print.c revision 310121 
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/10/bin/ps/print.c 310121 2016-12-15 16:52:17Z 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
65#include "ps.h"
66
67#define	COMMAND_WIDTH	16
68#define	ARGUMENTS_WIDTH	16
69
70#define	ps_pgtok(a)	(((a) * getpagesize()) / 1024)
71
72void
73printheader(void)
74{
75	VAR *v;
76	struct varent *vent;
77
78	STAILQ_FOREACH(vent, &varlist, next_ve)
79		if (*vent->header != '\0')
80			break;
81	if (!vent)
82		return;
83
84	STAILQ_FOREACH(vent, &varlist, next_ve) {
85		v = vent->var;
86		if (v->flag & LJUST) {
87			if (STAILQ_NEXT(vent, next_ve) == NULL)	/* last one */
88				(void)printf("%s", vent->header);
89			else
90				(void)printf("%-*s", v->width, vent->header);
91		} else
92			(void)printf("%*s", v->width, vent->header);
93		if (STAILQ_NEXT(vent, next_ve) != NULL)
94			(void)putchar(' ');
95	}
96	(void)putchar('\n');
97}
98
99char *
100arguments(KINFO *k, VARENT *ve)
101{
102	char *vis_args;
103
104	if ((vis_args = malloc(strlen(k->ki_args) * 4 + 1)) == NULL)
105		errx(1, "malloc failed");
106	strvis(vis_args, k->ki_args, VIS_TAB | VIS_NL | VIS_NOSLASH);
107
108	if (STAILQ_NEXT(ve, next_ve) != NULL && strlen(vis_args) > ARGUMENTS_WIDTH)
109		vis_args[ARGUMENTS_WIDTH] = '\0';
110
111	return (vis_args);
112}
113
114char *
115command(KINFO *k, VARENT *ve)
116{
117	char *vis_args, *vis_env, *str;
118
119	if (cflag) {
120		/* If it is the last field, then don't pad */
121		if (STAILQ_NEXT(ve, next_ve) == NULL) {
122			asprintf(&str, "%s%s%s%s%s",
123			    k->ki_d.prefix ? k->ki_d.prefix : "",
124			    k->ki_p->ki_comm,
125			    (showthreads && k->ki_p->ki_numthreads > 1) ? "/" : "",
126			    (showthreads && k->ki_p->ki_numthreads > 1) ? k->ki_p->ki_tdname : "",
127			    (showthreads && k->ki_p->ki_numthreads > 1) ? k->ki_p->ki_moretdname : "");
128		} else
129			str = strdup(k->ki_p->ki_comm);
130
131		return (str);
132	}
133	if ((vis_args = malloc(strlen(k->ki_args) * 4 + 1)) == NULL)
134		errx(1, "malloc failed");
135	strvis(vis_args, k->ki_args, VIS_TAB | VIS_NL | VIS_NOSLASH);
136
137	if (STAILQ_NEXT(ve, next_ve) == NULL) {
138		/* last field */
139
140		if (k->ki_env) {
141			if ((vis_env = malloc(strlen(k->ki_env) * 4 + 1))
142			    == NULL)
143				errx(1, "malloc failed");
144			strvis(vis_env, k->ki_env,
145			    VIS_TAB | VIS_NL | VIS_NOSLASH);
146		} else
147			vis_env = NULL;
148
149		asprintf(&str, "%s%s%s%s",
150		    k->ki_d.prefix ? k->ki_d.prefix : "",
151		    vis_env ? vis_env : "",
152		    vis_env ? " " : "",
153		    vis_args);
154
155		if (vis_env != NULL)
156			free(vis_env);
157		free(vis_args);
158	} else {
159		/* ki_d.prefix & ki_env aren't shown for interim fields */
160		str = vis_args;
161
162		if (strlen(str) > COMMAND_WIDTH)
163			str[COMMAND_WIDTH] = '\0';
164	}
165
166	return (str);
167}
168
169char *
170ucomm(KINFO *k, VARENT *ve)
171{
172	char *str;
173
174	if (STAILQ_NEXT(ve, next_ve) == NULL) {	/* last field, don't pad */
