0)
|
|
panic("chgproccnt: procs < 0");
|
|
LIST_REMOVE(uip, ui_hash);
|
|
FREE(uip, M_PROC);
|
|
return (0);
|
|
}
|
|
if (diff <= 0) {
|
|
if (diff == 0)
|
|
return(0);
|
|
panic("chgproccnt: lost user");
|
|
}
|
|
MALLOC(uip, struct uidinfo *, sizeof(*uip), M_PROC, M_WAITOK);
|
|
LIST_INSERT_HEAD(uipp, uip, ui_hash);
|
|
uip->ui_uid = uid;
|
|
uip->ui_proccnt = diff;
|
|
return (diff);
|
|
}
|
|
|
|
/*
|
|
* Is p an inferior of the current process?
|
|
*/
|
|
int
|
|
inferior(p)
|
|
register struct proc *p;
|
|
{
|
|
|
|
for (; p != curproc; p = p->p_pptr)
|
|
if (p->p_pid == 0)
|
|
return (0);
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Locate a process by number
|
|
*/
|
|
struct proc *
|
|
pfind(pid)
|
|
register pid_t pid;
|
|
{
|
|
register struct proc *p;
|
|
|
|
for (p = PIDHASH(pid)->lh_first; p != 0; p = p->p_hash.le_next)
|
|
if (p->p_pid == pid)
|
|
return (p);
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Locate a process group by number
|
|
*/
|
|
struct pgrp *
|
|
pgfind(pgid)
|
|
register pid_t pgid;
|
|
{
|
|
register struct pgrp *pgrp;
|
|
|
|
for (pgrp = PGRPHASH(pgid)->lh_first; pgrp != 0;
|
|
pgrp = pgrp->pg_hash.le_next)
|
|
if (pgrp->pg_id == pgid)
|
|
return (pgrp);
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Move p to a new or existing process group (and session)
|
|
*/
|
|
int
|
|
enterpgrp(p, pgid, mksess)
|
|
register struct proc *p;
|
|
pid_t pgid;
|
|
int mksess;
|
|
{
|
|
register struct pgrp *pgrp = pgfind(pgid);
|
|
|
|
#ifdef DIAGNOSTIC
|
|
if (pgrp != NULL && mksess) /* firewalls */
|
|
panic("enterpgrp: setsid into non-empty pgrp");
|
|
if (SESS_LEADER(p))
|
|
panic("enterpgrp: session leader attempted setpgrp");
|
|
#endif
|
|
if (pgrp == NULL) {
|
|
pid_t savepid = p->p_pid;
|
|
struct proc *np;
|
|
/*
|
|
* new process group
|
|
*/
|
|
#ifdef DIAGNOSTIC
|
|
if (p->p_pid != pgid)
|
|
panic("enterpgrp: new pgrp and pid != pgid");
|
|
#endif
|
|
MALLOC(pgrp, struct pgrp *, sizeof(struct pgrp), M_PGRP,
|
|
M_WAITOK);
|
|
if ((np = pfind(savepid)) == NULL || np != p)
|
|
return (ESRCH);
|
|
if (mksess) {
|
|
register struct session *sess;
|
|
|
|
/*
|
|
* new session
|
|
*/
|
|
MALLOC(sess, struct session *, sizeof(struct session),
|
|
M_SESSION, M_WAITOK);
|
|
sess->s_leader = p;
|
|
sess->s_count = 1;
|
|
sess->s_ttyvp = NULL;
|
|
sess->s_ttyp = NULL;
|
|
bcopy(p->p_session->s_login, sess->s_login,
|
|
sizeof(sess->s_login));
|
|
p->p_flag &= ~P_CONTROLT;
|
|
pgrp->pg_session = sess;
|
|
#ifdef DIAGNOSTIC
|
|
if (p != curproc)
|
|
panic("enterpgrp: mksession and p != curproc");
|
|
#endif
|
|
} else {
|
|
pgrp->pg_session = p->p_session;
|
|
pgrp->pg_session->s_count++;
|
|
}
|
|
pgrp->pg_id = pgid;
|
|
LIST_INIT(&pgrp->pg_members);
|
|
LIST_INSERT_HEAD(PGRPHASH(pgid), pgrp, pg_hash);
|
|
pgrp->pg_jobc = 0;
|
|
} else if (pgrp == p->p_pgrp)
|
|
return (0);
|
|
|
|
/*
|
|
* Adjust eligibility of affected pgrps to participate in job control.
