print.c revision 310120 
1/*-
2 * Copyright (c) 1990, 1993, 1994
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
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#if 0
31#ifndef lint
32static char sccsid[] = "@(#)print.c	8.6 (Berkeley) 4/16/94";
33#endif /* not lint */
34#endif
35
36#include <sys/cdefs.h>
37__FBSDID("$FreeBSD: stable/11/bin/ps/print.c 310120 2016-12-15 16:51:33Z vangyzen $");
38
39#include <sys/param.h>
40#include <sys/time.h>
41#include <sys/resource.h>
42#include <sys/proc.h>
43#include <sys/stat.h>
44
45#include <sys/mac.h>
46#include <sys/user.h>
47#include <sys/sysctl.h>
48#include <sys/vmmeter.h>
49
50#include <err.h>
51#include <grp.h>
52#include <langinfo.h>
53#include <locale.h>
54#include <math.h>
55#include <nlist.h>
56#include <pwd.h>
57#include <stddef.h>
58#include <stdint.h>
59#include <stdio.h>
60#include <stdlib.h>
61#include <string.h>
62#include <unistd.h>
63#include <vis.h>
64#include <libxo/xo.h>
65
66#include "ps.h"
67
68#define	COMMAND_WIDTH	16
69#define	ARGUMENTS_WIDTH	16
70
71#define	ps_pgtok(a)	(((a) * getpagesize()) / 1024)
72
73void
74printheader(void)
75{
76	VAR *v;
77	struct varent *vent;
78
79	STAILQ_FOREACH(vent, &varlist, next_ve)
80		if (*vent->header != '\0')
81			break;
82	if (!vent)
83		return;
84
85	STAILQ_FOREACH(vent, &varlist, next_ve) {
86		v = vent->var;
87		if (v->flag & LJUST) {
88			if (STAILQ_NEXT(vent, next_ve) == NULL)	/* last one */
89				xo_emit("{T:/%s}", vent->header);
90			else
91				xo_emit("{T:/%-*s}", v->width, vent->header);
92		} else
93			xo_emit("{T:/%*s}", v->width, vent->header);
94		if (STAILQ_NEXT(vent, next_ve) != NULL)
95			xo_emit("{P: }");
96	}
97	xo_emit("\n");
98}
99
100char *
101arguments(KINFO *k, VARENT *ve)
102{
103	char *vis_args;
104
105	if ((vis_args = malloc(strlen(k->ki_args) * 4 + 1)) == NULL)
106		xo_errx(1, "malloc failed");
107	strvis(vis_args, k->ki_args, VIS_TAB | VIS_NL | VIS_NOSLASH);
108
109	if (STAILQ_NEXT(ve, next_ve) != NULL && strlen(vis_args) > ARGUMENTS_WIDTH)
110		vis_args[ARGUMENTS_WIDTH] = '\0';
111
112	return (vis_args);
113}
114
115char *
116command(KINFO *k, VARENT *ve)
117{
118	char *vis_args, *vis_env, *str;
119
120	if (cflag) {
121		/* If it is the last field, then don't pad */
122		if (STAILQ_NEXT(ve, next_ve) == NULL) {
123			asprintf(&str, "%s%s%s%s%s",
124			    k->ki_d.prefix ? k->ki_d.prefix : "",
125			    k->ki_p->ki_comm,
126			    (showthreads && k->ki_p->ki_numthreads > 1) ? "/" : "",
127			    (showthreads && k->ki_p->ki_numthreads > 1) ? k->ki_p->ki_tdname : "",
128			    (showthreads && k->ki_p->ki_numthreads > 1) ? k->ki_p->ki_moretdname : "");
129		} else
130			str = strdup(k->ki_p->ki_comm);
131
132		return (str);
133	}
134	if ((vis_args = malloc(strlen(k->ki_args) * 4 + 1)) == NULL)
135		xo_errx(1, "malloc failed");
136	strvis(vis_args, k->ki_args, VIS_TAB | VIS_NL | VIS_NOSLASH);
137
138	if (STAILQ_NEXT(ve, next_ve) == NULL) {
139		/* last field */
140
141		if (k->ki_env) {
142			if ((vis_env = malloc(strlen(k->ki_env) * 4 + 1))
143			    == NULL)
144				xo_errx(1, "malloc failed");
145			strvis(vis_env, k->ki_env,
