FreeBSD/Linux Kernel Cross Reference
sys/kern/kern_acct.c
1 /*-
2 * Copyright (c) 1982, 1986, 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
5 * Copyright (c) 2005 Robert N. M. Watson
6 * All rights reserved.
7 *
8 * All or some portions of this file are derived from material licensed
9 * to the University of California by American Telephone and Telegraph
10 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
11 * the permission of UNIX System Laboratories, Inc.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 4. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 * Copyright (c) 1994 Christopher G. Demetriou
38 *
39 * Redistribution and use in source and binary forms, with or without
40 * modification, are permitted provided that the following conditions
41 * are met:
42 * 1. Redistributions of source code must retain the above copyright
43 * notice, this list of conditions and the following disclaimer.
44 * 2. Redistributions in binary form must reproduce the above copyright
45 * notice, this list of conditions and the following disclaimer in the
46 * documentation and/or other materials provided with the distribution.
47 * 3. All advertising materials mentioning features or use of this software
48 * must display the following acknowledgement:
49 * This product includes software developed by the University of
50 * California, Berkeley and its contributors.
51 * 4. Neither the name of the University nor the names of its contributors
52 * may be used to endorse or promote products derived from this software
53 * without specific prior written permission.
54 *
55 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
58 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
65 * SUCH DAMAGE.
66 *
67 * @(#)kern_acct.c 8.1 (Berkeley) 6/14/93
68 */
69
70 #include <sys/cdefs.h>
71 __FBSDID("$FreeBSD: releng/11.1/sys/kern/kern_acct.c 311957 2017-01-12 01:09:15Z kib $");
72
73 #include <sys/param.h>
74 #include <sys/systm.h>
75 #include <sys/acct.h>
76 #include <sys/fcntl.h>
77 #include <sys/kernel.h>
78 #include <sys/kthread.h>
79 #include <sys/limits.h>
80 #include <sys/lock.h>
81 #include <sys/malloc.h>
82 #include <sys/mount.h>
83 #include <sys/mutex.h>
84 #include <sys/namei.h>
85 #include <sys/priv.h>
86 #include <sys/proc.h>
87 #include <sys/resourcevar.h>
88 #include <sys/sched.h>
89 #include <sys/sx.h>
90 #include <sys/sysctl.h>
91 #include <sys/sysent.h>
92 #include <sys/syslog.h>
93 #include <sys/sysproto.h>
94 #include <sys/tty.h>
95 #include <sys/vnode.h>
96
97 #include <security/mac/mac_framework.h>
98
99 /*
100 * The routines implemented in this file are described in:
101 * Leffler, et al.: The Design and Implementation of the 4.3BSD
102 * UNIX Operating System (Addison Welley, 1989)
103 * on pages 62-63.
104 * On May 2007 the historic 3 bits base 8 exponent, 13 bit fraction
105 * compt_t representation described in the above reference was replaced
106 * with that of IEEE-754 floats.
107 *
108 * Arguably, to simplify accounting operations, this mechanism should
109 * be replaced by one in which an accounting log file (similar to /dev/klog)
110 * is read by a user process, etc. However, that has its own problems.
111 */
112
113 /* Floating point definitions from <float.h>. */
114 #define FLT_MANT_DIG 24 /* p */
115 #define FLT_MAX_EXP 128 /* emax */
116
117 /*
118 * Internal accounting functions.
119 * The former's operation is described in Leffler, et al., and the latter
120 * was provided by UCB with the 4.4BSD-Lite release
121 */
122 static uint32_t encode_timeval(struct timeval);
123 static uint32_t encode_long(long);
124 static void acctwatch(void);
125 static void acct_thread(void *);
126 static int acct_disable(struct thread *, int);
127
128 /*
129 * Accounting vnode pointer, saved vnode pointer, and flags for each.
130 * acct_sx protects against changes to the active vnode and credentials
131 * while accounting records are being committed to disk.
132 */
133 static int acct_configured;
134 static int acct_suspended;
135 static struct vnode *acct_vp;
136 static struct ucred *acct_cred;
137 static struct plimit *acct_limit;
138 static int acct_flags;
139 static struct sx acct_sx;
140
141 SX_SYSINIT(acct, &acct_sx, "acct_sx");
142
143 /*
144 * State of the accounting kthread.