|
|
* Increment eligibility counts before decrementing, otherwise we
|
|
* could reach 0 spuriously during the first call.
|
|
*/
|
|
fixjobc(p, pgrp, 1);
|
|
fixjobc(p, p->p_pgrp, 0);
|
|
|
|
LIST_REMOVE(p, p_pglist);
|
|
if (p->p_pgrp->pg_members.lh_first == 0)
|
|
pgdelete(p->p_pgrp);
|
|
p->p_pgrp = pgrp;
|
|
LIST_INSERT_HEAD(&pgrp->pg_members, p, p_pglist);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* remove process from process group
|
|
*/
|
|
int
|
|
leavepgrp(p)
|
|
register struct proc *p;
|
|
{
|
|
|
|
LIST_REMOVE(p, p_pglist);
|
|
if (p->p_pgrp->pg_members.lh_first == 0)
|
|
pgdelete(p->p_pgrp);
|
|
p->p_pgrp = 0;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* delete a process group
|
|
*/
|
|
static void
|
|
pgdelete(pgrp)
|
|
register struct pgrp *pgrp;
|
|
{
|
|
|
|
if (pgrp->pg_session->s_ttyp != NULL &&
|
|
pgrp->pg_session->s_ttyp->t_pgrp == pgrp)
|
|
pgrp->pg_session->s_ttyp->t_pgrp = NULL;
|
|
LIST_REMOVE(pgrp, pg_hash);
|
|
if (--pgrp->pg_session->s_count == 0)
|
|
FREE(pgrp->pg_session, M_SESSION);
|
|
FREE(pgrp, M_PGRP);
|
|
}
|
|
|
|
/*
|
|
* Adjust pgrp jobc counters when specified process changes process group.
|
|
* We count the number of processes in each process group that "qualify"
|
|
* the group for terminal job control (those with a parent in a different
|
|
* process group of the same session). If that count reaches zero, the
|
|
* process group becomes orphaned. Check both the specified process'
|
|
* process group and that of its children.
|
|
* entering == 0 => p is leaving specified group.
|
|
* entering == 1 => p is entering specified group.
|
|
*/
|
|
void
|
|
fixjobc(p, pgrp, entering)
|
|
register struct proc *p;
|
|
register struct pgrp *pgrp;
|
|
int entering;
|
|
{
|
|
register struct pgrp *hispgrp;
|
|
register struct session *mysession = pgrp->pg_session;
|
|
|
|
/*
|
|
* Check p's parent to see whether p qualifies its own process
|
|
* group; if so, adjust count for p's process group.
|
|
*/
|
|
if ((hispgrp = p->p_pptr->p_pgrp) != pgrp &&
|
|
hispgrp->pg_session == mysession)
|
|
if (entering)
|
|
pgrp->pg_jobc++;
|
|
else if (--pgrp->pg_jobc == 0)
|
|
orphanpg(pgrp);
|
|
|
|
/*
|
|
* Check this process' children to see whether they qualify
|
|
* their process groups; if so, adjust counts for children's
|
|
* process groups.
|
|
*/
|
|
for (p = p->p_children.lh_first; p != 0; p = p->p_sibling.le_next)
|
|
if ((hispgrp = p->p_pgrp) != pgrp &&
|
|
hispgrp->pg_session == mysession &&
|
|
p->p_stat != SZOMB)
|
|
if (entering)
|
|
hispgrp->pg_jobc++;
|
|
else if (--hispgrp->pg_jobc == 0)
|
|
orphanpg(hispgrp);
|
|
}
|
|
|
|
/*
|
|
* A process group has become orphaned;
|
|
* if there are any stopped processes in the group,
|
|
* hang-up all process in that group.