175		asprintf(&str, "%s%s%s%s%s",
176		    k->ki_d.prefix ? k->ki_d.prefix : "",
177		    k->ki_p->ki_comm,
178		    (showthreads && k->ki_p->ki_numthreads > 1) ? "/" : "",
179		    (showthreads && k->ki_p->ki_numthreads > 1) ? k->ki_p->ki_tdname : "",
180		    (showthreads && k->ki_p->ki_numthreads > 1) ? k->ki_p->ki_moretdname : "");
181	} else {
182		if (showthreads && k->ki_p->ki_numthreads > 1)
183			asprintf(&str, "%s/%s%s", k->ki_p->ki_comm,
184			    k->ki_p->ki_tdname, k->ki_p->ki_moretdname);
185		else
186			str = strdup(k->ki_p->ki_comm);
187	}
188	return (str);
189}
190
191char *
192tdnam(KINFO *k, VARENT *ve __unused)
193{
194	char *str;
195
196	if (showthreads && k->ki_p->ki_numthreads > 1)
197		asprintf(&str, "%s%s", k->ki_p->ki_tdname,
198		    k->ki_p->ki_moretdname);
199	else
200		str = strdup("      ");
201
202	return (str);
203}
204
205char *
206logname(KINFO *k, VARENT *ve __unused)
207{
208
209	if (*k->ki_p->ki_login == '\0')
210		return (NULL);
211	return (strdup(k->ki_p->ki_login));
212}
213
214char *
215state(KINFO *k, VARENT *ve __unused)
216{
217	int flag, tdflags;
218	char *cp, *buf;
219
220	buf = malloc(16);
221	if (buf == NULL)
222		errx(1, "malloc failed");
223
224	flag = k->ki_p->ki_flag;
225	tdflags = k->ki_p->ki_tdflags;	/* XXXKSE */
226	cp = buf;
227
228	switch (k->ki_p->ki_stat) {
229
230	case SSTOP:
231		*cp = 'T';
232		break;
233
234	case SSLEEP:
235		if (tdflags & TDF_SINTR)	/* interruptable (long) */
236			*cp = k->ki_p->ki_slptime >= MAXSLP ? 'I' : 'S';
237		else
238			*cp = 'D';
239		break;
240
241	case SRUN:
242	case SIDL:
243		*cp = 'R';
244		break;
245
246	case SWAIT:
247		*cp = 'W';
248		break;
249
250	case SLOCK:
251		*cp = 'L';
252		break;
253
254	case SZOMB:
255		*cp = 'Z';
256		break;
257
258	default:
259		*cp = '?';
260	}
261	cp++;
262	if (!(flag & P_INMEM))
263		*cp++ = 'W';
264	if (k->ki_p->ki_nice < NZERO)
265		*cp++ = '<';
266	else if (k->ki_p->ki_nice > NZERO)
267		*cp++ = 'N';
268	if (flag & P_TRACED)
269		*cp++ = 'X';
270	if (flag & P_WEXIT && k->ki_p->ki_stat != SZOMB)
271		*cp++ = 'E';
272	if (flag & P_PPWAIT)
273		*cp++ = 'V';
274	if ((flag & P_SYSTEM) || k->ki_p->ki_lock > 0)
275		*cp++ = 'L';
276	if (k->ki_p->ki_kiflag & KI_SLEADER)
277		*cp++ = 's';
278	if ((flag & P_CONTROLT) && k->ki_p->ki_pgid == k->ki_p->ki_tpgid)
279		*cp++ = '+';
280	if (flag & P_JAILED)
281		*cp++ = 'J';
282	*cp = '\0';
283	return (buf);
284}
285
286#define	scalepri(x)	((x) - PZERO)
287
288char *
289pri(KINFO *k, VARENT *ve __unused)
290{
291	char *str;
292
293	asprintf(&str, "%d", scalepri(k->ki_p->ki_pri.pri_level));
294	return (str);
295}
296
297char *
298upr(KINFO *k, VARENT *ve __unused)
299{
300	char *str;
301
302	asprintf(&str, "%d", scalepri(k->ki_p->ki_pri.pri_user));
303	return (str);
304}
305#undef scalepri
306
307char *
308uname(KINFO *k, VARENT *ve __unused)
309{
310
311	return (strdup(user_from_uid(k->ki_p->ki_uid, 0)));
312}
313