146			    VIS_TAB | VIS_NL | VIS_NOSLASH);
147		} else
148			vis_env = NULL;
149
150		asprintf(&str, "%s%s%s%s",
151		    k->ki_d.prefix ? k->ki_d.prefix : "",
152		    vis_env ? vis_env : "",
153		    vis_env ? " " : "",
154		    vis_args);
155
156		if (vis_env != NULL)
157			free(vis_env);
158		free(vis_args);
159	} else {
160		/* ki_d.prefix & ki_env aren't shown for interim fields */
161		str = vis_args;
162
163		if (strlen(str) > COMMAND_WIDTH)
164			str[COMMAND_WIDTH] = '\0';
165	}
166
167	return (str);
168}
169
170char *
171ucomm(KINFO *k, VARENT *ve)
172{
173	char *str;
174
175	if (STAILQ_NEXT(ve, next_ve) == NULL) {	/* last field, don't pad */
176		asprintf(&str, "%s%s%s%s%s",
177		    k->ki_d.prefix ? k->ki_d.prefix : "",
178		    k->ki_p->ki_comm,
179		    (showthreads && k->ki_p->ki_numthreads > 1) ? "/" : "",
180		    (showthreads && k->ki_p->ki_numthreads > 1) ? k->ki_p->ki_tdname : "",
181		    (showthreads && k->ki_p->ki_numthreads > 1) ? k->ki_p->ki_moretdname : "");
182	} else {
183		if (showthreads && k->ki_p->ki_numthreads > 1)
184			asprintf(&str, "%s/%s%s", k->ki_p->ki_comm,
185			    k->ki_p->ki_tdname, k->ki_p->ki_moretdname);
186		else
187			str = strdup(k->ki_p->ki_comm);
188	}
189	return (str);
190}
191
192char *
193tdnam(KINFO *k, VARENT *ve __unused)
194{
195	char *str;
196
197	if (showthreads && k->ki_p->ki_numthreads > 1)
198		asprintf(&str, "%s%s", k->ki_p->ki_tdname,
199		    k->ki_p->ki_moretdname);
200	else
201		str = strdup("      ");
202
203	return (str);
204}
205
206char *
207logname(KINFO *k, VARENT *ve __unused)
208{
209
210	if (*k->ki_p->ki_login == '\0')
211		return (NULL);
212	return (strdup(k->ki_p->ki_login));
213}
214
215char *
216state(KINFO *k, VARENT *ve __unused)
217{
218	long flag, tdflags;
219	char *cp, *buf;
220
221	buf = malloc(16);
222	if (buf == NULL)
223		xo_errx(1, "malloc failed");
224
225	flag = k->ki_p->ki_flag;
226	tdflags = k->ki_p->ki_tdflags;	/* XXXKSE */
227	cp = buf;
228
229	switch (k->ki_p->ki_stat) {
230
231	case SSTOP:
232		*cp = 'T';
233		break;
234
235	case SSLEEP:
236		if (tdflags & TDF_SINTR)	/* interruptable (long) */
237			*cp = k->ki_p->ki_slptime >= MAXSLP ? 'I' : 'S';
238		else
239			*cp = 'D';
240		break;
241
242	case SRUN:
243	case SIDL:
244		*cp = 'R';
245		break;
246
247	case SWAIT:
248		*cp = 'W';
249		break;
250
251	case SLOCK:
252		*cp = 'L';
253		break;
254
255	case SZOMB:
256		*cp = 'Z';
257		break;
258
259	default:
260		*cp = '?';
261	}
262	cp++;
263	if (!(flag & P_INMEM))
264		*cp++ = 'W';
265	if (k->ki_p->ki_nice < NZERO)
266		*cp++ = '<';
267	else if (k->ki_p->ki_nice > NZERO)
268		*cp++ = 'N';
269	if (flag & P_TRACED)
270		*cp++ = 'X';
271	if (flag & P_WEXIT && k->ki_p->ki_stat != SZOMB)
272		*cp++ = 'E';
273	if (flag & P_PPWAIT)
274		*cp++ = 'V';
275	if ((flag & P_SYSTEM) || k->ki_p->ki_lock > 0)
276		*cp++ = 'L';
277	if (k->ki_p->ki_kiflag & KI_SLEADER)
278		*cp++ = 's';
279	if ((flag & P_CONTROLT) && k->ki_p->ki_pgid == k->ki_p->ki_tpgid)
280		*cp++ = '+';
281	if (flag & P_JAILED)
282		*cp++ = 'J';
283	*cp = '\0';
284	return (buf);
285}
286