|
|
*/
|
|
static void
|
|
orphanpg(pg)
|
|
struct pgrp *pg;
|
|
{
|
|
register struct proc *p;
|
|
|
|
for (p = pg->pg_members.lh_first; p != 0; p = p->p_pglist.le_next) {
|
|
if (p->p_stat == SSTOP) {
|
|
for (p = pg->pg_members.lh_first; p != 0;
|
|
p = p->p_pglist.le_next) {
|
|
psignal(p, SIGHUP);
|
|
psignal(p, SIGCONT);
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
#include "opt_ddb.h"
|
|
#ifdef DDB
|
|
#include <ddb/ddb.h>
|
|
|
|
DB_SHOW_COMMAND(pgrpdump, pgrpdump)
|
|
{
|
|
register struct pgrp *pgrp;
|
|
register struct proc *p;
|
|
register i;
|
|
|
|
for (i = 0; i <= pgrphash; i++) {
|
|
if (pgrp = pgrphashtbl[i].lh_first) {
|
|
printf("\tindx %d\n", i);
|
|
for (; pgrp != 0; pgrp = pgrp->pg_hash.le_next) {
|
|
printf("\tpgrp %x, pgid %d, sess %x, sesscnt %d, mem %x\n",
|
|
pgrp, pgrp->pg_id, pgrp->pg_session,
|
|
pgrp->pg_session->s_count,
|
|
pgrp->pg_members.lh_first);
|
|
for (p = pgrp->pg_members.lh_first; p != 0;
|
|
p = p->p_pglist.le_next) {
|
|
printf("\t\tpid %d addr %x pgrp %x\n",
|
|
p->p_pid, p, p->p_pgrp);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#endif /* DDB */
|
|
|
|
/*
|
|
* 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;
|
|
|
|
bzero(ep, sizeof(*ep));
|
|
|
|
ep->e_paddr = p;
|
|
if (p->p_cred) {
|
|
ep->e_pcred = *p->p_cred;
|
|
if (p->p_ucred)
|
|
ep->e_ucred = *p->p_ucred;
|
|
}
|
|
if (p->p_stat != SIDL && p->p_stat != SZOMB && p->p_vmspace != NULL) {
|
|
register struct vmspace *vm = p->p_vmspace;
|
|
|
|
#ifdef pmap_resident_count
|
|
ep->e_vm.vm_rssize = pmap_resident_count(&vm->vm_pmap); /*XXX*/
|
|
#else
|
|
ep->e_vm.vm_rssize = vm->vm_rssize;
|
|
#endif
|
|
ep->e_vm.vm_tsize = vm->vm_tsize;
|
|
ep->e_vm.vm_dsize = vm->vm_dsize;
|
|
ep->e_vm.vm_ssize = vm->vm_ssize;
|
|
ep->e_vm.vm_taddr = vm->vm_taddr;
|
|
ep->e_vm.vm_daddr = vm->vm_daddr;
|
|
ep->e_vm.vm_minsaddr = vm->vm_minsaddr;
|
|
ep->e_vm.vm_maxsaddr = vm->vm_maxsaddr;
|
|
#ifndef sparc
|
|
ep->e_vm.vm_pmap = vm->vm_pmap;
|
|
#endif
|
|
}
|
|
if (p->p_pptr)
|
|
ep->e_ppid = p->p_pptr->p_pid;
|
|
if (p->p_pgrp) {
|
|
ep->e_pgid = p->p_pgrp->pg_id;
|
|
ep->e_jobc = p->p_pgrp->pg_jobc;
|
|
ep->e_sess = p->p_pgrp->pg_session;
|
|
|
|
if (ep->e_sess) {
|
|
bcopy(ep->e_sess->s_login, ep->e_login, sizeof(ep->e_login));
|
|
if (ep->e_sess->s_ttyvp)
|
|
ep->e_flag = EPROC_CTTY;
|
|
if (p->p_session && SESS_LEADER(p))
|
|
ep->e_flag |= EPROC_SLEADER;
|
|
}
|
|
}
|
|
if ((p->p_flag & P_CONTROLT) &&
|
|
(ep->e_sess != NULL) &&
|
|
((tp = ep->e_sess->s_ttyp) != NULL)) {
|
|
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;
|
|
if (p->p_wmesg) {
|
|
strncpy(ep->e_wmesg, p->p_wmesg, WMESGLEN);
|
|
ep->e_wmesg[WMESGLEN] = 0;
|
|
}
|
|
}
|
|
|
|
static struct proc *
|
|
zpfind(pid_t pid)
|
|
{
|
|
struct proc *p;
|
|
|
|
for (p = zombproc.lh_first; p != 0; p = p->p_list.le_next)
|
|
if (p->p_pid == pid)
|
|
return (p);
|
|
return (NULL);
|
|
}
|
|
|
|
|
|
static int
|
|
sysctl_out_proc(struct proc *p, struct sysctl_req *req, int doingzomb)
|
|
{