314char *
315egroupname(KINFO *k, VARENT *ve __unused)
316{
317
318	return (strdup(group_from_gid(k->ki_p->ki_groups[0], 0)));
319}
320
321char *
322rgroupname(KINFO *k, VARENT *ve __unused)
323{
324
325	return (strdup(group_from_gid(k->ki_p->ki_rgid, 0)));
326}
327
328char *
329runame(KINFO *k, VARENT *ve __unused)
330{
331
332	return (strdup(user_from_uid(k->ki_p->ki_ruid, 0)));
333}
334
335char *
336tdev(KINFO *k, VARENT *ve __unused)
337{
338	dev_t dev;
339	char *str;
340
341	dev = k->ki_p->ki_tdev;
342	if (dev == NODEV)
343		str = strdup("-");
344	else
345		asprintf(&str, "%#jx", (uintmax_t)dev);
346
347	return (str);
348}
349
350char *
351tname(KINFO *k, VARENT *ve __unused)
352{
353	dev_t dev;
354	char *ttname, *str;
355
356	dev = k->ki_p->ki_tdev;
357	if (dev == NODEV || (ttname = devname(dev, S_IFCHR)) == NULL)
358		str = strdup("- ");
359	else {
360		if (strncmp(ttname, "tty", 3) == 0 ||
361		    strncmp(ttname, "cua", 3) == 0)
362			ttname += 3;
363		if (strncmp(ttname, "pts/", 4) == 0)
364			ttname += 4;
365		asprintf(&str, "%s%c", ttname,
366		    k->ki_p->ki_kiflag & KI_CTTY ? ' ' : '-');
367	}
368
369	return (str);
370}
371
372char *
373longtname(KINFO *k, VARENT *ve __unused)
374{
375	dev_t dev;
376	const char *ttname;
377
378	dev = k->ki_p->ki_tdev;
379	if (dev == NODEV || (ttname = devname(dev, S_IFCHR)) == NULL)
380		ttname = "-";
381
382	return (strdup(ttname));
383}
384
385char *
386started(KINFO *k, VARENT *ve __unused)
387{
388	time_t then;
389	struct tm *tp;
390	static int use_ampm = -1;
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		errx(1, "malloc failed");
400
401	if (use_ampm < 0)
402		use_ampm = (*nl_langinfo(T_FMT_AMPM) != '\0');
403	then = k->ki_p->ki_start.tv_sec;
404	tp = localtime(&then);
405	if (now - k->ki_p->ki_start.tv_sec < 24 * 3600) {
406		(void)strftime(buf, buflen,
407		    use_ampm ? "%l:%M%p" : "%k:%M  ", tp);
408	} else if (now - k->ki_p->ki_start.tv_sec < 7 * 86400) {
409		(void)strftime(buf, buflen,
410		    use_ampm ? "%a%I%p" : "%a%H  ", tp);
411	} else
412		(void)strftime(buf, buflen, "%e%b%y", tp);
413	return (buf);
414}
415
416char *
417lstarted(KINFO *k, VARENT *ve __unused)
418{
419	time_t then;
420	char *buf;
421	size_t buflen = 100;
422
423	if (!k->ki_valid)
424		return (NULL);
425
426	buf = malloc(buflen);
427	if (buf == NULL)
428		errx(1, "malloc failed");
429
430	then = k->ki_p->ki_start.tv_sec;
431	(void)strftime(buf, buflen, "%c", localtime(&then));
432	return (buf);
433}
434
435char *
436lockname(KINFO *k, VARENT *ve __unused)
437{
438	char *str;
439
440	if (k->ki_p->ki_kiflag & KI_LOCKBLOCK) {
441		if (k->ki_p->ki_lockname[0] != 0)
442			str = strdup(k->ki_p->ki_lockname);
443		else
444			str = strdup("???");
445	} else
446		str = NULL;
447
448	return (str);
449}
450
451char *
452wchan(KINFO *k, VARENT *ve __unused)
453{
454	char *str;
455
456	if (k->ki_p->ki_wchan) {
457		if (k->ki_p->ki_wmesg[0] != 0)
458			str = strdup(k->ki_p->ki_wmesg);