145 */
146 static int acct_state;
147
148 #define ACCT_RUNNING 1 /* Accounting kthread is running. */
149 #define ACCT_EXITREQ 2 /* Accounting kthread should exit. */
150
151 /*
152 * Values associated with enabling and disabling accounting
153 */
154 static int acctsuspend = 2; /* stop accounting when < 2% free space left */
155 SYSCTL_INT(_kern, OID_AUTO, acct_suspend, CTLFLAG_RW,
156 &acctsuspend, 0, "percentage of free disk space below which accounting stops");
157
158 static int acctresume = 4; /* resume when free space risen to > 4% */
159 SYSCTL_INT(_kern, OID_AUTO, acct_resume, CTLFLAG_RW,
160 &acctresume, 0, "percentage of free disk space above which accounting resumes");
161
162 static int acctchkfreq = 15; /* frequency (in seconds) to check space */
163
164 static int
165 sysctl_acct_chkfreq(SYSCTL_HANDLER_ARGS)
166 {
167 int error, value;
168
169 /* Write out the old value. */
170 error = SYSCTL_OUT(req, &acctchkfreq, sizeof(int));
171 if (error || req->newptr == NULL)
172 return (error);
173
174 /* Read in and verify the new value. */
175 error = SYSCTL_IN(req, &value, sizeof(int));
176 if (error)
177 return (error);
178 if (value <= 0)
179 return (EINVAL);
180 acctchkfreq = value;
181 return (0);
182 }
183 SYSCTL_PROC(_kern, OID_AUTO, acct_chkfreq, CTLTYPE_INT|CTLFLAG_RW,
184 &acctchkfreq, 0, sysctl_acct_chkfreq, "I",
185 "frequency for checking the free space");
186
187 SYSCTL_INT(_kern, OID_AUTO, acct_configured, CTLFLAG_RD, &acct_configured, 0,
188 "Accounting configured or not");
189
190 SYSCTL_INT(_kern, OID_AUTO, acct_suspended, CTLFLAG_RD, &acct_suspended, 0,
191 "Accounting suspended or not");
192
193 /*
194 * Accounting system call. Written based on the specification and previous
195 * implementation done by Mark Tinguely.
196 */
197 int
198 sys_acct(struct thread *td, struct acct_args *uap)
199 {
200 struct nameidata nd;
201 int error, flags, i, replacing;
202
203 error = priv_check(td, PRIV_ACCT);
204 if (error)
205 return (error);
206
207 /*
208 * If accounting is to be started to a file, open that file for
209 * appending and make sure it's a 'normal'.
210 */
211 if (uap->path != NULL) {
212 NDINIT(&nd, LOOKUP, NOFOLLOW | AUDITVNODE1,
213 UIO_USERSPACE, uap->path, td);
214 flags = FWRITE | O_APPEND;
215 error = vn_open(&nd, &flags, 0, NULL);
216 if (error)
217 return (error);
218 NDFREE(&nd, NDF_ONLY_PNBUF);
219 #ifdef MAC
220 error = mac_system_check_acct(td->td_ucred, nd.ni_vp);
221 if (error) {
222 VOP_UNLOCK(nd.ni_vp, 0);
223 vn_close(nd.ni_vp, flags, td->td_ucred, td);
224 return (error);
225 }
226 #endif
227 VOP_UNLOCK(nd.ni_vp, 0);
228 if (nd.ni_vp->v_type != VREG) {
229 vn_close(nd.ni_vp, flags, td->td_ucred, td);
230 return (EACCES);
231 }
232 #ifdef MAC
233 } else {
234 error = mac_system_check_acct(td->td_ucred, NULL);
235 if (error)
236 return (error);
237 #endif
238 }
239
240 /*
241 * Disallow concurrent access to the accounting vnode while we swap
242 * it out, in order to prevent access after close.
243 */
244 sx_xlock(&acct_sx);
245
246 /*
247 * Don't log spurious disable/enable messages if we are
248 * switching from one accounting file to another due to log
249 * rotation.
250 */
251 replacing = (acct_vp != NULL && uap->path != NULL);
252
253 /*
254 * If accounting was previously enabled, kill the old space-watcher,
255 * close the file, and (if no new file was specified, leave). Reset
256 * the suspended state regardless of whether accounting remains
257 * enabled.
258 */
259 acct_suspended = 0;
260 if (acct_vp != NULL)
261 error = acct_disable(td, !replacing);
262 if (uap->path == NULL) {
263 if (acct_state & ACCT_RUNNING) {
264 acct_state |= ACCT_EXITREQ;
265 wakeup(&acct_state);
266 }
267 sx_xunlock(&acct_sx);
268 return (error);
269 }
270
271 /*
272 * Create our own plimit object without limits. It will be assigned
273 * to exiting processes.