287#define	scalepri(x)	((x) - PZERO)
288
289char *
290pri(KINFO *k, VARENT *ve __unused)
291{
292	char *str;
293
294	asprintf(&str, "%d", scalepri(k->ki_p->ki_pri.pri_level));
295	return (str);
296}
297
298char *
299upr(KINFO *k, VARENT *ve __unused)
300{
301	char *str;
302
303	asprintf(&str, "%d", scalepri(k->ki_p->ki_pri.pri_user));
304	return (str);
305}
306#undef scalepri
307
308char *
309uname(KINFO *k, VARENT *ve __unused)
310{
311
312	return (strdup(user_from_uid(k->ki_p->ki_uid, 0)));
313}
314
315char *
316egroupname(KINFO *k, VARENT *ve __unused)
317{
318
319	return (strdup(group_from_gid(k->ki_p->ki_groups[0], 0)));
320}
321
322char *
323rgroupname(KINFO *k, VARENT *ve __unused)
324{
325
326	return (strdup(group_from_gid(k->ki_p->ki_rgid, 0)));
327}
328
329char *
330runame(KINFO *k, VARENT *ve __unused)
331{
332
333	return (strdup(user_from_uid(k->ki_p->ki_ruid, 0)));
334}
335
336char *
337tdev(KINFO *k, VARENT *ve __unused)
338{
339	dev_t dev;
340	char *str;
341
342	dev = k->ki_p->ki_tdev;
343	if (dev == NODEV)
344		str = strdup("-");
345	else
346		asprintf(&str, "%#jx", (uintmax_t)dev);
347
348	return (str);
349}
350
351char *
352tname(KINFO *k, VARENT *ve __unused)
353{
354	dev_t dev;
355	char *ttname, *str;
356
357	dev = k->ki_p->ki_tdev;
358	if (dev == NODEV || (ttname = devname(dev, S_IFCHR)) == NULL)
359		str = strdup("- ");
360	else {
361		if (strncmp(ttname, "tty", 3) == 0 ||
362		    strncmp(ttname, "cua", 3) == 0)
363			ttname += 3;
364		if (strncmp(ttname, "pts/", 4) == 0)
365			ttname += 4;
366		asprintf(&str, "%s%c", ttname,
367		    k->ki_p->ki_kiflag & KI_CTTY ? ' ' : '-');
368	}
369
370	return (str);
371}
372
373char *
374longtname(KINFO *k, VARENT *ve __unused)
375{
376	dev_t dev;
377	const char *ttname;
378
379	dev = k->ki_p->ki_tdev;
380	if (dev == NODEV || (ttname = devname(dev, S_IFCHR)) == NULL)
381		ttname = "-";
382
383	return (strdup(ttname));
384}
385
386char *
387started(KINFO *k, VARENT *ve __unused)
388{
389	time_t then;
390	struct tm *tp;
391	size_t buflen = 100;
392	char *buf;
393
394	if (!k->ki_valid)
395		return (NULL);
396
397	buf = malloc(buflen);
398	if (buf == NULL)
399		xo_errx(1, "malloc failed");
400
401	then = k->ki_p->ki_start.tv_sec;
402	tp = localtime(&then);
403	if (now - k->ki_p->ki_start.tv_sec < 24 * 3600) {
404		(void)strftime(buf, buflen, "%H:%M  ", tp);
405	} else if (now - k->ki_p->ki_start.tv_sec < 7 * 86400) {
406		(void)strftime(buf, buflen, "%a%H  ", tp);
407	} else
408		(void)strftime(buf, buflen, "%e%b%y", tp);
409	return (buf);
410}
411
412char *
413lstarted(KINFO *k, VARENT *ve __unused)
414{
415	time_t then;
416	char *buf;
417	size_t buflen = 100;
418
419	if (!k->ki_valid)
420		return (NULL);
421
422	buf = malloc(buflen);
423	if (buf == NULL)
424		xo_errx(1, "malloc failed");
425
426	then = k->ki_p->ki_start.tv_sec;
427	(void)strftime(buf, buflen, "%c", localtime(&then));
428	return (buf);
429}
430
431char *
432lockname(KINFO *k, VARENT *ve __unused)
433{
434	char *str;
435
436	if (k->ki_p->ki_kiflag & KI_LOCKBLOCK) {
437		if (k->ki_p->ki_lockname[0] != 0)
438			str = strdup(k->ki_p->ki_lockname);