459		else
460			asprintf(&str, "%lx", (long)k->ki_p->ki_wchan);
461	} else
462		str = NULL;
463
464	return (str);
465}
466
467char *
468nwchan(KINFO *k, VARENT *ve __unused)
469{
470	char *str;
471
472	if (k->ki_p->ki_wchan)
473		asprintf(&str, "%0lx", (long)k->ki_p->ki_wchan);
474	else
475		str = NULL;
476
477	return (str);
478}
479
480char *
481mwchan(KINFO *k, VARENT *ve __unused)
482{
483	char *str;
484
485	if (k->ki_p->ki_wchan) {
486		if (k->ki_p->ki_wmesg[0] != 0)
487			str = strdup(k->ki_p->ki_wmesg);
488		else
489                        asprintf(&str, "%lx", (long)k->ki_p->ki_wchan);
490	} else if (k->ki_p->ki_kiflag & KI_LOCKBLOCK) {
491		if (k->ki_p->ki_lockname[0]) {
492			str = strdup(k->ki_p->ki_lockname);
493		} else
494			str = strdup("???");
495	} else
496		str = NULL;
497
498	return (str);
499}
500
501char *
502vsize(KINFO *k, VARENT *ve __unused)
503{
504	char *str;
505
506	asprintf(&str, "%lu", (u_long)(k->ki_p->ki_size / 1024));
507	return (str);
508}
509
510static char *
511printtime(KINFO *k, VARENT *ve __unused, long secs, long psecs)
512/* psecs is "parts" of a second. first micro, then centi */
513{
514	static char decimal_point;
515	char *str;
516
517	if (decimal_point == '\0')
518		decimal_point = localeconv()->decimal_point[0];
519	if (!k->ki_valid) {
520		secs = 0;
521		psecs = 0;
522	} else {
523		/* round and scale to 100's */
524		psecs = (psecs + 5000) / 10000;
525		secs += psecs / 100;
526		psecs = psecs % 100;
527	}
528	asprintf(&str, "%ld:%02ld%c%02ld",
529	    secs / 60, secs % 60, decimal_point, psecs);
530	return (str);
531}
532
533char *
534cputime(KINFO *k, VARENT *ve)
535{
536	long secs, psecs;
537
538	/*
539	 * This counts time spent handling interrupts.  We could
540	 * fix this, but it is not 100% trivial (and interrupt
541	 * time fractions only work on the sparc anyway).	XXX
542	 */
543	secs = k->ki_p->ki_runtime / 1000000;
544	psecs = k->ki_p->ki_runtime % 1000000;
545	if (sumrusage) {
546		secs += k->ki_p->ki_childtime.tv_sec;
547		psecs += k->ki_p->ki_childtime.tv_usec;
548	}
549	return (printtime(k, ve, secs, psecs));
550}
551
552char *
553systime(KINFO *k, VARENT *ve)
554{
555	long secs, psecs;
556
557	secs = k->ki_p->ki_rusage.ru_stime.tv_sec;
558	psecs = k->ki_p->ki_rusage.ru_stime.tv_usec;
559	if (sumrusage) {
560		secs += k->ki_p->ki_childstime.tv_sec;
561		psecs += k->ki_p->ki_childstime.tv_usec;
562	}
563	return (printtime(k, ve, secs, psecs));
564}
565
566char *
567usertime(KINFO *k, VARENT *ve)
568{
569	long secs, psecs;
570
571	secs = k->ki_p->ki_rusage.ru_utime.tv_sec;
572	psecs = k->ki_p->ki_rusage.ru_utime.tv_usec;
573	if (sumrusage) {
574		secs += k->ki_p->ki_childutime.tv_sec;
575		psecs += k->ki_p->ki_childutime.tv_usec;
576	}
577	return (printtime(k, ve, secs, psecs));
578}
579
580char *
581elapsed(KINFO *k, VARENT *ve __unused)
582{
583	time_t val;
584	int days, hours, mins, secs;
585	char *str;
586
587	if (!k->ki_valid)
588		return (NULL);