274 */
275 acct_limit = lim_alloc();
276 for (i = 0; i < RLIM_NLIMITS; i++)
277 acct_limit->pl_rlimit[i].rlim_cur =
278 acct_limit->pl_rlimit[i].rlim_max = RLIM_INFINITY;
279
280 /*
281 * Save the new accounting file vnode, and schedule the new
282 * free space watcher.
283 */
284 acct_vp = nd.ni_vp;
285 acct_cred = crhold(td->td_ucred);
286 acct_flags = flags;
287 if (acct_state & ACCT_RUNNING)
288 acct_state &= ~ACCT_EXITREQ;
289 else {
290 /*
291 * Try to start up an accounting kthread. We may start more
292 * than one, but if so the extras will commit suicide as
293 * soon as they start up.
294 */
295 error = kproc_create(acct_thread, NULL, NULL, 0, 0,
296 "accounting");
297 if (error) {
298 (void) acct_disable(td, 0);
299 sx_xunlock(&acct_sx);
300 log(LOG_NOTICE, "Unable to start accounting thread\n");
301 return (error);
302 }
303 }
304 acct_configured = 1;
305 sx_xunlock(&acct_sx);
306 if (!replacing)
307 log(LOG_NOTICE, "Accounting enabled\n");
308 return (error);
309 }
310
311 /*
312 * Disable currently in-progress accounting by closing the vnode, dropping
313 * our reference to the credential, and clearing the vnode's flags.
314 */
315 static int
316 acct_disable(struct thread *td, int logging)
317 {
318 int error;
319
320 sx_assert(&acct_sx, SX_XLOCKED);
321 error = vn_close(acct_vp, acct_flags, acct_cred, td);
322 crfree(acct_cred);
323 lim_free(acct_limit);
324 acct_configured = 0;
325 acct_vp = NULL;
326 acct_cred = NULL;
327 acct_flags = 0;
328 if (logging)
329 log(LOG_NOTICE, "Accounting disabled\n");
330 return (error);
331 }
332
333 /*
334 * Write out process accounting information, on process exit.
335 * Data to be written out is specified in Leffler, et al.
336 * and are enumerated below. (They're also noted in the system
337 * "acct.h" header file.)
338 */
339 int
340 acct_process(struct thread *td)
341 {
342 struct acctv2 acct;
343 struct timeval ut, st, tmp;
344 struct plimit *oldlim;
345 struct proc *p;
346 struct rusage ru;
347 int t, ret;
348
349 /*
350 * Lockless check of accounting condition before doing the hard
351 * work.
352 */
353 if (acct_vp == NULL || acct_suspended)
354 return (0);
355
356 sx_slock(&acct_sx);
357
358 /*
359 * If accounting isn't enabled, don't bother. Have to check again
360 * once we own the lock in case we raced with disabling of accounting
361 * by another thread.
362 */
363 if (acct_vp == NULL || acct_suspended) {
364 sx_sunlock(&acct_sx);
365 return (0);
366 }
367
368 p = td->td_proc;
369
370 /*
371 * Get process accounting information.
372 */
373
374 sx_slock(&proctree_lock);
375 PROC_LOCK(p);
376
377 /* (1) The terminal from which the process was started */
378 if ((p->p_flag & P_CONTROLT) && p->p_pgrp->pg_session->s_ttyp)
379 acct.ac_tty = tty_udev(p->p_pgrp->pg_session->s_ttyp);
380 else
381 acct.ac_tty = NODEV;
382 sx_sunlock(&proctree_lock);
383
384 /* (2) The name of the command that ran */
385 bcopy(p->p_comm, acct.ac_comm, sizeof acct.ac_comm);
386
387 /* (3) The amount of user and system time that was used */
388 rufetchcalc(p, &ru, &ut, &st);
389 acct.ac_utime = encode_timeval(ut);
390 acct.ac_stime = encode_timeval(st);
391
392 /* (4) The elapsed time the command ran (and its starting time) */
393 getboottime(&tmp);
394 timevaladd(&tmp, &p->p_stats->p_start);
395 acct.ac_btime = tmp.tv_sec;
396 microuptime(&tmp);
397 timevalsub(&tmp, &p->p_stats->p_start);
398 acct.ac_etime = encode_timeval(tmp);
399
400 /* (5) The average amount of memory used */
401 tmp = ut;
402 timevaladd(&tmp, &st);
403 /* Convert tmp (i.e. u + s) into hz units to match ru_i*. */
404 t = tmp.tv_sec * hz + tmp.tv_usec / tick;
405 if (t)
406 acct.ac_mem = encode_long((ru.ru_ixrss + ru.ru_idrss +
407 + ru.ru_isrss) / t);
408 else
409 acct.ac_mem = 0;
410
411 /* (6) The number of disk I/O operations done */
412 acct.ac_io = encode_long(ru.ru_inblock + ru.ru_oublock);
413
414 /* (7) The UID and GID of the process */
415 acct.ac_uid = p->p_ucred->cr_ruid;
416 acct.ac_gid = p->p_ucred->cr_rgid;
417
418 /* (8) The boolean flags that tell how the process terminated, etc. */
419 acct.ac_flagx = p->p_acflag;
420
421 /* Setup ancillary structure fields. */
422 acct.ac_flagx |= ANVER;
423 acct.ac_zero = 0;
424 acct.ac_version = 2;
425 acct.ac_len = acct.ac_len2 = sizeof(acct);
426
427 /*
428 * Eliminate rlimits (file size limit in particular).