439		else
440			str = strdup("???");
441	} else
442		str = NULL;
443
444	return (str);
445}
446
447char *
448wchan(KINFO *k, VARENT *ve __unused)
449{
450	char *str;
451
452	if (k->ki_p->ki_wchan) {
453		if (k->ki_p->ki_wmesg[0] != 0)
454			str = strdup(k->ki_p->ki_wmesg);
455		else
456			asprintf(&str, "%lx", (long)k->ki_p->ki_wchan);
457	} else
458		str = NULL;
459
460	return (str);
461}
462
463char *
464nwchan(KINFO *k, VARENT *ve __unused)
465{
466	char *str;
467
468	if (k->ki_p->ki_wchan)
469		asprintf(&str, "%0lx", (long)k->ki_p->ki_wchan);
470	else
471		str = NULL;
472
473	return (str);
474}
475
476char *
477mwchan(KINFO *k, VARENT *ve __unused)
478{
479	char *str;
480
481	if (k->ki_p->ki_wchan) {
482		if (k->ki_p->ki_wmesg[0] != 0)
483			str = strdup(k->ki_p->ki_wmesg);
484		else
485                        asprintf(&str, "%lx", (long)k->ki_p->ki_wchan);
486	} else if (k->ki_p->ki_kiflag & KI_LOCKBLOCK) {
487		if (k->ki_p->ki_lockname[0]) {
488			str = strdup(k->ki_p->ki_lockname);
489		} else
490			str = strdup("???");
491	} else
492		str = NULL;
493
494	return (str);
495}
496
497char *
498vsize(KINFO *k, VARENT *ve __unused)
499{
500	char *str;
501
502	asprintf(&str, "%lu", (u_long)(k->ki_p->ki_size / 1024));
503	return (str);
504}
505
506static char *
507printtime(KINFO *k, VARENT *ve __unused, long secs, long psecs)
508/* psecs is "parts" of a second. first micro, then centi */
509{
510	static char decimal_point;
511	char *str;
512
513	if (decimal_point == '\0')
514		decimal_point = localeconv()->decimal_point[0];
515	if (!k->ki_valid) {
516		secs = 0;
517		psecs = 0;
518	} else {
519		/* round and scale to 100's */
520		psecs = (psecs + 5000) / 10000;
521		secs += psecs / 100;
522		psecs = psecs % 100;
523	}
524	asprintf(&str, "%ld:%02ld%c%02ld",
525	    secs / 60, secs % 60, decimal_point, psecs);
526	return (str);
527}
528
529char *
530cputime(KINFO *k, VARENT *ve)
531{
532	long secs, psecs;
533
534	/*
535	 * This counts time spent handling interrupts.  We could
536	 * fix this, but it is not 100% trivial (and interrupt
537	 * time fractions only work on the sparc anyway).	XXX
538	 */
539	secs = k->ki_p->ki_runtime / 1000000;
540	psecs = k->ki_p->ki_runtime % 1000000;
541	if (sumrusage) {
542		secs += k->ki_p->ki_childtime.tv_sec;
543		psecs += k->ki_p->ki_childtime.tv_usec;
544	}
545	return (printtime(k, ve, secs, psecs));
546}
547
548char *
549systime(KINFO *k, VARENT *ve)
550{
551	long secs, psecs;
552
553	secs = k->ki_p->ki_rusage.ru_stime.tv_sec;
554	psecs = k->ki_p->ki_rusage.ru_stime.tv_usec;
555	if (sumrusage) {
556		secs += k->ki_p->ki_childstime.tv_sec;
557		psecs += k->ki_p->ki_childstime.tv_usec;
558	}
559	return (printtime(k, ve, secs, psecs));
560}
561
562char *
563usertime(KINFO *k, VARENT *ve)
564{
565	long secs, psecs;
566
567	secs = k->ki_p->ki_rusage.ru_utime.tv_sec;
568	psecs = k->ki_p->ki_rusage.ru_utime.tv_usec;
569	if (sumrusage) {
570		secs += k->ki_p->ki_childutime.tv_sec;
571		psecs += k->ki_p->ki_childutime.tv_usec;
572	}
573	return (printtime(k, ve, secs, psecs));
574}
575
576char *