589	val = now - k->ki_p->ki_start.tv_sec;
590	days = val / (24 * 60 * 60);
591	val %= 24 * 60 * 60;
592	hours = val / (60 * 60);
593	val %= 60 * 60;
594	mins = val / 60;
595	secs = val % 60;
596	if (days != 0)
597		asprintf(&str, "%3d-%02d:%02d:%02d", days, hours, mins, secs);
598	else if (hours != 0)
599		asprintf(&str, "%02d:%02d:%02d", hours, mins, secs);
600	else
601		asprintf(&str, "%02d:%02d", mins, secs);
602
603	return (str);
604}
605
606char *
607elapseds(KINFO *k, VARENT *ve __unused)
608{
609	time_t val;
610	char *str;
611
612	if (!k->ki_valid)
613		return (NULL);
614	val = now - k->ki_p->ki_start.tv_sec;
615	asprintf(&str, "%jd", (intmax_t)val);
616	return (str);
617}
618
619double
620getpcpu(const KINFO *k)
621{
622	static int failure;
623
624	if (!nlistread)
625		failure = donlist();
626	if (failure)
627		return (0.0);
628
629#define	fxtofl(fixpt)	((double)(fixpt) / fscale)
630
631	/* XXX - I don't like this */
632	if (k->ki_p->ki_swtime == 0 || (k->ki_p->ki_flag & P_INMEM) == 0)
633		return (0.0);
634	if (rawcpu)
635		return (100.0 * fxtofl(k->ki_p->ki_pctcpu));
636	return (100.0 * fxtofl(k->ki_p->ki_pctcpu) /
637		(1.0 - exp(k->ki_p->ki_swtime * log(fxtofl(ccpu)))));
638}
639
640char *
641pcpu(KINFO *k, VARENT *ve __unused)
642{
643	char *str;
644
645	asprintf(&str, "%.1f", getpcpu(k));
646	return (str);
647}
648
649static double
650getpmem(KINFO *k)
651{
652	static int failure;
653	double fracmem;
654
655	if (!nlistread)
656		failure = donlist();
657	if (failure)
658		return (0.0);
659
660	if ((k->ki_p->ki_flag & P_INMEM) == 0)
661		return (0.0);
662	/* XXX want pmap ptpages, segtab, etc. (per architecture) */
663	/* XXX don't have info about shared */
664	fracmem = ((float)k->ki_p->ki_rssize) / mempages;
665	return (100.0 * fracmem);
666}
667
668char *
669pmem(KINFO *k, VARENT *ve __unused)
670{
671	char *str;
672
673	asprintf(&str, "%.1f", getpmem(k));
674	return (str);
675}
676
677char *
678pagein(KINFO *k, VARENT *ve __unused)
679{
680	char *str;
681
682	asprintf(&str, "%ld", k->ki_valid ? k->ki_p->ki_rusage.ru_majflt : 0);
683	return (str);
684}
685
686/* ARGSUSED */
687char *
688maxrss(KINFO *k __unused, VARENT *ve __unused)
689{
690
691	/* XXX not yet */
692	return (NULL);
693}
694
695char *
696priorityr(KINFO *k, VARENT *ve __unused)
697{
698	struct priority *lpri;
699	char *str;
700	unsigned class, level;
701
702	lpri = &k->ki_p->ki_pri;
703	class = lpri->pri_class;
704	level = lpri->pri_level;
705	switch (class) {
706	case PRI_ITHD:
707		asprintf(&str, "intr:%u", level);
708		break;
709	case PRI_REALTIME:
710		asprintf(&str, "real:%u", level);
711		break;
712	case PRI_TIMESHARE:
713		asprintf(&str, "normal");
714		break;
715	case PRI_IDLE:
716		asprintf(&str, "idle:%u", level);
717		break;
718	default:
719		asprintf(&str, "%u:%u", class, level);
720		break;
721	}
722	return (str);
723}
724
725/*
726 * Generic output routines.  Print fields from various prototype
727 * structures.