429 */
430 oldlim = p->p_limit;
431 p->p_limit = lim_hold(acct_limit);
432 PROC_UNLOCK(p);
433 lim_free(oldlim);
434
435 /*
436 * Write the accounting information to the file.
437 */
438 ret = vn_rdwr(UIO_WRITE, acct_vp, (caddr_t)&acct, sizeof (acct),
439 (off_t)0, UIO_SYSSPACE, IO_APPEND|IO_UNIT, acct_cred, NOCRED,
440 NULL, td);
441 sx_sunlock(&acct_sx);
442 return (ret);
443 }
444
445 /* FLOAT_CONVERSION_START (Regression testing; don't remove this line.) */
446
447 /* Convert timevals and longs into IEEE-754 bit patterns. */
448
449 /* Mantissa mask (MSB is implied, so subtract 1). */
450 #define MANT_MASK ((1 << (FLT_MANT_DIG - 1)) - 1)
451
452 /*
453 * We calculate integer values to a precision of approximately
454 * 28 bits.
455 * This is high-enough precision to fill the 24 float bits
456 * and low-enough to avoid overflowing the 32 int bits.
457 */
458 #define CALC_BITS 28
459
460 /* log_2(1000000). */
461 #define LOG2_1M 20
462
463 /*
464 * Convert the elements of a timeval into a 32-bit word holding
465 * the bits of a IEEE-754 float.
466 * The float value represents the timeval's value in microsecond units.
467 */
468 static uint32_t
469 encode_timeval(struct timeval tv)
470 {
471 int log2_s;
472 int val, exp; /* Unnormalized value and exponent */
473 int norm_exp; /* Normalized exponent */
474 int shift;
475
476 /*
477 * First calculate value and exponent to about CALC_BITS precision.
478 * Note that the following conditionals have been ordered so that
479 * the most common cases appear first.
480 */
481 if (tv.tv_sec == 0) {
482 if (tv.tv_usec == 0)
483 return (0);
484 exp = 0;
485 val = tv.tv_usec;
486 } else {
487 /*
488 * Calculate the value to a precision of approximately
489 * CALC_BITS.
490 */
491 log2_s = fls(tv.tv_sec) - 1;
492 if (log2_s + LOG2_1M < CALC_BITS) {
493 exp = 0;
494 val = 1000000 * tv.tv_sec + tv.tv_usec;
495 } else {
496 exp = log2_s + LOG2_1M - CALC_BITS;
497 val = (unsigned int)(((uint64_t)1000000 * tv.tv_sec +
498 tv.tv_usec) >> exp);
499 }
500 }
501 /* Now normalize and pack the value into an IEEE-754 float. */
502 norm_exp = fls(val) - 1;
503 shift = FLT_MANT_DIG - norm_exp - 1;
504 #ifdef ACCT_DEBUG
505 printf("val=%d exp=%d shift=%d log2(val)=%d\n",
506 val, exp, shift, norm_exp);
507 printf("exp=%x mant=%x\n", FLT_MAX_EXP - 1 + exp + norm_exp,
508 ((shift > 0 ? (val << shift) : (val >> -shift)) & MANT_MASK));
509 #endif
510 return (((FLT_MAX_EXP - 1 + exp + norm_exp) << (FLT_MANT_DIG - 1)) |
511 ((shift > 0 ? val << shift : val >> -shift) & MANT_MASK));
512 }
513
514 /*
515 * Convert a non-negative long value into the bit pattern of
516 * an IEEE-754 float value.
