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kern_proc.c (1542) kern_proc.c (1549)
1/*
2 * Copyright (c) 1982, 1986, 1989, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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44#include <sys/file.h>
45#include <ufs/ufs/quota.h>
46#include <sys/uio.h>
47#include <sys/malloc.h>
48#include <sys/mbuf.h>
49#include <sys/ioctl.h>
50#include <sys/tty.h>
51
1/*
2 * Copyright (c) 1982, 1986, 1989, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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44#include <sys/file.h>
45#include <ufs/ufs/quota.h>
46#include <sys/uio.h>
47#include <sys/malloc.h>
48#include <sys/mbuf.h>
49#include <sys/ioctl.h>
50#include <sys/tty.h>
51
52void pgdelete __P((struct pgrp *));
53void fixjobc __P((struct proc *, struct pgrp *, int));
54
52/*
53 * Structure associated with user cacheing.
54 */
55struct uidinfo {
56 struct uidinfo *ui_next;
57 struct uidinfo **ui_prev;
58 uid_t ui_uid;
59 long ui_proccnt;
60} **uihashtbl;
61u_long uihash; /* size of hash table - 1 */
62#define UIHASH(uid) ((uid) & uihash)
63
64/*
65 * Allocate a hash table.
66 */
55/*
56 * Structure associated with user cacheing.
57 */
58struct uidinfo {
59 struct uidinfo *ui_next;
60 struct uidinfo **ui_prev;
61 uid_t ui_uid;
62 long ui_proccnt;
63} **uihashtbl;
64u_long uihash; /* size of hash table - 1 */
65#define UIHASH(uid) ((uid) & uihash)
66
67/*
68 * Allocate a hash table.
69 */
70void
67usrinfoinit()
68{
69
70 uihashtbl = hashinit(maxproc / 16, M_PROC, &uihash);
71}
72
73/*
74 * Change the count associated with number of processes

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111 uip->ui_uid = uid;
112 uip->ui_proccnt = diff;
113 return (diff);
114}
115
116/*
117 * Is p an inferior of the current process?
118 */
71usrinfoinit()
72{
73
74 uihashtbl = hashinit(maxproc / 16, M_PROC, &uihash);
75}
76
77/*
78 * Change the count associated with number of processes

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115 uip->ui_uid = uid;
116 uip->ui_proccnt = diff;
117 return (diff);
118}
119
120/*
121 * Is p an inferior of the current process?
122 */
123int
119inferior(p)
120 register struct proc *p;
121{
122
123 for (; p != curproc; p = p->p_pptr)
124 if (p->p_pid == 0)
125 return (0);
126 return (1);

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155 if (pgrp->pg_id == pgid)
156 return (pgrp);
157 return (NULL);
158}
159
160/*
161 * Move p to a new or existing process group (and session)
162 */
124inferior(p)
125 register struct proc *p;
126{
127
128 for (; p != curproc; p = p->p_pptr)
129 if (p->p_pid == 0)
130 return (0);
131 return (1);

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160 if (pgrp->pg_id == pgid)
161 return (pgrp);
162 return (NULL);
163}
164
165/*
166 * Move p to a new or existing process group (and session)
167 */
168int
163enterpgrp(p, pgid, mksess)
164 register struct proc *p;
165 pid_t pgid;
166 int mksess;
167{
168 register struct pgrp *pgrp = pgfind(pgid);
169 register struct proc **pp;
170 int n;

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254 p->p_pgrpnxt = pgrp->pg_mem;
255 pgrp->pg_mem = p;
256 return (0);
257}
258
259/*
260 * remove process from process group
261 */
169enterpgrp(p, pgid, mksess)
170 register struct proc *p;
171 pid_t pgid;
172 int mksess;
173{
174 register struct pgrp *pgrp = pgfind(pgid);
175 register struct proc **pp;
176 int n;

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260 p->p_pgrpnxt = pgrp->pg_mem;
261 pgrp->pg_mem = p;
262 return (0);
263}
264
265/*
266 * remove process from process group
267 */
268int
262leavepgrp(p)
263 register struct proc *p;
264{
265 register struct proc **pp = &p->p_pgrp->pg_mem;
266
267 for (; *pp; pp = &(*pp)->p_pgrpnxt) {
268 if (*pp == p) {
269 *pp = p->p_pgrpnxt;

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278 pgdelete(p->p_pgrp);
279 p->p_pgrp = 0;
280 return (0);
281}
282
283/*
284 * delete a process group
285 */
269leavepgrp(p)
270 register struct proc *p;
271{
272 register struct proc **pp = &p->p_pgrp->pg_mem;
273
274 for (; *pp; pp = &(*pp)->p_pgrpnxt) {
275 if (*pp == p) {
276 *pp = p->p_pgrpnxt;

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285 pgdelete(p->p_pgrp);
286 p->p_pgrp = 0;
287 return (0);
288}
289
290/*
291 * delete a process group
292 */
293void
286pgdelete(pgrp)
287 register struct pgrp *pgrp;
288{
289 register struct pgrp **pgp = &pgrphash[PIDHASH(pgrp->pg_id)];
290
291 if (pgrp->pg_session->s_ttyp != NULL &&
292 pgrp->pg_session->s_ttyp->t_pgrp == pgrp)
293 pgrp->pg_session->s_ttyp->t_pgrp = NULL;

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313 * We count the number of processes in each process group that "qualify"
314 * the group for terminal job control (those with a parent in a different
315 * process group of the same session). If that count reaches zero, the
316 * process group becomes orphaned. Check both the specified process'
317 * process group and that of its children.
318 * entering == 0 => p is leaving specified group.
319 * entering == 1 => p is entering specified group.
320 */
294pgdelete(pgrp)
295 register struct pgrp *pgrp;
296{
297 register struct pgrp **pgp = &pgrphash[PIDHASH(pgrp->pg_id)];
298
299 if (pgrp->pg_session->s_ttyp != NULL &&
300 pgrp->pg_session->s_ttyp->t_pgrp == pgrp)
301 pgrp->pg_session->s_ttyp->t_pgrp = NULL;

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321 * We count the number of processes in each process group that "qualify"
322 * the group for terminal job control (those with a parent in a different
323 * process group of the same session). If that count reaches zero, the
324 * process group becomes orphaned. Check both the specified process'
325 * process group and that of its children.
326 * entering == 0 => p is leaving specified group.
327 * entering == 1 => p is entering specified group.
328 */
329void
321fixjobc(p, pgrp, entering)
322 register struct proc *p;
323 register struct pgrp *pgrp;
324 int entering;
325{
326 register struct pgrp *hispgrp;
327 register struct session *mysession = pgrp->pg_session;
328

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331 register struct proc *p;
332 register struct pgrp *pgrp;
333 int entering;
334{
335 register struct pgrp *hispgrp;
336 register struct session *mysession = pgrp->pg_session;
337

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