728 */
729static char *
730printval(void *bp, VAR *v)
731{
732	static char ofmt[32] = "%";
733	const char *fcp;
734	char *cp, *str;
735
736	cp = ofmt + 1;
737	fcp = v->fmt;
738	while ((*cp++ = *fcp++));
739
740#define	CHKINF127(n)	(((n) > 127) && (v->flag & INF127) ? 127 : (n))
741
742	switch (v->type) {
743	case CHAR:
744		(void)asprintf(&str, ofmt, *(char *)bp);
745		break;
746	case UCHAR:
747		(void)asprintf(&str, ofmt, *(u_char *)bp);
748		break;
749	case SHORT:
750		(void)asprintf(&str, ofmt, *(short *)bp);
751		break;
752	case USHORT:
753		(void)asprintf(&str, ofmt, *(u_short *)bp);
754		break;
755	case INT:
756		(void)asprintf(&str, ofmt, *(int *)bp);
757		break;
758	case UINT:
759		(void)asprintf(&str, ofmt, CHKINF127(*(u_int *)bp));
760		break;
761	case LONG:
762		(void)asprintf(&str, ofmt, *(long *)bp);
763		break;
764	case ULONG:
765		(void)asprintf(&str, ofmt, *(u_long *)bp);
766		break;
767	case KPTR:
768		(void)asprintf(&str, ofmt, *(u_long *)bp);
769		break;
770	case PGTOK:
771		(void)asprintf(&str, ofmt, ps_pgtok(*(u_long *)bp));
772		break;
773	default:
774		errx(1, "unknown type %d", v->type);
775	}
776
777	return (str);
778}
779
780char *
781kvar(KINFO *k, VARENT *ve)
782{
783	VAR *v;
784
785	v = ve->var;
786	return (printval((char *)((char *)k->ki_p + v->off), v));
787}
788
789char *
790rvar(KINFO *k, VARENT *ve)
791{
792	VAR *v;
793
794	v = ve->var;
795	if (!k->ki_valid)
796		return (NULL);
797	return (printval((char *)((char *)(&k->ki_p->ki_rusage) + v->off), v));
798}
799
800char *
801emulname(KINFO *k, VARENT *ve __unused)
802{
803
804	return (strdup(k->ki_p->ki_emul));
805}
806
807char *
808label(KINFO *k, VARENT *ve __unused)
809{
810	char *string;
811	mac_t proclabel;
812	int error;
813
814	string = NULL;
815	if (mac_prepare_process_label(&proclabel) == -1) {
816		warn("mac_prepare_process_label");
817		goto out;
818	}
819	error = mac_get_pid(k->ki_p->ki_pid, proclabel);
820	if (error == 0) {
821		if (mac_to_text(proclabel, &string) == -1)
822			string = NULL;
823	}
824	mac_free(proclabel);
825out:
826	return (string);
827}
828
829char *
830loginclass(KINFO *k, VARENT *ve __unused)
831{
832
833	/*
834	 * Don't display login class for system processes;
835	 * login classes are used for resource limits,
836	 * and limits don't apply to system processes.
837	 */
838	if (k->ki_p->ki_flag & P_SYSTEM) {
839		return (strdup("-"));
840	}
841	return (strdup(k->ki_p->ki_loginclass));
842}
843