|
|
struct eproc eproc;
|
|
int error;
|
|
pid_t pid = p->p_pid;
|
|
|
|
fill_eproc(p, &eproc);
|
|
error = SYSCTL_OUT(req,(caddr_t)p, sizeof(struct proc));
|
|
if (error)
|
|
return (error);
|
|
error = SYSCTL_OUT(req,(caddr_t)&eproc, sizeof(eproc));
|
|
if (error)
|
|
return (error);
|
|
if (!doingzomb && pid && (pfind(pid) != p))
|
|
return EAGAIN;
|
|
if (doingzomb && zpfind(pid) != p)
|
|
return EAGAIN;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
sysctl_kern_proc SYSCTL_HANDLER_ARGS
|
|
{
|
|
int *name = (int*) arg1;
|
|
u_int namelen = arg2;
|
|
struct proc *p;
|
|
int doingzomb;
|
|
int error = 0;
|
|
|
|
if (oidp->oid_number == KERN_PROC_PID) {
|
|
if (namelen != 1)
|
|
return (EINVAL);
|
|
p = pfind((pid_t)name[0]);
|
|
if (!p)
|
|
return (0);
|
|
error = sysctl_out_proc(p, req, 0);
|
|
return (error);
|
|
}
|
|
if (oidp->oid_number == KERN_PROC_ALL && !namelen)
|
|
;
|
|
else if (oidp->oid_number != KERN_PROC_ALL && namelen == 1)
|
|
;
|
|
else
|
|
return (EINVAL);
|
|
|
|
if (!req->oldptr) {
|
|
/* overestimate by 5 procs */
|
|
error = SYSCTL_OUT(req, 0, sizeof (struct kinfo_proc) * 5);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
for (doingzomb=0 ; doingzomb < 2 ; doingzomb++) {
|
|
if (!doingzomb)
|
|
p = allproc.lh_first;
|
|
else
|
|
p = zombproc.lh_first;
|
|
for (; p != 0; p = p->p_list.le_next) {
|
|
/*
|
|
* Skip embryonic processes.
|
|
*/
|
|
if (p->p_stat == SIDL)
|
|
continue;
|
|
/*
|
|
* TODO - make more efficient (see notes below).
|
|
* do by session.
|
|
*/
|
|
switch (oidp->oid_number) {
|
|
|
|
case KERN_PROC_PGRP:
|
|
/* could do this by traversing pgrp */
|
|
if (p->p_pgrp == NULL ||
|
|
p->p_pgrp->pg_id != (pid_t)name[0])
|
|
continue;
|
|
break;
|
|
|
|
case KERN_PROC_TTY:
|
|
if ((p->p_flag & P_CONTROLT) == 0 ||
|
|
p->p_session == NULL ||
|
|
p->p_session->s_ttyp == NULL ||
|
|
p->p_session->s_ttyp->t_dev != (dev_t)name[0])
|
|
continue;
|
|
break;
|
|
|
|
case KERN_PROC_UID:
|
|
if (p->p_ucred == NULL ||
|
|
p->p_ucred->cr_uid != (uid_t)name[0])
|
|
continue;
|
|
break;
|
|
|
|
case KERN_PROC_RUID:
|
|
if (p->p_ucred == NULL ||
|
|
p->p_cred->p_ruid != (uid_t)name[0])
|
|
continue;
|
|
break;
|
|
}
|
|
|
|
error = sysctl_out_proc(p, req, doingzomb);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
|
|
SYSCTL_NODE(_kern, KERN_PROC, proc, CTLFLAG_RD, 0, "Process table");
|
|
|
|
SYSCTL_PROC(_kern_proc, KERN_PROC_ALL, all, CTLFLAG_RD|CTLTYPE_STRUCT,
|
|
0, 0, sysctl_kern_proc, "S,proc", "");
|
|
|
|
SYSCTL_NODE(_kern_proc, KERN_PROC_PGRP, pgrp, CTLFLAG_RD,
|
|
sysctl_kern_proc, "Process table");
|
|
|
|
SYSCTL_NODE(_kern_proc, KERN_PROC_TTY, tty, CTLFLAG_RD,
|
|
sysctl_kern_proc, "Process table");
|
|
|
|
SYSCTL_NODE(_kern_proc, KERN_PROC_UID, uid, CTLFLAG_RD,
|
|
sysctl_kern_proc, "Process table");
|
|
|
|
SYSCTL_NODE(_kern_proc, KERN_PROC_RUID, ruid, CTLFLAG_RD,
|
|
sysctl_kern_proc, "Process table");
|
|
|
|
SYSCTL_NODE(_kern_proc, KERN_PROC_PID, pid, CTLFLAG_RD,
|
|
sysctl_kern_proc, "Process table");
|