577elapsed(KINFO *k, VARENT *ve __unused)
578{
579	time_t val;
580	int days, hours, mins, secs;
581	char *str;
582
583	if (!k->ki_valid)
584		return (NULL);
585	val = now - k->ki_p->ki_start.tv_sec;
586	days = val / (24 * 60 * 60);
587	val %= 24 * 60 * 60;
588	hours = val / (60 * 60);
589	val %= 60 * 60;
590	mins = val / 60;
591	secs = val % 60;
592	if (days != 0)
593		asprintf(&str, "%3d-%02d:%02d:%02d", days, hours, mins, secs);
594	else if (hours != 0)
595		asprintf(&str, "%02d:%02d:%02d", hours, mins, secs);
596	else
597		asprintf(&str, "%02d:%02d", mins, secs);
598
599	return (str);
600}
601
602char *
603elapseds(KINFO *k, VARENT *ve __unused)
604{
605	time_t val;
606	char *str;
607
608	if (!k->ki_valid)
609		return (NULL);
610	val = now - k->ki_p->ki_start.tv_sec;
611	asprintf(&str, "%jd", (intmax_t)val);
612	return (str);
613}
614
615double
616getpcpu(const KINFO *k)
617{
618	static int failure;
619
620	if (!nlistread)
621		failure = donlist();
622	if (failure)
623		return (0.0);
624
625#define	fxtofl(fixpt)	((double)(fixpt) / fscale)
626
627	/* XXX - I don't like this */
628	if (k->ki_p->ki_swtime == 0 || (k->ki_p->ki_flag & P_INMEM) == 0)
629		return (0.0);
630	if (rawcpu)
631		return (100.0 * fxtofl(k->ki_p->ki_pctcpu));
632	return (100.0 * fxtofl(k->ki_p->ki_pctcpu) /
633		(1.0 - exp(k->ki_p->ki_swtime * log(fxtofl(ccpu)))));
634}
635
636char *
637pcpu(KINFO *k, VARENT *ve __unused)
638{
639	char *str;
640
641	asprintf(&str, "%.1f", getpcpu(k));
642	return (str);
643}
644
645static double
646getpmem(KINFO *k)
647{
648	static int failure;
649	double fracmem;
650
651	if (!nlistread)
652		failure = donlist();
653	if (failure)
654		return (0.0);
655
656	if ((k->ki_p->ki_flag & P_INMEM) == 0)
657		return (0.0);
658	/* XXX want pmap ptpages, segtab, etc. (per architecture) */
659	/* XXX don't have info about shared */
660	fracmem = ((float)k->ki_p->ki_rssize) / mempages;
661	return (100.0 * fracmem);
662}
663
664char *
665pmem(KINFO *k, VARENT *ve __unused)
666{
667	char *str;
668
669	asprintf(&str, "%.1f", getpmem(k));
670	return (str);
671}
672
673char *
674pagein(KINFO *k, VARENT *ve __unused)
675{
676	char *str;
677
678	asprintf(&str, "%ld", k->ki_valid ? k->ki_p->ki_rusage.ru_majflt : 0);
679	return (str);
680}
681
682/* ARGSUSED */
683char *
684maxrss(KINFO *k __unused, VARENT *ve __unused)
685{
686
687	/* XXX not yet */
688	return (NULL);
689}
690
691char *
692priorityr(KINFO *k, VARENT *ve __unused)
693{
694	struct priority *lpri;
695	char *str;
696	unsigned class, level;
697
698	lpri = &k->ki_p->ki_pri;
699	class = lpri->pri_class;
700	level = lpri->pri_level;
701	switch (class) {
702	case PRI_ITHD:
703		asprintf(&str, "intr:%u", level);
704		break;
705	case PRI_REALTIME:
706		asprintf(&str, "real:%u", level);
707		break;
708	case PRI_TIMESHARE:
709		asprintf(&str, "normal");
710		break;
711	case PRI_IDLE:
712		asprintf(&str, "idle:%u", level);
713		break;
714	default:
715		asprintf(&str, "%u:%u", class, level);
716		break;
717	}
718	return (str);
719}
720
721/*
722 * Generic output routines.  Print fields from various prototype
723 * structures.