517 */
518 static uint32_t
519 encode_long(long val)
520 {
521 int norm_exp; /* Normalized exponent */
522 int shift;
523
524 if (val == 0)
525 return (0);
526 if (val < 0) {
527 log(LOG_NOTICE,
528 "encode_long: negative value %ld in accounting record\n",
529 val);
530 val = LONG_MAX;
531 }
532 norm_exp = fls(val) - 1;
533 shift = FLT_MANT_DIG - norm_exp - 1;
534 #ifdef ACCT_DEBUG
535 printf("val=%d shift=%d log2(val)=%d\n",
536 val, shift, norm_exp);
537 printf("exp=%x mant=%x\n", FLT_MAX_EXP - 1 + exp + norm_exp,
538 ((shift > 0 ? (val << shift) : (val >> -shift)) & MANT_MASK));
539 #endif
540 return (((FLT_MAX_EXP - 1 + norm_exp) << (FLT_MANT_DIG - 1)) |
541 ((shift > 0 ? val << shift : val >> -shift) & MANT_MASK));
542 }
543
544 /* FLOAT_CONVERSION_END (Regression testing; don't remove this line.) */
545
546 /*
547 * Periodically check the filesystem to see if accounting
548 * should be turned on or off. Beware the case where the vnode
549 * has been vgone()'d out from underneath us, e.g. when the file
550 * system containing the accounting file has been forcibly unmounted.
551 */
552 /* ARGSUSED */
553 static void
554 acctwatch(void)
555 {
556 struct statfs *sp;
557
558 sx_assert(&acct_sx, SX_XLOCKED);
559
560 /*
561 * If accounting was disabled before our kthread was scheduled,
562 * then acct_vp might be NULL. If so, just ask our kthread to
563 * exit and return.
564 */
565 if (acct_vp == NULL) {
566 acct_state |= ACCT_EXITREQ;
567 return;
568 }
569
570 /*
571 * If our vnode is no longer valid, tear it down and signal the
572 * accounting thread to die.
573 */
574 if (acct_vp->v_type == VBAD) {
575 (void) acct_disable(NULL, 1);
576 acct_state |= ACCT_EXITREQ;
577 return;
578 }
579
580 /*
581 * Stopping here is better than continuing, maybe it will be VBAD
582 * next time around.
583 */
584 sp = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK);
585 if (VFS_STATFS(acct_vp->v_mount, sp) < 0) {
586 free(sp, M_STATFS);
587 return;
588 }
589 if (acct_suspended) {
590 if (sp->f_bavail > (int64_t)(acctresume * sp->f_blocks /
591 100)) {
592 acct_suspended = 0;
593 log(LOG_NOTICE, "Accounting resumed\n");
594 }
595 } else {
596 if (sp->f_bavail <= (int64_t)(acctsuspend * sp->f_blocks /
597 100)) {
598 acct_suspended = 1;
599 log(LOG_NOTICE, "Accounting suspended\n");
600 }
601 }
602 free(sp, M_STATFS);
603 }
604
605 /*
606 * The main loop for the dedicated kernel thread that periodically calls
607 * acctwatch().
608 */
609 static void
610 acct_thread(void *dummy)
611 {
612 u_char pri;
613
614 /* This is a low-priority kernel thread. */
615 pri = PRI_MAX_KERN;
616 thread_lock(curthread);
617 sched_prio(curthread, pri);
618 thread_unlock(curthread);
619
620 /* If another accounting kthread is already running, just die. */
621 sx_xlock(&acct_sx);
622 if (acct_state & ACCT_RUNNING) {
623 sx_xunlock(&acct_sx);
624 kproc_exit(0);
625 }
626 acct_state |= ACCT_RUNNING;
627
628 /* Loop until we are asked to exit. */
629 while (!(acct_state & ACCT_EXITREQ)) {
630
631 /* Perform our periodic checks. */
632 acctwatch();
633
634 /*
635 * We check this flag again before sleeping since the
636 * acctwatch() might have shut down accounting and asked us
637 * to exit.
638 */
639 if (!(acct_state & ACCT_EXITREQ)) {
640 sx_sleep(&acct_state, &acct_sx, 0, "-",
641 acctchkfreq * hz);
642 }
643 }
644
645 /*
646 * Acknowledge the exit request and shutdown. We clear both the
647 * exit request and running flags.
648 */
649 acct_state = 0;
650 sx_xunlock(&acct_sx);
651 kproc_exit(0);
652 }
Cache object: f694cc3c60cd1120772e87b84c96361c
|