724 */
725static char *
726printval(void *bp, VAR *v)
727{
728	static char ofmt[32] = "%";
729	const char *fcp;
730	char *cp, *str;
731
732	cp = ofmt + 1;
733	fcp = v->fmt;
734	while ((*cp++ = *fcp++));
735
736#define	CHKINF127(n)	(((n) > 127) && (v->flag & INF127) ? 127 : (n))
737
738	switch (v->type) {
739	case CHAR:
740		(void)asprintf(&str, ofmt, *(char *)bp);
741		break;
742	case UCHAR:
743		(void)asprintf(&str, ofmt, *(u_char *)bp);
744		break;
745	case SHORT:
746		(void)asprintf(&str, ofmt, *(short *)bp);
747		break;
748	case USHORT:
749		(void)asprintf(&str, ofmt, *(u_short *)bp);
750		break;
751	case INT:
752		(void)asprintf(&str, ofmt, *(int *)bp);
753		break;
754	case UINT:
755		(void)asprintf(&str, ofmt, CHKINF127(*(u_int *)bp));
756		break;
757	case LONG:
758		(void)asprintf(&str, ofmt, *(long *)bp);
759		break;
760	case ULONG:
761		(void)asprintf(&str, ofmt, *(u_long *)bp);
762		break;
763	case KPTR:
764		(void)asprintf(&str, ofmt, *(u_long *)bp);
765		break;
766	case PGTOK:
767		(void)asprintf(&str, ofmt, ps_pgtok(*(u_long *)bp));
768		break;
769	default:
770		xo_errx(1, "unknown type %d", v->type);
771	}
772
773	return (str);
774}
775
776char *
777kvar(KINFO *k, VARENT *ve)
778{
779	VAR *v;
780
781	v = ve->var;
782	return (printval((char *)((char *)k->ki_p + v->off), v));
783}
784
785char *
786rvar(KINFO *k, VARENT *ve)
787{
788	VAR *v;
789
790	v = ve->var;
791	if (!k->ki_valid)
792		return (NULL);
793	return (printval((char *)((char *)(&k->ki_p->ki_rusage) + v->off), v));
794}
795
796char *
797emulname(KINFO *k, VARENT *ve __unused)
798{
799
800	return (strdup(k->ki_p->ki_emul));
801}
802
803char *
804label(KINFO *k, VARENT *ve __unused)
805{
806	char *string;
807	mac_t proclabel;
808	int error;
809
810	string = NULL;
811	if (mac_prepare_process_label(&proclabel) == -1) {
812		xo_warn("mac_prepare_process_label");
813		goto out;
814	}
815	error = mac_get_pid(k->ki_p->ki_pid, proclabel);
816	if (error == 0) {
817		if (mac_to_text(proclabel, &string) == -1)
818			string = NULL;
819	}
820	mac_free(proclabel);
821out:
822	return (string);
823}
824
825char *
826loginclass(KINFO *k, VARENT *ve __unused)
827{
828
829	/*
830	 * Don't display login class for system processes;
831	 * login classes are used for resource limits,
832	 * and limits don't apply to system processes.
833	 */
834	if (k->ki_p->ki_flag & P_SYSTEM) {
835		return (strdup("-"));
836	}
837	return (strdup(k->ki_p->ki_loginclass));
838}
839